Showing posts with label Dr. Jeffrey S. Weber. Show all posts
Showing posts with label Dr. Jeffrey S. Weber. Show all posts

June 26, 2015

Hypothesis: Intralesional PV10 induces systemic immunity in humans

Provectus issued a press release today and made an associated 8-K filing (that included another item) regarding Moffitt Cancer Center's Dr. Vernon Sondak, MD's presentation in Munich, Germany, Provectus Biopharmaceuticals' Data on PV-10 as Treatment for Melanoma Presented at 5th European Post-Chicago Melanoma / Skin Cancer Meeting. The company made Dr. Sondak's presentation available; the link is here.

I believe the key takeaway comes from the 19th slide in the deck, which clearly and simply states [what I think is] the ultimate goal of Moffitt's research work on PV-10: to prove or disprove the hypothesis that intralesional PV10 induces systemic immunity in humans [for melanoma].
Click to enlarge. Slide no. 19. New 2015 slide (v. 2014)
The other slide of note [to me], and that I was struck by, was the presentation's final slide (of "The Moffitt PV-10 Team").
Click to enlarge. Slide no. 21. New 2015 slide (v. 2014)
Below I compare Sondak's 2014 presentation to his 2015 one, which in the early going are ostensibly the same. A shareholder who attended last year's presentation sent me pictures of it.

Disclosures
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 2
Potential Applications
Click to enlarge. 2014
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 3
Click to enlarge. 2015: Slide no. 4
Properties of the Ideal Agent
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 5
New in 2015: Sondak included a "history of" slide, which speaks to Rose Bengal lying around in plain sight of Big Pharma for about 75 years before Provectus' cofounders "re-discovered" it, and the drug substance/drug product's safety and specificity (i.e., Pharmacology).
Click to enlarge. 2015: Slide no. 6
Properties of PV-10
Click to enlarge. 2014 
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 7
Click to enlarge. 2015: Slide no. 8
Click to enlarge. 2015: Slide no. 9
New in 2015: A picture of Melanoma Institute Australia and the University of Sydney's Dr./Prof. John Thompson, MD with PV-10 (Rose Bengal) on his face?
Click to enlarge. 2015: Slide no. 10 
Click to enlarge. 2014
Click to enlarge. 2014
Click to enlarge. 2014
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 12
Click to enlarge. 2015: Slide no. 13
Click to enlarge. 2015: Slide no. 11
Click to enlarge. 2015: Slide no. 14
New in 2015: Summary/overview slides of Moffitt's work to assess systemic immunity from intralesional therapy, in mice and humans (noting whether and where such work was or was not published in a peer-reviewed journal).
Click to enlarge. 2015: Slide no. 15
Click to enlarge. 2015: Slide no. 16
Click to enlarge. 2015: Slide no. 17
Click to enlarge. 2015: Slide no. 18
Click to enlarge. 2015: Slide no. 19. Notable, as discussed above
Conclusions
Click to enlarge. 2014
Click to enlarge. 2015: Slide no. 20
Final Slide

Sondak's final June 2014 presentation slide was telling, given the FDA's May 2014 denial of Provectus' application for breakthrough therapy designation for PV-10 (in locally advanced cutaneous melanoma), and that he made that presentation well before the Agency's April 2015's advisory committees overwhelming vote in favor of Amgen's talimogene laherparepvec ("T-Vec") having an overall favorable benefit-risk profile for the treatment of injectable regionally or distantly metastatic melanoma (for the latter, see blog post The first guy through the wall).
Click to enlarge. 2014
In June 2015, however, there are smiling faces:
Click to enlarge. 2015: Slide no. 21
Recall Eric said on Provectus' May 7th 1Q15 conference call:
"We really can't speculate on the direct implications of the T-VEC decision other than to say that clearly the regulatory environment is continuing to change what the agency identified deficiencies in the T-VEC package. And this may come as significant review questions when the agency finalizes the review of potential decision to approve or not approve the BLA, the application for approval for that my logic may have relevance for us going forward. That being said, the end points that were used for the T-VEC pivotal study were different than the ones that we used in Phase 2 study. And more importantly, the T-VEC Phase 3 study, pivotal study was larger, so have more patients than we have in the Phase 2 study. I would speculate that we can see that what was clearly very strong headwinds a year ago are maybe abating here in Washington and that presumably bodes well for future success with PV-10." {Underlined emphasis is mine}

N.B. Provectus did not make Dr. Sondak's 2014 presentation at the 4th European Post-Chicago Melanoma / Skin Cancer Meeting available last year. For whatever reason (e.g., perhaps Eric is more comfortable and confident now than he was then*), Provectus' Chief Technology Officer Dr. Eric Wachter, PhD appears to have allowed the company's Chief Operating Officer/Chief Financial Officer Peter Culepper to press release the 2015 presentation.

* If true and in the absence of more explanation directly from him on this, then my reaction is that such feeling(s) is(are) are disrespectful to Provectus shareholders and representative of an intellectually inconsistent sub-process.

October 18, 2014

"PV-10 delivers greatest effects when all lesions are injected"

The title of an article published this week by medical writer Janet Fricker, who has written several times about PV-10, provided a cogent description of the drug's value proposition for its patient population afflicted with melanoma, and, eventually, I believe, for all solid tumor cancers: PV-10 delivers greatest effects when all lesions are injected, which discussed Provectus' completed Phase 2 trial data presented at ESMO 2014.

Because PV-10 is very safe, the more you give, the more you get. No dose limiting toxicity.

The article frames what might be expected from the upcoming pivotal Phase 3 trial for unresectable locally advanced cutaneous melanoma, in large part because of the trial's design whereby all lesions will be injected:
"The latest analysis reported at ESMO reveals that the subgroup of 28 patients who had all their lesions injected achieved a progression free survival of 9.8 months compared to 6.0 months for the seven patients who had a median of five untreated lesions. “The progression free survival of 9.8 months compares favourably with historical progression free survivals of less than 2.5 months for DTIC/TMZ,” commented Sanjiv Agarwala, the first author from St. Luke’s Hospital and Health Network, Bethlehem, Pennsylvania." {Underlined emphasis is mine}
The more lesions into which PV-10 is injected ("the more you give"), the more antigens are created and released, the more antigens then are presented, the more the immune system then is primed and activated, the more T-cells then are trafficked to tumors, the more T-cells then infiltrate tumors, the more cancer cells then are recognized by T-cells, and the more cancer cells finally are killed ("the more you get").

No dose limiting toxicity. PV-10 can deliver its greatest effect because it can be injected into all lesions until they (and occult cancer cells) go away.

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Provectus made a Form D filing on October 15th related to a possible financing of up to $15 million through Network 1 Financial Securities. I previously wrote about this two weeks ago. See Fundraising (October 3, 2014) and Fundraising -- Updated (October 4, 2014) on the blog's News page. The filing noted: "Sales in the offering will be staged incrementally at the sole discretion of the Company."

It has been said the company could require additional cash to meet requested or demanded requirements of the New York Stock Exchange and/or Provectus' accounting firm BDO. Be that as it may, Provectus concurrently is trying to close a regional license transaction with Chinese pharmaceutical distributor Sinopharm and garner sufficient payment at the signing of a definitive agreement in order to obviate the need to raise money via Network 1.

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A deal structure that potentially may provide insight into Provectus' discussions with Sinopharm is Celsion's 2013 license deal, ultimately not consummated, with Zhejiang Hisun Pharmaceutical Company ("Hisun) for China. This deal was constructed as:
  • $25 million at signing of a definitive agreement (Celsion previously received $10 million from two payments, which then were credited against the signing amount),
  • $55 million in upfront milestone and regulatory milestone payments over 18 months,
  • $45 million in sales target milestone payments, and 
  • Escalating double-digit sales royalties over ten years.
Because no further or amended Form D filing has been made as of this writing (to disclose Provectus took in money from the above mentioned offering), I assume Peter is able to "hold off" the NYSE and/or BDO for a period of time until he can ascertain what cash he would receive from Sinopharm upon signing of a definitive agreement (should such a license transaction be completed).

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St. Luke's Cancer Center's Dr. Sanjiv Agarwala, M.D. is presenting at 5:30 pm local time (5:30 am EST) on October 18th (today) at the 2014 Beijing International Melanoma Congress. See 2014 Beijing International Melanoma Congress (October 7, 2014) on the blog's News page. An interview with Peter conducted by BioMedReports, which discussed the Provectus-Sinopharm memorandum of understanding, was published on October 16th. I very much dislike Provectus raising this topic beyond the initial press release of August 18th (much like they repetitively mentioned their breakthrough therapy application earlier this year). Nevertheless, the interview, likely conducted this week, and proximate to Dr. Agarwala's presentation, at which I imagine Provectus principals and/or advisors should be in attendance, contained some noteworthy items, among them:

"We will be able to assign the license agreement and will control the supply chain unless we agree to do otherwise." Being able to assign the license to an end-game acquirer is an important Provectus-Sinopharm contract item. Under what circumstances would Provectus agree to relinquishing supply chain control? I would think Provectus would consider this only in the context of Big Pharma discussions about a transaction for the company, and only in conjunction with a global partner that has an existing (e.g., Pfizer's 2012 national retail strategic cooperation framework agreement) or planned partnership with Sinopharm.

"Also, PV-10 as an anti-tumor agent that is injected is very appealing to the China and India patient population and their caregivers."

Peter also replied, in answer to the question of what is the object PVCT has in doing business in Asia: "For our signature drug, PV-10 to treat liver cancer, most of the liver patients are in Asia versus the US or Western Europe." I think it's obvious the Chinese, in this case Sinopharm, are more interested in seeing or confirming the final and/or filed liver protocol for a Provectus Phase 2 liver trial than they would be in a filed protocol for the Phase 3 melanoma trial.

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Returning to the Celsion deal structure, it seems to me the nature of the discussions and negotiations between Provectus and Sinopharm probably now revolve around how much of near-term money is available (from Sinopharm) to be paid (to Provectus) at (i) signing of a definitive agreement and (ii) upon checking of whatever box(es) to be deemed an upfront payment. This matters for both substantive and cosmetic reasons. For example, more money sooner is better than the same money later...duh. More money sooner makes a bigger splash. All of this assumes the other compoents of the deal structure are sufficiently good.

Ultimately, Provectus shareholders want management to close a good deal that is well structured, and not contrived. Management has not reached for nor agreed to [very likely informal] deal offers in the past that poorly valued their innovation. I do not expect them to start settling now.

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On October 15th the company issued another press release about Moffitt's presentation at the annual meeting of SITC in early-November, and filed an associated 8-K. Of note was the comment Moffitt's poster will be available and presented at two sessions, during the regular poster viewing one and at an evening Presidential reception. In addition, Craig's obligatory quote contained a couple of potentially notable words and phrases, which I hope ultimately are indeed notable.
“Dr. Pilon-Thomas and her team at Moffitt have been doing very interesting work assessing the potential combinations of PV-10 with immune checkpoint inhibitors for melanoma. Their work may be an important step forward as part of our corporate strategy for addressing unmet need in late stage melanoma patients and in other uses of PV-10.” {Underlined emphasis is mine}
I suppose “very interesting” means unprecedented and unique in scientific parlance? Does “other uses” means other indications (like breast cancer, which was included in Moffitt's AACR 2013 poster: Intralesional Injection with PV-10 Induces a Systemic Anti-tumor Immune Response in Murine Models of Breast Cancer and Melanoma)?

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Finally, in a press release and associated 8-K filing on October 16th Provectus confirmed Dr. Agarwala's presentation of PV-10 clinical data and value proposition (as a monotherapy and in combination) as part of a satellite session sponsored by Amgen and titled “Oncolytic immunotherapy – engaging the immune system to target melanoma” on November 15th at the 11th International Congress of the Society for Melanoma Research in Zurich, Switzerland. See Melanoma Congress 2014 (October 15, 2014) on the blog's News page.

Dr. Agarwala's continues his three-month world tour of Spain (September 28th), Russia (October 12th), China (October 18th) and, now, Switzerland (November 15th). Medical oncologist Agarwala may see the potential opportunity to enhance his position as a global key opinion leader with the success of PV-10 as a monotherapy for earlier stages of disease.

Medical oncologist and Moffitt Cancer Center's Dr. Jeffrey Weber probably sees the potential opportunity to further enhance his position as a global key opinion leader responsible for translating investigational compounds into approved drugs with the success of PV-10 in combination with immune checkpoint blockade (inhibitors) for late stage disease. That, however, is for a later discussion and debate once we learn more about Moffitt's presentation and data at SITC 2014 on November 8th.

November 5, 2013

Expect More


March 2010: In a clinical development overview presentation, Eric discussed the company's licensure pathway for PV-10, and presented the case for and against accelerated approval. "PV-10 is snake oil" must have been a nearly universal impression among the medical oncology community at the time, until recently. At best, this community might have considered PV-10 solely a local ablative agent, since no ablative agent had ever elicited significant systemic effect. The novelty of a local agent providing a systemic benefit surely must have been on the mind of FDA personnel, too.

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At that time, when discussing the consensus Phase 3 trial path, Provectus presented a trial endpoint of durable response after 6 months. PV-10's intralesional therapy competitors previously had initiated Phase 3 trials with primary endpoints of durable response after 6 months (BioVex's OncoVex, later Amgen's talimogene laherparepvec or T-vec) and objective response after 24 weeks [6 months] (Vical's Allovectin-7). We now know T-vec met is primary endpoint and Allovectin-7 did not.

Using the decision tree illustrated above, Management approached the FDA to seek accelerated approval ("AA") with "robust" interim metrics based on at least preliminary data on 40 of 80 patients.

April-June 2010: A few months later at the company's initial end-of-phase 2 ("EOP2") meeting with the Agency in April, it would seem, the FDA said no (or, not now) to the company's ask for AA. At the time the rumor, such as it was, was something to the effect that the FDA would seriously consider accelerated approval for PV-10 if the drug's mechanism of action ("MOA") could be further elucidated or understood better. The April press release contained the following quote by Craig, "We are fortunate that our capital resources afford flexibility to consider pursuing both the conventional Phase 3 pathway, as well as an accelerated route to licensure. While we believe the Phase 3 with an SPA represents an industry standard path to approval, we believe the door may still be open for accelerated approval."

At an ASCO 2010 investor event held by Provectus Eric presented the primary path (yellow) management ostensibly was going to pursue. He also presented a summary of the "robust" data presumably also shown to the FDA.
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Like in Craig's April PR quote, Eric's June presentation still discussed management's intent to pursue a dual path for regulatory approval.
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August 2010. More than three years ago, in a knoxvillebiz.com article, Eric said: "“If we had an ironclad explanation of this bystander effect that they could understand that it was … real and … why it was occurring, they would be more amenable to a more aggressive pathway to approval,” Wachter said of the FDA" (Source: Knox company enters clinical trial stage for cancer drug, Carly Harrington).

It seems to me Plan A was to seek accelerated approval for the local-regional treatment of metastatic melanoma ("AA") as the primary path to regulatory clarity. I don't think management thought having to explain how PV-10 did what it did was necessarily germane to using the drug in a local-regional setting, in light of such efficacy results, and given the safety profile and history of PV-10's active pharmaceutical ingredient Rose Bengal. When the FDA informed management the Agency needed to understand PV-10's MOA, however, I believe management determined to meet that deliverable engaging its fall-back or redundant strategy, Plan B. Plan B, pursued in parallel, and so not a back-up from a sequential perspective, was to seek a special protocol assessment ("SPA") for a pivotal Phase 3 trial. The SPA, "...an industry standard path to approval..." as Craig described it in his April 2010 quote, ensured there was not a single point of failure for Provectus' regulatory approval work.

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I was drawn to initially diligence Craig, Tim and Eric, their work to cure cancer, and this investment opportunity, and to now maintain my investment in the company and support of them in no small part to their time at Oak Ridge National Laboratory. This setting and others like or similar to it are very familiar to me because of my time at the corporate venture capital subsidiary of Science Applications International Corporation ("SAIC"). SAIC, founded by Dr. J. Robert Beyster, Ph.D. ("JRB") in 1969, solved problems of national and global importance, and long had the branding From Science to Solutions.

"While Dr Beyster had no grand plan, the vision and mission of SAIC were very clear. SAIC was going to be built on the notion that each employee was free to pursue his/her idea, once it was done with high ethical standard. Dr Beyster believed that the best way to enforce this vision was to recruit the right people and provide a clear charter for them to follow (SAIC Credo). SAIC’s mission reflected its values: “a long-term dedication to science, national security, and the national interest.” While SAIC wasn’t sure exactly what its next venture would be, it was quite clear on how it was going to get done. If the venture was related to “national security,” then SAIC was going to unleash its “scientific talent pool” to pursue the opportunity for “a fair profit -- nothing more, nothing less...” SAIC was relentless in seeking the best scientific solution to a problem" (Source: Gangaram Singh, Professor of Management, College of Business Administration, San Diego State University, May 2007; a review of The SAIC Solution: How We Built an $8 Billion Employee-Owned Technology Company, J. Robert Beyster with Peter Economy, March 2007).

I worked in SAIC's CFO's office as a summer intern during business school, and later joined its venture capital investment group, SAIC Venture Capital Corporation ("VCC") while Dr. Beyster was Chairman and CEO of SAIC. While I spent a little time supporting the company's M&A group on specific assignments, I spent more time also supporting SAIC's Technology Commercialization group (where the goal was to work with internal organizations looking to commercialize and/or spin-out innovative technologies and products). As an independent but wholly owned subsidiary, VCC's board of directors ("BOD") included Dr. Beyster (Chairman of the BOD) and independent directors Martin Marietta/Lockheed Martin executive and NASA administrator Tom YoungGEICO and Berkshire Hathaway executive Lou Simpson, and investment banker and defense research analyst Wolfgang Demisch.

SAIC's investment arm was birthed to formalize, continue and expand Dr. Beyster's long history of making minority (venture capital) investments in the companies of entrepreneurs and their innovative technologies and products, and to manage the parent company's growing securities holding in Network Solutions. "Shortly after Network Solutions received the domain name contract from the U.S. government, it was purchased by SAIC...in 1995 for $4.7 million. Five years later, SAIC sold Network Solutions to VeriSign for $19.3 billion..." (Source: Names, Numbers, and Network Solutions: The Monetization of the Internet, J. Robert Beyster with Michael A. Daniels, September 2013). My formative investment management years comprise those as a proprietary currency derivatives trader with a Midwest commercial bank, and those as a venture capitalist with VCC.

Dr. Beyster, among other things, was a research scientist from Los Alamos National Laboratory. Los Alamos, Oak Ridge, Sandia National Laboratories ("SNL") and other Department of Energy ("DOE") national labs are GOCOs. "Industrial, academic, and nonprofit organizations have historically managed the Department of Energy national laboratories and other major government owned/contractor operated ("GOCO") facilities. A GOCO partnership allows each partner to perform duties for which it is uniquely suited: the government establishes mission areas, and the private sector implements the missions, using best business practices" (Source: Sandia's Government Owned/Contractor Operated Heritage).

Lockheed Martin managed the Oak Ridge GOCO during Provectus' founders' time at Oak Ridge. Lockheed's ORNL-focused investment arm Innovative Ventures Group invested appears to have invested in Genase, Dr. Scott's company that was birthed from an ORNL research project on which he worked to develop an enzyme giving denim a stonewashed look. One of his partners in Genase was Craig. I do not know Innovative Ventures; I did, however, work with folks from Technology Ventures Corporation, Lockheed's SNL-focused investment group.

SAIC managed the National Cancer Institute at Frederick, the Department of Health and Human Service's only GOCO facility. "The NCI at Frederick and the Frederick National Lab partner with university, government, and corporate scientists to speed the translation of laboratory research into new diagnostic tests and treatments for cancer and AIDS." SAIC has long been NCI at Fredericks' Operations and Technical Support (OTS) contractor, serving as the infrastructure support for the entire facility and employing more than 1,000 staff, including scientists, research assistants, technicians, engineers, administrative, maintenance, and support personnel. Per Dr. Beyster in The SAIC Solution: How We Built an $8 Billion Employee-Owned Technology Company (p. 113): "The NCI support contract was an interesting novelty for us because, according to NCI rules, we had to bid the contract at a very low fee (profit) to be considered for award. There were also some restrictions on our using the NCI contract to attract similar contracts from other potential customers. Although we barely broke even with the contract finances, the GOCO contract allowed us to hired outstanding medical researchers exposing us to the forefront of cancer medical research and, as it turned out, positioning us for the biotechnology and bioterrorism thrusts that developed in the early 2000."

While at VCC, I worked with a number of SAIC-Frederick personnel, as I did with folks from SAIC's ORNL campus.

Xconomy's Luke Timmerman wrote about 21 Red Flags to Watch for in a Biotech Company (October 2013), first and foremost among them: "Weak science: Anyone who follows scientific literature knows a shocking number of studies look groundbreaking when they first appear in top peer-reviewed journals, but the findings can’t be reproduced by anybody in outside labs. Investors should be aware of this, and do some digging to find out if they are investing in established science that has been verified and reproduced by outside groups. An analysis done by Amgen’s Glenn Begley last year, published in Nature, found that only 11 percent of the results from 53 published biology papers could be reproduced. If a company has weak science, “there’s nothing that can correct for this,” says John Maraganore, the CEO of Cambridge, MA-based Alnylam Pharmaceuticals (NASDAQ: ALNY)." Bold emphasis mine.

"Weak science" typically does not come out of the National Labs, or derive from folks who've spent significant time there, especially those who have been recognized accordingly, like Craig, Tim and Eric (below, from Provectus' website):
  • Craig: Awards include an R&D 100 for an industrial enzyme, an Inventor’s Forum New Product Award for a skincare product, and the first Raymond W. Sarber Award for outstanding research in virology.
  • Dr. Scott: Awards include an R&D 100 for an industrial enzyme, the National Laboratory Consortium Award for Excellence in Technology Transfer, the Inventor’s Forum Advanced Technology Award, and the Martin Marietta Energy Systems Inventor of the Year Award.
  • Eric: Awards include an R&D 100 for nanosensors, the Inventors Forum Advanced Technology Award, the Excellence in Research Award from the Oak Ridge National Laboratory, and an Upjohn Fellowship.
Speaking of so-called groundbreaking work published in top peer-reviewed journals that cannot be reproduced by anybody from outside labs, Moffitt Cancer Center has done just that, reproduced Craig's work: apoptosis, tissue and cell selectivity, clinically relevant local and systemic effects, tumor-specific immunity, T cells, immune-mediated response, multi-indication viability, mobile immunity, etc. Moffitt also has expanded their translational understanding and knowledge of PV-10 through more preclinical and clinical work. It seems Moffitt's Dr. Weber, influential in the approvals of Yervoy (ipilimumab) and Zelboraf (vemurafenib).

The smallest autonomous business entity at SAIC was a division, which generated annual revenues ranging from $5-50 million and typically were led by very entrepreneurial managers. Several divisions would form a business unit ("BU"), which generated several hundred million dollars of revenue and had its own managerial and administrative layer. Several BUs would form a group; groups were billion dollar plus organizations with their own leadership teams. The real work, solving client problems (turning science into solutions), often was conducted at the division and BU levels, where divisions might team up to tackle larger problems, whether in size or scope or both.

I am reminded of several tenets of Dr. Beyster's business philosophy that remind me of Craig, Dr. Scott, Eric and Provectus: Solve tough problems for your customers, use science (and technology) to create solutions that work, and do so profitably. For years, SAICers simply went about the business of solving hard problems without so much as the name of the company on nondescript buildings out of deference to customers.

I know I don't take a second look at Craig, Dr. Scott and Eric, let alone diligence them as deeply as I did, and maintain my investment in and support of them without, among other things, their ties to, time and results at and certain accreditations from ORNL.

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November 2010. Later that year, at the 4th Interdisciplinary Melanoma & Skin Cancer Centres Meeting in Sydney, Australia, where Pfizer's Dr. Craig Eagle was said by management to first have visited with Provectus principals and principal investigators about the compound, preliminary MM Phase 2 trial was data was presented.

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At that time, when discussing the consensus Phase 3 trial path, Provectus still presented a trial endpoint of durable response after 6 months. In discussions with Australia's Therapeutic Goods Administration ("TGA")," however, "[t]he proposed primary endpoint of progression free survival, which Provectus proposed to the U.S. Food and Drug Administration (FDA) earlier this year in its first end-of-Phase-2 meeting with FDA, was deemed appropriate for assessment of efficacy in light of established European Medicines Agency (EMEA) standards adopted by TGA." No mention of accelerated approval was made in the presentation, as had been the case in prior medical conference and clinical development overview presentations.

March 2011. Provectus held its second EOP2 meeting with the Agency. This meeting "...addressed several topics central to definition of the applicable patient population and primary endpoint for the company's planned pivotal Phase 3 randomized controlled trial (RCT) of PV-10 for metastatic melanoma." Presumably, this is where the initial primary endpoint of durable response was changed to progression free survival ("PFS").

Management contemplated running a Phase 3 trial in Australia, in hopes of, it appeared, gaining marketing approval in the country. From the same March PR: "We are also assessing whether a second Phase 3 RCT, tailored to meet the regulatory requirements of Australia, would be helpful in accelerating approval in that important market."

Before Moffitt researchers were paid by Provectus for their pre-clinical work, it is now, in 2011, that Moffitt conducted its own unsponsored work (according to management) on PV-10's MOA and immune response.

June 2011: Dr. Sanjiv Agarwala presented at the 7th EADO (European Association of Dermato-Oncology) Conference in Nantes, France.

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The primary endpoint of the pivotal MM Phase 3 trial became PFS. There was no mention of AA. And, the MOA study first was introduced, but without Moffitt's name attached to it, deemed premature to do so by management in its communication strategy in a manner similar to the lack of naming Rockefeller University's Dr. James G. Krueger, M.D., Ph.D., Director, Milstein Medical Research Program, Senior Attending Physician, D. Martin Carter Professor in Clinical Investigation, Laboratory of Investigative Dermatology, who is exploring PH-10's MOA and lack of toxicity as a dermatological agent.

The FDA reorganized in the summer of 2011.

OncoVEX(GM-CSF) and Allovectin-7 received SPAs with their respective primary endpoints for their Phase 3 trials from the Center for Biologics Evaluation and Research's (CBER's) Office of Oncology Drug Products, which was reorganized into the Office of Hematology Oncology Products (OHOP) in 2011. The FDA began the task of moving biological products from CBER to CDER in 2003.

CDER, from whom Provectus initially sought its SPA, had no experience with local agents and the SPA process for melanoma. It was their, CDER's, first time, and the company was making headway with this organization. Management indicated they fully believed and thought CDER was going to award Provectus the SPA in June or July 2011. Did they really?

Both CBER and CDER staff were reshuffled into DOP1 and DOP2 (but CBER did not become OHOP). The Division of Oncology Products 1 (DOP1) and the Division of Oncology Products 2 (DOP2) lie in OHOP.

November 2011: At the 2011 International Melanoma Congress, during the 5th Meeting of Interdisciplinary Melanoma/Skin Cancer Centres meeting, in Tampa, Florida, Professor Merrick Ross, M.D., of the MD Anderson Cancer Center "...confirmed that nonclinical studies, which are designed to characterize the immunologic response to PV-10 chemoablation, are being conducted by researchers at the Moffitt Cancer Center in Tampa, Florida."

Later that same month, Provectus reported on its third EOP2 meeting with the FDA. "This meeting was extremely productive in defining the threshold the FDA will require for approval in melanoma, which is a rapidly evolving therapeutic area." Ipilimumab was approved in March. Vemurafenib was approved in August. In this same November PR, Craig mentions a fourth EOP2 meeting has been requested, muses about a Phase 3 trial in Australia again, and notes the same organization (DOP2) reviewing PV-10 and melanoma would review PV-10 and hepatocellular carcinoma ("HCC").

January 2012: At the time, it felt to me, listening to management, that accelerated approval may have been a possible outcome. Moffitt's work had been underway, the first of which would be presented later that March: PV-10 Mechanism of Action Data to Be Presented at the Society of Surgical Oncology Annual Meeting March 21-24, 2012 in Orlando, Florida (January 17 company press release). This data would have been analyzed, prepared and summarized for an abstract previously [to the issuance of the PR] submitted to the SSO conference.

Let's think back to December 2011, but after the third EOP2 meeting. Provectus had requested a fourth EOP2 meeting. Management routinely says the company asks for AA when it meets (speaks) with the Agency. Perhaps management thought it had answered the FDA's questions about PV-10's systemic proof or benefit utilizing Moffitt's SSO MOA results that, when combined with its preliminary MM Phase 2 trial results, were sufficient to warrant AA. I think my feeling was correct; that management had thought they might get AA.

A day after the January 17th Moffitt SSO PR, it would seem not: Provectus Receives Guidance From FDA On Pathway to Approval for Phase 3 Trial of PV-10 For Metastatic Melanoma: Additional End-of-Phase 2 Meeting Not Required, Company to Submit for Special Protocol Assessment  (January 18 company PR). Did the reorganization influence this, requiring revisiting the novelty of a local agent providing a systemic benefit?

After an absence, AA appeared once again in company communications. This time, in the January 18th PR: "We also continue to assess whether...emerging results from ongoing immunologic mechanism of action studies can be used to support accelerated approval in the U.S."

March 2012: At SSO, Moffitt concluded "...intratumoral PV-10 causes both a direct anti-tumoral response of the injected tumor and a systemic tumor-specific activation of the immune system."

April 2012: The annual CEO letter noted: "[Moffitt's] work is fundamental for full characterization of PV-10's systemic benefit and may provide pivotal support for accelerated approval in the U.S."

June 2012: Dr. Agarwala presented some new and final MM Phase 2 trial data at the 2nd European Post-Chicago Melanoma Meeting 2012, Interdisciplinary Global Conference on Developing New Treatments for Melanoma, which as was prelude to ESMO 2012.

Click on the figure to enlarge it.
Click on the figure to enlarge it. 
Click on the figure to enlarge it.
Click on the figure to enlarge it.
Click on the figure to enlarge it.
At that time, when discussing the consensus Phase 3 trial path, Provectus presented a trial endpoint of PFS, which it previously had noted; however, the trial's patient population had been reduced from 250-300 to 180, and refined from Stage III-IV-M1a to Stage IIIB-IIIC.

The SPA march continued, as Craig noted in the June PR: "The response rate and PFS data presented by Dr. Agarwala underscore our selection of anticipated patient population and primary endpoint for our proposed Phase 3 clinical trial protocol of PV-10 for melanoma, and are supportive of our efforts to successfully complete Special Protocol Assessment with the U.S. Food and Drug Administration (FDA)."

The FDA's breakthrough therapy designation ("BTD") was introduced in the summer of 2012.

October 2012: The month of the PVCTP IPO that did not transpire because something was not achieved still puzzles me. Management alluded to a Pfizer-led investment round that did not materialize, causing a dramatic drop in the share price and tremendous shareholder angst before Provectus pulled the plug on the offering on October 17th.

Before that, on October 2nd, Provectus presented final MM Phase 2 trial data at the ESMO (European Society for Medical Oncology) 2012 Congress in Vienna, Austria.

I've written before about this period of time. The company file a mixed shelf securities offering in July 2012, later followed by the prospectus fully describing the PVCTP "IPO." I think an effective "IPO" was doomed earlier than October, but I cannot get an answer from management on this topic.

Eric noted in the October 2nd PR: "Since our last meeting with FDA in late 2011, we have carefully studied the outcome of different sub-populations of subjects in the Phase 2 study, reviewed the criteria to be used for unambiguous assessment of response, and fostered relationships with key parties that will provide support in execution of the Phase 3 study. We look forward to formal review of the resultant protocol and supportive programmatic elements with FDA under the SPA process." What this all related to the SPA (more trial design minutiae), or was there something here related to AA?

Was the tumult influenced in some respect by the identification, at the time, of blistering?: "A high rate of response in untreated bystander lesions and transient cutaneous locoregional blistering were consistent with the novel tumor-specific immune mediated mechanism of action of PV-10" (ECC 2013 PR from October 2013).

January 2013: Provectus Pharmaceuticals Announces H. Lee Moffitt Cancer Center Initiates Phase 1 Study of PV-10 to Elucidate Bystander Effect. By now, Moffitt is fully onboard with PV-10, with Moffitt's Dr. Amod Sarnaik, M.D. noting Moffitt would verify "...the promising pre-clinical data from our ongoing work in this translational study...," "...elucidate the immunologic basis of the 'bystander effect' noted in previous clinical studies of PV-10...," and "...help optimize PV-10 treatment, particularly in combination with other therapies." Optimize means [t]o make as perfect or effective as possible. One does not optimize something unless one believes there is a sufficiently high enough level of effectiveness -- or efficacy. It was curious, at the time, that Dr. Sarnaik's quote also included: "As Moffitt pursues its mission of contributing to the prevention and cure of cancer, we are pleased to spearhead this important clinical work." The bold emphasis is mine.

April 2013: At the American Association for Cancer Research Annual Meeting in Washington, DC., Moffitt's poster presentation concludes its "...murine studies confirm that PV-10 chemoablation results in both a direct effect on injected lesions as well as a systemic response that leads to regression of uninjected subcutaneous and lung lesions. Intralesional PV-10 treatment leads to the induction of tumor-specific immunity."

This paper was a landmark in the perception of the drug to, among others, the FDA: the local agent now had proof of its systemic benefit.

May 2013: Provectus provided shareholders with an update on its regulatory approval process: "Provectus is finalizing details for submission of a pivotal Phase 3 randomized controlled trial ("RCT") of PV-10 for metastatic melanoma, suitable for Special Protocol Assessment ("SPA"), to the Food and Drug Administration ("FDA"). While preparation for submission of our SPA has taken longer than expected, it is crucial to remember that oncology presents a moving playing field. Fine tuning of the study design is expected to mitigate clinical efficacy risk, optimize patient accrual, and increase FDA's confidence that the study design and protocol will ensure the best possible outcome for our pivotal trial. We have every reason to believe this key milestone will be achieved in 2013.

Provectus is also considering applying for the new Breakthrough Therapy Designation for PV-10 to treat melanoma. This new regulatory pathway was announced with the passage of The Food and Drug Administration Safety and Innovation Act (FDASIA) in July 2012. Breakthrough Therap Designation is intended to expedite the development and review of drugs for serious or life-threatening conditions. The criteria for breakthrough therapy designation require preliminary clinical evidence that demonstrates the drug may have substantial improvement on at least one clinically significant endpoint over available therapy. A breakthrough therapy designation conveys all of the fast track program features as well as more intensive FDA guidance on an efficient drug development program. However, because this program is relatively new, the potential impact of receiving such designation is still unclear, but could be pivotal in achieving an accelerated path for approval of PV-10."

While the first of these two paragraphs supposedly contained a mea culpa from Eric -- "...preparation for submission of our SPA has taken longer than expected..." -- it cryptically described the multi-year pursuit of Plan B, otherwise known as the SPA. The writing of the second paragraph, which described BTD, was other worldly: "However, because this program is relatively new, the potential impact of receiving such designation is still unclear, but could be pivotal in achieving an accelerated path for approval of PV-10." BTD is new but the impact of it is unclear, yet it could help a lot to get PV-10 approved on an accelerated basis. Was this an homage to AA?

Sometime in the first half of the year, the FDA encouraged Provectus to submit for BTD. Like with Moffitt optimizing PV-10, the FDA surely had begun to fully embrace PV-10.

July 2013: Sent in March, accepted in May and published in this month, Moffitt's critical paper Intralesional Injection of Rose Bengal Induces a Systemic Tumor-Specific Immune Response in Murine Models of Melanoma and Breast Cancer formed the second of two pillars underpinning AA (the second being the MM Phase 2 trial results).

August 2013: Single Injection May Revolutionize Melanoma Treatment, Moffitt Study Shows. Single injection. Revolutionize. Heady words from a cancer research center with a national, if not global, reputation. Is the use of the word revolutionize a hop, skip and a jump from the use of the word cure?

September 2013: Dr. Agarwala presented detailed findings of several exploratory analyses of data from Provectus' completed Phase 2 study of intralesional PV-10 in MM at the European Cancer Congress 2013 (ECCO 17- ESMO-38 - ESTRO 32) in Amsterdam, The Netherlands. The poster highlighted clinical and non-clinical evidence that PV-10 induces systemic immunologic activity, and also noted local immunologic activity described as blistering: "A high rate of response in untreated bystander lesions and transient cutaneous locoregional blistering were consistent with the novel tumor-specific immune mediated mechanism of action of PV-10."

Craig noted: "The researchers concluded that PV-10 has a unique immuno-chemoablative profile that offers significant potential due to several important attributes. First, its safety and efficacy compare favorably with existing and emerging therapies. Second, its safety profile makes it an attractive candidate as a combination strategy for treatment of advanced disease. And finally, it provides a powerful combination of rapid reduction of tumor burden with induction of tumor-specific immune response that can achieve rapid disease control in refractory patients with locally advanced melanoma."

"Melanoma patients and their caregivers experience profound discouragement upon recurrence of the serious skin manifestations of this disease. The investigators on this study describe the effect of PV-10 as "rapid, durable response" but as the photographs have documented, many of the PV-10 treated tumors almost appear to have never been present. PV-10 was only injected intermittently, when tumors were present during the first 16 weeks of the study, in stark contrast to typical clinical studies where treatment is given until either resistance is engendered or patients experience unacceptable toxicity. We are gratified that response to PV-10 was demonstrated consistently across all study centers, with minimal intervention in patients refractory to multiple prior treatments. PV-10’s unique mechanism of action, alone or in combination with existing or emerging therapy, has the potential to shift the paradigm in oncology, where an intermittent intervention can dramatically reduce disease burden and may prod the immune system into preventing or arresting the formation of life threatening metastases." Bold emphasis is mine.

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I have spent time trying to understand and record certain history of Craig, Tim and Eric, as ORNL turned into Photogen Technologies turned into Provectus Pharmaceuticals. How did they approach and solve the root of a problem of global importance called cancer? Specificity (at a cellular level). Safety. Route of delivery. A thoughtful choice of Rose Bengal, when it came to the long game of regulatory approval, and drug development expense.

In time, I hope to blog about this history. For now, as the story goes, Craig rushed to the Knoxville airport to test their hypothesis by passing a vial containing a solution of Rose Bengal through an X-ray scanner. In doing so, they not only successfully tested the hypothesis but reduced their idea to practice in the process, showing it worked. As he retrieved the vial and walked away from the machine toward his car he had abandoned in front of the airport, Craig said he felt giddy because he knew he was holding the cure for cancer in his hands. If I have this correct, Tim is said to have remarked he wanted the phrase "cancer was cured here" adorning Welcome to Tennessee signs along those portions of highway crossing state lines. He should get his wish.

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October 2013: We heard the company's BTD and SPA applications have been submitted. We heard proof of systemic benefit, which was made by Moffitt, and the MM Phase 2 trial results, which had been finalized and submitted, were sufficient to provide the regulatory clarity Provectus has long sought. Eric: "“If we had an ironclad explanation of this bystander effect that they could understand that it was … real and … why it was occurring, they would be more amenable to a more aggressive pathway to approval,” Wachter said of the FDA" (August 2010). Moffitt's PLoS paper, published in July, detailed PV-10's systemic benefit. The final MM Phase 2 clinical study report, all 2,339 pages of it, was submitted in October.

November 2013: Management expects regulatory clarity before the end of the year. The baseline expectation is of course the SPA.


I expect more: AA and/or BTD.