studies showed a dose-dependent increase in CPI-006 plasma exposure, with doses of 6 mg/kg and higher producing sustained plasma
levels of CPI-006 and doses of 12 mg/kg and higher achieving complete and sustained occupancy of CD73 on peripheral blood lymphocytes.
revealed penetration of CPI-006 and complete occupancy of CD73 in tumors at doses of 18 mg/kg, which is the selected dose for
continued expansion of the study.
In vitro results revealed that CPI-006 induced B-cell differentiation into both plasmablasts and memory B-cells, promoted secretion
of immunoglobulin M (IgM), and class switching of the IgM to produce immunoglobulin G (IgG).
In vivo results demonstrated that trea
tment with CPI-006 produced changes in blood B-cell and T-cell levels, highlighted by
a reduction in circulating B-cells within 30 minutes of treatment, with a partial return by 21 days, and with returning B-cell
levels heavily enriched with memory B-cells.These changes are consistent with the in vitro findings that suggest that CPI-006
induces a humoral adaptive immune response.
A specific analysis of the B-cell receptor repertoire (the range of B-cell receptors expressed by the total B-cell population)
revealed that several patients exhibited the induction of new memory B-cell clones in blood following treatment with CPI-006, with
clonal frequencies as high as 1%, supporting a very strong antibody immune response comparable or exceeding that seen when patients
receive vaccinations. These findings are consistent with antigen driven clonal expansion of B-cells.
In evaluable patients receiving 6 mg/kg and higher in the protocol defined, pre-specified disease specific cohorts, tumor regression
was seen in four of nine patients: mCRPC (one of two patients; reduction of 18.2%), RCC (two of five patients; reduction of 7.0%,
21.3%) and NSCLC (one of two patients; reduction of 5.8%).
patient with metastatic prostate cancer that had previously failed multiple anti-androgen therapies and chemotherapy received
over 19 cycles (a cycle equals 21 days) of CPI-006 monotherapy at a dose of 6 mg/kg and showed reduction in tumor volume and a
reduction in bone pain.
was well tolerated at all dose levels, with no dose-limiting toxicities. Grade 1 infusion reactions were detected (N=3 patients)
and mitigated with premedication with acetaminophen and antihistamine. Grade 3 or 4 toxicities included a grade 3 anemia (N=1)
and a grade 3/4 diarrhea (N=1).
The Company also announced updated data on the Adenosine Gene Signature. The key highlights
from the updated data include:
The Adenosine Gene Signature was examined in 32 patients with advanced refractory renal cell cancer, including 21 that were
positive for this biomarker and 11 that were negative for this biomarker. In patients with a positive biomarker result, 17% had
a partial response (PR) and many had tumor regression that did not meet the response evaluation criteria in solid tumors (RECIST)
for PR. In patients with a negative biomarker result, there were no responses. In the 21 patients in the Adenosine Gene Signature
positive group, 9 patients had tumor regression; 4 patients had no change in tumor size and 8 patients had tumor progression as
best response; no patients in the negative group showed tumor reduction. There was a statistically significant correlation of the
Adenosine Gene Signature with tumor response, p=0.008.
A positive Adenosine Gene Signature was also associated with duration of response. Six of 21 patients had progression free
survival (PFS) exceeding 40 weeks, with a plateau on the curve, and all of these patients were Adenosine Gene Signature positive,
including four patients who had failed prior therapies with anti PD(L)-1.
CPI-006 blocks CD73 enzymatic activity and prevents conversion of adenosine monophosphate (AMP) to adenosine leading to an
elevation of AMP levels.
AMP induces gene expression changes nearly identical to the Adenosine Gene Signature due to its ability to bind to and activate
the adenosine A2A receptor, producing similar effects to that of adenosine binding to the A2A receptor.
CD73 antagonists preserve AMP and thereby amplify the AMP gene expression signature.
Ciforadenant (which has been shown to inhibit adenosine binding to A2A receptor) blocks both AMP and adenosine induced gene
This suggests that use of CPI-006 (which has been shown to inhibit adenosine production) in combination with ciforadenant could
be a more effective way to block the immunosuppressive effects of A2A receptor signaling.
Regulation FD Disclosure.
On November 8, 2019, the updated results from the CPI-006 trial discussed
above were presented in an oral session at the Society for Immunotherapy of Cancer (SITC) Annual Meeting in National Harbor, Maryland
by Jason J. Luke, M.D., principal investigator of the trial and Director of the Cancer Immunotherapeutics Center at UPMC Hillman
Cancer Center and Associate Professor of Medicine at the University of Pittsburgh School of Medicine. A copy of the presentation
is furnished as Exhibit 99.1 to this Current Report and is incorporated herein by reference.
On November 8, 2019, the updated data on the Adenosine Gene Signature
discussed above were presented in a poster session by Stephen Willingham, Ph.D., Corvus Senior Scientist. A copy of the poster
is furnished as Exhibit 99.2 to this Current Report and is incorporated herein by reference.
The information in this Item 7.01 of this Current Report on Form
8-K (including Exhibits 99.1 and 99.2) shall not be deemed filed for purposes of Section 18 of the Securities Act
of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities of that Section, or incorporated
by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set
forth by specific reference in such filing.
To the extent that statements contained herein or in the presentations
attached hereto as Exhibits 99.1 and 99.2 are not descriptions of historical facts regarding Corvus, they are forward-looking statements
reflecting the current beliefs and expectations of management made pursuant to the safe harbor provisions of the Private Securities
Litigation Reform Act of 1995, including statements related to the potential safety and efficacy of CPI-006 and ciforadenant (CPI-444),
the Companys ability to develop and advance product candidates into and successfully complete preclinical studies and clinical
trials, including the Companys Phase 1/1b clinical trial of CPI-006, the utility of biomarker data collected and the suitability
of dosing regimen selected for clinical trials and the potential utility of the Adenosine Gene Signature to identify patients that
are most likely to respond to therapies targeting the adenosine pathway. Such forward-looking statements involve substantial risks
and uncertainties that could cause the Companys clinical development programs, future results, performance, or achievements
to differ significantly from those expressed or implied by the forward-looking statements. For a description of the risks and uncertainties
that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to
the business of the Company in general, see Corvus reports filed with the Securities and Exchange Commission (SEC),
including its Quarterly Report on Form 10-Q for the quarter ended September 30, 2019, filed with the SEC on October 29, 2019, as
well as other documents that may be filed by the Company from time to time with the SEC.
Financial Statements and Exhibits.
Presentation by Jason J. Luke, M.D., principal investigator of the trial and Director of the Cancer Immunotherapeutics Center at UPMC Hillman Cancer Center and Associate Professor of Medicine at the University of Pittsburg School of Medicine.
Poster presented by Stephen Willingham, Ph.D., Corvus Senior Scientist.
Pursuant to the requirements of the Securities Exchange Act of 1934,
as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
CORVUS PHARMACEUTICALS, INC.
Date: November 8, 2019
/s/ Leiv Lea
Chief Financial Officer
makes a similar move, sign up!
Other recent filings from the company include the following:
On September - Sept. 17, 2020
Corvus Pharmaceuticals, Inc. director was just granted 30,000 options - Sept. 15, 2020
Corvus Pharmaceuticals, Inc. director just declared 0 ownership of the company. - Sept. 15, 2020
Departure of Directors or Certain - Sept. 11, 2020
On September - Sept. 10, 2020