Gritstone Announces Updated Overall Survival Results from Phase 1/2 GRANITE Study and Poster at SITC 2022

Gritstone Announces Updated Overall Survival Results from Phase 1/2 GRANITE Study and Poster at SITC 2022

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— The median total survival (OS) for sufferers with secure microsatellite metastatic colorectal most cancers (MSS-CRC) who had beforehand obtained two strains of therapy and had a molecular response will now exceed 22 months – the median now not has not but been reached —

— Sufferers who obtain a molecular response embody these with liver metastases who will not be enriched for baseline PD-L1 expression, excessive tumor mutation load, or IFNg-related genes–

EMERYVILLE, Calif., Nov. 10, 2022 (GLOBE NEWSWIRE) — Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology firm working to develop the world’s most potent vaccines, at the moment introduced an replace up to date total survival (OS) outcomes from its Part 1/2 examine evaluating GRANITE, an individualized vaccine immunotherapy, for the therapy of superior strong tumors. These outcomes, together with the outcomes of a clinicopathologic evaluation of sufferers with metastatic MSS-CRC with and and not using a molecular response, shall be offered through a poster on the Society for Immunotherapy of Most cancers (SITC) 37e Annual assembly.

“Observe-up knowledge from our Part 1/2 examine in sufferers with MSS-CRC who obtained a minimum of two prior strains of therapy proceed to display an affiliation between molecular response and total survival,” stated Andrew Allen. , MD, Ph.D., co-founder, president and CEO of Gritstone. “The median total survival (MOS) in sufferers with MSS-CRC who had a molecular response has nonetheless not been reached and can now exceed 22 months; 4 further months since our final replace in Could 2022. It is a notable distinction from the 6-7 month MOS sometimes seen in third-line MSS-CRC and seven.8 month MOS in sufferers with no molecular response in our examine. Clinicopathologic evaluation exhibits that sufferers with MSS-CRC who obtain molecular response don’t have elevated tumor mutation load, PD-L1 expression, or elevated IFNg-related gene expression. We’re additionally seeing molecular responses in sufferers with liver metastases, a subset that sometimes receives little profit from immunotherapy. The latest publication of GRANITE Part 1/2 leads to Nature Drugs particulars this system’s novel method, and the information to this point demonstrates its promise in difficult-to-treat and end-of-line settings. The section 2/3 GRANITE randomized examine in front-line CRC, the place sufferers usually have extra time to develop an immune response, is ongoing and preliminary knowledge is predicted in 4Q2023. »

The Part 1/2 examine is evaluating the security, immunogenicity and scientific exercise of GRANITE together with the PD-1 checkpoint inhibitor nivolumab and ipilimumab, a subcutaneous anti -CTLA-4, in superior strong tumors. This examine recruited and handled 29 sufferers with beforehand handled metastatic strong tumors, together with sufferers with colorectal most cancers, gastroesophageal adenocarcinoma, and non-small cell lung most cancers. Of 13 sufferers with MSS-CRC, 6 achieved a molecular response outlined as ≥30% discount in circulating tumor DNA (ctDNA) and proceed to have an total survival benefit in comparison with sufferers with no molecular response .

GRANITE Part 1/2 OS Knowledge Replace:

  • 6 of the 13 sufferers handled with MSS-CRC had a molecular response and the median total survival noticed on this group will now exceed 22 months (median OS not but reached versus 7.8 months in these with out molecular response). This compares to a median total survival not but achieved and higher than 18 months as reported in Could 2022.

Clinicopathologic traits of GRANITE Part 1/2:

  • 4 of 6 sufferers with a molecular response had liver metastases.

  • All sufferers had PD-L1 expression < 1% and low ranges of expression of IFNg-related genes.

  • The median tumor mutation load was 2.9 and three.6 mutations/MB in these with and with out molecular response, respectively.

The main points of the presentation of the SITC are as follows:
Summary 660: Clinicopathologic traits of sufferers with metastatic colorectal most cancers with molecular responses following therapy with an individualized neoantigen vaccine routine
Date hour : Friday, November 11, 2022: 9:00 a.m. – 8:30 p.m. EST
Session: Ongoing scientific trials
Location: Boston Conference and Exhibition Middle: Concourse C

Gritstone’s neoantigen-based immunotherapies are designed to elicit a major T-cell (significantly CD8+ cytotoxic T-cell) response in opposition to mutation-derived tumor-specific neoantigens (TSNA). Gritstone identifies these ASSWs utilizing its proprietary synthetic intelligence platform, EDGE™. GRANITE is an individualized neoantigen-based immunotherapy program that makes use of adenoviral (“prime”) and self-amplified (“increase”) mRNA vectors to ship personalised immunotherapy containing the related neoantigens. GRANITE has obtained Quick Observe designation from the USA Meals and Drug Administration for the therapy of MSS-CRC.

About Natural Gritstone
Gritstone works to create essentially the most highly effective vaccines on this planet. We leverage our modern vectors and payloads to coach a number of arms of the immune system to assault crucial illness targets and have applications in viral ailments and strong tumors. Independently and with our companions, we’re creating a pipeline of product candidates with the aim of enhancing affected person outcomes and eliminating illness.

Gritstone Ahead-Trying Statements
This press launch incorporates forward-looking statements, together with, however not restricted to, statements associated to the potential of Gritstone’s therapeutic applications; the progress of Gritstone’s ongoing scientific trials; the timing of knowledge bulletins associated to ongoing scientific trials and the initiation of future scientific trials. These forward-looking statements contain substantial dangers and uncertainties that would trigger Gritstone’s analysis and scientific improvement applications, future outcomes, efficiency or achievements to vary materially from these expressed or implied by the forward-looking statements. These dangers and uncertainties embody, amongst others, uncertainties inherent within the drug improvement course of, together with the stage of scientific improvement of Gritstone’s applications, the method for designing and conducting preclinical and scientific trials, the approval processes regulatory filings, the challenges related to pharmaceutical manufacturing, Gritstone’s capability to efficiently set up, shield and defend its mental property and different issues that would have an effect on the sufficiency of present liquidity to fund operations. Gritstone assumes no obligation to replace or revise any forward-looking statements. For a extra detailed description of the dangers and uncertainties that would trigger precise outcomes to vary from these expressed in these forward-looking statements, in addition to dangers referring to the corporate’s enterprise usually, see Gritstone’s newest annual report on the Kind 10-Ok filed March 10, 2022, in addition to Gritstone’s quarterly stories on Kind 10-Q filed Could 5, 2022 and August 4, 2022 and all present and periodic stories filed with the Securities and Alternate Fee.

Grindstone Contacts
George E. MacDougall
Director, Investor Relations and Company Communications
Gritstone Bio, Inc.
[email protected]

Dan Budwick
(973) 271-6085
[email protected]

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