Marker Therapeutics, Inc. (Nasdaq: MRKR) shares surged by 45% as the company released positive pre-clinical Data on one of its candidates, MT-601. They tested it on lymphoma cells in the lab, and the results showed that MT-601 can kill lymphoma cells resistant to another treatment called CD19 CAR T therapy, which is fascinating news considering many patients who receive CD19 CAR T therapy still experience a relapse within a year.
“We have recently developed a long-term in vitro model to monitor the interaction of T cells with cancerous cells. Data from a lymphoma cell line utilizing this model demonstrated that MT-601 inhibited the growth of lymphoma cells as well as the growth of CD19 CAR-resistant lymphoma cells,” said Eric A. Smith, Ph.D., Director of Research and Development at Marker Therapeutics. Marker has posted further details about this preclinical study on the Investor Relations section of its website.
Dr. Smith continued, “Specifically, we have developed an in vitro model which reproduces the CD19 antigen-negative tumor that causes relapse and observed the following:
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In this in vitro model, 98% of lymphoma cells were eliminated after a CD19-targeting CAR T cell product was administered.
While the CAR T cells significantly controlled lymphoma cell growth, we observed that three weeks after the start of anti-CD19 CAR T cell administration, a population of lymphoma cells resistant to CD19 CAR T cell administration started to grow.
These CD19 CAR-resistant lymphoma cells were tested for CD19 expression. They were shown to be negative for the CD19 surface antigen, which explained why they were no longer controlled with a second administration of anti-C19 CAR T cells, thus recapitulating the antigen-negative relapse observations in CAR relapsed/refractory lymphoma patients.
However, when MT-601, with its broad antigen recognition (Survivin, NY-ESO-1, WT-1, PRAME, MAGE-A4, SSX2), was added to this anti-CD19 CAR T cell resistant cell population, complete growth inhibition was observed.
These data highlight that MT-601 can potentially eliminate CD19 CAR T cell refractory tumors, indicating that MT-601 might offer a viable therapeutic option for lymphoma patients that have relapsed from previous CAR T cell interventions.”

MT-601 targets multiple substances on cancer cells and may provide longer-lasting results than CD19 CAR T therapy. Marker Therapeutics has started a clinical trial to test MT-601 on lymphoma patients who have relapsed after CD19 CAR T therapy or cannot receive it. The early lab results showed that MT-601 could inhibit the growth of lymphoma cells, including those resistant to CD19 CAR T therapy. The initial results have shown remarkable promise, and the team is thrilled to advance the testing of MT-601 in further clinical trials to evaluate its effectiveness and safety.
About Marker Therapeutics, Inc.
Marker Therapeutics is a company currently in the advanced stages of clinical research for developing innovative treatments in immuno-oncology. Their primary focus is on creating next-generation immunotherapies that utilize T cells, a type of immune cell, to target and fight against hematological malignancies (cancers of the blood, such as leukemia and lymphoma) and solid tumors (cancers that form in tissues or organs). These therapies aim to harness the immune system’s power to specifically recognize and eliminate cancer cells, offering potential new treatment options for patients with these types of cancers.
Capital structure
Marker Therapeutics has an outstanding total of 8.8M shares and presents a relatively small float of 6.64M shares available for public trading. Insiders hold approximately 12.82% of the shares, while institutional investors hold around 22.63%. Examining their trading history, the average volume typically hovers around 100,000 shares. In light of the positive news today, the trading activity trended much higher, with an impressive 27M shares traded at time of writing. This translates to a 270-fold increase compared to their average volume, also 4x their float.
It is essential to recognize the high volatility and rapid movements associated with Marker Therapeutics’ stock, primarily driven by the limited availability of shares. Such stocks tend to attract the interest of day and swing traders, given their propensity for swift gains or losses based on trading strategies. As evidence, a single positive news catalyst in the biotech sector can trigger a substantial surge in stock price and exponentially increase trading volume to unprecedented levels.
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Kurt Wendler
June 24, 2022 at 12:46 pm
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