TG Therapeutics’ Leukemia Drug Proves Effective

Adding TG-1101 to ibrutinib increased the number of patients with bone marrow confirmed CR’s, MRD negativity

The combination was well tolerated; the addition of TG-1101 did not appear to alter the safety profile of ibrutinib monotherapy

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American Society of Clinical Oncology’s #ASCO Annual Meeting is taking place June 2 to June 6 in Chicago. Several pharmaceutical firms and biotechnology companies are presenting their new drugs and/or present progress on the status of their drugs under development. TG Therapeutics is one of those companies.

#TG Therapeutics $TGTX announced positive results from its Phase 3 $GENUINE trial of #TG-1101 plus ibrutinib in patients with previously treated high risk Chronic #Lymphocytic #Leukemia.
The trial was powered to show a statistically significant improvement in ORR of 30%, with a minimal absolute detectable difference between the two arms of approximately 20%. The trial met its primary endpoint, demonstrating a statistically significant improvement in Overall Response Rate, as assessed by blinded independent central radiology and hematology review by iwCLL criteria, compared to ibrutinib alone in both the Intent to Treat population and Treated population.
The combination was well tolerated and, apart from infusion related reactions, the addition of TG-1101 did not appear to alter the safety profile of ibrutinib monotherapy.
#Neutropenia, occurring in 9% of patients, was the most commonly reported Grade 3/4 Adverse Event in the combination arm, followed by infusion related reactions and #anemia, each reported in 5% of patients.
Neutropenia or #neutropaenia, is an abnormally low concentration of neutrophils (a type of white blood cell) in the blood. Neutrophils make up the majority of circulating white blood cells and serve as the primary defense against infections by destroying bacteria, bacterial fragments and immunoglobulin-bound viruses in the blood.  Patients with neutropenia are more susceptible to bacterial infections and, without prompt medical attention, the condition may become life-threatening.
Notably, the majority of infusion related reactions were Grade 1 or 2 in severity, with only 5% Grade 3/4 IRR observed. Median follow-up for this study was approximately 11.4 months.
In addition to the improvements in ORR, CR and MRD-negativity, a trend in improvement of Progression Free Survival was observed in the combination arm of TG-1101 plus ibrutinib as compared to ibrutinib alone.
“In addition to increasing the overall number of patients that responded to treatment with ibrutinib, adding TG-1101 to ibrutinib increased the number of patients with bone marrow confirmed CR’s, MRD negativity in peripheral blood, deepened nodal responses, and resulted in fewer patients progressing on therapy. Collectively, we see the consistent pattern of enhanced benefit as providing a compelling case for combining TG-1101 with ibrutinib in these hard to treat patients with high-risk CLL. We look forward to sharing these data with the FDA later this year to discuss filing for accelerated approval,” the company noted.

Other stocks to watch in the group: $INCY, $TSRO, $AZN, $AMGN

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