Immix Biopharma, Inc. ("ImmixBio", "Company", "We" or "Us", "IMMX") (Nasdaq: IMMX), a clinical-stage biopharmaceutical company trailblazing cell therapies in AL Amyloidosis and autoimmune disease, reported that the 1st patient has been dosed at MSKCC in its U.S. NEXICART-2 trial with NXC-201, a sterically-optimized BCMA-targeted CAR-T cell therapy (Press release, Immix Biopharma, JUL 8, 2024, View Source [SID1234644712]).

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The NEXICART-2 study is intended to evaluate the safety and efficacy of NXC-201 in relapsed/refractory AL Amyloidosis patients with adequate cardiac function who have not been exposed to prior BCMA-targeted therapy. The study builds on positive data from the initial ex-U.S. study, NEXICART-1, presented at the 27th Annual Meeting of The American Society of Gene and Cell Therapy (ASGCT 2024) which showed a 92% overall response rate in relapsed/refractory AL Amyloidosis patients (12/13). The best responder experienced a 28.0 month duration of response (as reported May 10, 2024, with ongoing follow-up).

"I am excited to initiate the only CAR-T clinical trial currently recruiting for AL Amyloidosis patients that have progressed on front-line daratumumab (DARZALEX)-combination therapy," said Heather Landau, MD, Memorial Sloan Kettering Cancer Center Amyloidosis Program Director and NEXICART-2 principal study investigator. "A one-time therapy such as NXC-201 would provide an attractive option for AL Amyloidosis patients and clinicians. There are no approved drugs for relapsed/refractory AL Amyloidosis today."

"We believe initiation of the U.S. NEXICART-2 study is an important advancement in AL Amyloidosis. NXC-201 has the potential to become a first-in-class safe and durably-effective therapy for patients with relapsed/refractory AL Amyloidosis. We are humbled by the enthusiasm across the U.S. AL Amyloidosis community and look forward to robust enrollment for NEXICART-2," said Ilya Rachman, M.D., Ph.D., Chief Executive Officer of Immix Biopharma. Gabriel Morris, Chief Financial Officer of Immix Biopharma, added, "Dosing of the first patient in line with our mid-2024 guidance is a testament to the stellar execution of our extraordinary team and partners."

NXC-201 is the only CAR-T therapy currently in development in AL Amyloidosis, mentioned in a review article entitled "Systemic Light Chain Amyloidosis" published in June, 2024 New England Journal of Medicine.

About NEXICART-2
NEXICART-2 (NCT06097832) is an open-label, single-arm, multi-site U.S. Phase 1b/2 dose expansion clinical trial of CAR-T NXC-201 in relapsed/refractory AL Amyloidosis. NEXICART-2 is expected to enroll 40 patients with adequate cardiac function who have not been exposed to prior BCMA-targeted therapy. The study is designed with a standard 6 patient safety-run in to evaluate two doses (three patients each at 150 million CAR+T cells and 450 million CAR+T cells), with the potential for further escalation to 800 million CAR+T cells (all 3 dose levels were evaluated in the NEXICART-1 study and have produced complete responses in relapsed/refractory AL Amyloidosis patients). The study aims to evaluate the safety and efficacy of NXC-201 in this patient population. Primary endpoints are complete response rate and overall response rate, according to consensus recommendations (Palladini et al. 2012).

About NEXICART-1
NEXICART-1 (NCT04720313) is an open-label, ex-U.S. Phase 1b/2a clinical trial of NXC-201 (formerly HBI0101) in patients with relapsed/refractory multiple myeloma and relapsed/refractory AL amyloidosis (including AL Amyloidosis patients with impaired cardiac function and including AL Amyloidosis patients exposed to prior BCMA-targeted therapy). The primary objective of the study is to characterize the safety and efficacy, as well as confirm the recommended Phase 2 dose (RP2D) of NXC-201 (which has already been confirmed). NEXICART-1 clinical results, most recently from ASGCT (Free ASGCT Whitepaper) 2024, are available at View Source

About NXC-201
NXC-201 is a sterically-optimized BCMA-targeted chimeric antigen receptor T (CAR-T) cell therapy. Initial data from Phase 1b/2a ex-U.S. study NEXICART-1 has demonstrated short duration of cytokine release syndrome (CRS) and no grade 3 or delayed neurotoxicity in high-volume disease, as well as short duration CRS and no neurotoxicity of any kind in AL Amyloidosis.

NXC-201 is being studied in a comprehensive clinical development program for the treatment of patients with relapsed/refractory AL amyloidosis, with the potential to expand into autoimmune indications. The NXC-201 NEXICART-2 U.S. clinical trial builds on a robust clinical dataset. NXC-201 has been awarded Orphan Drug Designation (ODD) in the US by the FDA and in the EU by the EMA in AL Amyloidosis.

About AL Amyloidosis
AL amyloidosis is caused by abnormal plasma cells in the bone marrow, which produce misfolded amyloid proteins that build-up in the heart, kidney, liver, and other organs. This build-up causes progressive and widespread damage to multiple organs, including heart failure, and leads to high mortality rates.

The U.S. observed prevalence of relapsed/refractory AL Amyloidosis is estimated to be growing at 12% per year according to Staron, et al Blood Cancer Journal, to approximately 33,277 patients in 2024.

The Amyloidosis market was $3.6 billion in 2017, and is expected to reach $6 billion in 2025, according to Grand View Research.