On October 8, 2018 Adaptimmune Therapeutics plc ("Adaptimmune") (Nasdaq: ADAP), a leader in T-cell therapy to treat cancer, reported further details about two poster presentations at the upcoming ESMO (Free ESMO Whitepaper) congress, as follows (Press release, Adaptimmune, OCT 8, 2018, View Source;p=RssLanding&cat=news&id=2370701 [SID1234530171]):

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MAGE-A10 poster for discussion presentation details:

A late-breaking abstract with data from the two ongoing MAGE-A10 studies ("triple tumor" and lung) was accepted for poster discussion, with the full abstract and data to be made available at the time of presentation.
Title: Safety and Anti-Tumor Effects of MAGE-A10c796TCR T-cells in Two Clinical Trials (Poster #LBA38)
Poster discussion session: Immuno 1 in ICM room 14b
Time: Saturday, October 20 from 16:45 to 17:45 CEST (10:45 to 11:45 EDT)
MAGE-A4 poster presentation details:

The full abstract for the MAGE-A4 poster is now available online (https://bit.ly/2NMBC3d) and is summarized below
Title: Initial Safety Assessment of MAGE-A4 SPEAR T-cells (Poster #1156P)
Poster display session (ID 259): Immunotherapy of cancer in Hall A3 poster networking Hub
Time: Saturday, October 20 from 12:30 to 13:30 CEST (06:30 to 07:30 EDT)
Brief summary of abstract (data cut-off 25 April 2018):
Background:

Ongoing study (NCT03132922) to evaluate safety and tolerability of SPEAR T-cells directed towards a MAGE-A4 peptide expressed on tumors in the context of HLA-A*02
Methods:

Modified 3+3 design
Patients have inoperable or metastatic (advanced) non-small cell lung cancer (NSCLC), urothelial ("bladder"), melanoma, synovial sarcoma, myxoid/round cell liposarcoma (MRCLS), head & neck, ovarian, gastric, or esophageal cancers expressing MAGE-A4
Lymphodepletion regimen:
Cohorts 1, 2: [fludarabine (Flu) 30 mg/m2/day and cyclophosphamide (Cy) 600 mg/m2/day] x 3 days
Cohort 3: [Flu 30 mg/m2/day] x 4 days + [Cy 600 mg/m2/day] x 3 days
Expansion Cohort: [Flu 30 mg/m2/day] x 4 days + [Cy 600 mg/m2/day] x 3 days
Dose:
Cohort 1: target 100 million (M) transduced cells; range 80 to 120 M transduced cells
Cohort 2: target 1 billion (B) transduced cells; range 0.5 to 1.2 B transduced cells
Cohort 3: target 5 B transduced cells; range 1.2 to 6.2 B transduced cells
Expansion Cohort: target 5 B transduced cells; range 1.2 to 10 B transduced cells
Results:

Three patients were treated with 100 M MAGE-A4 SPEAR T-cells, and transduced cells were detectable in peripheral blood
Adverse events (AEs) for the first 2 patients reported at grade (G) ≥3 included anemia, hypoglycemia, hyponatremia, lymphopenia, neutropenia, and thrombocytopenia
Serious AEs included G4 hyponatremia, G3 atrial fibrillation, G3 syncope (unrelated to T-cell therapy), G1 CRS and G2 encephalopathy syndrome (both related), and G2 generalized muscle weakness (possibly related)
None of the events were considered dose limiting toxicities (DLTs) by the Safety Review Committee
Conclusions:

MAGE-A4 SPEAR T-cells at the 100 M transduced cell dose appear to show no evidence of on‑target or off-target toxicity
Preliminary data support continued investigation of the T-cell receptor (TCR), and this trial is ongoing