EXHIBIT 99.1 Cellectis Announces Poster Presentation on TALEN®-edited MUC1 CAR T-cells Targeting Triple Negative Breast Cancer at the American Association of Cancer Research (AACR) Annual Meeting NEW YORK, March 14, 2023 (GLOBE NEWSWIRE) -- Cellectis (the “Company”) (Euronext Growth: ALCLS - NASDAQ: CLLS), a clinical-stage biotechnology company using its pioneering gene-editing platform to develop life-saving cell and gene therapies, today announced that preclinical data exploring purposeful armoring of CAR ...