X4 Pharmaceuticals
X4 Pharmaceuticals, Inc. is a clinical-stage biopharmaceutical company based in Cambridge, Massachusetts, specializing in the discovery and development of innovative therapeutics for primary immune deficiencies and cancer. The company's lead drug candidate, mavorixafor, is an oral small molecule antagonist of the chemokine receptor CXCR4, currently undergoing multiple clinical trials. These include a Phase III trial for patients with warts, hypogammaglobulinemia, infections, and myelokathexis syndrome, as well as Phase Ib and Phase IIa trials focused on severe congenital neutropenia and clear cell renal cell carcinoma, respectively. In addition, X4 Pharmaceuticals is advancing X4P-002, targeting glioblastoma multiforme, and X4P-003 aimed at primary immune deficiencies. The company has also established a license agreement with Abbisko Therapeutics to develop mavorixafor in combination with checkpoint inhibitors for oncology applications. Founded in 2014, X4 Pharmaceuticals was previously known as Arsanis, Inc. before rebranding in March 2019.
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Arsanis
Acquisition in 2019
Arsanis, Inc. is a clinical-stage biopharmaceutical company headquartered in Waltham, Massachusetts, specializing in monoclonal antibody (mAb) immunotherapies for serious infectious diseases. Founded in 2010, Arsanis focuses on developing innovative therapies targeting various bacterial and viral pathogens. Its lead clinical program, ASN100, is currently in a Phase 2 trial aimed at preventing Staphylococcus aureus pneumonia in high-risk, mechanically ventilated patients. The company's preclinical pipeline includes mAbs directed against respiratory syncytial virus and Gram-negative bacteria, such as Klebsiella pneumoniae and Escherichia coli. Arsanis leverages advanced mAb discovery techniques to create a diverse range of therapeutic candidates with multiple mechanisms of action, addressing the urgent need for effective treatments in infectious disease management. The company also has research and preclinical development operations in Vienna, Austria, under Arsanis Biosciences GmbH.
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