Human BRCA1 adenoviral particles

BRCA1 (breast cancer gene 1) is located on human chromosome 17 and encodes a large multifunctional nuclear phosphoprotein that plays a key role as a tumor suppressor. BRCA1 is primarily involved in the cellular response to DNA damage, especially double-strand breaks (DSBs), and is essential for maintaining genomic integrity. It is a key coordinator of the homologous recombination (HR) DNA repair pathway, a high-fidelity mechanism that is essential for the accurate repair of DSBs. BRCA1 forms a complex with various other DNA repair proteins, such as PALB2, BARD1, and RAD51 recombinases, and acts as a scaffold to facilitate the recruitment and activation of repair machinery at the site of damage. In addition, BRCA1 is involved in other important cellular processes, including cell cycle checkpoint control, transcriptional regulation, chromatin remodeling, and centromere duplication. Germline mutations in the BRCA1 gene are strongly associated with hereditary breast cancer (usually early-onset breast cancer and triple-negative breast cancer), ovarian cancer, and prostate and pancreatic cancer. These mutations often result in truncated or loss-of-function proteins, which impair the cell''s ability to effectively repair DNA damage, leading to genomic instability and the accumulation of oncogenic mutations, ultimately leading to cancer development.

Human BRCA1 Adenoviral Particles are recombinant, replication-defective adenoviral vectors that have been genetically engineered to deliver and express the human BRCA1 gene to target cells in vitro or in vivo. These particles are produced by genetically engineering a human adenovirus (usually serotype 5, Ad5), a well-studied viral vector system. These particles are extremely valuable tools for: restoring functional BRCA1 in BRCA1 mutant or defective cell lines to study DNA repair mechanisms and tumor suppression; exploring the role of BRCA1 in various cellular pathways; evaluating potential gene therapy strategies; and testing chemosensitivity/resistance in syngeneic models.