The Xenogeneic Viral Vector Theory: A Critical Review of Zoonotic Oncogenesis via Bovine and Porcine Tissue Consumption

Title The Xenogeneic Viral Vector Theory: Mechanisms of Bovine Leukemia Virus Zoonosis via Dietary Neu5Gc Incorporation Abstract This monograph presents the Xenogeneic Viral Vector Theory, a novel oncogenic hypothesis proposing that specific bovine retroviruses—specifically Bovine Leukemia Virus (BLV)—exploit the metabolic incorporation of non-human sialic acids to bypass species barriers. While BLV is widely endemic in global dairy herds, its capacity to infect human cells has historically been debated. We propose a "two-hit" mechanism driven by dietary habits. First, the chronic consumption of red meat leads to the metabolic accumulation of N-glycolylneuraminic acid (Neu5Gc)—a foreign sugar—onto the surface of human epithelial cells, effectively "painting" them with bovine-like receptors. Second, this accumulation creates a molecular "lock," or Neu5Gc Gateway, which allows BLV viral particles present in meat and dairy products to bind with high affinity, enter the cell, and potentially integrate into the human genome. This work aims to bridge the gap between nutritional epidemiology and molecular virology, offering new perspectives on the correlation between processed meat consumption and the incidence of breast and colorectal cancers. Keywords Bovine Leukemia Virus, BLV, Neu5Gc, Zoonosis, Viral Oncology, Breast Cancer, Molecular Pathology, Xenogeneic Sialitis, Retrovirus, Food Safety