ADAM29 (ADAM metallopeptidase domain 29) is a type I integral membrane protein that functions as a non-catalytic metalloprotease-like protein with primary roles in reproductive biology and pathological processes. The gene is mapped to chromosome 4.2-qter and shows highly specific expression in testis tissues 1. In normal physiology, ADAM29 is involved in spermatogenesis and fertilization, with immunohistochemical analysis revealing its expression across different stages of spermatogenesis and in interstitial cells 2. The protein contains a potential fusion domain and may participate in signal transduction during testis-associated cell maturation 2. However, ADAM29 has emerged as a significant oncogene across multiple cancer types. It is frequently upregulated in esophageal squamous cell carcinoma, where it represents one of eight significantly mutated genes 3. In breast cancer, increased ADAM29 expression correlates with enhanced proliferation, migration, and invasion of cancer cells 4. Similar oncogenic functions are observed in clear cell renal cell carcinoma and gastric cancer, where high ADAM29 expression associates with poor prognosis and promotes tumor growth through regulation of proliferation-related proteins (Cyclin D1, PCNA) and invasion-related proteins (MMP9, Snail) 56. Additionally, ADAM29 expression serves as a prognostic marker in chr4 lymphocytic leukemia 7 and may influence age at onset in amyotrophic lateral sclerosis 8.