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Updated: May 5, 2026
Surgical Retrieval, Isolation and In vitro Expansion of Human Anterior Cruciate Ligament-derived Cells for Tissue Engineering Applications
Published on: April 30, 2014
COL12A1 rs970547 Polymorphism Predisposes Anterior Cruciate Ligament Injury by Inducing ER Stress and Impairing
Wenchuan Zhao1,2, Hong Chen1,2, Junwei Wang1
1Department of Sports Medicine, The Affiliated Calmette Hospital of Kunming Medical University, Kunming, Yunnan, China.
Abstract:
COL12A1 SNPs are linked to ACL injury risk, but functional effects are unknown. We examined COL12A1 rs970547 genotype distribution in Chinese male ACL injury patients versus controls, and its impact on collagen homeostasis and fibroblast function. ACL-derived fibroblasts with rs970547(A/A) or (A/G) were obtained from patients and controls. Collagen synthesis, COL12A1 protein stability, and ER stress were assessed. The (A/A) genotype was over-represented in ACL patients. It reduced COL12A1 protein levels via destabilization, while increasing total collagen synthesis. This was associated with ER stress induction. Inhibiting ER stress rescued the functional phenotype of (A/A) fibroblasts. COL12A1 rs970547(A/A) disrupts collagen regulation and triggers ER stress, functionally impairing ACL fibroblasts and potentially elevating ACL injury risk.
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