Cartilage-specific deficiency represses IGF-1 and enhances osteoarthritis severity in mice.

Objectives: Prior studies noted that chondrocyte SIRT6 activity is repressed in older chondrocytes rendering cells susceptible to catabolic signalling events implicated in osteoarthritis (OA). This study aimed to define the effect of deficiency on the development of post-traumatic and age-associated OA in mice.

Methods: Male cartilage-specific -deficient mice and intact controls underwent destabilisation of the medial meniscus (DMM) or sham surgery at 16 weeks of age and OA severity was analysed at 6 and 10 weeks postsurgery.

Corrigendum: The cGAS-STING pathway affects vertebral bone but does not promote intervertebral disc cell senescence or degeneration.

[This corrects the article DOI: 10.3389/fimmu.2022.

The cGAS-STING Pathway Affects Vertebral Bone but Does Not Promote Intervertebral Disc Cell Senescence or Degeneration.

The DNA-sensing cGAS-STING pathway promotes the senescence-associated secretory phenotype (SASP) and mediates type-I interferon inflammatory responses to foreign viral and bacterial DNA as well as self-DNA. Studies of the intervertebral disc in humans and mice demonstrate associations between aging, increased cell senescence, and disc degeneration. Herein we assessed the role of STING in SASP promotion in STING gain- (N153S) and loss-of-function mouse models.