Notably, lumbar discs of 20-month-old mice showed a milder phenotype compared to caudal discs; there was a higher proportion of lumbar discs with NP and AF compartments scoring grade 4 but when scores of all discs were averaged it did not reach statistical significance (Fig.
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The loss of OPA1 accelerates intervertebral disc degeneration and osteoarthritis in aged mice.
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