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PubMed2002

Spinal degenerative disk disease (DDD) in female macaque monkeys: epidemiology and comparison with women.

Spinal degenerative disk disease (DDD) in a radiographic, cross-sectional sample of 192 female macaque monkeys, approximately 5-30 years old, is described. The presence and extent of disk space narrowing (DSN) and anterior osteophytosis were assessed with reference to age, average lifetime body mass. and distribution within the thoracolumbar spine. Age was a strong correlate of disk narrowing and osteophytosis, with early signs appearing at equivalent ages in both species and increasing in prevalence thereafter. Macaques showed a far greater prevalence of DDD, especially in the oldest age group, than has been reported in the human data. Body mass was associated with disk narrowing in the macaque, but not with osteophytosis. The two species differed little in the pattern of distribution of DDD along the spine. Our results suggest that bipedality is not the singular, or even the most important, biomechanical factor in the development of human DDD. Rather, others shared postural regimes, e.g., sitting, may be responsible for the onset and progression of DDD in both species. The macaque model could substantially add to the understanding and, potentially, treatment of this oftentimes debilitating condition.

Age Distribution↗
PubMed1986

Experimental arthritis in a nonhuman primate. I. Induction by bovine type II collagen.

Six squirrel monkeys immunized with native fetal bovine type II collagen (CII) in complete Freund's adjuvant developed arthritis 3 to 6 weeks later. None of three cebus monkeys given CII plus complete Freund's adjuvant or three control squirrel monkeys immunized with complete Freund's adjuvant alone developed arthritis. In four of the squirrel monkeys, arthritis was symmetrical and involved mainly the interphalangeal and metacarpal phalangeal joints. Two other monkeys had pauciarticular disease. Although three monkeys became cachetic and died, the others regained weight and their arthritis spontaneously remitted with minor residual deformities in digits and larger joints. Each squirrel monkey with arthritis had high titers of CII antibodies whereas the arthritis-resistant cebus monkeys had lower titers of CII antibodies whereas the arthritis-resistant cebus monkeys had lower titers of CII antibodies. As an animal model, experimentally induced arthritis in primates appears to resemble an acute arthropathy in man rather than chronic rheumatoid arthritis.

Acute Disease↗