The influence of serum, glucose and oxygen on intervertebral disc cell growth in vitro: implications for degenerative disc disease.

Arthritis Research & Therapy
William E JohnsonSally Roberts

Abstract

The avascular nature of the human intervertebral disc (IVD) is thought to play a major role in disc pathophysiology by limiting nutrient supply to resident IVD cells. In the human IVD, the central IVD cells at maturity are normally chondrocytic in phenotype. However, abnormal cell phenotypes have been associated with degenerative disc diseases, including cell proliferation and cluster formation, cell death, stellate morphologies, and cell senescence. Therefore, we have examined the relative influence of possible blood-borne factors on the growth characteristics of IVD cells in vitro. Bovine IVD cells were cultured either in monolayer to encourage cell proliferation or in alginate to induce chondrocytic differentiation. In both culture systems, cells were maintained with or without 20% serum, with or without 320 mg/dL glucose, and in atmospheric levels (~21%) of oxygen or 1% oxygen. Cell proliferation and viability, cell senescence, and collagen immunopositivity were assessed after 7 days. Statistical differences in these growth characteristics were tested using nonparametric analyses (n = 4 samples). In both culture systems, serum deprivation significantly inhibited IVD cell proliferation and increased cell positivity for senes...Continue Reading

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Methods Mentioned

BETA
FCS
fluorescence microscopy

Software Mentioned

IP Lab

Related Concepts

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