A Histological and Biochemical Assessment of the Cartilage Matrix Obtained from in Vitro Storage of Osteochondral Allografts
| Autor: | Fred Harwood, Judith A. Hoover, David Amiel, Marvin H. Meyers |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Cartilage
Articular Pathology medicine.medical_specialty Type II collagen Tissue Banks Cell morphology Biochemistry Glycosaminoglycan chemistry.chemical_compound Tissue culture Dogs Rheumatology Safranin medicine Animals Transplantation Homologous Orthopedics and Sports Medicine Molecular Biology Glycosaminoglycans Cartilage Metachromasia DNA Cell Biology Transplantation medicine.anatomical_structure chemistry Collagen Tissue Preservation |
| Zdroj: | Connective Tissue Research. 23:89-99 |
| ISSN: | 1607-8438 0300-8207 |
| DOI: | 10.3109/03008208909103906 |
| Popis: | Fresh osteochondral allografts were stored at 4 degrees C in tissue culture media at variable time periods (3, 7, 14 and 28 days). Sterilely dissected tibial plateaus with a standardized 1/2 cm subchondral bone "shell" were obtained from canines 1-3 hrs post mortem. X-rays were taken to determine maturity of the animals. Only mature animals (closed epiphyses) were considered for the study. Histologically, safranin 0 (metachromatic stain for glycosaminoglycans) was observed in all experimental specimens. H&E stained sections showed at all time periods of 3, 7, 14 and 28 days that the cell morphology and arrangements were similar in the superficial and deep areas of the cartilage obtained from the stored osteochondral allograft when compared to the control articular cartilage. The cells were in lacunae and arranged in clusters. Biochemically, glycosaminoglycans and collagen content showed no difference at the 95% level of confidence during the duration of the study (28 days) when compared to the 0 day control cartilage. Collagen typing, based on the assessment by HPLC of the CNBr peptides showed the major presence of type II collagen (no evidence of dedifferentiation was observed). No type I was found to be present. Some apparent variations in the proportions of minor collagen components were noted--e.g. at 14 days the cartilage appeared to contain increased amounts of type XI but little or no type IX collagen (HMW, LMW) when compared to the day 0 control. At 28 days a shift to a larger amount of type IX collagen occurs, especially in the LMW component, with a small amount of type XI collagen when compared to normal day 0 articular cartilage. Cell viability, i.e., the ability of the allograft tissue to incorporate 35SO4 in the synthesis of glycosaminoglycans, was intact up to 28 days of storage. |
| Databáze: | OpenAIRE |
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