Summary
Glomerular basement membrane thickening is thought to be due to increased collagen synthesis and abnormal cross linking. Based upon the observation that the incorporation of distinct proline analogues leads to increased degradation of the newly abnormally formed collagen we administered cis 3 hydroxyproline orally to streptozotocin diabetic rats.
Measuring glomerular basement membrane thickness we found in the treated group significantly lower values. The solubility of collagen in the treated group was significantly increased, indicating the mechanism of action of the proline analogue. The collagen content of kidneys in the treated group was reduced as well correlating with the basement membrane thickness. Provided the absence of toxicity of cis 3 hydroxyproline its pharmaceutical use for the inhibition of basement membrane proliferation seems promising.
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Lubec, B., Sternberg, M., Mallinger, R. et al. Cis 3 hydroxyproline reduces glomerular basement membrane thickness and collagen type IV synthesis in diabetic rats. Amino Acids 4, 249–254 (1993). https://doi.org/10.1007/BF00805826
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DOI: https://doi.org/10.1007/BF00805826