Possible Role of Tamm‐Horsfall Glycoprotein in Calcium Oxalate Crystallisation

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Abstract
Summary— The role of Tamm‐Horsfall glycoprotein (THGP) in the crystallisation of calcium oxalate was investigated. The results showed THGP to have a weak inhibitory effect on crystal growth. In contrast, urinary macromolecules showed a strong inhibitory effect. THGP should, therefore, not be considered the main component of urinary macromolecules which have a strong inhibitory effect on crystal growth. However, THGP did enhance crystal production in the early phase of crystallisation. It appears that THGP should be viewed as a promoter rather than an inhibitor of calcium oxalate crystallisation at physiological concentrations.