Adsorptive stripping voltammetry of human chorionic gonadotropin and two of its specific antibodies

A critical analysis of the use of sialic acid determination in the diagnosis of malignancy

The measurement of serum sialic acid in sera from individuals with leukemia, breast, gastrointestinal, lung and bladder cancers, brucellosis and manic depression is described. The serum sialic acid levels were also examined in mice bearing Landschutz ascites tumours. The presence of sialic acid-enriched glycopeptides in serum was shown. The results indicate that while sialic acid may be significantly elevated in sera of some tumour-bearing individuals, it is not solely tumour-derived. Its application as a tumour marker is limited and requires critical analysis.

Adsorptive voltammetric investigation of the interaction of cisplatin with cystine and human serum albumin

The interaction of the anti-cancer drug cisplatin with human serum albumin and cystine has been investigated using differential pulse adsorptive voltammetry. Based on an understanding of the voltammetric behaviour of these biological molecules, which rely on the presence of the disulphide groups within their molecular structure for their electroactivity, it has been postulated that binding of cisplatin to these molecules occurs at the disulphide bond. A fractional coefficient for the binding of cisplatin to human serum albumin at pH 7.4 was calculated to be 0.32. The reactivity of hydrolysis products of cisplatin was shown to be greater than that of the parent drug.