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  • Title: Immunocytochemical localisation of katacalcin, a calcium-lowering hormone cleaved from the human calcitonin precursor.
    Author: Ali-Rachedi A, Varndell IM, Facer P, Hillyard CJ, Craig RK, MacIntyre I, Polak JM.
    Journal: J Clin Endocrinol Metab; 1983 Sep; 57(3):680-2. PubMed ID: 6348069.
    Abstract:
    Katacalcin is a newly discovered calcium-lowering hormone predicted from the nucleotide sequence of a cloned cDNA derived from human calcitonin mRNA. The aim of the study was to localise katacalcin by immunocytochemistry at both light and electron microscope levels. Antisera to synthetic katacalcin and calcitonin were used to investigate 8 cases of medullary thyroid carcinoma and 6 normal human thyroids (3 adult and 3 fetal). We have been able to demonstrate the co-localisation of these peptides in normal and neoplastic C-cells in all cases studied. Our results suggest that peptide sequences predicted by recombinant DNA technology can be localised using immunocytochemistry and that the combination of these techniques may have applications in diagnostic pathology.
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