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Related Experiment Videos

Sialyltransferase activity in tumor tissues.

P G Berge, A Wilhelm, H Schriewer

    Klinische Wochenschrift
    |April 2, 1984
    PubMed
    Summary

    Sialyltransferase (ST) enzyme activity is elevated in most tumors compared to normal tissues. While ST shows potential as a tumor marker, specific isoenzymes with higher tumor specificity are yet to be identified.

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    Area of Science:

    • Biochemistry
    • Oncology
    • Enzymology

    Background:

    • Sialyltransferase (ST) plays a role in cell surface glycosylation, which is often altered in cancer.
    • Understanding ST activity in tumor tissues is crucial for identifying potential cancer biomarkers.

    Purpose of the Study:

    • To investigate and quantify Sialyltransferase (ST) activity in tumor tissues compared to control tissues.
    • To compare the diagnostic potential of ST with other established tumor markers like lactate dehydrogenase (LDH) and creatine kinase (CK).

    Main Methods:

    • Enzyme activity assays were performed on tumor and control tissue samples.
    • Levels of ST, LDH subunits (M/H ratio), CK subunits (B/M ratio), and Regan isoenzyme of alkaline phosphatase (AP) were determined.
    • Statistical analysis, including distribution functions, was used to compare enzyme activities.

    Main Results:

    • Sialyltransferase (ST) activity was elevated in 74% of tumors, with an average increase of 2.1-fold compared to normal counterparts.
    • Lactate dehydrogenase (LDH) M/H subunit ratio increased in 75% of tumors (average 1.3-fold).
    • Creatine kinase (CK) B/M subunit ratio decreased in 56% of tumors (average 0.8-fold), and Regan isoenzyme of alkaline phosphatase (AP) was found in 13% of tumors.

    Conclusions:

    • Sialyltransferase (ST) exhibits increased activity in a majority of tumors, suggesting its potential as a tumor marker.
    • While ST shows promise, further research is needed to identify specific isoenzymes with higher tumor specificity.
    • Comparison with other markers indicates varying frequencies and average changes for LDH and CK in tumors.

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