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Calcium pump expression in human bone and soft tissue tumours

M Kuroda1, H Horiuchi, T Oka

  • 1Department of Pathology, Faculty of Medicine, University of Tokyo, Japan.

Virchows Archiv. A, Pathological Anatomy and Histopathology
|January 1, 1993
PubMed
Summary

This study investigated calcium pump expression in human bone and soft tissue tumors using a novel monoclonal antibody. While effective for myogenic tumors, the antibody also showed broader reactivity, suggesting calcium

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Area of Science:

  • Oncology
  • Biochemistry
  • Immunohistochemistry

Background:

  • Calcium pumps, specifically sarcoplasmic reticulum calcium-ATPase (SERCA), are crucial for regulating intracellular calcium levels.
  • Dysregulation of intracellular calcium is implicated in various cellular processes, including proliferation and differentiation, and may play a role in tumorigenesis.

Purpose of the Study:

  • To investigate the expression of calcium pumps in a cohort of human bone and soft tissue tumors.
  • To evaluate the utility of a novel monoclonal antibody against sarcoplasmic reticulum calcium-ATPase (mAb6F5) as a potential diagnostic marker.

Main Methods:

  • Streptavidin-biotin immunohistochemical staining was employed.
  • A monoclonal antibody against sarcoplasmic reticulum calcium-ATPase (mAb6F5) was used to detect calcium pump expression.

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  • Ninety-one cases of human bone and soft tissue tumors were analyzed.

    • Main Results:

    • mAb6F5 demonstrated positive staining in specific myogenic tumors, including embryonal rhabdomyosarcoma.
    • The antibody also exhibited positive immunoreactivity in non-myogenic tumors such as chordoma, chondrosarcoma, and synovial sarcoma.
    • Positive expression of the calcium pump was observed in 2/5 embryonal rhabdomyosarcoma, 1/5 biphasic synovial sarcoma, 4/4 chordoma, and 3/3 chondrosarcoma cases.

    Conclusions:

    • The monoclonal antibody mAb6F5 shows promise as a marker for myogenic tumors.
    • The broader immunoreactivity of mAb6F5 in other tumor types suggests a wider role for calcium pumps beyond myogenic differentiation.
    • These findings highlight the potential significance of intracellular calcium in tumor cell proliferation and differentiation.