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Related Experiment Videos

Platelet immunoregulatory factors.

M L Tykocinski1, N Xiong, D M Morrow

  • 1Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106-4943, USA.

Stem Cells (Dayton, Ohio)
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Platelets modulate immune cells via placental protein 14 (PP14), a protein previously found in the endometrium. Hematopoietic PP14 exhibits immunosuppressive properties, linking the coagulation and immune systems.

Area of Science:

  • Immunology
  • Hematology
  • Molecular Biology

Background:

  • Platelet-leukocyte interactions are mediated by various proteins.
  • Platelet-derived factors like TGF-β, IL-1, and PF4 are well-studied.
  • A novel leukocyte-modulatory protein has been identified in platelets.

Purpose of the Study:

  • To investigate the role of placental protein 14 (PP14) in hematopoietic cells.
  • To evaluate the leukocyte modulatory activity of PP14 derived from megakaryocytes.
  • To analyze alternatively spliced PP14 mRNA variants and their protein products.

Main Methods:

  • Two-way mixed lymphocyte cultures to assess immunosuppressive properties.
  • Cloning of two alternatively spliced hematopoietic PP14 mRNA variants.

Related Experiment Videos

  • Cell-free translation and transfection analyses to study protein translatability and glycosylation.

    • Main Results:

    • Hematopoietic PP14, derived from megakaryocytic cells, demonstrates immunosuppressive activity.
    • Two distinct PP14 mRNA splice variants were identified and cloned.
    • Both PP14 mRNA species are translatable, and their glycosylation properties were analyzed.

    Conclusions:

    • Placental protein 14 (PP14) possesses significant leukocyte modulatory functions.
    • Hematopoietic PP14 contributes to the link between the coagulation and immune systems.
    • PP14, a lipocalin superfamily member, offers new insights into cell cross-talk.