TRESK potassium channel in human T lymphoblasts.
Dénison Selene Sánchez-Miguel1, Fernando García-Dolores, María Rosa Flores-Márquez
1Center for Biomedical Research, University of Colima, Av. 25 de Julio 965, Villa San Sebastian, C.P. 28045 Colima, Mexico.
Biochemical and Biophysical Research Communications
|April 2, 2013
Summary
The TRESK (TWIK-related spinal cord K(+)) channel, encoded by the KCNK18 gene, is found in T lymphoblastic cells, not healthy lymphocytes. This channel
Area of Science:
- Molecular Biology
- Immunology
- Channelopathies
Background:
- The TRESK (TWIK-related spinal cord K(+)) channel, encoded by the KCNK18 gene, is a member of the double-pore domain K(+) channel family.
- TRESK is primarily expressed in the central nervous system under normal conditions.
- Previous studies identified a TRESK-like K(+) channel in Jurkat T lymphoblasts.
Purpose of the Study:
- To investigate the presence and localization of the TRESK channel in T lymphoblastic cell lines and clinical samples.
- To explore the potential role of TRESK in lymphocyte proliferation and tumorigenesis.
Main Methods:
- RT-PCR to detect KCNK18 mRNA.
- Immunohistochemistry and immunofluorescence to detect TRESK protein.
- Analysis of T lymphoblastic cell lines (Jurkat, JCaM, H9), normal lymph nodes, and T acute lymphoblastic leukemia/lymphoma samples.
Main Results:
- KCNK18 mRNA was detected in T lymphoblastic cell lines but absent in resting peripheral blood lymphocytes.
- TRESK protein expression was confirmed in lymphoblastic cell lines, germinal centers of lymph nodes, and leukemia/lymphoma samples.
- TRESK was localized to both the plasma membrane and intracellular compartments.
Conclusions:
- The TRESK channel is expressed in T lymphoblastic cells and associated with T cell malignancies.
- TRESK may play a role in lymphocyte proliferation and the development of T cell tumors.
- Further research is warranted to elucidate the specific functions of TRESK in these contexts.
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