Expression of melatonin MT(1) and MT(2) receptors, and ROR alpha(1) receptor in transplantable murine Colon 38 cancer - PubMed (original) (raw)
. 2002 Apr:23 Suppl 1:55-60.
Affiliations
- PMID: 12019353
Expression of melatonin MT(1) and MT(2) receptors, and ROR alpha(1) receptor in transplantable murine Colon 38 cancer
Michal Karasek et al. Neuro Endocrinol Lett. 2002 Apr.
Abstract
Objectives: There are some data suggesting that melatonin exerts oncostatic action through membrane as well as nuclear receptors. In previous studies we demonstrated the antiproliferative and proapoptotic action of melatonin on transplantable murine Colon 38 adenocarcinoma cells. Therefore, the aim of the present study was to determine whether the membrane melatonin receptors MT(1) and MT(2) as well as the nuclear receptor RZR/ROR alpha are expressed in Colon 38 cells.
Material and methods: Adult male B6D2F1 mice were used in this experiment. The induction of tumor was conducted by subcutaneous injection of 0.2 mL of a 33% suspension of Colon 38 cancer cells into axillary region. Expression of mRNA encoding MT(1) and MT(2) melatonin membrane receptors was studied by RT-PCR analysis, and expression of ROR alpha(1) nuclear receptor protein was studied by Western blot analysis.
Results: The expression of mRNA encoding both MT(1) and MT(2) melatonin receptors was demonstrated in Colon 38 cancer cells. Moreover, immunodetection revealed the expression of MT(1) and ROR alpha(1) proteins in these cells.
Conclusions: Our studies on Colon 38 adenocarcinoma cells support the concept that both membrane and nuclear receptors are involved in the oncostatic action of melatonin.
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