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P2Y purinergic receptors regulate the growth of human melanomas

Nicholas White1, Mina Ryten, Elizabeth Clayton

  • 1Autonomic Neuroscience Institute, Royal Free and University College Medical School, Rowland Hill Street, London NW3 2PF, UK.

Cancer Letters
|May 25, 2005
PubMed

Insights

Extracellular messengers like adenosine triphosphate (ATP) affect melanoma growth via P2Y receptors. P2Y1 receptor activation inhibits melanoma cell proliferation, suggesting it as a therapeutic target.

Area of Science:

  • Oncology
  • Cell Biology
  • Pharmacology

Background:

  • Adenosine 5'-triphosphate (ATP) acts as an extracellular messenger through cell surface receptors.
  • P2Y receptor subtypes modulate critical cellular functions including proliferation, differentiation, and apoptosis.

Purpose of the Study:

  • To investigate the functional expression and proliferative effects of metabotropic P2Y receptors in human melanoma.
  • To identify potential therapeutic targets for melanoma treatment.

Main Methods:

  • Reverse transcriptase polymerase chain reaction (RT-PCR) and immunohistochemistry were used to confirm receptor expression.
  • Intracellular calcium measurements were performed using a Fluorometric Imaging Plate Reader (FLIPR).
  • A375 melanoma cells were treated with selective P2Y receptor agonists.

Main Results:

  • Functional expression of P2Y1, P2Y2, and P2Y6 receptor subtypes was confirmed in human melanoma tissue and cells.
  • Activation of the P2Y1 receptor by 2-methylthioadenosine-5-diphosphate decreased melanoma cell number in a dose-dependent manner.
  • Activation of the P2Y2 receptor by uridine triphosphate increased melanoma cell number in a dose-dependent manner.

Conclusions:

  • Extracellular nucleotides acting on P2Y receptors mediate melanoma cell growth.
  • The P2Y1 receptor represents a potential therapeutic target for melanoma treatment.

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