[Construction of cyclin D1 recombinant plasmids and its expression in human nasopharyngeal carcinoma cells].

Objective: To construct the eukaryotic expression vectors of human cyclin D1 gene and express them in poorly differentiated nasopharyngeal carcinoma cells (CNE-2Z cells).

Methods: The full-length cyclin D1 was cloned from CNE-2Z cells by RT-PCR. The cDNA fragments were inserted into pIRES2-EGFP plasmids and pEGFP-C2 plasmids and confirmed by restriction enzyme digestion, PCR and sequencing.

[Ca(2+)-dependent potassium channels play important roles in regulatory volume decrease in human nasopharyngeal carcinoma cells].

It has been shown that cell volume regulation mechanisms play important roles in various cell functions. We demonstrated previously that volume-activated chloride channels were involved in cell volume regulation. The present study aimed to clarify the roles of various types of potassium channels in regulatory volume decrease (RVD) induced by hypotonic challenges in human nasopharyngeal carcinoma cells (CNE-2Z cells).