OBJECTIVETo investigate the effect of a novel LMNA gene mutation E82K found in a Chinese family with dilated cardiomyopathy on cell cycle of HEK293 cells.

METHODS(1) Human wild type full-length LMNA gene cDNA was subcloned into eukaryotic expression vector pTracer-CMV and point mutation was introduced into the cDNA. LMNA gene wild type and mutant E82K LMNA gene were transfected into HEK293 cells respectively and stable cell lines resistant to antibiotic were obtained 4 weeks later. (2) Cell cycle changes were analyzed by flow cytometry in HEK293 cells transfected with wild type and mutant E82K LMNA gene and empty vector in the presence of 0.8 mmol/L H(2)O(2).

RESULTSCell circle was arrested at G0/G1 phase in the cells transfected with mutated E82K LMNA gene and at G2/M phase in other cell groups in the presence of H(2)O(2).

CONCLUSIONCell circle was arrested at G0/G1 phase in the cells transfected with E82K LMNA gene in the presence of H(2)O(2) in HEK293 cells.