カンノ　ヒトシ   KAN'NO Hitoshi   菅野　仁    所属   医学部 医学科    職種   特任教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Glycolytic inhibition by mutation of pyruvate kinase gene increases oxidative stress and causes apoptosis of a pyruvate kinase deficient cell line.
掲載誌名	正式名：Experimental hematology 略　 称：Exp Hematol ISSNコード：0301-472X(Print)0301-472X(Linking)
巻・号・頁	35(8),pp.1190-200
著者・共著者	Aisaki Ken-ichi, Aizawa Shin, Fujii Hisaichi, Kanno Jun, Kanno Hitoshi
担当区分	最終著者,責任著者
発行年月	2007/08
概要	OBJECTIVE:SLC3 is a Friend erythroleukemic cell line established from the Pk-1(slc) mouse, a mouse model of red blood cell type-pyruvate kinase (R-PK) deficiency. This study was aimed to elucidate the mechanisms attributing to apoptosis induced by R-PK deficiency.MATERIALS AND METHODS:SLC3 and a control Friend cell line, CBA2, were cultured in a condition of glucose deprivation or supplementation with 2-deoxyglucose, and apoptosis was detected by annexin V. We established two stable transfectants of SLC3 cells with human R-PK cDNA, and examined the effect of R-PK on an apoptotic feature by cell cycle analysis. Intracellular oxidation was measured with 2',7'-dichlorofluorescin diacetate. DNA microarray analysis was performed to examine gene-expression profiles between the two transfectants and parental SLC3.RESULTS:SLC3 was more susceptible than CBA2 to apoptosis induced by glycolytic inhibition. The forced expression of R-PK significantly decreased cells at the sub G0/G1 stage in an expression-level dependent manner. Microarray analysis showed that proapoptotic genes, such as Bad, Bnip3, and Bnip3l, were downregulated in the transfectants. In addition, peroxiredoxin 1 (Prdx1) and other antioxidant genes, such as Cat, Txnrd1, and Glrx1 were also downregulated. A siRESULTS:gnificant decrease of dichlorofluorescein fluorescence was observed by R-PK expression. Preincubation with a glutathione precursor showed a significant decrease of apoptosis.CONCLUSION:These results indicated that glycolytic inhibition by R-PK gene mutation augmented oxidative stress in the Friend erythroleukemia cell, leading to activation of hypoxia-inducible factor-1 as well as downstream proapoptotic gene expression. Thus, R-PK plays an important role as an antioxidant during erythroid differentiation.
DOI	10.1016/j.exphem.2007.05.005
文献番号	17662887