ELIZA

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856246 occurrences (No.4 in the rank) during 5 years in the PubMed. [no cache] 500 found

322) We investigated the effect of HA on the regulation of endothelial nitric oxide (NO) synthase (eNOS) in human umbilical vein endothelial cells (HUVECs) to evaluate the involvement of eNOS and related factors in peripheral vascular impairment with HA exposure.

--- ABSTRACT ---

PMID:23836447 DOI:10.1002/tox.21888

2015 Environmental toxicology

* Humic acid induces the endothelial nitric oxide synthase phosphorylation at Ser1177 and Thr495 Via Hsp90α and Hsp90β upregulation in human umbilical vein endothelial cells.

- Humic acid (HA) has been implicated as a contributory factor for blackfoot disease, which is an endemic peripheral vascular disease. We investigated the effect of HA on the regulation of endothelial nitric oxide (NO) synthase (eNOS) in human umbilical vein endothelial cells (HUVECs) to evaluate the involvement of eNOS and related factors in peripheral vascular impairment with HA exposure. Treatment of HUVECs with HA induced upregulation of eNOS. This result coincides with those of previous studies. Furthermore this is the first study to report that HA induces upregulation of heat shock protein (Hsp)90α, Hsp90β, eNOS phosphorylation at Ser1177, and eNOS phosphorylation at Thr495, as compared to that in the control. In contrast, treatment with BAPTA, an intracellular Ca(2+) chelator, inhibited upregulation of these proteins induced by HA. This study demonstrates that HA treatment leads to increases in both Hsp90α and Hsp90β proteins and indicates that Hsp90α leads to eNOS phosphorylation at Ser1177 and that Hsp90β leads to eNOS phosphorylation at Thr495, respectively. Upregulation of eNOS, Hsp90α, and Hsp90β in HUVECs is regulated by intracellular Ca(2+) accumulation induced by HA. These results suggest that upregulation of eNOS phosphorylation at Ser1177 and eNOS phosphorylation at Thr495 produce NO and superoxide anions, respectively, resulting in generation of peroxynitrite, which causes impairment of vascular endothelial cells.

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(1)80 null	(15)5 as	(29)3 exposed	(43)2 expanded
(2)47 and	(16)5 expressed	(30)3 have	(44)2 expressing
(3)39 were	(17)5 of	(31)3 isolated	(45)2 had
(4)26 in	(18)5 which	(32)3 showed	(46)2 labeled
(5)12 (MSCs)	(19)4 (ASCs)	(33)3 we	(47)2 may
(6)11 was	(20)4 has	(34)2 (ASCs),	(48)2 play
(7)10 to	(21)4 is	(35)2 (BMSCs)	(49)2 present
(8)9 with	(22)4 on	(36)2 (ECFCs)	(50)2 remains
(9)7 are	(23)4 seeded	(37)2 (HSCs)	(51)2 such
(10)6 can	(24)4 within	(38)2 after	(52)2 the
(11)6 for	(25)3 (ASC)	(39)2 by	(53)2 via
(12)6 from	(26)3 (ECs)	(40)2 caused
(13)6 or	(27)3 (HUVECs)	(41)2 cultured
(14)6 that	(28)3 (hMSCs)	(42)2 derived

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--- WordNet output for cells --- Overview of noun cell The noun cell has 7 senses (first 3 from tagged texts) 1. (71) cell -- (any small compartment; "the cells of a honeycomb") 2. (44) cell -- ((biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals) 3. (1) cell, electric cell -- (a device that delivers an electric current as the result of a chemical reaction) 4. cell, cadre -- (a small unit serving as part of or as the nucleus of a larger political movement) 5. cellular telephone, cellular phone, cellphone, cell, mobile phone -- (a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver) 6. cell, cubicle -- (small room in which a monk or nun lives) 7. cell, jail cell, prison cell -- (a room where a prisoner is kept) --- WordNet end ---