ELIZA

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611425 occurrences (No.13 in the rank) during 5 years in the PubMed. [no cache] 500 found

254) These oxysterols are atypical precursors of cholesterol found to be present in increased concentrations in brain, liver, and serum of animals treated with AY9944, an inhibitor of 3β-hydroxysterol-Δ(7)-reductase (Dhcr7).

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PMID:23920082 DOI:10.1016/j.chemphyslip.2013.07.004

2015 Chemistry and physics of lipids

* An efficient synthesis of 4α- and 4β-hydroxy- 7-dehydrocholesterol, biomarkers for patients with and animal models of the Smith-Lemli-Opitz syndrome.

- A highly efficient and improved method for the preparation of stereoisomeric 4α- and 4β-hydroxy-7-dehydrocholesterol has been developed. These oxysterols are atypical precursors of cholesterol found to be present in increased concentrations in brain, liver, and serum of animals treated with AY9944, an inhibitor of 3β-hydroxysterol-Δ(7)-reductase (Dhcr7). AY9944 -treated rats are considered a model for Smith-Lemli-Opitz syndrome (SLOS). The principal reactions involved were (1) cis-4α,5α-dihydroxylation of the allylic 3β-acetoxy-Δ(4) intermediate with in situ generated RuO4 and subsequent dehydration with SOCl2, (2) direct 4β-hydroxylation of cholesterol with selenium dioxide, and (3) regioselective dehydrogenation at C-7/-8 of the resulting 4α- and 4β-hydroxylated derivatives with 1,3-dibromo-5,5-dimethylhydantoin/azobisisobutyronitrile, followed by tetrabutyl ammonium bromide/tetrabutyl ammonium fluoride. Chemical instability of these 4-hydroxylated 7-dehydrocholesterols when exposed to UV light, heat or in an acidic medium is briefly discussed.

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(1)36 the	(14)5 to	(27)2 RDW	(40)2 likelihood
(2)34 in	(15)4 after	(28)2 awareness	(41)2 maternal
(3)27 risk	(16)4 as	(29)2 bone	(42)2 morbidity
(4)21 null	(17)3 activity	(30)2 but	(43)2 number
(5)20 with	(18)3 among	(31)2 compared	(44)2 over
(6)16 by	(19)3 at	(32)2 concentrations	(45)2 pre-stimulus
(7)15 significantly	(20)3 cell	(33)2 drug	(46)2 production
(8)6 and	(21)3 level	(34)2 during	(47)2 rapidly
(9)6 expression	(22)3 levels	(35)2 fax	(48)2 use
(10)6 from	(23)3 physical	(36)2 functional	(49)2 vascular
(11)5 activation	(24)3 sensitivity	(37)2 hepatic
(12)5 odds	(25)2 MI	(38)2 if
(13)5 serum	(26)2 Math1	(39)2 interest

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--- WordNet output for increased --- =>力の増加 Overview of verb increase The verb increase has 2 senses (first 2 from tagged texts) 1. (86) increase -- (become bigger or greater in amount; "The amount of work increased") 2. (61) increase -- (make bigger or more; "The boss finally increased her salary"; "The university increased the number of students it admitted") Overview of adj increased The adj increased has 1 sense (first 1 from tagged texts) 1. (30) increased -- (made greater in size or amount or degree) --- WordNet end ---