ELIZA

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290904 occurrences (No.84 in the rank) during 5 years in the PubMed. [no cache] 500 found

116) The anti-osteoclastic effect of nitensidine A was greatly reduced by substituting the imino nitrogen atom in nitensidine A with sulfur or oxygen.

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PMID:23892478 DOI:10.1007/s10616-013-9590-2

2015 Cytotechnology

* Nitensidine A, a guanidine alkaloid from Pterogyne nitens, induces osteoclastic cell death.

- Nitensidine A is a guanidine alkaloid isolated from Pterogyne nitens, a common plant in South America. To gain insight into the biological activity of P. nitens-produced compounds, we examined herein their biological effects on osteoclasts, multinucleated giant cells that regulate bone metabolism by resorbing bone. Among four guanidine alkaloids (i.e., galegine, nitensidine A, pterogynidine, and pterogynine), nitensidine A and pterogynine exhibited anti-osteoclastic effects at 10 μM by reducing the number of osteoclasts on the culture plate whereas galegine and pterogynidine did not. The anti-osteoclastic activities of nitensidine A and pterogynine were exerted in a concentration-dependent manner, whereas nitensidine A exhibited an approximate threefold stronger effect than pterogynine (IC50 values: nitensidine A, 0.93 ± 0.024 μM; pterogynine, 2.7 ± 0.40 μM). In the present study, the anti-osteoclastic effects of two synthetic nitensidine A derivatives (nitensidine AT and AU) were also examined to gain insight into the structural features of nitensidine A that exert an anti-osteoclastic effect. The anti-osteoclastic effect of nitensidine A was greatly reduced by substituting the imino nitrogen atom in nitensidine A with sulfur or oxygen. According to the differences in chemical structures and anti-osteoclastic effects of the four guanidine alkaloids and the two synthetic nitensidine A derivatives, it is suggested that the number, binding site, and polymerization degree of isoprenyl moiety in the guanidine alkaloids and the imino nitrogen atom cooperatively contribute to their anti-osteoclastic effects.

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(1)66 the	(12)4 activity	(24)2 among	(35)2 interhemispheric
(2)30 in	(13)4 both	(25)2 availability	(36)2 it
(3)23 by	(14)4 cell	(26)2 blood	(37)2 likelihood
(4)13 null	(16)3 ability	(27)2 but	(38)2 number
(5)13 to	(17)3 after	(28)2 compared	(39)2 rates
(6)10 glutathione	(18)3 binding	(29)2 effortful	(40)2 stem
(7)8 and	(19)3 or	(30)2 ejection	(41)2 total
(8)8 expression	(20)3 risk	(31)2 following	(42)2 tumor
(9)5 levels	(21)3 sensitivity	(32)2 from	(43)2 which
(10)5 significantly	(22)2 (P	(33)2 glutathione,
(11)4 PGE2	(23)2 BRCA-1	(34)2 hippocampal

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--- WordNet output for reduced --- =>貧しい暮らし, 落ちぶれた生活 Overview of verb reduce The verb reduce has 20 senses (first 11 from tagged texts) 1. (102) reduce, cut down, cut back, trim, trim down, trim back, cut, bring down -- (cut down on; make a reduction in; "reduce your daily fat intake"; "The employer wants to cut back health benefits") 2. (9) reduce -- (make less complex; "reduce a problem to a single question") 3. (5) reduce -- (bring to humbler or weaker state or condition; "He reduced the population to slavery") 4. (3) reduce -- (simplify the form of a mathematical equation of expression by substituting one term for another) 5. (3) reduce -- (lower in grade or rank or force somebody into an undignified situation; "She reduced her niece to a servant") 6. (3) reduce, come down, boil down -- (be the essential element; "The proposal boils down to a compromise") 7. (2) shrink, reduce -- (reduce in size; reduce physically; "Hot water will shrink the sweater"; "Can you shrink this image?") 8. (1) reduce -- (lessen and make more modest; "reduce one's standard of living") 9. (1) reduce, scale down -- (make smaller; "reduce an image") 10. (1) deoxidize, deoxidise, reduce -- (to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons) 11. (1) reduce, tighten -- (narrow or limit; "reduce the influx of foreigners") 12. repress, quash, keep down, subdue, subjugate, reduce -- (put down by force or intimidation; "The government quashes any attempt of an uprising"; "China keeps down her dissidents very efficiently"; "The rich landowners subjugated the peasants working the land") 13. reduce -- (undergo meiosis; "The cells reduce") 14. reduce -- (reposition (a broken bone after surgery) back to its normal site) 15. reduce -- (destress and thus weaken a sound when pronouncing it) 16. abridge, foreshorten, abbreviate, shorten, cut, contract, reduce -- (reduce in scope while retaining essential elements; "The manuscript must be shortened") 17. boil down, reduce, decoct, concentrate -- (be cooked until very little liquid is left; "The sauce should reduce to one cup") 18. reduce, boil down, concentrate -- (cook until very little liquid is left; "The cook reduced the sauce by boiling it for a long time") 19. dilute, thin, thin out, reduce, cut -- (lessen the strength or flavor of a solution or mixture; "cut bourbon") 20. reduce, melt off, lose weight, slim, slenderize, thin, slim down -- (take off weight) Overview of adj reduced The adj reduced has 2 senses (first 2 from tagged texts) 1. (6) decreased, reduced -- (made less in size or amount or degree) 2. (1) reduced, rock-bottom -- (well below normal (especially in price)) --- WordNet end ---