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325270 occurrences (No.61 in the rank) during 5 years in the PubMed. [no cache] 500 found

225) These findings provide new information into the possible correlation between Ago2/miRs complex regulation and DA neurons plasticity during opiate addiction.

--- ABSTRACT ---

PMID:23927484 DOI:10.1111/adb.12083

2015 Addiction biology

* Morphine regulates Argonaute 2 and TH expression and activity but not miR-133b in midbrain dopaminergic neurons.

- Epigenetic changes such as microRNAs (miRs)/Ago2-induced gene silencing represent complex molecular signature that regulate cellular plasticity. Recent studies showed involvement of miRs and Ago2 in drug addiction. In this study, we show that changes in gene expression induced by morphine and morphine withdrawal occur with concomitant epigenetic modifications in the mesolimbic dopaminergic (DA) pathway [ventral tegmental area (VTA)/nucleus accumbens (NAc) shell], which is critically involved in drug-induced dependence. We found that acute or chronic morphine administration as well as morphine withdrawal did not modify miR-133b messenger RNA (mRNA) expression in the VTA, whereas Ago2 protein levels were decreased and increased in morphine-dependent rats and after morphine withdrawal, respectively. These changes were paralleled with enhanced and decreased NAc tyrosine hydroxylase (TH) protein (an early DA marker) in morphine-dependent rats and after withdrawal, respectively. We also observed changes in TH mRNA expression in the VTA that could be related to Ago2-induced translational repression of TH mRNA during morphine withdrawal. However, the VTA number of TH-positive neurons suffered no alterations after the different treatment. Acute morphine administration produced a marked increase in TH activity and DA turnover in the NAc (shell). In contrast, precipitated morphine withdrawal decreased TH activation and did not change DA turnover. These findings provide new information into the possible correlation between Ago2/miRs complex regulation and DA neurons plasticity during opiate addiction.

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(1)109 a	(12)6 insight	(23)3 care	(34)2 effective
(2)39 an	(13)6 recommendations	(24)3 direct	(35)2 first
(3)32 the	(14)5 reliable	(25)3 guidance	(36)2 for
(4)25 evidence	(15)5 them	(26)3 novel	(37)2 good
(5)14 useful	(16)4 information	(27)3 preliminary	(38)2 greater
(6)13 new	(17)4 insights	(28)2 accurate	(39)2 methodological
(7)8 more	(18)4 such	(29)2 additional	(40)2 one
(8)7 rather	(19)4 us	(30)2 analytical	(41)2 some
(9)7 support	(20)4 valuable	(31)2 answers	(42)2 sufficient
(10)6 further	(21)3 adequate	(32)2 basic	(43)2 to
(11)6 important	(22)3 better	(33)2 clinically

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--- WordNet output for provide --- =>供給する, 与える, 規定する, 条件とする, 準備する, 用意する, 扶養する, 援助する Overview of verb provide The verb provide has 7 senses (first 4 from tagged texts) 1. (270) supply, provide, render, furnish -- (give something useful or necessary to; "We provided the room with an electrical heater") 2. (25) provide, supply, ply, cater -- (give what is desired or needed, especially support, food or sustenance; "The hostess provided lunch for all the guests") 3. (14) provide -- (determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation; "The will provides that each child should receive half of the money"; "The Constitution provides for the right to free speech") 4. (2) put up, provide, offer -- (mount or put up; "put up a good fight"; "offer resistance") 5. leave, allow for, allow, provide -- (make a possibility or provide opportunity for; permit to be attainable or cause to remain; "This leaves no room for improvement"; "The evidence allows only one conclusion"; "allow for mistakes"; "leave lots of time for the trip"; "This procedure provides for lots of leeway") 6. provide, bring home the bacon -- (supply means of subsistence; earn a living; "He provides for his large family by working three jobs"; "Women nowadays not only take care of the household but also bring home the bacon") 7. provide -- (take measures in preparation for; "provide for the proper care of the passengers on the cruise ship") --- WordNet end ---