ELIZA

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

420) However, only RAD51 showed a significant transcript increase between the immature oocytes collected from young or old individuals.

--- ABSTRACT ---

PMID:23673140 DOI:10.1017/S0967199413000154

2015 Zygote (Cambridge, England)

* Meiosis progression and donor age affect expression profile of DNA repair genes in bovine oocytes.

- Several genetic and physiological factors increase the risk of DNA damage in mammalian oocytes. Two critical events are: (i) meiosis progression, from maturation to fertilization, due to extensive chromatin remodelling during genome decondensation; and (ii) aging, which is associated with a progressive oxidative stress. In this work, we studied the transcriptional patterns of three genes, RAD51, APEX-1 and MLH1, involved in DNA repair mechanisms. The analyses were performed by real-time quantitative PCR (RT-qPCR) in immature and in vitro matured oocytes collected from 17 ± 3-month-old heifers and 94 ± 20-month-old cows. Batches of 30-50 oocytes for each group (three replicates) were collected from ovarian follicles of slaughtered animals. The oocytes were freed from cumulus cells at the time of follicle removal, or after in vitro maturation (IVM) carried out in M199 supplemented with 10% fetal calf serum, 10 IU luteinising hormone (LH)/ml, 0.1 IU follicle-stimulating hormone (FSH)/ml and 1 μg 17β-oestradiol/ml. Total RNA was extracted by Trizol method. The expression of bovine GAPDH gene was used as the internal standard, while primers for bovine RAD51, APEX-1 and MLH1 genes were designed from DNA sequences retrieved from GenBank. Results obtained indicate a clear up-regulation of RAD51, APEX-1 and MLH1 genes after IVM, ranging between two- and four-fold compared with germinal vesicle (GV) oocytes. However, only RAD51 showed a significant transcript increase between the immature oocytes collected from young or old individuals. This finding highlights RAD51 as a candidate gene marker for discriminating bovine immature oocytes in relation to the donor age.

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(1)259 in	(7)6 during	(13)3 drug	(19)2 ROM
(2)55 the	(8)5 was	(14)3 from	(20)2 between
(3)36 of	(9)5 with	(15)3 or	(21)2 chlamydia
(4)10 null	(10)4 life	(16)3 susceptibility	(22)2 could
(5)7 physical	(11)3 at	(17)3 their	(23)2 observed
(6)6 and	(12)3 awareness	(18)2 (P	(24)2 our

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--- WordNet output for increase --- =>大きくなる, を増す, 増大させる, 強まる, 増加, 増える, 増やす Overview of noun increase The noun increase has 5 senses (first 5 from tagged texts) 1. (49) addition, increase, gain -- (a quantity that is added; "there was an addition to property taxes this year"; "they recorded the cattle's gain in weight over a period of weeks") 2. (21) increase -- (a change resulting in an increase; "the increase is scheduled for next month") 3. (7) increase, increment, growth -- (a process of becoming larger or longer or more numerous or more important; "the increase in unemployment"; "the growth of population") 4. (3) increase, increment -- (the amount by which something increases; "they proposed an increase of 15 percent in the fare") 5. (3) increase, step-up -- (the act of increasing something; "he gave me an increase in salary") 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") --- WordNet end ---