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378430 occurrences (No.48 in the rank) during 5 years in the PubMed. [no cache] 500 found

298) To our knowledge this report is the first using these antioxidants to supplement rabbit freezing extender.

--- ABSTRACT ---

PMID:23965603 DOI:10.1017/S0967199413000270

2015 Zygote (Cambridge, England)

* Absence of beneficial effects on rabbit sperm cell cryopreservation by several antioxidant agents.

- The generation of reactive oxygen species associated with cryopreservation could be responsible for mammalian sperm damage and the limitable value of stored semen in artificial insemination. The aim of this study was to assess several antioxidant agents supplemented in a commercial freezing extender (Gent B®) in order to improve post-thaw rabbit sperm quality. Ejaculates of 26 New Zealand White rabbit bucks were collected, evaluated and frozen using a conventional protocol. Antioxidant agents were tested at different concentrations: bovine serum albumin (BSA; 5, 30 or 60 mg/ml), retinol (RO; 50, 100 or 200 μM) and retinyl (RI; 0.282 or 2.82 μg/ml). Per cent viability, morphological abnormalities and intact acrosomes were determined using eosin-nigrosin staining. Motility and progressivity were analyzed by computer-assisted sperm analysis (CASA). In general, all sperm quality parameters were negatively affected by the cryopreservation process, the largest effect seen was for total motility. The addition of antioxidant agents did not improve thaw sperm quality. Furthermore, for RI groups a significant decrease in sperm quality parameters was recorded. In conclusion, rabbit sperm quality is negatively affected by the cryopreservation process. To our knowledge this report is the first using these antioxidants to supplement rabbit freezing extender. BSA and RO at concentrations used in the study did not improve sperm quality parameters after thawing, whereas RI supplementation appeared to be toxic. More studies are required to find the appropriate antioxidants necessary and their most effective concentrations to improve rabbit post-thaw sperm quality.

--- ABSTRACT END ---

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(1)32 time	(19)5 meaningful	(37)2 5	(55)2 marriage
(2)21 report	(20)4 line	(38)2 6	(56)2 meta-analysis
(3)11 and	(21)3 14	(39)2 72	(57)2 mitochondrial
(4)11 to	(22)3 3	(40)2 application	(58)2 months
(5)10 time,	(23)3 complete	(41)2 approach	(59)2 myocardial
(6)9 year	(24)3 described	(42)2 article	(60)2 postnatal
(7)8 2	(25)3 in	(43)2 attempt	(61)2 presented
(8)8 molar	(26)3 it	(44)2 choice	(62)2 relapse
(9)8 reported	(27)3 order	(45)2 clinical	(63)2 smear
(10)8 step	(28)3 postoperative	(46)2 component	(64)2 stage
(11)8 we	(29)3 record	(47)2 comprehensive	(65)2 step,
(12)7 case	(30)3 sequenced	(48)2 concern	(66)2 test
(13)6 determined	(31)3 the	(49)2 course	(67)2 that
(14)6 group	(32)3 treatment	(50)2 demonstration	(68)2 therapy
(15)6 study	(33)3 two	(51)2 few	(69)2 trimester
(16)5 dose	(34)3 was	(52)2 intentions	(70)2 trimester,
(17)5 evidence	(35)2 null	(53)2 introduction	(71)2 using
(18)5 generation	(36)2 30	(54)2 left

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--- WordNet output for first --- =>初めて, 最初の, 第一の, はじめに, 最初, 第1 Overview of noun first The noun first has 6 senses (first 4 from tagged texts) 1. (9) first, number one -- (the first or highest in an ordering or series; "He wanted to be the first") 2. (5) first, number one, number 1 -- (the first element in a countable series; "the first of the month") 3. (1) beginning, commencement, first, outset, get-go, start, kickoff, starting time, showtime, offset -- (the time at which something is supposed to begin; "they got an early start"; "she knew from the get-go that he was the man for her") 4. (1) first base, first -- (the fielding position of the player on a baseball team who is stationed at first of the bases in the infield (counting counterclockwise from home plate)) 5. first, first-class honours degree -- (an honours degree of the highest class) 6. first gear, first, low gear, low -- (the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving) Overview of adj first The adj first has 6 senses (first 5 from tagged texts) 1. (232) first -- (preceding all others in time or space or degree; "the first house on the right"; "the first day of spring"; "his first political race"; "her first baby"; "the first time"; "the first meetings of the new party"; "the first phase of his training") 2. (61) first, 1st -- (indicating the beginning unit in a series) 3. (4) inaugural, initiative, initiatory, first, maiden -- (serving to set in motion; "the magazine's inaugural issue"; "the initiative phase in the negotiations"; "an initiatory step toward a treaty"; "his first (or maiden) speech in Congress"; "the liner's maiden voyage") 4. (4) beginning, first -- (serving to begin; "the beginning canto of the poem"; "the first verse") 5. (3) first, foremost, world-class -- (ranking above all others; "was first in her class"; "the foremost figure among marine artists"; "the top graduate") 6. first -- (highest in pitch or chief among parts or voices or instruments or orchestra sections; "first soprano"; "the first violin section"; "played first horn") Overview of adv first The adv first has 4 senses (first 4 from tagged texts) 1. (58) first, firstly, foremost, first of all, first off -- (before anything else; "first we must consider the garter snake") 2. (40) first, for the first time -- (the initial time; "when Felix first saw a garter snake") 3. (9) first -- (before another in time, space, or importance; "I was here first"; "let's do this job first") 4. (4) foremost, first -- (prominently forward; "he put his best foot foremost") --- WordNet end ---