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2021, vol. 72, br. 1, str. 6-11
Uticaj hroničnog imobilizacionog stresa na estrusni ciklus kod ženki miševa soja NMRI
aUniverzitet u Novom Sadu, Medicinski fakultet
bUniverzitet u Novom Sadu, Filozofski fakultet, Odsek za psihologiju
cPasterov zavod, Novi Sad + Univerzitet u Novom Sadu, Medicinski fakultet, Katedra za mikrobiologiju sa parazitologijom i imunologijom

e-adresapavle.banovic@mf.uns.ac.rs
Ključne reči: imobilizacijski stres; estrusni ciklus; ženke miševa; soj NMRI
Sažetak
Uvod: Stres je skup reakcija organizma koje nastaju usled dejstva faktora spoljašnje sredine. Da bi se održala homeostaza i zaštitio organizam, uključuju se brojni adaptacioni mehanizmi. Stresori koji deluju trenutno ili kratkoročno izazivaju akutni stres koji ima protektivni efekat. Kada stresor deluje duže, a organizam ne uspeva da odgovori na izazov, javlja se hronični stres koji vodi u patološko stanje. Hronični stres je, kao etiološki faktor, doveden u vezu sa poremećajima menstrualnog ciklusa žena. Cilj: Cilj je ispitati dejstvo hroničnog imobilizacionog stresa na estrusni ciklus kod ženki miševa NMRI soja. Materijal i metode: Dvanaest polno zrelih ženki miševa NMRI soja nasumično je podeljeno u kontrolnu (n = 6) i eksperimentalnu grupu (n = 6). Eksperimentalnoj grupi je indukovan hronični stres ubacivanjem u imobilizacione komore 2 sata dnevno u periodu od 14 dana. Svakodnevno je svim životinjama uziman vaginalni ispirak od koga je pravljen razmaz radi ispitivanja pod svetlosnim mikroskopom. Analiza preparata je obuhvatala određivanje faza estrusnog ciklusa. Za analizu efekta stresa statistički je ispitana učestalost smenjivanja estrusnih faza u eksperimentalnoj grupi naspram kontrolne. Rezultati: Kod ženki miševa je uočen estrusni ciklus koji se sastoji iz četiri faze: proestrusa, estrusa, metestrusa i diestrusa. U adaptacionom periodu je zapažen prolongirani diestrus, dominantno prisutan u obe grupe. Kod stresiranih jedinki je uočen izlazak iz diestrusa i pojava drugih estrusnih faza, za razliku od kontrolnih kod kojih je diesterus bio znatno učestaliji. Zapažene su neregularnosti u trajanju i smenjivanju faza kod jedinki eksperimentalne grupe, gde se učestalost odstupanja od diestrusa pokazala kao statistički značajna (p < 0,01). Zaključak: Indukovanje imobilizacionog stresa dovodi do izlaska životinja iz diestrusa i velikih varijacija u trajanju i smenjivanju faza estrusnog ciklusa ženki miševa soja NMRI. S obzirom na to da je hormonski mehanizam regulacije estrusnog ciklusa kod ženki miševa soja NMRI sličan mehanizmu regulacije menstrualnog ciklusa kod žena, mogu poslužiti kao dobar model za proučavanje reproduktivnih poremećaja kod žena.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/mp72-28778
objavljen u SCIndeksu: 20.05.2021.
metod recenzije: dvostruko anoniman
Creative Commons License 4.0

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