Značaj direktnog genetičkog testiranja za otkrivanje žena prenosioca mutacije kod distrofinopatija

  • Jasmina Maksić University of Belgrade, Faculty for Special Education and Rehabilitation, Belgrade, Serbia
  • Nela Maksimović University of Belgrade, Faculty of Medicine, Belgrade, Serbia
  • Lukas Rasulić University of Belgrade, Faculty of Medicine, Belgrade, Serbia
  • Olgica Milankov Institute for Health Care of Children and Youth of Vojvodina, Novi Sad, Serbia
  • Ana Marjanović University Clinical Center of Serbia, Clinic for Neurology, Belgrade, Serbia
  • Dragana Cvetković University of Belgrade, Faculty of Biology, Belgrade, Serbia
  • Vidosava Rakočević Stojanović University of Belgrade, Faculty of Medicine, Belgrade, Serbia
  • Ivana Novaković University of Belgrade, Faculty of Medicine, Belgrade, Serbia
DOI: https://doi.org/10.2298/VSP190208030M
Ključne reči: geni, genetičko testiranje, mišići, distrofija, mutacija, prenatalna dijagnoza, žene

Sažetak


Uvod/Cilj. Dišenova mišićna distrofija (MD) i Bekerova MD su uzrokovane mutacijama u genu za distrofin (DMD). To su recesivne bolesti vezane za X hromozom, od kojih obolevaju muškarci, a žene su uglavnom zdravi nosioci mu-tacije. Procenjeno je da su kod probanada obolelih od Dišenove MD 2/3 majki nosioci mutacije, dok 1/3 pro-banada ima de novo mutaciju. Cilj rada bio je da se potvrdi status nosioca mutacije kod ženskih članova porodica pro-banada obolelih od Dišenove MD/Bekerove MD prime-nom metoda direktnog genetičkog testiranja. Metode. Studija je obuhvatila ukupno 38 žena iz 31 porodice pro-banada obolelih od Dišenove MD/Bekerove MD sa deleci-jom/duplikacijom u DMD genu. Takođe, u studiju su bila uključena i 4 slučaja Dišenove MD/Bekerove MD otkrivena prenatalnom dijagnostikom. Metoda lančane reakcije poli-meraze (polymerase chain reaction – PCR) i metoda višestrukog umnožavanja vezanih proba (multiplex ligation-dependent probe amplification -MLPA) su korišćene za detekciju delecija, od-nosno delecija/duplikacija mutacija u DMD genu. Rezulta-ti. Kod ukupno 31 probanada obolelih od Dišenove MD/Bekerove MD, utvrđeno je 87,1% mutacija tipa deleci-je i 12,9% mutacija tipa duplikacija jednog ili više egzona u DMD genu. Od 29 testiranih majki probanada, mutacije su nađene kod njih 17 (14 delecija i 3 duplikacije). Mutacije su detektovane kod 11 (57,9%) od 19 majki probanada sa feno-tipom Dišenove MD i kod 6 (60%) od 10 majki probanada obolelih od Bekerove MD. Takođe, kod probanada sa de-lecijom, kod 14 (56%) od 25 majki je potvrđeno da su nosioci mutacije, a kod probanada sa duplikacijom, 3 (75%) od 4 majke su bile nosioci mutacije. Od ostalih 9 ženskih srodnika probanada obolelih od Dišenove MD/Bekerove MD, mutacije su nađene kod nijh 4. Prenatalnom dijagnos-tikom utvrđene su delecije kod jednog muškog i jednog ženskog fetusa iste majke koja je bila potvrđena kao nosilac mutacije. Zaključak. Istraživanje je pokazalo da su majke bile nosioci mutacija u skoro 60% izolovanih slučajeva ob-olelih od Dišenove MD/Bekerove MD sa delecijama i duplikacijama. Takođe, učestalost majki nosioca mutacije kod probanada sa duplikaciom (75%) se pokazala višom ne-go kod majki probanada sa delecijom (56%).

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2023/04/30
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Vol. 80 Br. 03 (2023): Vojnosanitetski pregled
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Originalni članak