Doğum Eylemi ve Doğumla İlgili Mikrobiyom
Özet
Bu çalışma, yaşamın erken dönemlerinde bebek bağırsak mikrobiyotasının gelişimini ve buna etki eden perinatal faktörleri incelemektedir. Bağırsak mikrobiyotasının temellerinin doğum öncesinde atılıp atılmadığı tartışmalı olmakla birlikte, doğum şekli kolonizasyon üzerinde belirleyici bir rol oynar. Vajinal doğumla doğan bebekler annenin vajinal ve fekal bakterileriyle aşılanırken, sezaryen ile doğan bebeklerde bu geçiş bozulur; bu durum bakteri çeşitliliğinin azalmasına ve potansiyel olarak uzun vadede obezite, alerji ile bağışıklık yetersizliği riskinin artmasına yol açar. İnfant beslenmesinde anne sütü, içerdiği biyoaktif moleküller ve prebiyotik oligosakkaritler sayesinde yararlı bakterilerin çoğalmasını destekleyerek stabil bir mikrobiyota sağlarken, formül mamalar patojenik eğilimli farklı bir bakteriyel patern oluşturur. Doğum sırasında veya yenidoğan döneminde kullanılan antibiyotikler ise tür zenginliğini önemli ölçüde azaltarak mikrobiyal dengesizliğe (disbiyoz) neden olur. Erken doğum da YYBÜ ortamı ve tıbbi müdahaleler nedeniyle mikrobiyota gelişimini olumsuz etkiler. Son yıllarda sezaryen bebeklerinin mikrobiyotasını onarmak amacıyla vajinal tohumlama gibi yöntemler geliştirilse de güvenlik ve etkinlik açısından daha fazla klinik veriye ihtiyaç duyulmaktadır. Sonuç olarak, peripartum dönemdeki klinik uygulamaların mikrobiyomu koruyacak şekilde optimize edilmesi, bebek sağlığı açısından kritik öneme sahiptir.
This study examines the development of the infant gut microbiota during early life and the perinatal factors influencing it. Although whether the foundations of the gut microbiota are established prenatally remains controversial, the mode of delivery plays a decisive role in colonization. Infants born via vaginal delivery are inoculated with maternal vaginal and fecal bacteria, whereas this transfer is disrupted in infants born by cesarean section, leading to reduced bacterial diversity and potentially increasing the long-term risk of obesity, allergies, and immune deficiencies. In infant nutrition, breast milk supports the proliferation of beneficial bacteria and ensures a stable microbiota thanks to its bioactive molecules and prebiotic oligosaccharides, whereas formula milk creates a different bacterial pattern with pathogenic tendencies. Antibiotics used during delivery or the neonatal period significantly reduce species richness, causing microbial imbalance (dysbiosis). Preterm birth also adversely affects microbiota development due to the NICU environment and medical interventions. Although methods such as vaginal seeding have been developed in recent years to restore the microbiota of cesarean infants, more clinical data are required regarding safety and efficacy. In conclusion, optimizing clinical practices during the peripartum period to protect the microbiome is of critical importance for infant health.
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