ReviewPublished 29 September 2026Neurobiological mechanisms and brain network dysfunction in major depressive disorder: an integrative reviewDina Iskakova · Burcu Yener · Altyngul Kamzanova · Aygul Sitakanova · Rifat Hamoudi · Almira KustubayevaFrontiers in Integrative Neurosciencedoi 10.3389/fnint.2026.1904444