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This study (FIS-PI21/01244 and PI21/01252) was supported by the Instituto de Salud Carlos III (grant no. Estatal de I + D + I 2020–2027) and co-financed by the European Development Regional Fund “A way to achieve Europe” and P2022/BMD-7321 (Comunidad de Madrid), and Halekulani S.L. and MJR., Psychosis is a complex clinical syndrome resulting in a loss of contact with reality and alterations in behavior and sensorial and motor functions. Although the onset of psychosis can be related to any medical condition, most cases of psychosis are not fully understood. Psychosis may manifest for the first time during pregnancy, which is detrimental to maternofetal well-being. The impact of having a first episode of psychosis during pregnancy on the placenta has not yet been explored. Oxidative stress is thought to take part in the etiopathogenesis of this complex disorder, and this condition can also affect the placenta as it is highly sensitive to changes in the maternal environment. In this sense, the aim of the present work was to study the gene and protein expression through RT–qPCR and immunohistochemistry, respectively, of oxidative stress markers (NOX-1, NOX-2, iNOS, eNOS and PARP) in the placental tissue of women who underwent a first episode of psychosis during pregnancy (FE-PW) in comparison to healthy pregnant women. Our results showed augmented gene and protein expression of NOX-1, NOX-2, iNOS and PARP in the placental tissue of FE-PW. For the first time, we demonstrated that oxidative stress may have an important pathophysiological role in this tissue, aiding in explaining the impact of psychosis on pregnancy and the need for future studies in this field to guide better clinical management of these patients., European Development Regional Fund “A way to achieve Europe”, Comunidad de Madrid, Instituto de Salud Carlos III, Halekulani S.L., MJR, Depto. de Medicina Legal, Psiquiatría y Patología, Depto. de Salud Pública y Materno - Infantil, Fac. de Medicina, TRUE, pub

This study (FIS-PI21/01244 and PI21/01252) was supported by the Instituto de Salud Carlos III (grant no. Estatal de I + D + I 2020–2027) and co-financed by the European Development Regional Fund “A way to achieve Europe” and P2022/BMD-7321 (Comunidad de Madrid), and Halekulani S.L. and M.J.R., Psychotic episodes represent one of the most complex manifestations of various mental illnesses, and these encompass a wide variety of clinical manifestations that together lead to high morbidity in the general population. Various mental illnesses are associated with psychotic episodes; in addition, although their incidence and prevalence rates have been widely described in the general population, their correct identification and treatment is a challenge for health professionals in relation to pregnancy. In pregnant women, psychotic episodes can be the consequence of the manifestation of a previous psychiatric illness or may begin during the pregnancy itself, placing not only the mother, but also the fetus at risk during the psychotic episode. In addition, we cannot forget that both pharmacological and nonpharmacological management are complex given the different teratogenic effects of various neuroleptic drugs or mood stabilizers; moreover, the recommendation is that patients should be followed together with different specialists to maintain close contact during puerperium given the high incidence of recurrence of psychotic episodes. In addition, we cannot forget that a large portion of these patients for whom the onset times of such episodes are during pregnancy have a greater probability of an unpredictable psychiatric illness that requires a postpartum follow up, in addition to the postpartum psychotic episodes, at some point in their lives. Therefore, the purpose of this review is to summarize the epidemiology of psychotic breaks during pregnancy related to the main mental illnesses that affect this population and to summarize the main pharmacological treatments available for their clinical management., European Development Regional Fund “A way to achieve Europe”, Comunidad de Madrid, Instituto de Salud Carlos III, Halekulani S.L., M.J.R., Depto. de Medicina Legal, Psiquiatría y Patología, Depto. de Salud Pública y Materno - Infantil, Fac. de Medicina, TRUE, pub