Mitochondria are active independent organelles that not only meet the cellular energy requirement but also regulate central cellular activities. Mitochondria can play a critical role in physiological adaptations during pregnancy. Differences in mitochondrial function have been found between healthy and complicated pregnancies. Pregnancy signifies increased nutritional requirements to support fetal growth and the metabolism of maternal and fetal tissues. Nutrient availability regulates mitochondrial metabolism, where excessive macronutrient supply could lead to oxidative stress and contribute to mitochondrial dysfunction, while micronutrients are essential elements for optimal mitochondrial processes, as cofactors in energy metabolism and/or as antioxidants. Inadequate macronutrient and micronutrient consumption can result in adverse pregnancy outcomes, possibly through mitochondrial dysfunction, by impairing energy supply, one-carbon metabolism, biosynthetic pathways, and the availability of metabolic co-factors which modulate the epigenetic processes capable of establishing significant short- and long-term effects on infant health. Here, we review the importance of macronutrients and micronutrients on mitochondrial function and its influence on maternal and infant health.

Ultra-processed food (UPF) consumption during gestation may lead to increased oxidative stress (OS) and could affect pregnancy outcomes. This study aims to evaluate the association of UPF consumption during pregnancy with circulating levels of OS markers. Diet was assessed (average of three assessments) in 119 pregnant women enrolled in the OBESO perinatal cohort (Mexico), obtaining quantitative data and the percentage of energy that UPFs (NOVA) contributed to the total diet. Sociodemographic, clinical (pregestational body-mass index and gestational weight gain) and lifestyle data were collected. Maternal circulating levels of OS markers (malondialdehyde (MDA), protein carbonylation (PC), and total antioxidant capacity (TAC)) were determined at the third trimester of pregnancy. Adjusted linear regression models were performed to analyze the association between UPFs and OS markers. UPFs represented 27.99% of the total energy intake. Women with a lower UPF consumption (<75 percentile°) presented a higher intake of fiber, ω-3, ω-6, and a lower ω-6/3 ratio. Linear regression models showed that UPFs were inversely associated with TAC and MDA. Fiber intake was associated with PC. UPF intake during pregnancy may result in an increase in oxidative stress. When providing nutrition care, limiting or avoiding UPFs may be an intervention strategy that could promote a better antioxidant capacity in the body.

Evidence has implicated oxidative stress (OS) and inflammation as drivers of neurodegenerative pathologies. We previously reported on the beneficial effects of (-)-epicatechin (Epi) treatment, on aging-induced OS and its capacity...

Gonadal hormones regulate expression and activation of protein tau. Tibolone is a drug used as first- choice comprehensive treatment for the relief of menopausal symptoms, because it and its various metabolites have estrogenic properties and progestogenic/androgenic effects; however, the effect on the activation of tau protein and its signaling cascade in the brain is unknown. We studied the effect of chronic administration of estradiol (E2), progesterone (P4), and tibolone (TIB) on the expression and phosphorylation of microtubule-associated protein tau and glycogen synthase kinase-3β (GSK3β) in the hippocampus and cerebellum of ovariectomized rats. Ovariectomized adult female rats were implanted with pellets of vehicle, E2, or P4 or were treated with TIB by oral administration for 60 days. The animals were sacrificed, and tissue proteins were analyzed by Western blot. We observed that, in the hippocampus, administration of E2, P4, or TIB significantly decreased the protein content of hyperphosphorylated tau and increased the tau dephosphorylated form, whereas only treatment with TIB increased the content of the phosphorylated form of GSK3β. In the cerebellum, E2 and TIB treatments resulted in a significant decrease in the expression of hyperphosphorylated tau, whereas E2 and TIB increased phosphorylated GSK3β; P4 had no effect. These results indicate that chronic administration of gonadal hormones and tibolone modulates tau and GSK3β phosphorylation in hippocampus and cerebellum of the rat and may exert a neuroprotective effect in these tissues.

Introduction: Postpartum haemorrhage (PPH) is the main cause of maternal morbidity and mortality globally, but it is far more important in non-developed countries.PPH represents 25% of all maternal deaths worldwide. Women with von Willebrand disease (VWD) and other inherited haemorrhagic disorders are at increased risk of PPH. Our aim was to establish a probable association of severe PPH in women with a history of haemostatic abnormalities.Methods: An observational, controlled study of adult women with a one or more episodes of severe PPH requiring treatment in an intensive care unit or >10 units of blood products during the 24-hour period after diagnosis and their controls. The tests performed were blood cell count, blood group, renal, viral, liver function and haemostatic tests, fibrinogen, activity of the plasma factors and specific test to diagnose and classify VWD. Results:We included 124 women with 133 PPH events and their controls. The median age at the first event was 25.5 years old. Results were significantly different between the groups in terms of fibrinogen concentration, VWF:Ag, VWF:RCo and FVIII. A specific diagnosis was established in 69 (55.6) and 4 (3.2%) patients in the

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