COVID-19: Is there a role for immunonutrition in obese patient?

On December 12, 2019 a new coronavirus (SARS-CoV-2) emerged in Wuhan, China, triggering a pandemic of severe acute respiratory syndrome in humans (COVID-19). Today, the scientific community is investing all the resources available to find any therapy and prevention strategies to defeat COVID-19. In this context, immunonutrition can play a pivotal role in improving immune responses against viral infections. Immunonutrition has been based on the concept that malnutrition impairs immune function. Therefore, immunonutrition involves feeding enriched with various pharmaconutrients (Omega 3 Fatty Acids, Vitamin C, Arginine, Glutamine, Selenium, Zinc, Vitamin, E and Vitamin D) to modulate inflammatory responses, acquired immune response and to improve patient outcomes. In literature, significant evidences indicate that obesity, a malnutrition state, negatively impacts on immune system functionality and on host defense, impairing protection from infections. Immunonutrients can promote patient recovery by inhibiting inflammatory responses and regulating immune function. Immune system dysfunction is considered to increase the risk of viral infections, such as SARS-CoV-2, and was observed in different pathological situations. Obese patients develop severe COVID-19 sequelae, due to the high concentrations of TNF-α, MCP-1 and IL-6 produced in the meantime by visceral and subcutaneous adipose tissue and by innate immunity. Moreover, leptin, released by adipose tissue, helps to increase inflammatory milieu with a dysregulation of the immune response. Additionally, gut microbiota plays a crucial role in the maturation, development and functions of both innate and adaptive immune system, as well as contributing to develop obese phenotype. The gut microbiota has been shown to affect lung health through a vital crosstalk between gut microbiota and lungs, called the "gut-lung axis". This axis communicates through a bi-directional pathway in which endotoxins, or microbial metabolites, may affect the lung through the blood and when inflammation occurs in the lung, this in turn can affect the gut microbiota. Therefore, the modulation of gut microbiota in obese COVID-19 patients can play a key role in immunonutrition therapeutic strategy. This umbrella review seeks to answer the question of whether a nutritional approach can be used to enhance the immune system's response to obesity in obese patients affected by COVID-19.

Maternal mental health and reproductive outcomes: a scoping review of the current literature.

PURPOSE: Current data show that maternal mental conditions affect about 10% of pregnant women worldwide. Assessing timing and patterns of mental health illness, therefore, is critical to ensure the wellbeing of the mother, the new-born and the whole family. The aim of this review is to summarize the latest evidence linking maternal mental disorders and adverse reproductive outcomes. METHODS: Following the PRISMA guidelines for systematic reviews, a literature search was conducted to ascertain the possible impact of mental health conditions on reproductive outcomes before and during pregnancy. The comprehensive strategy included cohort studies, randomised controlled trials and literature reviews on women with Primary Maternal Mental Illness (PMMI) and Secondary Maternal Mental Illness (SMMI) considering periconceptional, obstetric and foetal-neonatal outcomes. PubMed, WoS, CINAHL and Google scholar were used for the search. Cross-referencing in bibliographies of the selected papers ensured wider study capture. RESULTS: Evidence linking depressive disorders and infertility among PMMI is weak. Given this, women with prior mental conditions experience additional distress when undergoing fertility treatments. Primary mental disorders may also increase the risk of miscarriage and other pregnancy complications (e.g., gestational diabetes). For SMMI, there is more robust evidence correlating Preterm Birth (PTB) and Low Birth Weight (LBW) with common mental disorders which develop during pregnancy. CONCLUSION: Prevention and management of maternal mental health diseases and minor mental conditions within the first 1000 days' timeframe, should have a place in the holistic approach to women going through reproductive decisions, infertility treatment and pregnancy.