Patients with long-term effects of coronavirus disease, the so-called “long-term COVID-19 syndrome” (long-COVID-19) after SARS-CoV-2 infection, have a postponed recovery lasting from 4 weeks and up to six months, spread worldwide. Physiological predictors based on human blood biomarkers and host-virus responses to SARS-CoV-2 are still unknown. There is growing evidence about the impact of micronutrients on improving lymphocyte proliferation and their essential roles for a functioning human immune system and regulating metabolic health. This paper aims to review information about micronutrients in patients with SARS-CoV-2 infection that determines long-COVID-19 outcomes and highlight the importance of diagnostics in predictors of long-COVID-19. We reviewed articles returned from searches on PubMed/SCOPUS/Web of Science/ EMBASE databases using a combination of terms “long COVID-19”, “long-term effects of COVID-19”, “post-COVID-19 symptoms”, “COVID-19 associated stress”, “micronutrients”. Evidence indicates the relationship between lymphocyte proliferation improving micronutrient level and long-COVID-19 induction. Zinc, selenium, iron, manganese have an immunomodulatory function in innate and adaptive immune responses to viral infection. Anti-inflammatory functions of Vits A and B groups include the regulation of lymphocyte proliferation and metabolic health. Further research using sampling and artificial intelligence-assisted algorithms could assist in the recognition of the correlation of micronutrients and long-COVID-19 clinical outcomes
A high fructose diet (HFD) and advanced age are key factors for the gradual loss of physiological integrity of adipose tissue. Endogenous hydrogen sulfide (H2S) has beneficial effects on cytoprotection and redox balance. But its interactive effects on age-related damage of mesenteric vessels and connective and adipose tissues (MA) during HFD which could be the base of the development of effective physiological-based therapeutic strategy are unknown. The aim of study was to investigate age- and HFD-induced mesenteric cellular changes and activities of enzymes in H2S synthesis and to test the effects of sodium hydrosulfide (NaHS) which is considered an H2S donor on them. Adult and aged male rats on a standard diet (SD) or 4-week HFD were exposed to acute water-immersion restraint stress (WIRS) for evaluation of mesenteric subcellular and cellular adaptive responses by electron microscopy. The effects of exogenous NaHS (5.6 mg/kg/day for 9 days) versus vehicle on mesentery changes were investigated. Serum glucose level, thiobarbituric acid reactive substances (TBARS), and activities of cystathionine γ-lyase (CSE) and cystathionine β-synthase (CBS), thiosulfate-dithiol sulfurtransferase (TST), and sulfite oxidase (SO) were examined by spectrophotometry. In both adult and aged SD groups, treatment with NaHS protected mesenteric cells after WIRS. In both groups, the treatment with NaHS also protected MA mitochondria, microvascular endothelial and sub-endothelial structures, and fibroblasts versus the vehicle-treated group that had signs of damage. HFD increased MA injury and mitochondrial changes in both aged and adult rats. HFD-associated malfunction is characterized by low activities of CSE, CBS, TST, SO, and increased TBARS. Finally, we demonstrated that pretreatment with NaHS inhibited MA and mitochondria alterations in aged rats exposed to HFD and WIRS, lowered TBARS, and enhanced H2S enzyme activities in contrast to the vehicle-treated group. Mitochondrial integrity alterations, endothelial damage, and redox imbalance are key factors for rat mesenteric adipose tissue damage during advanced age. These alterations and MA hypertrophic changes retain the central for HFD-induced damage. Moreover, H2S signaling contributes to MA and mitochondria redox balance that is crucial for advanced age and HFD injury. The future study of H2S donors’ effects on mesenteric cells is fundamental to define novel therapeutic strategies against metabolic changes.
Aim Multifaceted long COVID caused by SARS-COV-2 affects all populations in the World and takes priority over any other research topics for health care. The purpose of study is to identify physiology-centered risks, prevalence, symptoms and laboratory findings in patients with long COVID in Ukraine. Methods A prospective, cohort study was carried out on 332 patients with long COVID after 4 weeks and more after acute infection COVID-19 from Jul 1, 2021, to Jul 1, 2022. Physiology-centered risks related to age, gender, body mass index (BMI), marital status and educational capacity, smoking, lifestyle, physical activity, and laboratory findings (before disease), and symptom distribution were analyzed. Results The cohort for the study consisted of 166 females and 107 males (mean age = 42; including young 18 (5.4%) and middle- and old-aged adults 314 (96.4%)). Increased BMI was in 61%, and less physical activity—65%. There were 4 clusters of symptoms related to physical, neurocognitive, pulmonary, and pain conditions. 95% of participants had ≥ 3 symptoms. The most common symptoms were fatigue (90%), muscular pain (85%), anosmia (70%), hair loss (70%), sleep disorders (70%), dyspnea (30%), and brain fog (25%). Among laboratory finding increased CRP (92.6%) and fibrinogen (82.7%) dominated. There are no differences between hospitalized and non-hospitalized patients in distribution symptoms. Conclusions The prevalence of long COVID is 23%, and its physiology-centered risk factors are related to age more 38 years, female sex, unhealthy lifestyle, increased BMI, and increased inflammatory markers during COVID-19. The most common symptoms are associated with neurocognitive and pain clusters.
Metabolic physiology plays a key role in maintaining our health and resilience. Metabolic disorders can lead to serious illnesses, including obesity. The pathogenesis of the new long COVID syndrome in individuals with long-term recovery after SARS-Co-2 infection is still incomplete. Thus there is growing attention in the study of adipose tissue activities, especially brown adipose tissue (BAT) and associated resilience which plays a crucial role in different types of obesity as potential targets for pharmacologic and nutritional interventions in the context of obesity and long COVID. The number of studies examining mechanisms underlying BAT has grown rapidly in the last 10 years despite of role of BAT in individuals with COVID-19 and long COVID is modest. Therefore, this review aims to sum up data examining BAT activities, its resilience in health, obesity, and the possible link to long COVID. The search was conducted on studies published in English mostly between 2004 and 2022 in adult humans and animal models. Database searches were conducted using PubMed, Scopus, and Google Scholar for key terms including adipose tissue, BAT, adipokinins, obesity, VPF/VEGF, and pathogenesis. From the initial search through the database were identified relevant articles that met inclusion and exclusion criteria and our data regarding adipose tissues were presented in this review. It will discuss adiposity tissue activities. Current literature suggests that there are BAT integral effects to whitening and browning fat phenomenons which reflect the homeostatic metabolic adaptive ability for environmental demand or survival/adaptive mechanisms. We also review neural and vascular impacts in BAT that play a role in resilience and obesity. Finally, we discuss the role of BAT in the context of long COVID in basic research and clinical research.
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