Low protein status, seen as a low albumin or pre-albumin levels, but also low iron and vitamin E correlated with lower responses to influenza vaccination in the elderly, thereby highlighting the interrelation between various nutrients and the immune response [78]. == 3.1.2. inflammation and oxidative stress, thereby strengthening the immune system during the COVID-19 crisis. Keywords:macronutrients, trace elements, nutrient, protein intake, innate immune system, cytokines, reactive oxygen species, transcription factors, nuclear factors, contamination, coronavirus == 1. Introduction == A cluster of pneumonia cases caused by a previously unknown virus were noted in December 2019, in Wuhan City, China [1]. This virus is now well-known as the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), resulting in the development of the coronavirus disease 2019 (COVID-19) [2]. The disease has spread worldwide and has been classified by the World Health Organization (WHO) as a global pandemic [2,3]. SARS-CoV-2 manifestation might be asymptomatic or moderate to severe with coughing, fever, and shortness of breath [3]. In more severe cases, complications can include acute respiratory distress syndrome, acute cardiac complications, multiple organ dysfunction syndrome, septic shock, and death Mouse monoclonal to CD19.COC19 reacts with CD19 (B4), a 90 kDa molecule, which is expressed on approximately 5-25% of human peripheral blood lymphocytes. CD19 antigen is present on human B lymphocytes at most sTages of maturation, from the earliest Ig gene rearrangement in pro-B cells to mature cell, as well as malignant B cells, but is lost on maturation to plasma cells. CD19 does not react with T lymphocytes, monocytes and granulocytes. CD19 is a critical signal transduction molecule that regulates B lymphocyte development, activation and differentiation. This clone is cross reactive with non-human primate [4,5,6,7]. These complications are believed to be related to what has been described as the cytokine storm, in which viral replication triggers an abnormally strong release of cytokines and other Secalciferol immune-related stimuli, resulting in hyper-inflammation [8]. The outbreak of this emerging infectious disease has been evolving rapidly. Strict national policies to control the disease have been implemented, including policies to practice social distancing and encouraging or even forcing people to stay at home. Especially during this self-confinement, often perceived as stressful, individuals are frequently at a loss regarding optimal dietary patterns and adequate nutrient status in order to stay healthy. In order to prevent contamination, a healthy functional immune system is usually paramount, and an important foundation for an optimal immune response is an adequate and balanced diet [9,10,11,12,13,14]. It is well acknowledged that a low Secalciferol protein status can increase the risk of contamination, related to, for example, low antibody production [15]. An optimal nutritional status is also Secalciferol fundamental to modulate inflammatory and oxidative stress processes, which are all interrelated with the immune system [16]. The important notion of the relationship between dietary constituents, nutrition, inflammation, and oxidative stress is usually well-regarded, and has been emphasized, for example, in the development of the anti-inflammatory dietary index [17]. Dietary and nutritional constituents known to exert anti-inflammatory and antioxidant properties include omega-3 fatty Secalciferol acids [18], vitamin A [19], vitamin C [20], as well as a variety of phytochemicals, such as polyphenols [21] and carotenoids [22] that are widely present in plant-based foods. Also, the dietary fiber present in plant-based food items has been associated with various health benefits including anti-inflammatory properties [11], through fermentation by the gut microbiota and consequent formation of metabolic compounds, especially short chain fatty acids (SCFA). Such anti-inflammatory active compounds could be important in the overall homeostasis of inflammation and oxidative stress, both before and/or during acute contamination. In fact, dietary fiber [23] and a variety of phytochemicals such as polyphenols [24] have been proposed to influence the gut microbiota, having prebiotic effects such as fostering the growth of bacteria that are associated with health benefits, such as ofBifidobacteriumspp., and reducing potential pathogenic ones such asClostridiumspp. Such aspects are of interest as gastro-intestinal complications such as diarrhea have been reported following SARS-CoV-2 contamination [25]. In addition to the interrelation of nutrients and infections via inflammation and oxidative stress, additional pathways may play a Secalciferol role. While the vitamin A metabolite retinoic acid interacts with the transcription factor RAR (retinoic acid receptor), which may play a role in immunity, vitamin D has been proposed to interact with its own transcription factors (vitamin D receptor) or the cellular receptor important for viral entry, i.e., ACE2 (angiotensin converting enzyme 2), inhibiting virus particles.