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Background/objective Centella asiatica, also known as Gotu kola, is a tropical medicinal plant native to Madagascar, Southeast Asia, and South Africa. It is well known to have biological activities, including wound healing, anti-inflammatory, antidiabetic, cytotoxic, and antioxidant effects. The purpose of this study was to determine the efficacy of extracts of C. asiatica against age-related eye degeneration and to examine their physiological activities. Materials/methods To determine the effects of CA-HE50 (C. asiatica 50% EtOH extract) on retinal pigment cells, we assessed the cytotoxicity of CoCl2 and oxidized-A2E in ARPE-19 cells and observed the protective effects of CA-HE50 against N-methyl-N-nitrosourea (MNU)-induced retinal damage in C57BL/6 mice. In particular, we measured factors related to apoptosis and anti-oxidation and the protein levels of rhodopsin/opsin. We also measured glucose uptake to characterize glucose metabolism, a major factor in cell protection. Results Induction of cytotoxicity with CoCl2 and oxidized-A2E inhibited decreases in the viability of ARPE-19 cells when CA-HE50 was administered, and promoted glucose uptake under normal conditions (P less then 0.05). In addition, CA-HE50 inhibited degeneration/apoptosis of the retina in the context of MNU-induced toxicity (P less then 0.05). In particular, CA-HE50 at 200 mg/kg inhibited the cleavage of pro-caspase-3 and pro-poly (ADP-ribose)-polymerase and maintained the expressions of nuclear factor erythroid 2-related factor 2 and heme oxygenase-1 similar to normal control levels. Rhodopsin/opsin expression was maintained at a higher level than in normal controls. Conclusion A series of experiments confirmed that CA-HE50 was effective for inhibiting or preventing age-related eye damage/degeneration. Based on these results, we believe it is worthwhile to develop drugs or functional foods related to age-related eye degeneration using CA-HE50.Background/objectives Brain aging is a major risk factor for severe neurodegenerative diseases. Conversely, L-histidine and L-carnosine are known to exhibit neuroprotective effects. The aim of this study was to examine the potential for L-histidine, L-carnosine, and their combination to mediate anti-brain aging effects in neuronal cells subjected to D-galactose-induced aging. Materials/methods The neuroprotective potential of L-histidine, L-carnosine, and their combination was examined in a retinoic acid-induced neuronal differentiated SH-SY5Y cell line exposed to D-galactose (200 mM) for 48 h. Neuronal cell proliferation, differentiation, and expression of anti-oxidant enzymes and apoptosis markers were subsequently evaluated. Results Treatment with L-histidine (1 mM), L-carnosine (10 mM), or both for 48 h efficiently improved the proliferation, neurogenesis, and senescence of D-galactose-treated SH-SY5Y cells. In addition, protein expression levels of both neuronal markers (β tubulin-III and neurofilament heavy protein) and anti-oxidant enzymes, glutathione peroxidase-1 and superoxide dismutase-1 were up-regulated. Conversely, protein expression levels of amyloid β (1-42) and cleaved caspase-3 were down-regulated. Levels of mRNA for the pro-inflammatory cytokines, interleukin (IL)-8, IL-1β, and tumor necrosis factor-α were also down-regulated. Conclusions To the best of our knowledge, we provide the first evidence that L-histidine, L-carnosine, and their combination mediate anti-aging effects in a neuronal cell line subjected to D-galactose-induced aging. These results suggest the potential benefits of L-histidine and L-carnosine as anti-brain aging agents and they support further research of these amino acid molecules.Background/objectives In this study, we investigated the beneficial effects of skate cartilage extracts containing chondroitin sulfate (SCS) on hyperlipidemia-induced inflammation and oxidative stress in high cholesterol diet (HCD)-fed mice in comparison with the effects of shark cartilage-derived chondroitin sulfate (CS). Materials/methods Low-density lipoprotein receptor knockout (LDLR-KO) mice were fed HCD with an oral administration of CS (50 and 100 mg/kg BW/day), SCS (100 and 200 mg/kg BW/day), or water, respectively, for ten weeks. Results The administration of CS or SCS reduced the levels of serum triglyceride (TG), total cholesterol (TC), and LDL cholesterol and elevated the levels of high-density lipoprotein cholesterol, compared with those of the control group (P less then 0.05). Furthermore, CS or SCS significantly attenuated inflammation by reducing the serum levels of interleukin (IL)-1β and hepatic protein expression levels of nuclear factor kappa B, inducible nitric oxide synthase, cyclooxygenase-2, and IL-1beta (P less then 0.05). In particular, the serum level of tumor necrosis factor-alpha was reduced only in the 100 mg/kg BW/day of SCS-fed group, whereas the IL-6 level was reduced in the 100 and 200 mg/kg BW/day of SCS-fed groups (P less then 0.05). In addition, lipid peroxidation and nitric oxide production were attenuated in the livers of the CS and SCS groups mediated by the upregulation of hepatic proteins of antioxidant enzymes, such as superoxide dismutase, catalase, and glutathione peroxidase (P less then 0.05). Conclusions These results suggest that the biological effects of SCS, similar to those of CS, are attributed to improved lipid profiles as well as suppressed inflammation and oxidative stress induced by the intake of HCD.The Coronavirus disease 2019 (Covid-19) scourge has challenged the world's health systems and presented multiple socio-economic and public health challenges to the states it has affected. Zimbabwe has been affected by the pandemic, and in response, the government has set up an array of measures, including a national lockdown, to curb transmission. While it is critical to maintain such vigorous containment measures, socio-economic pressures in Zimbabwe will challenge the sustainability of the lockdown. Given the potential for lift of the lockdown before the Covid-19 pandemic ends, we discuss the Covid-19 pandemic situation in Zimbabwe and viewpoints on important considerations and strategies for lifting the lockdown.COVID-19 pandemic is an emergent cardiovascular risk factor and a major cause of mortality worldwide. Thromboembolism is highly suspected as a leading cause of death in these patients through vascular inflammation caused by SARS COV2. Until now there is no real treatment of COVID-19 and many proposed drugs are under clinical trials. Considering the high incidence of thromboembolic events in critically ill patients with COVID-19, prevention of this disorder should be essential in order to reduce mortality in these patients.COVID-19 pandemic is an emergent cardiovascular risk factor and a major cause of mortality worldwide. Thromboembolism is highly suspected as a leading cause of death in these patients through vascular inflammation caused by SARS COV2. Until now there is no real treatment of COVID-19 and many proposed drugs are under clinical trials. Considering the high incidence of thromboembolic events in critically ill patients with COVID-19, prevention of this disorder should be essential in order to reduce mortality in these patients.Over the past half century, the Democratic Republic of the Congo (DRC), a low-income and post-conflict country, has experienced several Ebola Virus Disease outbreaks, with different fatality rates. The DRC is currently experiencing the Coronavirus Disease 2019 (COVID-19) pandemic. Using the PEN-3 cultural model, we assessed the socio-cultural factors affecting public trust in the government and its health agencies. Results of this analysis revealed the perceptions, enablers, and nurturers that impacted public trust in the government and its health agencies among the Congolese population. Future interventions designed to address the COVID-19 in the DRC should account for these socio-cultural factors.The epidemic of Coronavirus disease 2019 (COVID-19) in China caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has become a global concern and subsequently labeled a pandemic by the World Health Organization on March 11th. As the world mobilizes to contain the COVID-19, scientists and public health experts are increasingly alarmed about the potentially catastrophic effects of an outbreak in Africa. The establishment of Africa Centres for Disease Control and Prevention by the Africa Union in 2017 was an unprecedented move toward strengthening national responses, so far enabling all fifty member states with confirmed cases of COVID-19 to adequately respond, break chains of transmission and effectively contain the spread of SARS-CoV-2. We enter an uncertain and challenging period that may severely test the preparedness, organizational resource and resilience of African states and the fabric of their societies. However, we speculate that the fear associated with COVID-19 may also lead to some of the long-standing messages about simple measures to reduce the spread, such as hand washing, finally becoming absorbed and more universally adopted by health workers and the public. Is it possible that regardless of the terrible threat posed by SARS-CoV-2, the increased adoption of these health protection measures may result in a reduction in the spread of other infectious diseases?Student self-beliefs regarding intelligence and ability have been shown to correspond to achievement and persistence in an academic domain. Specifically, previous research has suggested that a growth mindset-or the belief that intelligence is malleable and can increase with effort-is associated with student success. LHistidinemonohydrochloridemonohydrate Locus of control is a related but distinct self-belief regarding personal agency over various academic and nonacademic outcomes and has also been associated with study skills and academic persistence. However, academic interventions targeting student mindsets and loci of control have remained relatively underexplored, specifically in the context of undergraduate STEM education. Here, we describe the development and assessment of an intervention encouraging students to adopt a growth mindset and internal locus of control. This five-part intervention is administered entirely online and is therefore independent of individual instructor variability. We administered the intervention in five introductory biology courses and show that the intervention was successful in impacting student mindsets and loci of control across various demographics.Day 1 Watershed (WS) is a first-year program designed to provide an inclusive environment for students and immerse them in research from day 1 of college. Originally developed to support students from underrepresented groups (URGs) including first-generation students and students of color, WS provides authentic research experiences for all students as they collect and analyze water and microbiological samples from the local watershed. WS also includes a living-learning community with students living in the same dorm and taking common courses during their first year. In the first year of our study, researchers investigated students' anxieties, feelings of belonging or isolation, supports received, and personal habits. In year 2 (the primary year reported), researchers used mixed-methods and self-determination theory to determine how WS students differed from students in other introductory and research-based courses in terms of basic psychological needs satisfaction (including autonomy, competence, and relatedness).
Homepage: https://www.selleckchem.com/products/l-histidine-monohydrochloride-monohydrate.html
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