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Bee-collected pollen and bee bread, particularly when artificially fermented, demonstrate significant antiviral activity against the H1N1 strain of the influenza A virus.
The research investigated the antiviral properties of bee-collected pollen (BCP) and bee bread (BB), including versions that had undergone artificial fermentation. The experiment also assessed separate proteins, water content, and -butanol portions of these substances. The analysis evaluated their effectiveness against the H1N1 strain of the influenza A virus (IAV). The antiviral behavior of these materials was taken in lab conditions via a comparative real-time PCR analysis working on their inhibitory concentration and selectivity index.
The outcomes revealed artificial fermentation improved the antiviral effectiveness of BCP. The protein fractions within the BCP and BB presented the greatest antiviral activity. Observations also highlighted that the chemical composition, prominent in proteins, and potentially microbiome metabolism determined the antiviral properties of BCP and BB. The chemical profile analysis emphasized the existence of some specialized metabolites that might be contributing towards this antiviral action.
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Green tea consumption has been found to be effective in preventing the contraction of influenza infections.
2021 Molecules Anti-Influenza with Green Tea Catechins: A Systematic Review and Meta-Analysis Rawangkan A, Kengkla K, Kanchanasurakit S, Duangjai A, Saokaew S
Systematic Review Antiviral Green Tea Influenza
To identify the potential benefits of green tea in influenza prevention, a methodical review and combined analysis of eight distinct research studies involving 5,048 participants was completed. The effect of green tea catechin treatment was tested against control conditions and assessed based on infection rates. Five of these studies were randomized controlled trials involving 884 participants and three were cohort studies with 2,223 participants. Subgroups such as those who gargled or took orally ingested forms of green tea were also analyzed separately. Further to this, the possibility of publication biases was evaluated using Begg's and Egger's tests.
The results showed both the randomized trials and the cohort studies displayed significant preventative effects on influenza infection for those treated with green tea catechins. Notably, there was no evidence of non-uniformity within the data, reinforcing these findings. The pooled results of different consumption methods further supported these findings, showing no disparities among the subgroups. These results suggest the consumption of green tea has tangible prophylactic effects against influenza infection.
Bee honey and propolis could have potential beneficial effects as supporting treatments for COVID-19, enhancing immunity and inhibiting viral activity.
2021 Molecules Propolis, Bee Honey, and Their Components Protect against Coronavirus Disease 2019 (COVID-19): A Review of In Silico, In Vitro, and Clinical Studies Ali AM, Kunugi H
Review Article Anti-Inflammatory Antiviral COVID-19
The study's methodology involved a comprehensive review of the literature on the potential anti-COVID-19 effects of bee honey and propolis, products known for their strong antimicrobial and antioxidant abilities. The researchers conducted molecular simulations to see how various flavonoids found in these products might inhibit essential viral processes. Additionally, they compared the effectiveness of propolis extracts delivered by nanocarriers to ethanolic extracts, and they examined the effects of a combination of honey and propolis on hospitalized COVID-19 patients.
The findings from the review and simulations suggested that certain flavonoids in honey and propolis may inhibit the fusion of the virus spike with host cells, interactions that cause a cytokine storm, and viral replication. Propolis ethanolic extract, rutin, and propolis liposomes displayed inhibitory action against non-structural proteins of the virus in vitro while naringin inhibited viral infection in specific cells. When delivered via nanocarriers, propolis extracts showed enhanced antiviral effects against the virus compared to ethanolic extracts. Observations of hospitalized patients suggested that those treated with green Brazilian propolis or a honey-propolis combination experienced quicker viral clearance, symptom recovery, and hospital discharge, along with lower mortality rates.
Honey's phytochemical components and bioactive compounds have potential antiviral effects, potentially making it an effective natural product against COVID-19.
2020 Molecules Antiviral and Immunomodulatory Effects of Phytochemicals from Honey against COVID-19: Potential Mechanisms of Action and Future Directions Al-Hatamleh MAI, Hatmal MM, Sattar K, Ahmad S, Mustafa MZ, Bittencourt MDC, et al.
Review Article Antiviral COVID-19 Honey
The methodology of this research utilizes a comprehensive review and analysis of existing literature regarding the antiviral effects and phytochemical components of honey. Previous studies have indicated that certain bioactive compounds present in honey, such as methylglyoxal, chrysin, caffeic acid, galangin, hesperidin, levan, and ascorbic acid, may exhibit antiviral effects or stimulate the body's antiviral immune responses.
Through thorough examination of past works, the researchers isolated and focused on these compounds, exploring their potential utility in the context of COVID-19, a novel coronavirus that currently lacks established preventative or treatment measures.
The results of the analysis pointed towards the efficacy of honey's bioactive compounds, which were found to potentially display both direct antiviral effects and the promotion of antiviral immune responses. However, the precise mechanisms by which these compounds exert their antiviral activity, particularly against SARS-CoV-2, remain largely unclear. Despite these ambiguities, the research established honey as a fruitful field of study for potential therapeutic material against the novel coronavirus disease.
Tea catechins, found in green tea, may reduce the rates of influenza infection and diminish certain cold symptoms.
2018 Molecules Effect of Tea Catechins on Influenza Infection and the Common Cold with a Focus on Epidemiological/Clinical Studies Furushima D, Ide K, Yamada H
Review Article Antiviral Common Cold Green Tea
The research methodology started with interpreting several experimental studies which reported that tea catechins can inhibit influenza viral adsorption and suppress replication and neuraminidase activity. These catechins were also found effective against some common cold viruses and helped to enhance immunity against such viral infections. Additionally, epidemiological studies conducted since the late 1990s were examined which suggested that regular consumption of green tea may decrease influenza infection rates and some cold symptoms, and gargling with tea catechin could potentially protect against the development of influenza infection.
For the discussion of results, the studies collectively showed that tea catechins have potential antiviral activity against influenza and some cold viruses. Although clinical evidence supporting these effects remained unconclusive, the review showed promising trends. The consumption of green tea and gargling with tea catechins could lead to potentially decreased rates of influenza infection and lessened cold symptoms according to the analyzed epidemiological studies.
Honey, in general, and particularly manuka honey, has potent inhibitory activity against the influenza virus, demonstrating a potential medicinal value.
2014 Archives of Medical Research Anti-influenza Viral Effects of Honey In Vitro: Potent High Activity of Manuka Honey Watanabe K, Rahmasari R, Matsunaga A, Haruyama T, Kobayashi N
Network Pharmacology Antiviral Honey Influenza
Antiviral activities of honey samples were evaluated using MDCK cells. To elucidate the possible mechanism of action of honey, plaque inhibition assays were used. Synergistic effects of honey with known anti-influenza virus drugs such as zanamivir or oseltamivir were tested.
Manuka honey efficiently inhibited influenza virus replication (IC50 = 3.6 ± 1.2 mg/mL; CC50 = 82.3 ± 2.2 mg/mL; selective index = 22.9), which is related to its virucidal effects. In the presence of 3.13 mg/mL manuka honey, the IC50 of zanamivir or oseltamivir was reduced to nearly 1/1000th of their single use.
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