BackgroundA Panchvalkal formulation (Pentaphyte P-5®) mentioned in ancient texts of Indian traditional medicine was investigated for its anti-infective potential against Pseudomonas aeruginosa.MethodsEffect of the test formulation on bacterial growth and pigment production was evaluated by broth dilution assay. In vivo efficacy was evaluated using Caenorhabditis elegans as the model host. Whole transcriptome approach was taken to study the effect of test formulation on bacterial gene expression.ResultsThis formulation in vitro was found to be capable of affecting quorum sensing (QS)-regulated traits (pyocyanin, pyoverdine, biofilm) of Pseudomonas aeruginosa. In combination with antibiotics, it enhanced susceptibility of the test bacterium to antibiotics like cephalexin and tetracycline. Effect of Panchvalkal formulation (PF) on QS-regulated traits of P. aeruginosa was not reversed even after repeated exposure of the bacterium to PF. In vivo efficacy of PF was demonstrated employing Caenorhabditis elegans as the model host, wherein PF-treated bacteria were able to kill lesser worms than their extract-unexposed counterparts. Whole transcriptome study revealed that approximately 14% of the P. aeruginosa genome was expressed differently under the influence of PF.ConclusionsMajor mechanisms through which Panchvalkal seems to exert its anti-virulence effect are generation of nitrosative and oxidative stress, and disturbing iron and molybdenum homeostasis, besides interfering with QS machinery. This study is a good demonstration of the therapeutic utility of the ‘polyherbalism’ concept, so common in ayurved. It also demonstrates utility of the modern ‘omics’ tools for validating the traditional medicine i.e. ayuromics.Electronic supplementary materialThe online version of this article (10.1186/s12906-019-2428-5) contains supplementary material, which is available to authorized users.
Background In view of the gravity of the problem of antimicrobial resistance among pathogenic bacteria against conventional bactericidal agents, investigation on alternative approaches to combat bacterial infections is warranted. Objective Current study aimed at investigating anti-infective potential of a polyherbal ayurvedic formulation namely panchvalkal against three different pathogenic bacteria. Materials and methods The panchvalkal formulation available as Pentaphyte P5® was tested for its possible in vitro quorum-modulatory potential against Chromobacterium violaceum , Serratia marcescens , and Staphylococcus aureus through broth dilution assay. In vivo efficacy was demonstrated employing Caenorhabditis elegans as the model host for test pathogens. Results This formulation was found to exert quorum-modulatory effect on C. violaceum , S. marcescens , and S. aureus at 250–750 μg/ml. Besides altering production of the quorum sensing-regulated pigments in these bacteria, the test formulation also had in vitro effect on antibiotic susceptibility, catalase activity and haemolytic potential of the pathogens. In vivo assay confirmed the protective effect of this panchvalkal formulation on C. elegans, when challenged with the pathogenic bacteria. Repeated exposure of S. aureus to panchvalkal did not induce resistance in this bacterium. Conclusion To the best of our awareness, this the first report on quorum-modulatory potential of panchvalkal formulation, validating the anti-infective potential and moderate prebiotic property of this polyherbal preparation.
Anti-infective potential of a polyherbal ayurvedic formulation namely panchvalkal was assayed against three pathogenic bacteria. This formulation was found to exert quorum-modulatory effect on Chromobacterium violaceum, Serratia marcescens, and Staphylococcus aureus at 250-750 µg/mL. Besides altering production of the quorum sensing-regulated pigments in these bacteria, the test formulation also had in vitro effect on antibiotic susceptibility, catalase activity and hemolytic potential of the pathogens. In vivo assay confirmed the protective effect of this panchvalkal formulation on Caenorhabditis elegans, when challenged with the pathogenic bacteria. Repeated exposure of S. aureus to panchvalkal did not induce resistance in this bacterium. To the best of our awareness, this the first report on quorum-modulatory potential of panchvalkal formulation, validating the anti-infective potential and moderate prebiotic property of this polyherbal preparation.
Coronavirus disease 2019 (COVID-19) is a respiratory tract infection caused by a newly emergent coronavirus, that was first recognized in Wuhan, China, in December 2019. Genetic sequencing of the virus suggests that it is a beta coronavirus closely linked to the SARS virus. While most people with COVID-19 develop the only mild or uncomplicated illness, approximately 14% develop a severe disease that requires hospitalization and oxygen support, and 5% require admission to an intensive care unit. In severe cases, COVID-19 can be complicated by acute respiratory distress syndrome (ARDS), sepsis and septic shock, multi organ failure, including acute kidney injury and cardiac injury. Reports of the pattern of Covid symptoms suggest that mild fever, cold and cough are the most common symptoms on an average by 5 days after exposure to the virus. Given the current SARS-CoV-2 (COVID-19) pandemic, the availability of reliable information for clinicians and patients is paramount. There have been a number of reports stating that non-steroidal anti-inflammatory drugs (NSAIDs) and corticosteroids may exacerbate symptoms in COVID-19 patients. There is enough literature to prove that many molecules from plants have shown important therapeutic activity with lesser side effects as compared to conventional medicines. Therefore, the present study is aimed to evaluate Plant extracts of proven antiviral activity, which are described as antipyretics and analgesics in classical Ayurvedic texts for their analgesic & antipyretic effect in laboratory animals. Tab. Febcin formulation was selected.
We investigated anti-pathogenic activity of a polyherbal formulation (Enteropan®) against a multidrugresistant strain of Pseudomonas aeruginosa, wherein the nematode worm Caenorhabditis elegans wasemployed as a model host for the bacterial pathogen.
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