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1.
Oxf Med Case Reports ; 2022(10): omac112, 2022 Oct.
Article in English | MEDLINE | ID: covidwho-2087823

ABSTRACT

In regions endemic to both COVID-19 and dengue, cases of coinfections are possible. Since they have similar clinical presentations, but management might be different, it is crucial to identify these cases of coinfections. We diagnosed seven cases of dengue-COVID-19 coinfections. Fever, myalgia, rash and thrombocytopenia were found to be the common features. All patients recovered well with supportive treatment. We report this series to highlight the possibility of rare coinfections in endemic areas and the importance of a high index of suspicion, early diagnosis and prompt management.

2.
Infez Med ; 30(3): 432-439, 2022.
Article in English | MEDLINE | ID: covidwho-2033632

ABSTRACT

Introduction: Liposomal amphotericin use is limited in developing countries due to its extremely high cost and availability. Therefore, the study aimed to evaluate deoxycholate amphotericin B's utility and adverse effect profile in patients with mucormycosis. Methodology: This retrospective cohort study from 2019 to 2021 included patients with proven mucormycosis who received deoxycholate amphotericin B for more than or equal to five days and had at least three creatinine values on treatment. Baseline demographic details, risk factors and treatment details of all the patients were recorded. In addition, the details of treatment-related adverse effects and outcomes were ascertained. Results: Of the 57 included patients, a history of diabetes, COVID-19 and steroid use was present in 49 (86%), 43 (75.4%) and 33 (57.9%) patients, respectively. Isolated rhino-orbital mucormycosis was the most common presentation (n=49, 86%). The median time of follow-up was 48 (30.5-90) days. A total of 8 (14%) patients died during the hospital stay. The median duration of amphotericin treatment was 21 (14-40) days. Thirty-nine patients (68.4%) developed hypokalaemia on treatment, while 27 (47.4%) patients developed hypomagnesaemia. A total of 34 (59.6%) patients developed AKI on treatment. The median day of development of AKI was 6 (4-10) days. The median baseline, highest and final creatinine values were 0.78 (0.59-0.94) mg/dl, 1.27 (0.89-2.16) mg/dl and 0.93 (0.74-1.59) mg/ dl respectively. The median percentage change from baseline to highest value and last follow-up value was 45% (0.43%-161%) and 25% (-4.8%-90.1%) respectively. The final creatinine was less than 150% of the baseline in 36 (63.2%) patients. Conclusion: Deoxycholate amphotericin is an acceptable alternative for treating mucormycosis in resource-constrained settings.

3.
Indian J Palliat Care ; 28(3): 272-279, 2022.
Article in English | MEDLINE | ID: covidwho-1998154

ABSTRACT

Objectives: Palliative care (PC) referral in serious and critical COVID-19 improves decision-making, health resource utilisation, end-of-life symptom management and family support. In this study, we explored developing a systematic decision-making matrix for PC referral in COVID-19 and audited its outcomes. Materials and Methods: A team of interdisciplinary experts developed a hospital COVID-19 PC plan. PC referral and outcomes of PC referral in hospitalised COVID-19 patients were audited. Results: Out of 1575 inpatients, 1066 (67.7%) had mild and 509 (32.3%) had serious and critical COVID-19 illness. Among 50 (3.1%) referred to PC, 5 (0.4%) had mild and 45 (8.8%) had serious and critical COVID-19 illness. Out of 45 serious and critical COVID-19 patients referred to PC, 38 (84%) received end-of-life care (EOLC), 4 (9%) self-discharged against medical advice and 3 (7%) recovered. Forty-seven (94%) were referred for goals-of-care discussion. About 78% received opioids, 70% benzodiazepines and 42% haloperidol for symptom management. Among 45 serious and critical COVID-19 patients referred to PC, foregoing life-sustaining treatment was documented in 43 (96%) but implemented only in 23 (53%). Out of 38 who received EOLC, ICU was the place of death in 31 (82%) and ward in 7 (18%). Conclusion: Despite interdisciplinary experts developing a hospital COVID-19 PC, low referral of serious and critical COVID-19 patients to PC was observed. PC referral enabled access to management of end-of-life symptoms and facilitated limitation of life-sustaining treatment in some COVID-19 patients with serious illness. Educating critical care physicians about the scope of PC in the COVID-19 setting might improve PC referral.

4.
J Med Virol ; 94(9): 4508-4511, 2022 09.
Article in English | MEDLINE | ID: covidwho-1802460

ABSTRACT

During the monsoon season of 2020, the coastal areas of South India were endemic to both leptospirosis and coronavirus disease 2019 (COVID-19). This study aimed to investigate the clinical features and outcomes of patients infected with both infections. A retrospective review of charts of all patients with COVID-19 who were also diagnosed with leptospirosis by immunoglobulin M enzyme-linked immunosorbent assay was undertaken. The clinical features, laboratory report, treatment details, and outcomes of all the included patients were recorded. The collected data were summarized as the frequency with percentage for categorical data and the mean or median for continuous data. Twenty-four cases of coinfections were admitted between July and November 2020. Most of these patients were categorized as severe COVID-19 (n = 15, 62.5%). Acute kidney injury was seen in 79.2% (n = 19) patients, while raised bilirubin was present in 79.2% (n = 19) of the patients. All patients had raised C-reactive protein, while all but one had raised procalcitonin. Thrombocytopenia, leucocytosis, and leukocytopenia were seen in 91.7% (n = 22), 45.8% (n = 11), and 12.5% (n = 3) of the patients. The median duration of hospital stay was 11 (8.25-15) days. A total of 79.2% (n = 19) of the patients improved and were discharged, while 20.8% (n = 5) died during the hospital stay. In conclusion, patients with fever and atypical manifestations such as hepatic dysfunction, renal dysfunction, and thrombocytopenia should be evaluated for leptospirosis even if they are COVID positive.


Subject(s)
COVID-19 , Coinfection , Leptospirosis , Thrombocytopenia , COVID-19/complications , Coinfection/epidemiology , Humans , India/epidemiology , Leptospirosis/complications , Leptospirosis/diagnosis , Leptospirosis/epidemiology , Retrospective Studies
5.
BMC Infect Dis ; 22(1): 107, 2022 Jan 31.
Article in English | MEDLINE | ID: covidwho-1662411

ABSTRACT

BACKGROUND: Coronavirus disease 2019 (COVID-19) continues to pose a significant threat to public health worldwide. The purpose of this study was to review current evidence obtained from randomized clinical trials on the efficacy of antivirals for COVID-19 treatment. METHODS: A systematic literature search was performed using PubMed to identify randomized controlled trials published up to September 4, 2021 that examined the efficacy of antivirals for COVID-19 treatment. Studies that were not randomized controlled trials or that did not include treatment of COVID-19 with approved antivirals were excluded. Risk of bias was assessed using the Scottish Intercollegiate Guidelines Network (SIGN) method. Due to study heterogeneity, inferential statistics were not performed and data were expressed as descriptive statistics. RESULTS: Of the 2,284 articles retrieved, 31 (12,440 patients) articles were included. Overall, antivirals were more effective when administered early in the disease course. No antiviral treatment demonstrated efficacy at reducing COVID-19 mortality. Sofosbuvir/daclatasvir results suggested clinical improvement, although statistical power was low. Remdesivir exhibited efficacy in reducing time to recovery, but results were inconsistent across trials. CONCLUSIONS: Although select antivirals have exhibited efficacy to improve clinical outcomes in COVID-19 patients, none demonstrated efficacy in reducing mortality. Larger RCTs are needed to conclusively establish efficacy.


Subject(s)
COVID-19 , Antiviral Agents/therapeutic use , COVID-19/drug therapy , Humans , Randomized Controlled Trials as Topic , SARS-CoV-2
6.
Infez Med ; 29(3): 393-401, 2021.
Article in English | MEDLINE | ID: covidwho-1444693

ABSTRACT

Leptospirosis is a rodent-borne acute febrile illness, classically seen after heavy rainfall and floods. This study aimed to describe the clinical profile, management strategies and outcome of patients with leptospirosis amidst the Coronavirus disease-2019 outbreak. A prospective study of adult patients with undifferentiated fever (5-15 days) was conducted in South India between October 2020 and February 2021. The demographic, clinical details, laboratory details, treatment and outcome of leptospirosis positive (based on serology) and negative patients were compared. A chisquare test was used for qualitative variables, while an independent t-test or Mann Whitney U test was used for continuous variables. Of the 206 patients with suspected acute febrile illness, a total of 63 patients were diagnosed with leptospirosis based on serology results. The median sequential organ failure assessment score was higher in those with leptospirosis (p<0.001). Myalgia, abdominal pain, jaundice, decreased urine output, myocarditis, and dialysis requirement were more common in patients with leptospirosis. Leucocytosis and raised procalcitonin/C-reactive protein were more common in patients with leptospirosis. The duration of stay and antibiotic consumption was higher in patients with leptospirosis. Acute febrile illness such as leptospirosis should be suspected in tropical areas with significant risk factors. The presence of conjunctival suffusion, hepatic and renal dysfunction should warrant a serology test for leptospirosis.

7.
Medicine (Baltimore) ; 100(20): e25719, 2021 May 21.
Article in English | MEDLINE | ID: covidwho-1236278

ABSTRACT

BACKGROUND: Corticosteroid treatment is an effective and common therapeutic strategy for various inflammatory lung pathologies and may be an effective treatment for coronavirus disease 2019 (COVID-19). The purpose of this systematic review and meta-analysis of current literature was to investigate the clinical outcomes associated with corticosteroid treatment of COVID-19. METHODS: We systematically searched PubMed, medRxiv, Web of Science, and Scopus databases through March 10, 2021 to identify randomized controlled trials (RCTs) that evaluated the effects of corticosteroid therapies for COVID-19 treatment. Outcomes of interest were mortality, need for mechanical ventilation, serious adverse events (SAEs), and superinfection. RESULTS: A total of 7737 patients from 8 RCTs were included in the quantitative meta-analysis, of which 2795 (36.1%) patients received corticosteroids plus standard of care (SOC) while 4942 (63.9%) patients received placebo and/or SOC alone. The odds of mortality were significantly lower in patients that received corticosteroids as compared to SOC (odds ratio [OR] = 0.85 [95% CI: 0.76; 0.95], P = .003). Corticosteroid treatment reduced the odds of a need for mechanical ventilation as compared to SOC (OR = 0.76 [95% CI: 0.59; 0.97], P = .030). There was no significant difference between the corticosteroid and SOC groups with regards to SAEs and superinfections. CONCLUSION: Corticosteroid treatment can reduce the odds for mortality and the need for mechanical ventilation in severe COVID-19 patients.


Subject(s)
Adrenal Cortex Hormones/therapeutic use , COVID-19/drug therapy , COVID-19/mortality , Humans , Odds Ratio , Randomized Controlled Trials as Topic , Respiration, Artificial/statistics & numerical data , SARS-CoV-2 , Treatment Outcome
8.
Indian J Crit Care Med ; 25(5): 535-539, 2021 May.
Article in English | MEDLINE | ID: covidwho-1229406

ABSTRACT

INTRODUCTION: Coronavirus disease-2019 (COVID-19) pandemic has overloaded the healthcare system beyond its functional capacity. Late referral to higher levels of care may be one of the factors associated with higher mortality. Therefore, we aimed to find simple demographic and laboratory parameters which predict the requirement of admission to a critical care unit. MATERIALS AND METHODS: A case-control study was undertaken in adult age population >18 years, admitted in a dedicated COVID hospital in South India. A total of 50 patients with severe disease (cases) were compared with 143 mild or asymptomatic cases (controls). Those demographic and laboratory parameters that were found to be significant on univariate analysis were used for multiple logistic regression analysis. RESULTS: Univariate analysis of demographic and laboratory data showed higher age, male sex, presence of diabetes mellitus, higher values of C-reactive protein, ferritin, D-dimer, neutrophil-lymphocyte ratio (NLR), and lactate dehydrogenase to be significantly associated with cases. Multivariate logistic regression analysis of these significant variables showed NLR and ferritin to be the independent predictors of the requirement of admission to a critical care unit. The receiver-operating characteristic curve showed an NLR value of 5.2 and a ferritin value of 462 µg/L that were able to predict the requirement of admission in critical care units. CONCLUSION: High ferritin and NLR were independent predictors of the requirement of admission in critical care units. NLR is a simple tool that can be used in resource-limited settings for triage and early referral to higher levels of care. HOW TO CITE THIS ARTICLE: Maddani SS, Gupta N, Umakanth S, Joylin S, Saravu K. Neutrophil-Lymphocyte Ratio in Patients with COVID-19 as a Simple Tool to Predict Requirement of Admission to a Critical Care Unit. Indian J Crit Care Med 2021;25(5):535-539.

9.
Arch Med Res ; 52(6): 582-594, 2021 08.
Article in English | MEDLINE | ID: covidwho-1141618

ABSTRACT

Saving lives and flattening the curve are the foremost priorities during the ongoing pandemic spread of SARS-CoV-2. Developing cutting-edge technology and collating available evidence would support frontline health teams. Nutritional adequacy improves general health and immunity to prevent and assuage infections. This review aims to outline the potential role of probiotics in fighting the COVID-19 by covering recent evidence on the association between microbiota, probiotics, and COVID-19, the role of probiotics as an immune-modulator and antiviral agent. The high basic reproduction number (R0) of SARS-CoV-2, absence of conclusive remedies, and the pleiotropic effect of probiotics in fighting influenza and other coronaviruses together favour probiotics supplements. However, further support from preclinical and clinical studies and reviews outlining the role of probiotics in COVID-19 are critical. Results are awaited from many ongoing clinical trials investigating the benefits of probiotics in COVID-19.


Subject(s)
COVID-19 , Probiotics , COVID-19/prevention & control , COVID-19/therapy , Dietary Supplements , Humans , Pandemics , Probiotics/therapeutic use
10.
Drug Discov Ther ; 15(1): 1-8, 2021 Mar 10.
Article in English | MEDLINE | ID: covidwho-1110629

ABSTRACT

Despite the high number of coronavirus disease-19 (COVID-19) cases from India, there are few reports from India describing the clinical epidemiology of COVID-19. This study aimed to describe the clinical/epidemiological characteristics and outcomes of asymptomatic vs. symptomatic COVID-19 patients. This was a retrospective chart review of all admitted patients with COVID-19 above 18 years with a history of travel within one month of the admission. The patients were categorized into asymptomatic and symptomatic. The symptomatic patients were further classified into mild, moderate and severe. The demographic profile, risk factors, clinical features, laboratory parameters, treatment details and outcome of all patients were recorded. The clinical and laboratory parameters were compared between symptomatic patients and asymptomatic patients. Of the 127 recruited patients, 75 were asymptomatic. Of the 52 symptomatic patients, 41 patients were classified as a mild illness. The mean age of the patients was 44.5 ± 15 years. A total of 73 patients had one or more risk factors. The male patients were more commonly found to be symptomatic compared to female patients. Neutrophil-lymphocyte ratio, C-reactive protein and lactate dehydrogenase were significantly elevated in symptomatic patients. A total of five individuals required supplemental oxygen therapy, and one of them required mechanical ventilation. All the patients had favourable outcomes. Asymptomatic and mild illness form a significant proportion of positive patients and have excellent outcomes without therapeutic interventions.


Subject(s)
Asymptomatic Infections/epidemiology , COVID-19/epidemiology , COVID-19/therapy , Communicable Diseases, Imported/epidemiology , Communicable Diseases, Imported/therapy , Adult , C-Reactive Protein/metabolism , COVID-19/blood , Communicable Diseases, Imported/blood , Communicable Diseases, Imported/virology , Female , Hospitalization/statistics & numerical data , Humans , India/epidemiology , L-Lactate Dehydrogenase/blood , Lymphocyte Count , Male , Middle Aged , Neutrophils/metabolism , Oxygen Inhalation Therapy , Prognosis , Respiration, Artificial , Retrospective Studies , Travel-Related Illness , Young Adult
11.
J Clin Apher ; 36(3): 470-482, 2021 Jun.
Article in English | MEDLINE | ID: covidwho-1064370

ABSTRACT

The purpose of this systematic review and meta-analysis was to examine clinical outcomes associated with convalescent plasma therapy in COVID-19 patients. We performed a literature search on PubMed, medRxiv, Web of Science, and Scopus to identify studies published up to December 10th, 2020 that examined the efficacy of convalescent plasma treatment for COVID-19. The primary endpoints were mortality, clinical improvement, and hospital length of stay. We screened 859 studies that met the search criteria, performed full-text reviews of 56 articles, and identified 15 articles that fulfilled inclusion criteria for meta-analysis. The odds of mortality were significantly lower in the convalescent plasma group compared to the control group (OR = 0.59 [95% CI = 0.44; 0.78], P < .001), although results from two key randomized controlled trials did not support the mortality benefit. The odds of clinical improvement were significantly higher in the convalescent plasma group compared to the control group (OR = 2.02 [95% CI = 1.54; 2.65], P < .001). There was no difference in hospital length of stay between the convalescent plasma group and the control group (MD = -0.49 days [95% CI = -3.11; 2.12], P = .713). In all, these data indicate that a mortality benefit with convalescent plasma is unclear, although there remain benefits with convalescent plasma therapy for COVID-19.


Subject(s)
COVID-19/therapy , COVID-19/mortality , Humans , Immunization, Passive/methods , Length of Stay , Plasma , Quality Assurance, Health Care , Risk , Treatment Outcome
12.
Ann Med Surg (Lond) ; 62: 43-48, 2021 Feb.
Article in English | MEDLINE | ID: covidwho-1009287

ABSTRACT

PURPOSE: To perform a systematic review and meta-analysis of randomized controlled trials that examined remdesivir treatment for COVID-19. MATERIALS AND METHODS: A systematic literature search was performed using Pubmed, Embase, and ClinicalTrials.gov to identify studies published up to October 25, 2020 that examined COVID-19 treatment with remdesivir. A total of 3 randomized controlled trials that consisted of 1691 patients were included in the meta-analysis. RESULTS: The odds for mechanical ventilation (MV) or extracorporeal membrane oxygenation (ECMO) following treatment was significantly lower in the remdesivir group compared to the control group (OR = 0.48 [95% CI: 0.34; 0.69], p < 0.001). The odds of early (at day 14/15; OR = 1.42 [95% CI: 1.16; 1.74], p < 0.001) and late (at day 28/29; OR = 1.44 [95% CI: 1.16; 1.79], p = 0.001) hospital discharge were significantly higher in the remdesivir group compared to the control group. There was no difference in the odds for mortality in patients treated with remdesivir (OR = 0.77 [95% CI: 0.56; 1.06], p = 0.108). CONCLUSIONS: Remdesivir attenuates disease progression, leading to lower odds of MV/ECMO and greater odds of hospital discharge for COVID-19 patients. However, remdesivir does not affect odds of mortality.

13.
J Trop Pediatr ; 67(1)2021 01 29.
Article in English | MEDLINE | ID: covidwho-960586

ABSTRACT

The susceptibility of children to coronavirus disease-19 (COVID-19) and transmission of COVID-19 from children to others is a relatively unexplored area. The aim of this study was to understand the transmission dynamics of Severe Acute Respiratory Syndrome Coronavirus 2 in children. This was a retrospective observational study where a total of 19 paediatric index cases (including a set of twins) with COVID-19 and 42 primary contacts (adults-36, paediatric-6) from the immediate family members were included. All the index cases and four of the five positive contacts were asymptomatic. Despite adults staying with positive children in the same vehicle, same room in the quarantine centre and the same ward, only four of the parents became positive.


Subject(s)
Asymptomatic Infections , COVID-19/transmission , Adult , Carrier State , Child , Family , Humans , India/epidemiology , Retrospective Studies
14.
Expert Rev Anti Infect Ther ; 19(6): 679-687, 2021 06.
Article in English | MEDLINE | ID: covidwho-927085

ABSTRACT

Objectives: To systematically review the clinical literature reporting the use of Lopinavir/ritonavir (LPV/r) for the treatment of patients with Cornonavirus disease 19 (COVID-19) to assess the efficacy of LPV/r for the treatment of COVID-19.Methods: The authors systematically searched PubMed and MedRxiv databases for studies describing treatment of COVID-19 patients using LPV/r compared to other therapies. Articles were excluded if they were case reports, opinion editorials, preclinical studies, single-armed studies, not written in English, not relevant to the topic, or published before May 2020. The included outcomes were viral clearance as measured by reverse-transcription polymerase chain reaction (RT-PCR) negativity and/or improvement on chest computed tomography (CT), mortality, and adverse events.Results: Among 858 total studies, 16 studies met the inclusion criteria and were included in the qualitative review. These studies consisted of 3 randomized control trials, 3 open-label trials, and 10 observational studies. Most of these studies did not report positive clinical outcomes with LPV/r treatment.Conclusion: The systematic review revealed insufficient evidence of effectiveness and clinical benefit of LPV/r in the treatment of COVID-19 patients. Specifically, LPV/r does not appear to improve clinical outcome, mortality, time to RT-PCR negativity, or chest CT clearance in patients with COVID-19.


Subject(s)
Antiviral Agents/therapeutic use , COVID-19/drug therapy , Lopinavir/therapeutic use , Ritonavir/therapeutic use , SARS-CoV-2/drug effects , Antiviral Agents/administration & dosage , Drug Combinations , Humans , Lopinavir/administration & dosage , Lopinavir/adverse effects , Ritonavir/administration & dosage , Ritonavir/adverse effects , Treatment Outcome
15.
J Am Coll Nutr ; 40(7): 632-645, 2021.
Article in English | MEDLINE | ID: covidwho-739112

ABSTRACT

Vitamin D deficiency (VDD) partly explains geographical differences in COVID-19 susceptibility, severity, and mortality. VDD among African-Americans, diabetics, hypertensive, and aged populations possibly explain the higher death rate, aggravated by cocooning. Vitamin D is pleiotropic, mediating bone metabolism, calcium homeostasis, and immune functions, whereas VDD is associated with inflammatory reactions and immune dysfunction, predisposing individuals to severe infections. Vitamin D modulates innate and adaptive immunity via the expression of genes that code antimicrobial peptides (AMPs). And the expression of cluster of differentiation (CD)14, the co-receptor for epidermal toll-like receptor (TLR)4. AMPs stimulate TLR2 in macrophages, increasing the conversion of vitamin D into its active form by cytochrome P450 27B1. Antiviral properties of vitamin D-induced AMPs can shift the polarization of the adaptive immune response from helper T cells (Th)1 to the more regulatory Th2 responses that suppress immune over-reactivity by preventing cytokine storm, which is already demonstrated during the Spanish flu episode. Vitamin D induces antiviral effects by both direct and indirect mechanisms via AMPs, immunomodulation, the interplay between major cellular and viral elements, induction of autophagy and apoptosis, variation of genetic and epigenetic factors. The crosstalk between vitamin D and intracellular signaling pathways may operate as a primary regulatory action on viral gene transcription. VDD may increase the likelihood of infection with enveloped viruses, including retrovirus, hepatitis, and dengue. Global data correlates severe VDD with COVID-19 associated coagulopathy, disrupted immune response and mortality, reduced platelet count, and prolonged prothrombin time, suggesting benefits from supplementation.Key teaching pointsVitamin D induces antiviral effects by direct and indirect mechanisms via AMPs, immunomodulation, induction of autophagy, etc.Epidemiology of VDD partly explains geographical differences in COVID-19 susceptibility, severity, and mortality.Global data correlates severe VDD with COVID-19 associated coagulopathy, disrupted immune response and mortality, reduced platelet count, and prolonged prothrombin time, together suggesting benefits from supplementation.Many clinical trials are underway globally to delineate the role of vitamin D in both prevention and treatment of COVID-19.


Subject(s)
COVID-19 , Influenza Pandemic, 1918-1919 , Vitamin D Deficiency , Aged , Humans , SARS-CoV-2 , Vitamin D , Vitamin D Deficiency/drug therapy , Vitamin D Deficiency/prevention & control
16.
Med Chem ; 17(4): 380-395, 2021.
Article in English | MEDLINE | ID: covidwho-688767

ABSTRACT

BACKGROUND: Globally, over 4.3 million laboratory confirmed cases of COVID-19 have been reported from over 105 countries. No FDA approved antiviral is available for the treatment of this infection. Zhavoronkov et al., with their generative chemistry pipeline, have generated structures that can be potential novel drug-like inhibitors for COVID-19, provided they are validated. 3C-like protease (3CLP) is a homodimeric cysteine protease that is present in coronaviruses. Interestingly, 3CLP is 96.1% structurally similar between SARS-CoV and SARS-CoV-2. OBJECTIVE: To evaluate interaction of generated structures with 3CLP of SARS-CoV (RCSB PDB ID: 4MDS). METHODS: Crystal structure of human SARS-CoV with a non-covalent inhibitor with resolution: 1.598 Å was obtained and molecular docking was performed to evaluate the interaction with generated structures. The MM-GBSA and IFD-SP were performed to narrow down to the structures with better binding energy and IFD score. The ADME analysis was performed on top 5 hits and further MD simulation was employed for top 2 hits. RESULTS: In XP docking, IFD-SP and molecular dynamic simulation studies, the top 2 hits 32 and 61 showed interaction with key amino acid residue GLU166. Structure 61, also showed interaction with HIS164. These interactions of generated structure 32 and 61, with GLU166 and HIS164, indicate the binding of the selected drug within the close proximity of 3CLP. In the MD simulation, the protein- ligand complex of 4MDS and structure 61 was found to be more stable for 10ns. CONCLUSION: These identified structures can be further assessed for their antiviral activity to combat SARS-CoV and COVID-19.


Subject(s)
Antiviral Agents/chemistry , Coronavirus 3C Proteases/antagonists & inhibitors , Protease Inhibitors/chemistry , SARS-CoV-2/chemistry , Small Molecule Libraries/chemistry , Antiviral Agents/metabolism , COVID-19/drug therapy , Catalytic Domain , Coronavirus 3C Proteases/chemistry , Coronavirus 3C Proteases/metabolism , Drug Discovery , Humans , Molecular Docking Simulation , Molecular Dynamics Simulation , Protease Inhibitors/metabolism , Protein Binding , Protein Conformation , Protein Interaction Domains and Motifs , SARS Virus/chemistry , SARS Virus/enzymology , SARS-CoV-2/enzymology , Small Molecule Libraries/metabolism , Structural Homology, Protein , Structure-Activity Relationship , Substrate Specificity , Thermodynamics , User-Computer Interface
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