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Sequential doxycycline and colchicine combination therapy in Covid-19: The salutary effects.

ABSTRACT: Coronavirus virus disease 2019 (COVID-19) is a viral infectious disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), actually considered as a global pandemic. The entry-point for SARS-CoV-2 is angiotensin converting enzyme 2 (ACE2) and dipeptidyl peptidase 4 (DPP4), which are highly expressed in the lung. Among other complications, COVID-19leads to fatal pneumonia, acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) due to development of cytokine storm (CS). The pathogenesis of SARS-CoV-2 infection depends on the viral load and human innate/adaptive immune response that are required for viral elimination in the first phase of COVID-19. However, an exaggerated immune response in the second phase of COVID-19 results in immune overreaction and CS-induced ALI and ARDS. Thus, in view of these considerations, we report here a series of five patients with COVID-19 pneumonia who developed ALI. In addition to the supportive therapy, the patients received doxycycline in the first week and doxycycline plus colchicine in the second week. Following sequential therapy with doxycycline and/or colchicine in patients with COVID-19 pneumonia, the patients had reduction of disease severity and symptoms with better clinical and radiological outcomes. However, it is tough to confirm the link between this therapeutic combination and recovery from COVID-19 pneumonia, as it is a small case-series report. Nevertheless, this study gives a rational for large-scale prospective studies to evaluate the dual sequential effect of doxycycline and colchicine on the COVID-19 severity. This case-series illustrated that use of colchicine: doxycycline combination is linked with marked improvements in the clinical, laboratory and radiological outcomes in patients with COVID-19 pneumonia. However, we cannot sketch any definitive conclusion from our observation, despite we hypothesize that this combination therapeutic regimen may attenuate and treat COVID-19. Further, namely prospective, randomized, and controlled clinical studies are recommended in this regard.

SUBMITTER: Al-Kuraishy HM

PROVIDER: S-EPMC7955803 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Introduction and objectiveIvermectin (IVM) and doxycycline (DOXY) have demonstrated in-vitro activity against SARS-CoV-2, and have a reasonable safety profile. The objective of this systematic review was to explore the evidence in the literature on the safety and efficacy of their use as monotherapy and combination therapy in COVID-19 management.MethodsAfter prospectively registering the study protocol with the Open Science Framework, we searched PubMed, Google Scholar, clinicaltrials.gov, various pre-print servers and reference lists for relevant records published until 16 February, 2021 using appropriate search strategies. Baseline features and data pertaining to efficacy and safety outcomes were extracted separately for IVM monotherapy, DOXY monotherapy, and IVM + DOXY combination therapy. Methodological quality was assessed based on the study design.ResultsOut of 200 articles screened, 19 studies (six retrospective cohort studies, seven randomised controlled trials, five non-randomised trials, one case series) with 8754 unique patients with multiple stages of COVID-19 were included; four were pre-prints and one was an unpublished clinicaltrials.gov document. The comparator was standard care and 'hydroxychloroquine + azithromycin' in seven and three studies respectively, and two studies were placebo controlled; six studies did not have a comparator. IVM monotherapy, DOXY monotherapy and IVM + DOXY were explored in eight, five and five studies, respectively; one study compared IVM monotherapy and IVM + DOXY with placebo. While all studies described efficacy, the safety profile was described in only six studies. Efficacy outcomes were mixed with some studies concluding in favour of the intervention and some studies displaying no significant benefit; barring one study that described 9/183 patients with erosive esophagitis and non-ulcer dyspepsia with IVM + DOXY (without causality assessment details), there were no new safety signals of concern with any of the three interventions considered. The quality of studies varied widely, with five studies having a 'good' methodological quality.ConclusionsEvidence is not sufficiently strong to either promote or refute the efficacy of IVM, DOXY, or their combination in COVID-19 management.Systematic review protocol registration detailsOpen Science Framework: https://osf.io/n7r2j .

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Sequential doxycycline and colchicine combination therapy in Covid-19: The salutary effects.

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