View clinical trials related to Covid19.
Filter by:Combination of Chemopreventive agents (All- Trans Retinoic Acid and Tamoxifen) as potential treatment for the Lung Complication of COVID-19 Abstract Angiotensin-converting enzyme (ACE2) protein found on the cell membranes is the target of SARS-CoV-2 for entering into the host cells. Viral spike protein-binding with ACE2 down-regulates it. As ACE2 is known to protect the lung from injuries, SARS-CoV-2-induced ACE2 deficiency may expose patients to lung damage. In this Review, we use established and emerging evidence based on the findings of previous studies and researches to propose a testable hypothesis that Combination of chemopreventive agents (All Trans Retinoic acid and Tamoxifen) can be tested to prevent inflammatory complication in severe acute respiratory syndrome coronavirus 2 infection via two mechanisms by inhibiting bradykinin B1,B2 receptors expression and upregulating the depleted ACE2 in COVID-19 . Bradykinin B1 receptors are not expressed under physiological conditions but are induced under inflammatory conditions. Here we hypothesize that permanent attack and invasion of COVID-19 to lung epithelial cells via binding to ACE2 leads to tissue injury and inflammation and that increases BK levels and BK-B2-receptor (B2R) stimulation A study reported that tissue injury and inflammation increases BK levels and BK-B2-receptor (B2R) stimulation. We suggest that Bradykinin mediates and induces lung injury, proinflammatory cytokines and inflammation likely precipitates life threatening respiratory complications in COVID-19. Further experiments showed that BK treatment stimulated IL-6 production On the other hand a study reported that cells treated with Retinoic acid and Tamoxifen for 48 h significantly decreased the BK-B2 receptor protein levels (70.3 ± 0.6% vs. 100% of control, P < 0.05). Retinoids inhibit bradykinin B1 receptor-sensitized responses and this action could participate in their anti-inflammatory and immunomodulatory effects. In addition retinoic acid, is known to possess in vivo anti-inflammatory, anti-platelet and fibrinolytic activities. A study investigated the in vitro thrombin and platelet aggregation inhibitory activities of retinoic acid and retinaldehyde.Retinoic acid, retinaldehyde and retinol exhibited potent inhibition of thrombin, with IC50 values of 67μg/ml, 74μg/ml and 152μg/ml, respectively for the inhibition of thrombin (Sigma); and 49μg/ml, 74μg/ml and 178μg/ml, respectively for the inhibition of thrombin (plasma). Amongst vitamin A and its derivatives, retinoic acid showed the highest inhibition of both the forms of thrombin. Beside the effectiveness of TAM on cancer cells, it also has other effects on numerous microbes including parasite, fungi, bacteria, and some viruses such as Ebola virus and human immunodeficiency virus (HIV).Furthermore Tamoxifen can block the action of interleukin 6 and inhibit neutrophils. A study demonstrated that tamoxifen has side effects associated with neutropenia. Since tamoxifen can cause neutropenia and subsequently influence the neutrophil-to-lymphocyte ratio (NLR) value In addition it has anti malarial effect similar to chloroquine In conclusion Keywords: COVID 2019 , Retinoic acid, Endosomal toll-like receptor 3,T Cells, IFN type1, AT1, ACE2,TMPRSS2
The proposed study is designed to investigate if and how pregnant women infected with Coronavirus Disease-19 (COVID-19) infection go on to develop long-term immunity. In December 2019, a group of people in Wuhan, China presented with symptoms of a pneumonia of an unknown cause that led to the discovery of a new coronavirus called COVID-19. COVID-19 has caused a global pandemic with 7,140,000 confirmed cases and 418,000 deaths as of 13th June 2020. In the United Kingdom (UK), there have been 294,000 cases and 41,662 deaths as of 13th June 2020. In humans, this infection primarily involves the upper part of the lungs, but it can also affect other organs. It causes mild symptoms in the majority of people affected but some people can have severe infections, with some even requiring critical care in hospital. During Severe acute respiratory syndrome (SARS), a previous coronavirus epidemic, pregnant women were disproportionately affected with severe illness. Understanding how the immune system responds long-term to this infection may hold the key to developing better vaccines and efficient treatment plans. Specialised immunity develops when individuals are infected by this and other viruses. The investigators of this study propose that, in pregnancy, this specialised immunity may not behave effectively. This may affect their ability to develop long lasting immunity and make them more vulnerable to re-infection. In this study, the investigators aim to recruit patients across 6 groups including COVID-19 newly infected pregnant women, and people with differing illness severity, mild to moderate, severe/critical, no infection (controls), as well as pregnant women with influenza and those receiving influenza vaccine. The study team will compare COVID-19 in pregnancy with non-pregnant infected and with influenza infected and vaccinated pregnant women. The study team will consent patients in all of these groups to provide a series of blood samples at different time points in a 12-month period.
The COVID-19 pandemic has caused major disruption to healthcare systems with significant socioeconomic impacts. Currently, there are no licensed preventions available against COVID-19 and accelerated vaccine development is urgently needed. A safe and effective vaccine for COVID 19 prevention would have significant global public health impact.
The purpose of this study is to prove the efficacy and safety Surfactant-BL, administered by inhalation in adult hospitalized patients with ARDS due to COVID-19.
Cancer patients are considered vulnerable to COVID-19 infection. During the pandemic, cancer patients may need to continue their regular treatment of chemotherapy and / or radiotherapy and therefore must visit a hospital unit. As such, they may be at risk for SARS-CoV-2 infection by means of close contact to other patients and health care workers. Hospitals may implement policies to identify symptomatic subjects and limit their access to the chemotherapy / radiotherapy unit. However, asymptomatic COVID-19 positive patients may escape these filters and potentially be contagious to other patients and their health-related workers that care for other several patients. Therefore, there is a real risk of an outbreak that affects a particularly fragile patient population. Patients and their doctors need to know what is the risk associated to visiting a chemotherapy unit in order to decide if the risk outweighs the benefits of cancer treatment in their particular case. To date, this risk is unknown. The study will test patients and health care workers for COVID-19 infection during the peak of the pandemic in a chemotherapy unit in Mexico in order to determine this risk.
Upper respiratory swabs, such as the nasopharyngeal (NP) swab, have so far been major specimen sources used for the SARS-COV-2 molecular test. However, due to the discomfort and invasiveness of NP collection, and the expense of personal protective equipment, alternative sampling sources such as saliva are desired. The purpose of this proposed study is: 1) to examine whether saliva can be used as an specimen for the SARS-COV-2 molecular test; 2) to test if gingival crevicular fluids is a reliable specimen for the SARS-COV-2 antibodies.
This is an observational prospective study. The aim is to assess the prevalence of test positivity (swab or serological examination) to Coronavirus Disease-2019 (Covid-19) in relation to the duties and related occupational risk.
The primary objective of Part 1 (Single Ascending Dose) is to assess the safety and tolerability of anti-SARS-CoV-2 IgY when given as single-ascending doses administered intranasally to healthy participants. The primary objective of Part 2 (Multiple Dose) is to assess the safety and tolerability of anti-SARS-CoV-2 IgY when given as multiple doses administered intranasally to healthy participants. A secondary objective is to assess the pharmacokinetics of anti-SARS-CoV-2 IgY when given as multiple doses administered intranasally to healthy participants. Safety will be evaluated using adverse event (AE), physical examination (including vital signs), electrocardiogram, and clinical laboratory data. Pharmacokinetics will be evaluated by serum anti-SARS-CoV-2 IgY concentration.
We seek to study the behaviour of Coronavirus infection in patients with rheumatological and/or autoimmune comorbidities, understood as a particular pathophysiological universe with its own risks and eventual benefits, until now fully hypothetical to be confirmed by means of real and recent evidence. On March 12, 2020, an initiative called the Global Alliance for COVID-19 in Rheumatology (The COVID-19 Rheumatology Alliance) arises, as a rapid response of international coordination whose ultimate goal is to serve as help or guideline for all those doctors who seek be faced with receiving, evaluating, understanding and caring for a patient with rheumatological and / or autoimmune diseases in relation to the imminent risk of COVID-19.
This protocol provides access to investigational convalescent plasma for hospitalized patients with COVID-19. Following provision of informed consent, patients will be administered around 500 mL of convalescent plasma obtained from an individual who has recovered from a documented SARS-CoV-2 infection. The study aims to evaluate the efficacy and safety of anti-SARS-CoV-2 convalescent plasma as adjunctive therapy in preventing disease progression (prevention of ICU admission) among hospitalized patients with COVID-19. Safety outcomes include serious adverse events judged to be related to convalescent plasma. Other information which will be collected includes patient demographics and clinical data which includes quick SOFA scores, ventilator-free days, ICU-free days, dialysis-free days and 28-day mortality.