View clinical trials related to Covid19.
Filter by:This is an interventional new drug clinical trial for a Phase 2 randomized, double-blind, and placebo control study using intravenous injection of allogeneic adipose stem cells (Celltex AdMSCs) for subjects with severe COVID-19.
This is a phase Ⅰ/Ⅱ, single-center, randomized, double-blind, placebo-controlled study, to evaluate the safety, tolerability and immunogenicity of the recombinant COVID-19 vaccine (Sf9 cells) in the subjects from healthy aged 6-17 years with immunization procedures 0, 21, 42 days and doses (10μg/20μg/40μg).
To investigate short-term effect of COVID-19 vaccination on blood pressure by conducting 24-hour ABPM
The study aims to investigate (1) if COVID-19 vaccine impacts on blood pressure, (2) the extent of impact on blood pressure (if any), and (3) which groups of subjects are more susceptible to be affected by COVID-19 vaccine on blood
This study is aimed to investigate the treatment vitamin D3 as complementary therapy with routine care for early mild symptoms of COVID-19 in outpatients setting.
Utilizing the crosstalk among aerosolized phenformin, methylene blue, photodynamic therapy , zinc and potassium for treating severe COVID-19 infection and its inflammatory complication Amr Ahmed(1), Mahmoud Elkazzaz(2), Tamer Haydara(3), and Abdullah Alkattan(4) 1. Director of tuberculosis program Ghubera, public health department ,First health cluster ,Ministry of health ,Saudia Arabia. 2. Department of chemistry and biochemistry, Faculty of Science, Damietta University, Egypt. 3. Department of Internal Medicine, Faculty of Medicine, Kafrelsheikh University, Egypt. 4. Ministry of Health, Riyadh, Saudi Arabia. SARS-CoV-2 represents the largest current health challenge for the society. Moreover, numerous variants of the virus that causes COVID-19 are being tracked in the United States and globally during this pandemic. Here, we will use combination therapy which involve agents with significant activity and different mechanisms of action against covid-19 and its inflammatory complication. Excessive activities of cysteinyl cathepsins (CysCts) contribute to the progress of many diseases. however, therapeutic inhibition has been problematic. Cathepsin L are crucial in terms of the endocytosis by cleaving the spike protein, which permits viral membrane fusion with endosomal membrane, and succeeded by the releasing of viral genome to the host cell. Thereby, inhibition of cathepsin L may be advantageous in terms of decreasing infection caused by SARS-CoV-2. It is well known that zinc (Zn) possesses a variety of direct and indirect antiviral properties, which are realized through different mechanisms. Administration of Zn supplement has a potential to enhance antiviral immunity and to restore depleted immune cell function, in particular in immunocompromised patients. It has been found that Zn 2+ deficiency leads to an exaggerated activity of Cysteine cathepsin increasing the autoimmune/inflammatory response. . Zn2+ is a natural inhibitor of proteases with CysHis dyads or CysHis(Xaa) triads. cysteine protease Cathepsin L (CatL) involvement with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and COVID-19 from different points of view. At this purpose Zn 2+ metal can be safely combined with phenformin a drug that increases the anti-proteolytic effect of endogenous Zn 2+ lowering the excessive activity of some CysCts.; A study found that phenformin-Zn2+ complex is identified as a modifiable pharmacophore for synthesis of therapeutic CysCt inhibitors with a wide range of potencies and specificities. Phenformin stabilizes a "Zn2+ sandwich" between the drug and protease active site. Additionally, phenformin was found to be potent inhibitor of IL-6 R, with phenformin (100 µM) treatment for 48 h, decreased IL-6R expression in ANBL6, RPMI, U266, MM1S, and JJN3 was 5.51 (p = 0.0025), 3.03 (p = 0.0005), 1.55 (p < 0.05), 2.09 (p = 0.0082) and 1.19-fold, respectively. Furthermore, phenformin was discovered to potentially and strongly bind to ACE2 receptors, according to a docking research being conducted by the principle investigators of this clinical study therefore, Phenformin is expected to potentially attach to ACE2 receptors and lead to its downregulation, an inhibitory mechanism which may combat and block COVID-19 infection in lung epithelial cells. Phenformin may induce lactic acidosis therefore according to the principal investigator The phenformin will be utilized as aerosolized by inhalation for COVID-19 treatment and this may be an effective novel treatment strategy that would limit the risk of systemic side-effects associated with biguanides due to the low inhaled dose. In addition, we will use aerosolized phenformin in combination with methylene blue. A study found that a very marked improvement in lactate and pyruvate concentrations occurred within six hours of the beginning of méthylène blue administration in human . It has been known for some time that méthylène blue is a moderately efficient hydrogen acceptor in several enzyme sys¬ tems and significantly reduce oxidative stress by scavenging ROS. Moreover, Methylene Blue has antiviral activity and was found to Inhibit the Spike-ACE2 Protein-Protein Interaction-a Mechanism that can contribute to its Antiviral Activity Against COVID-19 For many reasons, methylene blue is a promising drug for an active treatment against SARS-CoV-2 . Since methylene blue can work as a photosensitizer, photodynamic therapy as an antiviral treatment has great potential in the treatment of COVID-19.. This clinical study will investigate the effectiveness of SARS-CoV-2 infected people treatment using methylene blue and the following photodynamic therapy after that our clinically approved patients will receive phenformin and zinc . But methylene blue may lead to lowering in potassium concentration.Therefore, we will add potassium supplement to this combination.
This study is a randomized, double-blinded, and placebo controlled phase Ⅰ clinical trial of the SARS-CoV-2 inactivated vaccine to evaluate the safety and immunogenicity of the experimental vaccine in healthy population aged 3 to 17 years.
This study is a randomized, double-blinded, and placebo controlled phase Ⅱ clinical trial of the SARS-CoV-2 inactivated vaccine to evaluate the safety and immunogenicity of the experimental vaccine in healthy population aged 3 to 17 years.
Investigating the potential role of Aerosolized retinoic acid, a potent Vitamin A metabolite for treating COVID-19 Anosmia and retinoic acid insufficiency .A novel approach for regaining Sense of Smell. Mahmoud ELkazzaz(1),Tamer Haydara(2), Abedelaziz Elsayed(3) ,Yousry Abo-amer(4), Hesham Attia(5), Quan Liu(6) and Amr Ahmed(7) 1. Department of chemistry and biochemistry, Faculty of Science, Damietta University, Egypt. 2. Department of Internal Medicine, Faculty of Medicine, Kafrelsheikh University, Egypt 3. Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tanta University, Egypt. 4. Hepatology,Gastroenterology and Infectious Diseases Department, Mahala Hepatology Teaching Hospital, Egypt 5. Department of Immunology and Parasitology, Faculty of Science, Cairo University, Egypt. 6. School of Life Sciences and Engineering, Foshan University, Laboratory of Emerging Infectious Disease, Institute of Translational Medicine, The First Hospital of Jilin University, Changchun, China. 7. Director of tuberculosis program Ghubera, public health department ,First health cluster ,Ministry of health ,Saudia Arabia. - Very important Note: This clinical study is the first clinical study in literature (First posted August 12, 2021) which demonstrated depending on molecular findings that Vitamin A /Retinoic Acid will treat smell loss resulted by COVID-19 Recent rapidly accumulating evidences and reports indicate that partial loss of the sense of smell or even total anosmia are early markers of SARS-CoV-2 infection and frequently reported symptoms associated with the COVID-19 pandemic (Lechien J. R et al., 2020) However, the cellular mechanisms of this phenomenon are unknown. The rates of insomnia and depression were 26.45% and 9.92% in the COVID-19 patients after recovery. Therefore, finding an effective treatment for COVID-19 Anosmia is a critical point. Although, ACE2 has been identified as the principal host cell receptor of 2019-nCoV, and it is thought to play a critical role in the virus's entrance into the cell and subsequent infection, many cells can be infected by COVID-19 while also expressing little or no ACE2. Even though the COVID-19 entry receptor, angiotensin-converting enzyme 2 (ACE2), is not expressed in the receptor of olfactory neurons, or its synthesis is limited to to a minor fraction of these neurons.of these neurons, COVID-19 infection causes a loss of smell (anosmia) (Katarzyna Bilinska et al.,2021). Our recent findings showed that COVID-19 binds directly to STRA6 receptors of retinol leading to retinol depletion and retinoic acid insufficiency (M Elkazzaz et al,. 2021) . Retinoic acid insufficiency in the olfactory epithelium, both in mouse and chick models, causes progenitor cell maintenance failure and, consequently, olfactory neurons differentiation is not maintained . An explant system, showed that renewal of olfactory neurons is inhibited if retinoic acid synthesis was failed in the olfactory epithelium (Paschaki M et al., 2013) . It's worth noting that vitamin A shortage also causes olfactory and taste problems, In a study by Garrett-Laster et al., (1984), the patients had vitamin A deficiency because of malnutrition and alcoholic liver cirrhosis; they lost their sense of smell after that disorder. LaMantia and Rawson et al.,( 2007) reported that administration of retinoid acid after the damage of olfactory system motivates an immune response and produces a more quick recovery of olfactoryguided behavior. It was showed that Isotretinoin improved the significantly performance of patients in the olfactory test(Demet Kartal et al.,2017) Moreover, there is increasing evidence that retinoic acid (atRA) influences gene expression of components of renin-angiotensin system (RAS), which plays a pivotal role in the pathophysiology of essential hypertension. Retinoic acid induced ACE2 expression in different animal models. Moreover, a study suggests that topical retinoids may have applicability in promoting sinus regeneration and wound healing. In a study comparing treated and untreated nasal mucosa ,untreated regenerated mucosa showed expected changes of submucosal gland loss, basal lamina and lamina propria fibrosis and loss of cilia. Reinoic acid treatment appeared to result in better mucosal regeneration marked by less cellular atypia and fibrosis(Mendy S. Maccabee et al,. 2003).. Aerosolized retinoic acid will have an effective role in treating post COVID-19 anosmia (loss of smell) via upregulating ACE2, STRA 6 and regenerating of olfactory receptors and olfactory sensory cells and neurons.
This study is a longitudinal cohort study which investigates the effect of COVID-19 in ambulatory care. This study aims to assess the effect of COVID-19 beyond the acute phase, i.e. on long-term symptoms, respiratory and cardiovascular health, use of health services, and quality of life.