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Topic Review
Vaccine Hesitancy
Vaccination, despite being recognized as one of the most effective primary public health measures, is viewed as unsafe and unnecessary by an increasing number of individuals. Vaccination is one of the most significant public health achievements, having contributed to the eradication of smallpox and the control of many infectious diseases such as rubella, diphtheria, and polio globally.
  • 1.1K
  • 20 Oct 2022
Topic Review
Cardiac Damage in Chagas Disease
Chagas disease is a complex zoonosis. Its natural history involves the interaction of transmitting arthropods with wild, peridomestic, and domestic mammals, and it has a great diversity of transmission forms. In a vertebrate host, the disease has two clinical phases: an acute phase and a chronic one; the former evolves without demonstrated pathology and can last 10–20 years. After this phase, some patients progress to the chronic symptomatic phase, in which they develop mainly cardiac lesions. The lesions in this cardiomyopathy involve several cardiac tissues, mainly the myocardium, and in severe cases, the endocardium pericardium; this can cause pleural effusion, which may evolve into sudden death, which is more frequent in cases with dilated heart disease and severe heart failure.
  • 1.1K
  • 02 Mar 2023
Topic Review
Types of COVID-19 Vaccines
Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a highly contagious virus that emerged at the end of 2019 and has caused an upper respiratory disease pandemic, currently known as Coronavirus Disease 2019 (COVID-19). Vaccine clinical studies are developing promptly with the aim of obtaining vaccines that are effective in suppressing the spread of the virus; however, the development of viral mutations raises concerns about the decreasing effectiveness of the resulting vaccine, which also results in the need for more in-depth studies. There have been 330 vaccines developed, including 136 clinical developments and 194 pre-clinical developments. 
  • 1.1K
  • 12 Jan 2022
Topic Review
Machine Learning Used to Combat COVID-19
Coronavirus disease (COVID-19) has had a significant impact on global health since the start of the pandemic in 2019. As of June 2022, over 539 million cases have been confirmed worldwide with over 6.3 million deaths as a result. Artificial Intelligence (AI) solutions such as machine learning and deep learning have played a major part in this pandemic for the diagnosis and treatment of COVID-19.
  • 1.1K
  • 20 Sep 2022
Topic Review
Major Pharmacological Actions of Quercetin
Quercetin (3,3′,4′,5,7-pentahydroxy-2-phenylchromen-4-one), the major representative of the flavonoid subclass of flavonols, is derived from the Latin word “Quercetum,” meaning “Oak Forest”. It can be found in a variety of foods, including fruits and vegetables, and has been reported to be effective against a variety of viruses. 
  • 1.1K
  • 02 Feb 2023
Topic Review
Tuberculosis Treatment and Impact of Drug Delivery Systems
With an incidence of ten million cases and between one and two million deaths each year, Mycobacterium tuberculosis is the deadliest infectious agent currently. In this entry, the general physiopathology of tuberculosis is described, as well as the drugs constituting the first- and second-line treatments. The potential of nanosized drug delivery systems for the treatment of tuberculosis is also highlighted.
  • 1.1K
  • 31 Mar 2023
Topic Review
Connections between COVID-19 and Autoimmune Diseases
Autoimmune diseases and SARS-CoV-2 infections are intertwined in several ways. Both conditions lead to immune-mediated tissue damage, the immune response is accompanied by the increased secretion of inflammatory cytokines and both conditions can be treated using immunomodulatory drugs. Patients with certain autoimmune diseases, such as systemic lupus erythematosus, rheumatoid arthritis, type 1 diabetes, cardiac sarcoidosis, idiopathic pulmonary fibrosis, autoimmune hepatitis, multiple sclerosis and others, are more susceptible to SARS-CoV-2 infection, either because of the active autoimmune disease or because of the medications used to treat it. Conversely, SARS-CoV-2 infection can also cause certain autoimmune diseases. 
  • 1.1K
  • 25 Nov 2022
Topic Review
Imported Malaria
Malaria is the most common vector-borne parasitic infection causing significant human morbidity and mortality in nearly 90 tropical/sub-tropical countries worldwide. Significant differences exist in the incidence of malaria cases, dominant Plasmodium species, drug-resistant strains and mortality rates in different countries. Six Gulf Cooperation Council (GCC) countries (Bahrain, Kuwait, Qatar, Oman, Saudi Arabia and United Arab Emirates, UAE) in the Middle East region with similar climates, population demographics and economic prosperity are aiming to achieve malaria elimination. In this narrative review, all studies indexed in PubMed describing epidemiological characteristics of indigenous and imported malaria cases, vector control status and how malaria infections can be controlled to achieve malaria elimination in GCC countries were reviewed and discussed. 
  • 1.1K
  • 05 Aug 2021
Topic Review
mRNA-Based COVID-19 Vaccines Using Lipid Nanoparticles
Lipid nanoparticles (LNPs) have recently emerged as one of the most advanced technologies for the highly efficient in vivo delivery of exogenous mRNA, particularly for COVID-19 vaccine delivery. LNPs comprise four different lipids: ionizable lipids, helper or neutral lipids, cholesterol, and lipids attached to polyethylene glycol (PEG). Since its first isolation in 1961, mRNA (that encodes the protein of interest) research has taken several paths, which made us understand its diversified functions and modification-mediated potential for therapeutic applications. As a result of the COVID-19 pandemic, nucleic acid therapeutics (NATs), particularly mRNA vaccines, potentials have been enabled for emerging infectious diseases. The translation of host genetic information (DNA) into proteins by ribosomes in the cytoplasm is mediated by mRNA.
  • 1.1K
  • 31 Mar 2023
Topic Review
Glutamine Deficiency in COVID-19
The coronavirus disease 2019 (COVID-19) pandemic has caused the death of almost 7 million people worldwide. While vaccinations and new antiviral drugs have greatly reduced the number of COVID-19 cases, there remains a need for additional therapeutic strategies to combat this deadly disease. Accumulating clinical data have discovered a deficiency of circulating glutamine in patients with COVID-19 that associates with disease severity. Glutamine is a semi-essential amino acid that is metabolized to a plethora of metabolites that serve as central modulators of immune and endothelial cell function. A majority of glutamine is metabolized to glutamate and ammonia by the mitochondrial enzyme glutaminase (GLS). Notably, GLS activity is upregulated in COVID-19, favoring the catabolism of glutamine. This disturbance in glutamine metabolism may provoke immune and endothelial dysfunction leading to vascular occlusion, multiorgan failure, and death. Strategies that restore the plasma concentration of glutamine, its metabolites, or downstream effectors represent a promising therapeutic that approach that may correct immune and endothelial cell dysfunction and prevent the development of occlusive vascular disease in patients stricken with COVID-19.
  • 1.1K
  • 28 Apr 2023
Topic Review
Novel HIV Antiretroviral Therapeutic Strategies
When the first cases of HIV infection appeared in the 1980s, AIDS was a deadly disease without any therapeutic alternatives. Currently, there is still no cure for most cases mainly due to the multiple tissues that act as a reservoir for this virus besides the high viral mutagenesis that leads to an antiretroviral drug resistance. Throughout the years, multiple drugs with specific mechanisms of action on distinct targets have been approved.
  • 1.1K
  • 17 Sep 2021
Topic Review
Microbiological Perspectives in COVID-19 Pandemics
The COVID-19 pandemic caused by SARS-CoV-2 remains a significant issue for global health, the economy, and society. When SARS-CoV-2 began to spread, the most recent serious infectious disease of this century around the world, with its high morbidity and mortality rates, it is understandable why such infections have generally been spread in the past, mainly from international travel movements. Microbiology is a branch of medicine and biology that studies the structure and functions of microorganisms (i.e., all those single-celled, multicellular or acellular living organisms not visible to the naked eye such as bacteria, Archaea, some types of fungi, algae, protozoa, viruses and prions).
  • 1.1K
  • 02 Sep 2022
Topic Review
Genitourinary Tuberculosis
Genitourinary tuberculosis (GUTB) represents a disease often underestimated by urological specialists, particularly in settings such as the European one, where the pathology is less frequent. Similar to other uncommon diseases at these latitudes, GUTB is a neglected clinical problem. Its symptoms might be mistaken for other urological diseases, and therefore its diagnosis might be delayed.
  • 1.1K
  • 18 Nov 2021
Topic Review
T Cell Epitopes from the Proteome of HBV
T cell epitopes functionally validated from HBV antigens during the past 33 years; the human leukocyte antigen (HLA) supertypes to present these epitopes, and the methods to screen and identify T cell epitopes. 
  • 1.1K
  • 19 Apr 2022
Topic Review
Antioxidant Effects of Lycopene
Malaria is a disease that affects thousands of people around the world every year. Its pathogenesis is associated with the production of reactive oxygen and nitrogen species (RONS) and lower levels of micronutrients and antioxidants. Patients under drug treatment have high levels of oxidative stress biomarkers in the body tissues, which limits the use of these drugs. Therefore, several studies have suggested that RONS inhibition may represent an adjuvant therapeutic strategy in the treatment of these patients by increasing the antioxidant capacity of the host. In this sense, supplementation with antioxidant compounds such as zinc, selenium, and vitamins A, C, and E has been suggested as part of the treatment. Among dietary antioxidants, lycopene is the most powerful antioxidant among the main carotenoids. 
  • 1.1K
  • 09 Jan 2023
Topic Review
Camel Milk
Camel milk (CM) constitutes an important dietary source in the hot and arid regions of the world. CM is a colloidal mixture of nutritional components (proteins, carbohydrates, lipids, vitamins, and minerals) and non-nutritional components (hormones, growth factors, cytokines, immunoglobulins, and exosomes). 
  • 1.1K
  • 14 Jul 2022
Topic Review
Renin-Angiotensin System and COVID-19
The renin–angiotensin system (RAS), an essential enzymatic cascade involved in maintaining blood pressure and electrolyte balance, is involved in the pathogenicity of COVID-19, since the angiotensin-converting enzyme II (ACE2) acts as the cellular receptor for SARS-CoV-2 in many human tissues and organs. In fact, the viral entrance promotes a downregulation of ACE2 followed by RAS balance dysregulation and an overactivation of the angiotensin II (Ang II)–angiotensin II type I receptor (AT1R) axis, which is characterized by a strong vasoconstriction and the induction of the profibrotic, proapoptotic and proinflammatory signalizations in the lungs and other organs. This mechanism features a massive cytokine storm, hypercoagulation, an acute respiratory distress syndrome (ARDS) and subsequent multiple organ damage.
  • 1.1K
  • 25 Nov 2021
Topic Review
Pathogenetic Analogies of Preeclampsia and COVID-19
Preeclampsia is an obstetric pathology that, surprisingly, resembles the pathology of COVID-19. Both diseases are characterized by significant alterations in the renin-angiotensin system (RAS). RAS-mediated mechanisms may explain their primary clinical-pathological features, which are suggestive of an underlying microvascular dysfunction, with induction of vasculopathy, coagulopathy, and inflammation. 
  • 1.1K
  • 16 May 2022
Topic Review
Monocytes’ and Macrophages’ Proinflammatory Immune Response
Monocytes and macrophages are a central component of the innate immune system and exert an important function in orchestrating inflammation.
  • 1.1K
  • 13 Jul 2022
Topic Review
Adrenomedullin and COVID-19
The COVID-19 pandemic is still in progress, and a significant number of patients have presented with severe illness. Recently introduced vaccines, antiviral medicines, and antibody formulations can suppress COVID-19 symptoms and decrease the number of patients exhibiting severe disease. However, complete avoidance of severe COVID-19 has not been achieved and there are insufficient methods to treat it. Adrenomedullin (AM) is an endogenous peptide that maintains vascular tone and endothelial barrier function. The AM plasma level is markedly increased during severe inflammatory disorders, such as sepsis, pneumonia, and COVID-19, and associated with its prognosis. Exogenous AM administration reduced inflammation and related organ damage in rodent models. The results strongly suggest that AM could be an alternative therapy for COVID-19. Researchers are currently conducting an investigator-initiated phase 2a trial for moderate to severe COVID-19 using AM.
  • 1.1K
  • 07 Mar 2022
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