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COVID-19 Innovative Drug Treatments: Looking Outside of Plato’s Cave

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pharmacology".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 86527

Special Issue Editors


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Guest Editor
Postgraduate Research Institute of Science, Technology, Environment and Medicine, CY-3021 Limassol, Cyprus
Interests: chelation therapy; chelation in medicine; chelating drugs; iron chelating drugs in thalassaemia and other diseases of iron overload or imbalance; chelator antioxidants in free radical pathology; chelators and antioxidants in cancer and neurodegenerative diseases; chelating drug design, development and clinical use
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Postgraduate Research Institute of Science, Technology, Environment and Medicine, CY-3021 Limassol, Cyprus
Interests: medicine; surgery; trauma; orthopaedics; global health; medicinal drugs; orphan drugs; risk/benefit assessment; sports medicine
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Postgraduate Research Institute of Science, Technology, Environment and Medicine, CY-3021 Limassol, Cyprus
Interests: medicine; internal medicine; medicinal drugs; thalassaemia; Friedreich's Ataxia; infectious diseases
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A high rate of morbidity and mortality has been observed worldwide as a result of the COVID-19 (coronavirus) pandemic. Currently, there is no available effective treatment. Many clinical trials with antiviral and other drugs are in progress, but the availability of an effective vaccine or the development of experimental drugs is not considered feasible for this year. The economic decline from the emergency restrictions is likely to cause unprecedented damage to living standards, including decline in healthcare systems and increases in morbidity and mortality worldwide, especially in developing countries. Emergency strategies and medicines are required to combat the COVID-19 pandemic, including unconventional approaches. There are many pathways involved in the initiation and progression of the COVID-19 infection, and many more associated with the severe acute respiratory syndrome (SARS) and other symptomatological side effects. The aim of this Special Issue is to propose possible therapeutics and the related mechanisms for targeting one or more pathways to combat the progress of the COVID-19 disease and/or associated symptoms. The proposal for therapeutics is only related to regulatory approved drugs and should include the INN name, mode of action, posology, therapeutic index, toxic side effects, ADMET characteristics, patient categories receiving the drug, drug interactions and use in adjuvant therapies. It is hoped that the findings and strategy adopted in this Special Issue will encourage clinical trials and the compassionate use of promising therapeutics against the COVID-19 infection.

Prof. Dr. George J. Kontoghiorghes
Dr. Christina N. Kontoghiorghe
Dr. Annita Kolnagou
Guest Editors

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Keywords

  • drug design, development and use
  • COVID-19 drugs
  • SARS-CoV-2
  • multi-target drugs
  • antiviral drugs
  • drugs for COVID-19 symptomatology
  • repurposing drugs
  • prophylactic drugs
  • emergency medicines
  • combination therapies
  • adjuvant therapies
  • drug risk/benefit assessment
  • compassionate use of drugs
  • ADMET of drugs

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Published Papers (12 papers)

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Editorial

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4 pages, 190 KiB  
Editorial
Conventional and Unconventional Approaches for Innovative Drug Treatments in COVID-19: Looking Outside of Plato’s Cave
by George J. Kontoghiorghes, Annita Kolnagou, Stella Fetta and Christina N. Kontoghiorghe
Int. J. Mol. Sci. 2021, 22(13), 7208; https://doi.org/10.3390/ijms22137208 - 5 Jul 2021
Cited by 6 | Viewed by 2154
Abstract
Thousands of drugs and nutraceuticals along with their combinations can be used to select candidate therapeutics for targeting the transmission, proliferation and the fatal or severe symptoms of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in order to reduce the unacceptably high [...] Read more.
Thousands of drugs and nutraceuticals along with their combinations can be used to select candidate therapeutics for targeting the transmission, proliferation and the fatal or severe symptoms of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in order to reduce the unacceptably high mortality rate observed in the coronavirus disease 2019 (COVID-19) pandemic and its associated negative effects on daily life worldwide [...] Full article

Research

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17 pages, 2524 KiB  
Article
Protective Effects of Meldonium in Experimental Models of Cardiovascular Complications with a Potential Application in COVID-19
by Reinis Vilskersts, Dana Kigitovica, Stanislava Korzh, Melita Videja, Karlis Vilks, Helena Cirule, Andris Skride, Marina Makrecka-Kuka, Edgars Liepinsh and Maija Dambrova
Int. J. Mol. Sci. 2022, 23(1), 45; https://doi.org/10.3390/ijms23010045 - 21 Dec 2021
Cited by 7 | Viewed by 5266
Abstract
Right ventricular (RV) and left ventricular (LV) dysfunction is common in a significant number of hospitalized coronavirus disease 2019 (COVID-19) patients. This study was conducted to assess whether the improved mitochondrial bioenergetics by cardiometabolic drug meldonium can attenuate the development of ventricular dysfunction [...] Read more.
Right ventricular (RV) and left ventricular (LV) dysfunction is common in a significant number of hospitalized coronavirus disease 2019 (COVID-19) patients. This study was conducted to assess whether the improved mitochondrial bioenergetics by cardiometabolic drug meldonium can attenuate the development of ventricular dysfunction in experimental RV and LV dysfunction models, which resemble ventricular dysfunction in COVID-19 patients. Effects of meldonium were assessed in rats with pulmonary hypertension-induced RV failure and in mice with inflammation-induced LV dysfunction. Rats with RV failure showed decreased RV fractional area change (RVFAC) and hypertrophy. Treatment with meldonium attenuated the development of RV hypertrophy and increased RVFAC by 50%. Mice with inflammation-induced LV dysfunction had decreased LV ejection fraction (LVEF) by 30%. Treatment with meldonium prevented the decrease in LVEF. A decrease in the mitochondrial fatty acid oxidation with a concomitant increase in pyruvate metabolism was noted in the cardiac fibers of the rats and mice with RV and LV failure, respectively. Meldonium treatment in both models restored mitochondrial bioenergetics. The results show that meldonium treatment prevents the development of RV and LV systolic dysfunction by enhancing mitochondrial function in experimental models of ventricular dysfunction that resembles cardiovascular complications in COVID-19 patients. Full article
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18 pages, 1754 KiB  
Article
Platelet Lysate Nebulization Protocol for the Treatment of COVID-19 and Its Sequels: Proof of Concept and Scientific Rationale
by Maider Beitia, Diego Delgado, Pello Sánchez, Ana Vallejo de la Cueva, José Ramón Cugat and Mikel Sánchez
Int. J. Mol. Sci. 2021, 22(4), 1856; https://doi.org/10.3390/ijms22041856 - 12 Feb 2021
Cited by 9 | Viewed by 3753
Abstract
One of the most severe effects of coronavirus disease 2019 (COVID-19) is lung disorders such as acute respiratory distress syndrome. In the absence of effective treatments, it is necessary to search for new therapies and therapeutic targets. Platelets play a fundamental role in [...] Read more.
One of the most severe effects of coronavirus disease 2019 (COVID-19) is lung disorders such as acute respiratory distress syndrome. In the absence of effective treatments, it is necessary to search for new therapies and therapeutic targets. Platelets play a fundamental role in respiratory disorders resulting from viral infections, being the first line of defense against viruses and essential in maintaining lung function. The direct application of platelet lysate (PL) obtained from the platelet-rich plasma of healthy donors could help in the improvement of the patient due its anti-inflammatory, immunomodulatory, antifibrotic, and repairing effects. This work evaluates PL nebulization by analyzing its levels of growth factors and its biological activity on lung fibroblast cell cultures, besides describing a scientific basis for its use in this kind of pathology. The data of the work suggest that the molecular levels and biological activity of the PL are maintained after nebulization. Airway administration would allow acting directly on the lung tissue modulating inflammation and stimulating reparative processes on key structures such as the alveolocapillary barrier, improving the disease and sequels. The protocol developed in this work is a first step for the study of nebulized PL both in animal experimentation and in clinical trials. Full article
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15 pages, 5103 KiB  
Article
Nicotinic Cholinergic System and COVID-19: In Silico Identification of an Interaction between SARS-CoV-2 and Nicotinic Receptors with Potential Therapeutic Targeting Implications
by Konstantinos Farsalinos, Elias Eliopoulos, Demetres D. Leonidas, Georgios E. Papadopoulos, Socrates Tzartos and Konstantinos Poulas
Int. J. Mol. Sci. 2020, 21(16), 5807; https://doi.org/10.3390/ijms21165807 - 13 Aug 2020
Cited by 62 | Viewed by 20737
Abstract
While SARS-CoV-2 uses angiotensin converting enzyme 2 (ACE2) as the receptor for cell entry, it is important to examine other potential interactions between the virus and other cell receptors. Based on the clinical observation of low prevalence of smoking among hospitalized COVID-19 patients, [...] Read more.
While SARS-CoV-2 uses angiotensin converting enzyme 2 (ACE2) as the receptor for cell entry, it is important to examine other potential interactions between the virus and other cell receptors. Based on the clinical observation of low prevalence of smoking among hospitalized COVID-19 patients, we examined and identified a “toxin-like” amino acid (aa) sequence in the Receptor Binding Domain of the Spike Glycoprotein of SARS-CoV-2 (aa 375–390), which is homologous to a sequence of the Neurotoxin homolog NL1, one of the many snake venom toxins that are known to interact with nicotinic acetylcholine receptors (nAChRs). We present the 3D structural location of this “toxin-like” sequence on the Spike Glycoprotein and the superposition of the modelled structure of the Neurotoxin homolog NL1 and the SARS-CoV-2 Spike Glycoprotein. We also performed computational molecular modelling and docking experiments using 3D structures of the SARS-CoV-2 Spike Glycoprotein and the extracellular domain of the nAChR α9 subunit. We identified a main interaction between the aa 381–386 of the SARS-CoV-2 Spike Glycoprotein and the aa 189–192 of the extracellular domain of the nAChR α9 subunit, a region which forms the core of the “toxin-binding site” of the nAChRs. The mode of interaction is very similar to the interaction between the α9 nAChR and α-bungarotoxin. A similar interaction was observed between the pentameric α7 AChR chimera and SARS-CoV-2 Spike Glycoprotein. The findings raise the possibility that SARS-CoV-2 may interact with nAChRs, supporting the hypothesis of dysregulation of the nicotinic cholinergic system being implicated in the pathophysiology of COVID-19. Nicotine and other nicotinic cholinergic agonists may protect nAChRs and thus have therapeutic value in COVID-19 patients. Full article
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Review

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22 pages, 748 KiB  
Review
Deferiprone: A Forty-Year-Old Multi-Targeting Drug with Possible Activity against COVID-19 and Diseases of Similar Symptomatology
by George J. Kontoghiorghes
Int. J. Mol. Sci. 2022, 23(12), 6735; https://doi.org/10.3390/ijms23126735 - 16 Jun 2022
Cited by 10 | Viewed by 3054
Abstract
The need for preparing new strategies for the design of emergency drug therapies against COVID-19 and similar diseases in the future is rather urgent, considering the high rate of morbidity and especially mortality associated with COVID-19, which so far has exceeded 18 million [...] Read more.
The need for preparing new strategies for the design of emergency drug therapies against COVID-19 and similar diseases in the future is rather urgent, considering the high rate of morbidity and especially mortality associated with COVID-19, which so far has exceeded 18 million lives. Such strategies could be conceived by targeting the causes and also the serious toxic side effects of the diseases, as well as associated biochemical and physiological pathways. Deferiprone (L1) is an EMA- and FDA-approved drug used worldwide for the treatment of iron overload and also other conditions where there are no effective treatments. The multi-potent effects and high safety record of L1 in iron loaded and non-iron loaded categories of patients suggests that L1 could be developed as a “magic bullet” drug against COVID-19 and diseases of similar symptomatology. The mode of action of L1 includes antiviral, antimicrobial, antioxidant, anti-hypoxic and anti-ferroptotic effects, iron buffering interactions with transferrin, iron mobilizing effects from ferritin, macrophages and other cells involved in the immune response and hyperinflammation, as well as many other therapeutic interventions. Similarly, several pharmacological and other characteristics of L1, including extensive tissue distribution and low cost of production, increase the prospect of worldwide availability, as well as many other therapeutic approach strategies involving drug combinations, adjuvant therapies and disease prevention. Full article
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25 pages, 2057 KiB  
Review
Immunomodulatory and Anti-Inflammatory Properties of Selenium-Containing Agents: Their Role in the Regulation of Defense Mechanisms against COVID-19
by Valentina N. Mal’tseva, Michael V. Goltyaev, Egor A. Turovsky and Elena G. Varlamova
Int. J. Mol. Sci. 2022, 23(4), 2360; https://doi.org/10.3390/ijms23042360 - 21 Feb 2022
Cited by 43 | Viewed by 5065
Abstract
The review presents the latest data on the role of selenium-containing agents in the regulation of diseases of the immune system. We mainly considered the contributions of selenium-containing compounds such as sodium selenite, methylseleninic acid, selenomethionine, and methylselenocysteine, as well as selenoproteins and [...] Read more.
The review presents the latest data on the role of selenium-containing agents in the regulation of diseases of the immune system. We mainly considered the contributions of selenium-containing compounds such as sodium selenite, methylseleninic acid, selenomethionine, and methylselenocysteine, as well as selenoproteins and selenium nanoparticles in the regulation of defense mechanisms against various viral infections, including coronavirus infection (COVID-19). A complete description of the available data for each of the above selenium compounds and the mechanisms underlying the regulation of immune processes with the active participation of these selenium agents, as well as their therapeutic and pharmacological potential, is presented. The main purpose of this review is to systematize the available information, supplemented by data obtained in our laboratory, on the important role of selenium compounds in all of these processes. In addition, the presented information makes it possible to understand the key differences in the mechanisms of action of these compounds, depending on their chemical and physical properties, which is important for obtaining a holistic picture and prospects for creating drugs based on them. Full article
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16 pages, 527 KiB  
Review
A Patent Review on the Therapeutic Application of Monoclonal Antibodies in COVID-19
by Syed Mohammed Basheeruddin Asdaq, Syed Imam Rabbani, Meshary Alkahtani, Meshal Meshary Aldohyan, Abdullah Mohammad Alabdulsalam, Majed Sadun Alshammari, Saleh Ahmad Alajlan, Aljawharah Binrokan, Yahya Mohzari, Ahmed Alrashed, Mohammed Kanan Alshammari, Mohd. Imran and Naira Nayeem
Int. J. Mol. Sci. 2021, 22(21), 11953; https://doi.org/10.3390/ijms222111953 - 4 Nov 2021
Cited by 10 | Viewed by 4865
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) contains spike proteins that assist the virus in entering host cells. In the absence of a specific intervention, efforts are afoot throughout the world to find an effective treatment for SARS-CoV-2. Through innovative techniques, monoclonal antibodies [...] Read more.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) contains spike proteins that assist the virus in entering host cells. In the absence of a specific intervention, efforts are afoot throughout the world to find an effective treatment for SARS-CoV-2. Through innovative techniques, monoclonal antibodies (MAbs) are being designed and developed to block a particular pathway of SARS-CoV-2 infection. More than 100 patent applications describing the development of MAbs and their application against SARS-CoV-2 have been registered. Most of them target the receptor binding protein so that the interaction between virus and host cell can be prevented. A few monoclonal antibodies are also being patented for the diagnosis of SARS-CoV-2. Some of them, like Regeneron® have already received emergency use authorization. These protein molecules are currently preferred for high-risk patients such as those over 65 years old with compromised immunity and those with metabolic disorders such as obesity. Being highly specific in action, monoclonal antibodies offer one of the most appropriate interventions for both the prevention and treatment of SARS-CoV-2. Technological advancement has helped in producing highly efficacious MAbs. However, these agents are known to induce immunogenic and non-immunogenic reactions. More research and testing are required to establish the suitability of administering MAbs to all patients at risk of developing a severe illness. This patent study is focused on MAbs as a therapeutic option for treating COVID-19, as well as their invention, patenting information, and key characteristics. Full article
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24 pages, 5025 KiB  
Review
Mechanics Insights of Alpha-Lipoic Acid against Cardiovascular Diseases during COVID-19 Infection
by Luc Rochette and Steliana Ghibu
Int. J. Mol. Sci. 2021, 22(15), 7979; https://doi.org/10.3390/ijms22157979 - 26 Jul 2021
Cited by 26 | Viewed by 7958
Abstract
Coronavirus disease 2019 (COVID-19) was first reported in Wuhan, China, in late December 2019. Since then, COVID-19 has spread rapidly worldwide and was declared a global pandemic on 20 March 2020. Cardiovascular complications are rapidly emerging as a major peril in COVID-19 in [...] Read more.
Coronavirus disease 2019 (COVID-19) was first reported in Wuhan, China, in late December 2019. Since then, COVID-19 has spread rapidly worldwide and was declared a global pandemic on 20 March 2020. Cardiovascular complications are rapidly emerging as a major peril in COVID-19 in addition to respiratory disease. The mechanisms underlying the excessive effect of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection on patients with cardiovascular comorbidities remain only partly understood. SARS-CoV-2 infection is caused by binding of the viral surface spike (S) protein to the human angiotensin-converting enzyme 2 (ACE2), followed by the activation of the S protein by transmembrane protease serine 2 (TMPRSS2). ACE2 is expressed in the lung (mainly in type II alveolar cells), heart, blood vessels, small intestine, etc., and appears to be the predominant portal to the cellular entry of the virus. Based on current information, most people infected with SARS-CoV-2 virus have a good prognosis, while a few patients reach critical condition, especially the elderly and those with chronic underlying diseases. The “cytokine storm” observed in patients with severe COVID-19 contributes to the destruction of the endothelium, leading to “acute respiratory distress syndrome” (ARDS), multiorgan failure, and death. At the origin of the general proinflammatory state may be the SARS-CoV-2-mediated redox status in endothelial cells via the upregulation of ACE/Ang II/AT1 receptors pathway or the increased mitochondrial reactive oxygen species (mtROS) production. Furthermore, this vicious circle between oxidative stress (OS) and inflammation induces endothelial dysfunction, endothelial senescence, high risk of thrombosis and coagulopathy. The microvascular dysfunction and the formation of microthrombi in a way differentiate the SARS-CoV-2 infection from the other respiratory diseases and bring it closer to cardiovascular diseases like myocardial infarction and stroke. Due the role played by OS in the evolution of viral infection and in the development of COVID-19 complications, the use of antioxidants as adjuvant therapy seems appropriate in this new pathology. Alpha-lipoic acid (ALA) could be a promising candidate that, through its wide tissue distribution and versatile antioxidant properties, interferes with several signaling pathways. Thus, ALA improves endothelial function by restoring the endothelial nitric oxide synthase activity and presents an anti-inflammatory effect dependent or independent of its antioxidant properties. By improving mitochondrial function, it can sustain the tissues’ homeostasis in critical situation and by enhancing the reduced glutathione it could indirectly strengthen the immune system. This complex analysis could open a new therapeutic perspective for ALA in COVID-19 infection. Full article
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26 pages, 2824 KiB  
Review
Existing Drugs Considered as Promising in COVID-19 Therapy
by Edyta Janik, Marcin Niemcewicz, Marcin Podogrocki, Joanna Saluk-Bijak and Michal Bijak
Int. J. Mol. Sci. 2021, 22(11), 5434; https://doi.org/10.3390/ijms22115434 - 21 May 2021
Cited by 24 | Viewed by 7085
Abstract
COVID-19 is a respiratory disease caused by newly discovered severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The disease at first was identified in the city of Wuhan, China in December 2019. Being a human infectious disease, it causes high fever, cough, breathing problems. [...] Read more.
COVID-19 is a respiratory disease caused by newly discovered severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The disease at first was identified in the city of Wuhan, China in December 2019. Being a human infectious disease, it causes high fever, cough, breathing problems. In some cases it can be fatal, especially in people with comorbidities like heart or kidney problems and diabetes. The current COVID-19 treatment is based on symptomatic therapy, so finding an appropriate drug against COVID-19 remains an immediate and crucial target for the global scientific community. Two main processes are thought to be responsible for the COVID-19 pathogenesis. In the early stages of infection, disease is determined mainly by virus replication. In the later stages of infection, by an excessive immune/inflammatory response, leading to tissue damage. Therefore, the main treatment options are antiviral and immunomodulatory/anti-inflammatory agents. Many clinical trials have been conducted concerning the use of various drugs in COVID-19 therapy, and many are still ongoing. The majority of trials examine drug reposition (repurposing), which seems to be a good and effective option. Many drugs have been repurposed in COVID-19 therapy including remdesivir, favipiravir, tocilizumab and baricitinib. The aim of this review is to highlight (based on existing and accessible clinical evidence on ongoing trials) the current and available promising drugs for COVID-19 and outline their characteristics. Full article
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36 pages, 5961 KiB  
Review
Pharmacological Modulators of Autophagy as a Potential Strategy for the Treatment of COVID-19
by Gustavo José da Silva Pereira, Anderson Henrique França Figueredo Leão, Adolfo Garcia Erustes, Ingrid Beatriz de Melo Morais, Talita Aparecida de Moraes Vrechi, Lucas dos Santos Zamarioli, Cássia Arruda Souza Pereira, Laís de Oliveira Marchioro, Letícia Paulino Sperandio, Ísis Valeska Freire Lins, Mauro Piacentini, Gian Maria Fimia, Patrícia Reckziegel, Soraya Soubhi Smaili and Claudia Bincoletto
Int. J. Mol. Sci. 2021, 22(8), 4067; https://doi.org/10.3390/ijms22084067 - 15 Apr 2021
Cited by 35 | Viewed by 5890
Abstract
The family of coronaviruses (CoVs) uses the autophagy machinery of host cells to promote their growth and replication; thus, this process stands out as a potential target to combat COVID-19. Considering the different roles of autophagy during viral infection, including SARS-CoV-2 infection, in [...] Read more.
The family of coronaviruses (CoVs) uses the autophagy machinery of host cells to promote their growth and replication; thus, this process stands out as a potential target to combat COVID-19. Considering the different roles of autophagy during viral infection, including SARS-CoV-2 infection, in this review, we discuss several clinically used drugs that have effects at different stages of autophagy. Among them, we mention (1) lysosomotropic agents, which can prevent CoVs infection by alkalinizing the acid pH in the endolysosomal system, such as chloroquine and hydroxychloroquine, azithromycin, artemisinins, two-pore channel modulators and imatinib; (2) protease inhibitors that can inhibit the proteolytic cleavage of the spike CoVs protein, which is necessary for viral entry into host cells, such as camostat mesylate, lopinavir, umifenovir and teicoplanin and (3) modulators of PI3K/AKT/mTOR signaling pathways, such as rapamycin, heparin, glucocorticoids, angiotensin-converting enzyme inhibitors (IECAs) and cannabidiol. Thus, this review aims to highlight and discuss autophagy-related drugs for COVID-19, from in vitro to in vivo studies. We identified specific compounds that may modulate autophagy and exhibit antiviral properties. We hope that research initiatives and efforts will identify novel or “off-label” drugs that can be used to effectively treat patients infected with SARS-CoV-2, reducing the risk of mortality. Full article
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16 pages, 1749 KiB  
Review
Therapeutic Role of Tocilizumab in SARS-CoV-2-Induced Cytokine Storm: Rationale and Current Evidence
by Corrado Pelaia, Cecilia Calabrese, Eugenio Garofalo, Andrea Bruni, Alessandro Vatrella and Girolamo Pelaia
Int. J. Mol. Sci. 2021, 22(6), 3059; https://doi.org/10.3390/ijms22063059 - 17 Mar 2021
Cited by 40 | Viewed by 9444
Abstract
Among patients suffering from coronavirus disease 2019 (COVID-19) syndrome, one of the worst possible scenarios is represented by the critical lung damage caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)-induced cytokine storm, responsible for a potentially very dangerous hyperinflammatory condition. Within such [...] Read more.
Among patients suffering from coronavirus disease 2019 (COVID-19) syndrome, one of the worst possible scenarios is represented by the critical lung damage caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)-induced cytokine storm, responsible for a potentially very dangerous hyperinflammatory condition. Within such a context, interleukin-6 (IL-6) plays a key pathogenic role, thus being a suitable therapeutic target. Indeed, the IL-6-receptor antagonist tocilizumab, already approved for treatment of refractory rheumatoid arthritis, is often used to treat patients with severe COVID-19 symptoms and lung involvement. Therefore, the aim of this review article is to focus on the rationale of tocilizumab utilization in the SARS-CoV-2-triggered cytokine storm, as well as to discuss current evidence and future perspectives, especially with regard to ongoing trials referring to the evaluation of tocilizumab’s therapeutic effects in patients with life-threatening SARS-CoV-2 infection. Full article
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27 pages, 3846 KiB  
Review
Cardiovascular Complications Associated with COVID-19 and Potential Therapeutic Strategies
by Arun Samidurai and Anindita Das
Int. J. Mol. Sci. 2020, 21(18), 6790; https://doi.org/10.3390/ijms21186790 - 16 Sep 2020
Cited by 55 | Viewed by 9220
Abstract
The outbreak of coronavirus disease 2019 (COVID-19), an infectious disease with severe acute respiratory syndrome, has now become a worldwide pandemic. Despite the respiratory complication, COVID-19 is also associated with significant multiple organ dysfunction, including severe cardiac impairment. Emerging evidence reveals a direct [...] Read more.
The outbreak of coronavirus disease 2019 (COVID-19), an infectious disease with severe acute respiratory syndrome, has now become a worldwide pandemic. Despite the respiratory complication, COVID-19 is also associated with significant multiple organ dysfunction, including severe cardiac impairment. Emerging evidence reveals a direct interplay between COVID-19 and dire cardiovascular complications, including myocardial injury, heart failure, heart attack, myocarditis, arrhythmias as well as blood clots, which are accompanied with elevated risk and adverse outcome among infected patients, even sudden death. The proposed pathophysiological mechanisms of myocardial impairment include invasion of SARS-CoV-2 virus via angiotensin-converting enzyme 2 to cardiovascular cells/tissue, which leads to endothelial inflammation and dysfunction, de-stabilization of vulnerable atherosclerotic plaques, stent thrombosis, cardiac stress due to diminish oxygen supply and cardiac muscle damage, and myocardial infarction. Several promising therapeutics are under investigation to the overall prognosis of COVID-19 patients with high risk of cardiovascular impairment, nevertheless to date, none have shown proven clinical efficacy. In this comprehensive review, we aimed to highlight the current integrated therapeutic approaches for COVID-19 and we summarized the potential therapeutic options, currently under clinical trials, with their mechanisms of action and associated adverse cardiac events in highly infectious COVID-19 patients. Full article
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