Commentary: Use of Cannabinoids to Treat Acute Respiratory Distress Syndrome and Cytokine Storm Associated With Coronavirus Disease-2019 Cannabidiol Treatment for Severe and Critical Coronavirus (COVID-19) Pulmonary Infection Current management of COVID-19 (coronavirus) is mainly supportive, and respiratory failure from acute
Commentary: Use of Cannabinoids to Treat Acute Respiratory Distress Syndrome and Cytokine Storm Associated With Coronavirus Disease-2019
We read with great interest the recent opinion by Nagarkatti et al. (2020), highlighting a potential role of cannabinoids in the treatment of acute respiratory distress syndrome (ARDS) associated with COVID-19. In particular, based on their previous studies evaluating the effect of THC in ARDS animal models, they focused the attention on the cannabinoid receptors targeting to control the hyperimmune response in severe COVID-19. Although cannabinoids and CBD in particular show an interesting potential, important issues concerning this therapeutics must be considered.
In recent months, the pressing need for effective treatments to counteract the spread of the COVID-19 pandemic dictated the development of new therapeutic approaches to handle or possibly prevent the complications of SARS-CoV-2 infections as a worldwide priority. Clinical profiles of COVID-19 patients range from asymptomatic infection to severe pneumonia with multisystem failure, the leading cause of mortality. In patients with severe disease, the occurrence of cytokine storm and a state of hyperinflammation led to acute respiratory distress syndrome (ARDS) (Lotfi and Rezaei, 2020). As Nagarkatti and colleagues (2020) highlighted, the potential use of cannabinoids in COVID-19 has been suggested for their immunomodulatory and anti-inflammatory properties, but not for the direct antiviral activity. Several authors focused the attention on the nonpsychoactive CBD as adjuvant in SARS-CoV-2 therapy. Recently, for the first time, it has been reported that CBD is able to reduce pro-inflammatory cytokine levels ameliorating symptoms of ARDS induced in a murine model (Khodadadi et al., 2020). Moreover, CBD seems to down-regulate the expression of ACE2 and TMPRSS2, two receptors exploited by SARS-CoV-2 to enter the cells (Wang et al., 2020). However, further studies to support CBD-mediated regulation of ACE2 and TMPRSS2 are needed.
Despite the encouraging potential of CBD, in our opinion, the first issue to consider is that, to date, there are no clinical data about the optimal anti-inflammatory dose and regimen of CBD in patients. Our knowledge about CBD use in patients comes mainly from few clinical studies evaluating the safety and efficacy of CBD as oral solution in the treatment of serious seizure disorders. The results from these studies highlighted that in comparison with other drugs employed for the treatment of seizure disorders, CBD has an overall safe profile, generally showing mild/moderate adverse effects (AEs). However, although with a low incidence, serious CBD AEs were registered (Brown and Winterstein, 2019; Huestis et al., 2019; Chesney et al., 2020; Dos Santos et al., 2020), some of which deserve particular caution in COVID-19 patients. The CBD-mediated impairment of immune response increases the risk of pneumonia or viral infection. Thus, particular attention must be paid for patients receiving immunosuppressive therapy, as some SARS-CoV-2 patients (Brown and Winterstein, 2019). Most importantly, it was observed that increased transaminases levels (ALT and AST) and hepatic injuries occur in CBD-treated patients who are chronically exposed to antiepileptic drugs, probably due to the multiple drug–drug interactions of CBD (Brown and Winterstein, 2019; Dos Santos et al., 2020).
CBD influences the principal enzymes (e.g., CYP450-3A4, -2C19, and UGTs) responsible for biotransformation of a wide range of drugs, thus potentially having impact on their pharmacokinetics and pharmacodynamics (Brown and Winterstein, 2019). The hypothetic drug–drug interactions of THC and CBD with the drugs currently used in therapeutic protocols for COVID-19, mainly antiviral and immunosuppressive drugs, have been analyzed (Land et al., 2020). However, the clinical profiles of frail patients infected by COVID-19 must be considered. Nowadays, the majority of patients included in CBD clinical trials are children or young adults. ARDS arises in severe COVID-19, and it is now clear that advanced age and several comorbidities including diabetes, hypertension, obesity and cardiovascular diseases are associated with disease severity, and predispose to a worse prognosis (Lotfi and Rezaei, 2020). This implies that with high probability, the COVID-19 patients with ARDS are under chronic therapies to treat their comorbidities. In this frame, we need to take into account the potential interaction of CBD with therapeutics like antiplatelet, antiarrhythmic, antihypertensive, or lipid-lowering drugs like statins, some of which are metabolized by CYP450 and/or UGTs (Brown and Winterstein, 2019), to avoid the worsening of liver and kidney injuries in COVID-19 patients (Lotfi and Rezaei, 2020).
Last but not least, it is reported that to exert their action, some cannabinoids require membrane lipid rafts integrity (Sarnataro et al., 2006), where cannabinoid receptors are localized. To produce its proapoptotic effect in murine primary microglial cells, CBD induces a lipid rafts coalescence, an event specifically reverted by the cholesterol-depleting agent methyl-β-cyclodextrin (Wu et al., 2012), suggesting the key role of lipid rafts in CBD signaling. Even if the anti-inflammatory action of CBD seems to be cannabinoid receptor independent and considering that ACE2 receptor reside into lipid rafts, further investigations are needed to evaluate the potential impact of CBD on SARS-CoV-2–host cell interaction.
The current global emergency dictates the identification of therapeutics suitable to counteract the COVID-19 infection. CBD shows an interesting potential, but it is clear that further studies are required to corroborate this hypothesis, encompassing a clinical evaluation of risks and benefits of CBD use in SARS-CoV-2 patients.
MP and DF designed the General Commentary and drafted the manuscript; CP contributed to the preparation of the manuscript; MB and PG critically revised the manuscript for intellectual content and provided the funding source.
This study was partially supported by Regione Campania—Italy (POR Campania FESR 2014-2020—ASSE I 2020, grant to MB and PG). CP was supported by a PhD Program in Drug Discovery and Development-Department of Pharmacy, the University of Salerno.
Conflict of Interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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Keywords: cannabinoids, cannabidiol, SARS–CoV–2, COVID–19, pneumonia, ARDS
Citation: Bifulco M, Fiore D, Piscopo C, Gazzerro P and Proto MC (2021) Commentary: Use of Cannabinoids to Treat Acute Respiratory Distress Syndrome and Cytokine Storm Associated With Coronavirus Disease-2019. Front. Pharmacol. 12:631646. doi: 10.3389/fphar.2021.631646
Received: 20 November 2020; Accepted: 03 February 2021;
Published: 12 April 2021.
Stefania Tacconelli, University of Studies G. d’Annunzio Chieti and Pescara, Italy
Cristina Maccallini, University of Studies G. d’Annunzio Chieti and Pescara, Italy
Luciano De Petrocellis, Consiglio Nazionale delle Ricerche (CNR), Italy
Copyright © 2021 Bifulco, Fiore, Piscopo, Gazzerro and Proto. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Cannabidiol Treatment for Severe and Critical Coronavirus (COVID-19) Pulmonary Infection
Current management of COVID-19 (coronavirus) is mainly supportive, and respiratory failure from acute respiratory distress syndrome (ARDS) is the leading cause of mortality. Cytokines and chemokines are thought to play an important role in immunity and immunopathology during virus infections. Patients with severe COVID-19 have higher serum levels of pro-inflammatory cytokines (TNF-α, IL-1 and IL-6) and chemokines (IL-8) compared to individuals with mild disease or healthy controls, similar to patients with severe acute respiratory syndrome (SARS).
Cannabidiol (CBD), a nonpsychotropic ingredient of Cannabis sativa, possesses potent anti-inflammatory and immunosuppressive properties. These effects are mediated by T cell attrition and by inhibition of pro-inflammatory cytokine release (tumor necrosis factor-a, Interferon gamma, IL-1b, IL-6, and IL-17) and stimulation of anti-inflammatory cytokine production (IL-4, IL-5, IL-10, and IL-13). In a number of phase 2 trials involving more than 100 patients, our group was able to show the safety and efficacy of CBD in the prevention and treatment of graft-versus-host disease.
Based on these data, we will test the cytokine profile, safety and efficacy of CBD treatment in patients with severe and critical COVID-19 infection.
|Condition or disease||Intervention/treatment||Phase|
|COVID-19||Drug: Cannabidiol||Phase 1 Phase 2|
- Describe the impact of CBD on the cytokine profile in patients with severe and critical COVID-19 infection.
- Explore the safety and efficacy of CBD treatment in patients with severe and critical COVID-19 pulmonary Infection.
This is a single center, prospective open label phase 1/2-study which will be conducted in a Corona isolation ward.
Cannabidiol 5% dissolved in olive oil, will be given orally or through a nasogastric tube at a dose of 150 mg twice daily during 14 days or until discharge (the earliest). This dose is based on safety data generated from more than 100 transplanted patients. Treatment duration may be extended up to 28 days according to the physician discretion. In case of intolerance to the dose of 150 mg twice daily, the dose of CBD will be reduced to the maximal tolerated dose.
In the case of grade 4 side effects related to CBD or in the case of inability to provide the CBD during more the 3 days, the patient will be withdrawn from the study.