Novel Strategies for the Treatment of COVID-19

SGLT2 Inhibitors in Long COVID Syndrome: Is There a Potential Role?

The coronavirus disease (COVID)-19 has turned into a pandemic causing a global public health crisis. While acute COVID-19 mainly affects the respiratory system and can cause acute respiratory distress syndrome, an association with persistent inflammatory stress affecting different organ systems has been elucidated in long COVID syndrome (LCS). Increased severity and mortality rates have been reported due to cardiophysiological and metabolic systemic disorders as well as multiorgan failure in COVID-19, additionally accompanied by chronic dyspnea and fatigue in LCS. Hence, novel therapies have been tested to improve the outcomes of LCS of which one potential candidate might be sodium-glucose cotransporter 2 (SGLT2) inhibitors. The aim of this narrative review was to discuss rationales for investigating SGLT2 inhibitor therapy in people suffering from LCS. In this regard, we discuss their potential positive effects-next to the well described "cardio-renal-metabolic" conditions-with a focus on potential anti-inflammatory and beneficial systemic effects in LCS. However, potential beneficial as well as potential disadvantageous effects of SGLT2 inhibitors on the prevalence and long-term outcomes of COVID-19 will need to be established in ongoing research.

VV116 as a potential treatment for COVID-19

INTRODUCTION

VV116 is a chemically-modified version of the antiviral remdesivir with oral bioavailability and potent activity against SARS-CoV-2.

AREAS COVERED

The optimal treatment of standard-risk outpatients who develop mild-to-moderate COVID-19 is controversial. While several therapeutic are currently recommended, including nirmatrelvir-ritonavir (Paxlovid), molnupiravir, and remdesivir, these treatments have substantial drawbacks, including drug-drug interactions and questionable efficacy in vaccinated adults. Novel therapeutic options are urgently needed.

EXPERT OPINION

On 28 December 2022, a phase 3, observer-blinded, randomized trial was published evaluating 771 symptomatic adults with mild-to-moderate COVID-19 with a high risk of progression to severe disease. Participants were assigned to receive a 5-day course of either Paxlovid)\, which is recommended by the World Health Organization for treating mild-to-moderate COVID-19, or VV116 and the primary end point was the time to sustained clinical recovery through day 28. Among study subjects, VV116 was found to be noninferior to Paxlovid with respect to the time to sustained clinical recovery and with fewer safety concerns. This manuscript examines what is known about VV116 and explores how this novel treatment option may be used in the future to address the ongoing SARS-CoV-2 pandemic.

An Overview of Repurposed Drugs for Potential COVID-19 Treatment

The COVID-19 pandemic caused by SARS-CoV-2 has placed severe constraints on healthcare systems around the globe. The SARS-CoV-2 virus has caused upheaval in the healthcare and economic sectors worldwide. On the 20th of May 2020, the World Health Organisation declared COVID-19 a global pandemic due to the unprecedented number of cases reported around the globe. As of the 4th of November 2022, there were 637,117,429 coronavirus cases reported globally by Worldometer stats, with 6,602,572 related deaths. In South Africa, there were approximately 4,029,496 coronavirus cases and 102,311 associated deaths. As such, there is a need for efficacious therapeutic regimes. There has been a paucity of knowledge encompassing the use of effective and specific antiviral drug therapies for treating COVID-19 since the outbreak. In this review, we provide valuable insights into the repurposing of current drugs for COVID-19. Drug repurposing provides a suitable option for the discovery of efficacious drugs for COVID-19, thereby decreasing the costs and turnaround times of drug development strategies. This review provides an overview of ten drugs, including antimalarial, antiparasitic, anti-inflammatory, nucleoside analogue, monoclonal-antibody drugs, that were repurposed for the potential treatment of COVID-19.