All Studies Meta Analysis

Are Non-Structural Proteins From SARS-CoV-2 the Target of Hydroxychloroquine? An in Silico Study

Guimarães Silva et al., ACTA MEDICA IRANICA, doi:10.18502/acta.v61i2.12533

Apr 2023

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HCQ for COVID-19

1st treatment shown to reduce risk in March 2020, now with p < 0.00000000001 from 419 studies, recognized in 46 countries.

Lower risk for mortality, hospitalization, progression, recovery, cases, and viral clearance.

No treatment is 100% effective. Protocols combine treatments.

5,100+ studies for 109 treatments. c19hcq.org

In Silico study showing that hydroxychloroquine (HCQ) binds to several SARS-CoV-2 non-structural proteins (NSPs) and human hemoglobin, suggesting potential therapeutic effects but also possible negative interactions. Authors found that HCQ bound to NSP3, NSP5, NSP9, NSP15, and the NSP7-NSP8-NSP12 and NSP10-NSP16 complexes with binding affinities below -6.0 kcal/mol, indicating significant interactions. Binding to these NSPs could interfere with viral replication, protein processing, and immune evasion. However, HCQ also bound to hemoglobin, which could worsen hypoxemia in COVID-19 patients. The findings may explain in part the observed benefits for early use but potential increased risk with use in very late stage severe disease.

38 preclinical studies support the efficacy of HCQ for COVID-19:

11 In Silico studies1-11

24 In Vitro studies1,12-34

3 In Vivo animal studies16,26,35

Important missing comments or errors? Let us know.

1. González-Paz et al., Biophysical Analysis of Potential Inhibitors of SARS-CoV-2 Cell Recognition and Their Effect on Viral Dynamics in Different Cell Types: A Computational Prediction from In Vitro Experimental Data, ACS Omega, doi:10.1021/acsomega.3c06968.acs.org, doi.org.

2. Alkafaas et al., A study on the effect of natural products against the transmission of B.1.1.529 Omicron, Virology Journal, doi:10.1186/s12985-023-02160-6.biomedcentral.com, doi.org.

3. Guimarães Silva et al., Are Non-Structural Proteins From SARS-CoV-2 the Target of Hydroxychloroquine? An in Silico Study, ACTA MEDICA IRANICA, doi:10.18502/acta.v61i2.12533.kne-publishing.com, doi.org.

4. Nguyen et al., The Potential of Ameliorating COVID-19 and Sequelae From Andrographis paniculata via Bioinformatics, Bioinformatics and Biology Insights, doi:10.1177/11779322221149622.sagepub.com, doi.org.

5. Navya et al., A computational study on hydroxychloroquine binding to target proteins related to SARS-COV-2 infection, Informatics in Medicine Unlocked, doi:10.1016/j.imu.2021.100714.sciencedirect.com, doi.org.

6. Yadav et al., Repurposing the Combination Drug of Favipiravir, Hydroxychloroquine and Oseltamivir as a Potential Inhibitor Against SARS-CoV-2: A Computational Study, Research Square, doi:10.21203/rs.3.rs-628277/v1.researchsquare.com, doi.org.

7. Hussein et al., Molecular Docking Identification for the efficacy of Some Zinc Complexes with Chloroquine and Hydroxychloroquine against Main Protease of COVID-19, Journal of Molecular Structure, doi:10.1016/j.molstruc.2021.129979.sciencedirect.com, doi.org.

8. Baildya et al., Inhibitory capacity of Chloroquine against SARS-COV-2 by effective binding with Angiotensin converting enzyme-2 receptor: An insight from molecular docking and MD-simulation studies, Journal of Molecular Structure, doi:10.1016/j.molstruc.2021.129891.sciencedirect.com, doi.org.

9. Noureddine et al., Quantum chemical studies on molecular structure, AIM, ELF, RDG and antiviral activities of hybrid hydroxychloroquine in the treatment of COVID-19: molecular docking and DFT calculations, Journal of King Saud University - Science, doi:10.1016/j.jksus.2020.101334.sciencedirect.com, doi.org.

10. Tarek et al., Pharmacokinetic Basis of the Hydroxychloroquine Response in COVID-19: Implications for Therapy and Prevention, European Journal of Drug Metabolism and Pharmacokinetics, doi:10.1007/s13318-020-00640-6.springer.com, doi.org.

11. Rowland Yeo et al., Impact of Disease on Plasma and Lung Exposure of Chloroquine, Hydroxychloroquine and Azithromycin: Application of PBPK Modeling, Clinical Pharmacology & Therapeutics, doi:10.1002/cpt.1955.wiley.com, doi.org.

12. Hitti et al., Hydroxychloroquine attenuates double-stranded RNA-stimulated hyper-phosphorylation of tristetraprolin/ZFP36 and AU-rich mRNA stabilization, Immunology, doi:10.1111/imm.13835.wiley.com, doi.org.

13. Yan et al., Super-resolution imaging reveals the mechanism of endosomal acidification inhibitors against SARS-CoV-2 infection, ChemBioChem, doi:10.1002/cbic.202400404.wiley.com, doi.org.

14. Mohd Abd Razak et al., In Vitro Anti-SARS-CoV-2 Activities of Curcumin and Selected Phenolic Compounds, Natural Product Communications, doi:10.1177/1934578X231188861.sagepub.com, doi.org.

15. Alsmadi et al., The In Vitro, In Vivo, and PBPK Evaluation of a Novel Lung-Targeted Cardiac-Safe Hydroxychloroquine Inhalation Aerogel, AAPS PharmSciTech, doi:10.1208/s12249-023-02627-3.springer.com, doi.org.

16. Wen et al., Cholinergic α7 nAChR signaling suppresses SARS-CoV-2 infection and inflammation in lung epithelial cells, Journal of Molecular Cell Biology, doi:10.1093/jmcb/mjad048.oup.com, doi.org.

17. Kamga Kapchoup et al., In vitro effect of hydroxychloroquine on pluripotent stem cells and their cardiomyocytes derivatives, Frontiers in Pharmacology, doi:10.3389/fphar.2023.1128382.frontiersin.org, doi.org.

18. Milan Bonotto et al., Cathepsin inhibitors nitroxoline and its derivatives inhibit SARS-CoV-2 infection, Antiviral Research, doi:10.1016/j.antiviral.2023.105655.sciencedirect.com, doi.org.

19. Miao et al., SIM imaging resolves endocytosis of SARS-CoV-2 spike RBD in living cells, Cell Chemical Biology, doi:10.1016/j.chembiol.2023.02.001.sciencedirect.com, doi.org.

20. Yuan et al., Hydroxychloroquine blocks SARS-CoV-2 entry into the endocytic pathway in mammalian cell culture, Communications Biology, doi:10.1038/s42003-022-03841-8.nature.com, doi.org.

21. Faísca et al., Enhanced In Vitro Antiviral Activity of Hydroxychloroquine Ionic Liquids against SARS-CoV-2, Pharmaceutics, doi:10.3390/pharmaceutics14040877.mdpi.com, doi.org.

22. Delandre et al., Antiviral Activity of Repurposing Ivermectin against a Panel of 30 Clinical SARS-CoV-2 Strains Belonging to 14 Variants, Pharmaceuticals, doi:10.3390/ph15040445.mdpi.com, doi.org.

23. Purwati et al., An in vitro study of dual drug combinations of anti-viral agents, antibiotics, and/or hydroxychloroquine against the SARS-CoV-2 virus isolated from hospitalized patients in Surabaya, Indonesia, PLOS One, doi:10.1371/journal.pone.0252302.plos.org, doi.org.

24. Zhang et al., SARS-CoV-2 spike protein dictates syncytium-mediated lymphocyte elimination, Cell Death & Differentiation, doi:10.1038/s41418-021-00782-3.nature.com, doi.org.

25. Dang et al., Structural basis of anti-SARS-CoV-2 activity of hydroxychloroquine: specific binding to NTD/CTD and disruption of LLPS of N protein, bioRxiv, doi:10.1101/2021.03.16.435741.biorxiv.org, doi.org.

26. Shang et al., Inhibitors of endosomal acidification suppress SARS-CoV-2 replication and relieve viral pneumonia in hACE2 transgenic mice, Virology Journal, doi:10.1186/s12985-021-01515-1.biomedcentral.com, doi.org.

27. Wang et al., Chloroquine and hydroxychloroquine as ACE2 blockers to inhibit viropexis of 2019-nCoV Spike pseudotyped virus, Phytomedicine, doi:10.1016/j.phymed.2020.153333.nih.gov, doi.org.

28. Sheaff, R., A New Model of SARS-CoV-2 Infection Based on (Hydroxy)Chloroquine Activity, bioRxiv, doi:10.1101/2020.08.02.232892.biorxiv.org, doi.org.

29. Ou et al., Hydroxychloroquine-mediated inhibition of SARS-CoV-2 entry is attenuated by TMPRSS2, PLOS Pathogens, doi:10.1371/journal.ppat.1009212.plos.org, doi.org.

30. Andreani et al., In vitro testing of combined hydroxychloroquine and azithromycin on SARS-CoV-2 shows synergistic effect, Microbial Pathogenesis, doi:10.1016/j.micpath.2020.104228.sciencedirect.com, doi.org.

31. Clementi et al., Combined Prophylactic and Therapeutic Use Maximizes Hydroxychloroquine Anti-SARS-CoV-2 Effects in vitro, Front. Microbiol., 10 July 2020, doi:10.3389/fmicb.2020.01704.frontiersin.org, doi.org.

32. Liu et al., Hydroxychloroquine, a less toxic derivative of chloroquine, is effective in inhibiting SARS-CoV-2 infection in vitro, Cell Discovery 6, 16 (2020), doi:10.1038/s41421-020-0156-0.nature.com, doi.org.

33. Yao et al., In Vitro Antiviral Activity and Projection of Optimized Dosing Design of Hydroxychloroquine for the Treatment of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), Clin. Infect. Dis., 2020 Mar 9, doi:10.1093/cid/ciaa237.oup.com, doi.org.

34. Wang (B) et al., Remdesivir and chloroquine effectively inhibit the recently emerged novel coronavirus (2019-nCoV) in vitro, Cell Res. 30, 269–271, doi:10.1038/s41422-020-0282-0.nature.com, doi.org.

35. Shu-Han Lin et al., Inhalable Chitosan-Based Hydrogel as a Mucosal Adjuvant for Hydroxychloroquine in the Treatment for SARS-CoV-2 Infection in a Hamster Model, Journal of Microbiology, Immunology and Infection, doi:10.1016/j.jmii.2023.08.001.sciencedirect.com, doi.org.

Guimarães Silva et al., 18 Apr 2023, peer-reviewed, 6 authors. Contact: erikyfgs2013@hotmail.com.

In Silico studies are an important part of preclinical research, however results may be very different in vivo.

This Paper HCQ All

Are Non-Structural Proteins From SARS-CoV-2 the Target of Hydroxychloroquine? An in Silico Study

E F Guimarães, Ériky Fernandes, Guimarães Silva, Bruna Fernandes, Gabriel Luan, Angélica Pinto, Fátima De, Anderson Dillmann Marcussi, Groto, Nayara Kádima, Teixeira

COVID-19 is caused by SARS-CoV-2 which has structural and non-structural proteins (NSP) essential for infection and viral replication. There is a possible binding of SARS-CoV-2 to the beta-1 chain of hemoglobin in red blood cells and thus, decreasing the oxygen transport capacity. Since hydroxychloroquine (HCQ) can accumulate in red cells, there is a chance of interaction of this drug with the virus. To analyze possible interactions between SARS-CoV-2 NSP and hemoglobin with the HCQ using molecular docking and implications for the infected host. This research consisted of a study using bioinformatics tools. The files of the protein structures and HCQ were prepared using the AutoDock Tools software. These files were used to perform molecular docking simulations by AutoDock Vina. The binding affinity report of the generated conformers was analyzed using PyMol software, as well as the chemical bonds formed. The results showed that HCQ is capable of interacting with both SARS-CoV-2 NSP and human hemoglobin. The HCQ/NSP3 conformer, HCQ/NSP5, HCQ/NSP7-NSP8-NSP12, HCQ/NSP9, HCQ/NSP10-NSP16 showed binding affinity. In addition, the interaction between HCQ and hemoglobin resulted in polar bonds. Interaction between SARS-CoV-2 NSP and HCQ indicates that this drug possibly acts by preventing the continuity of infection.

Acta Medica Iranica, Vol. 61, No. 2 (2023) 103 on NSP, the therapeutic action of HCQ could not be effective since mechanisms such as cytokine storm could have already been activated by the course of infection.

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