Abstract
This study aimed to assess the efficacy of ethanolic extract of Solanum torvum L. fruit (EESTF) containing solasodine in treating chronic constriction injury (CCI)–induced neuropathic pain in rats. Three-dimensional (3D) simulation studies of solasodine binding were conducted on the TRPV1 receptor, IL-6, and TNF-α structures. For in vivo justification, an assessment of behavioral, biochemical, and histological changes was designed after a CCI-induced neuropathic pain model in rats. On days 7, 14, and 21, CCI significantly increased mechanical, thermal, and cold allodynia while producing a functional deficit. IL-6, TNF-α, TBARS, and MPO levels also increased. SOD levels of catalase and reduced glutathione levels also decreased. Administration of pregabalin (30 mg/kg, oral), solasodine (25 mg/kg, oral), and EESTF (100 and 300 mg/kg, oral) significantly reduced CCI-induced behavioral and biochemical changes (P < 0.05). The protective nature of EESTF was also confirmed by histological analysis. Capsaicin, a TRPV1 receptor agonist, abolished the antinociceptive effects of EESTF when used previously. From the observations of the docking studies, solasodine acted as an antagonist at TRPV1, whereas the docking scores of solasodine against TNF-α and IL-6 were reported to be −11.2 and −6.04 kcal/mol, respectively. The attenuating effect of EESTF might be related to its antagonistic effects on TRPV1, suppression of cytokines, and anti-inflammatory and antioxidant properties.
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Acknowledgements
The authors are grateful to UGC, India, for their funding support as a minor research project grant (letter no.—F. No. 41-1371/2012(SR)). The authors are also thankful to Banasthali Vidyapith for providing basic facilities for the research work.
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This work was supported by UGC, India (grant numbers: F.No. 41-1371/2012(SR)).
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All authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by Saurabh K. Sinha, Kajol Rustage, Ashutosh Pareek, Manish Srivastava, Mukesh K. Meena, Anshul Shakya, Nitish Rai, Aaushi Pareek, Yashumati Ratan, Min Hua Chen, Satyendra Kumar Prasad, and Ghulam Md Ashraf. The first draft of the manuscript was written by Vivek Jain, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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All the animal experiments (Ref. no.-BU/BT/397/13-14) were preapproved by the Institutional Animal Ethical Committee of Banasthali Vidyapith, and animal experiments were performed according to CPCSEA guidelines.
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Jain, V., Sinha, S.K., Rustage, K. et al. Solasodine Containing Solanum torvum L. Fruit Extract Prevents Chronic Constriction Injury-Induced Neuropathic Pain in Rats: In Silico and In Vivo Evidence of TRPV1 Receptor and Cytokine Inhibition. Mol Neurobiol 60, 5378–5394 (2023). https://doi.org/10.1007/s12035-023-03412-w
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DOI: https://doi.org/10.1007/s12035-023-03412-w