Abstract
Background
Recently, we have reported an isatin-derived carbohydrazone, 5-chloro-N'-(6-chloro-2-oxoindolin-3-ylidene)-2-hydroxybenzohydrazide (SIH 3) as dual nanomolar FAAH (fatty acid amide hydrolase)-MAGL (monoacylglycerol lipase) inhibitor with good CNS penetration and neuroprotective activity profile. In this study, we further investigated the pharmacological profile of compound SIH 3 in the neuropathic pain model along with acute toxicity and ex vivo studies.
Methods
Chronic constrictive injury (CCI) was used to induce neuropathic pain in male Sprague–Dawley rats and the anti-nociceptive activity of the compound SIH 3 was investigated at 25, 50, and 100 mg/kg ip. Subsequently, locomotor activity was measured by rotarod and actophotometer experiments. The acute oral toxicity of the compound was assessed as per the OECD guidelines 423.
Results
Compound SIH 3 showed significant anti-nociceptive activity in the CCI-induced neuropathic pain model without altering the locomotor activity. Furthermore, compound SIH 3 showed an excellent safety profile (up to 2000 mg/kg, po) in the acute oral toxicity study and was also non-hepatotoxic. Further, ex vivo studies revealed that the compound SIH 3 produces a significant antioxidant effect in oxidative stress induced by CCI.
Conclusion
Our findings suggest that the investigated compound SIH 3 has the potential to be developed as an anti-nociceptive agent.
Graphical abstract
Data availability
The majority of experimental data are included in the Supplementary data. Additional datasets generated during the current study are available from the corresponding author upon reasonable request.
Abbreviations
- AEA:
-
Anandamide
- 2-AG:
-
2-Arachidonoyl glycerol
- CB1/2:
-
Cannabinoid receptor 1/2
- CCI:
-
Chronic constrictive injury
- CAT:
-
Catalase
- ECS:
-
Endocannabinoid system
- FAAH:
-
Fatty acid amide hydrolase
- GSH:
-
Glutathione
- MAGL:
-
Monoacylglycerol lipase
- MDA:
-
Malonaldehyde
- MTDL:
-
Multi-target directed ligands
- NP:
-
Neuropathic pain
- ROS:
-
Reactive oxygen species
- SNL:
-
Spinal nerve ligation
- SOD:
-
Superoxide dismutase
- SGOT:
-
Serum glutamic-oxaloacetic transaminase
- SGPT:
-
Serum glutamic-pyruvic transaminase
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Funding
This work was supported by IIT (BHU) Varanasi as a teaching assistantship to Shivani J.
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Conceptualization: SJ, SRA; investigation: SJ, A; data analysis: SJ, A, VT; original draft preparation: SJ; review and editing: SRA, VT.
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Jaiswal, S., Akhilesh, Tiwari, V. et al. Anti-nociceptive potential of an isatin-derived dual fatty acid amide hydrolase-monoacylglycerol lipase inhibitor. Pharmacol. Rep 75, 737–745 (2023). https://doi.org/10.1007/s43440-023-00468-2
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DOI: https://doi.org/10.1007/s43440-023-00468-2