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Effects of catechin on a rodent model of autism spectrum disorder: implications for the role of nitric oxide in neuroinflammatory pathway

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Abstract

Aim

The present research work aims at deciphering the involvement of nitric oxide pathway and its modulation by ( ±)catechin hydrate in experimental paradigm of autism spectrum disorders (ASD).

Method

An intracerebroventricular infusion of 4 μl of 1 M propanoic acid was given in the anterior region of the lateral ventricle to induce autism-like phenotype in male rats. Oral administration of ( ±)catechin hydrate (25, 50, and 100 mg/kg) was initiated from the 3rd day lasting till the 28th day. L-NAME (50 mg/kg) and L-arginine (800 mg/kg) were also given individually as well as in combination to explore the ability of ( ±)catechin hydrate to act via nitric oxide pathway. Behavior test for sociability, stereotypy, anxiety, depression, and novelty, repetitive, and perseverative behavior was carried out between the 14th and 28th day. On the 29th day, animals were sacrificed, and levels of mitochondrial complexes and oxidative stress parameters were evaluated. We also estimated the levels of neuroinflammatory and apoptotic markers such as TNF-α, IL-6, NF-κB, IFN-γ, HSP-70, and caspase-3. To evaluate the involvement of nitric oxide pathway, the levels of iNOS and homocysteine were estimated.

Results

Treatment with ( ±)catechin hydrate significantly ameliorated behavioral, biochemical, neurological, and molecular deficits. Hence, ( ±)catechin hydrate has potential to be used as neurotherapeutic agent in ASD targeting nitric oxide pathway-mediated oxidative and nitrosative stress responsible for behavioral, biochemical, and molecular alterations via modulating nitric oxide pathway.

Conclusion

The evaluation of the levels of iNOS and homocysteine conclusively establishes the role of nitric oxide pathway in causing behavioral, biochemical, and molecular deficits and the beneficial effect of ( ±)catechin hydrate in restoring these alterations.

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Funding

Research grants sanctioned by the Department of Science and Technology (DST) to Dr. Anurag Kuhad file no. EMR/2017/003589 are fully acknowledged. Grants by UGC-NRC program of UIPS and DST-Purse grant of Panjab University are gratefully acknowledged. Grants of DST-FIST and UGC-CAS to the University Institute of Pharmaceutical Sciences (UIPS) are also acknowledged gratefully. AICTE-Post-graduate Fellowship to Mr. Rishab Mehta is also gratefully acknowledged.

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Authors and Affiliations

Authors

Contributions

RB, AK, and RM conceived and designed the research study. RM did the experimental work and compiled and analyzed results. RM and RB wrote the manuscript. AK approved and revised the final draft.

Corresponding authors

Correspondence to Ranjana Bhandari or Anurag Kuhad.

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Ethics approval

The experimental protocol was approved by the Institutional Animal Ethics Committee of Panjab University, Chandigarh (PU/45/99/CPCSEA /IAEC/2018/166) and was conducted under according to the guidelines given by Committee for the Purpose of Control and Supervision on Experiments on Animals (CPCSEA) for the use and care of experimental animals.

Conflict of interest

The authors declare no competing interests.

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Mehta, R., Bhandari, R. & Kuhad, A. Effects of catechin on a rodent model of autism spectrum disorder: implications for the role of nitric oxide in neuroinflammatory pathway. Psychopharmacology 238, 3249–3271 (2021). https://doi.org/10.1007/s00213-021-05941-5

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  • DOI: https://doi.org/10.1007/s00213-021-05941-5

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