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Modifying effects of nerolidol on cell surface glycoconjugates and suppressed inflammation during DMBA-induced oral carcinogenesis: An in vivo and in silico

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Abstract

Oral squamous cell carcinomas (OSCC) were created in the buccal pouches of golden Syrian hamsters by painting them three times a week with 0.5% DMBA in liquid paraffin for 12 weeks. The objective of this study was to evaluate the effects of nerolidol (NER) on the expression of inflammatory markers (TNF-α, NF-κB, and COX-2) and cell surface glycoconjugates in DMBA-induced hamster buccal pouch cancer. In DMBA alone treated hamsters, we observed 100% of well-differentiated OSCC development, changes in inflammation-related protein expression and abnormalities of glycoconjugates levels compared to control hamsters. Oral administration of NER (50 and 100 mg/kg body weight) restored the immunohistoexpression of inflammatory protein (TNF-α, NF-κB and COX-2) and glycoconjugates status in DMBA-induced buccal pouch hamsters. In addition, we used in-silico analysis to predict the nature of interactions when NER targeted inflammatory proteins (TNF-α, NF-κB and COX-2). The docking analysis of NER has low binding energy and higher binding affinity to bind with the above inflammatory markers. The stability of NER docked COX-2 protein complex was confirmed by molecular dynamics simulation using Desmond module of Schrodinger. Thus, the present study suggests that NER potentially prevented the altered immunohistoexpression of TNF-α, NF-κB and COX-2 proteins and abnormalities of cell surface glycoconjugates level in DMBA-induced oral cancer.

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All data is available from the authors upon request.

Abbreviations

NER:

Nerolidol

DMBA:

7, 1–2-Dimethylbenz (a) anthracene

TNF-α:

Tumor necrosis factor-alpha

NF-κB:

Nuclear factor kappa B

COX-2:

Cyclooxygenase-2

OSCC:

Oral squamous cell carcinoma

RMSD:

Root mean square Deviation

IHC:

Immunohistochemical

SPSS:

Statistical Package for the Social Sciences

PDB:

Protein data bank

RMSF:

Root mean square Fluctuation

MD:

Molecular dynamic simulation

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Acknowledgements

Indian Council of Medical Research (ICMR)] supported this study under [Grant No. 3/2/2/14/2020-NCD-III Dated: 24/12/2020], New Delhi, India, for providing financial support in the form of a Senior Research Fellowship to Miss. Vaitheeswari Balakrishnan.

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Correspondence to Sindhu Ganapathy.

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The experimental design got approval from the Institutional Animal ethics committee (IAEC) of Central animal house, Rajah Muthiah Medical College, Faculty of Medicine, Annamalai University (CPCSEA Registration No: 160/PO/ReBi/S/99/CPCSEA dated:25/11/19) (Proposal No: 1242, Dated:23.04.2019).

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Balakrishnan, V., Ganapathy, S., Veerasamy, V. et al. Modifying effects of nerolidol on cell surface glycoconjugates and suppressed inflammation during DMBA-induced oral carcinogenesis: An in vivo and in silico. Biologia 78, 529–541 (2023). https://doi.org/10.1007/s11756-022-01260-y

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  • DOI: https://doi.org/10.1007/s11756-022-01260-y

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