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Actions of Cannabis sativa L. fixed oil and nano-emulsion on venom-induced inflammation of Bothrops moojeni snake in rats

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Abstract

Background

Bothrops moojeni snake venom (VBm) has toxins that cause pronounced tissue damage and exacerbated inflammatory reaction. Cannabis sativa L. is a plant species that produces an oil (CSO) rich in unsaturated fatty acids. Nano-emulsions have several advantages, such as better stability and higher penetrating power in membranes. Therefore, this study evaluated the effect of a nano-emulsion based on this herbal derivative (NCS) against VBm-induced inflammation in Wistar rats.

Methods

The CSO and NCS were submitted to physicochemical characterization. The inflammatory process was induced by the VBm (0.10 mg/kg) as follows: rat paw edema, peritonitis, analysis of leukocyte infiltrate in gastrocnemius muscle of rats and formation of granulomatous tissue.

Results

No significant changes were observed when the NCS was submitted to the centrifugation and thermal stress tests. There was no phase separation, changes in density (0.978 ± 0.01 g/cm3) and viscosity (0.889 ± 0.15). The droplet diameter ranged from 119.7 ± 065 to 129.3 ± 0.15 nm and the polydispersity index ranged from 0.22 ± 0.008 to 0.23 ± 0.011. The results showed that treatments with CSO (200 and 400 mg/kg) and NCS (100 mg/kg) were able to decrease significantly (p < 0.001) the formation of edema and granulomatous tissue. The CSO and NCS groups significantly attenuated (p < 0.001) the recruitment of inflammatory cells in the tests for peritonitis and leukocyte infiltrate. The histopathological analysis of the gastrocnemius muscle showed a reduction in tissue damage caused by VBm.

Conclusion

The results obtained in this study showed anti-inflammatory activity of the CSO which may be due to a high UFA content. The nanosizing, as evidenced by the incorporation of the CSO in the NCS improved the effect and opens the perspective for the obtainment of a nanomedicine in which a kinetic stable phytotherapic can be used at low doses.

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Abbreviations

AUC:

Area on the curve

CK:

Creatine kinase

CS:

Cannabis sativa L.

GC–MS:

Gas chromatography coupled to mass spectrometry

HLDs:

Hyaluronidases

i.m:

Intramuscular

IL-1β:

Interleukin-1β

IL-6:

Interleukin-6

LTB4 :

Leukotriene B4

MNs:

Leukocytes mononuclear

NCS:

Nanoemulsion from fixed oil from Cannabis sativa L.

NF-κB:

Nuclear factor κB

CSO:

Fixed oil from Cannabis sativa L.

PGE2 :

Prostaglandin E2

PGI2 :

Prostacyclin

PLA2 :

Phospholipase A2

PMNs:

Polymorphonuclear

po:

Per os

PPARs:

Receptors activated by peroxisome proliferators

SVMPs:

Metalloproteinases

TNF-α:

Tumor necrosis factor-alpha

TXA2 :

Thromboxane A2

UFA:

Unsaturated fatty acids

VBm:

Bothrops moojeni Snake venom

References

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Acknowledgements

This study was funded by the CAPES (1723/2018-00 PROCAD-AMAZONIA), CNPq (Proc.402332/2013-0), and INCT North-Northeast Network of Phytoproducts—CNPq.

Funding

CAPES (1723/2018-00 PROCAD-AMAZONIA), CNPq (Proc.402332/2013-0), and INCT North-Northeast Network of Phytoproducts—CNPq.

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Authors and Affiliations

Authors

Contributions

HOC, DESG, KRTP, and AVTLTS, realized the analytics experiments and pharmacological assays. HOC supervised the pharmacologic tests. ML was responsible for the collected venom snack. CPF and IMF supervised the analytics experiments. XH, reviewed the results and final text and JCTC, study General Coordinator. All authors read and approved the final manuscript.

Corresponding author

Correspondence to José Carlos Tavares Carvalho.

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Conflict of interest

The authors declare that they have no known competing for financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Ethical approval

The authors followed the guidelines of the legislation for animal experimentation established by the National Council for Animal Experimentation of Brazil (CONCEA). The project was approved by the Ethics Committee on the Use of Animals (CEUA) of the Federal University of Amapá-UNIFAP under protocol number 015/2018.

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de Oliveira Carvalho, H., Gonçalves, D.E.S., Picanço, K.R.T. et al. Actions of Cannabis sativa L. fixed oil and nano-emulsion on venom-induced inflammation of Bothrops moojeni snake in rats. Inflammopharmacol 29, 123–135 (2021). https://doi.org/10.1007/s10787-020-00754-y

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  • DOI: https://doi.org/10.1007/s10787-020-00754-y

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