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Involvement of a neutrophil-mast cell axis in the effects of Piper malacophyllum (C. PESL) C. DC extract and its isolated compounds in a mouse model of dysmenorrhoea

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Abstract

The effects of Piper malacophyllum (C. Pesl) C. DC extracts and its isolated compounds were analysed in a mouse model of primary dysmenorrhoea (PD). Female Swiss mice (6–8 weeks old) on proestrus were intraperitoneally treated with estradiol benzoate for 3 days, to induce PD. Twenty-four hours later, animals were treated 24 h later with vehicle, plant extract, gibbilimbol B, 4,6-dimethoxy-5-E-phenylbutenolide, mixture of 4,6-dimethoxy-5-E-phenylbutenolide and 4,6-dimethoxy-5-Z-phenylbutenolide, or ibuprofen. One hour later, oxytocin was injected and the numbers of abdominal writhing were counted. Then, mice were euthanized and uteri were collected for morphometrical and histological analyses. The effects of P. malacophyllum in inflammation were investigated in mouse peritoneal neutrophils culture stimulated with LPS or fMLP (chemotaxis and mediator release). Finally, uterus contractile and relaxing responses were assessed. Similar to ibuprofen, P. malacophyllum extract and isolated compounds reduced abdominal writhing in mice with PD. Histology indicated a marked neutrophil and mast cell infiltrate in the uterus of PD animals which was attenuated by the extract. The compounds and the extract reduced neutrophil chemotaxis and inflammatory mediator release by these cells. Reduced TNF levels were also observed in uteri of PD mice treated with P. malacophyllum. The extract did not affect spontaneous uterine contractions nor those induced by carbachol or KCl. However, it caused relaxation of oxytocin-induced uterine contraction, an effect blunted by H1 receptor antagonist. Overall the results indicate that P. malacophyllum may represent interesting natural tools for reliving PD symptoms, reducing the triad of pain, inflammation and spasmodic uterus behaviour.

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Acknowledgements

This work was supported by grants and financial support from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), the Fundação de Apoio a Pesquisa Científica e Tecnológica do Estado de Santa Catarina (FAPESC), MCTI/CNPQ/CAPES/FAPS Nº 16/2014 – INCT INOVAMED; (process # 465430/2014-7) Brasil. The co-authors were supported by grants, as following: J.P.R. and M.C.C (Programa de Bolsas Universitárias de Santa Catarina – UNIEDU Bolsa do Art. 170 da Constituição Estadual), L.B., R.N., C.R.V. (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPES), J.M. and F.C.G. (Programa FAPESC/CAPES de Recursos Humanos em CTI), N.L.M.Q. (CNPq – 305550/2018-7), J.R.S. (CNPq—process # 429505/2018-3; 310326/2020-6). R.C.V.S. is grateful for the Post-Doctoral scholarship and financial support from PNPD/CAPES.

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JRS, NLMQ and PS conceived and designed research. JPV, LB, RN, FCG, MSC, RCVS, JM, CRV, JCPW, FWRJ and MCC conducted experiments. AM and CMS contributed with analytical tools. JRS, NLMQ, MVDP, PS and AM analysed data. JRS, NLMQ, AM, CMS and PS drafted, critically revised and wrote the final manuscript. All authors read and approved the manuscript.

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Correspondence to José Roberto Santin.

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Quintão, N.L.M., Reis, J.P., Benvenutti, L. et al. Involvement of a neutrophil-mast cell axis in the effects of Piper malacophyllum (C. PESL) C. DC extract and its isolated compounds in a mouse model of dysmenorrhoea. Inflammopharmacol 30, 2489–2504 (2022). https://doi.org/10.1007/s10787-022-01032-9

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  • DOI: https://doi.org/10.1007/s10787-022-01032-9

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