Preventive and therapeutic effects of relaxin on bisphosphonate-related osteonecrosis of the jaw: An experimental study in rats Efeitos preventivos e terapêuticos da relaxina na osteonecrose da mandíbula relacionada a bisfosfonatos: Um estudo experimental em ratos

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DEVELİ T., Uckan S., Bayram B., Deniz K., Erdem S. R., Ozdemir B. H., ...More

Brazilian Dental Science, vol.23, no.1, 2020 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.14295/bds.2020.v23i1.1846
  • Journal Name: Brazilian Dental Science
  • Journal Indexes: Scopus
  • Keywords: Animal model, BRONJ, Relaxin
  • Istanbul Medipol University Affiliated: Yes


Objective: Bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a challenging complication of chronic bisphosphonate (BP) use. The hormone relaxin is able to induce the multistep differentiation process of human osteoclastogenesis, exhibits anti-fibrotic and anti-inflammatory actions, and promotes vasodilatation, wound healing, and angiogenesis. The present study aimed to evaluate the effects of relaxin in the prevention and management of BRONJ. Material and Methods: Thirty-six male Sprague Dawley rats were randomly divided into four groups. Rats in group 1 (n = 10) received relaxin and BP simultaneously for 12 weeks. Rats in group 2 (n = 10) received injections of BP for 12 weeks, followed by relaxin for another 12 weeks. Rats in group 3 (n = 10) received only BP injections, and those in group 4 (control, n = 6) received only saline. Necrosis and inflammation in the rats’ mandibles were evaluated as indicators of BRONJ. Results: Necrosis and inflammation were not detected in group 1 (BP + relaxin). In group 3 (BP only), incidence rates of necrosis and inflammation were 90% and 60%, respectively. Conclusions: Our findings suggest that relaxin may be potently effective in preventing BRONJ and have some benefit in the treatment of existing BRONJ.