title: Histological response to platelet-rich plasma added to polypropylene mesh implemented in rabbits.
abstract: BACKGROUND
  The platelet-rich plasma (PRP) is part of a set of biotechnologies, providing some growth factors that promote repair of different tissues. The polypropylene meshes (PPM) are applied in the correction of abdominal defects, pelvic floor and urinary incontinence, however, they induce many significant complications, as a result of an inappropriate inflammatory response.
  
  
  OBJECTIVE
  To investigate the changes caused by PRP associated with the implantation of PPM in the abdomen of female rabbits, in the production of collagen I and III and the inflammatory infiltrate (ININ).
  
  
  METHODS
  We performed implant meshes with and without PRP in adult rabbits (n=30) and euthanasia at 7, 30 and 90 days. Two plates were prepared from each animal and analyzed in five different fields. The ININ was evaluated by quantification of inflammatory cells using hematoxylin-eosin and the collagen by Sirius red method. The results were analyzed applying the Wilcoxon, Kruskal-Wallis, Junckheere and Friedmann tests.
  
  
  RESULTS
  There was a significant difference in the number of inflammatory cells between the groups with and without PRP (p=0.01) at 90 days. There was increased production of collagen I, III and total with the use of PRP, at seven days.
  
  
  CONCLUSIONS
  The PPM coating with PRP was associated with increased ININ at the implant area, and an increasing trend during the process of tissue repair. The PPM coated with PRP was related to increased concentration of collagen I, collagen III and the concentration of total collagen increased after seven days of implantation.
authors: Departamento de Cirurgia, Universidade do Oeste Paulista, Presidente Prudente, São Paulo, Brasil.
authors: Oscar Rubini
authors: OR
authors: Ávila
authors: Departamento de Cirurgia, Universidade Estadual de Londrina, Londrina, Paraná, Brasil.
authors: Natália Gomes
authors: NG
authors: Parizzi
authors: Departamento de Cirurgia, Universidade Estadual de Londrina, Londrina, Paraná, Brasil.
authors: Ana Paula Mayumi
authors: AP
authors: Souza
authors: Departamento de Cirurgia, Universidade Estadual de Londrina, Londrina, Paraná, Brasil.
authors: Dayane Silvestre
authors: DS
authors: Botini
authors: Departamento de Cirurgia, Universidade Estadual de Londrina, Londrina, Paraná, Brasil.
authors: João Ytimura
authors: JY
authors: Alves
authors: Departamento de Cirurgia, Universidade Estadual de Londrina, Londrina, Paraná, Brasil.
authors: Silvio Henrique Maia
authors: SH
authors: Almeida
mesh_terms: D000818:Animals; D003094:Collagen / Q000032:analysis / Q000187:drug effects*; D004195:Disease Models, Animal; D005260:Female; D007249:Inflammation / Q000473:pathology / Q000517:prevention & control*; D008422:Materials Testing; D010976:Platelet Count; D053657:Platelet-Rich Plasma / Q000737:chemistry*; D011126:Polypropylenes / Q000494:pharmacology*; D011817:Rabbits; D015203:Reproducibility of Results; D013526:Surgical Mesh; D013997:Time Factors; D014945:Wound Healing / Q000187:drug effects
chemical_list: D011126:Polypropylenes; D003094:Collagen
keywords: Blood Platelets ; Histological Techniques; Rats