Homologous acellular matrix graft for vaginal repair in rats: a pilot study for a new reconstructive approach.
The purpose of this paper is to investigate using an acellular matrix graft of vagina (VAMG) or bladder (BAMG) in vaginal reconstruction. In 18 rats, vaginal length was measured and a hysterectomy performed. In three control animals, the vaginal stump was closed. In eight rats, the vagina was augmented with a VAMG; in seven, a BAMG was used. After 2-12 weeks, the animals were sacrificed, the vaginal length was reevaluated, and the vaginas were prepared for histologic evaluation. In the controls, the vagina was markedly shorter postoperatively. In the grafted animals, vaginal length was not significantly less than preoperative values with either matrix. Epithelialization, vascularization, and alpha-actin expression in the grafts were consistently observed. Regeneration appeared to be slightly greater in the organ-specific vagina matrix. With either matrix, however, although the vaginal stump remained open, the grafts lost most of the lumen. Vaginal reconstruction with a vagina acellular matrix graft is technically feasible. If further experiments can address the problem of luminal collapse - with, for instance, tissue expanders in the matrix - this technique may offer an alternative to the complex therapeutic options currently available.
Wefer
Joerg
J
Klinik für Urologie, Medizinische Hochschule Hannover, 30623 Hannover, Germany. joerg.wefer@gmx.net
Sekido
Noritoshi
N
Sievert
Karl-Dietrich
KD
Schlote
Norbert
N
Nunes
Lora
L
Dahiya
Rajvir
R
Jonas
Udo
U
Tanagho
Emil A
EA
D000818:Animals; D004195:Disease Models, Animal; D005109:Extracellular Matrix / Q000473:pathology / Q000502:physiology / Q000637:transplantation*; D005240:Feasibility Studies; D005260:Female; D051381:Rats; D017207:Rats, Sprague-Dawley; D019651:Plastic Surgery Procedures / Q000379:methods*; D001743:Urinary Bladder / Q000473:pathology / Q000503:physiopathology / Q000637:transplantation*; D014621:Vagina / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D014623:Vaginal Diseases / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D014945:Wound Healing / Q000502:physiology