RESUMO
ABSTRACT Purpose: To identify the fetal stem cell (FSC) response to maternal renal injury with emphasis on renal integrity improvement and Y chromosome detection in damaged maternal kidney. Materials and Methods: Eight non-green fluorescent protein (GFP) transgenic Sprague-Dawley rats were mated with GFP-positive transgenic male rats. Renal damage was induced on the right kidney at gestational day 11. The same procedure was performed in eight non-pregnant rats as control group. Three months after delivery, right ne- phrectomy was performed in order to evaluate the injured kidney. The fresh perfused kidneys were stained with anti-GFP antibody. Polymerase chain reaction (PCR) assay was also performed for the Y chromosome detection. Cell culture was performed to detect the GFP-positive cells. Technetium-99m-DMSA renal scan and single-photon emission computed tomography (SPECT) were performed after renal damage induction and 3 months later to evaluate the improvement of renal integrity. Results: The presence of FSCs was confirmed by immune histochemical staining as well as immunofluorescent imaging of the damaged part. Gradient PCR of female rat purified DNA demonstrated the presence of Y-chromosome in the damaged maternal kidney. Moreover, the culture of kidney cells showed GPF- positive cells by immuno- fluorescence microscopy. The acute renal scar was repaired and the integrity of dam- aged kidney reached to near normal levels in experimental group as shown in DMSA scan. However, no significant improvement was observed in control group. Conclusion: FSC seems to be the main mechanism in repairing of the maternal renal injury during pregnancy as indicated by Y chromosome and GFP-positive cells in the sub-cultured medium.
Assuntos
Animais , Masculino , Feminino , Gravidez , Cicatrização/fisiologia , Quimerismo , Células-Tronco Fetais/fisiologia , Nefropatias/fisiopatologia , Troca Materno-Fetal/fisiologia , Fatores de Tempo , Cromossomo Y , Imuno-Histoquímica , Tomografia Computadorizada de Emissão de Fóton Único , Células Cultivadas , Reação em Cadeia da Polimerase , Imunofluorescência , Ratos Sprague-Dawley , Compostos Radiofarmacêuticos , Ácido Dimercaptossuccínico Tecnécio Tc 99m , Modelos Animais de Doenças , Nefropatias/patologia , Nefropatias/diagnóstico por imagemRESUMO
La utilización de células indiferenciadas embrionarias y de células diferenciadas inducidas para que se comporten como las anteriores permite dar origen adiferentes tejidos que pueden ser usados en medicina reconstructiva en reemplazo de los deteriorados...