Immunohistochemical evaluation of Cajal-like cells and Caveolin-1 levels at ureteropelvic junction obstruction.

Abstract:

OBJECTIVE:To compare c-kit-positive interstitial Cajal-like cells (ICC) and Caveolin-1 protein levels as a pacemaker and signaling molecules, on ureteropelvic junction (UPJ) specimens, between two groups of pediatric patients with and without ureteropelvic junction obstruction (UPJO). METHODS:We evaluated the UPJ specimens of 45 pediatric patients operated between 2005- 2012 retrospectively. Group 1 included 37 patients who underwent dismembered pyeloplasty due to UPJO. Eight patients underwent nephrectomy by the other reasons (renal tumor, trauma etc) and had normal UPJ were accepted as Group 2. The specimens were examined immunohistochemically with CD117 and Caveolin-1 antibody. According to the total number of ICC; 0-5 cells were accepted as a few (1), 610 cells as moderate (2), and > 10 as many (3). According to the staining intensity of Caveolin-1 at muscle tissue, a subjective evaluation was performed as; mild staining (1), moderate staining (2) and strong staining (3). RESULTS:The mean value of ICC distribution was calculated 1.37 ± 0.54 in Group 1 and 2.13 ± 0.64 in Group 2 (p = 0.003), and the median value of ICC distribution was found 1 [1-3] in Group 1 and 2 [1-3] in Group 2 (p = 0.008). Median values for the intensity of staining with Caveolin-1 were found 2 [1-3] in the Group 1, and 2.5 [2-3] in the Group 2 (p = 0.025). CONCLUSIONS:A decrease in ICC and Caveolin-1 levels support that there may be a relationship between ICC and Caveolin-1 for UPJO associated with signal transduction and peristalsis in urinary system. OBJETIVO:Comparar las células intersticiales Cajal-like, c-kit positivas, y los niveles de proteína Caveolina -1 como marcapasos y moléculas señalizadoras en piezas de unión pieloureteral (UPU) comparando dos grupos de pacientes pediátricos con o sin obstrucción de la UPU.MÉTODOS: Evaluamos retrospectivamente las piezas obtenidas en la operación de 45 pacientes pediátricos entre 2005-2012. El grupo 1 incluía 37 pacientes sometidos a pieloplastia desmembrada por estenosis de UPU. Ocho pacientes que fueron sometidos a nefrectomía por otras razones (tumor renal, traumatismo, etc) y tenían una UPU normal se incluyeron en el grupo 2. Las piezas fueron examinadas mediante inmunohistoquímica con CD117 y Caveolina-1 en el tejido muscular. Se realizó una evaluación subjetiva como: tinción leve (1), tinción moderada (2) y tinción fuerte (3). RESULTADOS:Se calculó el valor medio de la distribución de las células intersticiales de Cajal (CIC), 1,37 ± 0,54 en el Grupo 1 y 2,13 ± 0,64 en el Grupo 2 (p = 0,003), y la mediana, de 1 [1-3] en el Grupo 1 y 2 [1-3] en el Grupo 2 (p = 0,008). Los valores de la mediana para la intensidad de la tinción con Caveolina- 1 fueron de 2 [1-3] en el Grupo 1 y 2,5 [2-3] en el Grupo 2 (p = 0,025). CONCLUSIONES:Una disminución de las células intersticiales de Cajal y los niveles de Caveolina 1 apoyan que puede haber una relación entre las células intersticiales de Cajal y la Caveolina 1 en la estenosis de la UPU asociada con la transducción de la señal y el peristaltismo en el sistema urinario.

journal_name

Arch Esp Urol

authors

Bayrak O,Basmaci I,Bozdag Z,Sen H,Erturhan S,Balat A,Seckiner I

subject

Has Abstract

pub_date

2019-09-01 00:00:00

pages

690-696

issue

7

eissn

0004-0614

issn

1576-8260

pii

2019-72-7-4dc1e6ad797e3bfd11cc8a55db3fbc18c2a375f9

journal_volume

72

pub_type

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