RESUMO
BACKGROUND/AIMS: Signaling pathways via integrin-linked kinase (ILK) and beta-catenin are important in the initiation and progression of various malignant diseases. ILK modulates the transcription of beta-catenin and is implicated in cell migration and invasiveness. Recently, premalignant colon polyps were found to express ILK and beta-catenin. Therefore, we investigated the expression of ILK and beta-catenin in colon polyps according to the gross morphology and pathologic type. METHODS: Based on morphology, colon polyps (62) were classified as being a pedunculated polyp (Ip, 16), sessile polyp (Is, 22), or laterally spreading tumor (LST, 24). The colon polyps were classified pathologically as tubular adenomas (TAs, 47) and hyperplastic polyps (HPs, 15). The expression levels of ILK and beta-catenin in colon polyps and normal colon (6) were evaluated with immunohistochemistry. RESULTS: In normal colon, ILK was not expressed, and beta-catenin stained in the cell membrane only. Based on the gross morphology of the colon polyps, no significant difference was seen in the expression of ILK and beta-catenin (p>0.05). The expression of both ILK and beta-catenin in TAs was greater than that in HPs (p<0.01): the greater the dysplasia in TAs, the more both ILK and beta-catenin were expressed (p<0.05). The grade of expression of ILK was correlated with that of beta-catenin in colon polyps (p<0.01). CONCLUSIONS: The expression of ILK and beta-catenin did not differ according to the morphology of colon polyps, but was expressed more in TAs than in HPs, especially in severe dysplasia.
Assuntos
Adenoma , beta Catenina , Membrana Celular , Movimento Celular , Colo , Imuno-Histoquímica , Fosfotransferases , Pólipos , Proteínas Serina-Treonina Quinases , ProteínasRESUMO
BACKGROUND/AIMS: Bone marrow-derived cells (BMDC) contribute to tissue maintenance under many kinds of pathologic conditions. We carried out a study to see how BMDC play a role in the treatment of experimental murine colitis. METHODS: We divided the animals into 3 groups and treated them with 50% ethanol (control group), 2,4,6-trinitrobenzene sulfinic acid colitis (TNBS group), and TNBS+bone marrow transplant (BMT group). To induce colitis, TNBS (5.0 mg/mouse) dissolved in 50% ethanol was injected into anus weekly for two weeks. Bone marrow transplantations were performed using bone marrow of male transgenic mouse (donor) with green fluoresence protein (GFP) into female wild type mouse (recipient) three weeks before TNBS instillation. All animals were sacrificed, and colons were extracted one week after the last TNBS instillation. We measured microscopic scores of mucosal injury and investigated the GFP expression for bone marrow engraftment. The immunostaining of vimentin and alpha-smooth muscle actin (alpha-SMA) for myofibroblasts was performed. RESULTS: The score of mucosal injury in the TNBS group was much more severe than those in control, and reduced significantly by BMT (p<0.05). GFP-positive cells were almost deposited in pericryptal niche of BMT group but not at all in both control and TNBS group. Most of myofibroblasts stained with both vimentin and SMA also infiltrated into pericryptal niche. But, the number of myofibroblasts stained with vimentin and SMA in both control and TNBS group was smaller than that in BMT group. CONCLUSIONS: BMDC deposited on pericryptal niche might have a significant role in repairing acute experimental murine colitis.
Assuntos
Animais , Feminino , Masculino , Camundongos , Actinas/metabolismo , Doença Aguda , Transplante de Medula Óssea , Colite/induzido quimicamente , Fibroblastos/citologia , Mucosa Intestinal/citologia , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Transplante Homólogo , Ácido Trinitrobenzenossulfônico/toxicidade , Vimentina/metabolismoRESUMO
PURPOSE: NPI (Nottingham prognostic index) including tumor size, lymph node status and histological grade is widely used for the estimation of prognosis in breast carcinomas, and recently, the immunohistochemical index (IHPI) using ER, PR, c-erbB-2, and p53 expressions was suggested as an useful prognosticator. The aim of this study is to evaluate the reliability of NPI and IHPIs in 141 breast carcinomas. METHODS: Statistical analysis among size, lymph node status, histological grade, NPI, ER, PR, c-erbB-2, p53 and MIB-1 labelling index(LI) and IHPIs were performed. The IHPI-1 battery consisted of ER, PR, c-erbB-2 and p53. In the IHPI-2 battery, MIB-1 LI was added to the IHPI-1 battery. In the IHPI-3 battery, MIB-1 LI was also added, but ER and PR were not included. RESULTS: The prognostic estimation based on NPI showed significant relationships with PR, c-erbB-2, MIB-1, and the prognostic estimations according to IHPI-1, IHPI-2 and IHPI-3 battery. In addition, MIB-1 LI revealed a positive relationship to the histological grade. The prognostic estimation based on IHPI-3 showed a positive relationship to the lymph node status. CONCLUSION: The prognostic estimation based on NPI and a battery of immunohistochemical stains consisted of c-erbB-2, p53 and MIB-1 seem to be reliable in breast carcinomas.