• 한국독성학회:학술대회논문집
• /
• 한국독성학회 2002년도 Molecular and Cellular Response to Toxic Substances
• /
• pp.107-114
• /
• 2002

Cholestatic liver injury results from the accumulation of toxic bile salts within the liver. The aim of the present study was to understand the mechanism of bile salts-induced hepatocellular apoptosis in bile duct-ligated (BDL) rats, using Western blot and immunohistochemical analysis.(omitted)

• 대한임상검사과학회지
• /
• 제39권3호
• /
• pp.223-230
• /
• 2007

Several methods have been used in the detection of Helicobacter pylori (H. pylori) which was believed to be a pathogenic organism causing chronic gastritis, benign peptic ulcer, gastric carcinoma or malignant lymphoma. Even though several methods were introduced for detection of H. pylori in stomach, there were controversies in their sensitivities and specificities. This experiment were designed to study the comparative analysis of staining methods (hematoxylin and eosin (H&E), Giemsa, Warthin-Starry and immunohistochemical stain) to dectect H. pylori in the gastric mucosa. The results were as follows. Average density score of H. pylori classified by Genta were 2.29 in Warthin-Starry stain, 2.19 in Giemsa stain, 1.34 in immunohistochemical stain and 0.98 in H&E stain. By comparison between inflammatory degree by Sydney system and result of Warthin-Starry stain, the detection rate and densities of H. pylori were increased from mild (61.5% and 0.8), moderate (90.4 and 2.1), and severe (100% and 3.2). From the above findings, Warthin-Starry stain is useful method for detection of H. pylori in gastric mucosa.

• Asian Pacific Journal of Cancer Prevention
• /
• 제14권3호
• /
• pp.1743-1746
• /
• 2013

Background and Purpose: Cardiac myxoma is a major primary heart tumor which often causes unexpected symptoms or sudden death. This present study was designed to investigate its clinical pathological features and biological behavior. Methods: A retrospective analysis of the clinical pathologic and immunohistochemical features of 66 cases with cardiac myxoma was conducted. Results: In 66 patients with cardiac myxoma, 61 cases had involvement of the left atrium, one case in both the right ventricular and left atria. The female: male ratio was 2.7:1. Patients had symptoms of blood flow obstruction and systemic alterations with performance of arterial embolization. Tumors were spherical, lobulated or irregular in shape, and soft and brittle. Immunohistochemical markers of vimentin and CD34 in tumor cells were positive. Conclusion: Cardiac myxoma always exists in the left atrium and is more common in women, with diverse clinical manifestations and pathomorphism. Although proliferative activity and the recurrence rate are low, in addition to thorough surgical resection, strengthened review is important for young patients.

• BMB Reports
• /
• 제41권4호
• /
• pp.322-327
• /
• 2008

In this study, we compared the gene expression profiles of non-syndromic hyperplastic dental follicle (HDF) fibroblasts and normal dental follicle (NDF) fibroblasts using cDNA micro-arrays, quantitative PCR, and immunohistochemical staining. Microarray analysis showed that several collagens genes were upregulated in the HDF's, including collagen types I, IV, VIII, and XI and TIMP-1, -3, and -4 (fold ratio > 2.0). In contrast, the expression of MMP-1, -3, -10, and -16 together with IL-8 was more than two fold downregulated. The differential expression of the genes encoding alkaline phosphatase, MMP-1, -3, -8, and IL-8 was confirmed by quantitative RT-PCR, while that of 24 HDFs and 18 NDFs was confirmed by immunohistochemical analysis. However, HDFs showed stronger expression of MMP-3 than NDFs (P < 0.001). Collectively, these results indicate that defective regulation of MMPs mediating connective tissue remodeling may be responsible for abnormal tooth eruption.

• Archives of Plastic Surgery
• /
• 제41권1호
• /
• pp.35-39
• /
• 2014

Background Aurora kinase A (Aurora-A) plays an important role in the regulation of mitosis and cytokinesis. Dysregulated Aurora-A leads to mitotic faults and results in pathological conditions. No studies on Aurora-A expression in human diabetic skin tissue have been reported. In light of this, we explored the expression of Aurora-A in human diabetic skin tissue. Methods Aurora-A protein was evaluated by western blotting in 6 human diabetic skin tissue and 6 normal skin specimens. Results Increased expression of Aurora-A protein was detected in all diabetic skin tissue samples in both western blot analysis and immunohistochemical staining. However, in the case of the normal skin tissue, no bands of Aurora-A protein were detected in either the western blotting analysis or the immunohistochemical staining. Conclusions Thus far, there have been no studies on the expression of Aurora-A in diabetic skin tissue. However, we believe that oxidative DNA damage related to the expression of Aurora-A protein and Aurora-A could be involved inhuman diabetic skin tissue.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제33권3호
• /
• pp.211-220
• /
• 2007

Objective: In organotypic culture of immortalized human oral keratinocytes (IHOK), the change of the growth and differentiation was investigated according to the fibroblast type and the involvement of mitogen-activated protein (MAP) kinase. Materials & Methods: IHOK was cultured three dimensionally with gingival fibroblast (GF), dermal fibroblast (DF) and immortalized gingival fibroblast (IGF). We characterized biologic properties of three dimensionally reconstructed IHOK by histological, immunohistochemical, and Western blot analysis. We also investigated whether MAP kinase pathway was involved in epithelial-mesenchymal interaction by Western blot analysis. Results: The best condition of three dimensionally cultured IHOK was the dermal equivalent consisting of type I collagen and IGF. IGF increased the expression of more proliferating cell nuclear antigen (PCNA), involucrin than GF and DF in response to co-culture with IHOK. Extracellularly regulated kinase (ERK) pathway was activated in organotypic co-culture with IGF. Conclusion: The organotypic co-culture of IHOK with dermal equivalent consisting of type I collagen and IGF resulted in excellent morphologic and immunohistochemical characteristics and involved ERK pathway. The epithelial-mesenchymal interaction was activated according to the fibroblast type.

• 한국양식학회지
• /
• 제10권1호
• /
• pp.33-37
• /
• 1997

미꾸라지를 대상으로 어류 유전자 이식을 위한 유용 model system으로 개발하기 위한 연구의 일환으로 잉어의$\beta$-actin 유전자의 promoter와 CAT 유전자가 융합되어 있는 외래 유전자 (pFV4CAT)를 미꾸라지에 이식, transgenic founder 미꾸라지를 생산하였다. PCR 분석결과, 이식된 외래 유전자는 부화 후 9개월된 성어에서 7.4-37.0%의 빈도로 존재하였으며 Southern blot 분석에 의해서 염색체 상의 삽입 가능성을 나타내었다. In situ immunohistochemical analysis 결과 이식된 외래 유전자는 미꾸라지 세포내에서 비교적 높은 빈도로 발현하였으며 그 발현 양상은 개체마다 다양하게 나타났다.

• 동의생리병리학회지
• /
• 제20권6호
• /
• pp.1604-1611
• /
• 2006

Ostreae concha is natural products of sea that haves good function for anti-stress. WE observed the effect of Otreae concha, Yukkwooltang and yukwool-tang add Ostreae concha for catecholamine, GOT, GPT, LDH and TG after immobilization stress, Ostreae concha depressed the stress response. In immunohistochemical analysis, The area of withe pulp of the spleen decreased in the control groups as compared with control ones. At same time, more severe histological changes of spleen such as the decreased diameter of periarterial lymphoid sheath and splenic node were demonstrated in the rats challenged with emotional stress. But these changes were slightly recovered in rats pretreated with Sample I, Sample II and Sample III. Immunohistochemical analysis showed that the expression of the inflammation-related protein tended to increase. But a decline of these expression, especially TNF-${\alpha}$ by pretreated with Sample I, were observed in the red pulp of spleen of the experimental rats. These results suggest that ostreae concha may act as a therapeutic agent for stress disease through a regulation of stress-related hormones.

• Journal of Korean Neurosurgical Society
• /
• 제42권2호
• /
• pp.118-124
• /
• 2007

Objective : Adipose tissue is derived from the embryonic mesoderm and contains a heterogenous stromal cell population. Authors have tried to verify the characteristics of stem cell of adipose derived stromal cells (ADSCs) and to investigate immunohistochemical findings after transplantation of ADSC into rat brain to evaluate survival, migration and differentiation of transplanted stromal cells. Methods : First ADSCs were isolated from human adipose tissue and induced adipose, osseous and neuronal differentiation under appropriate culture condition in vitro and examined phenotypes profile of human ADSCs in undifferentiated states using flow cytometry and immunohistochemical study. Human ADSCs were transplanted into the healthy rat brain to investigate survival, migration and differentiation after 4 weeks. Results : From human adipose tissue, adipose stem cells were harvested and subcultured for several times. The cultured ADSCs were differentiated into adipocytes, osteoctye and neuron-like cell under conditioned media. Flow cytometric analysis of undifferentiated ADSCs revealed that ADSCs were positive for CD29, CD44 and negative for CD34, CD45, CD117 and HLA-DR. Transplanted human ADSCs were found mainly in cortex adjacent to injection site and migrated from injection site at a distance of at least 1 mm along the cortex and corpus callosum. A few transplanted cells have differentiated into neuron and astrocyte. Conclusion : ADSCs were differentiated into multilineage cell lines through transdifferentiation. ADSCs were survived and migrated in xenograft without immunosuppression. Based on this data, ADSCs may be potential source of stem cells for many human disease including neurologic disorder.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권10호
• /
• pp.4275-4279
• /
• 2014

Background: The aim of this work is to assess the frequency of BRCA1 protein immunohistochemical (IHC) expression in epithelial ovarian cancer (EOC) and to evaluate the association of BRCA1 expression with clinical and pathological characteristics and the overall survival (OS) of patients treated with postoperative platinum-based chemotherapeutic agents. Materials and Methods: This retrospective study was conducted on 35 cases of epithelial ovarian cancer selected from the files of the Pathology Department, Faculty of Medicine, Mansoura University, Egypt. Immunohistochemistry (IHC) was performed for BRCA1 gene protein. BRCA1 expression was compared to patient's age, tumor histology, grade, stage and OS time. Statistical analysis was carried out with the SPSS version 16.0 to assess significant associations. Results: BRCA1 nuclear expression was detected in 40% of EOC, in which a mild increase in the percentage of positive cases was observed with serous histology, stage IV, and grade 3 carcinomas. There was a significant statistical difference in BRCA1 expression with regard to histological subtypes of EOC (p=0.048), but not grade or stage. Mean OS and survival rate were slightly better for BRCA1 expressing group, but there was no statistically significant difference (p=0.528). Conclusions: No association between BRCA1 immunohistochemical expression and tumor grade, stage or overall survival was noted in platinum-treated epithelial ovarian cancer patients.