Journal of Pathology and Translational Medicine

Original Articles

Evaluation of Protein Expression in Housekeeping Genes across Multiple Tissues in Rats: Hye Jeong Kim, Jong In Na, Byung Woo Min, Joo Young Na, Kyung Hwa Lee, Jae Hyuk Lee, Young Jik Lee, Hyung Seok Kim, Jong Tae Park; Korean J Pathol. 2014;48(3):193-200. Published online June 26, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.3.193

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Background

Housekeeping genes, which show constant protein expression patterns between different tissue types, are very important in molecular biological studies as an internal control for protein research.

Methods

The protein expression profiles of seven housekeeping genes (HPRT1, PPIA, GYS1, TBP, YWHAZ, GAPDH and ACTB) in various rat tissues (cerebrum, cerebellum, cardiac ventricle and atrium, psoas muscle, femoral muscle, liver, spleen, kidney, and aorta) were analyzed by Western blot and compared by coefficient of variation (CV).

Results

HPRT1 was stably expressed (CV≤10%) in six tissues (cerebrum, cerebellum, ventricle, femoral muscle, spleen, and kidney), PPIA was stably expressed in five tissues (cerebrum, cerebellum, ventricle, spleen and kidney), YWHAZ was stably expressed in three tissues (cerebrum, cerebellum, and kidney), and GAPDH was stably expressed in four tissues (cerebrum, ventricle, psoas muscle, and kidney). In comparison, GYS1, TBP, and ACTB were found to have CV values over 10% in all tissues. Of the seven genes examined, four (HPRT1, PPIA, YWHAZ, and GAPDH) were found to be stably expressed across multiple organs, with low CV values (≤10%).

Conclusions

These results will provide fundamental information regarding internal controls for protein expression studies and can be used for analysis of postmortem protein degradation patterns in forensic medicine.

Citations

Citations to this article as recorded by

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The Significance of Ventricular Volume in the Evaluation of Secondary Cardiomyopathy at Autopsy.: Joo Young Na, Byung Woo Min, Yeong Hui Kim, Seung Hyun Chung, Young Jik Lee, Hyung Seok Kim, Jong Tae Park; Korean J Pathol. 2011;45(4):336-347.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.4.336

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Abstract PDF: BACKGROUND
The weight, shape and consistency of the heart, and the thickness of the ventricular wall are used as parameters for evaluating postmortem heart and diagnosing cardiomyopathy at autopsy.
METHODS
The weight and volume of the ventricles and the thickness of the left ventricular wall of 58 hearts were measured and analyzed.
RESULTS
In the group of dilated hearts, the ventricular weight, ventricular volume, ventricular volume/ventricular weight, and left ventricular volume/right ventricular volume increased, whereas ventricular wall thickness decreased. In the group of hypertrophied hearts, the ventricular weight, ventricular volume, and thickness of the ventricular wall increased but ventricular volume/ventricular weight and left ventricular volume/right ventricular volume did not change significantly. In the group of undetermined hearts, it was later found that four of the cases should have been included in the dilated heart group and another two cases in the hypertrophied heart group.
CONCLUSIONS
In addition to conventional methods, the measuring ventricular volume is useful for evaluating a postmortem heart and may suggest postmortem differential diagnoses of dilated or hypertrophied forms of secondary cardiomyopathies.

Morphometric Study for Muscular and Microvascular Remodeling of Left Ventricular Free Wall and Interventricular Septum in Hypertrophic Cardiomyopathy.: Young Jik Lee, Hyung Suk Kim, Jong Tae Park, Chang Soo Park; Korean J Pathol. 1999;33(9):675-683.

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Abstract PDF: Hypertrophic cardiomyopathy (HCMP) is characterized myofiber hypertrophy and structural remodeling with changes in the proportion of the muscular, vascular, and interstitial compartments. A study was done to determine the structural remodeling patterns and the role of microvasculature of hearts in HCMP. Forty-two postmortem hearts were analyzed including 14 from patients who died of HCMP (group 1), 8 patients with HCMP but who died from extracardiac causes (group 2), 10 patients with ischemic heart disease (group 3), and 10 normal adult hearts (group 4). Macro- and microscopic examination, immunohistochemical study using CD34 antibody, and morphometric studies using image analyzer were performed. Mean cardiac weight and wall thickness were significantly higher in the HCMP group. Myocardial hypertrophy, and a variety of myocardial disarray and fibrosis involved the whole area of the left ventricles with HCMP. The percentage areas of microvessels were 6.40 0.7 in group 1, 5.90 0.6 in group 2, 4.98 0.3 in group 3, 4.85 0.4 in group 4, respectively, and the numbers of microvessels were 198.0 20.7 in group 1, 230.0 22.3 in group 2, 211.7 11.2 in group 3, and 236.4 11.4 in group 4, respectively (mean SE). The percentage area of microvessels was significantly higher in group 1 than in other groups. However, the number of microvessels in that group was lower than in the other groups, although it was statistically insignificant. Since flow-dependent vasodilation is preserved in HCMP, we considered flow-dependent vasodilation the cause of the discrepancy between the area and the number of microvessels. Ischemic changes observed in chronic HCMP and related heart failure were considesed to be due to the relative deficiency of the coronary flow compared to the increasing cardiac mass.

Correlation between Expression of c-erbB-2 Oncogene and Various Prognostic Factors in the Colorectal Carcinoma.: Wan Kim, Hong Ran Choi, Ji Shin Lee, Jong Tae Park, Chang Soo Park, Kyu Hyuk Cho; Korean J Pathol. 1993;27(3):217-225.

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Abstract PDF: The c-erbB-2 oncogene, which is a new human proto-oncogene similar to EGFR structurally, generates a glycoprotein of tyrosine kinase family with a molecular weight of 185,000 To evaluate the prognostic significance of c-erbB-2 oncogene expression in colorectal carcinoma, We analysed 73 colorectal carcinomas in paraffin sections immunohistochemically, using the monoclonal antibody specific for the c-erbB-2 oncogene product and correlated with clinicopathological data. The results were as follows 1) The immunoreactivity for c-erbB-2 oncogene was localized to cell membrane of the tumor cells and occasionally observed within the cytoplasm. 2) The positivity of c-erbB-2 oncogene expression was 71.2%(52/73) of the colorectal carcinomas overall. According to the histological types, the positivity of c-erbB-2 oncogene in adenocarcinoma(77.4%) was higher than that in mucinous carcinoma(36.4%)(p<0.05). 3) Expression of c-erbB-2 oncogene was significantly correlated with lymph node metastasis or distant metastasis(p=0.0117), Dukes stage(p=0.0432), and TNM classification(p=0.0102). These results suggest that c-erbB-2 oncogene expression may be used as a prognostic factor of colorectal carcinoma because of its correlation with other clinicopathological prognostic factors.

DNA ploidy and Cellular Proliferation Activity in Experimentally Induced Malignant Fibrous Histiocytoma.: Ji Shin Lee, Jong Tae Park, Sang Woo Juhng, Hong Ran Choi, Kyu Hyuk Cho; Korean J Pathol. 1993;27(3):205-216.

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Abstract PDF: To fine out the changes of DNA ploidy and cellular proliferation activity during carcinogenesis and evaluate correlation between flow cytometrically determined S-phase fraction and proportion of proliferation cell nuclear antigen(PCNA, PC10) immunoreactive cells, the authors studied on malignant fibrous histocytoma induced by intra-articular injection of 9, 10-dimethy1-1, 2-benzanthracene(DMBA) in the rats. Forty Wistar rats were used. The results obtained were as follows. 1) Firstly, tumors were palpated 5 weeks after the last injection of DMBA and formed in 27 rats at sacrificed. Histologically, these lesions showed storiform, indicative of malignant fibrous histiocytoma. 2) Three cases of DNA aneuploidy were observed at 4 and 5 months after the last injection of DBMA and one of them, which was DNA diploidy at main mass, was found at daughter mass. 3) Flow cytometrically determined S-phase fraction and proportion of PCNA(PC10) immunoreactive cells in malignant fibrous histiocytoma induced by DMBA were much higher than in control groups and slightly increased according to sequential changes after formation of mass. The comparison of flow cytometrically determined S-phase fraction and proportion of PCNA(PC10) immunoreactive cells showed significant correlation(r=0.6092, p<0.001). Above results strongly suggest that ploidy pattern may evolve into aneuploid type during the development of tumor and proliferation activity increases during the carcinogenesis.

Case Reports

Congenital Melanocytic Schwannoma in Ankle Joint Potentially Malignant: A case report.: Jong Tae Park, Chang Soo Park, Sang Woo Juhng, Kyu Hyuk Cho; Korean J Pathol. 1987;21(4):308-316.

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Abstract PDF: Congenital malignant melanocytic schwannoma in ankle joint was not reported on literature and it was a very interesting case. Light microscopically, melaninladen cells were mixed in abundant wavy spindle cells, some mitotic cells were also observed. Ultrastructurally, melanosomes in variable stages of development were scattered in the cytoplasm which had basal lamina. Collagen bundles were abundant in the intercellular connective tissue. It was histologically malignant tumor and clinically recurred. But in non-congenital potentially malignant melanocytic schwannoma which had been reported, reccurrence or distant metastasis were not noted. So, further clinical survey may be necessary for evaluation of the malignant behavior of this neoplasm.

Diffuse Neonatal Hemangiomatosis with Association of Massive Osteolysis and Arteriovenous Fistulae: An autopsy case.: Soon Pal Suh, Jong Tae Park, Wan Lee, Young Youn Choi, Chang Soo Park; Korean J Pathol. 1987;21(4):291-297.

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Abstract PDF: Diffuse neonatal hemangiomatosis is an uncommon disease that is characteristed by a diffuse nature of the lesions, and distinguished form a single or few, or superficial or deep, capillary, cavernous, or mixed hemangiomas occuring in early or adult life. We report an autopsy case of multiple hemangiomatosis, which is associated with massive osteolysis of right humerus and arteriovenous fistulae in surrounding soft tissues. The patient is a 23 day old female infant and had a 2.0x1.5 cm sized cystic destructive bony lesion which was located in the proximal shaft of right humerus. Right arm was hypertrophied, compared to the normal looking left. There were multiple hemangiomas in right humerus, lung, cutaneous skeletal muscles and nerves. This case shares clinical characteristics of Gorham's disease.

Original Article

Light and Electron Microscopical Studies on the Stroma of Hydatidiform Mole.: Jong Tae Park, Sang Woo Juhng, Kyu Hyuk Cho; Korean J Pathol. 1987;21(4):240-248.

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Abstract PDF: Many investigators were interested in the pathogenesis and the relationship between microscopical features and clinical behavior of hydatidiform mole. Trophoblastic cells in the trophoblastic disease were intensively examined histologically, ultrastructurally, immunohistochemically, and with hormone assay method, etc. But ultrastructural study on the stroma of hydatidiform mole was scarcely reported. In this paper, hydatidiform mole was examined at light and electron microscopic levels, with emphasis on the stroma. The results were as follows: 1) Hydropic degeneration of H-mole is more severe in the center of stroma and is not related with the degree of trophoblastic proliferation. Hofbauer cell and vascular structure are extremely rarely observed in the periphery of stroma which has relatively preserved cellular components. 2) Basement membrane is sometimes separated from trophoblastic layer. Degenerated cells in the stroma contain vacuoles, autophagosomes, and lipid droplets. Collagen is abundant in the loose interstitium. Hofbauer cells have no lysosome or phagosome. Vascular lumen is patient and endothelial cells are degenerated. From the above results, H-mole may be produced due to abnormal changes of trophoblasts and stromal changes may be a secondary process, so called autolysis. Hofbauer cells are not engaged in the stromal degeneration and may be different from usual tissue macrophages.

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