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H Kim

Publications and source records attributed to H Kim.

At least 1,081 records · Page 60Linked to original sources
PubMed1982

Effect of fatty acid modification of cultured hepatoma cells on susceptibility to natural killer cells.

Rat hepatoma (Morris 7777) cells modified with either oleic or linoleic acid exhibited greater susceptibility to normal spleen cell-mediated lysis in a 16-hr 51Cr release assay. At effector:target cell ratios of 300:1, the specific lysis of fatty acid-enriched target cells (cultured for 2 days in fatty acid-supplemented medium) by the normal rat spleen cells was 60% higher than the untreated target cells (P less than 0.01). Prolonging the culture in fatty acid-supplemented medium up to 6 days produced similar effects. Analysis of the fatty acid composition of cellular lipids revealed that an elevation of oleic or linoleic acid was the only significant alteration in the hepatoma cells grown in the oleic or linoleic acid-supplemented medium, respectively. The percentage of the acids was increased in the total cellular phospholipids, the choline, ethanolamine, serine, and inositol phosphoglyceride fractions, and the neutral lipids. In conclusion, we suggest that the elevation of oleic acid and linoleic acid contents in the membranes of the fatty acid-modified hepatoma cells may contribute to the increased susceptibility of these cells to natural killer cell-mediated cytotoxicity.

Animals↗
PubMed1981

Lymphoblastic lymphoma: a clinicopathologic study of 95 patients.

A retrospective clinicopathologic study of lymphoblastic lymphoma was based on 95 patients from the files of the Repository Center for Lymphoma Clinical Studies. All patients were treated according to different protocols of Cooperative Oncology groups sponsored by the National Cancer Institute. The patients ranged in age from 4 to 84 years, with a median of 30 years. Sixty-eight patients were male and 27 female, with respective median ages of 27 and 50 years. The male-to-female ratio was 2.5:1. Forty patients had mediastinal masses; 30 (75%) of whom were male. The median survival of all patients was 17 months (range 1-100 months). To ascertain the influence of various clinical and morphologic parameters of survival, univariate and multivariate statistical analyses were performed. Patients older than 30 years of age had significantly lower incidences of mediastinal involvement (P = 0.01), number of mitotic figures (P = 0.04), and development of leukemia (P = 0.02) than patients younger than 30. Whereas lymphoblastic lymphoma is generally considered to be a disease of children and young adults, this study indicates that lymphoblastic lymphoma occurs in all age groups. These findings further suggest that lymphoblastic lymphoma may have a different biologic behavior in older patients.

Adolescent↗
PubMed1981

Morphologic criteria for the differentiation of follicular lymphoma from florid reactive follicular hyperplasia: a study of 80 cases.

A study was made of 80 patients whose lymph nodes were characterized by the presence of follicles throughout the lymph node. The patients were divided into two groups on the basis of the clinical follow-up information. The first group consisted of 20 patients who were alive and disease-free at the end of five years without therapy. The patients in this group were classified as having florid reactive follicular hyperplasia (FRFH). The second group of 60 patients had progressive, recurrent, clinically active disease and were classified as having follicular lymphoma (FL). Forty-six were dead of active disease, and 14 were alive with disease. Various morphologic parameters were evaluated at low and high magnification, and statistical comparisons were made between FRFH and FL. Although several criteria were helpful in distinguishing FRFH from FL, the single most valuable criterion was the type of pattern encountered. Follicles of variable size and shape lying adjacent to each other throughout the lymph node without or with very little intervening tissue are diagnostic of FL. This pattern was evident in 85% of the FL cases, but was not observed in any of the cases of FRFH.

Adolescent↗
PubMed1981

Terminal deoxynucleotidyl transferase activity in neoplastic and nonneoplastic hematopoietic cells.

Terminal deoxynucleotidyl transferase activity was investigated by enzyme assay and (or) an indirect immunofluorescence method with specimens from 151 patients who had a variety of neoplastic and nonneoplastic conditions: leukemia, 62; non-Hodgkin's lymphoma, 36; Hodgkin's disease, seven; lymph nodes without neoplasms, 21; normal peripheral blood, 15; normal bone marrow, ten. Immunologic studies were done on samples from 82 of these patients. Increased terminal deoxynucleotidyl transferase activity was found by both methods in patients who had acute lymphoblastic leukemia and the lymphoid blast crisis of chronic myelocytic leukemia and by the immunofluorescence method in patients who had lymphoblastic lymphoma. A single patient with acute monoblastic leukemia was found by both technics to have increased enzyme activity. Three B-cell proliferations were positive by the enzyme assay; none was positive with the immunofluorescence method. In the remaining 42 B-cell proliferations, the levels of terminal deoxynucleotidyl transferase activity were found to be normal by both the enzyme assay and the immunofluorescence method. Cytoplasmic positivity was observed in as much as 10% of the cells in 13 specimens that were otherwise negative and in eight samples in association with nuclear positivity. A comparison of terminal deoxynucleotidyl transferase activity in microunits/mg protein (enzyme assay) with the percentage of positive cells (immunofluorescence method) yielded a correlation coefficient of 0.62 (P less than 0.01).

Adult↗
PubMed1980

So-called "Lennert's lymphoma": is it a clinicopathologic entity?

In order to investigate the natural history of so-called "Lennert's lymphoma" and to reevaluate whether non-Hodgkin's lymphoma with a high content of epithelioid histiocytes represents a clinicopathologic entity, we reviewed the histopathologic and clinical features of 60 patients in whom pretreatment diagnostic tissues had shown a diffuse and florid epithelioid histiocytic reaction identical to that originally described by Lennert and Mestdagh. Our study indicates that so-called "Lennert's lymphoma" is a heterogeneous group of disorders, which, in our series, included Hodgkin's disease (27 patients), non-Hodgkin's lymphoma (24 patients), angioimmunoblastic lymphadenopathy (1 patient), and atypical lymphoepithelioid cell proliferations of uncertain etiology and pathogenesis (8 patients). Most of the patients with Hodgkin's disease had Stage I or II disease without B symptoms, whereas patients with non-Hodgkin's lymphoma usually had Stage III or IV disease, commonly with B symptoms. The median survival was 79 months in the Hodgkin's disease group, compared with 12 months in patients with non-Hodgkin's lymphoma (P less than 0.0001). In patients with atpical lymphoepithelioid cell proliferations, the survival pattern was unpredictable, and the number of patients was too small for a meaningful statistical comparison. Progression to malignant lymphoma in 1 of the 8 patients with atypical lymphoepithelioid cell proliferations, however, underscores the malignant potential of this disorder. One patient with angioimmunoblast lymphadenopathy had generalized disease and constitutional symptoms. In Hodgkin's disease with a prominent epithelioid histiocytic reaction, the gross and microscopic features were similar to those observed in Hodgkin's disease in which this reaction was lacking. In non-Hodgkin's lymphoma, however both the macroscopic and microscopic features differed from those of the usual non-Hodgkin's lymphomas. Moreover, subdivision into poorly differentiated lymphocytic, mixed, and histiocytic types did not reveal any differences in median survival among these subtypes. Non-Hodgkin's lymphoma with a multifocal epithelioid histiocytic reaction previously included in the heterogeneous group called "Lennert's lymphoma" appears to be a distinct clinicopathologic entity.

Adolescent↗
PubMed1980

A method for the ultrastructural demonstration of non-specific esterase in human blood and lymphoid tissue.

Using the substrate 2-naphthylthiol acetate (NTA), we developed a reproducible method of demonstrating a non-specific esterase while retaining nuclear and cytoplasmic details at the ultrastructural level. The NTA esterase had a distribution and pattern of staining similar to those of esterases demonstrable at the light microscopic level by the alpha-naphthyl acetate or naphthol AS-D acetate esterase reaction. The NTA esterase appeared as intensely electron-dense granules of varying size and shape in the cytoplasm. The granules were most abundant in the cells of the histiomonocytic series. The large number of diffusely scattered granules in the cytoplasm of the histiocytes and monocytes made it possible to separate these cells from other haematopoietic elements. There was usually no direct relationship between the NTA esterase positivity and the amount or the location of lysosomes or mitochondria, although in some histiocytes the granules appeared to be associated with lysosomes. The NTA esterase-positive granules were usually more numerous than lysosomes and were located outside the lysosomal granules. Some of the lymphocytes outside the germinal centres and most of the lymphocytes in the blood showed a punctate positivity in the form of 1--4 electron-dense dots. Plasma cells were usually negative but, in rare cases, contained an occasional single dot-like reaction product similar to that in some of the lymphocytes. Granulocytes were always negative. The method described in this paper can be used effectively for identification and study of human haematopoietic cells lines at the ultrastructural level.

Carboxylic Ester Hydrolases↗
PubMed1980

High-pressure liquid chromatographic method for determination of rosaramicin in humans.

A high-pressure liquid chromatographic method has been developed for the quantitative determination of rosaramicin in serum. This procedure involves addition of an internal standard, adjustment to alkaline pH, treatment with potassium carbonate, ether extraction, and a reverse-phase column separation with acetonitrile-acetate buffer mixture as the mobile phase. This technique produces a good linear relationship between the peak height ratio and the rosaramicin concentration. In addition, this method has proven to be quite specific for rosaramicin, since many of its derivatives tested do not interfere with the assay. The method is accurate and reproducible with a sensitivity of about 0.01 microgram of rosaramicin per ml of serum. It may be useful in monitoring drug levels in serum of patients and also for the pharmacokinetic studies of the drug in humans.

Chromatography, High Pressure Liquid↗
PubMed1980

Eosinophilic granuloma as an incidental finding in malignant lymphoma.

A histiocytic lesion that is histologically indistinguishable from eosinophilic granuloma was discovered as an incidental finding in lymph nodes from six patients with malignant lymphoma. Three patients had Hodgkin's disease and three had non-Hodgkin's lymphoma. The occurrence of epitheloid histocytes or granulomatous reactions, or both, in lymphoid tissue is well known in malignant lymphomas, but the combination of eosinophillic granuloma and malignant lymphoma in the same lymph node has not been described previously. In all of our cases, the malignant lymphoma was more conspicuous than the histiocytic lesion, and the latter was limited to the sinuses. Both lesions were well delineated; features suggesting transition of one into the other were absent, even in sites where the two were juxtaposed. No extranodal eosinophilic granuloma was observed.

Adult↗