Ultraviolet radiation of skin leads to a systemic alteratior tkat inhibits the normal pattern of immunologic tumor rejection., suppresses the contact hypersemisivity and transiently alters the morphology and the surface marker characteristics of Langerhans cells. Moreover, Ultraviolet radiation elaborates the ETAF, neuropeptides, proteins, and urocaicacid which may alter immunologic responses. But no other study about the effects of UVB irradiation on the systemic immunologic functions of the macrophages of internal organs was reported. The macrophages of the reticuloendothelial system (RES) play a central role in cell-mediated immunity, because they are involved both in the initiation of responses as antigen-presenting, cells, and in the effector phase as inflammatory, tumoricidal and microbicidal cells. The present study was intended to investigate the effects of UVB irradiation on the immunologic functions of mouse peritoneal macrophages. Normal 6-8-week-old BALB/c mice were exposed at the dose rate of 20mJ/cm and 40mJ/cm of UVB per day, 5 days per weeks for 2 weeks, 4 weeks and 8 weeks. Then the peritoneal macrophages were obtained from the mice and the changes of cell count, chemotactic index, phagocytic index, NBT reduction rate and superoxide (0) production were examined. The results were as follows : 1)the number of mouse peritoneal macrophages was decreased by UVB radiation, 2) the chemotactic index of mouse peritoneal macrophage was not altered by UVB radiation, 3) phagocytic activity of mouse pertoneal macrophage was significsntly decreased by UBV radiation, 4) NBT reduction rate in mouse aeritoneal macrophage after UVB radiation was sinificanily decreased in all experimental group, and 5) Superoxide (0) production in mouse peritoneal macrophage after UVB radiation was decreased in all experimental groups.
Animals ; Cell Count ; Immunity, Cellular ; Langerhans Cells ; Macrophages ; Macrophages, Peritoneal* ; Mice* ; Mononuclear Phagocyte System ; Neuropeptides ; Skin ; Superoxides

BACKGROUND: The bone marrow biopsy sections of acute leukemia patients occasionally reveal a proliferation of large mononuclear cells that accompany the leukemic blasts, and this proliferation shows a starry sky pattern. We characterized these large mononuclear cells by performing immunohistochemistry with 12 different antibodies. The clinical characteristics were examined and then we determined their difference from hemophagocytic lymphohistiocytosis (HLH) and malignant histiocytic disorders. METHODS: Of the 200 acute leukemic bone marrow biopsy samples, 11 ALL and 10 AML cases showed large mononuclear cell proliferations. The panel of antibodies used for immunohistochemistry included those against the mononuclear phagocyte system, and immunohistochemistry was performed on the patients' initial specimens and the complete remission specimens. 10 normal specimens, 4 initial CML specimens and their complete hematologic response specimens were included as controls. RESULTS: The large mononuclear cells showed immunohistochemical results consistent with histiocytes. They were negative for the markers of dendritic cells the histiocytes and cytokines that are involved in the pathogenesis of HLH and vascular proliferation. Histiocyte proliferation was not observed in the complete remission specimens and in the initial and complete hematological response specimens of the CML patients and the normal bone marrow specimens. None of the cases fulfilled the criteria of HLH, and all 5 ALL cases, for which the immunophenotype results were available, showed a B cell phenotype. CONCLUSION: We characterized the large mononuclear cell proliferations as reactive histiocyte proliferations and we differentiated these from those of secondary HLH and malignant histiocytic disorders. A proportion of the large mononuclear cells showed negative results for all 12 antibodies and they showed characteristics that were suggestive of small fat cells. The pathophysiology and the prognostic effect of the reactive histiocyte proliferation accompanying acute leukemia require further study.
Adipocytes ; Antibodies ; Biopsy ; Bone Marrow ; Cytokines ; Dendritic Cells ; Histiocytes ; Histiocytic Disorders, Malignant ; Humans ; Immunohistochemistry ; Leukemia ; Lymphohistiocytosis, Hemophagocytic ; Mononuclear Phagocyte System ; Phenotype

Recent studies suggested that platelet activation with surface expression of P-selectin may be related to a loss of viability and early clearing from circulation by monocytes and macrophages of the reticuloendothelial system. We have studied platelet activation during hemodialysis with a cuprophane membrane in eighteen patients with uremia. Blood samples were obtained at the begining of the hemodialysis(sample I) and after 1 hr of hemodialysis (sample II), and at the end of hemodialysis from the venous line (sample III). Platelet surface expression of P-selectin(CD62) was determined by flow cytometry. Percentage of positive platelets(% PP) of P- selectin was measured 43.9+/-15.6 % in sample I, 36.9+/-16.0% in sample II, and 40.1+/-13.1% in sample III. No statistical differences in P-selectin expression were observed in sample I, II, and III throughout the period of hemodialysis although platelet P-selectin expression after 1 hour of hemodialysis showed a slightly decrease(P=0.44). However, a significant increase in fluorescence occurred in samples from uremic patients(43.0+/-15.6%) with respect to low fluorescence was seen in normal control sera(14.6+/-11.2%). Our study shows that the substantial and irreversible platelet P-selectin expression might be contributing factors in early clearing of platelet from circulation in uremic patients.
Blood Platelets* ; Flow Cytometry ; Fluorescence ; Humans ; Kidney Failure, Chronic ; Macrophages ; Membranes ; Monocytes ; Mononuclear Phagocyte System ; P-Selectin* ; Platelet Activation* ; Renal Dialysis* ; Uremia

OBJECTIVE: Evidence has suggested that immune imbalance is involved with bipolar disorder (BD); however, its precise mechanism is poorly understood. This study investigated whether biochemical changes in the serum from BD patients could modulate the phenotype of cultured macrophages. METHODS: Eighteen subjects with BD and five healthy individuals were included in this study. The human monocyte cell line U-937 was activated with phorbol 12-myristate 13-acetate (PMA) and polarization was induced with RPMI-1640 media supplemented with 10% serum from each patient for 24 hours. Gene expression of selected M1 and M2 markers was assessed by quantitative PCR. RESULTS: Macrophages exposed to serum of manic and depressive BD patients displayed an increase of interleukin-1β (6.40±3.47 and 9.04±5.84 vs. 0.23±0.11; p < 0.05) and tumor necrosis factor-α (2.23±0.91 and 2.03±0.45 vs. 0.62±0.24; p=0.002 and p=0.004, respectively) compared to euthymic group (there was no difference between euthymic and controls). In parallel, U-937 macrophages treated with serum of patients in acute episode displayed a down-regulation of CXCL9 (0.29±0.20 vs. 1.86±1.61; p=0.006) and CXCL10 expression (0.36±0.15 and 0.86±0.24 vs. 1.83±0.88; p < 0.000 and p=0.04) compared to the euthymia group. CONCLUSION: Our results are consistent with previous studies showing that changes in peripheral blood markers could modulate M1/M2 polarization in BD. The evidence of macrophages as source of inflammatory cytokines might be helpful to unravel how the mononuclear phagocyte system is involved in the etiology of BD.
Bipolar Disorder ; Cell Line ; Chemokines ; Cytokines ; Depression ; Down-Regulation ; Gene Expression ; Humans ; Macrophages ; Monocytes ; Mononuclear Phagocyte System ; Necrosis ; Phenotype ; Polymerase Chain Reaction

Histiocytic medullary reticulosis was first described as a clinical and pathological entity by Scott and Robb-Smith in 1939. The clinical pictures include progressive pancytopenia, fever, wasting, lymphadenopathy, hepatosplenomegaly, jaundice and purpura. The outstanding morphological features of the disease is proliferation of histiocytes throughout the reticuloendothelial system with frequent leucoerythrophagocytosis. In spite of uniform clinical and fistologcal pictures verified by additional case reports, the diagnosis has usually not been made until postmortem examination. Most patients die within six months because the disease runs a rapidly fatal course. Since the orginal report, approximately 90 cases have been reported in the literatures. In this ciuntry, Ko and others reported several cases of HMR in adults, and there has been only one report in childhood. Recently, we had the opportunity to observe a 9 year old girl at this hospital whose clinical course and antemortem pathological features were consistent with criteria for the disease. In spite of the remission after treatment with various anticancer drugs, patient expired six months after diagnosis.
Adult ; Autopsy ; Child ; Diagnosis ; Female ; Fever ; Histiocytes ; Humans ; Jaundice ; Lymphatic Diseases ; Mononuclear Phagocyte System ; Pancytopenia ; Purpura

Hemophagocytic lymphohistiocytosis is a reactive disorder characterized by a generalized non-malignant histiocytic proliferation with prominent hemophagocytosis by stimulated histiocytes in the bone marrow and reticuloendothelial systems resulting in pancytopenia and liver dysfunction. Several diseases including infection, malignancy and autoimmune disease are known to be causative disorders. This case demonstrated histiocytic hemophagocytosis in the bone marrow, resulting in pancytopenia during treatment of systemic lupus erythematosus and did not show any underlying disease.
Adjustment Disorders ; Autoimmune Diseases ; Bone Marrow ; Child* ; Histiocytes ; Humans ; Liver Diseases ; Lupus Erythematosus, Systemic* ; Lymphohistiocytosis, Hemophagocytic* ; Mononuclear Phagocyte System ; Pancytopenia

Gaucher's disease (GD) is the most common inherited lysosomal storage disease, manifested by generalized accumulation of glucocerebroside in macrophages of the reticuloendothelial system due to a deficient lysosomal beta-glucocerebrosidase (GC). It is inherited by an autosomal recessive pattern in which three clinical phenotypes have been described based on the presence and severity of neurologic involvement. GD is treated possible by GC enzyme replacement therapy, allogeneic bone marrow transplantation (BMT), and gene therapy. We here report the exprience of successful allogeneic BMT in a 16-year-old female patient with GD type III which was demostrated markedly increased Gaucher cells in bone marrow and absence of GC activity in peripheral blood monocytes by FACS using 5'- pentafluorobenzoylaminofluorescein-di-beta-D-glucoside (PFBFDGlu) as substrate. Donor marrow engraftment was confirmed by chromosome analysis using microsatellite and by bone marrow examination. Assay of GC activity using FACS revealed normal level of enzyme activity. She remains alive and well after 12 months of BMT.
Adolescent ; Bone Marrow Examination ; Bone Marrow Transplantation* ; Bone Marrow* ; Enzyme Replacement Therapy ; Female ; Gaucher Disease* ; Genetic Therapy ; Glucosylceramidase ; Humans ; Lysosomal Storage Diseases ; Macrophages ; Microsatellite Repeats ; Monocytes ; Mononuclear Phagocyte System ; Phenotype ; Tissue Donors

Recently, we have experienced two cases of xanthogranuloma in adults presenting either a solitary papule or multiple papules. Laboratory findings including blood lipid substances such as cholesterol and triglyceride were within normal limits. In both cases, we could not find any other extracutaneous manifestations. Granulomatous infiltrates containing foam cells, foreign body giant cells and Touton giant cells as well as histiocytes and lymphocytes were revealed by histopathologic findings.
Adult* ; Cholesterol ; Foam Cells ; Giant Cells ; Giant Cells, Foreign-Body ; Histiocytes ; Humans ; Lymphocytes ; Triglycerides

No abstract available.
Animals ; Doxorubicin* ; Mononuclear Phagocyte System* ; Rats* ; Vincristine*

Sarcoidosis, a multisystemic granulomatous disorder of unknown causes, which presents with bilateral hilar adenopathy, pulmonary infiltration, and cutaneous, ocular, bones, and nervous and reticuloendothelial systems involvement, commonly involves young adults of both sexes. Herein, the case of a 70-year-old male, with progressive hoarseness of two weeks' duration and mild dyspnea, is reported. A fiberoptic bronchoscopy, performed to investigate the hoarseness, revealed paralysis of the left vocal cord, but with no other local abnormality. Two nodules, as pathologic findings, showed noncaseating epithelioid cell granulomas. We note a rare case of sarcoidosis, with vocal cord palsy, in Korea.
Aged ; Bronchoscopy ; Dyspnea ; Epithelioid Cells ; Granuloma ; Hoarseness ; Humans ; Korea ; Lymph Nodes* ; Male ; Mononuclear Phagocyte System ; Paralysis ; Sarcoidosis ; Vocal Cord Paralysis ; Vocal Cords ; Young Adult