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

The spleen is one of the largest organ in the reticuloendothelial system and plays an important role in theac-tivation of immune response. It is the organ most commonly injured after blunt abdominal trauma, and malig-nantlesions such as lymphoma, or these due to metastasis, occur not infrequently. Even so, it is ignored even inabdominal ultrasonography. Some benign splenic lesions, however can cause severe symptoms and result in high mortality, and their accurate diagnosis is therefore essential. This study describes the imaging findings andhistopathologic features of various nontraumatic benign splenic lesions.
Diagnosis ; Lymphoma ; Mononuclear Phagocyte System ; Mortality ; Neoplasm Metastasis ; Spleen ; Ultrasonography

This experiment was carried out to investigate the effects of depressor and stimulator of central nervous system on the reticuloendothelial phagocytic function in vivo. The phagocytic activity was assessed by means of carbon clearance method after intra-muscular adimnistration of phenobarbital(1mg/0.2 ml of normal saline/100 gm of body weight) and intravenous administ-ration of theophylline(1 mg/0.2 ml of normal saline/100 gm of body weight) into rats. The obtained results were as follows; 1. In the groups administrered with phenobarbital, the alteration in the phagocytic activity wi-thin three hours after administration was decreased compared with the normal and control gro-up, but thereafter, it was increased progressively to the normal level by 12 hours after administr-ation. 2. In the groups administered with theophylline, the alteration in the phagocytic activity within one hour after adminstration was increased compared with normal and control group, but after that decreased gradually to the normal level by 12 hours after injection. 3. From these results, it is concluded that stimulation of central nervous system may increa-se the phagocytic activity and depression of central nervous system may decrease the phagocy-tic activity of reticuloendothelial system.
Animals ; Carbon ; Central Nervous System ; Depression ; Mononuclear Phagocyte System* ; Phenobarbital* ; Rats* ; Theophylline*

PURPOSE: Plasma fibronectin is thought to have important role in the inflammatory response and host defense. We performed this study to evaluate concentration in the full-term, healthy preterm, asphyxia and respiratory distress syndrome and how that correlated with gestational age and birth weight. METHODS: We evaluate 51 neonates who were delivered at Korea University Hospital from Jan. 1992 to Jul. 1992. In order to evaluate concentration of plasma fibronectin according to gestational age and birth weight in 51 neonates, we measured plasma fibronectin in healthy premature and term infants and investigated the alteration in plasma values in infants with perinatal asphyxia and respiratory distress syndrome. RESULTS: 1) The concentration of plasma fibronectin was lower in preterm infants(123+/-30ug/dl) than in term infants(151+/-26ug/dl). 2) There was a significant correlation between the plasma fibronectin concentration and both gestational age and weight (p<0.01). 3) The infant with perinatal asphyxia and respiratory distress syndrome had lower plasma fibronectin concentration than those in age matched healthy infant. CONCLUSIONS: This results shows that the plasma fibronectin correlate with gestational age and birth weight and suggests that deficiency of plasma fibronectin correlate with reticuloendothelial system hypofunction in infants with complicated birth.
Asphyxia ; Birth Weight ; Fibronectins* ; Gestational Age ; Humans ; Infant ; Infant, Newborn* ; Korea ; Mononuclear Phagocyte System ; Parturition ; Plasma*

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 (HLH) is named as hemophagocytic syndrome (HPS) and is a complicated disease with reactive hyperplasia of mononuclear/macrophagocytic system. This disease characterised by release of massive cytokines and severe functional destruction of visceral organs, which results from immune function disturbance causing by various pathogenic factors. The cardinal clinical symptoms of HLH are prolonged fever, hepatosplenomegaly, cytopenia, elevated ferritin and triglycerides, low fibrinogen, symptom in nerve system and so on. Nevertheless, impaired function of natural killer cells and cytotoxic T-cell is characteristic for HLH. HLH has of two different types that may be difficult to distinguish from one another: a primary and a secondary form. The combined immunochemotherapy of dexamethasone, etoposide and cyclosporin A and hematopoietic stem cell transplantation are considered as the effective therapies for HLH. In this article, the recent advance in research on the etiological factors, pathogenesis, clinical manifestations, laboratory examination, diagnosis as well as recommended therapy of HLH were reviewed.
Humans ; Lymphohistiocytosis, Hemophagocytic ; diagnosis ; etiology ; immunology ; pathology ; therapy ; Mononuclear Phagocyte System

Rheumatoid arthritis is a kind of collagen diease and involves many joints and extra-articular systems-heart, respiratory system, central nervous system, skin and reticuloendothelial system. The peripheral corneal ulcer is a rare chracteristic ocular finding in rheumatoid arthritis. Generally this ulcer is combined with minimal inflammation and vascularization. The local corticosteroid therapy is of no value and may be harmful. Collagenase inhibitor, hydrophylic contact lens. heparin therapy, limbal conjunctivectomy have been tried for treatment of this ulcer. The authors experienced a case of peripheral corneal ulcer in rheumatoid arthritis which responded to systemic corticosteroid therapy.
Arthritis, Rheumatoid* ; Central Nervous System ; Collagen ; Collagenases ; Corneal Ulcer* ; Heparin ; Inflammation ; Joints ; Mononuclear Phagocyte System ; Respiratory System ; Skin ; Ulcer

Histiocytosis is a relatively rare disorder of the reticuloendothelial system involving the proliferation of histicoytes, granulation tissue, and inflammatory cells in many different organ systems1). Thus, the three manifestations of the same basic pathologic process:Eosinophilic granuloma, Hand-Schuller-Christian disease, and Letterer-Siwe disease have been classified as localized, chronic disseminated and acute disseminated histiocytosis-X. They were therefore included under the term histiocytosis-X and this concept has been generally accepted. The authors have experienced one case of histiocytosis-X, a rare disease. A 11 month-old femal patient presented with gradually enlarged palpable mass on the occipital area. The occipital skull was defected in a punched out fashion. The mass was completely removed. The pathologic findings revealed Histiocytosis-X and the patient was given chemotherapy.
Drug Therapy ; Eosinophilic Granuloma ; Granulation Tissue ; Granuloma ; Histiocytosis ; Histiocytosis, Langerhans-Cell* ; Humans ; Infant ; Mononuclear Phagocyte System ; Rare Diseases ; Scalp* ; Skull

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: Chronic idiopathic thrombocytopenic purpura is an autoimmune disorder caused by sequestration of antibody-sensitized platelets in the reticuloendothelial system. However, uncertainty as to the specificity, frequency and clinical significance of such antibodies still remains. So, we tried to further clarify the above uncertainty in childhood chronic idiopathic thrombocytopenic purpura. METHODS: We analyzed sera from 29 patients. Twenty six patients were chronic ITP who were admitted or followed up to the Department of Pediatrics, Severance Hospital, Yonsei University Medical College from August 1996 to March 1997 by employing a modified antigen-capture ELISA(MACE), flow cytometry and electrophoresis(SDS-PAGE) and immuno-blotting(IB) assays. Three patients with ITP less than 6 months after onset of ITP were included to know the possibility to differrentiate between acute ITP and chronic ITP in this study. RESULTS: 1) Glycoprotein(GP)-specific antibodies were found in 28% (8/29) of patients, with 2 patients having antibodies directed solely to Gp II b/III a, no patients holding antibodies specific only for GPI b/I X and 6 possessing antibodies against both anti-GP I b/I X and Gp II b/III a antigen. 2) The detection rate of GP-specific antibodies of flow cytometry was about 10%. The positivity of anti-GPI b/I X antibodies by MACE and immunoblotting was 14% (4/29), respectively, the positivity of anti-Gp II b/III a antibodies by MACE and immunoblotting was, 21 % (6/29) respectively. The concordance rate between two assays(MACE and IB) was 79% (23/29). None of the three methods was good enough to stand alone. 3) Serum antibodies were not more frequently detected in active(p=1.0) or non-splenectomized(p=.54) chronic ITP patients. 4) No association was found between antibody specificity(anti-GPI b/I X, anti-Gp II b/ III a) and platelet counts(p : .87). CONCLUSION: We conclude that in korean childhood chronic ITP, antibodies against both anti-GPI b/I X and Gp II b/III a antigen were predominant antibody. But, the longterm follow-up in more cases is needed to further clarify the clinical significance of antral-platelet antibody in chronic ITP should be assessed.
Antibodies* ; Blood Platelets* ; Flow Cytometry ; Follow-Up Studies ; Humans ; Immunoblotting ; Mononuclear Phagocyte System ; Pediatrics ; Purpura, Thrombocytopenic, Idiopathic* ; Sensitivity and Specificity ; Uncertainty