The authors studied the ultrastructural changes of liver cell mitochondria in autolysis. The male Sprague-Dawley rats, weighting 140~160 gm were sacrificed for extract liver tissue. The slices of the liver tissue were incubated in 37 degrees C aseptic normal saline, and those were examined by following intervals; 10, 20 and 30 minutes and 1, 2, 6, 12 and 24 hours with light and electron microscope. The results obtained by light microscopy were summerized as follow. Several fine intracytoplasmic vacuoles were observed 1 hour after incubation. After 3 hours, focal destruction of cytoplasmic membrane with pyknosis of nuclei were observed. More delicate intracytoplasmic architectural changes could not be detected at light microscopic studies. The cord arrangement and cellular boundaries were relatively well preserved until 24 hours after incubation. Electronmicroscopically, mild intramitochondrial swelling with diminution of intramatrical granules were observed at 20 minutes. These were the earliest findings. Both high amplitude swelling and destruction of mitochondrial membrane were observed concurrently at 1 hour after incubation. The earlier membrane changes were observed at inner membrane with cristae and followed by degeneration of the outer membrane. The intramatrical amorphous dense deposits were observed at 30 minutes when the membranes were not destroyed. These deposits were noted in the other experimental groups which were incubated longer than 30 minutes. More electron dense deposits were observed after 1 hour at that time the membrane changes appeared. Vhe results suggest in this experiment that the earliest autolytic changes of liver cell mitochondria is loss of intramitochondrial granules and the membraneous changes led to the irreversible mitochondiral injury. The appearance of two types of intramitochondrial dense deposits would be an interesting finding needed to require further investigation for the chemical stucture and mechanism of dense deposit formation.
Male ; Humans

This study was carried out to investigate the morphological changes in the exocrine and endocrine glands of rat pancreas treated with endotoxin. Thirty-five male Sprague-Dawley rats, maintained on a stock diet, weight 200.0 gm. average. were divided into two experimental groups. Group 1. Control group. Five rats. Intraperitoneal infections of 0.3 ml normal saline only. Group 2. Endotoxin-treated group. Thirty rats. 7.6 mg of endotoxin per kg. of body weight was administered intraperitoneally. Each of 5 experimental animal was sacrificed 30 minutes, 1, 2, 4, 6 and 8 hours after endotoxin treatment, followed by examinations of histochemical, light and electron microscopy of both transmission and scanning modes. The results were as follows: A. Light microscopic findings: A mild interstitial edema and hyperemia were noted 1-hour after endotoxin treatment. Cytoplasmic vacuolization at 2-hour level(2-hours after endotoxin administration), diminished staining quality of both endocrine and exocrine cells at 6-hour level. B. Electron microscopic examination: a. Transmission electron microscopy. The acinar cells of pancreas showed a mildly increased pre-lysosome at 30-minute level. At 1-hour level, appearance of secondary lysosome was noted in addition to the findings of mitochondrial swelling and decreased cristae; disarray and vacuolization of the RER; vacuolar change of Golgi apparatus. At 6-hour level, post-lysosomes. The changes in the endocrine glands were similar to the findings of exocrine glands just described with time lag of 1 to 2 hours. The endothelial cells of capillaries show swelling and pinocytotic vesicle formation, protrusion of the cytoplasmic processes into the capillary lumen and increased heterochromatin at 1-hour level. These findings became more prominent as time lapses. The lumen of the endothelium tends to be narrowed, filled with fibrin and other blood cell components which later terminated with occasional complete occlusion by the formation of thrombi. b. Histochemical study: Primary lysosomes of the control group revealed a strong reaction of the acid phosphatase whereas the endotoxin treated group with less reactivity limited in the peripheral zones of the lysosomes. Secondary lysosomes with partial reactions. However, the pre-lysosomes and post-lysosomes failed to demonstrate any acid phosphatase activity at all. c. Scanning electron microscopy. The endothelial cells of the capillaries, arterioles and venules demonstrated increased microvillous activity, broad bled formation, cytoplasmic protrusion into the luminal spaces and microthrombi formation at 1-hour level. Six-hour level onward there noted a junctional disruption and partial detachment from the subendothelium of the wall. It can be concluded, therefore: When the endotoxin enters the blood stream, it elicits endothelial injury followed by both exudation with resultant edema of the surrounding tissue and concomitant vascular occlusions due to thrombosis. This vascular occlusion, in turn, causes ischemic degenerative change of the cells of exocrine and endocrine glands of the pancreas which are followed by digestions of degradational materials from the injured cells through the lysosomal phagocytic system. Besides the above pathogenetic pathway, one can not rule out the possibility of the direct effects of the endotoxin to the cells of exocrine and endocrine cells of the pancreas also so rendered.
Male ; Humans ; Rats ; Animals

The authors studied the formation of giant mitochondria in liver cell. The Sprague Dawley rats were sacrificed following intervals; 5, 10, 20, 30, and 60 minutes after intraperitoneal injection of hydrazine in the amount of 200 microliter/kg. And the extracted liver tissues were examined with light and electron microscopes. The results obtained were summarized as follow; Light microscopically, there is little difference between control and experimental groups. Electron microscopically, elongated, bizzare shaped mitochondria are appears 5 minutes after hydrazine injection. Those show attenuated portion, Y, U, or C shaped feature suggesting fusion or budding mitochondria. The number of giant mitochondria is decreased after 10 minutes group and rarely present in 60 minutes group. The results suggest in this experiment that the formation of giant mitochondria is kind of reversible change and it is different from the mitochondrial swelling of cellular injury. Intermitochondrial fusion and mitochondrial budding may be related with the formation of giant mitochondria.
Rats ; Animals

This study was performed to investigate the effect of endotoxin to the CCl4-induced liver injury. Twelve Sprague-Dawley rats were intraperitoneally injected 1.6 g/kg CCl4 as control group. Another 24 rats were orally administrated 300 mg/kg of neomycin at 16 and 3 hours prior to CCl4 injection as experimental group. Twelve among them were intraperitoneally infected 1.0 mg/kg of endotoxin(E-Coli, 0111:B4, No L-2630, lipopolysaccharide, Sigma, USA) and CCl4 simultaneously for offsetting neomycin effect. The rats were sacrificed at 1, 4, 10, and 24 hours after CCl4 injection. The liver tissues from all experimental groups were observed by light and electron microscopy. The results obtained were summarized as follows: In the CCl4 only group, the hepatocytes revealed sweling of ER and mitochondria with many lipid droplet in the cytoplasm. Focal cellular necrosis was seen at the later phase. The Kupffer cells were activated and showed many cytoplasmic processes, secondary lysosomes, and vaculoles. The endothelial cells were edematous. Several neutrophils, platelets, and microthrombi were scattered in the sinusoid. In the neomycin-CCl4-endotoxin administrated group, both hepatocytic destruction and intrasinusoidal microthrombi formation were more pronounced. In the neomycin pretreated group, the hepatocytes revealed mild cellular destruction without necrosis. There is no intrasinusoidal microthrombi. According to these results, it would be concluded that the small dosage of gastrointestinal tract-derived endotoxin affects to the liver injury caused by CCl4. The synergistic effects of CCl4 and gastrointestinal tract-derived endotoxin which can not be detoxified by damaged Kupffer cells, may be more important in the pathogenesis of CCl4-induced liver injury.
Rats ; Animals

Local anesthesia for arthroscopic procedure of the knee is an increasinglv popular technique that avoids the use of general anesthesia and the associated risks of respiratory depression, aspiration, and postoperative sedation. Many authors, for example McGinty etc., Martin, Yoshiya etc., advocated local anesthesia as safe and efficient method for arthroscopic procedures of the knee. We performed arthoroscopy of the knee under local anesthesia on 150 patients for diagnostic and operative purposes between January l993 and December l996. The technique of local anesthesia that we used was that 20cc of 0.5%; bupivacaine with I:200,000 epinephrine was injected into superolateral portal of the knee joint and additional 10-20cc ot 1% lidocaine into the arthroscopic portals. Pnevmatic tourniquet wa, not applied in all cases. We analysed the 150 cases and the results were as follows; The diagnostic arthroscopy was performed in 50 cases and the operative arthroscopy was in 100 cases. The duration ot local anethesia was from 4 hours to 12 hours, with an average of 6 hours. In 35 cases arthroscopy was performed as outpatient procedure and average hospital stay excluding other problem was 5 days. No complication related to systemic toxicity by local anesthetics was observed. Conclusively arthroscopy of the knee under local anesthesia is safe and effective procedure to avoid the risks of general anesthesia but patients selection is very important.
Anesthesia, General ; Anesthesia, Local* ; Anesthetics, Local ; Arthroscopy* ; Bupivacaine ; Epinephrine ; Humans ; Knee Joint ; Knee* ; Length of Stay ; Lidocaine ; Outpatients ; Respiratory Insufficiency ; Tourniquets

PURPOSE: The purpose of our study is to evaluate the diagnostic significance of clinical findings, WBC count, ESR, CRP, simple X-ray, ultrasonography and bone sanning in neonates. MATERIALS AND METHODS: From January 1995 to May 1998, we have experienced 14 cases of pyogenic osteomyelitis and pyogenic arthritis in neonates. The mean age of patients was 16.7 days and the involved sites were 6 cases of pyogenic arhtritis of hip, 5 cases of pyogenic arthritis of hip with proximal femur osteomyelitis, 2 cases of pyogenic arthritis of shoulder with proximal humerus osteomyelitis and 1 case of proximal tibia osteomyelitis. RESULTS: The most frequent clinical signs were local swelling and pseudoparalysis of involved extremity. Laboratory findings showed that elevated ESR was in 11/14 (79%), positive CRP in 6/8 (75%), leukocytosis in 6/14 cases (43%). Abnomal findings in simple X-ray was in 7/13 (54%), positive bone scanning findings in 3/8 (37.5%), positive ultrasonographic findings in 11/11 cases (100%). CONCLUSIONS: ITherefore we concluded that careful physical examination and ultrasonography were important for early diagnosis of bone or joint infection in neonates
Arthritis ; Diagnosis* ; Early Diagnosis ; Extremities ; Femur ; Hip ; Humans ; Humerus ; Infant, Newborn* ; Joints* ; Leukocytosis ; Osteomyelitis ; Physical Examination ; Shoulder ; Tibia ; Ultrasonography

PURPOSE: Matrix metalloproteinases (MMPs) have been reported to play critical roles in the endothelial cell migration and matrix remodeling during angiogenic process. To investigate the roles of the membrane type MMP (MT1-MMP) by the matrix remodeling of endothelial cells, MT1-MMP expression vector was transfected into bovine aortic endothelial cells (BAECs). Increased ex+pression of MT1-MMP in BAECs enhanced the activation of MMP-2, invasion and migration of BAECs. Moreover, the capacity of tube formation was increased by MT1-MMP transfectants. These observations indicate that MT1-MMP is involved in the angiogenic process of endothelial cells in vitro. In this study, we attempted these effects were confirmed in vivo system. MATERIALS AND METHODS: In this study, we used MT1- MMP or Antisense MT1-MMP stable transfectants in HT1080 human fibrosarcoma cells. Chorioallantoic membrane (CAM) assay was used for the detection of angiogenesis in vivo and modified CAM assay for quantification of invasion of MT1-MMP transfected cells. RESULTS: In CAM assay, the formation of microvessels was stimulated by MT1-MMP transfectants. Invasive capacity of HT1080 cells was also increased in a novel in vivo metastasis model, PCR based CAM assay. CONCLUSION: These results identify the function of MT1- MMP during the neovascularization process.
Chorioallantoic Membrane* ; Endothelial Cells ; Fibrosarcoma ; Humans ; Matrix Metalloproteinase 1* ; Matrix Metalloproteinase 14 ; Matrix Metalloproteinases ; Membranes ; Microvessels ; Neoplasm Metastasis ; Polymerase Chain Reaction

OBJECTIVE: International institutes such as Global institute for Asthma(GINA), KAAACI(Republic of Korea), NHLBI(USA), BTS(UK) and JSA(Japan) have published guidelines for asthma treatment. The aim of this study was to compare the representatives' international guidelines of pharmacotherapy for pediatric asthma. METHODS: The recommendations related to pharmacotherapy for pediatric asthma were extracted from the latest representatives' international guidelines, and comprehensive comparisons were conducted. RESULTS: Major comparison outcomes between international guidelines were evaluated as follows: classification system on severity and pediatric age group, recommendation for inhaled corticosteroid dose, recommendation for pediatric age group of theophylline in mild asthma, and recommendation for pediatric age group of tiotropium in severe asthma. Clinical trials emphasized the adverse effects of theophylline, whereas tiotropium demonstrated beneficial actions for pediatric asthma. Therefore, theophylline was recommended for older patients with persistent asthma, and tiotropium was considered to be suitable for younger patients with severe asthma according to GINA guidelines. CONCLUSION: These findings address the requirement to harmonize international guidelines of pharmacotherapy in pediatric asthma. In addition, the findings suggest that KAAACI needs to update its pharmacotherapy guidelines of theophylline, tiotropium and other medicines recently approved.
Academies and Institutes ; Asthma* ; Classification ; Drug Therapy* ; Humans ; Pediatrics ; Theophylline ; Tiotropium Bromide

Hypoplastic left heart syndrome is a rare congenital heart disease. This is a universally fatal leison, and approximately 80% of patients die within the first week of life. The diagnosis should be considered in infants, with the sudden onset of heart failure, systemic hypoperfusion and cyanosis. 2 cases of hypoplastic left syndrome are presented with review of related literatures.
Cyanosis ; Diagnosis ; Heart Defects, Congenital ; Heart Failure ; Humans ; Hypoplastic Left Heart Syndrome* ; Infant

BACKGROUND: The aim of this study was to evaluate the sensory and motor nerve block achieved by epidural anesthesia using 0.475% ropivacaine and 0.75% ropivacaine. METHODS: Fifty-six patients undergoing cesarean section were randomly allocated to group I (0.75% ropivacaine) or group II (0.475% ropivacaine). We assessed changes in sensory and motor block using the Bromage scale over 180 minutes after epidural anesthesia. The incidence of nausea, vomiting and the total dosage of ephedrine used were also recorded. Sensory changes, motor blockade and the total dosage of ephedrine used were compared using the t-test (P < 0.05). RESULTS: No significant differences were found between the two groups at the sensory block level except at 30 and 60 minutes after epidural anesthesia. However, the motor blockade of group I was significantly more intense than that of group II at 15, 20, 25, 30, 60, 120 and 180 minutes after epidural anesthesia. No significant differences were observed between the two groups in the incidences of nausea, vomiting or the total dosage of ephedrine used. CONCLUSIONS: The use of 0.475% ropivacaine instead of 0.75% ropivacaine in epidural anesthesia for cesarean section did not reduce the incidence of nausea, vomiting or the total dosage of ephedrine used. The sensory block achieved using 0.75% ropivacaine was similar, but the motor blockade achieved using 0.475% ropivacaine was less intense with a shorter duration and an earlier recovery to normal than that of 0.75% ropivacaine. These results suggest that 0.475% ropivacaine may be more useful in epidural anesthesia for cesarean section than 0.75% ropivacaine.
Anesthesia, Epidural* ; Cesarean Section* ; Ephedrine ; Female ; Humans ; Incidence ; Nausea ; Nerve Block* ; Pregnancy ; Vomiting