Use of a botulinum toxin A in dentistry and oral and maxillofacial surgery

Botulinum toxin (BT) was the first toxin to be used in the history of human medicine. Among the eight known serotypes of this toxin, those currently used in medicine are types A and B. This review article mainly discusses BT type A (BTA) because it is usually used in dentistry including dental anesthesiology and oral and maxillofacial surgery. BTA has been used mainly in the treatment of temporomandibular joint disorder (TMD) and hypertrophy and hyperactivity of the masticatory muscles, along with being a therapeutic option to relieve pain and help in functional recovery from dental and oral and maxillofacial surgery. However, it is currently used broadly for cosmetic purposes such as reducing facial wrinkles and asymmetry. Although the therapeutic effect of BTA is temporary and relatively safe, it is essential to have knowledge about related anatomy, as well as the systemic and local adverse effects of medications that are applied to the face.

Treatment and Rehabilitation of Repetitively Recurrent Langerhans Cell Histiocytosis: A Case Report

Langerhans cell histiocytosis (LCH) is characterized by proliferation of histiocyte-like cells (Langerhans cell histiocytes) with characteristic Birbeck granules, accompanied by other inflammatory cells. Treatments of LCH include surgery, chemotherapy, and radiotherapy. One of the representative forms of chemotherapy is intralesional injection of steroids. Surgical treatment in the form of simple excision, curettage, or even ostectomy can be performed depending on the extent of involvement. Radiotherapy is suggested in case of local recurrence, or a widespread lesion. This article shows the case of repetitively recurrent LCH of a 56-year-old man who had been through surgical excision and had to have marginal mandibulectomy and radiotherapy when the disease recurred. After the first recurrence occurred, lesions involved the extensive part of the mandible causing pathologic fracture, so partial mandibular bone resection was performed from the right molar area to the left molar area followed by the excision of the surrounding infected soft tissues. The resected mandibular bone was reconstructed with a segment of fibula osteomyocutaneous free flap and overdenture prosthesis supported by osseointegrated implants.

Elevated Plasma Pentraxin 3 and Its Association with Retinal Vein Occlusion

PURPOSE: To evaluate plasma pentraxin 3 (PTX3) in patients with retinal vein occlusion (RVO), and investigate the possibility of its role as a predictive biomarker. METHODS: Nested case-control study. The study included 57 patients with RVO and 45 age- and gender-matched subjects without RVO as controls. Plasma PTX3 and C-reactive protein concentration were measured in both groups a posteriori from frozen samples by using an enzyme-linked immunosorbent assay kit. RESULTS: The measured PTX3 value for the RVO group was 1,508 +/- 1,183 pg/mL (mean +/- standard deviation) and 833 +/- 422 pg/mL for the controls (p < 0.001). There was no significant difference in PTX3 levels between patients with central retinal vein occlusion and branched retinal vein occlusion (1,468 +/- 1,300 vs. 1,533 +/- 1,121 pg/mL; p = 0.818). CONCLUSIONS: Our data seems to support the role of chronic inflammation and ischemia in the development of RVO. It is possible that PTX3 can be used as a diagnostic biomarker of RVO.

The Usefulness of Fibrinogen-Thrombin Adhesives for Management of Conjunctival Closure in Scleral Buckling Operation

PURPOSE: We investigated the efficacy of fibrin glue for conjunctival closure in scleral buckling operations. METHODS: Thirty-seven eyes of 35 patients who underwent conjunctival closure for a scleral buckling operation with a minimum follow-up period of 3 months were evaluated. Postoperative discomfort (average score), presence of remnant adhesives, scleral buckle material infection, and wound dehiscence were evaluated prospectively in 35 eyes of 33 patients undergoing surgery with fibrin glue. RESULTS: The eyes showed decreasing conjunctival injection and hemorrhage over time and near to full recovered without any treatment after 1 month. With time, the average discomfort score decreased significantly (p < 0.05) and wound dehiscence was found in only 1 eye. There was no adhesive remnant in any of the eyes. CONCLUSIONS: The use of fibrin glue for conjunctival closure in scleral buckling operations is excellent as a cosmetic and functional method. The glue can reduce postoperative discomfort and is especially useful as a method to replace conventional conjunctival sutures.

Specific Protein Markers for Stem Cell Cross-Talk with Neighboring Cells in the Environment

A stem cell interacts with the neighboring cells in its environment. To maintain a living organism's metabolism, either cell-cell or cell-environment interactions may be significant. Usually, these cells communicate with each other through biological signaling by interactive behaviors of primary proteins or complementary chemicals. The signaling intermediates offer the stem cell's functionality on its metabolism. With the rapid advent of omics technologies, various specific markers by which stem cells cooperate with their surroundings have been discovered and established. In this article, we review several stem cell markers used to communicate with either cancer or immune cells in the human body.

Perception of Clinicians and Diabetic Patients on the Importance of Postprandial Glucose Control and Diabetes Education Status: A Cross Sectional Survey

BACKGROUND: Recent studies have shown the importance of postprandial glucose (PPG) in the development of diabetes complications. This study was conducted in order to survey the perceptions of clinicians and diabetic patients with respect to PPG management and the current status of diabetes education. METHODS: This was a cross-sectional study involving face-to-face interviews and an open questionnaire survey conducted in Korea. A total of 300 patients and 130 clinicians completed questionnaires, which included current education status, self monitoring of blood glucose (SMBG), criteria of diagnosis and management, and perceptions relating to PPG management. RESULTS: While there was a significantly higher perceived need for diabetes education, the sufficiency of the current education was considered to be severely lacking. Fasting plasma glucose (FPG), PPG, and glycosylated hemoglobin (HbA1c) were all important considerations for clinicians when making a diagnosis of diabetes, although PPG was considered less important than FPG or HbA1c in the treatment of diabetes. Most clinicians and patients were aware of the importance of PPG, but actual education on the importance of PPG was not actively being delivered. CONCLUSION: Our study showed that the current status of diabetes education is insufficient to meet the needs of the Korean population. A considerable gap was found to exist between awareness and what was actually taught in the current education program in regard to the importance of PPG. These results suggest that clinicians need to be more active in patient education, especially in regard to the importance of PPG.

Regulation of Glucose Control in People with Type 2 Diabetes: A Review and Consensus / 당뇨병

A conference was convened by the Korean Diabetes Association and the Korean Endocrine Society on September 7, 2009 to discuss and organize the results of research on intensive glucose control for the prevention of cardiovascular disease in patients with type 2 diabetes. Professor Kyung Soo Park led the conference, and Professors Kwang Won Kim and Ho Young Son acted as chairmen. Professors Doo Man Kim, Tae Sun Park, and Bong Soo Cha reported on intensive glucose control and diabetic complications, including the UK Prospective Diabetes Study (UKPDS), Diabetes Control and Complication Trial (DCCT) research results, the recently published Action to Control Cardiovascular Risk in Diabetes (ACCORD), Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE), and Veterans Affairs Diabetes Trial (VADT) research, as well as meta-analyses. Professor Jeong-Taek Woo reported on the manuscript written by the committee for the Korean Diabetes Association which dealt with the treatment of diabetes mellitus. Professors Kyung Soo Ko, Joong Yeol Park, Hyun Shik Son, Moon-Kyu Lee, Dong-Won Byun, and Yoon-Sok Chung participated in the discussion and collected information for the manuscript from all of the participants. The aim of the debate was to determine how to establish target goals for intensive glucose control and how to individualize those goals. The participants concluded that there was no need to modify the recommendation of maintaining an HbA1c under 6.5%, the current blood glucose treatment goal that is recommended by the Korean Diabetes Association. In addition, individual target goals for glucose control were recommended depending on the situation of each patient. We report on the consensus statement from the meeting.

Regulation of Glucose Control in People with Type 2 Diabetes: A Review and Consensus / 당뇨병

A conference was convened by the Korean Diabetes Association and the Korean Endocrine Society on September 7, 2009 to discuss and organize the results of research on intensive glucose control for the prevention of cardiovascular disease in patients with type 2 diabetes. Professor Kyung Soo Park led the conference, and Professors Kwang Won Kim and Ho Young Son acted as chairmen. Professors Doo Man Kim, Tae Sun Park, and Bong Soo Cha reported on intensive glucose control and diabetic complications, including the UK Prospective Diabetes Study (UKPDS), Diabetes Control and Complication Trial (DCCT) research results, the recently published Action to Control Cardiovascular Risk in Diabetes (ACCORD), Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE), and Veterans Affairs Diabetes Trial (VADT) research, as well as meta-analyses. Professor Jeong-Taek Woo reported on the manuscript written by the committee for the Korean Diabetes Association which dealt with the treatment of diabetes mellitus. Professors Kyung Soo Ko, Joong Yeol Park, Hyun Shik Son, Moon-Kyu Lee, Dong-Won Byun, and Yoon-Sok Chung participated in the discussion and collected information for the manuscript from all of the participants. The aim of the debate was to determine how to establish target goals for intensive glucose control and how to individualize those goals. The participants concluded that there was no need to modify the recommendation of maintaining an HbA1c under 6.5%, the current blood glucose treatment goal that is recommended by the Korean Diabetes Association. In addition, individual target goals for glucose control were recommended depending on the situation of each patient. We report on the consensus statement from the meeting.

Delta Prostate Specific Antigen (PSA) Helps to Predict Prostate Cancer in Men with Serum PSA Level above 4 ng/ml / 대한남성과학회지

PURPOSE: Prostate biopsies have typically been performed on all patients with prostate specific antigen (PSA) levels above 4 ng/ml, however, the cancer detection rate is low. We would like to predict cancerous conditions of the prostate by developing a new PSA formula. MATERIALS AND METHODS: Between July 2004 and July 2006, 93 patients with serum PSA levels above 4 ng/ml received extended prostate biopsies. The medical records of all patients - age, total/free PSA after/before prostate massage, final diagnoses of prostate biopsies - were reviewed retrospectively. We developed a new formula to calculate the delta PSA: (total/free PSA after prostate massage - total/free PSA before prostate massage) / total/free PSA before prostate massage. RESULTS: The patients were divided into two groups, the prostate cancer group (39 patients) and the benign disease group (54 patients). Mean total/free PSA for the benign disease group were 9.35/1.49 ng/ml (before) and 16.66/5.06 ng/ml (after), while values for the data of prostate cancer group were 21.02/2.43 ng/ml (before) and 24.61/4.40 ng/ml (after). The positive predictive value of the patients with PSA levels between 4 and 10 ng/ml was 32%; the positive predictive value of the patients with PSA levels above 10 ng/ml was 75%. The mean delta total/free PSA values for the benign disease and prostate cancer groups were 0.92/2.42 and 0.28/1.14, respectively. The cut off value of delta total/free PSA was below 0.5/2.0. Sensitivity, specificity, and positive predictive values for delta total PSA were 90% (95% confidence interval (CI), 80.2~99.3), 54% (95% CI, 41.4~67.7) and 58% (95% CI, 45.9~70.8), respectively. Sensitivity, specificity, and positive predictive values based on delta free PSA were 87% (95% CI, 76.7~97.7), 48% (95% CI, 36.7~63.3), and 56% (95% CI, 43.3~68.2), respectively. CONCLUSIONS: We suggest that the use of delta total/free PSA in patients with serum PSA levels above 4 ng/ml may be helpful, not only to better detect prostate cancer, but also to reduce unnecessary prostate biopsies.

Development and Clinical Implication of Post- transplant Diabetes Mellitus / 대한이식학회지

PURPOSE: It has been known that the incidence of post-transplant diabetes mellitus (PTDM) is variable according to the immunosuppressant used. The goals of this study are to uncover the factors associated with the development of PTDM and to clarify the fate of PTDM. METHODS: The medical records of 267 patients who underwent renal transplant between 1996 and December 2002 at Seoul National University Hospital were retrospectively reviewed. Patients were divided into three groups: cyclosporine group (CsA, n=179), high tacrolimus group (HFK, mean trough level during post-transplant 2 week>15 ng/m, n=33) and low tacrolimus group (LFK, mean trough level during post- transplant 2 week40year), family history of diabetes and obesity (BMI>25) were the risk factors for PTDM development. Incidences of associated clinical events, such as acute rejection, cerebrovascular accident, myocardial infarction, or infection were not different between PTDM and non-PTDM group. PTDM was resolved in 13 out of 46 patients (28.3%). Only 7 out of 33 patients (21.2%) in whom PTDM persisted lost their graft. CONCLUSION: PTDM incidence was higher in HFK group. So, LFK protocol is considered to be safe and beneficial, at least in terms of PTDM. Tacrolimus as immunosuppressant, recipient, family history of DM and obesity were the risk factors of PTDM development. PTDM was reversible in 28.3% of patients. PTDM had little impact on clinical outcomes during mid-term period.

Cancer Screening Rates and its Related Factors in a Rural and Urban Communities

BACKGROUND: This study was aimed at preparing basic data required for establishment of a cancer screening program by evaluating the screening rate and related factors in rural and urban areas. METHODS: The study population of 2,157 respondents was selected by a random cluster sampling method in one rural area (Gun) and one urban area (Gu). The subjects answered the structured questionnaire. The Andersen model was used to evaluate the related factors. RESULTS: The results by proportions of the study population who had received cancer screening tests in the last three years were 8.9% for stomach cancer, 10.5% for hepatic cancer, 4.5% for colorectal cancer, 46.3% for cervical cancer and 16.0% for breast cancer. Application of Andersen model revealed that sex, age, education level, economic status, knowledge and alcohol drinking for stomach cancer; sex age, knowledge alcohol drinking, and smoking for liver cancer; sex, age, education level, marital satus, knowledge, alcohol drinking, and smoking for colorectal cancer; age, eucational level, marital status, area, economic status and attitude for cervical cancer; age, area, attitude and family history for breast cancer were significant. CONCLUSION: These results could be used to develop a program that facilitates change of community people's knowledge and attitude and practice of health behavior.

Nonlinear Mixed Effect Modeling of Population Pharmacokinetics and Pharmacodynamics of Etomidate / 대한마취과학회지

BACKGROUND: Etomidate is used as a fast-acting hypnotic with few cardiovascular effects to induce anesthesia in patients with a poor cardiovascular reserve. The bispectral index (BIS) has been suggested to be a measure of the depth of anesthesia and correlates well with the level of consciousness. This study examined the population pharmacokinetics and pharmacodynamics of etomidate using nonlinear mixed effect (NONMEM) modeling and sigmoid Emax modeling. METHODS: Eighteen middle aged adults, with ASA physical status I or II, who were scheduled for elective surgery, were included. 0.2% etomidate was administerd at 150 ml/h until the patients lost consciousness. The patient recovered spontaneously until they regained consciousness, as determined by a verbal response. The BIS was determined and arterial blood samples were collected. The plasma concentrations were measured with high performance liquid chromatograhy (HPLC). NONMEM was used for population pharmacokinetic and sigmoid Emax model for pharmacodynamic analysis. RESULTS: The induction dose for the loss of eyelid reflexes was 0.38 mg/kg. The induction time from drug infusion to the loss of eyelash reflexes was approximately 3.5 minutes. This study took approximately 8.5 minutes from the start of drug infusion to the recovery of consciousness. The pharmacokinetic parameters were t(1/2alpha) = 1.1 min, t(1/2beta) = 1.9 min, t(1/2gamma) = 106.5 min, k(21) = 0.36 L/min, k(31) = 0.009 L/min, V(1) = 6.43 L, V(area) = 426 L, C(l) = 2.77 L/min. The pharmacodynamics were keo = 0.40 L/min, CE(50) = 1.0 microgram/mL, E(0) = 94, E(max) = 94 and gamma = 1.2. The performance error for the etomidate concentration was 0.14+/-0.99 (typical prediction) and -0.03+/-0.40 (individual prediction) and -0.09+/-1.00 and -0.001+/-0.13 for the BIS score. CONCLUSIONS: When compared with other previously published data, our pharmacokinetic parameters demonstrated a shorter half lives, a larger volume of distribution, and an increased clearance with significant interindividual differences. The pharmacodynamics showed a large interindividual variability. The reason for discrepancy might be the relatively short sampling time. However, further study will be warranted to improve the model performance in the future.

Nonlinear Mixed Effect Modeling of Population Pharmacokinetics and Pharmacodynamics of Etomidate / 대한마취과학회지

BACKGROUND: Etomidate is used as a fast-acting hypnotic with few cardiovascular effects to induce anesthesia in patients with a poor cardiovascular reserve. The bispectral index (BIS) has been suggested to be a measure of the depth of anesthesia and correlates well with the level of consciousness. This study examined the population pharmacokinetics and pharmacodynamics of etomidate using nonlinear mixed effect (NONMEM) modeling and sigmoid Emax modeling. METHODS: Eighteen middle aged adults, with ASA physical status I or II, who were scheduled for elective surgery, were included. 0.2% etomidate was administerd at 150 ml/h until the patients lost consciousness. The patient recovered spontaneously until they regained consciousness, as determined by a verbal response. The BIS was determined and arterial blood samples were collected. The plasma concentrations were measured with high performance liquid chromatograhy (HPLC). NONMEM was used for population pharmacokinetic and sigmoid Emax model for pharmacodynamic analysis. RESULTS: The induction dose for the loss of eyelid reflexes was 0.38 mg/kg. The induction time from drug infusion to the loss of eyelash reflexes was approximately 3.5 minutes. This study took approximately 8.5 minutes from the start of drug infusion to the recovery of consciousness. The pharmacokinetic parameters were t(1/2alpha) = 1.1 min, t(1/2beta) = 1.9 min, t(1/2gamma) = 106.5 min, k(21) = 0.36 L/min, k(31) = 0.009 L/min, V(1) = 6.43 L, V(area) = 426 L, C(l) = 2.77 L/min. The pharmacodynamics were keo = 0.40 L/min, CE(50) = 1.0 microgram/mL, E(0) = 94, E(max) = 94 and gamma = 1.2. The performance error for the etomidate concentration was 0.14+/-0.99 (typical prediction) and -0.03+/-0.40 (individual prediction) and -0.09+/-1.00 and -0.001+/-0.13 for the BIS score. CONCLUSIONS: When compared with other previously published data, our pharmacokinetic parameters demonstrated a shorter half lives, a larger volume of distribution, and an increased clearance with significant interindividual differences. The pharmacodynamics showed a large interindividual variability. The reason for discrepancy might be the relatively short sampling time. However, further study will be warranted to improve the model performance in the future.

Multi-country Study on the Prevalence and Clinical Features of Peripheral Arterial Disease in Type 2 Diabetic Patients Who are at High Risk for Atherosclerosis / 대한내분비학회지

BACKGROUND: PAD-SEARCH (Peripheral Arterial Disease-Screening and Evaluation of diabetic patients in Asian Regions Characterized by High risk factors) is the first international study to investigate the prevalence of peripheral arterial disease (PAD) in Asian type 2 diabetic patients and to demonstrate the relationships between the putative risk factors and PAD in this population. METHODS: A total of 6,625 type 2 diabetic patients (2,873 males and 3,752 females aged 50 and older) were enrolled in PAD-SEARCH in Korea, China, Taiwan, Hong Kong, Indonesia, Thailand and Philippines from October 2003 to March 2004. The Fukuda vascular profile VS-1000(TM) was used to determine the ankle-brachial index (ABI) and the brachial-ankle pulse wave velocity (baPWV). RESULTS: The mean patient age was 63.7 +/- 8.2 years and the mean duration of diabetes was 10.3 +/- 8.0 years. 1,172 (17.7%) subjects were diagnosed as PAD by the ABI (< or = 0.9). Subjects with PAD had a significantly longer duration of diabetes or hypertension, a higher HbA1c level and a significantly lower mean BMI than did the non-PAD subjects. In terms of the lipid profiles, triglyceride was the only significant variable. Notably, the mean ABI and baPWV in the females were significantly poorer than the age matched males for the in subjects with a normal ABI. However, the mean ABI and baPWV in males were significantly poorer than those of the age matched females for the subjects with PAD. On the multivariate analysis, gender, age, BMI, smoking status, duration of diabetes and a previous history of cerebrovascular disease were identified as the independent risk factors of PAD. CONCLUSION: These findings suggest that PAD is a common complication in Asian type 2 diabetic patients. Therefore, PAD screening and treatment should be emphasized for Asian diabetic patients with high risk factors.

Multi-country Study on the Prevalence and Clinical Features of Peripheral Arterial Disease in Type 2 Diabetic Patients Who are at High Risk for Atherosclerosis / 대한내분비학회지

BACKGROUND: PAD-SEARCH (Peripheral Arterial Disease-Screening and Evaluation of diabetic patients in Asian Regions Characterized by High risk factors) is the first international study to investigate the prevalence of peripheral arterial disease (PAD) in Asian type 2 diabetic patients and to demonstrate the relationships between the putative risk factors and PAD in this population. METHODS: A total of 6,625 type 2 diabetic patients (2,873 males and 3,752 females aged 50 and older) were enrolled in PAD-SEARCH in Korea, China, Taiwan, Hong Kong, Indonesia, Thailand and Philippines from October 2003 to March 2004. The Fukuda vascular profile VS-1000(TM) was used to determine the ankle-brachial index (ABI) and the brachial-ankle pulse wave velocity (baPWV). RESULTS: The mean patient age was 63.7 +/- 8.2 years and the mean duration of diabetes was 10.3 +/- 8.0 years. 1,172 (17.7%) subjects were diagnosed as PAD by the ABI (< or = 0.9). Subjects with PAD had a significantly longer duration of diabetes or hypertension, a higher HbA1c level and a significantly lower mean BMI than did the non-PAD subjects. In terms of the lipid profiles, triglyceride was the only significant variable. Notably, the mean ABI and baPWV in the females were significantly poorer than the age matched males for the in subjects with a normal ABI. However, the mean ABI and baPWV in males were significantly poorer than those of the age matched females for the subjects with PAD. On the multivariate analysis, gender, age, BMI, smoking status, duration of diabetes and a previous history of cerebrovascular disease were identified as the independent risk factors of PAD. CONCLUSION: These findings suggest that PAD is a common complication in Asian type 2 diabetic patients. Therefore, PAD screening and treatment should be emphasized for Asian diabetic patients with high risk factors.

Brain Magnetic Resonance Imaging in Children with CNS Manifestations / 대한소아신경학회지

PURPOSE: This study is to examine the relationship between clinical manifestations and MRI findings of children with CNS symptoms and signs. METHODS: A total of 447 inpatients with CNS symptoms and signs took brain MRI's at the Department of Pediatrics of Chungnam National University Hospital from July 2001 to June 2004. The results were retrospectively evaluated in terms of age, gender, chief complaints, and the findings of MRI and EEG based on the medical records. RESULTS: The overall incidence of abnormal MRI findings was 30.4%, of whom 44.7% were aged from one month to one year. The MRI findings were markedly different between under and over 6 years olds. In the former group, hydrocephalus, periventricular leukomalacia and hemorrhage were common while vascular malformation and brain tumor were more common in the latter group. Periventricular leukomalacia and hydrocephalus were shown to be the most frequent abnormal findings. 42.9% of those with seizures had abnormal MRI findings. Headache was common with 10.5% low incidence rate of abnormalies in MRI. The EEG findings were normal in 33.9% of the patients and there were not any articular correlations between EEG and MRI findings. CONCLUSION: MRI is important in the diagnosis of neurological disorders. However, caution should be taken in selecting patients since the MRI findings were normal in 69.6 % of the children with CNS symptoms and signs. This is the reason why more detailed standards of MRI for CNS manifestations are required.

Diagnostic Value of 24-hours Urinary Total Metanephrine As a Screening Test of Patients with Suspected Pheochromocytoma / 대한내분비학회지

BACKGROUND: A pheochromocytoma is a rare cause of secondary hypertension. Its diagnosis is important as the hypertension is usually curable by resection of the tumor, whereas the condition is potentially lethal if undetected. Biochemical confirmation of excessive catecholamine production is a prerequisite to a definitive diagnosis. Various studies from other countries have indicated that measuring of the urinary metanephrine, using a specific procedure, is the single most reliable screening test for all patients suspected of having a pheochromocytoma. However, the diagnostic value of urinary metanephrine has never been reported in Korea. We investigated the diagnostic value of 24-hours urinary metanephrine in patients with a suspected pheochromocytoma. METHODS: This was a retrospective evaluation study, which included 95 patients with sustained hypertension and paroxysmal symptoms, and 38 patients with asymptomatic adrenal incidentaloma at Seoul National University Hospital, between July 2000 and October 2002. We performed the 24- hour urinary total metanephrine test on all patients. The diagnosis of a pheochromocytoma was applied only when confirmed by pathological analysis of a resected specimen. The possibility of a pheochromocytoma was ruled out when all biochemical tests were normal, which were performed at least in duplicate, or there was no evidence of a mass in abdominal radiological studies or histological verification. We determined the upper reference limit for urinary metanephrine as 1.3mg/day and calculated the sensitivity and specificity of the 24-hour urinary metanephrine test. RESULTS: Seventeen patients were diagnosed with a pheochromocytoma. The total metanephrine measurement had sensitivities and specificities of 82.4 and 73.3% in all the patients, 90.9 and 66.7% in patients with hypertension and paroxysmal symptoms, and 66.7 and 90.6% in patients with adrenal incidentaloma, respectively. CONCLUSION: The urinary total metanephrine measurement had relatively lower sensitivities and specificities than in other countries(sensitivity: 83~100%, specificity: 80~98%). The sensitivity of urinary metanephrine was relatively high in patients with hypertension and paroxysmal symptoms, and the specificity was high in patients with an adrenal incidentaloma. We suggest that normetanephrine and metanephrine should be separately measured, and a reasonable upper reference limit be used. It may also be necessary to measure urinary metanephrine together with urinary catecholamine or VMA to improve the diagnostic value of the urinary metanephrine test.

IL-4 Induces CD4+CD25+ Regulatory T Cells from CD4+CD25- T Cells in Peripheral Blood / 대한류마티스학회지

OBJECTIVE: The CD4+CD25+ regulatory T cells (Treg) can be induced by TGFbeta and IL-10 in the periphery, and understanding the biological function of cytokine-induced Treg is critically important for the control of autoimmune diseases. We investigated the IL-4-induced CD4+CD25+ regulatory T cells in human PBMCs, which were derived from the CD4+CD25- T cells. METHODS: The CD4+CD25- T cells from human PBMC were isolated by MACS and cultured in the presence of IL-4 or absence of IL-4. The presence and phenotype of induced CD4+CD25+ T cells were determined by flow cytometry. Supressive activity of induced CD4+CD25+ T cells were assessed by culturing CD4+CD25- and CD4+CD25+ T cells with anti-CD3 monoclonal antibodies and antigen-presenting cells, followed by proliferation RESULTS: After 5 days, significant amount of CD4+CD25+ T cells were generated from the CD4+CD25- T cells cultured with anti-CD3 antibody in the presence of IL-4. These IL-4 induced CD4+CD25+ T cells presented with similar phenotype to natural occurred Treg cells, including CD45RO(hi), CD45RA(lo), CTLA-4(hi), OX40(hi), CD62L(hi) and HLA-DR(hi), and also exhibited high expression of Foxp3 molecule. In addition, the IL-4 induced CD4+CD25+ T cells can suppress the proliferative responses against anti-CD3. The regulatory property of IL-4 induced CD4+CD25+ T cell was partially abrogated after treatment with anti-IL-10 and anti-TGFbeta antibodies. CONCLUSION: These data indicate that IL-4 induced CD4+CD25+ Treg cells can be generated from the CD4+CD25- T cells in the peripheral blood, and may contribute to the important immunoregulatory function in human.

The Study of Clinical Characteristic Changes in Acute Poststreptococcal Glomerulonephtritis: Comparision of Clinical Manifestations between Recent 5 Years and Past 5 Years / 소아과

PURPOSE: The purpose of this study is to evaluate the clinical characteristic changes of acute poststeptococcal glomerulonephritis (APSGN) in recent. The cases of APSGN occurred for the last ten years were divided into group I and II by the unit of 5 years and clinical manifestations and laboratory findings of each groups were analyzed. METHODS: Total of 74 cases of APSGN, diagnosed at the department of Pediatrics, Chungnam National University Hospital from January 1995 to August 2004 were divided into group I (31 cases from January 1995 to December 1999) & II (43 cases from January 2000 to August 2004). In addition, the clinical records of each group were reviewed retrospectively and compared. RESULTS: In both groups, the prevalence rate was much higher in males than females, the seasonal prevalence rate was higher in winter, the upper respiratory infection was most frequent predisposing illness, and one to two weeks of latent period was the highest. However, the average age for group II were younger than group I. The prevalence rate of gross hematuria was higher in group II, but there was no significant difference between two groups. In the course of clinical symptoms, edema and hypertension were relieved within two weeks in both groups. In group II, the prevalence rate of proteinuria was higher, and the duration of proteinuria and gross hematuria were longer than group I. CONCLUSION: In this comparative study, the average age became younger. Clinically the duration of gross hematuria and proteinuria became longer, and the prevalence rate of proteinuria increased in recent 5 years. However, there was no difference between two groups in clinical courses and prognosis.

Reciprocal Activation of Fibroblast-like Synoviocyte and Type II Collagen-reactive T cell in Rheumatoid Arthritis / 대한류마티스학회지

OBJECTIVE: To investigate the interaction between type II collagen (CII)-reactive T cell and fibroblast-like synoviocyte in rheumatoid arthritis (RA). METHODS: Peripheral blood T cells from RA patients were cultured with bovine CII and analyzed by flow cytometry. After co-culture with CII-reactive T cells and fibroblast-like synoviocytes (FLS), the expression of cytokines (IL-15 and TNF-alpha from FLS, IFN-gamma and IL-17 from CII-reactive T cells) were determined by ELISA and RT-PCR. RESULTS: CII-reactive T cells expressed CD69, one of the early activation markers, and produced significant amount of IFN-gamma, and proliferated. IL-15 and TNF-alpha expression from FLS were significantly elevated when co-culture with CII-reactive T cells and inhibited by physical interruption of cell-to-cell contact or anti-CD40 antibody. IFN-gamma and IL-17 expression from CII-reactive T cells were also significantly elevated when co-culture with FLS and inhibited by anti-IL-15 monoclonal antibody. CONCLUSIONS: CII-reactive T cells can activate FLS to secret proinflammatoy cytokines and interactions between these two cells drive further activation of each other. These data suggest that CII-reactive T cell may play a important role in pathogenesis of RA.