Hyperosmotic Stimulus Down-regulates 1alpha, 25-dihydroxyvitamin D3-induced Osteoclastogenesis by Suppressing the RANKL Expression in a Co-culture System

The hyperosmotic stimulus is regarded as a mechanical factor for bone remodeling. However, whether the hyperosmotic stimulus affects 1alpha, 25-dihydroxyvitamin D3 (1alpha,25(OH)2D3)-induced osteoclastogenesis is not clear. In the present study, the effect of the hyperosmotic stimulus on 1alpha,25(OH)2D3-induced osteoclastogenesis was investigated in an osteoblast-preosteoclast co-culture system. Serial doses of sucrose were applied as a mechanical force. These hyperosmotic stimuli significantly evoked a reduced number of 1alpha,25(OH)2D3-induced tartrate-resistant acid phosphatase-positive multinucleated cells and 1alpha,25(OH)2D3-induced bone-resorbing pit area in a co-culture system. In osteoblastic cells, receptor activator of nuclear factor kappaB ligand (RANKL) and Runx2 expressions were down-regulated in response to 1alpha,25(OH)2D3. Knockdown of Runx2 inhibited 1alpha,25(OH)2D3-induced RANKL expression in osteoblastic cells. Finally, the hyperosmotic stimulus induced the overexpression of TonEBP in osteoblastic cells. These results suggest that hyperosmolarity leads to the down-regulation of 1alpha,25(OH)2D3-induced osteoclastogenesis, suppressing Runx2 and RANKL expression due to the TonEBP overexpression in osteoblastic cells.

The Efficacy of Cimetropium Bromide as a Premedication before Esophagogastroduodenoscopy / 대한소화기내시경학회지

BACKGROUND/AIMS: Cimetropium bromide has been used widely as a premedication for endoscopy; however, there are no subjective data pertaining to the effects of cimetropum bromide as a premedication. Thus, the current study was undertaken to compare the effects of cimetropum bromide with placebo as a premedication for esophagogastroduodenoscopy (EGD). METHODS: Two hundred ninety-nine consecutive outpatients who had undergone EGD were enrolled in this study. Thirty minutes before EGD, the patients were randomly given an intramuscular injection of cimetropium bromide (5 mg) or saline using a placebo-controlled, double-blind, randomized technique. Immediately after EGD, all the patients and endoscopists were requested to fill out the questionnaire form. RESULTS: One-hundred patients were injected with cimetropium bromide and 150 patients were injected with placebo. There was no statistically significant difference in the degree of residual gastric secretions, the peristaltic activity detected by endoscopists, and the comfort experienced by the patients in each study group. CONCLUSIONS: The intramuscular injection of cimetropium bromide (5 mg) as a premedication for EGD was not significantly superior to placebo, at least with respect to subjective parameters, in spite of its broad use.

The Prognosis of Focal Segmental Glomerulosclerosis Patients with Methylprednisolone Pulse Therapy Alone

PURPOSE: Since the first report by Mendoza in 1990, there have been several studies reporting that long-term intravenous methylprednisolone(MP) pulse therapy combined with cyclosporin A(CsA) or cyclophosphamide might be beneficial for the treatment of steroid resistant focal segmental glomerulosclerosis(FSGS). We investigated the therapeutic effect of long-term MP pulse therapy without CsA or cyclophosphamide on steroid resistant FSGS. METHODS: The medical records of the 10 steroid resistant FSGS patients who were treated with MP pulse therapy by the Mendoza protocol without CsA or cyclophosphamide in our hospital were retrospectively reviewed. RESULTS: The median age at onset was 2.6 years(range 1.1-10.6 years) and the median age at the initiation of therapy was 5.7 years(range 1.8-20 years). The median duration of follow-up was 35 months(range 4-132 months). At the end of therapy, 5 patients achieved complete remission(50%) and 2 partial remission(20%), one of whom relapsed after the therapy. Three patients did not respond to the therapy, two of whom progressed to end-stage renal failure during the therapy eventually requiring kidney transplantation. CONCLUSION: Intravenous long-term MP pulse therapy without CsA or cyclophosphamide by the Mendoza protocol may be effective in a subset of patients with steroid-resistant FSGS.

A Case of ANCA-associated Pauci-immune Crescentic Glomerulonephritis in Juvenile Rheumatoid Arthritis

Juvenile rheumatoid arthritis(JRA) is the most common major connective tissue disease in children. Renal involvement in JRA is rare. Among the renal lesions that have been reported in JRA, amyloidosis and drug-induced nephropathy are the most common. Crescentic glomerulonephritis in JRA has rarely been reported. We report a case of ANCA-associated pauci-immune crescentic glomerulonephritis in JRA. The patient was a 15-year old boy with a 3-year history of JRA. He presented with gross hematuria, proteinuria, positive p-ANCA and elevation of BUN and creatinine. Pathologic findings revealed focal necrotizing and crescentic glomerulonephritis. There were no significant immunoglobulin or complement deposits. His renal function recovered after intravenous methylprednisolone pulse therapy and oral steroid use. In Korea, this is the first reported case of pauci-immune crescentic glomerulonephritis in JRA.

Membranous Glomerulopathy Showing Asymptomatic Isolated Microscopic Hematuria Only

PURPOSE: Membranous glomerulopathy is a glomerular disease characterized by the presence of subepithelial immune deposits with thickening of the capillary wall of the glomerulus without inflammatory change. The pathogenesis of membranous glomerulopathy is still unknown. Its incidence is higher in males, and it is rarely found in infants and adolescents. Among the clinical manifestations proteinuria is most common, while edema and hematuria are present. According to reports from other countries, among few patients diagnosed with membranous glomerulopathy by renal biopsy, show isolated microscopic hematuria without the clinical manifestations. Little research in this area has been performed in Korea, and so we conducted retrograde studies on membranous glomerulopathy associated with isolated microscopic hematuria. MATERIALS AND METHODS: We analyzed retrogradely 109 cases of asymptomatic isolated microscopic hematuria that were diagnosed as membranous glomerulopathy by renal biopsy at Yonsei University Severance hospital from January, 1992 to July, 2001. RESULTS: In 87 of the 109 cases patients were over 15 years old while in 22 cases patients were under 15 at the time of dignosis. Only three patients showed isolated microscopic hematuria without the clinical manifestations and abnormal laboratory findings and they were all male patients under 15 years old. CONCLUSION: Few cases of the membranous glomerulopathy show only asymptomatic isolated microscopic hematuria. However, since membranous glomerulopathy can be found in patients who present with asymptomatic isolated microscopic hematuria only, if adequate indication for renal biopsy is present, we conclude that renal biopsy must be aggresively pursued in order to find the underlying disease.

Polyomavirus Induced Interstital Nephritis in Renal Allograft Recipient / 대한이식학회지

We report our experience of renal polyomavirus infection after renal allograft leading to graft dysfunction. A fourty seven-years-old male patient, has been on Tacrolimus based dual immunosuppression, showed graft dysfunction with rising serum creatinine at post-transplant day 140. His graft function had been good without any acute rejection episode. A tentative diagnosis of acute rejection was rendered and core needle biopsy was performed. Viral infection was initially suggested by the occurrence of markedly enlarged tubular epithelial cells containing large nuclei with smudgy chromatin pattern. Confirmatory diagnosis of human polyomavirus induced interstitial nephritis was obtained by electron microscopy, which showed viral particles in the nuclei of tubular epithelial cells. After Tacrolimus was converted to cyclosporine, renal function was stabilized. A review of the literature indicates that asymptomatic infection, ureteric stricture, and hemorrhagic cystitis are other possible manifestations of polyomavirus in the human urogenital tract. According to some prior reports, polyomavirus induced interstitial nephritis might be a cause of graft loss. But our patient has retained a stable graft function with a chnange of immunosuppression.

Clinical Manifestation and Therapeutic Effect of Azathioprine in Lupus Nephritis of Children / 대한신장학회잡지

PURPOSE: The incidence of clinical nephritis is much higher especially in younger ages and in about one half of the cases, it also shows nephrotic syndrome. Thus, we examine the clinical and pathologic consideration of children with lupus nephritis and their treatment modality to improve the prognosis. MATERIAL AND METHOD: Among 67 cases of children under eighteen who were diagnosed SLE, 50 patients with hematuria and proteinuria from Jan. 1980 to Dec. 1996 were selected for the review. RESULTS: The ratio of the male to female patient was 1:3.5 and the average age at the diagnosis was 11.85+/-3.2 years old. Most common clinical manifestations at the time of the diagnosis were fever and skin rashes and the common laboratory results were proteinuria, hematuria, Out of 50 cases, 33 cases had renal biopsy. The results were 17 cases of Class IV, 7 cases of Class lll, 5 cases of Class lll, 3 cases of Class V and 1 case of Class l. Different treatment modalities were carried out; Corticosteroid only 21 cases, Corticosteroid+Azathioprine 25 cases, Corticosteroid+Cyclophosphamide 3 cases, and Corticosteroid+Cyclosporine A 1 case. However, there were no significant difference in the recurrence and complete remission rate of lupus nephritis in between each treatment groups. Average follow-up period was 37+/-23 months. Of all the follow-ups, 7 patients were dead. CONCLUSION: Early diagnosis should be carried out with renal biopsy, and should be considered for vigorous therapy, which currently includes high doses of corticosteroids and immunosuppressive drugs. Among these immunosuppressive agents, azathioprine has a lower incidence of long-term complications and low costs might be recommended. In addition, regular check-up for anti-DNA antibody, serum complement concentration and appropriate moniroting and management for the adverse effects of the treatment should enable to reach the continuous remission.

The Clinical Outcome of IgA Nephropathy After Renal Transplantation / 대한내과학회지

OBJECTIVES: Primary IgA nephropathy is the most common type of glomerulonephritis, which may progress to end stage renal failure in about 30-35% of the cases. The incidence of recurrence of IgA nephropathy in transplanted kidney is approximately 50-60% but IgA nephropathy which is recurred in graft has relatively benign clinical course so the rate of graft loss due to recurrent IgA nephropathy is about 10%. Overall graft survival rate of IgA nephropathy is higher than other glomerular disorders which cause end stage renal disease according to recent clinical studies. However accurate causative disorders of end stage renal failure had seldom been reported by pathologic examination and accurate graft survival rate and recurrence rate of original disease after renal transplantation couldn't be investigated. We performed analysis of clinical outcome and prognosis for IgA group. METHODS: 1259 cases of kidney transplantation were performed in the Severance hospital between Apr 1979 and Dec.1994. We selected 178 cases of those who got renal biopsy and excluded the cases of cadaveric transplants, hepatitis B antigen carrier, diabetes mellitus and not taking cyclosporine A. 178 cases of those were divided into two groups, IgA and nonIgA group. We performed analysis of 5 year graft and patient survival rate between two groups. The IgA group was divided into two group, recurrent and not-recurrent IgA group. We also performed analysis of recurrence rate and graft survival rate between two groups. RESULTS: 1) 62 cases(35.2M) were IgA group and 116 cases were non-IgA group. 2) Male to female ratio of IgA group was 2.9:1, whose age averaged 35 years old. 3) Among 6 cases of the IgA group, 3 cases lost their graft due to chronic rejection, 2 cases due to recurrence and 1 case due to acute rejection. 4) The 5 year graft survival rate of IgA and nonIgA group were 85%, 90% each without statistical significance(p>0.05). The 5 year patient survival rate of IgA and nonlgA group after renal allograft were 100%, 97% each without statistical significance(p>0.05). 5) 266 cases of posttransplant kidney biopsies were performed and 10 cases were diagnosed as recurrent IgA nephropathy with recurrence rate of 15%. 6) Renal insufficiency was noted in 4 cases of recurrent IgA nephropathy, 2 cases of those were chronic renal failure and the other 2 cases lost their graft. The histologic findings of these cases included mesangial widening and proliferation(4 cases), glomerulosclerosis(2 cases), crescent formation(1 cases). 7) The interval between transplantation and recurrence averaged 41 months. 24hr proteinuria and serum level of creatinine at the time of diagnosis averaged 2.6g and 2.2 mg/dl each. 8) Male to female ratio, age, HLA type and degree of HLA match showed no significant difference between nonrecurrent and recurrent IgA group in graft but 5 year graft survival rate of recurrent IgA group was lower than nonrecurrent group with statistical significance(71% vs 83%, p<0.05). CONCLUSION: Recurrent IgA nephropathy in transplanted kidney might be one of major cause of graft loss with chronic rejection. However precise pathologic examination of before k after transplantation on larger patient population and more long term follow-up are advised.

Evaluation of nephrotoxicity of cyclosporin a treatment in pediatric nephrotic patients / 대한신장학회잡지

No abstract available.

A study of calcium and inorganic phosphorus levels in maternal and cord blood

No abstract available.

A case Rh negative brother and sister, both of whose parents were Rh positive

No abstract available.

Caudal Regression Syndrome Associated with Potter Syndrome

No abstract available.