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1.
Article in English | WPRIM | ID: wpr-914594

ABSTRACT

BACKGROUND@#Smectite can serve as a drug delivery system and gentamicin-intercalated smectite hybrids are expected to supersede the standard therapy for Helicobacter pylori eradication. The aim of this study was to confirm whether the minimum inhibitory concentration (MIC) of aminoglycosides applied as smectite hybrids remained low against recently isolated H. pylori strains.@*MATERIALS AND METHODS@#A total of 140 strains were collected for a minimum period of 3 years. Antimicrobial susceptibility tests were performed, and the MICs of eight antibiotics (amoxicillin, clarithromycin, metronidazole, tetracycline, levofloxacin, gentamicin, netilmicin, and tobramycin) were determined by using the Epsilometer test and following the European Committee on Antimicrobial Susceptibility Testing recommendations.@*RESULTS@#The resistance rate of clarithromycin was high, up to 30.7%, although it is a major antimicrobial agent used in standard therapy. The MIC50 and MIC90 of gentamicin (0.25 mg/L and 0.75 mg/L) and netilmicin (0.19 mg/L and 0.75 mg/L) were lower than other alternative therapies for H. pylori eradication. In clarithromycin-resistant strains, the MIC50 was 0.25 mg/L and the MIC90 was 1 mg/L for gentamicin; for netilmicin, the values were 0.25 mg/L and 0.75 mg/L, respectively.@*CONCLUSION@#Through the use of gentamicin and netilmicin, which have low MICs for H. pylori, aminoglycoside-intercalated smectite hybrids are expected to emerge as a new standard therapy for H. pylori eradication.

2.
Gut and Liver ; : 641-647, 2018.
Article in English | WPRIM | ID: wpr-718123

ABSTRACT

BACKGROUND/AIMS: Helicobacter pylori eradication rates are decreasing because of increases in clarithromycin resistance. Thus, finding an easy and accurate method of detecting clarithromycin resistance is important. METHODS: We evaluated 70 H. pylori isolates from Korean patients. Dual-labeled peptide nucleic acid (PNA) probes were designed to detect resistance associated with point mutations in 23S ribosomal ribonucleic acid gene domain V (A2142G, A2143G, and T2182C). Data were analyzed by probe-based fluorescence melting curve analysis based on probe-target dissociation temperatures and compared with Sanger sequencing. RESULTS: Among 70 H. pylori isolates, 0, 16, and 58 isolates contained A2142G, A2143G, and T2182C mutations, respectively. PNA probe-based analysis exhibited 100.0% positive predictive values for A2142G and A2143G and a 98.3% positive predictive value for T2182C. PNA probe-based analysis results correlated with 98.6% of Sanger sequencing results (κ-value=0.990; standard error, 0.010). CONCLUSIONS: H. pylori clarithromycin resistance can be easily and accurately assessed by dual-labeled PNA probe-based melting curve analysis if probes are used based on the appropriate resistance-related mutations. This method is fast, simple, accurate, and adaptable for clinical samples. It may help clinicians choose a precise eradication regimen.


Subject(s)
Clarithromycin , Fluorescence , Freezing , Helicobacter pylori , Helicobacter , Humans , Methods , Peptide Nucleic Acids , Point Mutation , RNA
3.
Korean Journal of Urology ; : 737-740, 2005.
Article in Korean | WPRIM | ID: wpr-61281

ABSTRACT

PURPOSE: The severity of electrical injury depends on the intensity and pathway of the electric current. We hypothesized that erectile dysfunction (ED) may be a sequelae of electrical injury. Therefore, in this study, the prevalence of ED in electrical injury patients was estimated, and the results correlated with the electric voltage and pathway of the electric current at the time of the injury. MATERIALS AND METHODS: Mail and phone surveys were undertaken by 416 electrical injury patients admitted with electrical injury to our burn care center, between November, 1998 and December, 2003. Patients were given a self-administered questionnaire, which included the five item Korean version of the International Index of Erectile Function (IIEF-5). The voltage, pathway of electric current at the time of injury and other diseases, such as hypertension (HTN), diabetes mellitus (DM) and neurological disease, were also reviewed. Of the 416 (66%) subjects, 276 agreed to participate, but 20 (7%) of these were excluded due to HTN, DM and neurological disease. RESULTS: The remaining 256 patients constituted our patient population. The mean age was 39.2 (range 21 to 66) years. 52.7% of the 256 patients had ED. According to age, the prevalence of ED in patients in their third, forth, fifth and sixth decades were 43.8, 54.2, 55.8 and 42.9%, respectively; no patient in their seventh decade showed ED. There was no statistically significant difference among the age groups. 58.4, 21.2 and 33.3% patients with high, low and unknown voltage injuries had ED, which was statistically significant. The prevalence of ED according to the pathway of the electric current were 100, 70.3, 44.4, 31.9, 15.4 and 22.2% for whole body, upper-lower body, lower-lower body, upper-upper body, electrical spark burn and for unknown pathways, respectively. CONCLUSIONS: To our knowledge, this is the first study of ED in electrical injury patients. 52.7% of patients with electrical injury had ED. High voltage injures showed a higher prevalence of ED than low voltage injuries. Whole and upper-lower body pathways of the electric current showed a higher prevalence of ED compared to focal/local involvement (electrical spark burn), lower-lower body and upper-upper body pathways.


Subject(s)
Burns , Diabetes Mellitus , Erectile Dysfunction , Humans , Hypertension , Male , Postal Service , Prevalence , Surveys and Questionnaires
4.
Korean Journal of Urology ; : 648-650, 2005.
Article in Korean | WPRIM | ID: wpr-7260

ABSTRACT

Dermatofibrosarcoma protuberans is an unusual locally aggressive cutaneous neoplasm of low grade malignancy. We report the case of a 47 years- old male who presented with an asymptomatic erythematous firm protruding mass in the left peri-inguinal area. Histopathologically, the tumor showed spindle-shape cells, arranged in a storiform pattern. The tumor cells stained positively for Vimentin and CD34 on immunohistochemical staining. Herein, we report a case of dermatofibrosarcoma protuberans.


Subject(s)
Dermatofibrosarcoma , Humans , Male , Vimentin
5.
Korean Journal of Urology ; : 1008-1013, 2002.
Article in Korean | WPRIM | ID: wpr-149958

ABSTRACT

PURPOSE: We prospectively determined the value of a non-enhanced spiral CT (NESCT) in the diagnosis of suspected urolithiasis by a comparison with excretory urography (EU). MATERIALS AND METHODS: After giving informed consents, 114 and 103 patients, with suspected urolithiasis, underwent either NESCT or EU, respectively. All the NESCT and EU films were assessed by 2 urologists and 1 radiologist with no knowledge of the clinical histories. The sensitivity, specificity, positive and negative predictive value, diagnostic accuracy and other valuable diagnostics in each group were compared. RESULTS: The sensitivity, specificity and accuracy of NESCT in diagnosing urinary calculi were 96.8, 95.2 and 96.5%, and for EU, were 75.3, 90.9 and 78.6%, respectively. The examinations were performed with an average of less than 5 minutes for the NESCT versus 113+/-31 minutes for the EU, and the times taken to a definitive diagnosis in the two groups were 2.4+/-0.3 and 59+/-5.2 hours, respectively. In the EU group, 24 patients (23.3%) had revisited and 11 (10.6%) were admitted for pain control, prior to the imaging evaluation, only 2 patients (1.7%) revisited, and none were admitted in the NESCT group. In our institution, the cost of a NESCT was more expensive than that of an EU (140,000 vs. 35,790 Won), however the cost-effectiveness is enhanced by the accuracy of NESCT, which lead to fewer ancillary studies. CONCLUSIONS: NESCT is accurate, reliable and safe, and has many advantages over EU, and therefore could be recommended as a first diagnostic modality for the evaluation of patients with suspected urolithiasis.


Subject(s)
Diagnosis , Humans , Prospective Studies , Sensitivity and Specificity , Tomography, Spiral Computed , Urinary Calculi , Urography , Urolithiasis
6.
Article in Korean | WPRIM | ID: wpr-29907

ABSTRACT

PURPOSE: recent studies have reported that the expression of Drg-1 is up-regulated by androgen. It has been suggested that Drg-1 gene be used as a molecular marker for prostate cancer therapies like PSA. To de termine the role of Drg-1 gene as a molecular marker during intermittent androgen deprivation(IAD) therapy, we investigated the expression of Drg-1 and compared it with PSA expression in human prostate cancer cell lines treated with dihydrotestosterone (DHT) continuously or intermittently. MATERIALS AND METHODS: Two prostate cancer cells having different status of androgen receptor [LNCaP (androgen dependent) and PC-3 (androgen independent)] were used in this study. To know the change in PSA and Drg-1 expression after DHT treatment the cells were cultured in steroid-free RPMI media for 24 hours. 10(-7) and 10(-8)M of DHT and 10(-7)M bicalutimide was added into the cells and then cultured for 72 hours. And we established in vitro IAD model using LNCaP cells. Northern analyses were performed to determine the expression level of both PSA and Drg-1genes. Also, western analyses were performed to determine the protein level of proliferating cellular nuclear antigen and androgen receptor. RESULTS: Transcripts of Drg-1 were detected in both LNCaP and PC-3 cells but PSA was not expressed in PC-3 cells. The expression of Drg-1gene in LNCaP cells was up-regulated by 10(-8)M of DHT like PSA gene and down-regulated by 10(-7)M bicalutamide. In the treatment of intermittent androgen deprivation, the expression pattern of Drg-1was similar to that of PSA. However, up-regulation of PSA was detected earlier than of Drg-1. CONCLUSIONS: Based on observation, Drg-1 was up-regulated by androgen and down-regulated by anti-androgen. This suggests that Drg-1gene is useful for determining the androgen independency of prostate cancer during IAD.


Subject(s)
Cell Line , Dihydrotestosterone , Humans , Prostate , Prostatic Neoplasms , Receptors, Androgen , Up-Regulation
7.
Korean Journal of Urology ; : 206-212, 2001.
Article in Korean | WPRIM | ID: wpr-184759

ABSTRACT

PURPOSE: Laparoscopic nephrectomy has become accepted as a method of simple nephrectomy replacing with open nephrectomy in patients in whom a kidney requires removal for benign disease. Laparoscopic nephrecto my is widely performed and extends its indications. We evaluated our experience with the laparoscopic nephrectomy to assess the clinical efficacy. MATERIALS AND METHODS: Between April 1996 and September 1999, 23 patients (7 men and 16 women, mean age 44.1 years old) underwent laparoscopic nephrectomy, 16 by women, mean age 44.1 years old) underwent laparoscopic nephrectomy, 16 by the transperitoneal approach and 7 by the retroperitoneal approach. Operative and clinical records were reviewed. The underlying pathological conditions included 20 cases of non-functioning kidney, 2 cases of hypoplastic kidney with complete duplication and ectopic ureter, and 1 case of ureter tumor. Four ports (21 cases, two 12mm ports and two 5mm ports) or 5 posts ( 2 cases, two 12mm ports and three 5mm ports) were used. RESULTS: The laparoscopic procedure were successful in 20 cases (87%). Three patients had open conversion due to unclear anatomy, severe adhesion, and adrenal bleeding. In successful cases, mean operative time was 253+/-83 minutes (range 140-545), mean hospital stay was postoperative 5.2 days. Intraoperative and perioperative complications were noted in 6 patients, including bleeding requiring transfusion in 3, wound infection in 1, severe subcutaneous emphysema in 1, diarrhea in 1. CONCLUSIONS: Laparoscopic simple nephrectomy is feasible, effective, and safe treatment option. It is a less invasive alternative to open surgery providing a more rapid recuperation and superior cosmetic effect.


Subject(s)
Diarrhea , Female , Hemorrhage , Humans , Kidney , Laparoscopy , Length of Stay , Male , Nephrectomy , Operative Time , Subcutaneous Emphysema , Ureter , Wound Infection
8.
Korean Journal of Urology ; : 1335-1341, 2000.
Article in Korean | WPRIM | ID: wpr-29690

ABSTRACT

No abstract available.


Subject(s)
Kidney Calculi
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