• Translational and Clinical Pharmacology
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• v.26 no.3
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• pp.101-102
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• 2018

• Journal of Acupuncture Research
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• v.24 no.3
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• pp.9-18
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• 2007

Objectives: Bloodletting therapeutics is one of the most popular oriental medical treatments in Korea. In this study, we operate the Interview Survey for grasping clinical actual state bloodletting therapeutics in Korea. Methods : Survey questions were developed based on consensus of acupuncture professors. The list of the Korean medical doctors with experiences more than 10 years is provided by the Association of the Korean Oriental Medicine. The interviews were conducted to 39 members of the Korean medical doctors who answered to used bloodletting therapeutics over 30 percentage a day at previous telephone survey. Interview survey with them were conducted by the well-trained interviewers of College of Korean Medicine student from 29th May 2006 to 3rd June 2006. Results : Korean medical doctors prefer to use the bloodletting cupping treatment(89.5%) on the bloodletting therapeutics. Musculo-skeletal disorder was as frequent as 89.5% of treatment disease. The most common treatment area was back(57.9%), extremity(l5.8%), pain area(l0.5%). The most common instrument for treating was disposable lancet(57.9%), three-edged needle(26.3%). Most Korean medical doctors(60.5%) took up the position that bring symptom relief following good treatment area. 'Recover quickly from illness'(50%) was one of bloodletting good points but 'Sever pain'(34.2%) was a weak points. Conclusion : This survey provides unique insight into the perception of the Korean medical doctors at bloodletting therapeutics. Most doctors experienced symptom relief, received positive benefits from the treatment. Future research needs to provide more in-depth insight into doctor views of the experience.

• Journal of Acupuncture Research
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• v.23 no.6
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• pp.177-187
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• 2006

Objectives : Bloodletting therapeutics is one of the most popular oriental treatments in Korea. In this study, we operate the Telephone Survey for grasping clinical actual state bloodletting therapeutics in Korea. Methods : The list of the Korean medical doctors with experiences more than 10 years is provided by the Association of the Korean Oriental Medicine. A stratified random sample of Korean medical doctors is drawn for the telephone interviews. We choose a bound on the error of estimation equal to 3.2 percentage, and the sample size is 321 for the national sample. We develop a questionnaire for telephone interviews. We carefully design the questionnaire to minimize non-sampling errors by using the focus group activities and the pretest. We give the details of the results based on the sample design. Also, we present some socialdemograhpic characteristics for the samples. Telephone interviews with them were conducted by the well-trained interviewers of College of Korean Medicine student from 11th May 2006 to 17th May 2006. Results : 1. Two hundred eighty eight(89.4%) out of 322 Korean oriental medical doctors used bloodletting therapeutics. 2. The most common main bloodletting treatment is reported by patients was musculo-skeletal disorder(60.2%). 3. Two hundred ninety one(90.3%) out of 322 Korean oriental medical doctors opposed that commercial using bloodletting without medical diagnosis. Conclusion : Bloodletting therapeutics is one of the most popular oriental treatments in Korea. The majority(89.4%) of Korean medical doctors used bloodletting therapeutics in this survey.

• Biomolecules & Therapeutics
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• v.25 no.4
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• pp.396-403
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• 2017

Under normal, non-stressed conditions, intracellular p53 is continually ubiquitinated by MDM2 and targeted for degradation. However, in response to severe genotoxic stress, p53 protein levels are markedly increased and apoptotic cell death is triggered. Inhibiting the ubiquitination of p53 under conditions where DNA damage has occurred is therefore crucial for preventing the development of cancer, because if cells with severely damaged genomes are not removed from the population, uncontrolled growth can result. However, questions remain about the cellular mechanisms underlying the regulation of p53 stability. In this study, we show that p53-inducible gene 3 (PIG3), which is a transcriptional target of p53, regulates p53 stability. Overexpression of PIG3 stabilized both endogenous and transfected wild-type p53, whereas a knockdown of PIG3 lead to a reduction in both endogenous and UV-induced p53 levels in p53-proficient human cancer cells. Using both in vivo and in vitro ubiquitination assays, we found that PIG3 suppressed both ubiquitination- and MDM2-dependent proteasomal degradation of p53. Notably, we demonstrate that PIG3 interacts directly with MDM2 and promoted MDM2 ubiquitination. Moreover, elimination of endogenous PIG3 in p53-proficient HCT116 cells decreased p53 phosphorylation in response to UV irradiation. These results suggest an important role for PIG3 in regulating intracellular p53 levels through the inhibition of p53 ubiquitination.

• The Korean Journal of Physiology and Pharmacology
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• v.22 no.3
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• pp.321-329
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• 2018

It was recently reported that the $C_{max}$ and AUC of rosuvastatin increases when it is coadministered with telmisartan and cyclosporine. Rosuvastatin is known to be a substrate of OATP1B1, OATP1B3, NTCP, and BCRP transporters. The aim of this study was to explore the mechanism of the interactions between rosuvastatin and two perpetrators, telmisartan and cyclosporine. Published (cyclosporine) or newly developed (telmisartan) PBPK models were used to this end. The rosuvastatin model in Simcyp (version 15)'s drug library was modified to reflect racial differences in rosuvastatin exposure. In the telmisartan-rosuvastatin case, simulated rosuvastatin $C_{maxI}/C_{max}$ and $AUC_I/AUC$ (with/without telmisartan) ratios were 1.92 and 1.14, respectively, and the $T_{max}$ changed from 3.35 h to 1.40 h with coadministration of telmisartan, which were consistent with the aforementioned report ($C_{maxI}/C_{max}$: 2.01, $AUC_I/AUC$:1.18, $T_{max}:5h{\rightarrow}0.75h$). In the next case of cyclosporine-rosuvastatin, the simulated rosuvastatin $C_{maxI}/C_{max}$ and $AUC_I/AUC$ (with/without cyclosporine) ratios were 3.29 and 1.30, respectively. The decrease in the $CL_{int,BCRP,intestine}$ of rosuvastatin by telmisartan and cyclosporine in the PBPK model was pivotal to reproducing this finding in Simcyp. Our PBPK model demonstrated that the major causes of increase in rosuvastatin exposure are mediated by intestinal BCRP (rosuvastatin-telmisartan interaction) or by both of BCRP and OATP1B1/3 (rosuvastatin-cyclosporine interaction).

• Journal of Korean Medical Science
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• v.33 no.53
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• pp.298.1-298.10
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• 2018

Background: The renal function of individuals is one of the reasons for the variations in therapeutic response to various drugs. Patients with renal impairment are often exposed to drug toxicity, even with drugs that are usually eliminated by hepatic metabolism. Previous study has reported an increased plasma concentration of indoxyl sulfate and decreased plasma concentration of $4{\beta}$-hydroxy (OH)-cholesterol in stable kidney transplant recipients, implicating indoxyl sulfate as a cytochrome P450 (CYP) inhibiting factor. In this study, we aimed to evaluate the impact of renal impairment severity-dependent accumulation of indoxyl sulfate on hepatic CYP3A activity using metabolic markers. Methods: Sixty-six subjects were enrolled in this study; based on estimated glomerular filtration rate (eGFR), they were classified as having mild, moderate, or severe renal impairment. The plasma concentration of indoxyl sulfate was quantified using liquid chromatography-mass spectrometry (LC-MS). Urinary and plasma markers ($6{\beta}$-OH-cortisol/cortisol, $6{\beta}$-OH-cortisone/cortisone, $4{\beta}$-OH-cholesterol) for hepatic CYP3A activity were quantified using gas chromatography-mass spectrometry (GC-MS). The total plasma concentration of cholesterol was measured using the enzymatic colorimetric assay to calculate the $4{\beta}$-OH-cholesterol/cholesterol ratio. The correlation between variables was assessed using Pearson's correlation test. Results: There was a significant negative correlation between MDRD eGFR and indoxyl sulfate levels. The levels of urinary $6{\beta}$-OH-cortisol/cortisol and $6{\beta}$-OH-cortisone/cortisone as well as plasma $4{\beta}$-OH-cholesterol and $4{\beta}$-OH-cholesterol/cholesterol were not correlated with MDRD eGFR and the plasma concentration of indoxyl sulfate. Conclusion: Hepatic CYP3A activity may not be affected by renal impairment-induced accumulation of plasma indoxyl sulfate.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2002.11a
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• pp.51-58
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• 2002

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2002.11a
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• pp.43-50
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• 2002

• Journal of Pharmaceutical Investigation
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• v.39 no.3
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• pp.207-216
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• 2009

Fluconazole is used as an orally administrated antifungal drug for the treatment of tinea corporis, candidiasis including skin mycotic pneumonia infections. The dosage of fluconazole varies with indication ranging from 50 mg/day to 400 mg/day. The fluconazole capsule 50 mg (3 capsules daily) is already available in Korean market. To improve the patient compliance, a fluconazole tablet 150 mg (once a day administration) was developed recently. The purpose of this study was to evaluate the bioequivalence of three doses of fluconazole capsule 50 mg (Diflucan 50 mg, Pfizer Korea Inc., as a reference drug) and a single dose of fluconazole tablet 150 mg (Plunazol 150 mg, Daewoong Pharm. Co., Korea) according to the guidelines of the Korea Food and Drug Administration (KFDA). The bioequivalence for three capsules of Diflucan 50 mg and a single tablet of Plunazol 150 mg was investigated in twenty-four healthy male volunteers under a randomized 2${\times}$2 crossover trial design. The average age of twenty-four volunteers was 24.78${\pm}$3.27 year-old, average height was 175.56${\pm}$5.45 cm and average weight was 67.24${\pm}$6.86 kg. After three capsules of Diflucan 50 mg or a single tablet of Plunazol 150 mg were orally administered, blood was taken at predetermined time intervals and the plasma concentrations of fluconazole in plasma were determined using LC-MS-MS. The 90% confidence intervals for the main parameters of statistical results after logarithmic transformation were AUCt 0.9272-1.0084 and Cmax 0.8423-0.9544 respectively, which are in the range of log 0.8 to log 1.25 and the statistical results of additional parameters (AUClast, t1/2 and MRT) were also in the 90% confidence interval that is in the range of log 0.8 to log 1.25. Therefore, the results of this study confirm the bioequivalence of three capsules of Diflucan 50 mg to one tablet of Plunazol 150 mg.

• Journal of Radiation Protection and Research
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• v.42 no.4
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• pp.189-196
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• 2017

Background: The effects of radiation on tissues vary depending on the radiation type. In this study, a minipig model was used to compare the effects of ${\beta}$-rays from $^{166}Ho$ and ${\gamma}$-rays from $^{60}Co$ on the skin. Materials and Methods: In this study, the detrimental effects of ${\beta}$- and ${\gamma}$-irradiation on the skin were assessed in minipigs. The histopathological changes in the skin from 1 to 12 weeks after exposure to 50 Gy of either ${\beta}$- (using $^{166}Ho$ patches) or ${\gamma}$- (using $^{60}Co$) irradiation were assessed. Results and Discussion: The skin irradiated by ${\beta}$-rays was shown to exhibit more severe skin injury than that irradiated by ${\gamma}$-rays at 1-3 weeks post-exposure; however, while the skin lesions caused by ${\beta}$-rays recovered after 8 weeks, the ${\gamma}$-irradiated skin lesions were not repaired after this time. The observed histopathological changes corresponded with gross appearance scores. Seven days post-irradiation, apoptotic cells in the basal layer were detected more frequently in ${\beta}$-irradiated skin than in ${\gamma}$-irradiated skin. The basal cell density and skin thickness gradually decreased until 4 weeks after ${\gamma}$- and ${\beta}$- irradiation. In ${\beta}$-irradiated skin lesions, and the density and thickness increased sharply back to control levels by 6-9 weeks. However, this was not the case in ${\gamma}$-irradiated skin lesions. In ${\gamma}$-irradiated skin, cyclooxygenase-2 (COX-2) was shown to be expressed in the epidermis, endothelial cells of vessels, and fibroblasts, while ${\beta}$-irradiated lesions exhibited COX-2 expression that was mostly limited to the epidermis. Conclusion: In this study, ${\beta}$-rays were shown to induce more severe skin injury than ${\gamma}$-rays; however, the ${\beta}$-rays-induced injury was largely repaired over time, while the ${\gamma}$-rays-induced injury was not repaired and instead progressed to necrosis. These findings reveal the differential effects of ${\gamma}$- and ${\beta}$-irradiation on skin and demonstrate the use of minipigs as a beneficial experimental model for studying irradiation-induced skin damage.