1.Dronedarone hydrochloride enhances the bioactivity of endothelial progenitor cells via regulation of the AKT signaling pathway
Jian ZHANG ; Thi Hong VAN LE ; Vinoth Kumar RETHINESWARAN ; Yeon-Ju KIM ; Woong Bi JANG ; Seung Taek JI ; Thanh Truong GIANG LY ; Jong Seong HA ; Jisoo YUN ; Jae Hun CHEONG ; Jinsup JUNG ; Sang-Mo KWON
The Korean Journal of Physiology and Pharmacology 2021;25(5):459-466
Cardiovascular disease (CVD) and its complications are the leading cause of morbidity and mortality in the world. Because of the side effects and incomplete recovery from current therapy, stem cell therapy emerges as a potential therapy for CVD treatment, and endothelial progenitor cell (EPC) is one of the key stem cells used for therapeutic applications. The effect of this therapy required the expansion of EPC function. To enhance the EPC activation, proliferation, and angiogenesis using dronedarone hydrochloride (DH) is the purpose of this study. DH received approval for atrial fibrillation treatment and its cardiovascular protective effects were already reported. In this study, DH significantly increased EPC proliferation, tube formation, migration, and maintained EPCs surface marker expression. In addition, DH treatment up-regulated the phosphorylation of AKT and reduced the reactive oxygen species production. In summary, the cell priming by DH considerably improved the functional activity of EPCs, and the use of which might be a novel strategy for CVD treatment.
2.Dronedarone hydrochloride enhances the bioactivity of endothelial progenitor cells via regulation of the AKT signaling pathway
Jian ZHANG ; Thi Hong VAN LE ; Vinoth Kumar RETHINESWARAN ; Yeon-Ju KIM ; Woong Bi JANG ; Seung Taek JI ; Thanh Truong GIANG LY ; Jong Seong HA ; Jisoo YUN ; Jae Hun CHEONG ; Jinsup JUNG ; Sang-Mo KWON
The Korean Journal of Physiology and Pharmacology 2021;25(5):459-466
Cardiovascular disease (CVD) and its complications are the leading cause of morbidity and mortality in the world. Because of the side effects and incomplete recovery from current therapy, stem cell therapy emerges as a potential therapy for CVD treatment, and endothelial progenitor cell (EPC) is one of the key stem cells used for therapeutic applications. The effect of this therapy required the expansion of EPC function. To enhance the EPC activation, proliferation, and angiogenesis using dronedarone hydrochloride (DH) is the purpose of this study. DH received approval for atrial fibrillation treatment and its cardiovascular protective effects were already reported. In this study, DH significantly increased EPC proliferation, tube formation, migration, and maintained EPCs surface marker expression. In addition, DH treatment up-regulated the phosphorylation of AKT and reduced the reactive oxygen species production. In summary, the cell priming by DH considerably improved the functional activity of EPCs, and the use of which might be a novel strategy for CVD treatment.
3.Survey of the management of patients with bronchiectasis: a pilot investigation in Asian populations
Ho Cheol KIM ; Masaru SUZUKI ; Hui Fang LIM ; Le Thi Tuyet LAN ; Ho Lam NGUYEN ; Jeng-Shing WANG ; Kang-Yun LEE ; Jae Seung LEE ; Yeon-Mok OH ; Sang Do LEE ; Hayoung CHOI ; Hyun LEE ; Sei Won LEE
The Korean Journal of Internal Medicine 2021;36(6):1402-1409
Background/Aims:
Although international guidelines for bronchiectasis management have been published in Western countries, there is a lack of data about their application in Asian populations including patients with different phenotypes. We aimed to investigate the current status of bronchiectasis management in Asian populations.
Methods:
A nationwide questionnaire survey was performed of Asian respiratory specialists from South Korea, Japan, Taiwan, Singapore, Vietnam, and Sri Lanka. Participants were invited by e-mail to answer a questionnaire comprising 25 questions based on international guidelines for the management of bronchiectasis.
Results:
A total of 221 physicians participated in the survey. About half of them were Korean (50.2%), with the next most common nationalities being Japanese (23.1%), Taiwanese (13.6%), and Singaporean (7.7%). Only 18 (8.1%) responders had local guidelines for bronchiectasis. While 85 (38.5%) responders checked sputum acid-fast bacillus smear/culture about 1 to 3 times per year, only a small proportion of responders routinely performed a serum immunoglobulin test (36/221, 16.3%) or evaluated for allergic bronchopulmonary aspergillosis (41/221, 18.6%). Less than half (43.4%) of responders performed eradication treatment in patients with drug-sensitive Pseudomonas aeruginosa infection, mainly due to the limited availability of inhaled antibiotics (34.8%). In addition, 58.6% of responders considered physiotherapy such as airway clearance and pulmonary rehabilitation.
Conclusions
Discrepancies might exist between guideline recommendations and practice for bronchiectasis management in Asian populations, partly due to the limited availability of treatment in each country. The development of local guidelines that consider the phenotypes and situation will help to standardize and improve the management of bronchiectasis.
4.Nitric Oxide Inhibitory Constituents from the Fruits of Amomum tsao-ko
Jun Gu KIM ; Thi Phuong Linh LE ; Hye Ryeong HONG ; Jae Sang HAN ; Jun Hwi KO ; Seung Hyun LEE ; Mi Kyeong LEE ; Bang Yeon HWANG
Natural Product Sciences 2019;25(1):76-80
Bioactivity-guided fractionation of MeOH extract of the dried fruits of Amomum tsao-ko led to isolation of nine compounds (1 – 9). Their structures were elucidated by spectroscopic methods including extensive 1D and 2D-NMR, as alpinetin (1), naringenin-5-O-methyl ether (2), naringenin (3), hesperetin (4), 2′,4′,6′-trihydroxy-4-methoxy chalcone (5), tsaokoin (6), boesenbergin B (7), 4-hydroxyboesenbergin B (8), and tsaokoarylone (9). Of these, compound 8 was isolated from a natural source for the first time, which was previously reported as a synthetic product. The isolated compounds (1 – 9) were tested for their inhibitory effects on LPS-induced nitric oxide production in RAW 264.7 macrophages. Among them, three chalcone derivatives (compounds 5, 7, and 8) and a diarylheptanoid (compound 9) exhibited significant inhibitory activity on the NO production with IC₅₀ values ranging from 10.9 to 22.5 µM.
Amomum
;
Chalcone
;
Ether
;
Fruit
;
Macrophages
;
Nitric Oxide
;
Zingiberaceae
5.Long-term evaluations of teeth and dental implants during dental maintenance period.
Da Le YOON ; Yong Gun KIM ; Jin Hyun CHO ; Jae Mok LEE ; Sang Kyu LEE
The Journal of Advanced Prosthodontics 2017;9(3):224-231
PURPOSE: This study was designed to evaluate the teeth and dental implants during dental maintenance therapy over 3 years in different conditions after periodontal and dental prosthetic treatment. MATERIALS AND METHODS: 166 patients received maintenance therapy. 59 patients were treated with 2% minocycline-HCl ointment as local drug delivery (LDD) (L group) and 107 patients were treated without LDD (NL group). Clinical data was collected in maintenance period for evaluation. Patients were classified into groups depending on the application of LDD with maintenance therapy, the type of dental treatment before maintenance period (Pre-Tx), the frequency (F-MT), and regularity (R-MT) of maintenance therapy. RESULTS: The numbers of lost teeth (N-teeth, P=.003) and newly placed dental implants (N-implants, P=.022) are significantly different according to Pre-Tx. F-MT among patients who received surgical dental treatment before maintenance period showed statistical differences in N-teeth (P=.041), but not in N-implants (P=.564). All of the patients in L group showed high F-MT (F-MT1). In NL group, there were no statistical differences in N-teeth or N-implants according to F-MT or R-MT. In F-MT1 group, application of LDD made N-teeth significantly different from both Pre-Tx groups while no significant difference could be found in N-implant. Independent t-test and one-way ANOVA were selected for statistical analysis. CONCLUSION: The regular maintenance therapy and LDD can be effective for teeth during maintenance period. It is not only pharmacological efficacy in decreasing bacterial species that makes LDD a useful adjunct. Application of LDD also motivates patients to take adequate check-ups in the aspects of both frequency and regularity.
Dental Implants*
;
Humans
;
Long-Term Care
;
Minocycline
;
Tooth Loss
;
Tooth*
6.Long-term evaluations of teeth and dental implants during dental maintenance period.
Da Le YOON ; Yong Gun KIM ; Jin Hyun CHO ; Jae Mok LEE ; Sang Kyu LEE
The Journal of Advanced Prosthodontics 2017;9(3):224-231
PURPOSE: This study was designed to evaluate the teeth and dental implants during dental maintenance therapy over 3 years in different conditions after periodontal and dental prosthetic treatment. MATERIALS AND METHODS: 166 patients received maintenance therapy. 59 patients were treated with 2% minocycline-HCl ointment as local drug delivery (LDD) (L group) and 107 patients were treated without LDD (NL group). Clinical data was collected in maintenance period for evaluation. Patients were classified into groups depending on the application of LDD with maintenance therapy, the type of dental treatment before maintenance period (Pre-Tx), the frequency (F-MT), and regularity (R-MT) of maintenance therapy. RESULTS: The numbers of lost teeth (N-teeth, P=.003) and newly placed dental implants (N-implants, P=.022) are significantly different according to Pre-Tx. F-MT among patients who received surgical dental treatment before maintenance period showed statistical differences in N-teeth (P=.041), but not in N-implants (P=.564). All of the patients in L group showed high F-MT (F-MT1). In NL group, there were no statistical differences in N-teeth or N-implants according to F-MT or R-MT. In F-MT1 group, application of LDD made N-teeth significantly different from both Pre-Tx groups while no significant difference could be found in N-implant. Independent t-test and one-way ANOVA were selected for statistical analysis. CONCLUSION: The regular maintenance therapy and LDD can be effective for teeth during maintenance period. It is not only pharmacological efficacy in decreasing bacterial species that makes LDD a useful adjunct. Application of LDD also motivates patients to take adequate check-ups in the aspects of both frequency and regularity.
Dental Implants*
;
Humans
;
Long-Term Care
;
Minocycline
;
Tooth Loss
;
Tooth*
7.Long-term evaluation of teeth and implants during the periodic maintenance in patients with viral liver disease.
Da Le YOON ; Yong Gun KIM ; Jin Hyun CHO ; Sang Kyu LEE ; Jae Mok LEE
The Journal of Advanced Prosthodontics 2016;8(4):321-328
PURPOSE: This study was designed to investigate the maintenance of teeth and implants in patients with viral liver disease. MATERIALS AND METHODS: 316 patients without any significant systemic disease were selected as a control group. Liver disease group was consisted of 230 patients. Necessary data were collected using clinical records and panoramic radiographs. Then, the patients were subdivided into 2 groups based on the type of active dental therapy received before maintenance period (Pre-Tx). Analysis for finding statistically significant difference was performed based on the need for re-treatment of active dental therapy (Re-Tx) and change in the number of teeth (N-teeth) and implants (N-implants). RESULTS: Comparing to control group, the patients with liver disease showed higher value on N-teeth, N-implants, and Re-Tx. Statistically significant differences were found on N-teeth (P=.000) and Re-Tx (P=.000) in patients with non-surgical Pre-Tx. Analysis based on severity of liver disease showed that N-teeth and Re-Tx were directly related to severity of liver disease regardless of received type of Pre-Tx. Significant differences were found on N-teeth (P=.003) and Re-Tx (P=.044) in patients with non-surgical Pre-Tx. CONCLUSION: In this study, it was concluded that liver disease might influence the loss of teeth and cause the relapse of dental disease during maintenance period in patients. A significant positive relationship between tooth and implant loss and severity of liver disease seems to exist.
Humans
;
Liver Diseases*
;
Liver*
;
Long-Term Care
;
Recurrence
;
Stomatognathic Diseases
;
Tooth Loss
;
Tooth*
8.The Performance of a Modified Glasgow Blatchford Score in Predicting Clinical Interventions in Patients with Acute Nonvariceal Upper Gastrointestinal Bleeding: A Vietnamese Prospective Multicenter Cohort Study.
Duc Trong QUACH ; Ngoi Huu DAO ; Minh Cao DINH ; Chung Huu NGUYEN ; Linh Xuan HO ; Nha Doan Thi NGUYEN ; Quang Dinh LE ; Cong Minh Hong VO ; Sang Kim LE ; Toru HIYAMA
Gut and Liver 2016;10(3):375-381
BACKGROUND/AIMS: To compare the performance of a modified Glasgow Blatchford score (mGBS) to the Glasgow Blatchford score (GBS) and the pre-endoscopic Rockall score (RS) in predicting clinical interventions in Vietnamese patients with acute nonvariceal upper gastrointestinal bleeding (AN-VUGIB). METHODS: A prospective multicenter cohort study was conducted in five tertiary hospitals from May 2013 to February 2014. The mGBS, GBS, and pre-endoscopic RS scores were prospectively calculated for all patients. The accuracy of mGBS was compared with that of GBS and pre-endoscopic RS using area under the receiver operating characteristic curve (AUC). Clinical interventions were defined as blood transfusions, endoscopic or radiological intervention, or surgery. RESULTS: There were 395 patients including 128 (32.4%) needing endoscopic treatment, 117 (29.6%) requiring blood transfusion and two (0.5%) needing surgery. In predicting the need for clinical intervention, the mGBS (AUC, 0.707) performed as well as the GBS (AUC, 0.708; p=0.87) and outperformed the pre-endoscopic RS (AUC, 0.594; p<0.001). However, none of these scores effectively excluded the need for endoscopic intervention at a threshold of 0. CONCLUSIONS: mGBS performed as well as GBS and better than pre-endoscopic RS for predicting clinical interventions in Vietnamese patients with ANVUGIB.
Asian Continental Ancestry Group*
;
Blood Transfusion
;
Cohort Studies*
;
Gastrointestinal Hemorrhage
;
Hemorrhage*
;
Humans
;
Prognosis
;
Prospective Studies*
;
ROC Curve
;
Tertiary Care Centers
9.Anti-inflammatory Triterpenes and Glyceryl Glycosides from Kandelia candel (L.) Druce.
Le Duc DAT ; Nguyen Phuong THAO ; Bui Huu TAI ; Bui Thi Thuy LUYEN ; Seo Young YANG ; Sohyun KIM ; Jung Eun KOO ; Young Sang KOH ; Nguyen The CUONG ; Nguyen Hoai NAM ; Nguyen Van THANH ; Phan Van KIEM ; Chau Van MINH ; Young Ho KIM
Natural Product Sciences 2015;21(3):150-154
Phytochemical investigation of Kandelia candel resulted in the isolation of six triterpenes (1 - 5) and two glyceryl glycosides (6 and 7) and their structures were determined by comparing the spectroscopic data with those of reported values. In present study, we described the inhibitory effects of fractions and isolated compounds from K. candel on pro-inflammatory cytokines (IL-12 p40, IL-6, and TNF-alpha) production in lipopolysaccharide (LPS) stimulated bone marrow-derived dendritic cells (BMDCs). Results indicated that compounds 3, 6, and 7 showed potent inhibition on IL-6 production (IC50 values at less than 0.5 microM, respectively). Meanwhile, compounds 6 and 7 exhibited strong inhibitory effects on the production of TNF-alpha (IC50 values of 1.7 +/- 0.1 and 5.5 +/- 0.2 microM). Compounds 1 and 3 were also showed the inhibitory effects on IL-12 p40 production (IC50 values of 8.9 +/- 0.4 and 3.3 +/- 0.1 microM, respectively).
Cytokines
;
Dendritic Cells
;
Glycosides*
;
Interleukin-12
;
Interleukin-6
;
Rhizophoraceae*
;
Triterpenes*
;
Tumor Necrosis Factor-alpha
10.Identification of Anthocyanin from The Extract of Soybean Seedcoat.
Sun Mi PARK ; Jina KIM ; Tran Huu DUNG ; Le Thanh DO ; Do Thi Anh THU ; Mi Kyung SUNG ; Jong Sang KIM ; Hoon YOO
International Journal of Oral Biology 2011;36(2):59-64
Anthocyanins are naturally occuring phytochemicals and the main components of the coloring of plants, flowers and fruits. They are known to elicit antioxidative, anti-inflammatory and cancer preventive activity. In this study, we investigated anthocyanins in black / yellow soybean seedcoats using different methods of detection - thin layer chromatography (TLC), capillary zone electrophoresis (CZE) and HPLC analysis. The anthocyanins in soybean seedcoats were extracted by five independent methods of extraction and the aglycons (anthocyanidins) of the corresponding anthocyanins were prepared by acid mediated hydrolysis. The anthocyanin / anthocyanidin in black soybean seedcoat showed characteristic TLC mobility, CZE electrophoretic retention and HPLC migration time while little of anthocyanins were detected from yellow soybean seedcoat. The extracted anthocyanins showed pH dependent retention time in CZE and spectral change in UV-Vis spectrum. HPLC analysis of the hydrolyzed extract of black soybean seedcoat identified the presence of four anthocyanidins. The major anthocyanin in black soybean seedcoat was cyanin (cyanidin-3-O-glucoside), with the relative order of anthocyanidin in cyanidin > delphinidin > petunidin > pelargonidin.
Anthocyanins
;
Chromatography, High Pressure Liquid
;
Chromatography, Thin Layer
;
Electrophoresis, Capillary
;
Flowers
;
Fruit
;
Hydrogen-Ion Concentration
;
Hydrolysis
;
Retention (Psychology)
;
Soybeans

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