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Wonsuk Choi(Wonsuk Choi),Ju-Wan Kim(Ju-Wan Kim),Hee-Ju Kang(Hee-Ju Kang),Hee Kyung Kim(Hee Kyung Kim),Ho-Cheol Kang(Ho-Cheol Kang),Ju-Yeon Lee(Ju-Yeon Lee),Sung-Wan Kim(Sung-Wan Kim),Robert Stewart(Ro 대한정신약물학회 2022 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.20 No.4
Objective: To investigate individual and interactive associations of baseline serum leptin levels and physical comorbidity with short- and long-term treatment outcomes in outpatients with depressive disorders who received stepwise antidepressant treatment in a naturalistic prospective study design. Methods: Baseline serum leptin levels were measured, and the number of concurrent physical disorders ascertained from 1,094 patients. These patients received initial antidepressant monotherapy; then, for patients with an insufficient response or who experienced uncomfortable side effects, treatment was administered using alternative strategies every 3 weeks in the acute treatment phase (at 3, 6, 9, and 12 weeks) and every 3 months in the continuation treatment phase (at 6, 9, and 12 months). Then, 12-week and 12-month remission, defined as a Hamilton Depression Rating Scale score of ≤7, was estimated. Results: In multivariable logistic regression analyses, individual effects were found only between higher baseline serum leptin levels and 12-week non-remission. Significant interactive effects between higher leptin levels and fewer physical disorders (< 2 physical disorders) on 12-week non-remission were observed. However, neither individual nor interactive effects between leptin levels and physical comorbidity were associated with 12-month remission. Conclusion: The combination of serum leptin level and number of physical disorders may be a useful predictor of short-term treatment responses in patients with depressive disorders receiving pharmacotherapy.
Wonsuk Choi,Hee-Ju Kang,Ju-Wan Kim,Hee Kyung Kim,Ho-Cheol Kang,Ju-Yeon Lee,Sung-Wan Kim,Robert Stewart,Jae-Min Kim 대한정신약물학회 2022 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.20 No.2
Objective: To investigate associations between baseline serum serotonin levels and short- and long-term treatment outcomes in outpatients with depressive disorders in a naturalistic one-year prospective study design. Methods: Patients were recruited at a University hospital in South Korea from March 2012 to April 2017. At baseline, blood samples were obtained from 1,094 patients who received initial antidepressant monotherapy (Step 1). After the Step 1 treatment, further treatment steps (at least Steps 2−4) could be administered every 3 weeks during the acute treatment phase (3, 6, 9, and 12 weeks; n = 1,086), and every 3 months during the continuation treatment phase (6, 9, and 12 months; n = 884). In cases showing an insufficient response or intolerable side effects, patients were asked to choose whether to remain at the current step or enter the next treatment step, with alternative strategies including switching, augmentation, combination, and a mixture of these approaches. Remission was defined as a Hamilton Depression Rating Scale score of ≤ 7. Results: The remission group had significantly higher baseline serum serotonin levels among patients who received Step 1 monotherapy in both acute and continuation treatment phases. These associations remained significant after adjustment for relevant covariates. No associations were found with any other treatment steps. Conclusion: Baseline serum serotonin levels may be used as a biomarker for predicting short- and long-term treatment outcomes in antidepressant monotherapy-treated patients with depressive disorders in a real-world clinical setting.
Consideration to minimize power losses in Synchronous Rectification
Wonsuk Choi,Sungmo young,Dongkook Son,Seunghwan Shin,Dongseok Hyun 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A synchronous rectification in high performance converter design is an essential block for low voltage and high current applications since significant efficiency and power density improvements can be achieved by replacing schottky rectification with synchronous rectification MOSFETs. Many critical parameters for synchronous rectification MOSFETs and even parasitic components in devices and printed circuit board directly affect to system efficiency of synchronous rectifications. Optimization of the MOSFETs plays an important role in improving efficiency of synchronous rectification. This paper shows the impact of power MOSFET parameters and parasitic inductance on efficiency of synchronous rectification through loss analysis of power MOSFET from an experiment and a simulation results.
Wonsuk Choi,ALI HAMIDOGHLI,배진호,Seonghun Won,최윤희,김강웅,이봉주,허상우,한현섭,배승철 한국수산과학회 2020 Fisheries and Aquatic Sciences Vol.23 No.3
Background: High demand and low supply of fishmeal due to overexploitation of fisheries resources have resulted in a dramatic increase in the price of this ingredient. Olive flounder (Paralichthys olivaceus) commercial feed contains approximately 60% fishmeal and limited success has been achieved in identifying sustainable alternative protein sources for this species. Methods: An on-farm feeding trial was conducted to compare a basal diet containing 65% as the control (CONT) with two experimental diets replacing 10% of fishmeal by animal protein (AP10) or 20% of fishmeal by animal and plant protein (APP20). Sub-adult olive flounder averaging 327 ± 9.3 g (mean±SD) were fed one of the three diets in triplicate groups for 16 weeks. Results: Weight gain, specific growth rate, feed efficiency, protein efficiency ratio, and survival were not significantly different among fish fed all the experimental diets (P > 0.05). Also, non-specific immune responses (superoxide dismutase and lysozyme activity), serum biochemical parameters, and intestinal villi length were not significantly different among fish fed all the experimental diets (P > 0.05). Conclusions: Therefore, based on growth performance, non-specific immune responses, serum biochemical parameters, and intestinal histology, dietary animal and plant protein mixtures could replace up to 20% of fishmeal in the diet of sub-adult olive flounder.
Choi, Wonsuk,Hamidoghli, Ali,Bae, Jinho,Won, Seonghun,Choi, Youn Hee,Kim, Kang-Woong,Lee, Bong-Joo,Hur, Sang-Woo,Han, Hyonsob,Bai, Sungchul C. The Korean Society of Fisheries and Aquatic Scienc 2020 Fisheries and Aquatic Sciences Vol.23 No.8
Background: High demand and low supply of fishmeal due to overexploitation of fisheries resources have resulted in a dramatic increase in the price of this ingredient. Olive flounder (Paralichthys olivaceus) commercial feed contains approximately 60% fishmeal and limited success has been achieved in identifying sustainable alternative protein sources for this species. Methods: An on-farm feeding trial was conducted to compare a basal diet containing 65% as the control (CONT) with two experimental diets replacing 10% of fishmeal by animal protein (AP<sub>10</sub>) or 20% of fishmeal by animal and plant protein (APP<sub>20</sub>). Sub-adult olive flounder averaging 327 ± 9.3 g (mean±SD) were fed one of the three diets in triplicate groups for 16 weeks. Results: Weight gain, specific growth rate, feed efficiency, protein efficiency ratio, and survival were not significantly different among fish fed all the experimental diets (P > 0.05). Also, non-specific immune responses (superoxide dismutase and lysozyme activity), serum biochemical parameters, and intestinal villi length were not significantly different among fish fed all the experimental diets (P > 0.05). Conclusions: Therefore, based on growth performance, non-specific immune responses, serum biochemical parameters, and intestinal histology, dietary animal and plant protein mixtures could replace up to 20% of fishmeal in the diet of sub-adult olive flounder.