Gyu Tae Chang

Prof. Gyu Tae Chang

orcid

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2017 in Evidence-Based Complementary and Alternative Medicine
Verified
Journal Article
Open access
PDF file
MBMiran Bang
Miran Bang
Sun Haeng LeeSun Haeng Lee
Sun Haeng Lee
SCSeung-Hun Cho
Seung-Hun Cho
SYSun-Ae Yu
Sun-Ae Yu
KKKibong Kim
Kibong Kim
SMSang Yeon Min
Sang Yeon Min
Objective. To summarize and evaluate the efficacy and safety of herbal medicines used for the treatment of autism spectrum disorder (ASD) in children. Methods. Thirteen electronic databases were searched from their inception to November 2016. Randomized controlled trials (RCTs) that assessed the efficacy of herbal medicines alone or in combination with other Traditional Chinese Medicine treatments for ASD in children were included. The Cochrane Risk of Bias Tool was used and other data analyses were performed using RevMan (Version 5.3). Results. Ten RCTs involving 567 patients with ASD were included for qualitative synthesis. In conjunction with conventional therapy, herbal medicines significantly improved the Childhood Autism Rating Scale (CARS) score, but the results of effects on total effective rate (TER) were different between the included studies. The use of herbal medicines with integrative therapy improved the CARS score and TER. In the studies that documented adverse events, no serious events were associated with herbal medicines. Conclusions. The efficacy of herbal medicines for the treatment of ASD appears to be encouraging but was inconclusive owing to low methodological quality, herbal medicine diversity, and small sample size of the examined studies.

11 January 2018 in Evidence-Based Complementary and Alternative Medicine
Verified
Journal Article
Open access
PDF file
BLBoram Lee
Boram Lee
JLJihong Lee
Jihong Lee
JCJin-Hong Cheon
Jin-Hong Cheon
HSHyun Kyung Sung
Hyun Kyung Sung
SCSeung-Hun Cho
Seung-Hun Cho
GCGyu Tae Chang
Gyu Tae Chang
Objectives. We aimed to summarize and critically evaluate the available evidence regarding the efficacy and safety of acupuncture for children with autism spectrum disorder (ASD). Methods. We searched 13 databases for studies published up to December 2016. Randomized controlled trials (RCTs) evaluating the efficacy of acupuncture for children with ASD were included. Outcome measures were the overall scores on scales evaluating the core symptoms of ASD and the scores for each symptom, such as social communication ability and skills, stereotypies, language ability, and cognitive function. Effect sizes were presented as mean differences (MD). Results. Twenty‐seven RCTs with 1736 participants were included. Acupuncture complementary to behavioral and educational intervention significantly decreased the overall scores on the Childhood Autism Rating Scale (CARS) (MD −8.10, 95% CI −12.80 to −3.40) and the Autism Behavior Checklist (MD −8.92, 95% CI −11.29 to −6.54); however, it was unclear which of the ASD symptoms improved. Acupuncture as a monotherapy also reduced the overall CARS score. The reported adverse events were acceptable. Conclusions. This review suggests that acupuncture may be effective and safe for pediatric ASD. However, it is not conclusive due to the heterogeneity of the acupuncture treatment methods used in the studies.

12 November 2017 in Phytotherapy Research
Verified
Journal Article
Closed access
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DLDonghun Lee
Donghun Lee
Sun Haeng LeeSun Haeng Lee
Sun Haeng Lee
JSJungbin Song
Jungbin Song
HJHee‐Jung Jee
Hee‐Jung Jee
SCSung Ho Cha
Sung Ho Cha
GCGyu Tae Chang
Gyu Tae Chang

26 January 2016 in Evidence-Based Complementary and Alternative Medicine
Verified
Journal Article
Open access
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Sun Haeng LeeSun Haeng Lee
Sun Haeng Lee
SKSung Chul Kwak
Sung Chul Kwak
DKDong Kwan Kim
Dong Kwan Kim
SPSang Woug Park
Sang Woug Park
HKHyun Soo Kim
Hyun Soo Kim
GCGyu Tae Chang
Gyu Tae Chang
The present study was to evaluate the effects of Huang Bai, Zhi Mu, Mai Ya, and Xia Ku Cao on hormone using the GT1–7 and GH3 cells. The GT1–7 and GH3 cell lines were incubated with DW; DMSO; and 30, 100, or 300 μg/mL of one of the four extract solutions in serum‐free media for 24 hours. The MTT assay was performed to determine the cytotoxicity of the four herbs. The GT1–7 and GH3 cells were incubated in DW, estradiol (GT1–7 only), or noncytotoxic herb solutions in serum‐free medium for 24 hours. A quantitative RT‐PCR and western blot were performed to measure the GnRH expression in GT1–7 cells and GH expression in GH3 cells. Huang Bai, Zhi Mu, Xia Ku Cao, and Mai Ya inhibited the GnRH mRNA expression in GT1–7 cells, whereas Huang Bai enhanced GH mRNA expression in GH3 cells. Additionally, Xia Ku Cao inhibited GnRH protein expression in GT1–7 cells and Huang Bai promoted GH protein expression in GH3 cells. The findings suggest that Huang Bai can delay puberty by inhibiting GnRH synthesis in the hypothalamus while also accelerating growth by promoting GH synthesis and secretion in the pituitary.

2 May 2017 in BMC Complementary and Alternative Medicine
Verified
Journal Article
Open access
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SCSung-Min Cho
Sung-Min Cho
Sun Haeng LeeSun Haeng Lee
Sun Haeng Lee
DLDonghun Lee
Donghun Lee
JLJi Hong Lee
Ji Hong Lee
GCGyu Tae Chang
Gyu Tae Chang
JLJin Yong Lee
Jin Yong Lee
Yukmijihwangtang (YJT) is a traditional Korean medicine that has been used to treat kidney-yin deficiency symptoms such as dizziness and tinnitus. In addition, because it is also thought to nourish kidney-yin, it has been used to treat short stature from congenital deficiency. This study evaluated the effects of YJT on longitudinal bone growth in rats. Female adolescent rats were randomly assigned to groups that received distilled water (per os [p.o.] twice a day; control), recombinant human growth hormone (rhGH; 20 μg/kg, subcutaneous [s.c.] once a day), or two different doses of YJT (100 or 300 mg/kg, p.o. twice a day). In each group, treatment was maintained for 4 days. Rats were injected intraperitoneally with 5-bromo-2’-deoxyuridine (BrdU; 50 mg/kg) to label proliferating chondrocytes on days 2 – 4. Tetracycline hydrochloride (20 mg/kg) was injected intraperitoneally to form fluorescent bands on the growth plates on day 3 for measuring the longitudinal bone growth rate. Expression of insulin-like growth factor-1 (IGF-1) and bone morphogenetic protein-2 (BMP-2) in the growth plate was identified using immunohistochemistry. There was a significant increase in the rate of bone growth in the 300 mg/kg YJT group (523.8 ± 23.7 μm/day; P < 0.05) compared to the control group (498.0 ± 23.8 μm/day), while the 100 mg/kg YJT group exhibited a non-significant increase. The number of BrdU-positive cells in the chondrocytes of the rhGH-treated group exhibited a significant increase (103.8 ± 34.2 cells/mm2) compared to that of the control group (70.3 ± 19.7 cells/mm2), while the 300 mg/kg YJT group had a non-significant increase. Additionally, IGF-1 and BMP-2 were highly expressed in the growth plate in the 300 mg/kg YJT and rhGH groups. YJT increased the longitudinal bone growth rate by stimulating chondrocyte proliferation with increasing increments of local IGF-1 and BMP-2 expression. Based on these findings, YJT may be a therapeutic candidate for the treatment of growth retardation during adolescence.

15 January 2020 in BMC Complementary Medicine and Therapies
Verified
Journal Article
Open access
PDF file
JLJihong Lee
Jihong Lee
Sun Haeng LeeSun Haeng Lee
Sun Haeng Lee
GCGyu Tae Chang
Gyu Tae Chang
Background: Although a variety of patient-reported outcome measures (PROMs) for children have been developed, there is no pediatric PROM specific to Korean medicine (KM) that is validated by experts in the field. The aim of this study was to collate the opinions of specialists in KM pediatrics on the development of a generic PROM that can be used by Korean medical doctors to assess the health status of children.Methods: A three-round Delphi survey was conducted to determine the level of consensus on the development of a new PROM. Delphi questionnaires were sent by e-mail to 91 KM pediatricians on January 24, 2018. The Delphi questionnaire was composed of four sections: conceptualization, construction, items, and sources of content for a PROM. A nine-point Likert scale was used, and if more than two-thirds of the panels agreed or disagreed with a given sentence, they were considered to have reached a consensus. A draft of a PROM for the pediatric field of KM was developed in accordance with the preliminary conceptual framework.Results: Out of 91 experts, 18 finished three rounds of the Delphi survey. The experts reached a consensus on the necessity of a KM pediatric PROM for measuring various areas including child health, and using Likert scales with a recall period of 3 months. They also agreed on specific items and sources of content. A new draft of a health questionnaire for KM pediatrics was developed based on the Delphi consensus. It contains 44 items covering 7 domains: i) functions of the digestive system, ii) functions of the respiratory system, iii) mental functions, iv) skin functions, v) pain, vi) functions of the metabolic and endocrine systems, and vii) demographic details.Conclusions: This research represents the first step in developing a health questionnaire for the pediatric field of KM. The questionnaire can be used in clinical and research settings after verifying several types of validity and reliability.