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Biomedical subjects

Hyun-Dae Shin

Publications and source records attributed to Hyun-Dae Shin.

12 recordsLinked to original sources
PubMed2006

Arthroscopic hybrid double-row rotator cuff repair.

A Beath pin is drilled on the greater tuberosity under arthroscopy using an anterior cruciate ligament guide. The suture anchor is inserted in the lateral aspect of the footprint. Sutures are then passed through the margins of the rotator cuff tear and tied with sliding knot. One strand of tied suture anchor is passed into the bony trough. One passed strand and the other strand are then tied with a non-sliding knot on the greater tuberosity. The strength of cuff fixation does not only rely on the quality of the bone, it restores the footprint contact area of rotator cuff, and reduces the use of suture anchors to the minimum in this method.

Arthroscopy↗
PubMed2005

Korean and Caucasian overweight premenopausal women have different relationship of body mass index to percent body fat with age.

The aim of the study was to investigate in premenopausal women whether the relationship between percentage body fat (PBF) and body mass index (BMI; in kg/m2) differs between Korean Asians (Ko-As) living in Seoul, South Korea, and Caucasians (Ca) living in New York City. Healthy premenopausal women (50 Ko-As; 38 Ca), ages 22-50 yr, were studied. Weight, height, and PBF by dual-energy X-ray absorptiometry were measured. Total body dual-energy X-ray absorptiometry data were collected using GE-Lunar systems (Prodigy-Korea and DPXL-New York), and all scan analyses were performed by one technician in New York. Similar soft tissue phantoms were used for daily instrument calibrations at both sites. The relationship between PBF and BMI was assessed by multiple regression analysis with race, age, reciprocal of BMI (1/BMI), and a race-by-age interaction as the final independent variables. Race (P = 0.003) and 1/BMI (P < 0.001) were significantly related to PBF in this model. A significant race-by-age interaction (P = 0.039) indicated that the slope of the lines for PBF vs. age differed between Ko-As and Ca. This study demonstrates in a Ko-As sample that the BMI-fat relationship differs significantly from that in a comparable group of Caucasian women. Investigators who use BMI as an index of fatness should be aware of the well documented differences in the relationship of BMI and fatness across race/ethnic groups.

Adipose Tissue↗
PubMed2004

Treatment of femoral shaft fractures in young children: comparison between conservative treatment and retrograde flexible nailing.

Outcomes of pediatric femoral fractures treated with traction followed by cast (conservative treatment) were compared with flexible nailing treatment. Fifty-one femoral fractures (24 conservative, 27 nail) from 46 patients were studied retrospectively. Four cases of angular deformities greater than 10 degree were observed from the conservative treatment and none from the nailing group. Conservative treatment showed a wider variance of leg length discrepancy (LLD) and four cases showed severe LLD greater than 10 mm. The nailing group had no discrepancy. Retrograde flexible nailing may result in more reliable outcomes than conservative treatment for femoral fractures.

Bone Remodeling↗
PubMed2003

Protective effect of shenqi-wan against H2O2-induced apoptosis in hippocampal neuronal cells.

The present study investigated whether Shenqi-wan possesses a protective effect against hydrogen peroxide (H2O2)-induced apoptosis of the hippocampal cell line HiB5. Through morphological and biochemical analyses, it was demonstrated that HiB5 cells treated with H2O2 exhibited several apoptotic features, while cells pre-treated with Shenqi-wan prior to H2O2 exposure showed a decrease in the occurrence of apoptosis. In addition, a patch clamp study revealed that Shenqi-wan inhibited profoundly N-methyl-D-aspartic acid (NMDA) receptor-activated ion current in acutely dissociated hippocampal CA1 neurons. These results suggest that Shenqi-wan may exert its protective effect against H2O2-induced apoptosis via inhibition of NMDA receptors in hippocampal neuronal cells.

Antioxidants↗
PubMed2003

Effects of Paeonia radix on 5-hydroxytryptamine synthesis and tryptophan hydroxylase expression in the dorsal raphe of exercised rats.

Paeonia radix is the root of Paeonia japonica MIYABE, a perennial plant classified in the family Paeoniaceae. In the present study, the effects of Paeonia radix on performance in treadmill exercise, and 5-hydroxytryptamine (5-HT) synthesis and tryptophan hydroxylase (TPH) expression in the dorsal raphe were investigated. Time to exhaustion in treadmill exercise was increased and exercise-induced increases in 5-HT synthesis and TPH expression in the dorsal raphe were shown to be suppressed by Paeonia radix treatment; 5-HT synthesis and TPH expression were inhibited by Paeonia radix treatment under resting conditions as well. In sum, treatment with Paeonia radix, inhibiting 5-HT synthesis and TPH expression, may bring about reduced fatigue, both during exercise and the resting state.

Animals↗
PubMed2003

Red ginseng inhibits exercise-induced increase in 5-hydroxytryptamine synthesis and tryptophan hydroxylase expression in dorsal raphe of rats.

Red ginseng has been used as an ergogenic aid for endurance exercise. In this study, the effect of aqueous extract of Red ginseng on the endurance in treadmill exercise and 5-hydroxytryptamine (serotonin) synthesis and tryptophan hydroxylase expression in the dorsal raphe of rats were studied. Rats receiving Red ginseng showed increased time to exhaustion for treadmill running, and Red ginseng treatment inhibited exercise-induced increases in 5-hydroxytryptamine synthesis and tryptophan hydroxylase expression in the dorsal raphe. These results suggest that the suppressive effect of Red ginseng on serotonin level during exercise is a possible ergogenic mechanism of Red ginseng.

Animals↗
PubMed2002

Effects of acupuncture on the 5-hydroxytryptamine synthesis and tryptophan hydroxylase expression in the dorsal raphe of exercised rats.

In the present study, the effects of acupuncture on the endurance treadmill exercise, serotonin (5-hydroxytryptamine, 5-HT) synthesis, and tryptophan hydroxylase (TPH) expression in the dorsal raphe nuclei were investigated. Acupunctural stimulation were bilaterally inserted into the locus of Zusanli in each hind leg for 20 min. Onset of exhaustion time on the treadmill running was increased significantly by acupunctural stimulation and exercise-induced increments of the 5-HT synthesis and TPH expression in the dorsal raphe were suppressed by acupunctural stimulation. Based on the results, it can be suggested that the suppressive effects of acupunctural stimulation on the 5-HT synthesis and TPH expression in the dorsal raphe during exercise is one of ergogenic mechanisms of acupuncture.

Acupuncture Therapy↗
PubMed2002

Protective effects of Wuyaoshunqisan against H2O2-induced apoptosis on hippocampal cell line HiB5.

Oxidative stress has been implicated in the pathogenesis of different neurodegenerative disorders. To investigate the protective effects of Wuyaoshunqisan against H2O2-induced apoptosis in the central nervous system, the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, the terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end-labeling (TUNEL) method, flow cytometric analysis, and the DNA fragmentation assay were performed on cells of the hippocampal cell line HiB5. Through the morphological and biochemical analyses, it was shown that HiB5 cells treated with H2O2 exhibit classical apoptotic features, while the occurrence of such changes is reduced in cells pre-treated with Wuyaoshunqisan prior to H2O2 exposure.

Animals↗
PubMed2002

Effects of Puerariae radix on cell proliferation and nitric oxide synthase expression in dentate gyrus of alcohol-intoxicated Sprague-Dawley rats.

Traditionally, Puerariae radix had been used for the treatment of alcohol-related problems. In this study, effects of Puerariae radix on cell proliferation and nitric oxide synthase expression in the dentate gyrus of alcohol-intoxicated Sprague-Dawley rats were investigated via 5-bromo-2'-deoxyuridine (BrdU) immunohistochemistry and nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) histochemistry. Alcohol administration was shown to inhibit the numbers of both BrdU-positive and NADPH-d-positive cells, while Puerariae radix treatment was shown to increase those numbers. It is possible that nitric oxide, which might play an important role in the regulation of cell proliferation, is a major target of the toxic effects of alcohol.

Alcoholic Intoxication↗