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Cervical Disc Herniation as a Cause of Brown-S$\acute{e}$quard Syndrome
Choi, Kyeong-Bo,Lee, Choon-Dae,Chung, Dai-Jin,Lee, Sang-Ho The Korean Neurosurgical Society 2009 Journal of Korean neurosurgical society Vol.46 No.5
The possible causes of Brown-S$\acute{e}$quard Syndrome (BSS) have been frequently observed with spinal trauma and extramedullary spinal tumors, but the cervical disc herniation to cause BSS is rare. The authors present five cases of patients who were diagnosed with BSS resulting from cervical disc herniation, and the results of the literature in view of their distinctive symptoms and clinical outcomes. Postoperatively, the patients showed complete or almost complete recovery from their motor and sensory deficits. On the basis of our cases, it is important to diagnose it early by cervical magnetic resonance imaging, especially in the absence of the typical symptoms of cervical disc herniation or other obvious etiology of extremity numbness. Immediate surgical treatment is also essential for a favorable functional neurological recovery.
Determination of Vitamin B₁₂ (Cyanocobalamin) in Fortified Foods by HPLC
Youn Ju Choi,Jae Hee Jang,Hye Kyung Park,Yong Eui Koo,In Kyeong Hwang,Dai Byung Kim 한국식품영양과학회 2003 Preventive Nutrition and Food Science Vol.8 No.4
This study was conducted to develop an HPLC method for determining vitamin B₁₂ in fortified foods which has typically been determined by microbiological assays according to AOAC and Korean Food Code approved methods. Vitamin B₁₂ (cyanocobalamin) was determined by reversed-phase HPLC with a triple column and UV/VIS dectector (550 nm) using the column switching technique after extraction with 5 mM potassium phosphate solution by sonication without a clean-up procedure. The recovery of spiked samples and limit of detection (LOD) by HPLC were 78.6~107.5% and 2 ppb (μg/kg), respectively. The LOD of the microbiological assay (MBA) was much lower than that of HPLC. The concentrations of vitamin B₁₂ analyzed in all tested samples (n=12) confirmed compliance with declared label claims. The range of recovery ratio by the HPLC method when compared to the microbiological assay was 76.2~140.0%. There was not significant difference between the HPLC and MBA methods (p<0.01) with r=0.9791 and linear regression y=0.9923x-0.04. The HPLC method for determining vitamin B₁₂ using the column-switching technique appears to be suitable for determining vitamin B₁₂ concentrations above 1 μg/100 g in fortified foods.
Lee, Tae-Kyeong,Park, Joon Ha,Ahn, Ji Hyeon,Kim, Hyunjung,Song, Minah,Lee, Jae-Chul,Kim, Jong Dai,Jeon, Yong Hwan,Choi, Jung Hoon,Lee, Choong Hyun,Hwang, In Koo,YAN, Bing-Chun,Won, Moo-Ho,Kang, Il Jun Elsevier 2019 Chinese journal of natural medicines Vol.17 No.6
<P><B>Abstract</B></P> <P>To examine the effects of <I>Populus tomentiglandulosa</I> (PT) extract on the expressions of antioxidant enzymes and neurotrophic factors in the cornu ammonis 1 (CA1) region of the hippocampus at 5 min after inducing transient global cerebral ischemia (TGCI) in gerbils, TGCI was induced by occlusion of common carotid arteries for 5 min. Before ischemic surgery, 200 mg·kg<SUP>−1</SUP> PT extract was orally administrated once daily for 7 d. We performed neuronal nuclear antigen immunohistochemistry and Fluoro-Jade B staining. Furthermore, we determined <I>in situ</I> production of superoxide anion radical, expression levels of SOD1 and SOD2 as antioxidant enzymes and brain-derived neurotrophic factor (BDNF) and insulin-like growth factor I (IGF-I) as neurotrophic factors. Pretreatment with 200 mg·kg<SUP>−1</SUP> PT extract prevented neuronal death (loss). Furthermore, pretreatment with 200 mg·kg<SUP>−1</SUP> PT extract significantly inhibited the production of superoxide anion radical, increased expressions of SODs and maintained expressions of BDNF and IGF-I. Such increased expressions of SODs were maintained in the neurons after IRI. In summary, pretreated PT extract can significantly increase levels of SODs and protect the neurons against TGCI, suggesting that PT can be a useful natural agent to protect against TGCI.</P>
최윤주(Youn Ju Choi),장재희(Jae Hee Jang),박혜경(Hye Kyung Park),박건상(Kun Sang Park),구용의(Yong Eui Koo),황인경(In Kyeong Hwang),김대병(Dai Byung Kim) 한국식품영양과학회 2004 한국식품영양과학회지 Vol.33 No.2
기존의 미생물학적 분석법의 많은 단점을 보완하고자 식품중 판토텐산의 HPLC 분석법을 시도하였다. 추출용매는 20 mM potassium phosphate를 사용하였고, PDA spectrum 결과 최대 흡광도를 200 ㎚에서 분석하였다. HPLC 방법에 의한 판토텐산의 평균 회수율은 83.5~109.6%이었으며 검출 한계는 0.5 ppm이었다. 또한 HPLC 분석법의 신뢰성을 검증하고자 미생물학적 분석법도 병행했는데 그 결과 회수율은 87.0~118.3%이었고 검출한계는 0.000375 ppm으로서 미생물학적 분석법이 검출한계는 훨씬 낮았다. HPLC법이나 미생물학적 분석법(MBA)에서 대상식품중 판토텐산의 측정값은 13건의 시료에서 모두 표시값보다 높았다. 미생물학적 분석법(MBA)에 대한 HPLC 분석 회수율은 91.9~117.6%이었고, paired t-test 및 회귀분석결과, 두 방법 사이에는 유의적인 차이(p<0.01)가 없었으며, 상관관계(r = 0.9842, y =1.1428x-0.2269)가 양호하였다. 본 연구에 의해 개발된 HPLC 분석법은 기존의 미생물학적 분석법에 비하여 간단하면서 정확하여 분석의 효율성을 증대시킬 수 있으리라 기대된다. This study was conducted to develop an HPLC method for determining pantothenic acid in fortified foods which has typically been determined by microbiological assay (MBA) according to AOAC and Korean Food Code approved methods. Pantothenic acid was determined by reversed-phase ion-pair HPLC using UV absorption (200 ㎚) after extraction with 20 mM potassium phosphate solution by sonication. The recovery of spiked samples and detection limit (LOD) by HPLC were 83.5~109.6% and 0.5 ppm (㎎/㎏), respectively. The LOD of the microbiological assay (MBA) was much lower than that of HPLC. The concentrations of pantothenic acid analyzed in all tested samples (n=13) confirmed compliance with declared label claims. The range of recovery ratio by the HPLC method when compared to the microbiological assay was 91.9~117.6%. There was not significant difference (p<0.01) between the HPLC and MBA methods and the equation of the regression curve was y=1.1428x-0.2269 (r=0.9842). This proposed HPLC method for determining pantothenic acid appears to be suitable for determining pantothenic acid concentrations above 0.25 ㎎/100 g in fortified foods.
Kim, Heejung,Kim, Yu Kyeong,Lee, Ji Yoon,Choi, A Ruem,Kim, Dai Jin,Choi, Jung-Seok Elsevier 2019 Progress in neuro-psychopharmacology & biological Vol.95 No.-
<P><B>Abstract</B></P> <P>Internet gaming disorder (IGD) has become the subject of growing concern as an addictive behavior and has been compared with substance/non-substance-related addiction. Although IGD show clinical impairments and social dysfunction, neurobiological alterations in IGD have not been clearly elucidated. We used <SUP>18</SUP>F-fluorodeoxyglucose PET to investigate differences in glucose metabolism and metabolic connectivity in young men [thirty-six patients with IGD, twenty-six patients with alcohol use disorder (AUD) and thirty-nine healthy controls (HC)].</P> <P>Compared with the HC, IGD showed hypometabolism in the anterior cingulate cortex (ACC), temporal, frontal, parietal and striatum and AUD exhibited hypometabolism in the occipital, temporal and parietal lobule. Furthermore, IGD showed negative correlations between the ACC and game duration and between the orbitofrontal cortex and impulsivity. Also, IGD had lower metabolic connectivity between temporal and limbic regions and between the motor area and occipital region. And AUD showed greater metabolic connectivity between the orbitofrontal and parietal regions, and between the somatosensory or parietal and temporal regions, but lower metabolic connectivity in the fronto-striatal or fronto-limbic regions. Our results provide evidences that hypometabolism and altered metabolic connectivity in IGD might be related to the abnormal sensory function by longtime gaming and dysfunction of impulsive/motivational states.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We assessed with PET in patients with internet gaming disorders (IGD) or alcohol use disorder (AUD). </LI> <LI> Addiction duration was associated with hypometabolism in IGD. </LI> <LI> Abnormal metabolism and different metabolic connectivity were observed in IGD and AUD. </LI> </UL> </P>
Park, Joon Ha,Park, Chan Woo,Ahn, Ji Hyeon,Choi, Soo Young,Shin, Myoung Cheol,Cho, Jun Hwi,Lee, Tae-Kyeong,Kim, In Hye,Cho, Jeong Hwi,Lee, Jae-Chul,Kim, Yang Hee,Kim, Young-Myeong,Kim, Jong-Dai,Tae, H Elsevier 2017 Chemico-biological interactions Vol.278 No.-
<P><B>Abstract</B></P> <P>Hydroquinone (HQ), a major metabolite of benzene, exists in many plant-derived food and products. Although many studies have addressed biological properties of HQ including the regulation of immune responses and antioxidant activity, neuroprotective effects of HQ following ischemic insults have not yet been considered. Therefore, in this study, we examined neuroprotective effects of HQ against ischemic damage in the gerbil hippocampal cornu ammonis 1 (CA1) region following 5 min of transient cerebral ischemia. We found that pre- and post-treatments with 50 and 100 mg/kg of HQ protected CA1 pyramidal neurons from ischemic insult. Especially, pre- and post-treatments with 100 mg/kg of HQ showed strong neuroprotective effects against ischemic damage. In addition, pre- and post-treatments with 100 mg/kg of HQ significantly attenuated activations of astrocytes and microglia in the ischemic CA1 region compared to the vehicle-treated-ischemia-operated group. Briefly, these results show that pre- and post-treatments with HQ can protect neurons from transient cerebral ischemia and strongly attenuate ischemia-induced glial activation in the hippocampal CA1 region, and indicate that HQ can be used for both prevention and therapy of ischemic injury.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Low dose of hydroquinone (HQ), a tumorigenesis-inducing factor, does not show neuronal damage. </LI> <LI> Pre- and post-treatments with HQ significantly protects neurons from transient cerebral ischemia. </LI> <LI> Pre- and post-treatments with HQ significantly attenuate ischemia-induced gliosis. </LI> <LI> HQ could be a novel compound for postischemic therapy after cerebral ischemic insults. </LI> </UL> </P>
일부 한국 성인 남성의 생활습관 요인과 고혈압 유병 상태의 관련성
소위영 ( Wi Young So ),전태원 ( Tae Won Jun ),최대혁 ( Dai Hyuk Choi ),윤용진 ( Yong Jin Yoon ),김병민 ( Byung Min Kim ),서한교 ( Han Kyo Seo ),엄우섭 ( Woo Soeb Eom ),김경래 ( Kyeong Lae Kim ),박성태 ( Sung Tae Park ),장혁기 ( Hy 대한스포츠의학회 2009 대한스포츠의학회지 Vol.27 No.2
This study was to examine the relationship between lifestyle factors and hypertension in Korean men. The subjects were 1,938 men aged 20 to 79 yr who visited health promotion center for medical check during 2004-2008. The diagnosis of hypertension was defined by JNC7 report. The prevalence of hypertension was 23.3% in this study population. Multivariate logistic regression demonstrated that the odds ratio (95% CI) of hypertension across age groups were 2.40 (1.42-4.09) for forties, 3.64 (2.16-6.12) for fifties, 6.43 (3.80-10.88) for sixties, 5.80 (2.96-11.38) for seventies compared to the twenties. Also, compared with normal group, the odds ratio (95% CI) of hypertension in over-weight and obese groups were 2.94 (2.11-4.09) and 3.70 (2.70-5.07), respectively. The odds ratio (95% CI) of hypertension in those who were drinking one or two times per week and three times per week were 1.33 (1.03-1.72) and 2.33 (1.67-3.22), respectively, compared with non-drinker group. It is concluded that the significant risk factors of hypertension were age, BMI, and alcohol-drinking among Korean men. However, smoking, exercise, and diet were not related to the risk of hypertension.