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정상인에서 전기 및 자기 자극을 이용한 설 근육의 전기생리학적 평가
조은미,류종현,안성환,조경원,임건한,김진호,김후원 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.1
Background: Abnormality of lingual muscles is clinically common. But its exact clinical assessment is quite difficult. Evaluation of motor power of the lingual muscles and their neural pathway is limited because of anatomical inaccessibility and individual variation of subjective symptoms. Transcranial magnetic stimulation (TMS) of the human motor cortex is a non-invasive tool to assess the functional integrity of the fast conducting central motor pathways and electrical stimulation of lingual nerve is a conventional method of peripheral nerve conduction. Therefore both study will be helpful to understanding of pathophysiology of lingual abnormality. Until now there is no such report in Korea. This study was conducted to acquire the easier method and normal control values of Korean subjects. Method: We recorded the motor responses from the lingual muscles of 32 healthy subjects (22 men, 10 women) by focal cortical TMS with a circular coil. Motor potentials were recorded by means of surface electrodes applied on the both side of the tongue, following TMS several centimeters lateral from the vertex and parietooccipital cortex and peripheral electrical stimulation of the 12th cranial nerve at the lateral 1/3 point of the line between the midline and angle of mandible. Results: During moderate motor activation, majority of maximal motor response were obtained 4-6cm lateral to the vertex with similar latencies. And the responses from magnetic stimulation of the intracranial segment of hypoglossal nerve were discarded because of difficulty to obtain and unsatisfactory reproducibility. The latency of motor evoked potentials in right cortical stimulation was 10.08 ± 1.17 msec and in left stimulation 10.04 ± 1.32 msec. The amplitudes in right 2.15 ± 1.02, left 2.09 ± 1.11 mV. The latencies electric hypoglossal nerve stimulation were 2.42 ± 0.34 in right, 2.49 ± 0.35 msec in left side. The amplitudes were 2.90 ± 2.37 in right, 2.43 ± 1.86 mV in left side. Central conduction times as calculated by subtracting the response latencies obtained by magnetic and electric stimulation are right 7.65 ± 1.19, left 7.55 ± 1.35 msec. There was no significant difference between man and woman, Conclusion: The method may be efficient, noninvasive, painless, and easy reproduced. With more extensive application to various neurological disorders, it comes close to being an ideal clinical conduction study technique for this cranial nerve.
이주영,류수진,박예진,황순호,이마세,김인종,김동현,김신규 慶熙大學校 1996 論文集 Vol.25 No.-
Sythesis of β-naphthol derivatives and their anti-tumor activity were investigated. Binaphthol 1 obtained from β-naphthol by oxidative C-C bond formation(phenoloxydation) was converted into its derivatives. Treatment of 1 with POCl_3 followed by aziridine introduction gave phosphoryl aziridine 3. Also, diaziridine 5 was obtained from 1 by chlorination and successive aziridine introdution. Typical chemical transformation of 1 to obtain ester-type afforded compound 7 and 8. Compound 5 was the most effective derivative of the tested compounds on their anti-tumor activity.
Choi, Seok,Cho, Kyung-Won,Reu, Jong-Hyun,Kim, Jun-Soo,Mun, Hyun-Sik,Kim, Myung-Young,Park, Kwang-Chul,Heo, Gwang-Sik,Chang, Sung-Jong,Yeum, Cheol-Ho,Yoon, Pyung-Jin,Jun, Jae-Yeoul The Korean Society of Pharmacology 2004 The Korean Journal of Physiology & Pharmacology Vol.8 No.3
The interstitial cells of Cajal (ICCs) are the pacemaker cells in gastrointestinal tract and generate electrical rhythmicity in gastrointestinal muscles. Therefore, ICC may be modulated by endogenous agents such as neurotransmitter, hormones, and prostaglandins (PGs). In the present study, we investigated the effects of prostaglandins, especially $PGE_2$, on pacemaker currents in cultured ICCs from murine small intestine by using whole-cell patch clamp techniques. ICCs generated spontaneous slow waves under voltage-clamp conditions and showed a mean amplitude of $-452{\pm}39\;pA$ and frequency of $18{\pm}2$ cycles/min (n=6). Treatments of the cells with $PGE_2$ $(1\;{\mu}M)$ decreased both the frequency and amplitude of the pacemaker currents and increased the resting currents in the outward direction. $PGE_2$ had only inhibitory effects on pacemaker currents and this inhibitory effect was dose-dependent. For characterization of specific membrane EP receptor subtypes, involved in the effects of $PGE_2$ on pacemaker currents in ICCs, EP receptor agonists were used: Butaprost $(1\;{\mu}M)$, $EP_2$ receptor agonist, reduced the spontaneous inward current frequency and amplitude in cultured ICCs (n=5). However sulprostone $(1\;{\mu}M)$, a mixed $EP_1$ and $EP_3$ agonist, had no effects on the frequency, amplitude and resting currents of pacemaker currents (n=5). SQ-22536 (an inhibitor of adenylate cyclase; $100\;{\mu}M$) and ODQ (an inhibitor of guanylate cyclase; $100\;{\mu}M$) had no effects on $PGE_2$ actions of pacemaker currents. These observations indicate that $PGE_2$ alter directly the pacemaker currents in ICCs, and that the $PGE_2$ receptor subtypes involved are the $EP_2$ receptor, independent of cyclic AMP- and GMP-dependent pathway.
Seok Choi,Kyung Won Cho,Jong-Hyun Reu,Jun-Soo Kim,Hyun Sik Mun,Myung Young Kim,Kwang Chul Park,Gwang Sik Heo,Sung Jong Chang,Cheol Ho Yeum,Pyung Jin Yoon,Jae Yeoul Jun 대한생리학회-대한약리학회 2004 The Korean Journal of Physiology & Pharmacology Vol.13 No.1
The interstitial cells of Cajal (ICCs) are the pacemaker cells in gastrointestinal tract and generate electrical rhythmicity in gastrointestinal muscles. Therefore, ICC may be modulated by endogenous agents such as neurotransmitter, hormones, and prostaglandins (PGs). In the present study, we investigated the effects of prostaglandins, especially PGE<SUB>2</SUB>, on pacemaker currents in cultured ICCs from murine small intestine by using whole-cell patch clamp techniques. ICCs generated spontaneous slow waves under voltage-clamp conditions and showed a mean amplitude of 452⁑39 pA and frequency of 18⁑2 cycles/min (n=6). Treatments of the cells with PGE<SUB>2</SUB> (1μM) decreased both the frequency and amplitude of the pacemaker currents and increased the resting currents in the outward direction. PGE<SUB>2</SUB> had only inhibitory effects on pacemaker currents and this inhibitory effect was dose-dependent. For characterization of specific membrane EP receptor subtypes, involved in the effects of PGE<SUB>2</SUB> on pacemaker currents in ICCs, EP receptor agonists were used: Butaprost (1μM), EP<SUB>2</SUB> receptor agonist, reduced the spontaneous inward current frequency and amplitude in cultured ICCs (n=5). However sulprostone (1μM), a mixed EP<SUB>1</SUB> and EP<SUB>3</SUB> agonist, had no effects on the frequency, amplitude and resting currents of pacemaker currents (n=5). SQ-22536 (an inhibitor of adenylate cyclase; 100μM) and ODQ (an inhibitor of guanylate cyclase; 100μM) had no effects on PGE<SUB>2</SUB> actions of pacemaker currents. These observations indicate that PGE<SUB>2</SUB> alter directly the pacemaker currents in ICCs, and that the PGE<SUB>2</SUB> receptor subtypes involved are the EP<SUB>2</SUB> receptor, independent of cyclic AMP- and GMP-dependent pathway.