• 한국작물학회지
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• 제43권2호
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• pp.77-82
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• 1998

Aerenchyma development in rice (Oryza sativa L.) roots is quite important for adaptation to waterlogged or reduced soil conditions. Anatomical observations were carried out to clarify the development of schizogenous and lysigenous aerenchyma in elongating crown roots of rice. The crown roots of 3rd and 4th phytomer were taken from rice plants of the 8th leaf stage grown by hydroponic culture. The schizogenous intercellular spaces in the cortex of crown root tip were observed using a light microscope with semi ultra-thin sections and the lysigenous aerenchyma in mature tissue of crown root were observed using a cryo scanning electron microscope (cryo-SEM) with freezing fracture method. The schizogenous intercellular spaces in the root tip exist obviously in the middle portion of cortical cell layers close to the root-root cap junction, but not in root cap, stele and outer cell layers of cortex. The air spaces were formed at the junction of four neighbouring cells of inner cortex in the transverse sections, and between longitudinal cell layer connected along the root axis. Although many of those spaces were filled with liquid, some spaces seem to exist as air spaces. The lysigenous aerenchyma in the cortex, which hardly filled with liquid, emerged at 3-4 cm segment from the root tip and increased toward the basal region of root axis. The developing process of lysigenous aerenchyma was primarily separation of a radial row of cells caused by the shrinking and collapsing of cortical cells and then formation of septa along the radial cell rows by the fusion of cell wall with each other. These results suggest that the schizogenous and lysigenous aerenchyma playa role as a passage for the movement of oxygen into the root tip region where oxygen is required for respiration.

• Journal of Pharmaceutical Investigation
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• 제8권1호
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• pp.6-16
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• 1978

We obtained 4 kinds of extract fraction from Acanthopanacis Radicis Cortex and studied on the influence to the blood pressure of rabbit. These 4 fractions were obtained as follows; Fraction I was insoluble fraction by 99% ethanol from 80% methanol extract of Acanthopanacis Radicis Cortex, fraction II, precipitated fraction by ether from 99% ethanol soluble fraction of 80% methanol extract of Acanthopanaacis Radicis Cortex, fraction III, no precipitated fraction by ether from 99% ethanol soluble fraction of above 80% methanol extract and fraction IV, water extract of Acanthopanacis Radicis Cortex. All of fractions, when administered into ear-vein of rabbit, produced fall of blood pressure. Among these 4 fractions, although fraction III was not only the most potent but had the greatest efficacy, we observed the mechanism of hypotensive action of Acanthopanacis Radicis Cortex, making use of fraction II which was thought as a comparatively pure fraction. Hypotensive action of fraction II (APF II) was not affected by vagotominization but markedly inhibited by atropine. Pretreatment of bethanidine showed a tendency to weaken the depressor action of APF II, although it was not a significant result, but diphenhydramine did not influence APF II action. Phentolamine, guanethidine and chlorisondamine inhibited significantly the hypotensive action of APF II. APF II elicited the potentiation of norepinphrine pressor action dependent on the time-factor whereas it did not influence angiotesin pressor action. It is seemed that APF II exhibited hypotensive action, causing peripheral muscarinic-effect and centrally induced sympatholytic action.

• 한국의학물리학회지:의학물리
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• 제15권3호
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• pp.128-133
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• 2004

기능적 자기공명영상을 이용하여 진동자의 자극에 따른 감각 피질의 반응에 대하여 연구하였다 주로 40 Hz 이하의 주파수에 반응하는 촉각소체의 혈류반응을 조사하기 위하여 8, 15, 그리고 25 Hz의 주파수를 사용하였다. 사용되고 있는 진동자의 한계를 극복한 공기의 압력을 이용하여 진동할 수 있는 진동자를 특수 제작하였다. 예측한 바와 같이 감각 피질의 촉각소체 부위가 주파수에 따라 반응하는 모습을 볼 수 있었다. 주파수 대 반응 면적을 각 pixel의 개수와 signal percent change로 분석하여 주파수가 증가할수록 signal percent change의 분포는 넓어지고 더 많은 pixel들이 반응한다는 것을 알 수 있었다.

• Korean Journal of Acupuncture
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• 제22권2호
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• pp.75-87
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• 2005

Objective : The purpose of this study is to observe the effect of Herbal-cupuncture with Acanthopanacis cortex Herbal-Acupuncture Solution (AC-HAS) on rheumatoid arthritis. Methods : The author performed several experimental items : it is paw thickness, weight of spleen, expression of $CD4^+,\;CD8^+,\;B220^+$ in the spleen, production of IL-6, $TNF-{\alpha}$, and examination of histology. Results : The obstain results are summarized s follows. 1. Treatment group were significantly inhibited the incidence of arthritis, hind paw edema and index of arthritis of CIA mice. 2. Treatment group were significantly decreased splenetic weight 3. The number of $CD4^+,\;CD8^+,\;B220^+$ activated cells were significantly inhibited in treatment group. 4. Treatment group were significantly decreased the amout of IL-4, $TNF-{\alpha}$ of CIA mice.. 5. Treatment group were expressed form of new bone, synoviumin and new margine in histology imperison to control group. Conclusions : Taking all these observations into account, AC-HAS injection is considered to be effective in treating rheumatoid arthritis and put to practical use in future rheumatoid arthritis clinic.

• The Korean Journal of Physiology and Pharmacology
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• 제14권3호
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• pp.151-156
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• 2010

This study was performed to investigate the role of glutamate neurotransmitter system on gastrointestinal motility in a middle cerebral artery occlusion (MCAO) model of rats. The right middle cerebral artery was occluded by surgical operation, and intestinal transit and geometric center as a parameter of gastrointestinal motility and expression of c-Fos protein in the insular cortex and cingulate cortex were measured at 2 and 12 h after MCAO. Intestinal transit was $66.3{\pm}7.5%$ and $62.3{\pm}5.7%$ 2 and 12 h after sham operation, respectively, and MCAO significantly decreased intestinal transit to $39.0{\pm}3.5%$ and $47.0{\pm}5.1%$ at 2 and 12 h after the occlusion, respectively (p<0.01). The geometric center was $5.6{\pm}0.4$ and $5.2{\pm}0.9$ at 2 and 12 h after sham operation, respectively, and MCAO significantly decreased geometric center to $2.9{\pm}0.8$ and $3.0{\pm}0.3$ at 2 and 12 h after the occlusion, respectively (p<0.01). In control animals, injection of atropine decreased intestinal transit to $35.9{\pm}5.2%$, and injection of glutamate NMDA receptor antagonist, MK-801, decreased intestinal transit to $28.8{\pm}9.5%$. Pretreatment with MK-801, a glutamate NMDA receptor antagonist, in the MCAO group decreased intestinal transit to $11.8{\pm}3.2%$, which was significantly decreased compared to MCAO group (p<0.01). MCAO markedly increased the expression of c-Fos protein in the insular cortex and cingulate cortex ipsilateral to the occlusion 2 h after MCAO, and pretreatment with MK-801 produced marked reduction of c-Fos protein expression compared to MCAO group (p<0.01). These results suggest that modulation of gastrointestinal motility after MCAO might be partially mediated through a glutamate NMDA receptor system.

• Applied Microscopy
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• 제30권1호
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• pp.11-20
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• 2000

성인 남성의 모발에서 정상 모간과 자연상태에서 손상된 모간의 외부형태와 미세구조적 변화를 광학현미경과 주사 및 투과전자현미경으로 관찰하였다. 정상 모간은 모소피층, 모피질, 모수질 등의 3부분으로 구성되어 있었다. 모소피층은 $5\sim7$개의 모소피세들이 중첩되어 모피질과 모수질을 둘러싸고 있고, 길게 신장되어 모피질을 둘러싸고 있는 소피세포의 두께는 약 $0.4{\mu}m$로 확인되었다. 또한, 이들 세포사이에는 약 $25{\mu}m$의 세포사이 막복합체가 관찰되었다. 모피질은 잘 발달되어 각질화세포(cornified cell)들로 치밀하게 채워져 있었고, 각질화세포는 직경이 약 $0.5\sim0.8{\mu}m$인 구형 또는 타원형의 macrofibril로 구성되어 있었으며, 이들은 약 8 nm 두께의 가는 microfibril이 동심원상의 규칙적인 형태로 배열되어 있었다. 그리고 macrofibril사이에는 약 $0.5{\mu}m$ 크기의 직경을 가진 구형의 melanin과립들이 고르게 산재되어 관찰되었다. 모수질은 공기가 채워져 있었고, 직경이 약 $16{\mu}m$의 구형의 형태로 모간의 전체 직경에 1/5정도를 차지하고 있었다. 풍화에 의해 손상된 모간은 모소피층이 박리되어 있었으며, 모피질세포의 세포질도 손상되어 melanin과립들이 표면에 노출되어 있는 것인 확인되었다. 조직표본상에서 모소피층의 박리과정은 모소피 사이에 공포가 형성되고, 이어서 모소피의 가장자리가 떨어져 나가고, 박리되지 많은 부위는 절단되었다. 모소피가 탈락되어 모피질이 노출된 부위에서는 각질화세포내에 존재하는 macrofibril이 각각 분리되고, 인접된 macrofibril사이에 공기가 채워지게 어 모간의 풍화과정은 더욱 촉진되었다. 그리고 노출된 macrofibril사이에서 탈락 직전의 melanin과립들이 산재되어 관찰되었다.

• The Korean Journal of Physiology and Pharmacology
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• 제19권6호
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• pp.523-531
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• 2015

Serotonin [5-hydroxytryptamine (5-HT)] regulates synaptic plasticity in the visual cortex. Although the effects of 5-HT on plasticity showed huge diversity depending on the ages of animals and species, it has been unclear how 5-HT can show such diverse effects. In the rat visual cortex, 5-HT suppressed long-term potentiation (LTP) at 5 weeks but enhanced LTP at 8 weeks. We speculated that this difference may originate from differential regulation of neurotransmission by 5-HT between the age groups. Thus, we investigated the effects of 5-HT on apha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR)-, ${\gamma}$-aminobutyric acid receptor type A (GABAAR)-, and N-methyl-D-aspartic acid receptor (NMDAR)-mediated neurotransmissions and their involvement in the differential regulation of plasticity between 5 and 8 weeks. AMPAR-mediated currents were not affected by 5-HT at both 5 and 8 weeks. GABAAR-mediated currents were enhanced by 5-HT at both age groups. However, 5-HT enhanced NMDAR-mediated currents only at 8 weeks. The enhancement of NMDAR-mediated currents appeared to be mediated by the enhanced function of GluN2B subunit-containing NMDAR. The enhanced GABAAR- and NMDAR-mediated neurotransmissions were responsible for the suppression of LTP at 5 weeks and the facilitation of LTP at 8 weeks, respectively. These results indicate that the effects of 5-HT on neurotransmission change with development, and the changes may underlie the differential regulation of synaptic plasticity between different age groups. Thus, the developmental changes in 5-HT function should be carefully considered while investigating the 5-HT-mediated metaplastic control of the cortical network.

• 동아시아식생활학회지
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• 제18권4호
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• pp.618-623
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• 2008

기능성 식품 및 기능성 화장품으로 활용 가능한 소재를 개발하기 위한 목적으로 자외선 차단 효과, 항산화 효과, 미백효과 등을 측정한 결과는 다음과 같다. 1. 자외선 차단 효과는 두충 추출물은 $280{\sim}210\;nm$에서 단삼은 $270{\sim}220\;nm$에서 나타내는 것으로 보아 자외선 차단용 화장품 원료로 사용 시 UV-C영역의 자외선을 흡수하는 목적으로 사용할 수 있을 것이며, 진피는 $400{\sim}210\;nm$에서 천궁은 $380{\sim}220nm$의 거의 자외선 파장의 전 영역에서 흡수를 나타내었다. 2. DPPH 라디칼에 대한 소거능은 천궁 추출물은 79.0%, 두충 추출물은 74.2%, 진피 추출물은 40.4%, 단삼 추출물은 19.4%의 저해율 순서로 천궁 추출물이 가장 높은 전자공여능을 나타내었다. 3. Superoxide dismutase(SOD) 유사활성율은 단삼 추출물은 21.9%, 진피 추출물은 18.3%, 두충 추출물은 11.7% 순으로 나타내었으나, 천궁 추출물은 반응 과정에서 부유물이 생성되어 정확한 값을 측정할 수 없었다. 4. Xanthine oxidase 저해 활성을 측정한 결과, 단삼 추출물은 79.3%, 천궁 추출물은 71.9%, 두충 추출물은 57.5% 순으로 xanthine oxidase 저해 활성도가 매우 높은 것으로 나타났다. 5. Tyrosinase 저해 활성도는 천궁 추출물은 59.5%, 단삼추출물은 22.8%, 진피 추출물은 27.5%, 두충 추출물은 12.4% 순으로 나타내었다. 이상의 결과를 보면 자외선 차단 효과는 진피와 천궁 추출물이 좋은 자외선 차단용 원료로 사용할 수 있을 것이며, 항산화 효과는 네 가지 추출물의 특성을 고려하여 적당히 혼합한 혼합물, 미백 효과는 천궁 추출물을 사용하면 좋은 기능성 식품 및 기능성 화장품 원료로 사용 가능한 것으로 사료된다.

• 한국식품영양과학회지
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• 제42권4호
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• pp.527-533
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• 2013

해동피 항산화 물질을 추출하기 위한 열수 추출조건을 냉장처리 여부, 추출온도 및 추출시간을 달리하여 검토하였다. 이러한 조건을 달리하여 추출된 추출물의 총 폴리페놀 화합물의 함량, DPPH radical 소거능 및 HRSA를 측정하였다. 그 결과 총 폴리페놀 함량은 냉장처리 후 추출온도 $95^{\circ}C$, 추출 15시간에서 $612{\mu}g/mL$로써 가장 높았다. DPPH radical 소거능은 냉장처리 후 추출온도 $95^{\circ}C$, 추출 15시간에서 가장 높은 78.8%이었고 대조구인 ascorbic acid의 70.2%보다 높게 나타났다. HRSA는 냉장처리 후 추출온도 $95^{\circ}C$, 추출 15시간에서 ascorbic acid 56.6%보다 높은 69.0%로 가장 높게 나타났다. 따라서 이상의 열수추출에 의한 해동피의 항산화성 활성 및 그 최적 조건을 확립한 것으로 향후 해동피의 기능성식품으로서의 이용개발을 위한 중요한 자료로 이용될 수 있음을 보여 주고 있다.

• 한방안이비인후피부과학회지
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• 제22권2호
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• pp.1-18
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• 2009

Objective : Moutan Cortex (the root bark of Paeonia suffruticosa Andr.) is widely used in oriental medicine as a remedy for inflammation. However, as yet there is no clear explanation of how MC(Moutan Cortex) affects the production of inflammatory cytokine. This study was to determine the effects of Essence extracted MC on the mast cell-mediated inflammatory responses. Method : We observed the effect of MC on compound 48/80-induced histamine release of rat peritoneal mast cells and the effect of administering MC on PCA in rat. We measured the amount of inflammatory cytokine production induced by the phorbol myristate acetate (PMA) plus calcium ionophore(A23187) in the human mast cell line (HMC-1) incubated with various concentrations of MC. The TNF-$\alpha$ protein levels were analysised by Western blot. The TNF-$\alpha$, IL-6 and IL-8 secreted protein levels were measured by the ELISA assay. The TNF-$\alpha$, IL-6 and IL-8 mRNA levels were measured by the RT-PCR analysis. NF-$\kappa$B, phospho-I$\kappa$B and MAPKs were exmined by Western blot analysis. The NF-$\kappa$B promoter activity was examined by luciferase assay. Result : 1. Enzyme immunoassay indicated that MC suppressed histamine secretion of rat peritoneal mast cells. 2. In PCA dependent on IgE, MC had anti-allergic effect of the internal surface of rat skin. 3. Western blot indicated that MC decreased TNF-$\alpha$ protein levels. 4. ELISA indicated that MC decreased TNF-$\alpha$, IL-6 but MC had no significant effect on IL-8 in HMC-1 cells. 5. RT-PCR indicated that MC decreased TNF-$\alpha$, IL-8 but MC had no significant effect on IL-6 in HMC-l cells. 6. Western blot indicated that MC suppressed the induction of MAPKs, NF-$\kappa$B & phospho-I$\kappa$B activity in HMC-1 cells. 7. Luciferase assay indicated that MC suppressed the PMA plus A23187-induced NF-$\kappa$B promoting activityin HMC-1 cells. Conclusion : In this study, we have found that MC is an inhibitor of NF-$\kappa$B, MAPKs & cytokines on the mast cell-mediated inflammatory responses.