• 제목/요약/키워드: plant physiology

검색결과 442건 처리시간 0.029초

Effects of tianeptine on symptoms of fibromyalgia via BDNF signaling in a fibromyalgia animal model

  • Lee, Hwayoung;Im, Jiyun;Won, Hansol;Nam, Wooyoung;Kim, Young Ock;Lee, Sang Won;Lee, Sanghyun;Cho, Ik-Hyun;Kim, Hyung-Ki;Kwon, Jun-Tack;Kim, Hak-Jae
    • The Korean Journal of Physiology and Pharmacology
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    • 제21권4호
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    • pp.361-370
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    • 2017
  • Previous reports have suggested that physical and psychological stresses may trigger fibromyalgia (FM). Stress is an important risk factor in the development of depression and memory impairments. Antidepressants have been used to prevent stress-induced abnormal pain sensation. Among various antidepressants, tianeptine has been reported to be able to prevent neurodegeneration due to chronic stress and reverse decreases in hippocampal volume. To assess the possible effect of tianeptine on FM symptoms, we constructed a FM animal model induced by restraint stress with intermittent cold stress. All mice underwent nociceptive assays using electronic von Frey anesthesiometer and Hargreaves equipment. To assess the relationship between tianeptine and expression levels of brain-derived neurotrophic factor (BDNF), cAMP response element-binding protein (CREB), and phosphorylated cAMP response element-binding protein (p-CREB), western blotting and immunohistochemistry analyses were performed. In behavioral analysis, nociception tests showed that pain threshold was significantly decreased in the FM group compared to that in the control group. Western blot and immunohistochemical analyses of medial prefrontal cortex (mPFC) and hippocampus showed downregulation of BDNF and p-CREB proteins in the FM group compared to the control group. However, tianeptine recovered these changes in behavioral tests and protein level. Therefore, this FM animal model might be useful for investigating mechanisms linking BDNF-CREB pathway and pain. Our results suggest that tianeptine might potentially have therapeutic efficacy for FM.

Lonicera Flower의 항산화활성과 LDL 산화 억제효과 및 혈전용해능에 관한 연구 (Screening of Anti-atherosclerotic Effect of Lonicera Flower by Antioxidative and Anti-thrombotic Mechanism)

  • 주신탁;이민자;이혜숙;정현정;김혁;김재은;박선동;박원환
    • 동의생리병리학회지
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    • 제22권6호
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    • pp.1509-1517
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    • 2008
  • The flowers and buds of Lonicera Flower (LF), are used in Korean herbal medicine for latent-heat-clearing, antipyretic, detoxicant and anti-inflammatory ailments. This plant is used worldwide for the treatment of many types of inflammatory disease including respiratory infections, diabetes mellitus, rheumatoid arthritis and play an important role in immune reaction. These pharmaceutical effects of LF looks like to be related to its antioxidant capacity and phytochemicals containing in LF. In this study, the antioxidant activity of extract from LF was studied in vitro methods by measuring the antioxidant activity by TEAC, measuring the scavenging effects on reactive oxygen species (ROS) [superoxide anion, hydroxyl radical] and on reactive nitrogen species (RNS) [nitric oxide and peroxynitrite] as well as measuring the inhibitory effect on $Cu^{2+}$ induced human LDL oxidation and the inhibitory effect on collagen induced platelet aggregation. The LF extracts were found to have a potent scavenging activity, as well as an inhibitory effect on LDL oxidation and on platelet aggregation. In conclusion, the LF extracts have anti-oxidative and anti-atherosclerotic effects in vitro system, which can be used for developing pharmaceutical drug against oxidative stress and atherosclerosis.

국내 흰개미(Reticulitermes speratus kyushuensis Morimoto)에 의한 토양의 화학적 특성 변화 (Changes in Chemical Property of Soil Affected by Termites (Reticulitermes speratus kyushuensis Morimoto) in Korea)

  • 성세하;김근기;홍창오;박현철
    • 한국환경과학회지
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    • 제26권6호
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    • pp.789-795
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    • 2017
  • Termites (Isoptera) are classified into approximately 3,106 species. In Korea, only one species has been identified, which is Reticulitermes speratus kyushuensis Morimoto. The termite, a social insect, is known to play an important role in nutrient cycling of the ecosystem, although some species of termites are well-known pests attacking wooden structures or any plant materials. However, there is a lack of research about termites in Korea, including aspects such the taxonomy, physiology, and ecology of termites. This study was carried out to provide valuable basic data on the ecological role of termites in an ecosystem in Korea for the future studies. For the experiments, soil and termite samples were randomly collected from Mt. Hwajang located in Jikdong-ri, Eonyang-eup, Ulju-gun, Korea between October 5 and 30, 2015. Analysis results showed that there were no significant differences in soil chemical properties between the soil samples just after air-drying and one year elapsed without any treatment. The treated soil with termites showed significantly higher than the soil without termite treatment. Chemical properties of total nitrogen, organic matter, available phosphate, pH, Calcium(Ca), Potassium(K) and Magnesium(Mg) in soil treated with termites were $1.11{\pm}0.3gkg^{-1}$, $43.3{\pm}12.4gkg^{-1}$, $27.4{\pm}2.9mgkg^{-1}$, $4.56{\pm}0.2$, $0.82{\pm}0.2cmol_ckg^{-1}$, $3.18{\pm}1.4cmol_ckg^{-1}$, $1.73{\pm}1.1cmol_ckg^{-1}$, respectively. The values of soil property of without termite treatment were $0.56{\pm}0.1gkg^{-1}$, $30.5{\pm}3.1gkg^{-1}$, $24.0{\pm}4.7 mgkg^{-1}$, $4.09{\pm}0.1$, $0.71{\pm}0.2cmol_ckg^{-1}$, $2.88{\pm}1.5cmol_ckg^{-1}$, $1.30{\pm}0.7cmol_ckg^{-1}$, respectively. These results suggest that inhabitation of termites could improve soil chemical properties in an ecosystem.

은행나무의 잎끝마름병에 미치는 $SO_2$ 의 영향 (Effect of $SO_2$ on Leaf Tip Blight of Ginkgo biloba caused by Coniothyrium sp.)

  • 강연지;박소홍;이두형;배공형
    • 한국환경농학회지
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    • 제18권2호
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    • pp.179-184
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    • 1999
  • 대기오염과 병충해발생과의 관계를 규명하고자 은행나무에 $SO_2$ 가스를 처리한 후, 잎끝마름병균을 접종하여 식물의 생리·생화학적인 변화를 조사하였다. ${\mu}l/l$$SO_2$ 가스를 하루 8시간씩 7일간 은행나무에 처리한 결과 Chlorosis등의 가시피해는 나타나지 않았으나, 광합성이 대조구에 비해 40%가량 감소되고, $CO_2$ 이용효율과 수분이용효율이 감소되는 현상을 보였다. 가스처리 후 병원균을 상처접종시키고 42일 뒤 SI와 SFI의 발병도를 조사한 결과 SI가 SFI에 비해 3배 가량 빠르게 병이 진전되어 있었다. 병원균의 먹이가 되는 당의 함량은 대조구, SFI, SI간에 유의성을 보일 만큼의 차이는 보이지 않았으나, 광합성은 SI가 SFI에 비해 11%가량 저하되었다. 광합성이 저하되었음에도 불구하고 당의 함량이 유지되었으므로 탄소 고정관계를 알아본 결과 $CO_2$ 이용효율이 저하되지 않았음을 알 수 있었다. 이와 함께 수분이용효율이 SI에서 SFI에 비해 13.2% 증가되었다. 이상의 결과를 종합해 보면, 이온유출량 등으로 보아 $SO_2$ 가스처리로 인해 식물이 연약해져 병원균에 대한 저항력이 낮아졌고, 수분이용효율의 증가로 인해 탄소 고정이 활발하게 이루어짐으로써 당이 원활히 합성되는 한편 내부적인 변화로 인해 합성된 당의 전류가 억제되어 잎에 당이 축적되었기 때문에 SI의 발병도가 훨씬 높았던 것으로 생각된다.

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농산물 중 thidiazuron 잔류분석법 개선 및 잔류실태 조사 (Enhancement of Analytical Method for Thidiazuron Residues and Monitoring of its Residues in Agricultural Commodities)

  • 도정아;이미영;박혜진;권지은;조윤제;장문익;오재호;홍진환
    • 한국환경농학회지
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    • 제32권3호
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    • pp.207-213
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    • 2013
  • Thidiazuron은 1976년 Plant Physiology 발표를 통해 생장조정제로 알려진 이후, 현재 우리나라에서도 생장조정제로 수박과 참외의 착과 증진 및 참다래의 과실비대 촉진, 포도의 과립 비대 증진 및 착립 증진 등을 위해 등록되어 사용되고 있다. Thidiazuron의 분석법은 식품공전에 수재되어 있으나, 등재 당시의 기술 이용, 일부 시험 대상 품목에 대한적용 등으로, 최근의 잔류허용기준 설정 품목의 증가와 분석기기 및 기술 발달을 반영하여 검증된 분석법으로 개선코자 하였다. 더불어, 개발된 분석법을 활용하여, thidiazuron의 사용이 허가되어 있는 수박, 키위, 포도를 포함한 국민 다소 비 식품 17품목에 대한 잔류실태조사도 수행하였다. 개발된 분석법의 회수율은, 현미 89.2~91.2 %, 고추 87.2~92.1 %, 감자 76.4~86.9 %, 수박 91.2~95.7 %, 키위 86.5~88.5 %, 포도 89.5~94.0 % 였으며, 반복 회수율 간 변이계수는 10 % 이하였다. 또한 개발된 분석법으로 우리나라에서 유통되고 있는 다소비 농산물 쌀, 상추, 사과 등 17품목 358건에 대해 농약 잔류실태를 조사한 결과 모든 시료에서 thidazulon은 검출되지 않았다.

기상환경과 병해충 발생 및 그 대책 (Meteorological Condition and Pest Management)

  • 현재선
    • 한국작물학회지
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    • 제27권4호
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    • pp.361-370
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    • 1982
  • The effects of climatic factors on organisms lire variable and complex, and it, however, can be interpreted in terms of those on the distribution and those on the population densities. The distribution of an organism may largely be determined by the temperatures, except some temporal organisms which are depended on the air mass movements. Population density of an organism is determined by various climatic factors, such as previous winter temperature, temperature of growing season and rainfall. The start of growing season of the rice plants has been shifted to earlier since last decade in Korea. This may mean that the overall climatic condition during the growing season might be considerably different from those in past years, and such a difference in climatic conditions might have close relation with the recent status of the diseases and insect pests through direct effects on the physiology and population dynamics of the organisms, as well as through on the biotic associations of the pest organisms. The white back planthopper and brown planthopper have become the key insect pests in Korea in recent years. They are migratory and have high reproductive pontentials and more generations than average residential insects. The synchronization of the migrants and physiological condition of the rice plants seems to be the important factors in relation to the recent outbreaks of these insects; the high reproductive rate can be obtained with the growth stage of rice being 30-50 days after transplanting. The modication of the microclimate associated with high plant density and some other introduced new cultural techniques also have some relation with the outbreak. The key diseases of the rice are the blast disease, sheath blight and the bacterial leaf blight. For the rice blast, the seedling blast and leaf blast during the early growing season and the neck blast, have become more serious, the former may be related to hotbed nursery and the later may be related to the high humidity in early August, and synchronization of the heading time which has been shifted to early part from middle or late part of August. In general, for the rice diseases, the development of the new races have been the most serious which are largely resulted from the introduction of the new varieties, but it also seems to be related with the prolonged periods of the favorable condition associated with the shifted growing seasons. In general, the diseases and insect pest problems have become much more variable and complex, and control measures should be based on the thorough knowledge of the ecology of the pest organisms, that is, effects of various environmental factors on the disease cycle; spore release, spore deposition, infection, colonization and sporulation of the disease organisms, and those on the development, reproductive potentials, dispersal, age specific responses of the insects. The well organized real-time pest management systems, such as alfalfa weevil management system developed at the Purdue University in U.S., is the prime importance for the implementation of the pest management principles.

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$CCl_4$로 급성 간손상을 유도한 백서에서 인삼엽과 경추출물의 간기능 개선과 항산화 작용 (Improvement of Liver Function and Suppressed Lipid Peroxidation of Extract from Ginseng Folium and Stem in Acute $CCl_4$ Intoxicated Rats)

  • 이민경;박성혜;서의석;김기영
    • 동의생리병리학회지
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    • 제18권5호
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    • pp.1485-1489
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    • 2004
  • Panax ginseng is the one of best famous phytochemical plant in the world and it's various positive effects such as antioxidant, regulation of immunity are very well known. In this study, we investigated primary the cell viability and morphological change and secondary an antioxidative effect and liver function improvement of extract from Ginseng folium and stem in CCl4 intoxicated rats. The NCTC cell line were used for cell viability and sirius red staining before the animal experiment. The female Sprague-Dawley rats (90-100g) were divided into 3 groups (Normal, AC: CCl₄ treated group, GFS: CCl₄+ extract of Ginseng folium and stem treated group) and acute liver damage was developed by one time administration of CCl₄ mixture (0.5㎖/rat). The liver tissue and sera were collected and used for quantitative measurement of enzyme activity (AST, ALT, ALP, BUN), MDA and Hyp. As a result, cell viability in GFS treated group (in concentration of 3.33-33.33㎎ GFS/200㎕ medium) was 180.9-241.0% significantly and dose dependently higher than in control group. And potential state of cell growth and differentiation and no criteria of cytoplasm lysis and nucleus breaking were observed in control and GFS group. The parameters of liver function (AST and ALP) in sera of GFS group showed significantly 93% and 67.6% lower than AC group (p<0.005-0.05). And the level of ALT and BUN showed fast similar in AC group and GFS group. The concentration of MDA in liver was decreased 576.5% significantly in GFS group when compared with AC group (p<0.005). The content of Hyp in GFS group is merely lower than in AC group. In conclusion, the water extract of Ginseng folium and stem such as Ginseng radix may be possessed the antioxidative effect and improvement of liver function in CCl₄ intoxicated rats.

렛트 복강 비만세포와 화학항원 유도 알레르기 마우스에서 황금과 금은화 추출물의 항가려움 및 항염증 상승효과 (Synergic Anti-Pruritic and Anti-Inflammatory Effects of Scutellariae Radix plus Flos Loncerae Extracts in Rat Peritoneal Mast Cell and Chemical Antigen-Induced Mice)

  • 목지예;전인화;김현수;신준호;박용균;장선일
    • 동의생리병리학회지
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    • 제27권1호
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    • pp.83-91
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    • 2013
  • Pruritus is a unpleasant symptom in the skin that provokes the act of or desire to scratch. Mast cells are important effector cells in allergic reactions such as pruritus and inflammation. The purpose of this study was undertaken to investigate the synergic anti-pruritic and anti-inflammatory effects of Scutellariae Radix (SB) plus Flos Loncerae (FL) extracts in rat peritoneal mast cells (RPMCs), pruritogen-induced scratching mice and 2,4-dinitrofluorobenzene (DNFB)-induced allergic mice. We investigated the effect of SB, FL and SB plus FL extracts on the production of tumor necrosis factor (TNF)-${\alpha}$, interleukin (IL)-$1{\beta}$, and histamine in RPMCs, on the scratching behavior in ICR mice, and skin clinical serverity and inflammatory mediators in DNFB-induced allergic hairless mice. RPMCs stimulated with PMA plus A23187 or compound 48/80 significantly increased TNF-${\alpha}$, IL-$1{\beta}$ or histamine production compared with media control. However, TNF-${\alpha}$ IL-$1{\beta}$ or histamine levels increased by PMA plus A23187 or compound 48/80 treatment were significantly inhibited by SB, FL in a dose-dependent manner. Especially, SB plus FL pretreatment had a synergic inhibitory effects on stimulator-induced cytokines (TNF-${\alpha}$ and IL-$1{\beta}$) and histamine production. Moreover, SB plus FL administration had a synergic inhibitory effects on the scratching behavior induced by pruritogen (compound 48/80, histamine, serotonin, substance P) in ICR mice. Furthermore, SB plus FL administration had a synergic inhibitory effects on skin damage, inflammatory mediators, leukocyte and mast cell infiltration induced by DNFB in hairless mice. These results suggest that SB plus FL administration has a potential use as a medicinal plant for treatment against itching and inflammation-related skin disease.

Involvement of ROS in Curcumin-induced Autophagic Cell Death

  • Lee, Youn-Ju;Kim, Nam-Yi;Suh, Young-Ah;Lee, Chu-Hee
    • The Korean Journal of Physiology and Pharmacology
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    • 제15권1호
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    • pp.1-7
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    • 2011
  • Many anticancer agents as well as ionizing radiation have been shown to induce autophagy which is originally described as a protein recycling process and recently reported to play a crucial role in various disorders. In HCT116 human colon cancer cells, we found that curcumin, a polyphenolic phytochemical extracted from the plant Curcuma longa, markedly induced the conversion of microtubule-associated protein 1 light chain 3 (LC3)-I to LC3-II and degradation of sequestome-1 (SQSTM1) which is a marker of autophagosome degradation. Moreover, we found that curcumin caused GFP-LC3 formation puncta, a marker of autophagosome, and decrease of GFP-LC3 and SQSTM1 protein level in GFP-LC3 expressing HCT116 cells. It was further confirmed that treatment of cells with hydrogen peroxide induced increase of LC3 conversion and decrease of GFP-LC3 and SQSTM1 levels, but these changes by curcumin were almost completely blocked in the presence of antioxidant, N-acetylcystein (NAC), indicating that curcumin leads to reactive oxygen species (ROS) production, which results in autophagosome development and autolysosomal degradation. In parallel with NAC, SQSTM1 degradation was also diminished by bafilomycin A, a potent inhibitor of autophagosome-lysosome fusion, and cell viability assay was further confirmed that cucurmin-induced cell death was partially blocked by bafilomycin A as well as NAC. We also observed that NAC abolished curcumin-induced activation of extracelluar signal-regulated kinases (ERK) 112 and p38 mitogen-activated protein kinases (MAPK), but not Jun N-terminal kinase (JNK). However, the activation of ERK1/2 and p38 MAPK seemed to have no effect on the curcumin-induced autophagy, since both the conversion of LC3 protein and SQSTM1 degradation by curcumin was not changed in the presence of NAC. Taken together, our data suggest that curcumin induced ROS production, which resulted in autophagic activation and concomitant cell death in HCT116 human colon cancer cell. However, ROS-dependent activation of ERK1/2 and p38 MAPK, but not JNK, might not be involved in the curcumin-induced autophagy.

Chronic Administration of Baicalein Decreases Depression-Like Behavior Induced by Repeated Restraint Stress in Rats

  • Lee, Bombi;Sur, Bongjun;Park, Jinhee;Kim, Sung-Hun;Kwon, Sunoh;Yeom, Mijung;Shim, Insop;Lee, Hyejung;Hahm, Dae-Hyun
    • The Korean Journal of Physiology and Pharmacology
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    • 제17권5호
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    • pp.393-403
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    • 2013
  • Baicalein (BA), a plant-derived active flavonoid present in the root of Scutellaria baicalensis, has been widely used for the treatment of stress-related neuropsychiatric disorders including depression. Previous studies have demonstrated that repeated restraint stress disrupts the activity of the hypothalamic-pituitary-adrenal (HPA) axis, resulting in depression. The behavioral and neurochemical basis of the BA effect on depression remain unclear. The present study used the forced swimming test (FST) and changes in brain neurotransmitter levels to confirm the impact of BA on repeated restraint stress-induced behavioral and neurochemical changes in rats. Male rats received 10, 20, or 40 mg/kg BA (i.p.) 30 min prior to daily exposure to repeated restraint stress (2 h/day) for 14 days. Activation of the HPA axis in response to repeated restraint stress was confirmed by measuring serum corticosterone levels and the expression of corticotrophin-releasing factor in the hypothalamus. Daily BA administration significantly decreased the duration of immobility in the FST, increased sucrose consumption, and restored the stress-related decreases in dopamine concentrations in the hippocampus to near normal levels. BA significantly inhibited the stress-induced decrease in neuronal tyrosine hydroxylase immunoreactivity in the ventral tegmental area and the expression of brain-derived neurotrophic factor (BDNF) mRNA in the hippocampus. Taken together, these findings indicate that administration of BA prior to the repeated restraint stress significantly improves helpless behaviors and depressive symptoms, possibly by preventing the decrease in dopamine and BDNF expression. Thus, BA may be a useful agent for the treatment or alleviation of the complex symptoms associated with depression.