• Molecular & Cellular Toxicology
• /
• 제4권1호
• /
• pp.72-77
• /
• 2008

The present study was undertaken to determine whether pioglitazone treatment influences on the agonist-induced vascular smooth muscle contraction and, if so, to investigate the related mechanism. The measurement of isometric contractions using a computerized data acquisition system was combined with molecular experiments. Pioglitazone decreased Rho-kinase activating agonist-induced contraction but not phorbol ester-induced contraction suggesting the least involvement of $Ca^{2+}$-independent thin filament regulation of contractility. Furthermore, pioglitazone decreased thromboxane $A_2$ mimeticinduced phosphorylation of MYPT1 at Thr855, the newly-highlighted site, instead of Thr696. In conclusion, this study provides the evidence and possible related mechanism concerning the vasorelaxing effect of pioglitazone as an antihypertensive on the agonist-induced contraction in rat aortic rings regardless of endothelial function.

• 생약학회지
• /
• 제27권1호
• /
• pp.53-57
• /
• 1996

To elucidate the activities of Uncaria Ramulus et Uncus, which has been used as anticonvulsant and antihypertensive in oriental region, the methanolic extract and its fractions were applied to inhibition of convulsion onset. The ethyl acetate fraction showed dose-dependent inhibitory activity against pentylenetetrazole-induced seizure.

• Biomolecules & Therapeutics
• /
• 제3권3호
• /
• pp.238-241
• /
• 1995

To investigate the effects of N-4-salicyloamide-2-amino-6-piperidinopyrimidine 3-oxide (SALMI) on the blood pressure, this study was carried out in rats, using ethanol as vehicle. When Salmi and its salt were administered into the rat by oral administration or i.v. injection, both of them decreased blood pressure. But when Salmi was administered not more than 200 mg/kg(oral) and 30 mg/kg(i.v.) and Salmi·HC1 was administered not more than 100 mg/kg(oral), they did not significantly influence on the depressor effects of blood pressure.

• 생약학회지
• /
• 제15권4호
• /
• pp.188-193
• /
• 1984

It was previously indicated that 'Samulanshintang' had been examined for effects of the anticonvulsive, antipyretic, analgesic, sedative and antispasmodic actions. In order to investigate the effect on the cardiovascular system and anemic rabbits induced by phenlhydrazine HCl, pharmacological studies have been carried out with extract. The results of this investigation were summarized as follows: The relaxation of bronchial smooth muscle and antihistamine action were recognized. Antihypertensive and vasodilating actions due to vascular smooth muscle relaxation were noted in frogs and rabbits. 'Samulanshintang' lowered the rate of anemia induced by phenylhydrazine and rapidly recovered from the anemia state.

• 한국잠사학회:학술대회논문집
• /
• 한국잠사학회 2003년도 제46회 춘계 학술연구 발표회
• /
• pp.51-51
• /
• 2003

The present study examined the effect of alcohol extract of Isaria sinclairii on blood pressure in spontaneously hypertensive rats (SHR). The blood pressure and heart rate were measured after treatment of alcohol extract of I. sinclairii by indirect tail cuff method and direct tn vivo model. Male SHR were treated with extracts for 2 or 4 weeks starting at 12 weeks of age. (omitted)

• Archives of Pharmacal Research
• /
• 제21권4호
• /
• pp.370-373
• /
• 1998

Ten substituted phenacyl derivatives of 4-hydroxypiperidine were synthesized and studied for their effects on the mean arterial blood pressure (MABP) in normotensive anaesthetized rats and smooth muscles contractions of isolated rabbit jejunum. Two derivatives caused fall in blood pressure at the dose of 10-20 mg/kg and one rise in blood pressure at the dose of 20 mg/kg. Two compounds exhibited biphasic response (hypotensive followed by hypertensive) and one gave triphasic response at 10 mg/kg dose. Rest of four derivatives were found devoid of any effect on mean arterial blood pressure up to the dose of 30 mg/kg. All the derivatives except two caused relaxant effect on the spontaneous contraction of rabbit jejunum at the dose range of 0.1 -2 mg/kg.

• Applied Biological Chemistry
• /
• 제43권4호
• /
• pp.247-252
• /
• 2000

한국 전통장류의 기능성 탐색 연구의 일환으로 청국장 발효과정 중 고혈압을 유발하는 angiotensin converting enzyme(ACE)의 저해 peptide를 분리하고 저해효과를 검토하였다. 청국장은 Bacillus subtilis CH-1023을 이용하여 제조하였고, $20^{\circ}C,\;30^{\circ}C,\;40^{\circ}C,\;50^{\circ}C,\;60^{\circ}C$에서 $0{\sim}72$시간동안 배양하면서 protein양, protease activity, ACE 저해율을 측정하고 저해활성을 가지는 peptide를 정제 후 아미노산조성을 분석하였다. 청국장의 발효시간이 경과함에 따라 protein 함량이 증가하여 $40^{\circ}C$, 60시간에서 최대를 나타낸 후 감소하였으며, 발효시간에 따른 protease activity와 ACE 저해율은 $40^{\circ}C$, 60시간에서 최대로 나타난 후 점차 감소하였다. 따라서 Bacillus subtilis CH-1023을 이용한 청국장 제조는 $40^{\circ}C$에서 60시간 배양이 최적의 배양조건이었다. 최적 발효조건에 따라 청국장을 제조한 후 20 mM sodium phosphate buffer(pH 7.0)를 가해 추출한 추출물을 Amicon YM-3 membrane filtration과 Sephadex G-10, G-25를 이용한 gel filtration으로 부분정제 하였다. 또한 정제한 peptide는 첨가함량이 높아질수록 저해활성은 높게 나타났으며, 0.5 mg 정도의 peptide 함량으로 94.3%의 저해율을 나타내었다. 정제한 peptide의 아미노산 조성은 histidine, alanine, phenylalanine 함량이 높은 것으로 나타났다.

• 한국식품영양과학회지
• /
• 제40권3호
• /
• pp.350-356
• /
• 2011

주름 미더덕(Styela plicata)을 8월부터 12월까지 매월 1회 채취하여 크기에 따라 큰 것(9.82~11.66 g)과 작은 것(0.93~2.21 g)으로 분류한 후 네 가지 용매(메탄올, 에탄올, 아세톤, 물)로 각각 추출 농축하여 추출물을 제조하였다. 각 추출물의 항산화 활성과 항고혈압 활성을 DPPH 라디칼 소거능과 환원력, 그리고 ACE 저해능으로 분석하였다. DPPH 라디칼 소거능은 11월에 채취된 큰 주름 미더덕의 아세톤 추출물이 가장 높았고, 환원력은 11월의 작은 미더덕의 아세톤 추출물이 가장 높았다. ACE 저해능은 물 추출물로만 측정하였는데, 11월에 채취된 큰 주름 미더덕의 추출물이 가장 높았다. 또한 주름 미더덕은 채취시기, 크기, 추출용매에 상관없이 거의 모든 시료에서 $H_2O_2$에 의해 유도된 백혈구의 DNA 손상을 억제하는 것으로 나타났으며 그 효과는 특히 8월 또는 9월에 채취한 큰 주름 미더덕이 월등함을 알 수 있었다. 또한 DNA 손상 억제에 있어서 추출 용매별 차이는 미미한 것으로 나타났으며 오히려 일부 물 추출물은 다른 용매 추출물에 비해 그 효과가 큰 것으로 나타나 끓이기 등의 일상 조리를 통한 주름 미더덕의 유효 성분 섭취를 기대할 수 있겠다. 이상의 결과로 채취시기, 크기, 용매에 따라 항산화, 항유전 독성 및 ACE 저해능의 차이가 있으며, 이는 주름 미더덕을 기능성 소재로 활용할 때 기초 자료로 활용될 수 있을 것이다.

• Applied Biological Chemistry
• /
• 제47권2호
• /
• pp.265-269
• /
• 2004

생리활성 보유 식물자원 발굴 및 이용을 위해 큰까치수영 지상부에 대한 항산화 및 항고혈압 활성을 검정하였으며 페놀화합물의 함량은 메탄올 추출물이 2.62%, 물 추출물이 0.23%였고 메탄올 추출물에서 얻어진 용매별 분획물 중에서는 에틸차세테이트 분획이 37.76%로 가장 함량이 높았다. Linoleic acid 자동산화에 대한 저해효과는 메탄올 추출물이 반응 6일째에 83%이상의 저해율을 보여 ${\alpha}-tocopherol$의 -2%보다 탁월하게 우수였으며 각 분획물 중에서는 핵산 및 에텔 분획이 매우 효과적으로 자동산화를 저해하였다. Superoxide anion 라디칼에 대헤서는 큰까치수영의 메탄올 추출물과 물 추출물이 $5{\sim}200\;{\mu}g/ml$의 농도에서 $86{\sim}109%$ 및 $96{\sim}122%$로 항산화제인 ascorbic acid의 $-4{\sim}69%$보다 월등하게 우수한 소거능을 보였으며 DPPH 라디칼에 대해서는 에틸아세테이트분획이 $26.8\;{\mu}g/ml$의 $RC_{50}$로 좋은 소거 효과를 나타내었다. ACE에 대한 저해활성은 $4,000\;{\mu}g/ml$의 농도에서 물 추출물(33%)보다는 메탄올 추출물(71%)이 효과적이었으며 분획물 중에서는 n-hexane fraction(133%), ether fraction(100%) 및 ethylacetate fraction(88%) 분획이 매우 효과적인 저해활성을 나타내었다.

• 대한한의학회지
• /
• 제26권1호
• /
• pp.115-122
• /
• 2005

Background and objective: Gastrodiae Rhizoma (GR), the rhizoma of Gastrodia elata BL., is one of the popular drugs to treat headache, dizziness, blackout, numbness of limbs, hemiplegia, facial paralysis, dysphrasia, and infantile convulsions. It has been reported that it provides an antihypertensive effect and lowers cerebrovascular resistance in animal experiments. However, there has been no data about these effects with human subjects. In this study, the author examined the effect of Gastrodiae water extracts on blood pressure and cerebrovascular reactivity in human subjects. Methods: We selected 16 normal volunteers, who were divided into 2 groups: Gastrodiae extract administration group and placebo (creamy powder) group. Using transcranial Doppler ultrasound, we monitored changes of mean flow velocity and breath-holding induced CO2 reactivity of middle cerebral artery in both groups. Mean blood pressure, heart rate and PETCO2 were measured using Compact Anesthesia Monitor. In both groups, all evaluation was performed during basal condition, and repeated at 30, 60, and 90 min after administration. Results: Gastrodiae extract decreased CO2 reactivity after administration, reaching the lowest level at 90 minutes $(-29.1\%\;vs.\;basal\;level)$, which showed significant difference compared with the placebo group (p = 0.004). In the placebo group, the pulse rates tended to decrease over time (at 90 minute, $-5.2\%$ vs. basal level) while in the Gastrodiae group the values showed nearly no change, which showed significant difference between both groups (p = 0.036). However, the changes of mean blood pressure and mean flow velocity did not show significant difference between both groups. Conclusion : This study demonstrated that Gastrodiae extract significantly decreased breath-holding induced CO2 reactivity. This result suggests that the clinical effect of Gastrodiae extract might be caused by increasing cerebral blood flow via dilation of cerebral resistant vessels instead of antihypertensive effect.