• Journal of Chest Surgery
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• v.31 no.2
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• pp.95-101
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• 1998

Ischemic preconditioning is known to have protective effect on myocardial function at prolonged ischemic insult but the mechanism of the effect is not clearly known. The effect of the preconditioning on the global ischemia using cardioplegic solution is not well known. To evaluate the effect of global myocardial preconditioning on the functional recovery after cardioplegic arrest and two hours of hypothermic storage, we used the isolated rat heart and two hours cardioplegic arrest time at $0^{\circ}C$. In the experimental group(n=10), after baseline functional data was obtained, ischemic preconditioning was induced with 1 min of global normothermic ischemia for three times before the arrest period. In the control group(n=10), hearts underwent no ischemic precondi- tioning. After 2 hrs of cardioplegic arrest and storage in the $0^{\circ}C$ cardioplegic solution reperfusion was done and hemodynamic data were collected at post-reperfusion 20 min. Heart with ischemic preconditioning showed improved functional recovery at post reperfusion 20 min in peak developed pressure and dP/dT. In percent change of the peak pressure, preconditioning group showed 93.20$\pm$15.7% recovery rate compared to baseline data, and control group showed 67.3$\pm$15.6% recovery rate. In percent change of the dP/dT, control group showed 54.7$\pm$18.2% recovery rate and preconditioning group showed 78.1$\pm$15.1% recovery rate. Percent changes in heart rate and coronary flow showed no significant difference between two groups and there was no significant differences in amount of cardioplegic delivery between groups. Our data suggest ischemic preconditioning may have protective effect on recovery state after cardioplegic arrest and 2 hr ischemic storage of isolated rat heart and its mechanism is not related to the amount of the cardioplegic delivery amount.

• Clinics in Shoulder and Elbow
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• v.15 no.2
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• pp.73-78
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• 2012

Purpose: Understanding exactly detailed anatomy and morphology of scapula is very important for further surgical procedures. This study was intended to provide accurate anatomic and morphologic information of scapula by exactly measuring scapular thickness using computed tomography and reconstructing its geometric model. Materials and Methods: Eight average lengths and two angles of 102 scapular structures obtained from 51 cadavers were generally measured by computed tomography. Also, to measure the scapular thickness, sagittal planes of each scapula were divided almost equally and the thicknesses of each sagittal plane was measured by computed tomography. After measuring every thickness, average results were calculated and the gender difference was compared by Student t-test. Results: Average results of the thickness of glenoid fossa, lateral border, medial border, and the middle 1/3 portion of the scapular body were 22.4 mm, 13.83 mm, 4.44 mm and 2.06 mm, respectively. Also, male scapulars were found to be significantly thicker than female. Based on these measured thicknesses, we reconstructed the 3-dimensional geometric model of scapula. Conclusion: From these results, glenoid fossa and lateral border were the thickest part of scapula, while the middle 1/3 portion of the scapular was the thinnest.

• Korean Journal of Food Science and Technology
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• v.38 no.5
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• pp.679-683
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• 2006

The effects of dried and fermented guava (Psidium guajava L.) leaf extracts on blood glucose levels were investigated in low-dose streptozotocin(STZ)-induced diabetic mice. Fermented guava leaf extract (500 mg/kg/day) significantly decreased the fasting blood glucose levels after 2-4 weeks of treatment and improved the impaired glucose tolerance in STZ-induced diabetic mice. On the other hand, dried guava leaf extract lowered the blood glucose levels and improved glucose tolerance two weeks after treatment, but exacerbated STZ-induced high blood glucose levels three and four weeks after treatment. Histological and immunohistochemical observation showed that fermented guava leaf extract treatment improved STZ-induced pancreatic beta-cell damage, but dried guava leaf extract did not affect the damage to the beta-cells. These results suggest that fermented guava (Psidium guajava L.) leaf extracts improve the hyperglycemia by protecting the pancreatic beta-cells hom damage in STZ-induced diabetic mice.

• Journal of agriculture & life science
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• v.50 no.3
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• pp.129-139
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• 2016

Curcumin plays a protective role in brain injury through its anti-oxidant and anti-inflammatory activities. Moreover, peroxiredoxin-5 exerts a protective effect against oxidative stress. The aim of this study was to investigate whether curcumin modulated the peroxiredoxin-5 expression in focal cerebral ischemic animal model. Middle cerebral artery occlusion(MCAO) was performed to induce cerebral ischemic injury in rats. Adult male rats were injected intraperitoneally with vehicle or curcumin(50mg/kg B.W.) 1 h after MCAO and cerebral cortex tissues were collected 24 h after MCAO. Photographs of hematoxylin and eosin staining showed that MCAO induced necrotic changes with scalloped shrunken form and apoptotic changes with nuclear chromatin condensations. However, curcumin treatment attenuated MCAO-induced histopathological changes. Moreover, this study clearly showed that peroxiredoxin-5 expression was decreased in MCAO operated animal with vehicle using a proteomics approach. However, this decrease in peroxiredoxin-5 expression was attenuated by curcumin treatment. Reverse-transcription PCR and Western blot analyses confirmed that curcumin treatment alleviated the MCAO injury-induced decrease in peroxiredoxin-5 expression(p<0.05). These results demonstrated that curcumin regulates peroxiredoxin-5 expression in MCAO animal model. In conclusion, our findings suggest that curcumin exerts a neuroprotective effect in cerebral ischemia by attenuating the MCAO-induced decrease in peroxiredoxin-5 expression.

• Journal of Physiology & Pathology in Korean Medicine
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• v.34 no.1
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• pp.14-23
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• 2020

This study was conducted to evaluate the efficacy of Cheongawongagam on osteoporosis rat. A total of 35 rats were divided into seven groups; Normal control(SD-Nr), experimental control group(OVX-CTL), positive control group(OVX-17β-E2) and herb extracts group[Eucommia ulmoides(OVX-EU-E), Juglandis semen(OVX-JR-SE), Acanthopanax senticosus(OVX-AS-E) extract and Cheongawongagam extracts(OVX-JAEG-E)]. All control group, and herb extracts group were ovariectomized. After the 3 weeks recovery period, herb extract group were orally administered 200 mg / kg of the EU-E, JR-SE, AS-E and JAEG-E for 12 weeks. In the OVX-CTL, 17β-estradiol(E2) was administered subcutaneously on the back of the rats at a dose of 0.03 ug/sc. Their body weight, serum total cholesterol, triglyceride, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), Leukotriene B4 (LTB4), calcium (Ca), estradiol, osteocalcin, and deoxypyridinoline (DPD) concentration were measured. Also, we investigated mRNA expression of inflammatory cytokine, MMP-2, MMP-9, and bone tissue. As a result, total cholesterol was significantly decreased in the OVX-AS-E and OVX-JAEG-E. ALP was significantly increased and osteocalcin, DPD was significantly decreased in OVX-JAEG-E. The expression of inflammatory mediators (TNF-α, IL-1β, LTB4, COX-2, NOS-2), inflammatory cytokines IL-1β and MMP-9 mRNA were significantly decreased in OVX-JAEG-E. Histologic examination of the femur showed that bone mineral density, and bone mass were increased and bone marrow were decreased in the OVX-JAEG-E group. The above experiment shows that cheongawongagam extract were effective in the prevention and treatment of osteoporosis.

• Korean Journal of Acupuncture
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• v.25 no.1
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• pp.155-164
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• 2008

목 적 : 본 연구의 목적은 양릉천 침 처치 시 C57BL/6 생쥐의 중뇌 흑질에 위치한 도파민성 신경세포 사멸 억제 효과를 조직화학 염색법을 이용하여 Tyrosine hydroxylase(TH)와 laminin의 발현으로 관찰하고자 한다. 실험방법 : 실험에 이용한 동물은 C57BL/6 생쥐로, 매일 25mg/kg의 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)를 5일간 주사하였고, 매일 MPTP 주사한 뒤 2시간 후에 양릉천에 침치료를 시행하였으며 MPTP 주사를 종료한 뒤 침치료는 7일동안 계속 시행하였다. 마지막 MPTP 주사 7일 후에 동물을 희생하여 뇌를 적출하고 고정하였다. 침효과를 확인하기 위해 Thyrosine hydroxylase(TH), laminin의 발현 변화 정도를 조직염색화학법으로 이용하여 확인하였다. 각 그룹간의 유의성 검증은 one-way ANOVA를 이용하였다. 결 과 : 도파민성 신경세포 선택적인 신경독소인 MPTP에 대한 양릉천 침처치에 의한 신경보호 효과를 도파민신경세포의 표지자인 TH 발현을 면역화학조직염색법으로 관찰하였다. 대조군에 비해 MPTP 처치 군의 신경세포 사멸이 유의적으로 감소하였고(P <0.05), MPTP + 침처치 군에서 증가되는 양상을 확인하였다 (P <0.05). 또한 도파민성 신경세포내에 존재하는 laminin의 발현정도 역시 대조군보다 MPTP 처치 군에서 유의적으로 감소하였고, MPTP + 침처치 군에서 증가되는 양상을 확인하였다 (P <0.05). 결 론 : MPTP에 의한 도파민성 신경세포 손상에 대한 양릉천 침처치의 신경보호 효과는 세포외 기질중의 하나인 laminin의 발현 정도를 조절하여 비롯되는 것으로 사료된다.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.5
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• pp.1226-1232
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• 2006

This study was carried out to investigate the effects of Cervi Pontotrichum cornu and Carthami semen on the serum osteocalcin level, bone mineral density, bone trabecular area and cortical thickness index in ovariectomized rats. Femal Sprague-Dawley rats were divided into 5 groups. Non-ovariectomized groups were divided into commertial diet fed(normal group) and calcium free basal diet fed(sham operation group). Ovariectomized groups were divided into 3groups, calcium free basal diet fed group(control group or ovariectomized group), 10% Cervi Pontotrichum cornu supplemented diet fed group and 10% Carthami semen supplemented diet fed group. After 4 weeks diet fed, serum osteocalcin level, bone mineral density, bone trabecular areas and cortical thickness index were analyzed. The bone mineral density and bone trabeculae area were significantly increased by Cervi Pontotrichum cornu and Carthami semen supplemented diet fed groups. The osteocalcin level was significantly decreased by Cervi Pontotrichum cornu and Carthami semen supplemented diet fed groups. The trabecular area(%) in epiphysis of tibia was significantly increased by Cervi Pontotrichum cornu and Carthami semen supplemented diet fed groups. The cortical thickness index in distal diaphysis of tibia was significantly increased by Cervi Pontotrichum cornu and Carthami semen supplemented diet fed groups. the alkaline phosphatase level was significantly decreased by Cervi Pontotrichum cornu and Carthami semen supplemented diet fed groups. These results suggest that Cervi Pontotrichum cornu and Carthami semen might have inhibitory effects on osteoporosis by increasing bone mineral density and accerelating bone formation in ovariectomized rats.

• The Journal of Korean Obstetrics and Gynecology
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• v.25 no.4
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• pp.12-26
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• 2012

Objectives: The purpose of this study is to examine the effects of Sagunjatang-Gami(SGJT) on uterine and ovarian function in the ovariectomized rat postmenopause model. Methods: SGJT was administered in ovariectomized Wister albino female rats for three month. After that, uterine weight, uterine index, serum estradiol-$17{\beta}$ levels and phosphorylation of ERK or AKT, and histological analysis of uterus were measured to assess the impact on uterine and ovarian function in ovariectomized rats. In addition, phosphorylation of $ER{\alpha}$, ERK, AKT by SGJT in MDA-MB-231 cells were measured. To identify safety of SGJT, the cell cytoxicity in MDA-MB-231 cells and serum GOT, GPT levels were measured in ovariectomized rats. Results: The results were as follows. 1. SGJT decreased the viability of MDA-MB-231 cells in a dose-dependent manner. 2. The level of serum GOT, GPT in SGJT-treated group showed significant decrease in comparison with control group. 3. Phosphorylation of $ER{\alpha}$, ERK, AKT by SGJT in MDA-MB-231 cells were increased. 4. Uterus index in SGJT-treated group showed significant increase in comparison with control group. The level of serum estradiol-$17{\beta}$ in SGJT-treated group showed significant increase in comparison with control group. Phosphorylation of ERK or AKT by SGJT in the uterus of ovariectomized rats was increased significantly. 5. Uterus index and the level of serum estradiol-$17{\beta}$ in SGJT-treated group increased at higher rates in comparison with estrogen-treated group. Conclusions: Taken together, we suggest that SGJT has been shown to be effective in preventing postmenopausal uterine and ovarian degeneration and curing postmenopausal low estrogen related symptoms.

• Journal of Physiology & Pathology in Korean Medicine
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• v.37 no.2
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• pp.30-35
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• 2023

Bisphosphonates, estrogen, and calcium supplements are commonly used medications for postmenopausal osteoporosis, but they are associated with various side effects such as vaginal bleeding, deep vein thromembolism, and breast cancer. In this study, we aimed to investigate the potential of a compound isolated from the roots of Oryza sativa L. to improve osteoporosis using an ovariectomized mouse model. We isolated and identified oryzativol A, a lignan compound, through chemical analysis of an ethanol extract using a bioassay-guided fractionation protocol. We also examined the metabolism, clearance, and CYP enzyme activity of oryzativol A, and found that it showed plasma stability of over 80% at all analysis times, and indicating a low likelihood of inactivation or excretion by the CYP3A4 enzyme. Our results showed that the high-dose group of oryzativol A exhibited a significant increase in bone mineral density compared to the control group. Although the ALP concentration did not differ significantly compared to the control group, it showed a tendency to increase in the high-dose group of oryzativol A. Furthermore, the abnormal ratio of serum Ca/P, caused by osteoporosis, was improved to a level closer to that of the normal group as the dosage of oryzativol A increased. Taken together, these findings suggest that oryzativol A is stable in vivo and has potential as a therapeutic agent for osteoporosis, particularly when administered in high doses.

• The Journal of Korean Obstetrics and Gynecology
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• v.36 no.4
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• pp.1-20
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• 2023

Objectives: The object of this study was to observe the complex anti-climacterium potentials of Yuklinzu aqueous extracts (YLZ), using bilateral ovariectomy (OVX) female ddY mice similar to women postmenopausal symptoms, as including cardiovascular diseases, obesity, hyperlipidemia, osteoporosis and hepatic steatosis. Methods: In order to evaluate anti-climacterium effects of YLZ, six groups of mice were used; sham control, OVX control, 17β-estradiol, YLZ 500, 250 and 125 mg/kg treated groups. Since 28 days after bilateral OVX surgery, YLZ were administered orally for 84 days, once a day. And then we evaluated anti-climacterium effects divided into five categories; estrogenic effects, anti-obesity, hypolipidemic effects, hepatoprotective effects and anti-osteoporotic effects. The results of YLZ were compared with 17β-estradiol 0.03 ㎍/head/day subcutaneous treated OVX mice. Results: As a result of OVX, obvious changes related to the estrogen-deficient menopausal symptoms - obesity, hyperlipidemia, hepatic steatosis and osteoporosis were displayed in mice. However, these menopausal symptoms induced by OVX were significantly inhibited by 84 days of consecutive treatment of 17β-estradiol, YLZ 500, 250 and 125 mg/kg, respectively. Especially, YLZ showed obvious dose-dependent inhibitory activities on the OVX-induced climacterium changes in mice, and YLZ 500 mg/kg showed comparable inhibitory effects against menopausal symptoms in comparison with those of 17β-estradiol 0.03 ㎍/head/day subcutaneous treatment. Conclusions: The results suggest that oral administration of YLZ 500, 250 and 125 mg/kg has obvious dose-dependent favorable anti-climacterium effects in OVX mice. Especially, YLZ 500 mg/kg showed comparable inhibitory effects against menopausal symptoms in comparison with those of 17β-estradiol 0.03 ㎍/head/day subcutaneous treatment.