• Environmental Analysis Health and Toxicology
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• 제13권3_4호
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• pp.143-149
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• 1998

To elucidate the preventive effect of Danchisoyosan (DS) on stress, we investigated the physiological change of rats which were applied immobilization stress. For immobilization stress, rats were placed in restrainer for 12 hours a day for 3 days. During application of stress, body weight of rats was measured. After sacrifice, 8 organs were taken for measurement of organ weight. Brain was sectioned into 4 parts that are Frontal Cortex, Corpus Striatum, Hypothalamus and Hippocampus. Each part was homogenated and its catecholamine and serotonin contents were measured with HPLC. In our study, stress mainly induced increase of concentration of neurotransmitters in brain without other significant physical change of rats. DS inhibited stress induced changes of neurotransmitter content in brain.

• 동의신경정신과학회지
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• 제9권2호
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• pp.1-18
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• 1998

This study aimed to evaluate the anti-stress effects of soyosan and chyengansoyosan on the contents cold swimming stress.The experimental animals were forced cold swimming stress for 3 minutes, and administered 4㎎/10g of soyosan and chyengansoyosan extract for 7 days before stress. The monoamines contents were measured by HPLC method in various part of mouse brain. The following results were obtained :1. In frontal cortex, the contenrs of norepinephrine ans dopamine increased significantly in the group administered chyrngansoyosan compared with in the group administered non chyengansoyosan and soyosan(control group) of mice stressed by cold swiming.2. In hypothalamus, the content of norepinephrine increased with statistical significance in the group administered soyosan compared with control group of mice stressed by cold swimming. 3. The content of dopamine increased with statistical significance on the group administered chyenfansoyosan and compared with control group of mice stressed by cold swimming in hypothlaamus and hippocampus.4. The content of serotonin increased with statistical significance in the group administered soyosan and compared with control group of mice stressed by cold swimming in hippocampus and corpus striatum.5. In corpus striatum and hippocampus, the content of norepineohrine decreased with statistical significance in the group administered soyosan and chyengandoyosan compared with control group of mice stressed by cold swimming.Judgding from the above results, this sthdy reaches a conclusion that soyosan or chyengansoyosas has significant effects in reducing stress.

• Asian-Australasian Journal of Animal Sciences
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• 제30권12호
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• pp.1784-1795
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• 2017

Objective: The study examined the effect of intravenous administration of bacterial endotoxin-lipopolysaccharide (LPS) -on the nocturnal secretion of melatonin and on the expression of enzymes of the melatonin biosynthetic pathway in the pineal gland of ewes, taking into account two different photoperiodic conditions: short-night (SN; n = 12) and long-night (LN; n = 12). Methods: In both experiments, animals (n = 12) were randomly divided into two groups: control (n = 6) and LPS-treated (n = 6) one. Two hours after sunset, animals received an injection of LPS or saline. Blood samples were collected starting one hour after sunset and continuing for 3 hours after the treatment. The ewes were euthanized 3 hours after LPS/saline treatment. The concentration of hormones in plasma was assayed by radioimmunoassay. In the pineal gland, the content of serotonin and its metabolite was determined by HPLC; whereas the expression of examined genes and protein was assayed using real-time polymerase chain reaction and Western Blot, respectively. Results: Endotoxin administration lowered (p<0.05) levels of circulating melatonin in animals from LN photoperiod only during the first hour after treatment, while in ewes from SN photoperiod only in the third hour after the injection. Inflammation more substantially suppressed biosynthesis of melatonin in ewes from SN photoperiod, which were also characterised by lower (p<0.05) cortisol concentrations after LPS treatment compared with animals from LN photoperiod. In the pineal gland of ewes subjected to SN photoperiod, LPS reduced (p<0.05) serotonin content and the expression of melatonin biosynthetic pathway enzymes, such as tryptophan hydroxylase and arylalkylamine-N-acetyltransferase. Pineal activity may be disturbed by circulating LPS and proinflammatory cytokines because the expression of mRNAs encoding their corresponding receptors was determined in this gland. Conclusion: The present study showed that peripheral inflammation reduces the secretion of melatonin, but this effect may be influenced by the photoperiod.

• The Korean Journal of Physiology and Pharmacology
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• 제25권3호
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• pp.189-195
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• 2021

Fluoxetine (FLX), a selective serotonin reuptake inhibitor antidepressant, exhibits various other mechanisms of action in numerous cell types and has been shown to induce cell death in cancer cells, paving the way for its potential use in cancer therapy. The aim of this study was to determine the off-target effects of the anti-depressant drug FLX, on the human ovarian granulosa tumor COV434 cells stimulated by forskolin (FSK), by measuring the real-time kinetics of intracellular cyclic AMP (cAMP), ATP level, cytoplasmic calcium ([Ca2+]cyt) and survival of COV434 cells. We show that incubating COV434 cells with FLX (between 0.6 and 10 μM) induces a decrease in intracellular cAMP response to FSK, a drop in ATP content and stimulates cytoplasmic Ca2+ accumulation in COV434 cells. Only the highest concentrations of FLX (5-10 μM) diminished cell viability. The present report is the first to identify an action mechanism of FLX in human tumor ovarian cells COV434 cells and thus opening the way to potential use of fluoxetine as a complementary tool, in granulosa tumor treatments.

• 동의신경정신과학회지
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• 제15권1호
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• pp.101-119
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• 2004

Ginseng Radix Alba and Cyperi Rhizoma were investigated for their anti-depressant effects. For this purpose, forced-swimming test, tail suspension test, hot plate test, reserpine-induced hypothermia, aggressive behavior test were performed. In addition, the brain content of 5-hydroxyindoleacetic acid(a metabolite of serotonin), the monoamine oxidase activity, anticonvulsant effect, sleep enhancement effect were determined. The results are as follows: In the forced swimming test, Ginseng Radix diminished the duration of immobility by 45.5% compared to the control group, while Cyperi Rhizoma showed weaker effect (12.4% reduction) at 2g/kg. In the tail suspension test, the effect of Ginseng Radix(43.7% reduction) are also better than that of Cyperi Rhizoma(15.6% reduction) at 2g/kg. In the hot plate test, Ginseng Radix showed no difference as compared to control, while Cyperi Rhizoma increased the jump latency time by about 25% after administration for 10 days. In the reserpine-induced hypothermia test, both drugs slowly dropped the body temperature compared to the control group, especially the rate of hypothermia of Ginseng Radix was 24.0% at 1g/kg. In the aggressive behavior test, both drugs delayed the onset time, decreased the duration and frequency, of which effects were better in Cyperi Rhizoma. The content of 5-hydroxyindoleacetic acid in mice brain was slightly increased in Ginseng Radix, while Cyperi Rhizoma increased its level almost to the control group. Both drugs inhibited the monoamine oxidase activity in a dose-dependent manner, but the effect(51.2%) of Cyperi Rhizoma was more potent than the effect(11.8%) of Ginseng Radix. In the pentobarbital-induced sleep test, Cyperi Rhizoma exhibited no significant difference against the control group, while Ginseng Radix showed about two-fold enhancement at 2g/kg. The anticonvulsant effect of both drugs delayed the onset time, shortened the duration of convulsion and diminished the lethality, but Ginseng Radix were better than Cyperi Rhizoma.

• Journal of Animal Science and Technology
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• 제63권5호
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• pp.1169-1181
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• 2021

We investigated the comparative physicochemical attributes, oxidative stability, and microbial characteristics of 28 days dry-aged meat in between boneless sirloin (gluteus medius) and bone-in T-bone steaks (infraspinatus) muscles from Korean Native Hanwoo Steer (KNHS). Results reveal that regardless of the muscles, dry-aging increased protein content and water-holding capacity (WHC) (p < 0.05). Meat from infraspinatus-aged muscle led to darker meat with higher pH values than un-aged meat (p < 0.05). However, fat content, CIE a^*, and CIE b^* remained unchanged in both muscles at aging. At aged meat, thiobarbituric acid reactive substances (TBARS) values from bone-in infraspinatus muscle was 2.5-fold higher than boneless gluteus medius muscle (p < 0.05). Dry-aging led to an increase in the contents of total unsaturated fatty acids (UFAs), monounsaturated fatty acids (MUFAs), and UFA/saturated fatty acids (SFA) in both muscles (p < 0.05). Furthermore, gluteus medius aged muscle concentrated with olic acid (C18:1) compared to infraspinatus aged muscle. Irrespective of the muscles, dry-aging enhanced the total free amino acids (FAAs) as well as tasty, and bitter amino acid contents whereas decreased the tasty/bitter amino acids (p < 0.05). Aromatic amino acid, tryptophan that converted to serotonin was 2-fold higher in boneless gluteus medius muscle than bone-in infraspinatus muscle at pre and post aging processes (p < 0.05). Aged Infraspinatus muscle increased total bacteria (p < 0.05) while no salmonella spp. was detected in both muscles. Taken together, our study confirms that 28 days dry-aging profiling the quality characteristics of boneless sirloin (gluteus medius) and bone-in T-bone steaks (infraspinatus) distinctly while gluteus medius aged steak performs better owing to oxidative stability and functional compounds than infraspinatus aged steak.

• The Korean Journal of Pain
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• 제37권3호
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• pp.218-232
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• 2024

Background: Cynara scolymus has bioactive constituents and has been used for therapeutic actions. The present study was undertaken to investigate the mechanisms underlying pain-relieving effects of the hydroethanolic extract of C. scolymus (HECS). Methods: The antinociceptive activity of HECS was assessed through formalin and acetic acid-induced writhing tests at doses of 50, 100 and 200 mg/kg intraperitoneally. Additionally, naloxone (non-selective opioid receptors antagonist, 2 mg/kg), atropine (non-selective muscarinic receptors antagonist, 1 mg/kg), chlorpheniramine (histamine H₁-receptor antagonist, 20 mg/kg), cimetidine (histamine H₂-receptor antagonist, 12.5 mg/kg), flumazenil (GABA_A/BDZ receptor antagonist, 5 mg/kg) and cyproheptadine (serotonin receptor antagonist, 4 mg/kg) were used to determine the systems implicated in HECS-induced analgesia. Impact of HECS on locomotor activity was executed by open-field test. Determination of total phenolic content (TPC) and total flavonoid content (TFC) was done. Evaluation of antioxidant activity was conducted employing 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. Results: HECS (50, 100 and 200 mg/kg) significantly indicated dose dependent antinociceptive activity against pain-related behavior induced by formalin and acetic acid (P < 0.001). Pretreatment with naloxone, atropine and flumazenil significantly reversed HECS-induced analgesia. Antinociceptive effect of HECS remained unaffected by chlorpheniramine, cimetidine and cyproheptadine. Locomotor activity was not affected by HECS. TPC and TFC of HECS were 59.49 ± 5.57 mgGAE/g dry extract and 93.39 ± 17.16 mgRE/g dry extract, respectively. DPPH free radical scavenging activity (IC₅₀) of HECS was 161.32 ± 0.03 ㎍/mL. Conclusions: HECS possesses antinociceptive activity which is mediated via opioidergic, cholinergic and GABAergic pathways.

• 대한약리학회지
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• 제31권1호
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• pp.11-15
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• 1995

연수의 세로토닌 신경계는 내재성 하행성 동통 억제계 (endogenous descending pain inhibitory system) 에 있어서 중추적인 역할을 하고 있다. 연수의 세로토닌 신경세포에 대한 cholecystokinin (CCK) 및 second messenger systems에 작용하는 약물들의 작용을 알아보기 위하여, 쥐의 태자 (태생 14일) 로부터 연수를 분리하여 10동안 배양한 후 5-hydroxytryptamine (5-HT)의 분비에 대한 cholecystokinin (CCK) 및 second messenger systems에 작용하는 약물의 영향을 연구하였다. 배양 10일된 세포에 여러 neuropeptide들을 $10{\mu}M$ 농도로 48 시간동안 자극한 결과, CCK 와 substance P에 의하여 5-HT의 분비가 증가됨을 관찰하였다. Somatostatin, proctolin, thyrotropin releasing hormone, 및 interleukin-6 은 5-HT의 분비에 있어서 아무런 영향이 없었다. 어떠한 second messenger가 CCK에 의한 5-HT 분비에 연관되어 있나를 알아보기 위하여 calcium channel 봉쇄제인 nimodipine, 그리고 calmodulin 길항제인 calmidazolium의 영향을 살펴본 결과 nimodipine ($1{\mu}M$)은 거의 완전하게, 그리고 calmidazolium ($1{\mu}M$)은 부분적으로 유의하게 CCK에 의한 5-HT의 분비를 억제하였다. 또한 adenyl cyclase의 활성도를 높이는 forskolin ($5{\mu}M$)은 5-HT의 분비를 증가시켰지만 protein kinase C(PKC)를 활성화시키는 phorbol myristate acetate (PMA)는 $2{\mu}M$ 농도에서 5-HT의 분비에 아무런 영향을 미치지 아니하였다. 이상의 연구결과, calcium channel을 통한 calcium influx와 세포내 calmodulin이 CCK에 의한 5-HT분비 증가에 있어서 중요한 역할을 함을 제시한다. 또한, 5-HT의 분비에 있어서 cyclic AMP system이 중요한 역할을 하나, PKC system은 5-HT의 분비에 연관이 없음을 제시하고 있다.

• 동의신경정신과학회지
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• 제8권1호
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• pp.49-68
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• 1997

This study aimed to evaluate the anti-stress effect of Yangsimtang and Yangsimtang+Siyup on the rats in immobilization stress.The experimental animals were immobilized in the stress box(5${\times}$5${\times}$20cm) for 12 hours in a day suring 3 days, and administered 1ｇ/100ｇ of Yangsimtang and Yangsimtang+Siyup and Siyup extract for 12 days before stress. The norepinephrine, epinephrine, dopamine and serotonin contents were measured by HPLC method in various part of rat brain.The following results were observed.1. In frontal cortex the norepinephrine content of control group was 561.${\pm}$24.46 ng/g brain tissue, that of saple 1 group was 430.8$\pm$41.2 ng/g brain tissue, and that of sample 2 group was 417.2$\pm$38.5 ng/g brain tissue. The differences was statistically significant.2. In corpus striatum, the norepinephrine content of control group was 561.3$\pm$27.3 ng/g brain tissue, and that of sample 1 group was 422.1$\pm$21.2 ng/g brain tissue, the dopamine content of control group was 1205.1$\pm$75.9 ng/g brain tissue, that of sample 2 group was 685.6$\pm$41.5 ng/g brain tissue. The differences was statistically significant.3. In hypothalamus, the norepinephrine content of control group was 1165.1$\pm$162.6 ng/g brain tissue, that of sample 2 group was 947.2$\pm$35.7 ng/g brain tissue. The differences was statistically significant.4. In hippocampus, the norepinephrine content of control group was 931.6$\pm$82.2 ng/g brain tissue, that of sample 1 group was 652.1$\pm$47.5 ng/g brain tissue, and that of sample 2 group was 627.4$\pm$31.2 ng/g brain tissue, the dopamine contrnt of control group was 315.4$\pm$28.4 ng/g brain tissue, that of sample 2 group was 208.5$\pm$23.7 ng/g brain tissue. The differences were statistically significant.Base on the above results, it may be concluded that Yangsimtang and Yangsimtang+Siyup are effective to reduce stress.

• The Korean Journal of Physiology and Pharmacology
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• 제4권2호
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• pp.129-135
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• 2000

Previously, we have reported that ${\rho}-chlorophenylalanine$ (PCPA), a serotonin depletor, profoundly increased pancreatic fluid and bicarbonate secretion but remarkably inhibited pancreatic amylase secretion in anesthetized rats. The present study was performed to verify the detailed effects of PCPA on pancreatic amylase synthesis that is directly related to amylase exocrine secretion. PCPA significantly decreased pancreatic RNA and protein contents as well as the amylase activity. However, pancreatic DNA content, trypsin and chymotrypsin activities were not influenced by the treatment of PCPA. The rate of pancreatic amylase synthesis, which was assessed by the amount of incorporated $[^{35}S]-methionine$ into amylase for 1 h, was also significantly decreased by 44% in PCPA-treated rats. In order to determine whether the PCPA-induced decrease of amylase synthesis resulted from change in the level of amylase mRNA, Northern blot analysis was performed. The mRNA expression level of amylase was also decreased by 48% in the PCPA-treated rats, indicating that the inhibitory effect of PCPA on the synthesis of pancreatic amylase was mainly regulated at a step prior to translation. It was also revealed in SDS-polyacrylamide gel electrophoresis that the qualitative change of amylase was induced by PCPA. The 54 KDa amylase band seems to be degraded into small molecular weight protein bands in PCPA-treated rats, suggesting that the PCPA- induced decrease of amylase may be partly attributed to the degradation of synthesized amylase.