• Journal of Life Science
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• v.22 no.5
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• pp.569-574
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• 2012

This study was conducted to investigate the effect of exercise on oxidative stress, nerve growth, and hepatocyte growth factors in obese children. After 12 weeks of aerobic exercise training, the aforementioned parameters before and after the training were compared. As a result, the nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) were shown to be lower in the OT than in the NT before and after the training, respectively ($p$ <0.05). The NGF was shown to have increased in both groups after the training ($p$ <0.05). The hepatocyte growth factor (HGF) was shown to be higher in the OT than in the NT before the training ($p$ <0.05), with no difference found afterwards. The malondialdehyde (MDA), ox-LDL, and 8-OHdG (Oxo-2'-deoxyguanosine) were shown to be higher in the OT than in the NT ($p$ <0.05). For ox-LDL, a difference was found between before and after the training ($p$ <0.05). The results of this study showed that obesity induced oxidative stress and caused the abnormalities of nerve and HGF secretion in obese children, and that the 12 weeks of aerobic exercise increased NGF levels, thereby promoting the development of neurogenesis in children.

• Proceedings of the KSAR Conference
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• 2001.10a
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• pp.32-36
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• 2001

난소의 재형성 과정은 난소 내 여러 조절인자들에 의해 조절되는 성장 및 퇴행 과정을 반복하는 특징을 가지고 있다. 황체는 주기적 성장과 퇴행을 보이며 과립세포의 세포자멸사 (apoptosis)를 통해 황체의 퇴행이 일어나게 된다지. 이러한 세포자멸사 과정은 난소의 정상 생리에 매우 중요하다. ATP 는 자율신경으로부터 세포외 유출을 통해 분비되어 근육 수축, 신경전달체계, 외분비 및 내분비 호르몬의 분비, 면역반응, 염증, 혈소판 응집, 동통 및 심장기능의 조절 등 매우 다양한 생물학적 기능에 영향을 미친다. 이러한 작용은 세포 표변에 존재하는 purinoceptor를 통해 이루어지는 것으로 알려져 있다. ATP는 일반적으로 세포 내에서는 에너지원으로서 작용하나 세포외부에 존재하는 ATP의 경우에는 조절물질로 작용하여 어떤 세포에 있어서는 세포용해를 일으키기도 하며, 어떤 세포에서는 세포자멸사를 유발하기도 한다. 세포 내에 존재하는 ATP는 세포의 주요한 에너지원으로 사용되며 살아있는 세포에서는 세포막을 통과하지 못하는 반면 세포 외에 존재하는 ATP는 말초신경계 혹은 중추신경계에 있어서 매우 중요한 신경전달물질로 작용하고 있다. (중략)

• Polymer(Korea)
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• v.30 no.5
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• pp.445-452
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• 2006

In this study, we investigated interaction of Schwann cells (SCs) with various cell-adhesive coated polymer surface. We used cell-adhesives that like a fibronectin (FN), fibrinogen(FG), laminin(LM), vitronectin (VN), poly-D-Iysine (PDL), and poly-L-Iysine (PLL) to coat PLGA film surface and evaluated the surface property of coated or not PLGA films by measurement of water contact angle and ESCA. SCs were cultured on coated or non-coated PLGA film surface, and then examined the cell adhesion and proliferation by cell count and SEM observation. Cell count results revealed initial cell adhesion related to protein adsorption on PLGA surface. In addition, serum content in media related to cell proliferation rate. In this result, we recognized that adhesion and proliferation of SCs were affected by specific cell-adhesives. In these results, we recognized that is important to provide the suitable surface environment according to cell types and culture condition for improvement of cell adhesion and proliferation.

• Horticultural Science & Technology
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• v.31 no.3
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• pp.380-387
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• 2013

This study was performed to examine the increasing biological activities of both nerve growth factor induction and anti-aging activity of gastrodia (Gastrodia elata) with fermentation process. Antioxidant activities, taken in the fermenting, were investigated to verify utility value of gastrodia for functional food and cosmetics. Fermented gastrodia extracts showed higher antioxidant activities than dried gastrodia extracts. During the routine check of all the practical use potential as functional food, inhibition effect of angiotensin converting enzyme (ACE) and xanthine oxidase (XOase) was tested among water extracted dried gastrodia (WEDG), water extracted fermented gastrodia (WEFG), 70% ethanol extracted dried gastrodia (EEDG) and 70% ethanol extracted fermented gastrodia (EEFG). DPPH was shown as WEDG = $64.14{\pm}0.89%$, WEFG = $66.21{\pm}1.03%$, EEDG = $82.25{\pm}0.52%$, and EEFG = $82.36{\pm}2.37%$. ABTS was shown as WEDG = $54.15{\pm}1.37%$, WEFG = $60.24{\pm}2.25%$, EEDG = $59.18{\pm}1.86%$, and EEFG = $77.17{\pm}4.23%$. Therefore, ACE activity was dramatically inhibited by EERG while there was no difference of XOase inhibition between EEFG and EERG. Nerve growth factor (NGF) activity was measured and indicated about 40% increased neurite growth effect. To conclude, biologically active compounds of gastrodia were increased by fermentation process. It seems to be that ferment gastrodia enhance the use ranges from functional food to fuctional cosmetics, and to all processing industry.

• Journal of Oral Medicine and Pain
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• v.34 no.4
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• pp.387-395
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• 2009

Nerve growth factor (NGF) and sensory neuropeptides are involved in the process of nociception at peripheral nerve fibers and wide spread in central nervous system. The aims of this study were to investigate NGF and sensory neuropeptides (substance P [SP] and calcitonin gene-related peptide [CGRP]) levels in human plasma and saliva, and the associations between these sensory neuropeptides levels and chronic orofacial pain symptoms. NGF, SP, and CGRP levels in plasma and resting whole saliva samples collected from 67 orofacial pain patients (joint pain, dental or periodontal pain, mucosal pain) and 36 pain free control subjects were measured by enzyme immunoassay. The characteristic pain intensity of each subject was measured using the Graded Chronic Pain Scale and the flow rate of resting whole saliva was measured. Joint pain patients group showed significantly higher plasma NGF level compared to each of dental pain patients (p<0.01), mucosal pain patients (p<0.01), and control group (p<0.01). Plasma NGF level of dental pain patients group was significantly higher than that of control group (p<0.01). Saliva SP level of dental pain patients group (p<0.05) and saliva CGRP level of mucosal pain group (p<0.05) were significantly higher than that of control group. Plasma and saliva SP levels of joint pain patients was significantly associated with pain intensity (plasma: standardized coefficient=0.599, p<0.01, saliva: standardized coefficient=0.504, p=0.05). In dental pain patients group, plasma SP (standardized coefficient=0.559, p<0.01), saliva SP (standardized coefficient=0.520, p<0.01) and saliva CGRP (standardized coefficient=0.599, p<0.01) levels were significantly associated with age. In mucosal pain patients group, plasma SP (standardized coefficient=0.495, p<0.05), saliva SP (standardized coefficient=0.500, p<0.05), and saliva CGRP (standardized coefficient=0.717, p<0.01) levels were significantly associated with age. NGF and neuropeptides may play a role in the maintenance of various orofacial pain symptoms. The examination of those levels in plasma and saliva helps understanding the mechanism of orofacial pain, and furthermore, can be applied to the diagnosis and therapy of orofacial pain.

• Korean Journal of Biological Psychiatry
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• v.14 no.3
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• pp.161-166
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• 2007

Objectives:Recent studies have raised the possibility that nerve growth factor(NGF) is abnormally regulated in the central nervous system(CNS) of animal models with alcohol dependence. The possible alteration of NGF by prolonged alcohol intake may play an important role in alcohol-induced neurotoxicity. Carbohydrate-deficient transferrin(CDT) is regarded as a reliable biological marker of alcohol dependence. The goal of this study was to estimate the changes of %CDT and serum NGF level according to the duration of alcohol abstinence, and to identify whether %CDT level is associated with the serum NGF level in the patients with alcohol dependence. Methods:The subjects were 24 patients with alcohol dependence. We used the Axis-Shield ASA to measure the %CDT level and the enzyme-linked immunosorbent assay(ELISA) to measure the serum NGF level. %CDT and NGF levels were measured immediately after the admission and at 2 weeks after the admission. Results:Decreased %CDT were observed during the period of 2 weeks after the admission. NGF level was not significantly different after 2 weeks. The NGF levels were not correlated with %CDT. The possibility of %CDT as a predictor of alcohol-induced neurotoxicity was not confirmed. Conclusion:Serum NGF levels is not a reliable indicator of abstinence state in the patients with alcohol dependence. Further studies are needed to evaluate the relation between two indicators in regard to hematological and neurological changes in alcohol dependence.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.25 no.2
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• pp.45-57
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• 1999

Melanocytes, derived from neural crest, make melanin and protect skin from the hazardous ultraviolet light. Melanocytes with dendritic process has similar morphology with neurogenic cells and share growth factor receptors such as neurotrophin receptors. Melanogenesis can be regulated by ultraviolet light and inflammation of the skin. In addition, several factors such as hormone, cytokines, arachidonic acid can affect the proliferation and melanogenesis of melanocytes. For melanogenesis, melanocytes need expression of various genes including tyrosinase, TRP-1, TRP-2. In addition, melanin need to be transferred from melanocytes to surrounding keratinocytes. The biology of melanocytes is complex and mechanism of melanocytes proliferation and melanogenesis is still under the investigation.

• Journal of Korean Neurosurgical Society
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• v.29 no.6
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• pp.731-737
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• 2000

Objective : Growth factor receptors on the tumor cells are known to be expressed highly allowing the tumor cells to bind growth factors to stimulate cellular division. Immunotoxin therapy is one of the novel approaches to the primary malignant brain tumor, and expression of cell-surface receptor is essential for the immunotoxin to have specific anti-tumor activity. Despite promising cytotoxic activity of immunotoxin, tumor responses are not curative on clinical trials, and additional studies are needed regarding various factors influencing the efficacy of the immunotoxin. The purpose of this study is to detect the expression of various growth factor receptors on brain tumor cell lines which are going to be used in these studies. Materials and Methods : The authors detected transferrin receptor(TR), insulin-like growth factor-1 receptor(IGF-1R), and interleukin-4 receptor(IL-4R) on medulloblastoma cell line(Daoy) and glioblastoma cell lines(U373 MG and T98 G) by flow cytometric analysis. Results : TR was expressed on Daoy, U373 MG, and T98 G. IGF-1R was expressed on Daoy and U373 MG, but not on T98 G. IL-4R was expressed on all cell lines tested. Conclusion : The transferrin and interleukin-4 receptors might be good targets for immunotoxin therapy. The results should be considered in additional in vitro and in vivo studies regarding immunotoxin and in establishing the proper treatment model of the immunotoxin therapy including selection of the adequate immunotoxin.

• Journal of Life Science
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• v.26 no.5
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• pp.509-518
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• 2016

Asparagus cochinchinensis is a medical plant that has long been used to treat fever, cough, kidney disease, breast cancer, inflammatory disease and brain disease in northeast Asian countries. Although several studies have been conducted on the anti-neuroinflammatory effects of A. cochinchinensis, the correlation between these effects and nerve growth factor (NGF) has not yet been examined. In this study, we investigated the effects of an aqueous extract of A. cochinchinensis (AEAC) on the secretion and action mechanism of NGF in neuronal cells. The concentration of the NGF protein in the supernatant collected from cultured cells increased significantly in B35 cells treated with AEAC in comparison with the vehicle-treated group without any specific cytotoxicity. Furthermore, the mRNA expression of NGF showed a very similar pattern to its protein concentration. To examine the bioactivity of NGF secreted from B35 cells, undifferentiated PC12 cells were cultured in an AEAC-conditioned medium and neuritic outgrowth was observed. The dendrite length of PC12 cells in the AEAC-treated group was significantly higher than that in the vehicle-treated group. Moreover, the level of the downstream effectors p-TrkA and p-ERK of the high-affinity NGF receptor was significantly higher in the AEAC-treated group, while the expression of the downstream effectors of the low-affinity NGF receptor was significantly lower in the same group. These results suggest that AEAC may contribute to the regulation of NGF expression and secretion in neuronal cells; it is therefore an excellent candidate for further investigation as a therapeutic drug for neurodegenerative diseases.

• Journal of Life Science
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• v.20 no.6
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• pp.948-954
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• 2010

Exercise can favorably influence brain plasticity by facilitating neurogeneration, neuroadaptivity, and neuroprotection. Aerobic exercise has been reported to change brain nerve growth factors (growth hormone, insulin like factor-1, estrogen and serotonin). The purpose of this study was to demonstrate the effects of aerobic exercise for 12 weeks on brain nerve growth factors in girls. Fourteen female participants in elementary school grades 1 through 3 were randomly allocated to the exercise group (EG, n=6) and control group (CG, n=8). The EG participated in 60 minutes of modified ballet exercise as aerobic training three days a week for 12 weeks. Based on comparison between groups by two-way ANOVA with repeated measures, aerobic exercise program participants experienced decreased weight (p<0.01), BMI (p<0.01), fat mass (p<0.001), fat percent (p<0.001) and increased LBM (lean body mass) percent (p<0.001). In addition, we detected that aerobic exercise decreased the level of serotonin (p<0.05) and increased the level of GH (p<0.05) and IGF-1 (p<0.05). These findings suggest that aerobic exercise programs can be an efficient intervention to change body composition, alleviate central fatigue, improve brain function, and induce brain cell proliferation in girls.