Biodegradable microneedle acupuncture has equivalent efficacy to traditional intradermal acupuncture for dry eye disease: A pilot single-blinded, randomized controlled trial.

BACKGROUND: Dry eye disease (DED) is a common ocular disorder in which the tear film cannot maintain homeostasis. Acupuncture has been used to treat DED in Korean medicine. Particularly, intradermal acupuncture (IDA) is less painful and enables free movement after treatment. However, it can also provoke allergic reactions to metal. To overcome this, biodegradable microneedle acupuncture (BMA) has been developed. This study compared BMA with traditional IDA in terms of efficacy and safety in patients with DED. METHODS: This study was designed as an investigator-initiated, assessor-blinded, single-center, parallel randomized controlled trial. Thirty patients with DED were enrolled and randomized to one of the treatments. One group was treated with BMA on the acupoints, including bilateral BL2, GB14, TE23, EX-HN5, and ST1. The other group was treated with traditional IDA at the same acupoints. Treatments were conducted 3 times a week for 4 weeks. The major endpoint was ocular surface disease index (OSDI). The minor endpoints were subjective symptoms visual analog scale (VAS), quality of life (QoL), and tear production measured by the Schirmer I test. RESULTS: All enrolled participants successfully completed the trial, and all of their data was analyzed. Both treatments remarkably improved the OSDI score, VAS score, QoL score, and tear secretion after 4 weeks (P < .05). Except for tear production in the left eye (P < .05), there were no statistical differences between the 2 treatments on the final visit (P > .05). No adverse events were observed. CONCLUSION: BMA and IDA had the same therapeutic effect for improving DED and both were safe. BMA can be used in patients with DED as an alternative to traditional IDA.

Safety and efficacy of combined acupuncture (body and intradermal acupuncture) for dry eye disease: study protocol for a pilot, single-centre, assessor-blinded, randomised, artificial tear drop-controlled trial at Naju Dongshin University Korean Medicine Hospital.

INTRODUCTION: The prevalence of dry eye disease (DED) has been consistently increasing yearly. However, the radical therapy has not yet been established. This study is to confirm the superiority of acupuncture over artificial tear drops (ATDs) in patients with DED. METHODS AND ANALYSIS: This study is a single-centre, investigator-initiated, assessor-blinded, parallel randomised controlled trial. 30 participants will be enrolled. Over a period of 4 weeks, the experimental group would receive two kinds of acupuncture three times a week. First, body acupuncture would be performed on bilateral BL2, GB14, TE23, EX-HN5 and ST1 for 15 min. Thereafter, intradermal acupuncture would be performed on the same acupoints for 4 hours. On the other hand, the control group would apply the provided ATD at least four times a day. As a rescue medication for severe DED symptoms, both groups can additionally apply ATD. The frequency of ATD use would be recorded during the trial. The primary outcomes are the Ocular Surface Disease Index and tear film break-up time. The secondary outcomes are subjective symptom Visual Analogue Scale, quality of life, Schirmer I test, tear lactoferrin level, treatment satisfaction and safety. The outcomes would be mostly assessed at visits 1, 13 and 14. ETHICS AND DISSEMINATION: This study was approved by the institutional review board of Naju Dongshin University Korean Medicine Hospital (Approval No. NJ-IRB-23-5). The obtained results will be disseminated through publication in a peer-reviewed journal. TRIAL REGISTRATION NUMBER: KCT0008563.

Exploring the Effect of Deep-Sea Water on the Therapeutic Potential of the Anti-Inflammatory Response in an Indomethacin-Induced Gastric Ulcer Rat Model.

Gastric ulcers are often exacerbated by factors such as nonsteroidal anti-inflammatory drugs (NSAIDs) and inflammation, and they have a substantial impact on a significant portion of the population. Notably, indomethacin is recognized as a prominent contributor to ulcers. This study investigated this potential method, with normalization to the anti-inflammatory and antiulcer properties of deep-sea water (DSW)-derived mineral water, using an indomethacin-induced gastric ulcer model in rats. The study involved four groups (n = 6 rats/group): normal control group (CON), indomethacin-only group (IND), indomethacin with trace mineral water group (TM), and indomethacin with high magnesium low sodium water group (HMLS). For three weeks, the CON and IND groups consumed tap water, while the TM and HMLS groups had access to mineral water. Gastric ulcers were induced on the final day using indomethacin, for all groups except the CON group. The results demonstrated that HMLS intake significantly improved gastric mucosal damage, preserved mucin stability, and increased gastric thickness, indicating its potential to prevent and alleviate indomethacin-induced gastric ulcers. Furthermore, HMLS consumption led to the upregulation of key genes associated with inflammation and a reduction in inflammatory cytokines. These findings suggest that DSW-derived mineral water, and particularly its high Mg2+ content, may offer promising health benefits including anti-inflammatory and anti-ulcer properties.

Euglena gracilis (Euglena) powder supplementation enhanced immune function through natural killer cell activity in apparently healthy participants: A randomized, double-blind, placebo-controlled trial.

Euglena gracilis (Euglena) is a microalgae found in most freshwater environments that produces paramylon, an insoluble ß-1,3-glucan linked to human immunity. We hypothesized that Euglena powder has effects on immune function in apparently healthy adults. The study included male or female volunteers between the ages of 20 and 70 years who had white blood cell counts ranging from 4 × 103/µL to 10 × 103/µL, a "severe" rating on the stress questionnaire from the Korea National Health and Nutrition Examination Survey, and at least 2 upper respiratory infections with cold-like symptoms in the previous year. Participants received either a placebo or 700 mg of Euglena powder daily for 8 weeks. The study measured natural killer cell activity, cytokine concentrations, and blood lipid profiles to confirm the immune effect of Euglena consumption. In conclusion, Euglena improved immunological function through natural killer cell activity. Safety assessment showed no significant changes in vital signs or clinical chemistry indicators, and there were no adverse events associated with Euglena consumption. Euglena supplementation may help boost the immune systems of healthy individuals.

Noni fruit extract ameliorates alcohol-induced hangover symptoms by reducing the concentrations of alcohol and acetaldehyde in a Sprague Dawley rat model and a human intervention study.

Various studies have reported that Noni shows various health effects. This study aimed to assess the ability of Noni fruit extract to serve as a single active functional ingredient for the alleviation of hangover symptoms in Sprague Dawley rats and healthy subjects in a single-dose, randomized, double-blind, crossover, placebo-controlled study. The rats were orally administered Noni fruit extract at 50 or 100 mg per kg body weight (B.W.) and HOVENIA. The blood ethanol (EtOH) and acetaldehyde concentrations were significantly lower in the 100 mg per kg B.W. group than in the EtOH group. Alcohol dehydrogenase and aldehyde dehydrogenase activity tended to increase in the 100 mg kg-1 B.W. group. In the human study, 30 subjects received either a placebo or Noni fruit extract (1 g). The Noni fruit extract group showed significantly faster time point at which the maximum concentration (Tmax) of alcohol than in the placebo group. In addition, blood acetaldehyde levels and diarrhea at 40 and 720 min after alcohol intake and the area under the curve between 40 and 60 min of acetaldehyde were significantly decreased in the Noni fruit extract group compared to the placebo group. According to the QUalitative INteraction Trees, subjects who were ≤36 years old who consumed more alcohol (>15 drinks per week) and had a higher total hangover score (>27.5 and 33) presented significantly lower blood acetaldehyde levels and less severe hangover symptoms. These results indicate that Noni fruit extract has the potential to improve hangover symptoms by decreasing alcohol and acetaldehyde levels.

A comparative investigator-initiated pilot study on the efficacy and safety of biodegradable microneedle acupuncture and conventional intradermal acupuncture for dry eye patient: A superiority, assessor-blinded, randomized controlled trial.

BACKGROUND: The prevalence of dry eye, which is a common lacrimal disease, is steadily increasing in modern society. However, fundamental treatment for it has not yet been established. This study aims to assess the efficacy and safety of a novel medical device, the biodegradable microneedle acupuncture (BMA), using a traditional intradermal acupuncture needle as the control acupuncture for dry eye. METHOD: This study will be an investigator-initiated, assessor-blinded, comparative, superiority pilot randomized controlled trial. A total of 30 patients with dry eye will be randomly assigned to the experimental or the control group in equal proportion. For the experimental group, the BMA will be applied to both sides of 5 acupoints including BL2, GB14, TE23, EX-HN5, and ST1. For the control group, conventional intradermal acupuncture will be applied to the same acupoints. The needles will be attached for 4 hours. Over 4 weeks, both the interventions will be performed 12 times in total. The primary outcome would be the ocular surface disease index. The secondary outcomes would be the visual analog scale for subjective symptoms, quality of life, Schirmer I test, and general assessment. DISCUSSION: The findings of this study on the efficacy and safety of the BMA would be helpful for patients with dry eye in clinical practice. Further, these results would provide for the foundation of a large-scale BMA study.

Beneficial Effects of a Combination of Curcuma longa L. and Citrus junos Against Beta-Amyloid Peptide-Induced Neurodegeneration in Mice.

Both Curcuma longa (CL) and Citrus junos Tanaka (CJ) have been used to treat various diseases due to their anti-inflammatory and antioxidative stress activities. In this study, we investigated the ameliorative effect of the combination of CL extract and CJ extract (CCC) against beta-amyloid (Aß) peptide-induced neurological damage. CCC prevented neurocytotoxicity in vitro. In addition, it was confirmed that abnormal alternation behavior and memory impairment caused by Aß peptide were reversed by treatment with CCC. Furthermore, CCC treatment led to recovery of the cholinergic system and reactive oxygen species (ROS) oxidative damage defense system. CCC induced expressions of cyclic-adenosine monophosphate response element-binding protein (CREB)-responsive element-binding protein and brain-derived neurotrophic factor were confirmed as was the significantly improved processing in the hippocampus of the mouse Aß peptides. Accordingly, these results suggest that CCC can prevent and/or reverse neurocytotoxicity and cognitive deficits in a mouse model of Alzheimer's disease.

Effect of Mori ramulus on the postprandial blood glucose levels and inflammatory responses of healthy subjects subjected to an oral high-fat/sucrose challenge: A double-blind, randomized, crossover clinical trial.

Blood glucose is inadequately controlled in diabetes mellitus, causing various inflammation-related complications. This study aimed to investigate responses to an oral sucrose/lipid challenge in the context of glucose metabolism after consumption of Mori ramulus (MR) extract. In this study on healthy subjects, the optimal dose and safety of MR were confirmed in a preliminary pilot trial (n = 24), meanwhile, blood glucose, insulin, and inflammatory marker levels were detected via an oral sucrose/lipid tolerance test in the main trial (n = 36). In the main study, the blood glucose response was significantly decreased after 240 min in the MR group. Compared to the placebo group, the treatment group exhibited plasma insulin levels that were significantly increased at 120 min and decreased at 240 min. In conclusion, a single MR extract dose protects against inflammation induced by high-fat/sugar to maintain normal insulin secretion and thus helps to maintain postprandial blood glucose levels via an inflammatory mechanism.

Aucuparin Suppresses Bleomycin-Induced Pulmonary Fibrosis Via Anti-Inflammatory Activity.

Idiopathic pulmonary fibrosis (IPF) is a lung disease that results in scarring of the lungs for an unknown reason. Although many studies have been conducted on IPF, precise mechanisms and treatments have not yet been identified. In this study, we found that aucuparin, a natural product isolated from Sorbus aucuparia, inhibited pulmonary fibrosis in a bleomycin (BLM)-induced lung fibrosis mouse model. In the lung samples of mice treated with aucuparin, the gene expression of inflammation and macrophage activation markers was reduced compared to those treated with BLM alone. Moreover, aucuparin decreased the expression of profibrotic marker genes and increased the expression of antifibrotic marker genes. Finally, we observed that aucuparin significantly suppressed transforming growth factor-ß-induced activation of inflammatory cytokine production and collagen synthesis from macrophages and fibroblasts, respectively. Taken together, these data demonstrate that aucuparin inhibits lung fibrosis via its anti-inflammatory action and support its potential to be a therapeutic drug for IPF treatment.

The fruit of Acanthopanax senticosus Harms improves arterial stiffness and blood pressure: a randomized, placebo-controlled trial.

BACKGROUND/OBJECTIVES: Arterial stiffness and endothelial dysfunction are 2 of the independent predictors for cardiovascular disease, while Acanthopanax senticosus Harms (ASH) is a traditional medicinal plant that can improve cardiovascular health. This study aimed to investigate the efficacy of the fruit of ASH on vascular function in apparently healthy subjects. SUBJECTS/METHODS: A 12-week, randomized, double-blind, placebo-controlled design, consisting of healthy adults with at least 2 of the following 3 conditions: borderline high blood pressure (BP; 120 mmHg ≤ systolic BP ≤ 160 mmHg or 80 mmHg ≤ diastolic BP ≤ 100 mmHg), smoking (≥10 cigarettes/day), and borderline blood lipid levels (220 ≤ total cholesterol ≤ 240, 130 ≤ low density lipoprotein cholesterol ≤ 165, or 150 ≤ triglyceride ≤ 220 mg/dL). Randomly assigned 76 subjects who received a placebo or 2 doses of ASH fruit (low, 500 mg/day; high, 1,000 mg/day) completed the intervention. Brachial-ankle pulse wave velocity (baPWV), flow-mediated dilation, carotid intima-media thickness, and BP were measured both at baseline and following the 12-week intervention. Endothelial nitric oxide synthase (eNOS) phosphorylation was assessed by western blotting. RESULTS: Compared with the placebo group, the low-dose group showed more significant changes after the 12-week intervention period in terms of systolic BP (0.1 vs. -7.7 mmHg; P = 0.044), baPWV (31.3 vs. -98.7 cm/s; P = 0.007), and the ratio of phospho-eNOS/eNOS (0.8 vs. 1.22; P = 0.037). CONCLUSIONS: These results suggest that ASH fruit extract at 500 mg/day has the potential to improve BP and arterial stiffness via endothelial eNOS activation in healthy adults with smoking and the tendency of having elevated BP or blood lipid parameters. TRIAL REGISTRATION: Clinical Research Information Service Identifier: KCT0001072.

Plumbagin Suppresses Pulmonary Fibrosis via Inhibition of p300 Histone Acetyltransferase Activity.

Idiopathic pulmonary fibrosis (IPF) is a chronic fibrosing interstitial lung disease with a poor prognosis similar to that of malignancy. The causes of IPF are not clearly known, and there is no effective therapy to date. In this study, the natural compound plumbagin, which was isolated from Plumbago rosea root extract, was screened for p300 inhibitory activity. Plumbagin specifically inhibited the activity of p300 toward histone acetyltransferases. Plumbagin treatment significantly suppressed transforming growth factor-ß-induced profibrotic target-gene expression and proliferation of fibroblast cell lines. Moreover, plumbagin significantly inhibited bleomycin-induced pulmonary fibrosis in mice. Taken together, these data demonstrate the inhibitory effects of plumbagin on lung fibrosis and its promise as a therapeutic agent for IPF.

Analysis of plasma metabolic profiling and evaluation of the effect of the intake of Angelica keiskei using metabolomics and lipidomics.

ETHNOPHARMACOLOGICAL RELEVANCE: Angelica keiskei contains many bioactive components with anti-oxidative and anti-inflammatory effects. It is also effective for the treatment of diabetes mellitus, hypertension, and arteriosclerosis, but the relationships between these effects and the active components in the herb have not been studied. AIM OF THE STUDY: We aimed to confirm the effects of Angelica keiskei on humans. MATERIALS AND METHODS: A metabolomics and lipidomics study was performed using human plasma samples from 20 subjects after the intake of Angelica keiskei, and the components of Angelica keiskei in the plasma were profiled. UPLC-Orbitrap-MS was used to analyze the plasma and plant extracts, and multivariate analysis and correlation studies between the exogenous components from plant and endogenous metabolite in plasma were performed. RESULTS: The levels of the 14 metabolites including kynurenic acid, prostaglandin E1, chenodeoxycholic acid, lysoPC (18:1), lysoPC (18:2), lysoPC (20:3), lysoPC (20:4), lysoPC (22:6), PC (34:1), PC (34:2), PC (38:3), PC (38:4), PC (38:6) and PC (40:7) in the plasma were changed. By monitoring the components originating from Angelica keiskei in plasma, five components including 5-methoxypsoralen, 8-methoxypsoralen, 4-hydroxyderricin, xanthoangelol B and xanthoangelol F were detected and they reduced the levels of bile acids and fatty acids. CONCLUSIONS: The levels of the metabolites, including bile acids, amino acids, glycerophospholipids and fatty acids, in the plasma were changed, and 14 significantly changed metabolites were closely related to the preventive effect against liver diseases, type 2 diabetes, anemia, obesity, atherosclerosis, depression and anti-inflammatory effects. The five components of Angelica keiskei were related the modulatory activity of reducing the levels of bile acids and fatty acids.

Potential Therapeutic Applications of Bee Venom on Skin Disease and Its Mechanisms: A Literature Review.

Skin is larger than any other organ in humans. Like other organs, various bacterial, viral, and inflammatory diseases, as well as cancer, affect the skin. Skin diseases like acne, atopic dermatitis, and psoriasis often reduce the quality of life seriously. Therefore, effective treatment of skin disorders is important despite them not being life-threatening. Conventional medicines for skin diseases include corticosteroids and antimicrobial drugs, which are effective in treating many inflammatory and infectious skin diseases; however, there are growing concerns about the side effects of these therapies, especially during long-term use in relapsing or intractable diseases. Hence, many researchers are trying to develop alternative treatments, especially from natural sources, to resolve these limitations. Bee venom (BV) is an attractive candidate because many experimental and clinical reports show that BV exhibits anti-inflammatory, anti-apoptotic, anti-fibrotic, antibacterial, antiviral, antifungal, and anticancer effects. Here, we review the therapeutic applications of BV in skin diseases, including acne, alopecia, atopic dermatitis, melanoma, morphea, photoaging, psoriasis, wounds, wrinkles, and vitiligo. Moreover, we explore the therapeutic mechanisms of BV in the treatment of skin diseases and cytotoxic effects of BV on skin disease-causing pathogens, including bacteria, fungi and viruses.

Preliminary Comparison of the Efficacy and Safety of Needle-Embedding Therapy with Acupuncture for Atopic Dermatitis Patients.

OBJECTIVES: Among Traditional Korean Medicine approaches, needle-embedding therapy is used in various fields and consistently studied; however, there have been no clinical studies of the treatment of adult atopic dermatitis (AD) with needle-embedding therapy. Thus, there is a need to investigate the effects of needle-embedding therapy for treatment of AD. This study was performed to identify possible effects of needle-embedding therapy at Quchi acupoint (LI11) on AD and to compare these effects with those of acupuncture therapy. METHODS: A total of 14 participants were enrolled in this study. Participants received acupuncture or needle-embedding treatments for 4 weeks and then were followed for an additional 2 weeks because of safety assessment. The participants were divided into 2 groups: the acupuncture group, receiving treatment at Quchi acupoint (LI11) 3 times per week, and the needle-embedding group, receiving treatment at Quchi acupoint (LI11) once per week. The groups were compared on the basis of the SCORing Atopic Dermatitis (SCORAD) index, Transepidermal Water Loss (TEWL), skin hydration, and Dermatology Life Quality Index (DLQI) at baseline and 1 week after treatment was completed (5th week). RESULTS: The SCORAD index, TEWL, Skin hydration, and DLQI at 1 week after treatment were significantly improved in both groups (p<0.05). However, there were no significant differences between the acupuncture and needle-embedding groups in any of the main evaluation indices (p>0.05). The study participants received a total of 84 acupuncture treatments or 28 needle-embedding treatments. No adverse events occurred during the study period. CONCLUSIONS: Based on changes in the SCORAD index, TEWL, skin hydration, and DLQI value, we found that both needle-embedding and acupuncture treatments at the Quchi acupoint (LI11) were effective in decreasing the symptoms of AD and exhibited similar therapeutic effects, which suggests that needle-embedding treatment may be more clinically convenient than acupuncture, with longer effects and fewer treatments.

Ameliorative Effects of Dendropanax morbifera on Cognitive Impairment Via Enhancing Cholinergic Functions and Brain-Derived Neurotrophic Factor Expression in ß-Amyloid-Induced Mice.

Alzheimer's disease accounts for the majority of dementia and shows hallmarks such as sequential cognitive dysfunction and abnormal behavior. Dendropanax morbifera (DM) has traditionally been used to treat a variety of diseases in East Asia. The aim of this study was to assess the therapeutic effects of DM on brain neuron damage and on cognitive deficit in neuronal cell induced by Aß1-42 in mice. Treatment with DM reduced the levels of intracellular reactive oxygen species and protected against the death of neuronal cells induced by Aß1-42 peptide. In addition, it was also found that pretreatment with DM decreased cognitive damage induced by Aß peptide via enhancing the cholinergic system and antioxidant defense system in mice. Furthermore, the study verified that the change in the expression of both cyclic-adenosine monophosphate response element binding protein and of brain-derived neurotrophic factor in the hippocampus in Aß peptide-treated mice was significantly ameliorated after treatment with DM. Accordingly, these results suggest that pretreatment with DM defends against oxidative stress and cognitive impairment caused by Aß peptide.

Differential responses of endothelial integrity upon the intake of microencapsulated garlic, tomato extract or a mixture: a single-intake, randomized, double-blind, placebo-controlled crossover trial.

This study investigated the effect of microencapsulated garlic and/or tomato on endothelial dysfunction induced by the PhenFlex test (PFT) in healthy male smokers. In a randomized, double-blind, placebo-controlled crossover trial, 41 healthy male smokers were randomly assigned to one of four groups to receive the test groups (in microencapsulated garlic powder, tomato extract and a mixture thereof) or the placebo group. Proteomic biomarkers related to endothelial integrity were measured in plasma. Microencapsulated garlic, tomato extract and the mixture affected endothelial integrity biomarkers differently. Garlic consumption increased prothrombin time and decreased SAA and IL-12. Tomato extract intake increased activated partial thrombin time and decreased d-dimer, SAA, sVCAM-1, IL-13 and MCP-3 levels. Consumption of the mixture increased sE-selectin and lowered D-dimer, SAA, IL-13 and IL-10 responses after PFT challenge for 6 h. The different responses became clearer under high compliance in the dietary restriction groups. This single-intake clinical trial addressed the different responses of biomarkers related to endothelial integrity.

Standardized Mori ramulus extract improves insulin secretion and insulin sensitivity in C57BLKS/J db/db mice and INS-1 cells.

Abnormalities in the hyperbolic relationship between insulin sensitivity and insulin secretion may cause oxidative stress and non-enzymatic glycation, resulting in an increased risk of type 2 diabetes. Here, we performed a 14-week study to investigate the effects of ethanolic extract of Mori ramulus (MRE; 0, 800, and 1600mg/kg body weight) and its signature component oxyresveratrol (OXY; 800mg/kg body weight) on ß-cell dysfunction and insulin resistance in C57BLKS/J db/db mice fed with a high-fat diet. Compared with the diabetic control group, the high-dose MRE group showed a significant decrease in fasting blood glucose (p=0.0024); a significant increase in insulin secretion as measured by insulin (p=0.0012) and C-peptide (p=0.0103) levels in plasma and insulin content (p=0.0440) and homeobox factor-1 protein expression (p=0.0148) in the pancreas; and a significant increase in insulin sensitivity as measured by insulin receptor mRNA expression in the liver (p=0.0179) and adipose tissue (p=0.0491). In addition, improvements in the reactive oxygen species level and inflammatory pancreatic and hepatic tissue damage were also observed in the MRE group as assessed by histological findings. A similar but weaker effect was found in the OXY group. Furthermore, we observed a potentiating effect of MRE and OXY on insulin secretion in INS-1 cells in the presence of 27mM glucose, together with an anti-glycation effect as indicated by methylglyoxal-trapping capacity and inhibition of advanced glycation end-product formation. Taken together, these data suggest that MRE could ameliorate ß-cell dysfunction and insulin resistance by reducing oxidative damage and advanced glycation end-product (Wagenknecht et al., 2003) formation and that these effects are due, at least in part, to OXY.

Delphinidin induces apoptosis via cleaved HDAC3-mediated p53 acetylation and oligomerization in prostate cancer cells.

Delphinidin is a major anthocyanidin compound found in various fruits. It has anti-inflammatory, anti-oxidant, and various other biological activities. In this study, we identified the epigenetic modulators that mediate the apoptotic effect of delphinidin in human prostate cancer cells. We found that treatment of LNCaP cells (a p53 wild-type, human prostate cancer cell line) with delphinidin increased caspase-3, -7, and -8 activity, whereas it decreased histone deacetylase activity. Among class I HDACs, the activity of HDAC3 was specifically inhibited by delphinidin. Moreover, the induction of apoptosis by delphinidin was dependent on caspase-mediated cleavage of HDAC3, which results in the acetylation and stabilization of p53. We also observed that delphinidin potently upregulated pro-apoptotic genes that are positively regulated by p53, and downregulated various anti-apoptotic genes. Taken together, these results show that delphinidin induces p53-mediated apoptosis by suppressing HDAC activity and activating p53 acetylation in human prostate cancer LNCaP cells. Therefore, delphinidin may be useful in the prevention of prostate cancer.

Acanthopanax divaricatus var. chiisanensis reduces blood pressure via the endothelial nitric oxide synthase pathway in the spontaneously hypertensive rat model.

In this study, we investigated the antihypertensive effects of Acanthopanax divaricatus var. chiisanensis extract (AE) and its active compound, acanthoside D (AD), on arterial blood pressure (BP) in vivo and endothelial function in vitro. We hypothesized that AE has antihypertensive effects, which is attributed to enhancement of endothelial function via the improvement of nitric oxide synthesis or the angiotensin II (Ang II) response. Spontaneously hypertensive rats (SHRs) and Wistar-Kyoto rats (WKYs) were randomly divided into 7 groups and then fed the following diets for 14 weeks: WKY fed a normal diet (WN); SHR fed a normal diet (SN); SHR fed a high-cholesterol (HC) diet (SH); SHR fed a HC diet with AE of 150, 300, 600 mg/kg body weight (SH-L, SH-M, SH-H); and SHR fed an HC diet with AD of 600 µg/kg body weight (SH-D). Blood pressure was significantly reduced in the SH-H compared with the SH from week 10 until week 14; BP was also significantly decreased in the SHR fed a HC diet with AE of 300 at week 14. Aortic wall thickness showed a tendency to decrease by AE and AD treatment. The SH-H showed increased endothelial nitric oxide synthase (eNOS) expression in the intima and media, compared with the SH. Furthermore, a significant increase in intracellular nitric oxide production was induced by AE and AD treatment in human umbilical vein endothelial cells. A significant increase of phospho-eNOS was found with a high dose of AE in human umbilical vein endothelial cells but not with AD. These results suggest that AE can regulate BP and improve endothelial function via eNOS-dependent vasodilation.

Effects of Panax ginseng on glial cell-derived neurotrophic factor (GDNF) expression and spermatogenesis in rats.

Panax ginseng (PG) is a medicinal herb which has been used to improve male reproduction in traditional Korean medicine. This study investigated the effect of PG on spermatogenesis and the regulation of glial cell-derived neurotrophic factor (GDNF), which has a crucial role in spermatogonial stem cell maintenance. PG was administered to 8-week-old male Wistar rats (1.0 g/kg/day, p.o.) for 56 consecutive days, the sperm formation period of the rat. Sperm analysis, RT-PCR and western blot assays were then carried out. The PG-treated group had significantly enhanced sperm counts, GDNF mRNA level and protein level. These results suggest that PG induces spermatogenesis and GDNF activation in rat testes.