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Bitter melon: a panacea for inflammation and cancer 被引量:15
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作者 Prasad R. Dandawate Dharmalingam Subramaniam +1 位作者 Subhash B. Padhye Shrikant Anant 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2016年第2期81-100,共20页
Nature is a rich source of medicinal plants and their products that are useful for treatment of various diseases and disorders. Momordica charantia, commonly known as bitter melon or bitter gourd, is one of such plant... Nature is a rich source of medicinal plants and their products that are useful for treatment of various diseases and disorders. Momordica charantia, commonly known as bitter melon or bitter gourd, is one of such plants known for its biological activities used in traditional system of medicines. This plant is cultivated in all over the world, including tropical areas of Asia, Amazon, east Africa, and the Caribbean and used as a vegetable as well as folk medicine. All parts of the plant, including the fruit, are commonly consumed and cooked with different vegetables, stir-fried, stuffed or used in small quantities in soups or beans to give a slightly bitter flavor and taste. The plant is reported to possess anti-oxidant, anti-inflammatory, anti-cancer, anti-diabetic, anti-bacterial, anti-obesity, and immunomodulatory activities. The plant extract inhibits cancer cell growth by inducing apoptosis, cell cycle arrest, autophagy and inhibiting cancer stem cells. The plant is rich in bioactive chemical constituents like cucurbitane type triterpenoids, triterpene glycosides, phenolic acids, flavonoids, essential oils, saponins, fatty acids, and proteins. Some of the isolated compounds (Kuguacin J, Karaviloside XI, Kuguaglycoside C, Momordicoside Q-U, Charantin, a-eleostearic acid) and proteins (a-Momorcharin, RNase MC2, MAP30) possess potent biological activity. In the present review, we are summarizing the anti-oxidant, anti-inflammatory, and anti-cancer activities of Momordica charantia along with a short account of important chemical constituents, providing a basis for establishing detail biological activities of the plant and developing novel drug molecules based on the active chemical constituents. 展开更多
关键词 Momordica charantia bitter melon Anti-oxidant activity Anti-inflammatory activity Anti-cancer activity Na^n'al products
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Comparison of antioxidant capacity and α-glucosidase inhibitory activity between bitter melon(Momardica charanti) fruit and leaf extract 被引量:1
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作者 Eun-Sun Hwang 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2018年第4期189-193,共5页
Objective:To compare the physiologically active substances,antioxidant and anti diabetic activities in vitro of bitter melon fruit and leaf extract.Methods:Total polyphenol and flavonoid contents were measured using s... Objective:To compare the physiologically active substances,antioxidant and anti diabetic activities in vitro of bitter melon fruit and leaf extract.Methods:Total polyphenol and flavonoid contents were measured using spectrophotometrically by gallic acid and catechin standard curves,respectively.The radical-scavenging potential of bitter melon fruit and leaf extract were measured by DPPH,ABTS and hydroxyl radical scavenging ability and reducing power and anti-diabetic ability was evaluated byα-glucosidase activity.Results:It was confirmed that the bitter melon leaf contained more total polyphenols and flavonoidsthan bitter melon fruits.Bitter melon leaf extract contained 2.8-fold and 4.9-fold higher total polyphenols and flavonoids than bitter melon fruits,respectively.The DPPH radical scavenging activity of bitter melon leaf was 5.81-and 5.70-fold higherthan that of the bitter melon frui,based on200μg/mL and 400μg/mL of the extract,respectively.In ABTS,hydroxyl radical scavenging ability and reducing power,the bitter melon leaf extract all showed higher antioxidant capacity than the bitter melon fruit.Bitter melon fruit showed 2.52-and 2.63-fold higherα-glucosidase inhibitory activity than bitter melon leaf extract at 200μg/mL and 400μg/mL,respectively.Conclusions:Based on our results,bitter melon may improve antidiabetic effects by upreguatingα-glycosidase activity.Even,bitter melon leaf extract shows higher antioxidant potential than its fruit but bitter melon leaf extract does not show higherα-glucosidase inhibitory potential than bitter melon fruit.The overall results support that bitter melon fruit and leaf may have specific torget effects on antidiabetic and antioxidant,respectively. 展开更多
关键词 bitter melon POLYPHENOLS FLAVONOIDS ANTIOXIDANT Antidia betic
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The Use of HPLC in Determination of Endogenous Hormones in Anthers of Bitter Melon 被引量:4
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作者 Yi Tang Li Wang Chao Ma Ji Liu Bin Liu Huanxiu Li 《Journal of Life Sciences》 2011年第2期139-142,共4页
A simple, rapid and perfect extraction and determination method for the endogenous hormones in anthers of bitter melon with reversed-phase high performance liquid chromatography (HPLC) has been developed. The HPLC s... A simple, rapid and perfect extraction and determination method for the endogenous hormones in anthers of bitter melon with reversed-phase high performance liquid chromatography (HPLC) has been developed. The HPLC system consisted of Hypersil ODS C 18 reverse phase column (150 mm × 4.6 mm, 5 μm) with a methanol gradient in 0.6% acetic acid and UV detector set at 254 nm. The results showed that the method was accurate and efficient. 展开更多
关键词 HPLC endogenous hormones bitter melon (Momordica eharantia L.)
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Bitter Melon Powder Protects against Obesity-associated Fatty Liver Disease by Improving Colonic Microenvironment in Rats with High-fat Diet-induced Obesity
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作者 BAI Juan ZHU Ying DONG Ying 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2017年第8期611-615,共5页
This study explored how bitter melon powder (BMP) alters the colonic microenvironment during the development of obesity-associated fatty liver in rats. We observed that BMP effectively inhibited the body weight gain... This study explored how bitter melon powder (BMP) alters the colonic microenvironment during the development of obesity-associated fatty liver in rats. We observed that BMP effectively inhibited the body weight gain and lipid accumulation in the liver, ameliorated glucose intolerance, and increased the colon weight after an 8-week treatment compared to that in the high-fat diet (HFD) group. BMP significantly decreased fecal water toxicity towards HT-29 cells, as revealed by the cell counting kit (CCK)-8 assay results, and the mRNA expression of Toll-like receptor 4 (TLR4) in colon mucosa. Additionally, gut permeability in the BMP group was restored to normal levels. Finally, BMP alleviated the inflammatory state of the rat colon mucosa and liver tissues as well as the systemic inflammation. 展开更多
关键词 RNA bitter melon Powder Protects against Obesity-associated Fatty Liver Disease by Improving Colonic Microenvironment in Rats with High-fat Diet-induced Obesity BMP Figure TLR
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Exploring the mechanism of action bitter melon in the treatment ofbreast cancer by network pharmacology
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作者 Kavan Panchal Bhavya Nihalani +2 位作者 Utsavi Oza Aarti Panchal Bhumi Shah 《World Journal of Experimental Medicine》 2023年第5期142-155,共14页
BACKGROUND Bitter melon has been used to stop the growth of breast cancer(BRCA)cells.However,the underlying mechanism is still unclear.AIM To predict the therapeutic effect of bitter melon against BRCA using network p... BACKGROUND Bitter melon has been used to stop the growth of breast cancer(BRCA)cells.However,the underlying mechanism is still unclear.AIM To predict the therapeutic effect of bitter melon against BRCA using network pharmacology and to explore the underlying pharmacological mechanisms.METHODS The active ingredients of bitter melon and the related protein targets were taken from the Indian Medicinal Plants,Phytochemistry and Therapeutics and SuperPred databases,respectively.The GeneCards database has been searched for BRCA-related targets.Through an intersection of the drug’s targets and the disease’s objectives,prospective bitter melon anti-BRCA targets were discovered.Gene ontology and kyoto encyclopedia of genes and genomes enrichment analyses were carried out to comprehend the biological roles of the target proteins.The binding relationship between bitter melon’s active ingredients and the suggested target proteins was verified using molecular docking techniques.RESULTS Three key substances,momordicoside K,kaempferol,and quercetin,were identified as being important in mediating the putative anti-BRCA effects of bitter melon through the active ingredient-anti-BRCA target network study.Heat shock protein 90 AA,proto-oncogene tyrosine-protein kinase,and signal transducer and activator of transcription 3 were found to be the top three proteins in the proteinprotein interaction network study.The several pathways implicated in the anti-BRCA strategy for an active component include phosphatidylinositol 3-kinase/protein kinase B signaling,transcriptional dysregulation,axon guidance,calcium signaling,focal adhesion,janus kinase-signal transducer and activator of transcription signaling,cyclic adenosine monophosphate signaling,mammalian CONCLUSION Overall,the integration of network pharmacology,molecular docking,and functional enrichment analyses shed light on potential mechanisms underlying bitter melon’s ability to fight BRCA,implicating active ingredients and protein targets,as well as highlighting the major signaling pathways that may be altered by this natural product for therapeutic benefit. 展开更多
关键词 bitter melon Momordica charantia Network pharmacology Molecular docking Breast cancer Indian Medicinal Plants Phytochemistry and Therapeutics
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Extraction of Flavonoids from Bitter Melon 被引量:2
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作者 Sing Pei Tan Sophie E. Parks +1 位作者 Costas E. Stathopoulos Paul D. Roach 《Food and Nutrition Sciences》 2014年第5期458-465,共8页
Bitter melon, Momordica charantia L, is a popular traditional medicinal fruit in tropical and subtropical countries. It has been linked with therapeutic effects, some of which are likely due to its flavonoids. To dete... Bitter melon, Momordica charantia L, is a popular traditional medicinal fruit in tropical and subtropical countries. It has been linked with therapeutic effects, some of which are likely due to its flavonoids. To determine its total flavonoid content (TFC) and to prepare extracts for use as nutritional supplements or ingredients for nutraceutical functional foods, various solvents have been used, including water, which is the preferred solvent because it is inexpensive, safe and environmentally friendly. The study aimed to extract bitter melon, using five solvents (ethanol, methanol, n-butanol, acetone and water) before and after the optimal conditions for water were determined in terms of extraction temperature, time, ratio of water to bitter melon (mL/g) and number of times the same material was extracted. The TFC of six varieties of bitter melon was also determined. Acetone was the best of the five solvents for extracting flavonoids from the Moonlight variety (23.2 mg Rutin Equivalents (RE)/g). Even after increasing the extraction by 88% (1.24 vs 0.66 mg RE/g) using optimised conditions for the aqueous extraction (two extractions at 40℃ for 15 min at a ratio of 100:1 mL/g of bitter melon powder), the flavonoids extracted from the Moonlight variety using water was very little (5.4%) compared to acetone. Furthermore, using acetone, it was shown that the Moonlight variety (23.2 mg RE/g) bought at a local market had higher levels of flavonoids than the greenhouse-grown Jade (15.3 mg RE/g), Niddhi (16.9 mg RE/g), Indra (15.0 mg RE/ g), Hanuman (3.9 mg RE/g) and White (6.9 mg RE/g) varieties. Therefore, acetone was the best solvent for extracting flavonoids from bitter melon and the aqueous extraction could only be improved to extract 5.4% of the flavonoids extracted with acetone from the Moonlight variety, which had the highest TFC of the six varieties of bitter melon. 展开更多
关键词 FLAVONOIDS bitter melon ACETONE AQUEOUS EXTRACTIONS
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Bitter Melon (Momordica Charantia) Reduces Serum Sialic Acid in Type2 Diabetics: Evidence to Delay the Process of Atherosclerosis
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作者 Inayat Ur Rahman Mohammad Bashir +2 位作者 Mohammad Salman Mohammad Idrees Mohammad Iqbal Khan 《Chinese Medicine》 2011年第4期125-129,共5页
More than 1000 herbal products have been used by diverse cultures of the world to treat hyperglycemia and among them bitter melon (Momordica charantia) is one of the most popular herbal resource. The beneficial effect... More than 1000 herbal products have been used by diverse cultures of the world to treat hyperglycemia and among them bitter melon (Momordica charantia) is one of the most popular herbal resource. The beneficial effects of bitter melon is not limited to hypoglycaemia only, but it also ameliorates diet induced obesity, insulin resistance and exhibit cardioprotective effects. The present study attempts to investigate the effect of bitter melon fruit juice on a newly investigated risk factor, sialic acid in type2 diabetics. A total of 40 type2 diabetic patients, divided into group A (n = 20) and group B (n = 20) were investigated during the present study. The patients of group A were following bitter melon fruit juice treatment along with diet control, whereas the patients of group B were on diet control only. Serum sialic acid (SSA) decreased in group A from 66.20 ± 2.30 mg/dl to 63.50 ± 2.10 mg/dl (<0.11) but, increased in group B from 66.50 ± 1.70 mg/dl to 68.20 ± 2.50 mg/dl (<0.12), compared to baseline. Post-treatment between group comparison revealed a significant difference (<0.05). The beneficial effects on fasting plasma glucose (FPG) and glycohemoglobin (HbA1-c) were also greater in group A compared to group B as was the case with blood lipids, weight and blood pressure. The study provides another mechanism for the cardioprotective effect of bitter melon and further strengthens its value in the management of type2 diabetes. 展开更多
关键词 Sialic Acid Type2 Diabetes MELLITUS bitter melon CARDIOVASCULAR Disease
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Revealing the specific regulations of nitric oxide on the postharvest ripening and senescence of bitter melon fruit
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作者 Hongwei Wang Ling Li +9 位作者 Lili Ma Alisdair R.Fernie Anzhen Fu Chunmei Bai Zhaoze Sang Susu Guo Fan Zhang Qing Wang Yanyan Zheng Jinhua Zuo 《aBIOTECH》 EI CAS CSCD 2024年第1期29-45,共17页
Bitter melon fruit is susceptible to yellowing,softening,and rotting under room-temperature storage conditions,resulting in reduced commercial value.Nitric oxide(NO)is an important signaling molecule and plays a cruci... Bitter melon fruit is susceptible to yellowing,softening,and rotting under room-temperature storage conditions,resulting in reduced commercial value.Nitric oxide(NO)is an important signaling molecule and plays a crucial role in regulating the fruit postharvest quality.In this study,we investigated the effects of NO treatment on changes in sensory and firmness of bitter melon fruit during postharvest storage.Moreover,transcriptomic,metabolomic,and proteomic analyses were performed to elucidate the regulatory mechanisms through which No treatment delays the ripening and senescence of bitter melon fruit.Our results show that differentially expressed genes(DEGs)were involved in fruit texture(CSLE,β-Gal,and PME),plant hormone signal transduction(ACS,JAR4,and AUX28),and fruit flavor and aroma(SUS2,LOX,and GDH2).In addition,proteins differentially abundant were associated with fruit texture(PLY,PME,and PGA)and plant hormone signal transduction(PBL15,JAR1,and PYL9).Moreover,No significantly increased the abundance of key enzymes involved in the phenylpropanoid biosynthetic pathway,thus enhancing the disease resistance and alleviating softening of bitter melon fruit.Finally,differential metabolites mainly included phenolic acids,terpenoids,and flavonoids.These results provide a theoretical basis for further studies on the physiological changes associated with postharvest ripening and senescence of bitter melon fruit. 展开更多
关键词 bitter melon NO treatment POSTHARVEST Ripening and senescence
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Diverse roles of bitter melon(Momordica charantia)in prevention of oral cancer
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作者 Subhayan Sur Ratna B.Ray 《Journal of Cancer Metastasis and Treatment》 2021年第1期178-188,共11页
Oral squamous cell carcinoma(OSCC)is one of the common lethal malignancies which is increasing rapidly in the world.Increasing risks from alcohol and tobacco habits,lack of early detection markers,lack of effective ch... Oral squamous cell carcinoma(OSCC)is one of the common lethal malignancies which is increasing rapidly in the world.Increasing risks from alcohol and tobacco habits,lack of early detection markers,lack of effective chemotherapeutic agents,recurrence and distant metastasis make the disease more complicated to manage.Laboratory-based studies and epidemiological studies indicate important roles of nutraceuticals to manage different cancers.The plant bitter melon(Momordica charantia)is a good source of nutrients and bio-active phytochemicals such as triterpenoids,triterpene glycosides,phenolic acids,flavonoids,lectins,sterols and proteins.The plant is widely grown in Asia,Africa,and South America.Bitter melon has traditionally been used as a folk medicine and Ayurvedic medicine in Asian culture to treat diseases such as diabetes,since ancient times.The crude extract and some of the isolated pure compounds of bitter melon show potential anticancer effects against different cancers.In this review,we shed light on its effect on OSCC.Bitter melon extract has been found to inhibit cell proliferation and metabolism,induce cell death and enhance the immune defense system in the prevention of OSCC in vitro and in vivo.Thus,bitter melon may be used as an attractive chemopreventive agent in progression towards OSCC clinical study. 展开更多
关键词 bitter melon(Momordica charantia) oral squamous cell carcinoma signal transduction cancer metabolism immune system cancer prevention
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苹果苦瓜有机种植技术集成研究 被引量:2
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作者 王会 《襄阳职业技术学院学报》 2025年第2期94-97,共4页
苹果苦瓜有机施肥及病虫害防治技术的集成研究表明,与常规的施肥和病虫害防治技术相比,有机施肥及病虫害防治技术虽然不能使苹果苦瓜的单果重和产量显著增加,但能使采收期延长,病毒病、白粉病、霜霉病发病率显著降低,瓜果中糖度、VC、... 苹果苦瓜有机施肥及病虫害防治技术的集成研究表明,与常规的施肥和病虫害防治技术相比,有机施肥及病虫害防治技术虽然不能使苹果苦瓜的单果重和产量显著增加,但能使采收期延长,病毒病、白粉病、霜霉病发病率显著降低,瓜果中糖度、VC、皂苷、类黄酮及可溶性固形物的含量增加,瓜果着色均匀、大小均匀,提高了苹果苦瓜的营养价值和商品率。 展开更多
关键词 苹果苦瓜 有机种植 集成技术
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福建省苦瓜产业发展的制约因素与路径优化
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作者 雷文华 《东南园艺》 2025年第4期427-434,共8页
苦瓜作为药食同源的重要瓜类蔬菜.在福建省农业经济中占有独特地位。本研究基于乡村振兴科特派服务团项目实地调研与实践,分析福建省苦瓜产业化发展的现状,从资源环境、科研力量、经济效益、生产创新、市场需求、健康追求、各方合作、... 苦瓜作为药食同源的重要瓜类蔬菜.在福建省农业经济中占有独特地位。本研究基于乡村振兴科特派服务团项目实地调研与实践,分析福建省苦瓜产业化发展的现状,从资源环境、科研力量、经济效益、生产创新、市场需求、健康追求、各方合作、项目支撑、政策支持等方面对福建省苦瓜产业化发展进行梳理,分析福建省苦瓜产业化发展的优势条件和制约因素,同时从体系建设、种业创新、人才培养、标准化建设、规模化发展、提升经济效益、延伸产业链条、打造品牌等方面提出苦瓜产业化发展路径优化建议,以期为推动福建省苦瓜产业绿色高质量发展提供决策参考。 展开更多
关键词 苦瓜产业 经济效益 健康消费 标准化 品牌建设
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基于网络药理学和动物实验探究苦瓜改善2型糖尿病合并高脂血症的药效机制
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作者 李伟智 周政 +1 位作者 朱春胜 边猛 《河南中医》 2025年第9期1385-1397,共13页
目的:基于网络药理学及分子对接探讨苦瓜改善2型糖尿病(type 2 diabetes mellitus, T2DM)合并高脂血症的作用机制,并采用动物实验进行验证。方法:通过文献检索结合相关数据库检索苦瓜的化学成分及其相关靶点和T2DM与高脂血症疾病相关靶... 目的:基于网络药理学及分子对接探讨苦瓜改善2型糖尿病(type 2 diabetes mellitus, T2DM)合并高脂血症的作用机制,并采用动物实验进行验证。方法:通过文献检索结合相关数据库检索苦瓜的化学成分及其相关靶点和T2DM与高脂血症疾病相关靶点。利用Venny网站取药物活性成分相关靶点与疾病靶点的交集,共同靶点即为苦瓜治疗T2DM合并高脂血症的潜在靶点。采用STRING11.0数据库构建共同靶点的蛋白质-蛋白质相互作用(protein-protein interaction, PPI)网络,拓扑分析筛选核心靶点。借助R4.3.0软件对潜在靶点进行基因本体(Gene Ontology, GO)富集分析和京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes, KEGG)信号通路富集分析。借助Cytoscape3.8.0软件构建“活性成分-潜在靶点-信号通路”网络。采用AutoDock Vina软件对核心靶点和成分进行分子对接。SPF级雄性C57BL/6J小鼠适应性喂养一周后,分为正常组和建模组,建模组小鼠采用高脂饲料喂养联合腹腔注射50 mg·kg^(-1)链脲佐菌素溶液建立T2DM合并高脂血症模型。将模型复制成功的小鼠分为正常组、模型组、二甲双胍组(0.25 g·kg^(-1)·d^(-1))和苦瓜组(0.56 g·kg^(-1)·d^(-1)),持续给药4周。采用生化试剂盒及ELISA试剂盒检测糖脂代谢及氧化应激相关指标;HE染色观察胰腺和肝脏组织病理变化;Western blot检测磷脂酰肌醇-3-激酶(phosphoinositide-3-kinase, PI3K)、蛋白激酶B(protein kinase B,PKB,又称AKT)、磷酸化AKT(phospho-AKT,p-AKT)蛋白表达水平。结果:本研究共获得13个苦瓜的化学成分和592个成分靶点;筛选到1 392个疾病相关靶点,取活性成分相关靶点与疾病相关靶点的交集,共获得202个共同靶点。PPI网络分析筛选出TNF、AKT1、TP53、ESR1、INS和RELA 6个核心基因。GO富集分析发现生物学过程3 118条,细胞组成98条,分子功能198条。KEGG富集分析得到195条信号通路。分子对接表明,核心靶标与成分间呈现出良好的结合力。与正常组相比,模型组小鼠空腹血糖、糖化血清蛋白、胰岛素及胰岛素抵抗指数显著升高(P<0.01);甘油三酯(triglyceride, TG)、总胆固醇(total cholesterol, TC)、低密度脂蛋白胆固醇(low-density lipoprotein cholesterol, LDL-C)及丙二醛(malondialdehyde, MDA)水平显著升高(P<0.01),高密度脂蛋白胆固醇(high-density lipoprotein cholesterol, HDL-C)、谷胱甘肽(glutathione, GSH)、谷胱甘肽过氧化物酶(glutathione peroxidase, GSH-PX)、超氧化物歧化酶(superoxide dismutase, SOD)及p-AKT/AKT与PI3K蛋白表达水平显著降低(P<0.005)。与模型组相比,苦瓜组小鼠空腹血糖、糖化血清蛋白、胰岛素及胰岛素抵抗指数显著降低(P<0.01);TG、TC、LDL-C及MDA水平显著降低(P<0.05),GSH、GSH-PX、SOD及p-AKT/AKT与PI3K蛋白表达水平显著升高(P<0.05)。HE染色显示,苦瓜可显著改善T2DM合并高脂血症小鼠胰岛功能损伤及T2DM状态下肝脏组织脂质堆积。结论:苦瓜可能通过作用于PI3K-AKT信号通路调节氧化应激,发挥改善T2DM合并高脂血症的作用。 展开更多
关键词 2型糖尿病 高脂血症 PI3K-AKT信号通路 苦瓜 网络药理学 分子对接 小鼠
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贝莱斯芽孢杆菌N46对苦瓜白粉病的防治机理研究 被引量:10
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作者 项佳胤 商桑 田丽波 《热带作物学报》 CSCD 北大核心 2024年第6期1292-1302,共11页
为探究贝莱斯芽孢杆菌N46对苦瓜白粉病的防治机理,以前期分离得到的贝莱斯芽孢杆菌N46处理盆栽苦瓜,通过检测白粉病病原菌Podosphaera xanthii的孢子萌发率、叶片防御酶活性的变化、活性氧积累、细胞过敏性坏死、木质素积累、抗病相关... 为探究贝莱斯芽孢杆菌N46对苦瓜白粉病的防治机理,以前期分离得到的贝莱斯芽孢杆菌N46处理盆栽苦瓜,通过检测白粉病病原菌Podosphaera xanthii的孢子萌发率、叶片防御酶活性的变化、活性氧积累、细胞过敏性坏死、木质素积累、抗病相关基因表达量的变化以及抗病表现的依赖途径,开展N46的防治机理研究。结果表明:高浓度(6×10^(8) CFU/mL)的贝莱斯芽孢杆菌N46对苦瓜白粉病的防治效果达到59.05%;N46处理的苦瓜在病原菌侵染时其防御酶过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性的变化幅度和峰值出现了大幅增加,活性氧(ROS)积累显著增加,过敏性坏死率显著提高,显著增强了细胞壁的木质素积累率,同时观察到N46对叶面白粉病病原菌孢子萌发有显著的抑制作用。本研究检测了经N46处理的苦瓜的抗病相关基因:茉莉酸(jasmonic acid,JA)反应性标记脂氧合酶基因(LOC111018837)、水杨酸(salicylic acid,SA)反应性标记基因(LOC111017362)、与过敏反应和细胞壁强化相关的过氧化物酶基因(LOC111021192)表达量的变化,与对照相比,这些基因在苦瓜被白粉病菌侵染时表达量显著增加,其中处理组的JA反应性标记基因在未接触病原菌时也高于对照组的表达水平。说明N46处理的苦瓜在未接触病原菌时即保持了一定水平的抗性基因的“预启动”,而在病原菌侵染时才出现更高的表达水平。通过布洛芬(IBU)抑制植株的JA反应途径,使贝莱斯芽孢杆菌N46对于苦瓜白粉病的防效几乎消失,表明N46诱导的苦瓜白粉病抗性的产生依赖于JA途径。综上所述,贝莱斯芽孢杆菌N46通过抑制叶面白粉病菌孢子萌发和诱导苦瓜产生依赖于JA途径的抗病性起到对苦瓜白粉病的良好防治效果。本研究为苦瓜白粉病的生物防治提供了新方法,为贝莱斯芽孢杆菌对苦瓜白粉病的防治作用提供理论依据。 展开更多
关键词 贝莱斯芽孢杆菌 苦瓜白粉病 防治机理 诱导抗性
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NO处理对苦瓜采后贮藏品质的影响 被引量:2
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作者 王红伟 张帆 +4 位作者 马丽丽 郑鄢燕 左进华 王清 李玲 《食品研究与开发》 CAS 2024年第4期24-30,共7页
为研究NO处理对苦瓜果实采后贮藏品质的影响,采用0.25 mmol/L的外源NO供体硝普钠(sodium nitroprusside,SNP)溶液对苦瓜进行20 min浸泡处理,(20±1)℃下贮藏,定期测定苦瓜果实感官品质、硬度、可溶性固形物含量、色差、乙烯释放量... 为研究NO处理对苦瓜果实采后贮藏品质的影响,采用0.25 mmol/L的外源NO供体硝普钠(sodium nitroprusside,SNP)溶液对苦瓜进行20 min浸泡处理,(20±1)℃下贮藏,定期测定苦瓜果实感官品质、硬度、可溶性固形物含量、色差、乙烯释放量、叶绿素含量、总酚含量、类黄酮含量及相关抗氧化酶活性。结果表明:与对照相比,NO处理可较好地维持苦瓜果实硬度、降低乙烯释放量、减轻叶绿素降解,减少可溶性固形物消耗,有效保持总酚、类黄酮等抗氧化物质的含量,抑制苦瓜中过氧化物酶、过氧化氢酶和抗坏血酸过氧化物酶活性的降低,从而延缓苦瓜果实衰老并保持其贮藏品质。 展开更多
关键词 一氧化氮 苦瓜 采后 贮藏品质 抗氧化能力
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金铃子果皮多糖超声辅助提取工艺优化及其抗氧化和降糖活性研究 被引量:9
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作者 康桥 孙越 +6 位作者 刘梦瑶 赵保龙 李贺贺 王柏文 赵东瑞 孙宝国 孙金沅 《食品工业科技》 CAS 北大核心 2024年第21期164-173,共10页
本研究拟探究金铃子多糖的提取工艺、理化性质、抗氧化和降糖活性。以新鲜金铃子果实的果皮为原料,基于单因素实验结果,对超声辅助提取(UAE)过程中的液料比、超声时间和超声功率进行Box-Behnken响应面优化,并以最佳条件进行超声萃取。... 本研究拟探究金铃子多糖的提取工艺、理化性质、抗氧化和降糖活性。以新鲜金铃子果实的果皮为原料,基于单因素实验结果,对超声辅助提取(UAE)过程中的液料比、超声时间和超声功率进行Box-Behnken响应面优化,并以最佳条件进行超声萃取。分级醇沉得到两个多糖组分WBP50和WBP75,对其理化性质、体外抗氧化和降血糖能力进行评价。结果表明:在液料比16 mL/g,超声时间16 min,超声功率312 W的条件下,金铃子粗多糖实际得率8.33%±0.13%;WBP50和WBP75的总糖、蛋白质、总酚、总黄酮和糖醛酸含量分别为76.73%/73.38%、4.78%/0.35%、0.36%/0.25%、2.06%/0.86%和72.85%/49.58%;WBP50和WBP75平均分子量分别为27.59 kDa和23.20 kDa,主要由半乳糖醛酸、半乳糖、鼠李糖、阿拉伯糖、葡萄糖组成;两种金铃子多糖对DPPH、ABTS+和羟基自由基的清除能力分别为11.28/11.40μg Trolox/mg、40.87/44.42μg Trolox/mg和52.47/99.89 U/mg。在降血糖方面,WBP50和WBP75都具有一定的α-淀粉酶活性抑制能力和较强的α-葡萄糖苷酶活性抑制能力,在浓度750μg/mL时对α-葡萄糖苷酶的抑制率可高达93.34%±1.11%和79.04%±0.76%。超声辅助提取金铃子多糖的工艺具有省时方便、高效率耗能低的优点,且所提取的金铃子多糖具有天然的抗氧降糖功能活性,本研究为未来金铃子多糖的结构解析及功能活性作用机制研究奠定基础,为金铃子多糖的降糖产品开发及高值化利用提供理论参考。 展开更多
关键词 金铃子 多糖 响应面试验 抗氧化活性 Α-葡萄糖苷酶
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冷等离子体处理对饲用苦瓜嫁接苗成活率的影响
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作者 张丽丽 王德成 +4 位作者 唐欣 邵长勇 尤泳 惠云婷 张晓明 《农业工程》 2024年第6期50-55,共6页
为探讨冷等离子体种子处理技术对饲用苦瓜嫁接苗成活率及后期长势的影响,通过冷等离子体技术对饲用苦瓜砧穗组合进行处理,研究了冷等离子体种子处理对饲用苦瓜砧穗组合的伤面愈合、成活率、长势、抗性和商品性等的影响,调查隔离层和愈... 为探讨冷等离子体种子处理技术对饲用苦瓜嫁接苗成活率及后期长势的影响,通过冷等离子体技术对饲用苦瓜砧穗组合进行处理,研究了冷等离子体种子处理对饲用苦瓜砧穗组合的伤面愈合、成活率、长势、抗性和商品性等的影响,调查隔离层和愈伤组织形成的天数、处理后饲用苦瓜砧穗组合的成活率和生长量数据、饲用苦瓜嫁接苗定植成活率、饲用苦瓜抗病情况及饲用苦瓜果肉厚度的情况,并进行数据分析。结果表明,合适工艺处理砧穗组合可以缩短愈合时间1~2 d,接穗成活率显著提高,接穗生长量提高1.17%~7.62%,果皮厚度增加1.75%~8.77%。该处理方式克服了现有饲用苦瓜嫁接苗伤口愈合慢、伤口二次感染等缺陷,定植后植株发病率降低、抗逆性增强及商品性提高,因此具有良好的使用和推广价值。 展开更多
关键词 冷等离子体 饲用苦瓜 砧穗组合 嫁接苗 伤面愈合 成活率
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苦瓜提取物硒铬酵母组合物辅助降血糖功效研究 被引量:1
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作者 张雪 朱梦良 +3 位作者 朱娅敏 黄亚群 陈智仙 程倩 《中国食品添加剂》 CAS 2024年第5期258-263,共6页
为研究苦瓜提取物、硒酵母、铬酵母组合物辅助降血糖效果,开展人体试食试验。本研究受试组52例,对照组53例,共采集到有效试验者105例。试食组每日服用苦瓜硒铬酵母胶囊,对照组服用安慰剂,连续服用60天,检测相关指标。试食组空腹血糖下降... 为研究苦瓜提取物、硒酵母、铬酵母组合物辅助降血糖效果,开展人体试食试验。本研究受试组52例,对照组53例,共采集到有效试验者105例。试食组每日服用苦瓜硒铬酵母胶囊,对照组服用安慰剂,连续服用60天,检测相关指标。试食组空腹血糖下降率5.52%,有效率48.08%;餐后2 h血糖下降率10.18%,有效率59.62%。试验后,两组空腹血糖有效率差异显著(P<0.05),餐后2 h血糖有效率差异显著(P<0.01);试食组空腹血糖、餐后2h血糖、糖化血红蛋白、血脂四项指标均无明显升高,餐后2 h血糖平均下降幅度≥10%。试验期间未见与受试品或安慰剂有关的不良反应,并且受试者的安全性检查指标均未见明显变化或异常现象,根据评价标准,认为苦瓜提取物、硒、铬组合物具有辅助降血糖功能。 展开更多
关键词 苦瓜提取物 硒酵母 铬酵母 辅助降血糖功效
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苦瓜采后热处理对其抗冷性的影响 被引量:21
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作者 董华强 蒋跃明 +3 位作者 汪跃华 黄剑波 林丽超 宁正祥 《农业工程学报》 EI CAS CSCD 北大核心 2005年第5期186-191,共6页
提高苦瓜的抗冷性对于采后苦瓜保鲜有重要意义。新采收苦瓜分别经38℃10min、42℃5min和50℃1min热浸处理后,以塑料薄膜包装在4℃下贮藏16d。结果表明:42℃热浸苦瓜感官品质最好,无明显冷害发生,细胞膜透性最低,过氧化氢酶活性下降显著... 提高苦瓜的抗冷性对于采后苦瓜保鲜有重要意义。新采收苦瓜分别经38℃10min、42℃5min和50℃1min热浸处理后,以塑料薄膜包装在4℃下贮藏16d。结果表明:42℃热浸苦瓜感官品质最好,无明显冷害发生,细胞膜透性最低,过氧化氢酶活性下降显著减缓,过氧化物酶活性明显受抑;50℃热浸苦瓜冷害发生明显,感官品质迅速下降,细胞膜透性显著提高,过氧化氢酶活性的下降速度和过氧化物酶活性的上升速度均明显提高;38℃热浸苦瓜的感官品质、冷害及其它生理生化指标变化介于上述两处理之间。这说明,适当的热浸处理可以有效地提高采后苦瓜的抗冷性,延长保鲜期。 展开更多
关键词 苦瓜 热处理 冷害 过氧化氢酶 过氧化物酶 细胞膜透性
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苦瓜叶片结构与白粉病抗性的关系 被引量:28
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作者 田丽波 商桑 +2 位作者 杨衍 司龙亭 李丹丹 《西北植物学报》 CAS CSCD 北大核心 2013年第10期2010-2015,共6页
以不同抗白粉病的苦瓜品系幼苗为材料,对它们的叶片及上下表皮厚度、栅栏组织及海绵组织厚度、叶片结构紧密度及疏松度、蜡质含量、比叶重、气孔及茸毛密度等叶片结构进行观察比较,探讨苦瓜白粉病抗性与其主要叶片结构指标的关系。结果... 以不同抗白粉病的苦瓜品系幼苗为材料,对它们的叶片及上下表皮厚度、栅栏组织及海绵组织厚度、叶片结构紧密度及疏松度、蜡质含量、比叶重、气孔及茸毛密度等叶片结构进行观察比较,探讨苦瓜白粉病抗性与其主要叶片结构指标的关系。结果显示:(1)抗病苦瓜品系叶片的蜡质含量显著高于感病品系,与病情指数呈显著负相关关系,蜡质层是其抵抗和延迟病原菌侵入的一个有力结构屏障。(2)感病品系叶片的气孔和叶背面茸毛数量显著多于抗病品系,且叶背面的气孔及茸毛密度与病情指数呈显著正相关关系,即气孔和茸毛越少越抗病。(3)抗病苦瓜品系的叶片栅栏组织以及海绵组织排列整齐、紧密,而高感品系的叶片组织出现大量孔隙,较难观察到完整细胞。(4)抗病品系叶片厚度、下表皮厚度、栅栏组织厚度、叶片结构紧密度明显高于感病品系,而感病品系的海绵组织厚度、叶片结构疏松度明显高于抗病品系;且苦瓜比叶重与其白粉病抗性关系不大。研究认为,苦瓜叶片蜡质含量、叶背面气孔及茸毛密度可以作为苦瓜白粉病抗性鉴定的参考指标。 展开更多
关键词 苦瓜 叶片结构 白粉病 抗性
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苦瓜总皂苷降血糖及抗氧化作用的研究 被引量:22
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作者 李健 张令文 +2 位作者 黄艳 陈姝娟 刘鑫 《食品科学》 EI CAS CSCD 北大核心 2007年第9期518-520,共3页
目的:探讨了苦瓜总皂苷对小鼠的降血糖及抗氧化作用。方法:按30、60、120mg/kgbw给小鼠连续灌喂30d,测空腹血糖值、血清中超氧化物歧化酶活力、血清中丙二醛(MDA)含量。结果:苦瓜总皂苷对高血糖模型小鼠具有明显降低血糖作用和抗氧化能... 目的:探讨了苦瓜总皂苷对小鼠的降血糖及抗氧化作用。方法:按30、60、120mg/kgbw给小鼠连续灌喂30d,测空腹血糖值、血清中超氧化物歧化酶活力、血清中丙二醛(MDA)含量。结果:苦瓜总皂苷对高血糖模型小鼠具有明显降低血糖作用和抗氧化能力的恢复作用,且高剂量组降血糖作用和恢复抗氧化能力的效果较好。 展开更多
关键词 苦瓜 总皂苷 降血糖 抗氧化
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