Diss. (sammanfattning) Stockholm : Karol. inst. / Härtill 5 uppsatser.

published_or_final_version / Medical Sciences / Master / Master of Medical Sciences

Diss. (sammanfattning) Stockholm : Karolinska institutet, 2006. / Härtill 5 uppsatser.

Thesis (M. Med. Sc.)--University of Hong Kong, 2004. / Also available in print.

Song Jing-mei. / Thesis submitted in: December 1998. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 141-156). / Abstract also in Chinese. / Title page --- p.i / Acknowledgments --- p.ii / Table of contents --- p.iii / Abbreviations --- p.viii / Abstract --- p.x / 摘要 --- p.xii / Chapter Chapter1 --- Introduction --- p.1 / Chapter Chapter2 --- Evaluation of Antiulcer Effect Exhibited by Hippophae rhamnoides Using Different Ulcer Models / Chapter 2.1 --- Introduction --- p.20 / Chapter 2.1.1 --- Ethanol-induced gastric lesions --- p.24 / Chapter 2.1.2 --- NSAID-induced gastric lesions --- p.24 / Chapter 2.1.3 --- Stress-induced gastric lesions --- p.25 / Chapter 2.1.4 --- Pylorus ligation-induced gastric lesions --- p.25 / Chapter 2.1.5 --- Acetic acid-induced chronic gastric ulcer --- p.26 / Chapter 2.1.6 --- Necrotizing agent-induced lesion model --- p.27 / Chapter 2.2 --- Materials and Methods / Chapter 2.2.1 --- Plant materials --- p.28 / Chapter 2.2.2 --- Identification of the plant --- p.28 / Chapter 2.2.3 --- Preparation of crude extract for animal studies --- p.28 / Chapter 2.2.4 --- Experimental animals --- p.31 / Chapter 2.2.5 --- Ethanol-induced gastric mucosal lesions --- p.31 / Chapter 2.2.6 --- Acidified aspirin-induced gastric lesions --- p.32 / Chapter 2.2.7 --- Water immersion plus restraint-induced stress lesion model --- p.32 / Chapter 2.2.8 --- Pylorus ligation-induced gastric lesions --- p.32 / Chapter 2.2.9 --- Acetic acid-induced chronic gastric ulcer --- p.34 / Chapter 2.2.10 --- Necrotizing agent-induced gastric lesions --- p.34 / Chapter 2.2.11 --- Test of acute toxicity of Hippophae --- p.35 / Chapter 2.2.12 --- Statistical analysis --- p.35 / Chapter 2.3 --- Results / Chapter 2.3.1 --- Effect of Hr extract on ethanol-induced gastric lesions --- p.36 / Chapter 2.3.2 --- Effect of Hr extract on aspirin-induced gastric damage --- p.39 / Chapter 2.3.3 --- Effect of Hr extract on stress-induced gastric lesions --- p.40 / Chapter 2.3.4 --- Effect of Hr extract on pylorus ligation-induced gastric injury --- p.43 / Chapter 2.3.5 --- Effect of Hr extract on acetic acid-induced chronic ulcer --- p.48 / Chapter 2.3.6 --- Effect of Hr extract on necrotizing agent-induced gastric damage --- p.54 / Chapter 2.3.7 --- Test of acute toxicity of Hr --- p.55 / Chapter 2.4 --- Discussion / Chapter 2.4.1 --- Cytoprotective effect of Hr against ethanol-induced lesions --- p.56 / Chapter 2.4.2 --- Preventive effect of Hr on NSAIDs-induced gastric lesions --- p.57 / Chapter 2.4.3 --- Inhibitory effect of Hr on stress-induced lesions --- p.58 / Chapter 2.4.4 --- Inhibitory effect of Hr extract on pylorus ligation-induced gastric lesions --- p.59 / Chapter 2.4.5 --- Healing effect of Hr extract on acetic acid-induced gastric ulcer --- p.60 / Chapter 2.4.6 --- Protective effect of Hr extract on necrotizing agent-induced gastric damage --- p.61 / Chapter 2.4.7 --- Summary --- p.61 / Chapter Chapter3 --- Study on Cytoprotective Effect of Hippophae rhamnoides on Ethanol-induced Gastric Damage / Chapter 3.1 --- Introduction --- p.63 / Chapter 3.2 --- Materials and Methods --- p.65 / Chapter 3.2.1 --- Chemicals and Instruments --- p.65 / Chapter 3.2.2 --- Test on effect of different concentrations of ethanol on gastric mucosa --- p.67 / Chapter 3.2.3 --- Examination of the gastric protective effect of Hr extract by different routes of administration --- p.68 / Chapter 3.2.4 --- Study on relationship between gastric protective effect of Hr extract and endogenous PGs --- p.68 / Chapter 3.2.5 --- Measurement of gastric mucosal blood flow (GMBF) --- p.69 / Chapter 3.2.6 --- Measurement of gastric secretion and acidity in gastric juice --- p.70 / Chapter 3.2.7 --- Measurement of gastric gastric emptying rate --- p.70 / Chapter 3.2.8 --- Measurement of pepsin content in gastric juice --- p.71 / Chapter 3.2.9 --- Measurement of protein content in gastric juice --- p.73 / Chapter 3.2.10 --- Measurement of mucus content on gastric wall --- p.75 / Chapter 3.2.11 --- Measurement of GSH content in gastric mucosa --- p.77 / Chapter 3.2.12 --- Measurement of PGE2 content in gastric mucosa --- p.79 / Chapter 3.2.13 --- Determination of protein content in gastric mucosa --- p.81 / Chapter 3.3 --- Results / Chapter 3.3.1 --- Test on gastric lesions induced by different concentrations of ethanol --- p.83 / Chapter 3.3.2 --- Effect of Hr extract on ethanol-induced gastric damage by different routes of administration --- p.83 / Chapter 3.3.3 --- Effect of Hr extract on GMBF and output of gastric acid --- p.85 / Chapter 3.3.4 --- Effect of Hr extract on gastric emptying rate --- p.87 / Chapter 3.3.5 --- Effect of Hr extract on gastric mucus --- p.88 / Chapter 3.3.6 --- Effect of Hr extract on gastric GSH content --- p.89 / Chapter 3.3.7 --- Influence of Hr extract on endogenous prostanglandin-E2 --- p.90 / Chapter 3.3.8 --- Antagonistic effect of indomethacin on the gastric protection of Hr extract --- p.91 / Chapter 3.4 --- Discussion / Chapter 3.4.1 --- Formation of gastric lesions induced by ethanol at different concentrations --- p.92 / Chapter 3.4.2 --- Different routes of administration --- p.92 / Chapter 3.4.3 --- "Role of GMBF, gastric acidity and acid output in the formation of gastric lesions" --- p.93 / Chapter 3.4.4 --- Effect of Hr extract on gastric motility --- p.95 / Chapter 3.4.5 --- Effect of Hr extract on gastric mucus --- p.96 / Chapter 3.4.6 --- Effect of Hr extract on gastric GSH content --- p.96 / Chapter 3.4.7 --- Effect of Hr extract on endogenous prostaglandins --- p.98 / Chapter 3.4.8 --- Summary --- p.99 / Chapter Chapter 4 --- Study on plant constituents of Hippophae rhamnoides / Chapter 4.1 --- Introduction --- p.100 / Chapter 4.2 --- Materials and Methods --- p.100 / Chapter 4.2.1 --- Plant Materials --- p.100 / Chapter 4.2.2 --- Plant Extraction --- p.101 / Chapter 4.2.3 --- Fractionation of hexane-extract by column chromatography --- p.103 / Chapter 4.2.4 --- Phytochemical identification and analyses of vitamin content in Hr extract --- p.104 / Chapter 4.2.4.1 --- Identification of vitamin A and vitamin C in the Hr extract by TLC --- p.104 / Chapter 4.2.4.2 --- Identification of α-tocopherol and γ-tocopherol by HPLC --- p.105 / Chapter 4.2.4.3 --- Analyses of the content of α-tocopherol in the Hr extract --- p.108 / Chapter 4.2.4.4 --- Identification and analysis of fatty acid in the Hr fractions --- p.111 / Chapter 4.2.4.4.1 --- Esterification of fatty acids --- p.111 / Chapter 4.2.4.4.2 --- Isolation and identification of FAME by GC-MS --- p.111 / Chapter 4.2.4.5 --- Quantitative analysis of composition and relative content of fatty acid in the Hr fractions --- p.112 / Chapter 4.3 --- Results / Chapter 4.3.1 --- Phytochemical analysis and identification --- p.114 / Chapter 4.3.1.1 --- Identification of vitamin A --- p.114 / Chapter 4.3.1.2 --- Identification of vitamin C --- p.115 / Chapter 4.3.1.3 --- Identification of α-tocopherol and γ-tocopherol --- p.116 / Chapter 4.3.1.4 --- Quantitative analysis of α-tocopherol content in the Hr extract --- p.117 / Chapter 4.3.1.5 --- Identification of fatty acid composition --- p.117 / Chapter 4.3.1.6 --- Analysis of relative content of fatty acids in the Hr extract --- p.122 / Chapter 4.3.1.7 --- Study on phytosterols of Hr --- p.124 / Chapter 4.3.2 --- Examination of antiulcer effect of Hr fractions against ethanol-induced gastric lesions --- p.124 / Chapter 4.3.2.1 --- Effect of different extracts of Hr seed on ethanol-induced gastric lesions --- p.125 / Chapter 4.3.2.2 --- Effect of fractions of hexane-extract of Hr on gastric lesions induced by ethanol --- p.126 / Chapter 4.3.2.3 --- Effect of Hr components on gastric lesions induced by different ulcer models --- p.127 / Chapter 4.3.2.3.1 --- Effect of Hr components on ethanol-induced lesions --- p.127 / Chapter 4.3.2.3.2 --- Effect of Hr components against stress-induced gastric lesions --- p.128 / Chapter 4.3.2.3.3 --- Effect of β-sitosterol against gastric lesions induced by pylorus ligation --- p.129 / Chapter 4.4 --- Discussion / Chapter 4.4.1 --- Role of fatty acids in the stomach protection --- p.130 / Chapter 4.4.2 --- Role of vitamins in the gastric protection --- p.133 / Chapter 4.4.3 --- Role of plant terpenoids in the stomach --- p.134 / Chapter 4.4.4 --- Summary --- p.135 / Chapter Chapter 5 --- General discussion --- p.136 / References --- p.141

Orientadores: João Ernesto de Carvalho, Mary Ann Foglio, Lucia Tasca Gois Ruiz / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-11T14:23:42Z (GMT). No. of bitstreams: 1 Jorge_MichellePedroza_M.pdf: 2723510 bytes, checksum: d0521f341cbca8308beb772206b9dd69 (MD5) Previous issue date: 2008 / Resumo: As folhas de Arrabidaea chica (Humb. & Bonpl.) Verlot (Bignoniaceae), popularmente conhecida como Crajiru, são utilizadas na medicina popular como cicatrizante, antiinflamatória e no tratamento de cólicas intestinais. O presente trabalho descreve os efeitos cicatrizante, antiinflamatório, antiulcerogênico e antioxidante do extrato bruto metanólico das folhas de Arrabidaea chica. O extrato estimulou o crescimento de fibroblastos, in vitro, de forma proporcional à concentração utilizada com atividade similar à alantoina. Também estimulou a produção in vitro de colágeno de maneira semelhante ao ácido ascórbico. Nos ensaios de DPPH e Folin-Ciocalteau, o extrato bruto apresentou moderada ação antioxidante. A aplicação tópica do extrato bruto em modelos experimentais do processo cicatrizante in vivo reduziu em 96% a área cutânea ulcerada após dez dias de tratamento, enquanto o grupo salina apresentou redução de somente 36%. Em modelos de úlcera gástrica em ratos induzida por etanol, o extrato bruto de A. chica reduziu o índice de lesões em 90%. Apesar do uso popular em processos inflamatórios, esse extrato não reduziu o edema de pata induzido por carragenina nem o edema de orelha induzido por óleo de cróton em ratos. Esses resultados permitem concluir que o extrato bruto metanólico das folhas secas de Arrabidaea chica possui princípios ativos que ativam o processo cicatricial, através da proliferação de fibroblastos e síntese de colágeno, confirmando o uso popular cicatrizante desta espécie / Abstract: Arrabidaea chica (Humb. & Bonpl.) Verlot (Bignoniaceae) leaves, popularly known as Crajiru, are employed in folk medicine for wound healing, anti-inflammatory, and intestinal colic. Herein we report the in vitro and in vivo healing, antulcerogenic, antiinflamatory and antioxidant activities of Arrabidaea chica crude methanolic extracts. A. chica crude methanolic extract stimulated cell growth in a concentration dependent way and demonstrated similar effect as allantoin and vitamin C increasing in vitro collagen production. Also, A. chica crude extract demonstrated moderate scavenger effect (DPPH assay) and moderate reducing effect (Folin-Ciocalteau reagent). Wound healing experimental models in rats reduced in 96% the wounds size after ten days treatment, whereas saline group showed only 36% wound healing. Antiulcerogenic experimental models in rats showed gastroprotective activity, redution of 90%, by measuring ulceration lesion index (ULI). The Arrabidaea chica crude extract showed no antiinflamatory activity. The crude extract¿s efficiency seems to involve fibroblast growing stimulus and collagen synthesis both in vitro and in vivo, beyond the moderate scavenging activity and antiulcerogenic activity, corroborating with the folk use of this plant species / Mestrado / Ciencias Basicas / Mestre em Clinica Medica

Diss. (sammanfattning) Stockholm : Karol inst., 2004. / Härtill 4 uppsatser.