OBJECTIVETo study the chemical constituents of the leaves of pineapple.

METHODChromatographic methods were used to isolate compounds from the leaves of pineapple and spectral methods were used to identify the structures of the isolated compounds.

RESULTCompound 1 was isolated from the leaves of pineapple. It was identified as 1-O-beta-D-glucopyranosyl-(2S, 3R, 4E, 11E)-2-[(2(R)-hydroxydocosanoyl) amido]-4, 11-hexadecanediene-1, 3-diol.

CONCLUSIONCompound 1 was a new compound.

Ananas ; chemistry ; Cerebrosides ; chemistry ; isolation & purification ; Molecular Conformation ; Molecular Structure ; Plant Leaves ; chemistry ; Plants, Medicinal ; chemistry

The purpose of this study was to identify dietitians' perception and purchasing pattern of fruits in elementary school lunch program. This study was conducted using mail survey from September 15 to October 30, 2006. Survey questionnaire was developed based on in-depth interview with three school food service dietitians. A total of 100 school food service dietitians in Seoul were participated. Based on the frequency analysis results, over half of respondents(69%) provides fruits every week, and 23% of respondents provides them twice a week. Strawberry, watermelon, apple, and mandarin were identified as the most frequently served fruits in Spring, Summer, Fall, and Winter, respectively. Sixty two percent of respondents indicated they offered imported fruits, such as banana and pineapple, less than 10% of total fruits. Ninety three percent of respondents selected private contract when they purchase fruits, and forty four percent of dietitians decided fruits purchasing procedure by themselves. Respondents addressed "Apples and Pears were appropriate for a dessert." and "Apples and Pears supply nutrition such as calorie and vitamin." as the advantages of offering apples and pears in school lunch menu. They also indicated difficulty in preparation work and many leftovers as the disadvantages of offering apples and pears. When purchasing apples and pears, dietitians considered taste as the first criteria and price as the second. Respondents perceived that elementary school students preferred apples and pears in a neutral level. Respondents also had higher preference for an-sim apples which can be eaten without peeling for school lunch menu and higher intentions to provide in school lunch menu. The survey results also found that respondents' intention to offer apples in school lunch menu was higher than intentions to offer pears. The implications to increase the chance of fruits offering in school lunch menu were discussed.
Ananas ; Citrullus ; Surveys and Questionnaires ; Food Services ; Fragaria ; Fruit* ; Humans ; Intention ; Lunch* ; Malus* ; Musa ; Nutritionists ; Postal Service ; Pyrus* ; Seoul

Objectives: The study was performed in order compare the antihelminthic efficacy of pineapple fruit versus mebendazole in schoolchildren. Design: The study performed was a single, blinded randomized control trial. Subjects: Ninety subjects aged 5 to 13 years old and positive for soil-transmitted helminthiases were included in the study. Methods: Eligible participants were subjected to Kato-Katz for diagnosis and quantitative ova count. Those positive for soil-transmitted helminthes were randomized to Group A (pineapple) and Group B (mebendazole). After 7 days of treatment, stool samples were subjected to another Kato Katz for quantitative ova analysis. Seven hundred fifty ml of puree made from one pineapple, with approximate weight of 750g, was given in divided amounts within 24 hours (250 ml 3x a day) for group A. Results: Majority (77.78%) were infected with Ascaris lumbricoides. Pineapple exhibited a significant improvement in egg reduction rate (RR) with a p-value of < 0.001 at 95% CI. This showed 83.5 % egg per gram (epg) of feces reduction and a cure rate of 68.9%. Mebendazole also revealed a significant egg reduction with p-value of < 0.001 at 95% CI. It also showed a remarkable egg per gram reduction rate of 92.25% and cure rate of 88.9%. There were no adverse events reported. Conclusion: Mebendazole, as an antihelminthic, is a better choice; but pineapple fruit may be beneficial as it had a high egg reduction rate and an acceptable cure rate.
Human ; Animal ; Male ; Female ; Adolescent ; Child ; Child Preschool ; ANANAS ; ASCARIASIS ; TRICHURIS ; PLANTS ; FRUIT ; PARASITIC DISEASES ; TREATMENT OUTCOME

BACKGROUND/OBJECTIVES: The prevalence of food allergies in Korean children aged 6 to 12 years increased from 10.9% in 1995 to 12.6% in 2012 according to nationwide population studies. Treatment for food allergies is avoidance of allergenic-related foods and epinephrine auto-injector (EPI) for accidental allergic reactions. This study compared knowledge and perception of food allergy labeling and dietary practices of students. SUBJECTS/METHODS: The study was conducted with the fourth to sixth grade students from an elementary school in Yongin. A total of 437 response rate (95%) questionnaires were collected and statistically analyzed. RESULTS: The prevalence of food allergy among respondents was 19.7%, and the most common food allergy-related symptoms were urticaria, followed by itching, vomiting and nausea. Food allergens, other than 12 statutory food allergens, included cheese, cucumber, kiwi, melon, clam, green tea, walnut, grape, apricot and pineapple. Children with and without food allergy experience had a similar level of knowledge on food allergies. Children with food allergy experience thought that food allergy-related labeling on school menus was not clear or informative. CONCLUSION: To understand food allergies and prevent allergic reactions to school foodservice among children, schools must provide more concrete and customized food allergy education.
Allergens ; Ananas ; Bivalvia ; Cheese ; Child* ; Cucurbitaceae ; Education ; Epinephrine ; Food Hypersensitivity* ; Gyeonggi-do ; Humans ; Hypersensitivity ; Juglans ; Nausea ; Prevalence ; Prunus armeniaca ; Pruritus ; Surveys and Questionnaires ; Tea ; Urticaria ; Vitis ; Vomiting

BACKGROUND/AIMS: The role of dietary factors in the pathogenesis of irritable bowel syndrome (IBS) is still unclear. The aim of this study was to compare IgG4 levels to common food antigens between patients with IBS and healthy controls. METHODS: Thirty-two patients diagnosed as IBS according to the Rome III criteria (12 diarrhea subgroup; 20 non-diarrhea subgroup) and 32 sex and age-matched healthy controls participated in the study. Serum IgG4 titers to 90 common foods were measured in each subject. The number of subjects with positivity defined as the cut-off value ≥ 0.7 U/mL was compared. RESULTS: Patients with IBS had significantly higher IgG4 titers to wheat, leek and taro compared to those of controls. Serum IgG4 titers to ginger, cocoa, walnut, white radish, onion, and lettuce in IBS patients tended to be higher than controls. IgG4 titers to wheat, gluten and gliadin in the diarrhea subgroup, and lettuce, leek and taro in the non-diarrhea subgroup tended to be higher compared with controls. The number of subjects with positivity to apple, orange, lettuce, and leek was significantly higher in IBS patients than controls. The number of subjects with positivity to apple, orange, gluten, and gliadin in the diarrhea subgroup, and egg white, pineapple, soybean, lettuce, and leek in the non-diarrhea subgroup was significantly higher compared with controls. CONCLUSIONS: Serum IgG4 antibody levels to some common foods are abnormally elevated in IBS patients. The type of foods with abnormally elevated serum IgG4 titers in the diarrhea subgroup may be different from that in the non-diarrhea subgroup.
Ananas ; Cacao ; Citrus sinensis ; Colocasia ; Diarrhea ; Egg White ; Ginger ; Gliadin ; Glutens ; Humans ; Immunoglobulin G* ; Irritable Bowel Syndrome* ; Juglans ; Lettuce ; Onions ; Raphanus ; Soybeans ; Triticum

Pineapple (Ananas comosus) leaves contain mainly phenolic components with antioxidant and hypolipidemic effects. One of the principle components is p-coumaric acid. In this study, the transport behavior of p-coumaric acid, was observed after the administration of pineapple leaf phenols in vitro. Simultaneously, the effect of the phenols on glucose, total cholesterol and triglycerides transportation and metabolism in HepG2 cells was also observed. The results showed that the phenols had good transport characteristics. 5 min after the administration, p-coumaric acid of the phenols could be detected, and the content of p-coumaric acid reached the peak concentration after 60 min of the administration. p-coumaric acid of phenols have time-and dose-dependent manner. While promoting glucose transporter (GLUT4) and low density lipoprotein receptor (LDLR) expression, the phenols decreased intracellular lipid content. This reduction of intracellular lipid content was highly correlated with the promotion of lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL) expression, while the reduction of intracellular glucose levels was correlated with glycogen synthesis in the cells.
Ananas ; chemistry ; Biological Transport ; drug effects ; Cholesterol ; metabolism ; Glucose ; metabolism ; Hep G2 Cells ; Humans ; Lipid Metabolism ; drug effects ; Plant Extracts ; pharmacology ; Plant Leaves ; chemistry

OBJECTIVETo study the phenolic constituents of the leaves of pineapple.

METHODChromatographic methods were used to isolate compounds from the leaves of pineapple and spectroscopic methods were used to identify the structures of the isolated compounds.

RESULT7 compounds, ananasate (1), 1-O-caffeoylglycerol (2), 1-O-p-coumaroylglycerol (3), caffeic acid (4), p-coumaric acid (5), beta-sitosterol (6) and daucosterol (7), were isolated from the leaves of pineapple.

CONCLUSION1 was a new compound, and others were obtained from this plant for the first time.

Ananas ; chemistry ; Caffeic Acids ; chemistry ; isolation & purification ; Coumaric Acids ; chemistry ; isolation & purification ; Molecular Conformation ; Molecular Structure ; Plant Leaves ; chemistry ; Plants, Medicinal ; chemistry ; Propionates

As Korea is moving toward multicultural society, the number of Muslim, whose religion has a great influence on diet-related behaviors, is increasing in Korea. Since the number of immigrants from Indonesia ranks within top ten in Korea and Indonesia is one of the most representative Islamic countries in Asia, understanding the diet-related behaviors and food preferences of Indonesians is needed. This study was conducted to investigate diet-related behaviors, factors affecting the diet-related perceptions, and food preferences of the Indonesians. The subjects included 500 Indonesians dwelling in Jakarta, Indonesia. About ninety % of the subjects in this study were Muslims. They did not eat pork and dog meat for religious reason and they practiced fasting during Ramadan period. Indonesians avoided pineapple, durian, and hot foods during pregnancy and usually ate vegetables and fruits after birth, which seemed to be due to sociocultural influence. Among the subjects, 21.5% were obese and major health problems reported were hypertension and hyperlipidemia. Their preference for fried food items might have contributed to health problems. Subjects had meals mostly at home (2.3 times/day) and dined out occasionally (1.2 times/ week) at Indonesian restaurants (56.6%) or family restaurants (21.0%). In conclusion, Indonesians had home-based and native food-oriented dietary life with strong religious and sociocultural influence on food choices. Further research on specific nutrient intake analysis is needed to better understand and to improve dietary life of Indonesians in Korea.
Ananas ; Animals ; Asia ; Bombacaceae ; Dogs ; Emigrants and Immigrants ; Fasting ; Food Preferences* ; Fruit ; Humans ; Hyperlipidemias ; Hypertension ; Indonesia ; Islam ; Korea ; Meals ; Meat ; Parturition ; Pregnancy ; Restaurants ; Vegetables

OBJECTIVETo establish a HPLC method for a new compound 1,3-O-dicaffeoylglycerides determination.

METHODThe separation was performed in a Kromasil C18 column (4.6 mm x 150 mm, 5 microm) with a mobile phase of 0.1% H3PO4: Acetontrile = 75 : 25 (v/v). The flow rate was 1.0 ml x min(-)1 and the temperature of column was 30 degrees C.

RESULTA satisfactory separation between 1, 3-O-dicaffeoylglycerides and impurity was obtained. The calibration curve was linear over the concentration range from 0.051 6 microg to 0.516 microg, r = 0.999 9. The average recoveries was 97.1% (RSD 1.3%). The content of 1,3-O-dicaffeoylglycerides in pineapple leaves from three different batches were 0.033%, 0.034% and 0.031% respectively.

CONCLUSIONThe method has good selectivity, high recovery and reproducibility, and can be used for the analysis of 1,3-O-dicaffeoylglycerides in pineapple leaves and their quality control.

Ananas ; chemistry ; Caffeic Acids ; analysis ; chemistry ; isolation & purification ; Chromatography, High Pressure Liquid ; methods ; Diglycerides ; analysis ; chemistry ; isolation & purification ; Molecular Structure ; Plant Leaves ; chemistry ; Reproducibility of Results

PURPOSE: Pollen-food allergy syndrome (PFAS) is an immunoglobulin E (IgE)-mediated allergy in pollinosis patients caused by raw fruits and vegetables and is the most common food allergy in adults. However, there has been no nationwide study on PFAS in Korea. In this study, we investigated the prevalence and clinical characteristics of PFAS in Korea. METHODS: Twenty-two investigators participated in this study, in which patients with allergic rhinoconjunctivitis and/or bronchial asthma with pollen allergy were enrolled. The questionnaires included demographic characteristics, a list of fruits and vegetables, and clinical manifestations of food allergy. Pollen allergy was diagnosed by skin prick test and/or measurement of the serum level of specific IgE. RESULTS: A total of 648 pollinosis patients were enrolled. The prevalence of PFAS was 41.7% (n = 270). PFAS patients exhibited cutaneous (43.0%), respiratory (20.0%), cardiovascular (3.7%) or neurologic symptoms (4.8%) in addition to oropharyngeal symptoms. Anaphylaxis was noted in 8.9% of the PFAS patients. Seventy types of foods were linked to PFAS; e.g., peach (48.5%), apple (46.7%), kiwi (30.4%), peanut (17.4%), plum (16.3%), chestnut (14.8%), pineapple (13.7%), walnut (14.1%), Korean melon (12.6%), tomato (11.9%), melon (11.5%) and apricot (10.7%). Korean foods such as taro/taro stem (8.9%), ginseong (8.2%), perilla leaf (4.4%), bellflower root (4.4%), crown daisy (3.0%), deodeok (3.3%), kudzu root (3.0%) and lotus root (2.6%) were also linked to PFAS. CONCLUSIONS: This was the first nationwide study of PFAS in Korea. The prevalence of PFAS was 41.7%, and 8.9% of the PFAS patients had anaphylaxis. These results will provide clinically useful information to physicians.
Adult ; Ananas ; Anaphylaxis ; Arachis ; Asthma ; Codonopsis ; Crowns ; Cucurbitaceae ; Food Hypersensitivity ; Fruit ; Humans ; Hypersensitivity* ; Immunoglobulin E ; Immunoglobulins ; Juglans ; Korea ; Lotus ; Lycopersicon esculentum ; Neurologic Manifestations ; Perilla ; Pollen ; Prevalence ; Prunus armeniaca ; Prunus domestica ; Prunus persica ; Pueraria ; Research Personnel ; Rhinitis, Allergic, Seasonal* ; Skin ; Vegetables