「一日一蘋果,醫生遠離我」是常見的西方諺語,一項最新研究再次證實了這句話的道理。動物實驗顯示,多吃蘋果可以明顯增加腸道內有益細菌的數量,有助於保持健康。
新一期英國《BMC微生物學雜誌》刊登丹麥大學研究人員的報告說,如果給實驗鼠長期吃蘋果,則可以檢測到其腸道內一些有益細菌的數量增加。這些細菌有利於腸道維持理想的酸鹼環境,而且它們還可以分泌一種可被腸道細胞當作能量來源的化學物質。
研究人員說,這是因為蘋果中含有的蘋果膠質可以幫助有益細菌在實驗鼠腸道內生長,而這些細菌帶來的好處甚至可能包括減少患癌症的風險。
研究人員指出,雖然人類腸道系統對蘋果膠質是否存在同樣的反應還有待進一步研究證實,但這項研究結果可以說明,人們對蘋果的偏愛是有道理的。(生物谷Bioon.com)
腸道菌群研究:
Science:腸道微生物與宿主共同進化
Structure:腸道菌用結構識別控制澱粉分解
ISME Journal:基因與飲食和肥胖的關係
Nature:腸道細菌可保護宿主腸道免受病原體侵害
PLoS biology:人類腸道細菌超1000萬億
PNAS:腸道細菌控制你的體重
Nature:友好細菌影響腸道響應
生物谷推薦原始出處:
Effects of apples and specific apple components on the cecal environment of conventional rats: role of apple pectin
Tine R. Licht1 Max Hansen2, Anders Bergstr1, Morten Poulsen2, Britta N. Krath2,3,
Jaroslaw Markowski4, Lars O. Dragsted3, and Andrea Wilcks1
1Department of Microbiology and Risk Assessment, National Food Institute, Technical University of Denmark, Mkh Bygade 19, DK-2860 Sorg, Denmark
2Department of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Mkh Bygade 19, DK-2860 Sorg, Denmark
3Department of Human Nutrition, Faculty of Life Sciences, University of Copenhagen,Rolighedsvej 30, DK-1958 Frederiksberg C, Denmark
4Department of Storage and Processing, Research Institute of Pomology and Floriculture, 96-100 Skierniewice, Poland
Background
Our study was part of the large European project ISAFRUIT aiming to reveal the biological explanations for the epidemiologically well-established health effects of fruits. The objective was to identify effects of apple and apple product consumption on the composition of the cecal microbial community in rats, as well as on a number of cecal parameters, which may be influenced by a changed microbiota.
Results
Principal Component Analysis (PCA) of cecal microbiota profiles obtained by PCR-DGGE targeting bacterial 16S rRNA genes showed an effect of whole apples in a long-term feeding study (14 weeks), while no effects of apple juice, purée or pomace on microbial composition in cecum were observed. Administration of either 0.33 or 3.3% apple pectin in the diet resulted in considerable changes in the DGGE profiles.