2015Unpublished venueRequires access

Investigation of Butyrate-producing Bacteria and Genes from Fecal Samples of Thai Volunteers

Siam Popluechai, Niwed Kullawong, Auttapon Taluengjit, Patcharee Pripdeevech, Art Hiranyakas, Kongkiat Kespechara

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Abstract

Butyrate, produced by intestinal anaerobic bacteria via dietary carbohydrate fermentation, is an important energy source for gut epithelial cells. The butyrate also plays a crucial role in homeostasis of intestinal epithelial cells including cellular proliferation, differentiation, and apoptosis. Butyrate production depends on the type of diet and availability of butyrate-producing bacteria. Bacteria of Clostridial cluster IV (CIV) and cluster XIVa (CXIVa) are major butyrate producers. This study investigated: i) the availability of Faecalibacterium prausnitzii (a representative of CIV) and Clostridium coccoides – Eubacterium rectale group (a representative of CXIVa), and ii) the presence of the butyrate-producing genes, butyryl-CoA: acetate CoA-transferase ( but ) and butyrate kinase ( buk ), in fecal samples of butyrate-producing volunteers using quantitative PCR. The samples were obtained from six normal (BMI23) and eight overweight (BMI23) Thai volunteers. The results showed the trend toward higher levels of Faecalibacterium prausnitzii found in the overweight volunteers as compared to the normal-weight volunteers. However, the proportion of Clostridium coccoides – Eubacterium rectale was not different between the two groups. Interestingly, the availability of Faecalibacterium prausnitzii showed significant positive correlation to the presence of but (r=0.752, p 23) จำนวน 8 คน ผลการศกษาพบวา สดสวนปรมาณแบคทเรย Faecalibacterium prausnitzii ในอจาระของอาสาสมครทมดชนมวลกายเกนปกตมแนวโนมสดสวนแบคทเรยชนดดงกลาวสงกวาในอจจาระของอาสาสมครทมดชนมวลกายปกต อยางไรกตามสดสวนแบคทเรยกลม Clostridium coccoides-Eubacterium rectale ไมแตกตางกนระหวางสองกลม จากการประมวลทางสถตเพอหาความสมพนธระหวางสดสวนของแบคทเรย ยนและคาดชนมวลกาย พบวาสดสวนของแบคทเรย Faecalibacterium prausnitzii มความสมพนธทางบวกอยางมนยสำคญกบสดสวนของยน but (r = 0.752, p <0.05) และคาดชนมวลกายมความสมพนธเชงบวกกบสดสวนของยน buk (r = 0.812, p <0.01)

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Butyrate, produced by intestinal anaerobic bacteria via dietary carbohydrate fermentation, is an important energy source for gut epithelial cells. The butyrate also plays a crucial role in homeostasis of intestinal epithelial cells including cellular proliferation, differentiation, and apoptosis. Butyrate production depends on the type of diet and availability of butyrate-producing bacteria. Bacteria of Clostridial cluster IV (CIV) and cluster XIVa (CXIVa) are major butyrate producers. This study investigated: i) the availability of Faecalibacterium prausnitzii (a representative of CIV) and Clostridium coccoides – Eubacterium rectale group (a representative of CXIVa), and ii) the presence of the butyrate-producing genes, butyryl-CoA: acetate CoA-transferase ( but ) and butyrate kinase ( buk ), in fecal samples of butyrate-producing volunteers using quantitative PCR. The samples were obtained from six normal (BMI23) and eight overweight (BMI23) Thai volunteers. The results showed the trend toward higher levels of Faecalibacterium prausnitzii found in the overweight volunteers as compared to the normal-weight volunteers. However, the proportion of Clostridium coccoides – Eubacterium rectale was not different between the two groups. Interestingly, the availability of Faecalibacterium prausnitzii showed significant positive correlation to the presence of but (r=0.752, p 23) จำนวน 8 คน ผลการศกษาพบวา สดสวนปรมาณแบคทเรย Faecalibacterium prausnitzii ในอจาระของอาสาสมครทมดชนมวลกายเกนปกตมแนวโนมสดสวนแบคทเรยชนดดงกลาวสงกวาในอจจาระของอาสาสมครทมดชนมวลกายปกต อยางไรกตามสดสวนแบคทเรยกลม Clostridium coccoides-Eubacterium rectale ไมแตกตางกนระหวางสองกลม จากการประมวลทางสถตเพอหาความสมพนธระหวางสดสวนของแบคทเรย ยนและคาดชนมวลกาย พบวาสดสวนของแบคทเรย Faecalibacterium prausnitzii มความสมพนธทางบวกอยางมนยสำคญกบสดสวนของยน but (r = 0.752, p <0.05) และคาดชนมวลกายมความสมพนธเชงบวกกบสดสวนของยน buk (r = 0.812, p <0.01)

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Available abstract

Butyrate, produced by intestinal anaerobic bacteria via dietary carbohydrate fermentation, is an important energy source for gut epithelial cells. The butyrate also plays a crucial role in homeostasis of intestinal epithelial cells including cellular proliferation, differentiation, and apoptosis. Butyrate production depends on the type of diet and availability of butyrate-producing bacteria. Bacteria of Clostridial cluster IV (CIV) and cluster XIVa (CXIVa) are major butyrate producers. This study investigated: i) the availability of Faecalibacterium prausnitzii (a representative of CIV) and Clostridium coccoides – Eubacterium rectale group (a representative of CXIVa), and ii) the presence of the butyrate-producing genes, butyryl-CoA: acetate CoA-transferase ( but ) and butyrate kinase ( buk ), in fecal samples of butyrate-producing volunteers using quantitative PCR. The samples were obtained from six normal (BMI23) and eight overweight (BMI23) Thai volunteers. The results showed the trend toward higher levels of Faecalibacterium prausnitzii found in the overweight volunteers as compared to the normal-weight volunteers. However, the proportion of Clostridium coccoides – Eubacterium rectale was not different between the two groups. Interestingly, the availability of Faecalibacterium prausnitzii showed significant positive correlation to the presence of but (r=0.752, p 23) จำนวน 8 คน ผลการศกษาพบวา สดสวนปรมาณแบคทเรย Faecalibacterium prausnitzii ในอจาระของอาสาสมครทมดชนมวลกายเกนปกตมแนวโนมสดสวนแบคทเรยชนดดงกลาวสงกวาในอจจาระของอาสาสมครทมดชนมวลกายปกต อยางไรกตามสดสวนแบคทเรยกลม Clostridium coccoides-Eubacterium rectale ไมแตกตางกนระหวางสองกลม จากการประมวลทางสถตเพอหาความสมพนธระหวางสดสวนของแบคทเรย ยนและคาดชนมวลกาย พบวาสดสวนของแบคทเรย Faecalibacterium prausnitzii มความสมพนธทางบวกอยางมนยสำคญกบสดสวนของยน but (r = 0.752, p <0.05) และคาดชนมวลกายมความสมพนธเชงบวกกบสดสวนของยน buk (r = 0.812, p <0.01)

Key concepts: Faecalibacterium prausnitzii, Eubacterium, Butyrate, Microbiology, Human feces, Biology, Bifidobacterium, Bifidobacterium bifidum

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