Improvement of intestinal microflora balance and prevention of digestive and respiratory organ diseases in calves by green tea extracts

Ishihara, Noriyuki; Chu, Djong-Chi; Akachi, Shigehiro; Juneja, Lekh Raj

doi:10.1016/s0301-6226(00)00233-5

Cited by 119 publications

(81 citation statements)

References 37 publications

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“…31 In an in vitro study conducted by Kemperman et al, 32 the antimicrobial effect of a black tea extract was analyzed by traditional culturing and qPCR, and its impact on microbial community was also assessed by PCR-DGGE and 16S rDNA measurements. 32 Several animal studies conducted in pigs 33 and in calves 34 concluded that tea polyphenols produced an enhancement in animals' intestinal microbiota. Thus, pigs that received 0.2% of tea polyphenols for 2 weeks showed a significant decrease in total bacteria and bacteroidaceae and a tendency to decrease in C. perfringens.…”

Section: Hydrolysable Tannins (Ellagitannins)mentioning

confidence: 99%

Impact of Polyphenols and Polyphenol-Rich Dietary Sources on Gut Microbiota Composition

Etxeberría

Fernández‐Quintela

Milagro³

et al. 2013

J. Agric. Food Chem.

329

232

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Gut microbiota plays a key role in host physiology and metabolism. Indeed, the relevance of a well-balanced gut microbiota composition to an individual´s health status is essential for the person's well-being. Currently, investigations are focused on analyzing the effects of pre-and probiotics as new therapeutic tools to counteract the disruption of intestinal bacterial balance occurring in several diseases. Polyphenols exert a wide range of beneficial health effects. However, although specific attention has been paid in recent years to the function of this "biological entity" in the metabolism of polyphenols, less is known about the modulatory capacity of these bioactive compounds on gut microbiota composition. This review provides an overview of the latest investigations carried out with pure polyphenols, extracts rich in polyphenols and polyphenol-rich dietary sources (such as cocoa, tea, wine, soy products and fruits), and critically discusses the consequences to gut microbiota composition which are produced.

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Section: Hydrolysable Tannins (Ellagitannins)mentioning

confidence: 99%

Impact of Polyphenols and Polyphenol-Rich Dietary Sources on Gut Microbiota Composition

Etxeberría

Fernández‐Quintela

Milagro³

et al. 2013

J. Agric. Food Chem.

329

232

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“…Plant polyphenols (PP) have also exhibited antimicrobial activity against bacteria that cause food-borne diseases (Taguri et al, 2004;Percival et al, 2006;Kim et al, 2009). Previous reports have shown that polyphenols from olive leaves exert great antimicrobial activity (Sudjana et al, 2009), tea polyphenols improve the balance of gut microflora in calves (Ishihara et al, 2001) and inhibit the proliferation of Chlamydia (Yamazaki et al, 2003), apple polyphenol extracts prevent damage to human gastric epithelial cells (Graziani et al, 2005), and polyphenols from grape seeds could prevent oxidative damage to cellular DNA in vitro (Fan and Lou, 2004). Thus, antioxidant and antimicrobial activity, as well as gut modulating effects of PP, have been suggested (Windisch et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Modulation of Plasma Antioxidant Activity in Weaned Piglets by Plant Polyphenols

Zhang

Jiang

Mantovani

et al. 2014

Italian Journal of Animal Science

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This study was conducted to evaluate the effect of plant polyphenols (PP) on antioxidant activity in weaned piglets. First, a uniform design, one optimising an experimental technique that can rationally arrange the concentrations of mixture components, was used to obtain the best PP mixture of apple, grape seed, green tea and olive leaf polyphenols based on in vitro antioxidant capacity and inhibitory action on bacterial growth. Second, the optimised PP mixture was tested in vivo with an efficacy trial on piglets. The optimal effects of the mix were observed in vitro when apple, grape seed, green tea, olive leaf polyphenols and a carrier (silicon dioxide) accounted for 16.5, 27.5, 30, 2.5 and 23.5%, respectively, of the mixture. Forty-eight weaned piglets were randomly allocated to two dietary treatments (6 replicates of 4 piglets each per treatment) and fed a control diet (CTR) or CTR supplemented with 0.1% of the optimised PP mixture. Dietary PP did not affect growth performance compared to the CTR group. Plasma total protein, urea nitrogen and lysozyme content were not affected by dietary treatment. No differences of E. coli or Clostridia counts in the faeces and caecum content between the CTR and PP groups were observed. A reduced malondialdehyde concentration in the PP group was observed on day 21 compared to the CTR group (P=0.02). In conclusion, the prepared PP mixture has the potential to improve plasma antioxidant activity.

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“…The hydrolysable tannins, however, are used in ruminant nutrition to protect the dietary N in the rumen, the so called by-pass effect (Douglas et al, 1995). Moreover, some reports indicate a reduced incidence of diarrhoea and mortality in farm animals as consequence of the dietary use of tannins from various plant extracts (Zimmerman and Bessei, 2001;Ishihara et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Technical note: Preliminary results with a tannin extract on the performance and mortality of growing rabbits in an enteropathy infected environment.

Maertens

Štruklec²

2010

World rabbit sci.

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ABSTRACT:In 3 preliminary trials, the effect of a dietary addition with 0.5% of a chestnut tannin extract, containing approximately 55% hydrolysable tannins, was examined on mortality after weaning. The tannin-enriched diet was fed to the does and their litters from 22 days of lactation. After weaning (day 29), young rabbits did not change dietary treatment and remained on the control diet or the tannin-enriched diet, respectively. In total 1217 rabbits were considered, about half of whom were fed the tannin-enriched diet. Mortality reached 17.1% and 7.7% (trial 1, P=0.054), 17.2 and 18.2% (trail 2, NS) and 29.0% and 9.9% (trial 3, P<0.001) in controls and tannin-fed rabbits, respectively. The autopsy on 6 control rabbits revealed typical symptoms of rabbit epizootic enteropathy with a predominance of Clostridium spiroforme. Weight gain was determined only in trial 3 and was significantly higher in tannin-fed rabbits (average weight at 57 d of age: 1893 and 2005 g, respectively; P<0.01). Some hypotheses are formulated to explain these preliminary results, but they still have to be verified.

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Improvement of intestinal microflora balance and prevention of digestive and respiratory organ diseases in calves by green tea extracts

Cited by 119 publications

References 37 publications

Impact of Polyphenols and Polyphenol-Rich Dietary Sources on Gut Microbiota Composition

Impact of Polyphenols and Polyphenol-Rich Dietary Sources on Gut Microbiota Composition

Modulation of Plasma Antioxidant Activity in Weaned Piglets by Plant Polyphenols

Technical note: Preliminary results with a tannin extract on the performance and mortality of growing rabbits in an enteropathy infected environment.

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