In vitro biodegradation of cyanotoxins in the rumen fluid of cattle

BMC Veterinary Research

Kjell Malmlöf¹  Paresh C Dutta²  Samanthi RP Madawala²  Manjunath Manubolu¹ 

[1] Department of Anatomy, Physiology and Biochemistry, Faculty of Veterinary Medicine and Animal Science, SLU, Box 7011 750 07 Uppsala, Sweden;Department of Food Science, Swedish University of Agricultural Sciences, SLU 750 07 Uppsala, Sweden

关键词: Rumen microbial flora;    Nodularin;    Microcystins;    Biodegradation;   

Others  :  1119184
DOI  :  10.1186/1746-6148-10-110

 received in 2013-05-22, accepted in 2014-05-01,  发布年份 2014

【 摘 要 】

Background

In countries around the Baltic Sea grazing ruminants have access to and drink, surface water from lakes, rivers and in several coastal regions. The water quality of these naturally occurring reservoirs affects performance and health of livestock. In the Baltic Sea both microcystin (MC) and nodularin (NOD) occurs as cyclic peptides and have hepatotoxic effects. Although cattle obviously have died after consuming contaminated water very little information is available as to how susceptible ruminants are to the toxins produced by cyanobacteria. The critical question as to whether the rumen microflora might constitute a protective shield is unresolved. For this reason our aim is to investigate a possible degradation rate of these toxins in rumen.

Results

The ability of rumen microorganisms to degrade certain important cyanotoxins (MC-LR, YR, RR and NOD) was studied in vitro by incubating with rumen fluid at three different concentrations (0.05, 0.5 and 5 μg/mL) for 3 h. The degradation efficiencies were determined by LC-MS (ESI) positive mode. Degradation was observed in the following order MC-RR 36%, NOD 35%, MC-RR 25% and MC-LR 8.9% at lower concentrations within 3 h. However, average degradation was observed at concentration of 0.5 μg/mL. No degradation was observed in higher concentrations for entire 3 h. The present results reveal that the degradation was both dose and time dependent.

Conclusions

In conclusion the present results suggest that the rumen microbial flora may protect ruminants from being intoxicated by Cyanotoxins.

【 授权许可】

   
2014 Manubolu et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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