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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Hongrong McKain, Nest Walker, Nicola D. Wallace, R. John |
| Copyright Year | 2004 |
| Abstract | The aim was to investigate known and potential new inhibitiors of dipeptidyl peptidases (DPP) for their effects on ruminal microorganisms. Gly-Phe diazomethylketone (GPD), Ala-Ala chloromethylketone (AAC), benserazide (DL-serine 2-(2,3,4- trihydroxybenzyl) hydrazide), and diprotin A (Ile-Pro-Ile) inhibited DPP activities of Prevotella albensis, P. ruminicola, P. bryantii, P. brevis, and mixed ruminal microorganisms, though incompletely and, except for diprotin A, without absolute specificity for any of the peptidases. Leucine aminopeptidase activity of Streptococcus bovis was also inhibited by GPD and benserazide. The inhibitors had no effect on the growth of the bacteria, except for GPD, which inhibited growth of P. albensis when only peptides were available for growth. Benserazide had some inhibitory effects on the growth of Megasphaera elsdenii and Prevotella spp., even in the absence of peptides. The predatory activity of ciliate protozoa on bacteria was unaffected by DPP inhibitors. Ammonia production from casein by mixed ruminal microorganisms was inhibited significantly (P < 0.05) by AAC (29% inhibition) and benserazide (33%). It was concluded that DPP inhibitors can influence the rate of NH3 production in the rumen and may form the basis for developing protein-sparing feed additives for ruminants. |
| Starting Page | 115 |
| Ending Page | 122 |
| Page Count | 8 |
| File Format | |
| ISSN | 03438651 |
| Journal | Current Microbiology |
| Volume Number | 49 |
| Issue Number | 2 |
| e-ISSN | 14320991 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2004-01-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Microbiology Applied Microbiology and Biotechnology |
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