Rumen-protected choline (RPC) was evaluated for effects on the lipid and glycogen content of the liver and metabolic variables in the blood plasma of dairy cows. Thirty-two Holstein cows were allocated into two groups (RPC group with RPC supplementation and control group without RPC supplementation) 28 days before the expected calving. Cows were fed the experimental diet from 21 days before calving until day 60 of lactation. The diet of the RPC group was supplemented with 100 g/day of RPC from 21 days prepartum until calving and 200 g/day of RPC for 60 days postpartum, providing 25 and 50 g of choline, respectively. Liver samples were taken by percutaneous needle biopsy, then analysed for total lipid (TLl), triglyceride (TGl) and glycogen (GLYl) contents on days −21, +7, +35 and +60 relative to calving. Blood was collected on the same sampling days and 21 days after calving. Glucose, non-esterified fatty acid (NEFA), β-hydroxybutyrate (BHBA), triglyceride (TGp), total cholesterol (TCh), urea, ammonia and aspartate aminotransferase (AST) were determined from blood samples. The TLl and TGl contents were 25.0 ± 4.3 g and 25.3 ± 3.8 g per kg wet weight (mean ± SEM), respectively, lower in the RPC group than in the control animals. No significant differences were observed in the GLYl concentrations between the two groups. However, a lower TGl: GLYl ratio was shown in the liver of cows fed the RPC diet as compared to the controls. RPC supplementation decreased BHBA while increasing TGp concentrations were shown in the blood of cows fed the RPC diet, possibly as a consequence of improved lipoprotein synthesis in, and triglyceride excretion from, the liver, together with a reduced rate of ketogenesis.
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Hartwell, J. R., Cecava, M. J. and Donkin, S. S. (2000): Impact of dietary rumen undegradable protein and rumen protected choline on intake, periparturient liver triacylglyceride, plasma metabolites and milk production in transition cows. J. Dairy Sci. 83, 2907–2917.
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Hartwell, J. R., Cecava, M. J. and Donkin, S. S. (2001): Rumen undegradable protein, rumenprotected choline and mRNA expression for enzymes in gluconeogenesis and ureagenesis in periparturient dairy cows. J. Dairy Sci. 84, 490–497.
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ACTA VETERINARIA HUNGARICA
Institute for Veterinary Medical Research
Centre for Agricultural Research
Hungarian Academy of Sciences
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| 2020 | |
| Total Cites | 987 |
| WoS | |
| Journal Impact Factor |
0,955 |
| Rank by | Veterinary Sciences 101/146 (Q3) |
| Impact Factor | |
| Impact Factor | 0,920 |
| without | |
| Journal Self Cites | |
| 5 Year | 1,164 |
| Impact Factor | |
| Journal | 0,57 |
| Citation Indicator | |
| Rank by Journal | Veterinary Sciences 93/166 (Q3) |
| Citation Indicator | |
| Citable | 49 |
| Items | |
| Total | 49 |
| Articles | |
| Total | 0 |
| Reviews | |
| Scimago | 33 |
| H-index | |
| Scimago | 0,395 |
| Journal Rank | |
| Scimago | Veterinary (miscellaneous) Q2 |
| Quartile Score | |
| Scopus | 355/217=1,6 |
| Scite Score | |
| Scopus | General Veterinary 73/183 (Q2) |
| Scite Score Rank | |
| Scopus | 0,565 |
| SNIP | |
| Days from | 145 |
| submission | |
| to acceptance | |
| Days from | 150 |
| acceptance | |
| to publication | |
| Acceptance | 19% |
| Rate |
| 2019 | |
|---|---|
| Total Cites WoS |
798 |
| Impact Factor | 0,991 |
| Impact Factor without Journal Self Cites |
0,897 |
| 5 Year Impact Factor |
1,092 |
| Immediacy Index |
0,119 |
| Citable Items |
59 |
| Total Articles |
59 |
| Total Reviews |
0 |
| Cited Half-Life |
9,1 |
| Citing Half-Life |
9,2 |
| Eigenfactor Score |
0,00080 |
| Article Influence Score |
0,253 |
| % Articles in Citable Items |
100,00 |
| Normalized Eigenfactor |
0,09791 |
| Average IF Percentile |
42,606 |
| Scimago H-index |
32 |
| Scimago Journal Rank |
0,372 |
| Scopus Scite Score |
335/213=1,6 |
| Scopus Scite Score Rank |
General Veterinary 62/178 (Q2) |
| Scopus SNIP |
0,634 |
| Acceptance Rate |
18% |
| Acta Veterinaria Hungarica | |
|---|---|
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| Acta Veterinaria Hungarica | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1951 |
| Volumes per Year |
1 |
| Issues per Year |
4 |
| Founder | Magyar Tudományos Akadémia |
| Founder's Address |
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| Publisher | Akadémiai Kiadó |
| Publisher's Address |
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| ISSN | 0236-6290 (Print) |
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