Abstract
Proinflammatory cytokines (PIC) are crucial regulators of the immune function and mediate the acute phase response
(APR). Information available on the pattern of changes of PIC production in transition period of dairy cows are
fragmentary as well as their consequences on metabolism and health conditions. To verify the potential relevance of
the PIC level with health status of periparturient dairy cows, the changes of the plasma IL-1β and IL-6 have been investigated in 21 Holstein-Friesian cows from 4 weeks before to 4 weeks after parturition. Besides PIC concentrations
and health status, cows were monitored for dry matter intake (DMI), milk yield, body condition score and a wide
metabolic profile. The overall PIC production was higher during dry period compared the first month of lactation, but
showed a high variability among the cows. Thus cows were retrospectively divided in 3 groups according to the
concentrations of IL-1β before parturition and designated as up (UPIL), intermediate (INIL) and low (LOIL) IL-1β group.
The concentrations of IL-1β were 43.4 pg/ml, 78.7 pg/ml and 205.8 pg/ml for LOIL, INIL and UPIL, respectively (P
<0.01). The level of IL-6 is well related to the grouping based on IL-1β (P<0.01) and showed a similar pattern of
changes in transition period. UPIL group had worse health status, lower DMI, more body reserves lost, less milk
production and lower plasma albumin compared to INIL and LOIL. The UPIL cows also showed a more severe APR after
calving, as suggested by the marked increase of haptoglobin and the decrease of Zn (index of metallothionein) and
albumin during the first week of lactation (P< 0.05). Our results demonstrate a high variability of the levels of PIC in
late pregnant cows and the good relation among the high levels of PIC with health troubles (clinical and subclinical)
after calving. Thus, PIC levels could be used as prognostic markers for a risky transition period.
Lingua originale | English |
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Titolo della pubblicazione ospite | 10th International Veterinary Immunology Symposium - IVIS 2013 |
Pagine | 167-168 |
Numero di pagine | 2 |
Stato di pubblicazione | Pubblicato - 2013 |
Evento | 10th International Veterinary Immunology Symposium - IVIS 2013 - Milano Durata: 28 ago 2013 → 1 set 2013 |
Convegno
Convegno | 10th International Veterinary Immunology Symposium - IVIS 2013 |
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Città | Milano |
Periodo | 28/8/13 → 1/9/13 |
Keywords
- Proinflammatory
- health status