| Photoperiod influences the immune status of multiparous pregnant sows and their piglets. | |
| | |
MedLine Citation:
|
PMID: 16864867 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Manipulation of photoperiod may provide a noninvasive, easily implemented, effective method to improve immune status and enhance the efficiency of production. The objective of this study was to evaluate the impact of manipulation of photoperiod on endocrine and immune responses of pregnant sows and their offspring. At d 83 of gestation, sows were moved to gestation stalls and kept on a photoperiod of 12 h of light:12 h of dark until d 90, when sows were assigned to a long day (LD; 16 h of light/d) or a short day (SD; 8 h of light/d) treatment. During farrowing and lactation, one-half of the sows remained on their initial photoperiod (LD:LD or SD:SD), whereas one-half were switched to the opposite treatment (LD:SD or SD:LD). Blood samples were collected from sows at d 0, 7, 14, and 21 posttreatment, 24-h postfarrowing, and the end of lactation (approximately d 21 postfarrowing). Piglets were bled at 7 and 21 d of age for immune measures. Relative to sows on LD, sows on SD had greater concanavalin A- (P = 0.003) and lipopolysaccharide- (P = 0.02) induced proliferative responses at d 7 but reduced responses at d 14. Compared with SD, sows on LD had a greater (P < 0.05) percentage of neutrophils and fewer (P < 0.05) lymphocytes at d 7, resulting in a greater (P = 0.05) neutrophil:lymphocyte ratio. Neutrophil phagocytosis was greater at d 21 in sows kept on LD. Cortisol concentrations tended to be greatest (P = 0.10) in sows on SD:SD at 24-h postfarrowing and throughout lactation. At 7 d of age, piglets on LD:SD had greater (P = 0.001) total white blood cells (WBC) and plasma cortisol (P = 0.001) relative to those on the other photoperiod treatments. Plasma immunoglobulin G was less (P = 0.001) in piglets from sows kept on SD:LD compared with the other photoperiod treatments. Piglets from sows kept on LD:LD tended to have lower total WBC (P = 0.08) at 21 d of age. Piglets from sows kept on SD:SD had greater concanavalin A- (P < 0.001) and lipopolysaccharide-induced (P < or = 0.10) proliferation responses and cortisol (P = 0.05). Phagocytosis was greater (P < 0.003) in piglets from sows that were kept on LD:LD. Cortisol (P = 0.02), WBC (P = 0.003), and immunoglobulin G (P = 0.001) were all influenced by gestational photoperiod treatment. These data indicate that photoperiod influences the immune status and endocrine response of piglets from dams that have been kept on a defined photoperiod. We conclude that photoperiod effects on piglets may be programmed in utero and can last throughout lactation. |
| | |
Authors:
|
S R Niekamp; M A Sutherland; G E Dahl; J L Salak-Johnson |
Related Documents
:
|
376227 - The burn patient: ii. later care and complications of thermal injury. 3956077 - Composite tissue transfer in burn patients. 16177587 - Improving wound care outcomes in the home setting. 11933337 - Developing a new wound care formulary and guidelines. 1105847 - Problems of eye care delivery. 22689437 - Caregivers burden of older adults with chronic illnesses in the community: a cross-sect... |
Publication Detail:
|
Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Journal of animal science Volume: 84 ISSN: 1525-3163 ISO Abbreviation: J. Anim. Sci. Publication Date: 2006 Aug |
Date Detail:
|
Created Date: 2006-07-25 Completed Date: 2006-10-19 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: United States |
Other Details:
|
Languages: eng Pagination: 2072-82 Citation Subset: IM |
Affiliation:
|
Department of Animal Sciences, University of Illinois, Urbana 61801, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Body Weight Female Immunity / radiation effects* Lactation Light Litter Size Male Parity* Photoperiod* Pregnancy Swine / immunology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Epigenetic characteristics of cloned and in vitro-fertilized swamp buffalo (Bubalus bubalis) embryos...
Next Document: Changes in ovine maternal temperature, and serum cortisol and interleukin-6 concentrations after cha...