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| 1 | Mammary gland growth and vascularity at parturition and during lactation in primiparous ewes fed differing levels of selenium and nutritional plane during gestation显示文摘Background: Objectives were to examine the effects of selenium(Se) supply and maternal nutritional plane during gestation on mammary gland growth, cellular proliferation, and vascularity at parturition and d 20 of lactation. Rambouillet primiparous ewes(n = 84) were allocated to treatments in a 2 x 3 factorial. Factors were dietary Se(adequate Se [ASe, 11.5 μg/kg BW] or high Se [HSe, 77.0 μg/kg BW]) and nutritional plane(60% [RES], 100% [CON], or 140% [EXC]). At parturition, lambs were removed and 42 ewes(7/treatment) were necropsied. Remaining ewes were fed a common diet meeting requirements for lactation and mechanically milked twice daily until necropsy on d 20. At both necropsy periods, mammary glands were dissected and tissues harvested. Samples were analyzed for RNA, DNA, and protein content, cell proliferation, and vascularity. Where interactions were present(P ≤ 0.05), least squares means from the highest-order interaction are presented. Results: Final body weight of ewes was least(P ≤ 0.002) in RES, intermediate for CON, and greatest for EXC, regardless of stage of the ewe at necropsy(parturition or d 20 of lactation). In ewes necropsied at parturition, mammary glands were heavier(P = 0.02) in EXC compared to RES, with CON intermediate. Concentration of RNA(mg/g) was decreased(P = 0.01) in EXC compared to CON at parturition. There was a tendency(P = 0.07) for a Se by nutrition interaction in percentage of cells proliferating where ASe-EXC ewes had greater(P ≤ 0.02) number of proliferating cells then all other treatments. Mammary vascular area tended(P = 0.08) to be affected by a Se by nutrition interaction where ASe-CON had less(P = 0.007) vascular area than HSe-CON ewes. In ewes necropsied at d 20 of lactation, the number of alveoli per area was decreased(P ≤ 0.05) in RES compared to CON and EXC-fed ewes. Conclusions: Results of this study indicate that proper maternal nutritional plane during gestation is important for mammary gland development, even out to d 20 of lactation. | Tammi L Neville Allison M Meyer Arshi Reyaz Pawel B Borowicz Dale A Redmer Lawrence P Reynolds Joel S Caton Kimberly A Vonnahme | 2013 | Journal of Animal Science and Biotechnology2013，4，4： | 3 |
| 2 | Radiometric correction of visible and infrared remote sensing data at the Canada Centre for Remote Sensing显示文摘 | AHERN F J Brown R J Cihlar J Gauthier R Murphy J Neville R A and Teillet P M | 1984 | International Journal of Remote Sensing1984，8，： | 2 |
| 3 | Transformation range viscosity measurements using a Thermomehcnieal analyzer 显示文摘 | Neville M Sarofim A F | 1985 | Fuel1985，64，： | 1 |
| 4 | Non-Elastic Deformation of Concrete under Cyclic Compression 显示文摘 | Waley C P Neville A M | 1973 | Magazine of Concrete Research1973，25，84： | 1 |
| 5 | Adjusting ath- letes~body mass index to better reflect adiposity in epidemio- logical research显示文摘 | NEVILL A M WINTER E M WATTS A S | 2010 | J Sports Sci2010，28，： | 1 |
| 6 | Effects of plane of nutrition and selenium supply during gestation on ewe and neonatal offspring performance,body composition,and serum selenium显示文摘 | Meyer A M Reed J J Neville T L | 2010 | J Anita Sci2010，88，5： | 1 |
| 7 | Laser-induced local heating of multilayers显示文摘 | Masud M Neville G A Goodman J W | 1982 | Appl Opt1982，21，6： | 1 |
| 8 | A comparison of creep, elasticity and strength of concrete in tension and in compression 显示文摘 | BROOKS J J NEVILLE A M | 1977 | Maga- zinc of Concrete Research1977，29，100： | 1 |
| 9 | Mechanisms of wear on a Co-base alloy in liquid-solid slurries显示文摘 | Neville A Reyes M Hodgkiess T | 2000 | Wear2000，238，： | 1 |
| 10 | Laser-induced local heating of multilayers显示文摘 | Mansuripur M Neville C G A Goodman J W | 1982 | Appl Opt1982，21，6： | 1 |
| 11 | Degradation mechanisms of CO2 based alloy and WC metal matrix composites for drilling tools off shore显示文摘 | M Reyes A Neville | 2003 | Wear2003，255，： | 1 |
| 12 | Mechanisms of wear on a Co-base alloy in liquid-solid slurries显示文摘 | Neville A Reyes M Hodgkiess T | 2000 | Wear2000，238，2： | 1 |
| 13 | Non-elastic deformation of concrete under cyclic compression显示文摘 | WHALEY C P NEVILLE A M | 1973 | Magazine of Concrete Research1973，25，： | 1 |
| 14 | Identifying Home Advantage in International Tennis and Golf Tournaments显示文摘 | NEVILL A M HOLDER R L BARDSLEY A | 1997 | J Sports Sci1997，15，： | 1 |
| 15 | Twenty-five years of sport performance research in the journal of sports sciences 显示文摘 | NEVILL A ATKINSON G HUGHES M | 2008 | J Sports Sci2008，26，4： | 1 |
| 16 | ZDDP and MoDTC interactions in boundary lubrication-The effect of temperature and ZDDP MoDTC ratio显示文摘 | Morina A Neville A Priest M | 2006 | Tribolo- gy International2006，39，： | 1 |
| 17 | Effects of plane of nutrition and selenium supply during gestation on ewe and neonatal offspring performance, body composition, and serum selenium显示文摘 | Meyer A M Reed J J Neville T L Taylor J B Hammer C J Reynolds L P Redmer D A Vonnahme K A Caton J S | 2010 | Journal of Animal Science2010，88，5： | 1 |
| 18 | Degradation mechanisms of Co-based alloy and WC metal-matrix composites for drilling tools offshore显示文摘 | Reyes M Neville A | 2003 | Wear2003，255，： | 1 |
| 19 | The effects of 24 weeks of moderate-or high intensity exercise on insulin resistance显示文摘 | GARY O D KEARNEY E M NEVIL A M | 2005 | Eur J Appl Physiol2005，95，： | 1 |
| 20 | Effects of selenium supply and dietary restriction on maternal and fetal body weight, visceral organ mass and cellularity estimates, and jejunal vascularity in pregnant ewe lambs显示文摘 | Reed J J Ward M A Vonnahme K A Neville T L Julius S L Borowicz P P Taylor J B Redmer D A Grazul-Bilska A T Reynolds L P Caton J S | 2007 | Journal of Animal Science2007，85，10： | 1 |
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