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Nathan Long

Assistant Professor
Animal and Veterinary Sciences Department

Office: 137 P&A Building
Phone: 656-4023
Fax: 656-3131

Email: nlong2@clemson.edu
 

 Educational Background

Ph.D. Reproductive Physiology
Oklahoma State University 2008

M.S. Ruminant Nutrition
University of Georgia 2004

B. S. Animal and Veterinary Sciences
Clemson University 2002

 Courses Taught

AVS 2000/2001 Beef technique
AVS 3900 Practicum
AVS 4010/4011 Beef Production
AVS 4090 Undergraduate Research Experience
AVS 6010/6011 Graduate Beef Production
AVS 8010 Graduate Special Problems

 Research Interests

Area of expertise is in the field of fetal programming which is the study of the effects of maternal and environmental factors that cause alteration in fetal growth and development. I then investigate how the changes to the fetus persist into the postnatal animal and leads to physiological effects like diabetes, high blood pressure, and obesity. To accomplish my research I utilize sheep and cattle as my models. In addition to this research, I am interested in the effects of postnatal nutrition and specific nutrients on growth and marbling of calves.

 Publications

Long, N. M., G. M. Hill, J. F. Baker, W. M. Graves, M. A. Froetschel, D. H. Keisler, and B. G. Mullinix Jr. Reproductive performance of beef heifers supplemented with corn gluten feed and rumen protected fat before breeding. 2007 Professional Animal Scientist. Vol 23 P 316 – 324.
Long, N. M., G. M. Hill, J. F. Baker, W. M. Graves, D. H. Keisler, and B. G. Mullinix Jr. Case study: reproductive performance of beef cows fed whole soybeans before the breeding interval. 2008. Professional Animal Scientist. Vol 24 P 639 - 647.
Long, N. M., K. A. Vonnahme, B. W. Hess, P. W. Nathanielsz, and S. P. Ford. Effects of early gestational undernutrition on fetal growth, organ development, and placentomal composition in the bovine. 2009 J. Anim Sci. 87: 1950-1959.
Long, N. M., M. P. Davis, M. J. Prado-Cooper, I. Rubio, and R. P. Wettemann. Estrus and luteal activity of postpartum beef cows after treatment with estradiol. 2009 Professional Animal Scientist. 25:481-486
Long, N. M., A. B. Uthlaut, D. C. Rule, P. W. Nathanielsz, and S. P. Ford. The Effects of Maternal Obesity and High Nutrient Intake on Ovine Colostrum Nutrient Composition. 2009 Proceedings, Western Section, Amer. Soc. Anim. Sci. Vol. 60:183-186.
Long, N. M., M. J. Nijland, P. W. Nathanielsz, and S. P. Ford. The impacts of early to mid-gestational nutrient restriction on female offspring fertility and hypothalamic-pituitary-adrenal axis response to stress. 2010. J. Anim. Sci. 88: 2029-2037.
George, L. A., A.B. Uthlaut, N. M. Long, L. Zhang, Y. Ma, D. T. Smith, P.W. Nathanielsz, and S.P. Ford. Different levels of overnutrition and weight gain during pregnancy. have differential effects on fetal growth and organ development. 2010. Reprod. Biol. and Endocrinol 8:75.
Long, N. M., M.J. Prado-Cooper, C.R. Krehbiel, U. DeSilva, and R.P. Wettemann. Effects of nutrient restriction of bovine dams during early gestation on postnatal growth, carcass and organ characteristics, and gene expression in adipose tissue and muscle. 2010. J. Anim. Sci. 88: 3251-3261.
Long, N. M., M.J. Prado-Cooper, C.R. Krehbiel, and R.P. Wettemann. Effects of nutrient restriction of bovine dams during early gestation on postnatalgrowth and regulation of plasma glucose. 2010. J. Anim. Sci. 88: 3262-3268.
Long, N. M., L. A. George, A. B. Uthlaut, D. T. Smith, M. J. Nijland , P. W. Nathanielsz, and S. P. Ford. Maternal obesity and high nutrient intake before and during gestation in the ewe results in altered growth, adiposity and glucose tolerance in adult offspring. 2010. J. Anim. Sci. 88: 3546-3553.
Zhu, M. J, Y. Ma, N. M. Long, M. Du, and S. P. Ford. Maternal Obesity Markedly Increases Placental Fatty Acid Transporter Expression and Fetal Blood Triglycerides at Mid-gestation in the Ewe.2010. Am. J. Physiol. – Regul., Integr. and Compar. Physiol. 299: R1224-R1231
Zhang, L, N. M. Long, S. M. Hein, Y. Ma, P. W. Nathanielsz, S. P. Ford. Diet-Induced maternal obesity at conception and throughout gestation increases fetal pancreatic β-cell losses in late gestation, resulting in decreased circulating insulin concentration at term. 2011. Domestic Anim. Endocrinol. 40: 30-39.
N. M. Long, S. P. Ford, and P. W. Nathanielsz. Maternal obesity eliminates the neonatal lamb plasma leptin peak. . J.Physiol. 2011.589:1455-1462.
M.J. Prado-Cooper, N. M. Long, and R.P. Wettemann. Relationship of ruminal temperature with parturition and estrus of beef cows.2011 J. Anim. Sci. 89:1020-1027.
Yan X, Y. Huang, J. Zhao, N. M. Long, A. B. Uthlaut, M. J. Zhu, S. P. Ford, P. W. Nathanielsz, and M. Du. Maternal over-nutrition impaired insulin signaling, and induced lipid accumulation and fibrosis in skeletal muscle of offspring. Biol. Reprod. 2011. 85:172-178.
S. P. Ford and N. M. Long. Evidence of similar changes in offspring phenotype following either maternal undernutrition and overnutrition: potential impact on fetal epigenetic mechanism. Reproduction, Fertility, and Development 2012, 24:105-111.
Long, N. M., C. B. Tousley, S. P. Ford, W. J. Means, B. W. Hess, and M. Du. Effects of early to mid gestational undernutrition on offspring growth, carcass characteristics and histology of adipose tissue in the bovine. J. Anim. Sci. 2012, 90:197-206.
Huang, Y., J. Zhao, X. Yan. M. J. Zhu, N. M. Long, R. J. McCormick, S. P. Ford, P. W. Nathanielsz, and M. Du. Maternal obesity enhances collagen accumulation and cross-linking in skeletal muscle of ovine offspring. PLOS One 2012 7:e31691.
Long, N. M., P.W. Nathanielsz, and S. P. Ford. The impact of maternal overnutrition and obesity on hypothalamic-pituitary-adrenal axis response of offspring to stress. Dom. Anim. Endocrin 2012, 42:195-202.
George, L. A., L. Zhang, N. Tuersunjiang, Y. Ma, N. M. Long, A. B. Uthlaut, D. T. Smith, P. W. Nathanielsz, and S. P. Ford. Impact of maternal nutrient restriction in the sheep on feed intake, glucose metabolism and insulin secretion in aged female offspring. Am. J. Physiol. – Regul., Integr. and Compar. Physiol. 2012, 302:R795–R804.
Long, N. M., D. C. Rule, M. J. Zhu, P.W. Nathanielsz, and S. P. Ford. Maternal obesity increases fetal adiposity and upregulated nutrient transporters in fetal fat depots and muscle in late gestation. J. Anim. Sci. 2012, 90:2201–2210.
Long, N. M., D. R. Shasa, P. W. Nathanielsz, and S. P. Ford. Growth and insulin dynamics in two generations of female offspring of mothers receiving a single course of synthetic glucocorticoids. Am. J. OB and Gyn. 2012, 207:203.e1-8.
Long, N. M., , R. J. Collier, and J. F. Smith. Short communication: Comparison of 2 methods of assessing calf birth weights in dairy calves. J. Dairy Sci.2012, 95 :7206–7209.
Long, N. M., P. W. Nathanielsz, and S. P. Ford. Transgenerational effects of fetal dexamethasone exposure on the hypothalamic-pituitary-adrenal axis of first and second generation female offspring. Am. J. OB and Gyn. 2013, 208:217.e1-8.
Long, N. M., N. Tuersunjiang, L. A. George, C. O. Lemley, Y. Ma, W. J. Murdoch, P. W. Nathanielsz, S. P. Ford. Maternal nutrient restriction in the ewe from early to midgestation programs reduced steroidogenic enzyme expression and tended to reduce progesterone content of corpora lutea, as well as circulating progesterone in nonpregnant aged female offspring. Biol. Reprod. Endocrinol. 2013. 11:34
Nathanielsz, P. W., S. P. Ford, N. M. Long, C. C. Vega, L. A. Reyes-Castro, and E. Zambrano. Interventions designed to prevent adverse programming outcomes resulting from exposure to maternal obesity during development. Nutr. Rev. 2013 71: S78-S87
Long, N. M. D. T. Smith, S. P. Ford, and P. W. Nathanielsz. Elevated Glucocorticoids during Ovine Pregnancy increase Appetite and produce Glucose Dysregulation and Adiposity in Their Granddaughters in response to ad libitum feeding at one year of age. Am. J. OB and Gyn. 2013 209: e1-353. e9
Tuersunjiang, N, J. F. Odhiambo1, N. M. Long, D. R. Shasa, P. W. Nathanielsz, and S. P. Ford. Diet reduction to requirements in previously obese/overfed ewes at early gestation prevents glucose-insulin dysregulation and returns fetal adiposity and organ development to control levels. Am. J. Physiol. –Endocrin. And Metabolism. 2013 305: E868-E878
Long N. M. and D. W. Schafer. Sex effects changes in plasma leptin in newborn and postnatal beef calves. Professional Animal Scientist. 2013 29:601-605
Long, N. M., T. A. Burns, G. Volpi Lagreca, M. Alende, and S. K. Duckett Palmitoleic acid infusion acutely affects glucose and insulin action in obese lambs Journal of Metabolic Syndrome.2014 3: 148
M. J. Cooper-Prado, N. M. Long, M. P. Davis, E. C. Wright, R. D. Madden, J. W. Dilwith, C. L. Bailey, L. J. Spicer, and R. P. Wettemann. Maintenance energy requirements of beef cows and relationship with cow and calf performance, metabolic hormones, and functional proteins. J. Anim. Sci 2014, 92:3300-3315
Long N. M., T. A. Burns, S. K. Duckett, and D. W. Schafer. Reproductive performance of underdeveloped beef heifers supplemented with saturated or unsaturated rumen bypass fat compared to an isocaloric control. Professional Animal Scientist. 2014 30:502-509
E. Zambrano, N. Tuersunjiang, N. M. Long. L. A. Cox, S. P. Ford, P. W. Nathanielsz, C. Li. Increased central and peripheral glucocorticoid synthesis act as an orchestrator of developmental programming. To be published in “Stress and Developmental Programming of Health and Disease: Beyond Phenomenology” NOVA SCIENCE PUBLISHERS, Hauppauge, NY 2014
Duckett, S. K., M. C. Miller, G. Volpi Lagreca, M. Alende, J. G. Andrae, and N. M. Long. Effect of palmitoleic acid infusion on plasma, muscle and adipose tissue fatty acids and lipogenic gene expression in obese sheep. Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy 2014, 7:553–563
Shasa D. R., J. F. Odhiambo1, N. M. Long, P. W. Nathanielsz, and S. P. Ford. Transgenerational Impact of Maternal Overnutrition/Obesity on Offspring Appetite, Adiposity, and Insulin Resistance. . International Journal of Obesity. 2015, 39: 695-701
Stowe H. M., M. Miller, S. M. Calcatera, M. D. Owens, G. E. Aiken, F. N. Schrick, N. M. Long, S. K. Duckett, J. G Andrae, S. L. Pratt. Bulls Grazing Toxic Tall Fescue Exhibit Impaired Growth, Semen Quality and Decreased Semen Freezing Potential. Therio. 2015, 83:408–414
Long, N. M., D. C. Rule, N. Tuersunjiang, P. W. Nathanielsz, and S. P. Ford. Maternal obesity increases fatty acid synthesis, upregulates nutrient transporters, and increases adiposity in adult male offspring. PLOS 1. 2015, 10(4): e0122152.
Mangrum, K. S., G. Tuttle, S. K. Duckett, G. S. Sell, C. R. Krehbiel, and N. M. Long. The effect of supplementing rumen undegradable unsaturated fatty acids on marbling in early-weaned steers. J. Anim. Sci., 2016, 94:833–844
Wilson T. B., N. M. Long, D. B. Faulkner, and D. W. Shike. Influence of excessive dietary protein intake during late gestationon drylot beef cow performance and progeny growth, carcass characteristics, and plasma glucose and insulin concentrations. J. Anim. Sci. 2016.94:2035–2046.
Zinn, S. A., S. L. Ivey, D. L. Lalman, N. M. Long, and R. A. Zinn. Beef Cattle Nutrition Symposium: Feeding Holstein Steers. J. Anim. Sci. 2016. In press