Research Topics
| M F SmithSummaryAffiliation: University of Missouri Country: USA Publications
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Publications
Ovarian tissue remodeling: role of matrix metalloproteinases and their inhibitorsMichael F Smith
Department of Animal Sciences, 160 Animal Science Research Center, University of Missouri, Columbia, MO 65211, USA
Mol Cell Endocrinol 191:45-56. 2002..From these studies, many potential key regulators of ovarian ECM remodeling have been identified. This review presents evidence for the involvement of MMPs and TIMPs in ECM remodeling associated with follicular and luteal function...- Production of matrix metalloproteinases by cultured bovine theca and granulosa cellsM F Smith
Department of Animal Science, University of Missouri Columbia, Columbia MO 65211, USA
Reproduction 129:75-87. 2005..In summary, thecal and granulosal cells secrete gelatinolytic and caseinolytic MMPs and thecal cell production of gelatinase A was stimulated by LH... - Comparison of progestin-based protocols to synchronize estrus and ovulation before fixed-time artificial insemination in postpartum beef cowsD J Schafer
Division of Animal Sciences, University of Missouri, Columbia 65211, USA
J Anim Sci 85:1940-5. 2007..Both protocols provide opportunities for beef producers to utilize AI and potentially eliminate the need to detect estrus... - Follicular dynamics and steroid profiles in cows during and after treatment with progestin-based protocols for synchronization of estrusJ E Stegner
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 82:1022-8. 2004..This study suggests that follicular competence is likely related to steroidogenic capacity of the follicle and the endocrine environment under which growth and subsequent ovulation of the dominant follicle occurs... - Comparison of protocols to synchronize estrus and ovulation in estrous-cycling and prepubertal beef heifersN R Leitman
Division of Animal Science, S132 ASRC, University of Missouri, Columbia 65211, USA
J Anim Sci 86:1808-18. 2008..01) compared with T2. In summary, CIDR Select improved (P < 0.01) the synchrony of estrus and ovulation compared with Select Synch + CIDR... - A comparison of progestin-based protocols to synchronize estrus in postpartum beef cowsJ E Stegner
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 82:1016-21. 2004..Synchrony of estrus, defined as the variance in the interval to estrus from PG, however, was improved following treatment with the 7-11 Synch protocol... - Comparison of short-term progestin-based protocols to synchronize estrus and ovulation in postpartum beef cowsD J Wilson
Division of Animal Science, S132 ASRC, University of Missouri, Columbia 65211, USA
J Anim Sci 88:2045-54. 2010.... - Development of the ovary and ontongeny of mRNA and protein for P450 aromatase (arom) and estrogen receptors (ER) alpha and beta during early fetal life in cattleH A Garverick
University of Missouri, Division of Animal Sciences, 920 E Campus Drive, Columbia, MO 65211, USA
Anim Reprod Sci 117:24-33. 2010..Thus, in cattle, estradiol-17beta has the potential to regulate, in an autocrine/paracrine manner, a number of different cell types during ovarian development... - Timing of artificial insemination in postpartum beef cows following administration of the CO-Synch + controlled internal drug-release protocolD C Busch
Division of Animal Science, S132 ASRC, University of Missouri, Columbia 65211, USA
J Anim Sci 86:1519-25. 2008..30), and there was no difference between treatments in final pregnancy rates (P = 0.77). In summary, pregnancy rates resulting from FTAI following CO-Synch + CIDR at 66 h were greater than those resulting from FTAI at 54 h... - Effect of ovulatory follicle size and expression of estrus on progesterone secretion in beef cowsD C Busch
Division of Animal Science, University of Missouri, Columbia, Missouri 65211, USA
J Anim Sci 86:553-63. 2008..32) to AI. In summary, P4 secretion after GnRH-induced ovulation of SF was decreased from d 2 to 12 compared with that of LF, but was similar among pregnant cows from d 14 to 60 postAI (d 0)... - A comparison of progestin-based protocols to synchronize ovulation and facilitate fixed-time artificial insemination in postpartum beef cowsJ F Bader
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 83:136-43. 2005..Both protocols provide opportunities for beef producers to use AI and eliminate the need to detect estrus... - Gonadotropin-releasing hormone-induced ovulation and luteinizing hormone release in beef heifers: effect of day of the cycleJ A Atkins
Division of Animal Sciences, University of Missouri, Columbia 65211, USA
J Anim Sci 86:83-93. 2008..Treatment with GnRH 1 in the earlier part of the estrous cycle (on or before d 10) increased the proportion of dominant follicles that were large enough to respond to GnRH 2 (>/=10 mm) and increased ovulatory response after GnRH 2... - Effect of short-term calf removal at three stages of a follicular wave on fate of a dominant follicle in postpartum beef cowsB E Salfen
Department of Animal Sciences, University of Missouri-Columbia, 65211-5300, USA
J Anim Sci 79:2688-97. 2001.... - Comparison of long-term CIDR-based protocols to synchronize estrus in beef heifersN R Leitman
Division of Animal Science, University of Missouri, Columbia, S132 ASRC, 920 E Campus Dr, Columbia, MO 65211, USA
Anim Reprod Sci 114:345-55. 2009.... - Factors affecting preovulatory follicle diameter and ovulation rate after gonadotropin-releasing hormone in postpartum beef cows. Part II: Anestrous cowsJ A Atkins
Division of Animal Sciences, University of Missouri, Columbia, Missouri 65211, USA
J Anim Sci 88:2311-20. 2010..Large follicles were already larger 5 d before GnRH2 but grew at a rate similar to small follicles; follicle size was positively correlated with serum concentrations of estradiol at the time of GnRH-induced ovulation... - Comparison of controlled internal drug release insert-based protocols to synchronize estrus in prepubertal and estrous-cycling beef heifersN R Leitman
Division of Animal Science, S132 ASRC, University of Missouri, Columbia 65211, USA
J Anim Sci 87:3976-82. 2009..94). We conclude that the administration of GnRH 9 d after CIDR removal in the CIDR Select protocol is not required to facilitate an improvement in the synchrony of estrus in beef heifers... - Comparison of progestin-based estrus synchronization protocols before fixed-time artificial insemination on pregnancy rate in beef heifersD C Busch
Division of Animal Science, S132 ASRC, University of Missouri, Columbia 65211, USA
J Anim Sci 85:1933-9. 2007..In summary, the CIDR Select protocol resulted in a greater and more synchronous estrous response and significantly greater fixed-time AI pregnancy rates compared with the CO-Synch + CIDR protocol... - Factors affecting preovulatory follicle diameter and ovulation rate after gonadotropin-releasing hormone in postpartum beef cows. Part I: Cycling cowsJ A Atkins
Division of Animal Sciences, University of Missouri, Columbia, Missouri 65211, USA
J Anim Sci 88:2300-10. 2010..Cows that ovulated a small follicle had reduced serum concentrations of estradiol at GnRH2 and progesterone after ovulation... - Gonadotropin requirements for dominant follicle selection in GnRH agonist-treated cowsJ H Hampton
Department of Animal Sciences, 163 Animal Science Research Center, University of Missouri, Columbia, Missouri 65211, USA
Reproduction 127:695-703. 2004..03). These results indicate that while FSH can support bovine follicular growth >10 mm, LH increases androgen production and expression of P450c17... - Fixed-time artificial insemination of postpartum beef cows at 72 or 80 h after treatment with the MGA Select protocolJ E Stegner
Department of Animal Science, University of Missouri, S132 ASRC, Columbia, MO 65211, USA
Theriogenology 61:1299-305. 2004..1 ) between treatments (98/108 (91%), 72 h; 88/103 (85%), 80 h). In conclusion, pregnancy rates were higher when postpartum beef cows synchronized with the MGA Select protocol were inseminated at 72 h versus 80 h after PG... - Improved synchrony of estrus and ovulation with the addition of GnRH to a melengestrol acetate-prostaglandin F2alpha synchronization treatment in beef heifersS L Wood
Department of Animal Sciences, University of Missouri, Columbia 65211, USA
J Anim Sci 79:2210-6. 2001..This protocol may offer potential for the fixed-time insemination of replacement beef heifers... - Comparison of long-term progestin-based estrus synchronization protocols in beef heifersD A Mallory
Division of Animal Science, S132 ASRC, University of Missouri, Columbia, 65211, USA
J Anim Sci 88:3568-78. 2010..1) between treatments. In summary, the Show-Me-Synch protocol compared favorably with the MGA-PG protocol on the basis of estrous response, synchrony of estrus, and resulting fertility after treatment administration... - Estrus synchronization in beef heifers with progestin-based protocols. I. Differences in response based on pubertal status at the initiation of treatmentS L Wood-Follis
Department of Animal Sciences, Patterson, S132 ASRC, University of Missouri Columbia, MO 65211, USA
Theriogenology 62:1518-28. 2004..Further studies are needed to define production systems in which the MGA Select protocol is warranted for use in beef heifers... - Ability of intravaginal progesterone inserts and melengestrol acetate to induce estrous cycles in postpartum beef cowsG A Perry
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 82:695-704. 2004..Treatment with MGA (normal or high dose) did not induce ovulation earlier than in control cows, but a high dose of MGA increased the percentage of cows with normal luteal life spans following the first ovulation postpartum... - Influence of undegraded intake protein on reproductive performance of primiparous beef heifers maintained on stockpiled fescue pastureT A Strauch
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 79:574-81. 2001..01) corresponded to a decrease in postpartum interval of 0.13 d. Based on the results of this study, the inclusion of UIP in diets for primiparous heifers and its effects on postpartum interval warrant further evaluation... - Morphological development and characterization of aromatase and estrogen receptors alpha and beta in fetal ovaries of cattle from days 110 to 250M N Burkhart
University of Missouri, Division of Animal Sciences, 920 E Campus Drive, Columbia, MO 65211, USA
Anim Reprod Sci 117:43-54. 2010..Thus, the fetal ovary of cattle has the steroidogenic enzyme (P450arom) to convert androgens to estradiol-17beta, and estrogen receptors alpha and beta to facilitate an estrogen response within the fetal ovary... - Evaluation of a fixed-time artificial insemination protocol for postpartum suckled beef cowsG A Perry
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 80:3060-4. 2002..In summary, pregnancy rates resulting from fixed-time AI may be improved with treatment of MGA prior to a GnRH-PG-GnRH protocol... - Comparison of long-term progestin-based protocols to synchronize estrus before fixed-time artificial insemination in beef heifersD A Mallory
Division of Animal Science, S132 Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
J Anim Sci 89:1358-65. 2011..The reduced treatment cost and animal handling associated with administration of the Show-Me-Synch protocol offer distinct advantages over the CIDR Select protocol despite similarities in pregnancy rates resulting from FTAI... - Androgen receptor mRNA expression in the bovine ovaryJ H Hampton
Department of Animal Sciences, 163 Animal Science Research Center, University of Missouri, East Campus Dr, Columbia, MO 65211, USA
Domest Anim Endocrinol 27:81-8. 2004..002). These data provide evidence of AR mRNA expression in bovine follicles and suggest that AR mRNA increases during early follicle development... - Oxytocin-induced secretion of prostaglandin F2alpha in postpartum beef cows: effects of progesterone and estradiol-17beta treatmentK R Kieborz-Loos
Animal Sciences Department, University of Missouri, Columbia 65211, USA
J Anim Sci 81:1830-6. 2003..Therefore, estradiol-17beta and progesterone were both associated with the timing of PGF2, secretion in postpartum cows... - A simulation exercise to teach principles of bovine reproductive managementG A Perry
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 82:1543-9. 2004.... - Effect of an orally active progestin on follicular dynamics in cycling and anestrous postpartum beef cowsG A Perry
Department of Animal Science, University of Missouri, Columbia 65211, USA
J Anim Sci 80:1932-8. 2002.... - Effect of epidermal growth factor and insulin-like growth factor I on porcine preantral follicular growth, antrum formation, and stimulation of granulosal cell proliferation and suppression of apoptosis in vitroJ Mao
Department of Animal Sciences, University of Missouri-Columbia, Columbia, MI 65211, USA
J Anim Sci 82:1967-75. 2004..These results may provide useful information for developing a preantral follicular culture system in which the oocytes are capable of fertilization and embryonic development... - Gonadotropin induction of ovulation and corpus luteum formation in young estrogen receptor-alpha knockout miceC S Rosenfeld
Departments of Animal Sciences and Biochemistry and Child Health, University of Missouri at Columbia, Columbia, Missouri 65211, USA
Biol Reprod 62:599-605. 2000..On the basis of these findings, ovarian folliculogenesis, ovulation, and CL formation can occur in the absence of ERalpha, although to a lesser extent than in WT mice... - Molecular cloning of an ovine ovarian tissue inhibitor of metalloproteinases: ontogeny of messenger ribonucleic acid expression and in situ localization within preovulatory follicles and luteal tissueG W Smith
Department of Animal Science, University of Missouri, Columbia 65211
Endocrinology 134:344-52. 1994.... - Encouraging science reading beyond the curriculumW R Lamberson
Division of Animal Sciences, University of Missouri, Columbia, 65211, USA
J Anim Sci 83:1972-5. 2005..Although no improvement of retention could be documented from this project, our objective of encouraging students to engage in reading material supplemental to courses in genetics and reproductive physiology was satisfied... - Use of critical interactive thinking exercises in teaching reproductive physiology to undergraduate studentsM W Peters
Department of Animal Science, Michigan State University, East Lansing 48824-1225, USA
J Anim Sci 80:862-5. 2002..The general concept can be readily applied to courses in other subject areas in the animal sciences... - Distinct cellular localization and regulation of endothelin-1 and endothelin-converting enzyme-1 expression in the bovine corpus luteum: implications for luteolysisN Levy
Department of Animal Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel
Endocrinology 142:5254-60. 2001..Low ECE-1 levels during the early luteal phase, restricting the production of active ET-1, may explain why the immature CL is able to withstand PGF(2 alpha)-induced luteolysis... - Role of ascorbic acid in promoting follicle integrity and survival in intact mouse ovarian follicles in vitroA A Murray
Department of Biomedical Sciences, Hugh Robson Building, University of Edinburgh, George Square, Edinburgh EH8 9XD, UK
Reproduction 121:89-96. 2001.... - Relationship between size of the ovulatory follicle and pregnancy success in beef heifersG A Perry
USDA ARS, Fort Keogh Livestock and Range Research Laboratory, Miles City, MT 59301, USA
J Anim Sci 85:684-9. 2007....