Stephen M. Downs - Publications

Affiliations: 
Biological Sciences Marquette University, Milwaukee, WI, United States 
Area:
General Biology, Human Development, Evolution and Development Biology

83 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2015 Valsangkar DS, Downs SM. Acetyl CoA carboxylase inactivation and meiotic maturation in mouse oocytes. Molecular Reproduction and Development. 82: 679-93. PMID 26043180 DOI: 10.1002/Mrd.22505  0.806
2015 Downs SM. Nutrient pathways regulating the nuclear maturation of mammalian oocytes. Reproduction, Fertility, and Development. 27: 572-82. PMID 25798589 DOI: 10.1071/Rd14343  0.447
2014 Ya R, Downs SM. Perturbing microtubule integrity blocks AMP-activated protein kinase-induced meiotic resumption in cultured mouse oocytes. Zygote (Cambridge, England). 22: 91-102. PMID 23199370 DOI: 10.1017/S0967199412000457  0.821
2013 Valsangkar D, Downs SM. A requirement for fatty acid oxidation in the hormone-induced meiotic maturation of mouse oocytes. Biology of Reproduction. 89: 43. PMID 23863407 DOI: 10.1095/Biolreprod.113.109058  0.795
2013 Ya R, Downs SM. Suppression of chemically induced and spontaneous mouse oocyte activation by AMP-activated protein kinase. Biology of Reproduction. 88: 70. PMID 23390161 DOI: 10.1095/Biolreprod.112.106120  0.818
2012 Valsangkar D, Downs SM. Fatty Acid Oxidation and Hormone-Induced Meiotic Resumption in Mouse Oocytes. Biology of Reproduction. 87: 308-308. DOI: 10.1093/Biolreprod/87.S1.308  0.744
2011 Downs SM. Mouse versus rat: Profound differences in meiotic regulation at the level of the isolated oocyte. Molecular Reproduction and Development. 78: 778-94. PMID 21953615 DOI: 10.1002/Mrd.21377  0.489
2011 Valsangkar D, Downs SM. Acetyl CoA Carboxylase and Meiotic Maturation in Mouse Oocytes. Biology of Reproduction. 85: 597-597. DOI: 10.1093/Biolreprod/85.S1.597  0.765
2011 Ya R, Downs SM. Stimulation of AMP-Activated Protein Kinase Promotes Maturation and Suppresses Spontaneous Activation of Mouse Oocytes. Biology of Reproduction. 85: 596-596. DOI: 10.1093/Biolreprod/85.S1.596  0.807
2010 Downs SM, Ya R, Davis CC. Role of AMPK throughout meiotic maturation in the mouse oocyte: evidence for promotion of polar body formation and suppression of premature activation. Molecular Reproduction and Development. 77: 888-99. PMID 20830737 DOI: 10.1002/Mrd.21229  0.813
2010 Downs SM. Regulation of the G2/M transition in rodent oocytes. Molecular Reproduction and Development. 77: 566-85. PMID 20578061 DOI: 10.1002/Mrd.21175  0.364
2010 Ya R, Downs SM. Microtubule Integrity Influences the Activity and Localization of AMP-Activated Protein Kinase During Mouse Oocyte Maturation. Biology of Reproduction. 83: 325-325. DOI: 10.1093/Biolreprod/83.S1.325  0.794
2010 Downs SM. Mouse Versus Rat: Profound Differences in Meiotic Regulation at the Level of the Cumulus-Enclosed Oocyte. Biology of Reproduction. 83: 320-320. DOI: 10.1093/Biolreprod/83.S1.320  0.362
2009 Chen J, Chi MM, Moley KH, Downs SM. cAMP pulsing of denuded mouse oocytes increases meiotic resumption via activation of AMP-activated protein kinase. Reproduction (Cambridge, England). 138: 759-70. PMID 19700529 DOI: 10.1530/Rep-08-0535  0.534
2009 Downs SM, Mosey JL, Klinger J. Fatty acid oxidation and meiotic resumption in mouse oocytes. Molecular Reproduction and Development. 76: 844-53. PMID 19455666 DOI: 10.1093/Biolreprod/78.S1.135B  0.605
2009 Downs SM, Davis C. The Participation of AMP-Activated Protein Kinase Throughout Meiotic Maturation in Mouse Oocytes. Biology of Reproduction. 81: 277-277. DOI: 10.1093/Biolreprod/81.S1.277  0.501
2008 Chen J, Downs SM. AMP-activated protein kinase is involved in hormone-induced mouse oocyte meiotic maturation in vitro. Developmental Biology. 313: 47-57. PMID 18048025 DOI: 10.1016/J.Ydbio.2007.09.043  0.559
2008 Downs SM, Chen J. EGF-like peptides mediate FSH-induced maturation of cumulus cell-enclosed mouse oocytes. Molecular Reproduction and Development. 75: 105-14. PMID 17549700 DOI: 10.1002/Mrd.20781  0.483
2007 LaRosa C, Downs SM. Meiotic induction by heat stress in mouse oocytes: involvement of AMP-activated protein kinase and MAPK family members. Biology of Reproduction. 76: 476-86. PMID 17108331 DOI: 10.1095/Biolreprod.106.057422  0.733
2007 Chen J, Downs S. AMP-ACTIVATED PROTEIN KINASE (AMPK) IS INVOLVED IN FOLLICLE-STIMULATING HORMONE (FSH)-INDUCED MOUSE OOCYTE MEIOTIC MATURATION Biology of Reproduction. 77: 141-141. DOI: 10.1093/Biolreprod/77.S1.141  0.591
2006 Downs SM, Chen J. Induction of meiotic maturation in mouse oocytes by adenosine analogs. Molecular Reproduction and Development. 73: 1159-68. PMID 16804878 DOI: 10.1002/Mrd.20439  0.572
2006 Chen J, Hudson E, Chi MM, Chang AS, Moley KH, Hardie DG, Downs SM. AMPK regulation of mouse oocyte meiotic resumption in vitro. Developmental Biology. 291: 227-38. PMID 16443210 DOI: 10.1016/J.Ydbio.2005.11.039  0.595
2006 Downs SM, Gilles R, Vanderhoef C, Humpherson PG, Leese HJ. Differential response of cumulus cell-enclosed and denuded mouse oocytes in a meiotic induction model system. Molecular Reproduction and Development. 73: 379-89. PMID 16362973 DOI: 10.1002/Mrd.20416  0.412
2006 LaRosa C, Downs SM. Stress stimulates AMP-activated protein kinase and meiotic resumption in mouse oocytes. Biology of Reproduction. 74: 585-92. PMID 16280415 DOI: 10.1095/Biolreprod.105.046524  0.752
2005 LaRosa C, Downs SM. MEK inhibitors block AICAR-induced maturation in mouse oocytes by a MAPK-independent mechanism. Molecular Reproduction and Development. 70: 235-45. PMID 15570612 DOI: 10.1002/Mrd.20200  0.775
2004 Colton SA, Downs SM. Potential role for the sorbitol pathway in the meiotic dysfunction exhibited by oocytes from diabetic mice. Journal of Experimental Zoology. Part a, Comparative Experimental Biology. 301: 439-48. PMID 15114651 DOI: 10.1002/Jez.A.20070  0.439
2003 Downs SM, Verhoeven A. Glutamine and the maintenance of meiotic arrest in mouse oocytes: influence of culture medium, glucose, and cumulus cells. Molecular Reproduction and Development. 66: 90-7. PMID 12874804 DOI: 10.1002/Mrd.10326  0.442
2003 Colton SA, Humpherson PG, Leese HJ, Downs SM. Physiological changes in oocyte-cumulus cell complexes from diabetic mice that potentially influence meiotic regulation. Biology of Reproduction. 69: 761-70. PMID 12724281 DOI: 10.1095/Biolreprod.102.013649  0.383
2002 Downs SM. The biochemistry of oocyte maturation Ernst Schering Research Foundation Workshop. 81-99. PMID 12402541  0.394
2002 Colton SA, Pieper GM, Downs SM. Altered meiotic regulation in oocytes from diabetic mice Biology of Reproduction. 67: 220-231. PMID 12080021 DOI: 10.1095/Biolreprod67.1.220  0.383
2002 Downs SM, Hudson ER, Hardie DG. A potential role for AMP-activated protein kinase in meiotic induction in mouse oocytes. Developmental Biology. 245: 200-12. PMID 11969266 DOI: 10.1006/Dbio.2002.0613  0.593
2002 Downs SM, Humpherson PG, Leese HJ. Pyruvate utilization by mouse oocytes is influenced by meiotic status and the cumulus oophorus Molecular Reproduction and Development. 62: 113-123. PMID 11933168 DOI: 10.1002/Mrd.10067  0.453
2001 Downs SM. A gap-junction-mediated signal, rather than an external paracrine factor, predominates during meiotic induction in isolated mouse oocytes Zygote. 9: 71-82. PMID 11273034 DOI: 10.1017/S0967199401001071  0.422
2001 Downs SM, Cottom J, Hunzicker-Dunn M. Protein kinase C and meiotic regulation in isolated mouse oocytes Molecular Reproduction and Development. 58: 101-115. PMID 11144213 DOI: 10.1002/1098-2795(200101)58:1<101::Aid-Mrd13>3.0.Co;2-J  0.575
2001 Downs SM, Ruan B, Schroepfer J. Meiosis-activating sterol and the maturation of isolated mouse oocytes Biology of Reproduction. 64: 80-89. PMID 11133661 DOI: 10.1095/Biolreprod64.1.80  0.503
2000 Downs SM, Hudson ED. Energy substrates and the completion of spontaneous meiotic maturation Zygote. 8: 339-351. PMID 11108555 DOI: 10.1017/S0967199400001131  0.382
2000 Downs SM. Adenosine blocks hormone-induced meiotic maturation by suppressing purine de novo synthesis Molecular Reproduction and Development. 56: 172-179. PMID 10813849 DOI: 10.1002/(Sici)1098-2795(200006)56:2<172::Aid-Mrd8>3.0.Co;2-2  0.557
1999 Downs SM. Uptake and metabolism of adenosine mediate a meiosis-arresting action on mouse oocytes Molecular Reproduction and Development. 53: 208-221. PMID 10331459 DOI: 10.1002/(Sici)1098-2795(199906)53:2<208::Aid-Mrd10>3.0.Co;2-O  0.465
1999 Downs SM, Utecht AM. Metabolism of radiolabeled glucose by mouse oocytes and oocyte-cumulus cell complexes Biology of Reproduction. 60: 1446-1452. PMID 10330104 DOI: 10.1095/Biolreprod60.6.1446  0.346
1998 Downs SM. Precursors of the purine backbone augment the inhibitory action of hypoxanthine and dibutyryl cAMP on mouse oocyte maturation Journal of Experimental Zoology. 282: 376-384. PMID 9755485 DOI: 10.1002/(Sici)1097-010X(19981015)282:3<376::Aid-Jez10>3.0.Co;2-D  0.412
1998 Downs SM, Humpherson PG, Leese HJ. Meiotic induction in cumulus cell-enclosed mouse oocytes: Involvement of the pentose phosphate pathway Biology of Reproduction. 58: 1084-1094. PMID 9546744 DOI: 10.1095/Biolreprod58.4.1084  0.492
1997 Downs SM, Houghton FD, Humpherson PG, Leese HJ. Substrate utilization and maturation of cumulus cell-enclosed mouse oocytes: Evidence that pyruvate oxidation does not mediate meiotic induction Journal of Reproduction and Fertility. 110: 1-10. PMID 9227351 DOI: 10.1530/Jrf.0.1100001  0.427
1997 Downs SM. Hypoxanthine regulation of oocyte maturation in the mouse: Insights using hypoxanthine phosphoribosyltransferase-deficient animals Biology of Reproduction. 57: 54-62. PMID 9209080 DOI: 10.1095/Biolreprod57.1.54  0.557
1997 Downs SM, Mastropolo AM. Culture conditions affect meiotic regulation in cumulus cell-enclosed mouse oocytes Molecular Reproduction and Development. 46: 551-566. PMID 9094102 DOI: 10.1002/(Sici)1098-2795(199704)46:4<551::Aid-Mrd13>3.0.Co;2-Z  0.457
1997 Downs SM. Involvement of purine nucleotide synthetic pathways in gonadotropin- induced meiotic maturation in mouse cumulus cell-enclosed oocytes Molecular Reproduction and Development. 46: 155-167. PMID 9021747 DOI: 10.1002/(Sici)1098-2795(199702)46:2<155::Aid-Mrd6>3.0.Co;2-P  0.558
1997 Dienhart MK, O'Brien MJ, Downs SM. Uptake and salvage of hypoxanthine mediates developmental arrest in preimplantation mouse embryos Biology of Reproduction. 56: 1-13. PMID 9002627 DOI: 10.1095/Biolreprod56.1.1  0.455
1996 Dienhart MK, Downs SM. Cyclic AMP reversal of hypoxanthine-arrested preimplantation mouse embryos is EDTA-dependent Zygote. 4: 129-137. PMID 8913026 DOI: 10.1017/S0967199400003002  0.461
1996 Downs SM, Humpherson PG, Martin KL, Leese HJ. Glucose utilization during gonadotropin-induced meiotic maturation in cumulus cell-enclosed mouse oocytes. Molecular Reproduction and Development. 44: 121-31. PMID 8722700 DOI: 10.1002/(Sici)1098-2795(199605)44:1<121::Aid-Mrd14>3.0.Co;2-7  0.442
1995 Downs SM. The influence of glucose, cumulus cells, and metabolic coupling on ATP levels and meiotic control in the isolated mouse oocyte Developmental Biology. 167: 502-512. PMID 7875374 DOI: 10.1006/Dbio.1995.1044  0.481
1995 Downs SM, Hunzicker-Dunn M. Differential Regulation of Oocyte Maturation and Cumulus Expansion in the Mouse Oocyte- Cumulus Cell Complex by Site-Selective Analogs of Cyclic Adenosine Monophosphate Developmental Biology. 172: 72-85. PMID 7589815 DOI: 10.1006/Dbio.1995.0006  0.439
1994 Downs SM, Mastropolo AM. The participation of energy substrates in the control of meiotic maturation in murine oocytes Developmental Biology. 162: 154-168. PMID 8125183 DOI: 10.1006/Dbio.1994.1075  0.468
1994 Downs SM. High performance liquid chromatography analysis of hypoxanthine metabolism in mouse oocyte-cumulus cell complexes: Effects of purine metabolic perturbants Biology of Reproduction. 50: 1403-1412. PMID 8080928 DOI: 10.1095/Biolreprod50.6.1403  0.342
1994 Downs SM. Induction of meiotic maturation in vivo in the mouse by IMP dehydrogenase inhibitors: Effects on the developmental capacity of ova Molecular Reproduction and Development. 38: 293-302. PMID 7917281 DOI: 10.1002/Mrd.1080380310  0.423
1993 Downs SM. Purine control of mouse oocyte maturation: Evidence that nonmetabolized hypoxanthine maintains meiotic arrest Molecular Reproduction and Development. 35: 82-94. PMID 8099493 DOI: 10.1002/Mrd.1080350114  0.538
1993 Downs S. Factors affecting the resumption of meiotic maturation in mammalian oocytes Theriogenology. 39: 65-79. DOI: 10.1016/0093-691X(93)90024-Y  0.389
1992 Fagbohun CF, Downs SM. Requirement for glucose in ligand-stimulated meiotic maturation of cumulus cell-enclosed mouse oocytes Journal of Reproduction and Fertility. 96: 681-697. PMID 1339848  0.341
1992 Downs SM, Buccione R, Eppig JJ. Modulation of meiotic arrest in mouse oocytes by guanyl nucleotides and modifiers of G-proteins Journal of Experimental Zoology. 262: 391-404. PMID 1320658 DOI: 10.1002/Jez.1402620405  0.497
1991 Downs SM, Dow MP. Hypoxanthine-maintained two-cell block in mouse embryos: dependence on glucose and effect of hypoxanthine phosphoribosyltransferase inhibitors. Biology of Reproduction. 44: 1025-39. PMID 1873380 DOI: 10.1095/Biolreprod44.6.1025  0.374
1991 Fagbohun CF, Downs SM. Metabolic coupling and ligand-stimulated meiotic maturation in the mouse oocyte-cumulus cell complex Biology of Reproduction. 45: 851-859. PMID 1666851 DOI: 10.1095/Biolreprod45.6.851  0.465
1991 Downs SM, Dow MP, Fagbohun CF. The meiotic response of cumulus cell-enclosed mouse oocytes to follicle-stimulating hormone in the presence of different macromolecules. The Journal of Experimental Zoology. 258: 373-83. PMID 1653817 DOI: 10.1002/Jez.1402580313  0.498
1990 Downs SM. Stimulation of parthenogenesis in mouse ovarian follicles by inhibitors of inosine monophosphate dehydrogenase Biology of Reproduction. 43: 427-436. PMID 2271723 DOI: 10.1095/Biolreprod43.3.427  0.474
1990 Downs SM. Protein synthesis inhibitors prevent both spontaneous and hormone-dependent maturation of isolated mouse oocytes Molecular Reproduction and Development. 27: 235-243. PMID 2127675 DOI: 10.1002/Mrd.1080270309  0.514
1990 Fagbohun CF, Downs SM. Maturation of the mouse oocyte-cumulus cell complex: Stimulation by lectins Biology of Reproduction. 42: 413-423. PMID 1692744 DOI: 10.1095/Biolreprod42.3.413  0.58
1989 Downs SM. Specificity of epidermal growth factor action on maturation of the murine oocyte and cumulus oophorus in vitro Biology of Reproduction. 41: 371-379. PMID 2508778 DOI: 10.1095/Biolreprod41.2.371  0.352
1989 Downs SM, Daniel SAJ, Bornslaeger EA, Hoppe PC, Eppig JJ. Maintenance of meiotic arrest in mouse oocytes by purines: modulation of cAMP levels and cAMP phosphodiesterase activity Gamete Research. 23: 323-334. PMID 2476369 DOI: 10.1002/Mrd.1120230309  0.557
1988 Schroeder AC, Downs SM, Eppig JJ. Factors affecting the developmental capacity of mouse oocytes undergoing maturation in vitro Annals of the New York Academy of Sciences. 541: 197-204. PMID 3195905 DOI: 10.1111/J.1749-6632.1988.Tb22256.X  0.423
1988 Eppig JJ, Downs SM. The role of purines in the maintenance of meiotic arrest in mammalian oocytes Progress in Clinical and Biological Research. 267: 103-113. PMID 2907145  0.332
1988 Eppig JJ, Downs SM. Gonadotropin-induced murine oocyte maturation in vivo is not associated with decreased cyclic adenosine monophosphate in the oocyte-cumulus cell complex Gamete Research. 20: 125-131. PMID 2853129 DOI: 10.1002/Mrd.1120200203  0.525
1988 Downs SM, Daniel SAJ, Eppig JJ. Induction of maturation in cumulus cell enclosed mouse oocytes by follicle-stimulating hormone and epidermal growth factor: Evidence for a positive stimulus of somatic cell origin Journal of Experimental Zoology. 245: 86-96. PMID 2832512 DOI: 10.1002/Jez.1402450113  0.545
1987 Eppig JJ, Downs SM. The effect of hypoxanthine on mouse oocyte growth and development in vitro: Maintenance of meiotic arrest and gonadotropin-induced oocyte maturation Developmental Biology. 119: 313-321. PMID 3100361 DOI: 10.1016/0012-1606(87)90037-6  0.526
1987 Downs SM, Eppig JJ. Induction of mouse oocyte maturation in vivo by perturbants of purine metabolism Biology of Reproduction. 36: 431-437. PMID 2883997 DOI: 10.1095/Biolreprod36.2.431  0.495
1986 Downs SM, Eppig JJ. The role of purines in the maintenance of meiotic arrest in mouse oocytes Tokai Journal of Experimental and Clinical Medicine. 11: 463-469. PMID 3445261  0.367
1986 Downs SM, Coleman DL, Eppig JJ. Maintenance of murine oocyte meiotic arrest: uptake and metabolism of hypoxanthine and adenosine by cumulus cell-enclosed and denuded oocytes. Developmental Biology. 117: 174-83. PMID 2875006 DOI: 10.1016/0012-1606(86)90359-3  0.436
1986 Downs SM, Schroeder AC, Eppig JJ. Developmental capacity of mouse oocytes following maintenance of meiotic arrest in vitro Gamete Research. 15: 305-316. DOI: 10.1002/Mrd.1120150404  0.435
1986 Downs SM, Schroeder AC, Eppig JJ. Serum maintains the fertilizability of mouse oocytes matured in vitro by preventing hardening of the zona pellucida Gamete Research. 15: 115-122. DOI: 10.1002/Mrd.1120150203  0.413
1985 Downs SM, Coleman DL, Ward-Bailey PF, Eppig JJ. Hypoxanthine is the principal inhibitor of murine oocyte maturation in a low molecular weight fraction of porcine follicular fluid Proceedings of the National Academy of Sciences of the United States of America. 82: 454-458. PMID 2982158 DOI: 10.1073/Pnas.82.2.454  0.39
1985 Downs SM, Eppig JJ. A follicular fluid component prevents gonadotropin reversal of cyclic adenosine monophosphate-dependent meiotic arrest in murine oocytes Gamete Research. 11: 83-97. DOI: 10.1002/Mrd.1120110109  0.519
1984 Eppig JJ, Downs SM. Chemical signals that regulate mammalian oocyte maturation Biology of Reproduction. 30: 1-11. PMID 6320914 DOI: 10.1095/Biolreprod30.1.1  0.552
1984 Downs SM, Eppig JJ. Cyclic adenosine monophosphate and ovarian follicular fluid act synergistically to inhibit mouse oocyte maturation Endocrinology. 114: 418-427. PMID 6197295 DOI: 10.1210/Endo-114-2-418  0.506
1983 Downs SM, Longo FJ. An ultrastructural study of preovulatory apical development in mouse ovanan follicles: Effects of indomethacin The Anatomical Record. 205: 159-168. PMID 6846867 DOI: 10.1002/Ar.1092050206  0.382
1983 Downs SM, Longo FJ. Prostaglandins and preovulatory follicular maturation in mice Journal of Experimental Zoology. 228: 99-108. PMID 6582216 DOI: 10.1002/Jez.1402280111  0.416
1982 Downs SM, Longo FJ. Effects of indomethacin on preovulatory follicles in immature, superovulated mice American Journal of Anatomy. 164: 265-274. PMID 7124657 DOI: 10.1002/Aja.1001640307  0.456
1982 Downs SM, Longo FJ. Effects of indomethacin on the ultrastructures of mouse preovulatory follicles Anatomical Record. 202.  0.312
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