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Articles 1 - 30 of 923
Full-Text Articles in Medicine and Health Sciences
The Association Between Hospital Obstetrical Volume And Maternal Postpartum Complications, Kathy Kyser, Xin Lu, Donna Santillan, Mark Santillan, Stephen Hunter, Alison Cahill, Peter Cram
The Association Between Hospital Obstetrical Volume And Maternal Postpartum Complications, Kathy Kyser, Xin Lu, Donna Santillan, Mark Santillan, Stephen Hunter, Alison Cahill, Peter Cram
Stephen K. Hunter
OBJECTIVE: The purpose of this study was to examine the relationship between delivery volume and maternal complications. STUDY DESIGN: We used administrative data to identify women who had been admitted for childbirth in 2006. Hospitals were stratified into deciles that were based on delivery volume. We compared composite complication rates across deciles. RESULTS: We evaluated 1,683,754 childbirths in 1045 hospitals. Decile 1 and 2 hospitals had significantly higher rates of composite complications than decile 10 (11.8% and 10.1% vs 8.5%, respectively; P < .0001). Decile 9 and 10 hospitals had modestly higher composite complications as compared with decile 6 (8.8% and …
The Role Of Lef1 In Endometrial Gland Formation And Carcinogenesis, Dawne Shelton, Hubert Fornalik, Traci Neff, Soo Park, David Bender, Koen Degeest, Xiaoming Liu, Weiliang Xie, David Meyerholz, John Engelhardt, Michael Goodheart
The Role Of Lef1 In Endometrial Gland Formation And Carcinogenesis, Dawne Shelton, Hubert Fornalik, Traci Neff, Soo Park, David Bender, Koen Degeest, Xiaoming Liu, Weiliang Xie, David Meyerholz, John Engelhardt, Michael Goodheart
David P Bender
No abstract provided.
The Effects Of Ru-486 On Immune Function And Steroid-Induced Immunosuppression Invitro, Bradley Van Voorhis, Deborah Anderson, Joseph Hill
The Effects Of Ru-486 On Immune Function And Steroid-Induced Immunosuppression Invitro, Bradley Van Voorhis, Deborah Anderson, Joseph Hill
Bradley J Van Voorhis
No abstract provided.
Expression And Localization Of Inducible And Endothelial Nitric Oxide Synthase In The Rat Ovary - Effects Of Gonadotropin Stimulation In Vivo, Bradley Van Voorhis, Kimberly Moore, Paul Strijbos, Scott Nelson, Sally Baylis, Dana Grzybicki, Carl Weiner
Expression And Localization Of Inducible And Endothelial Nitric Oxide Synthase In The Rat Ovary - Effects Of Gonadotropin Stimulation In Vivo, Bradley Van Voorhis, Kimberly Moore, Paul Strijbos, Scott Nelson, Sally Baylis, Dana Grzybicki, Carl Weiner
Bradley J Van Voorhis
No abstract provided.
Nitric-Oxide - An Autocrine Regulator Of Human Granulosa-Luteal Cell Steroidogenesis, Bradley Van Voorhis, Melissa Dunn, Gary Snyder, Carl Weiner
Nitric-Oxide - An Autocrine Regulator Of Human Granulosa-Luteal Cell Steroidogenesis, Bradley Van Voorhis, Melissa Dunn, Gary Snyder, Carl Weiner
Bradley J Van Voorhis
No abstract provided.
Immunohistochemical Localization Of Prostaglandin-H Synthase In The Female Reproductive-Tract And Endometriosis, Bradley Van Voorhis, Phyllis Huettner, Martin Clark, Joseph Hill
Immunohistochemical Localization Of Prostaglandin-H Synthase In The Female Reproductive-Tract And Endometriosis, Bradley Van Voorhis, Phyllis Huettner, Martin Clark, Joseph Hill
Bradley J Van Voorhis
No abstract provided.
Prenatal Detection Of Congenital Heart Disease By Basic Ultrasonography At A Tertiary Care Center: What Should Our Expectations Be?, Kimberly Leslie, W. Persutte, J. Drose, R. Lenke, J. Hobbins, M. Manco-Johnson, E. Shaffer, J. Wiggins
Prenatal Detection Of Congenital Heart Disease By Basic Ultrasonography At A Tertiary Care Center: What Should Our Expectations Be?, Kimberly Leslie, W. Persutte, J. Drose, R. Lenke, J. Hobbins, M. Manco-Johnson, E. Shaffer, J. Wiggins
Kimberly K. Leslie
No abstract provided.
Maternal Serum Alpha-Fetoprotein Levels In Ectopic Pregnancies: A Prospective, Controlled Study, S. Lederman, Kimberly Leslie, Y. Lidor, R. Lenke
Maternal Serum Alpha-Fetoprotein Levels In Ectopic Pregnancies: A Prospective, Controlled Study, S. Lederman, Kimberly Leslie, Y. Lidor, R. Lenke
Kimberly K. Leslie
No abstract provided.
Vascular Endothelial Growth Factor Pathway Blockade In Endometrial Cancer, Suzy Davies, Donghai Dai, Kimberly Leslie
Vascular Endothelial Growth Factor Pathway Blockade In Endometrial Cancer, Suzy Davies, Donghai Dai, Kimberly Leslie
Kimberly K. Leslie
No abstract provided.
Developing An Artificial Fallopian Tube: Successful In Vitro Trials In Mice., Stephen Hunter, J. Neeld, J. Scott, D. Olsen, R. Urry, T. Cichocki
Developing An Artificial Fallopian Tube: Successful In Vitro Trials In Mice., Stephen Hunter, J. Neeld, J. Scott, D. Olsen, R. Urry, T. Cichocki
Stephen K. Hunter
This report describes the design and testing of an artificial fallopian tube for the treatment of tubal infertility. Within the device, mouse eggs incubated with sperm were fertilized and a microinfusion pump was used to transport the fertilized ova through the tube. Normal offspring resulted from transfer of the developing embryos into pseudopregnant recipients. These results provide encouraging evidence that an artificial fallopian tube warrants further investigation as a potential alternative to in vitro fertilization.
Molecular Weight Characterization Of Pre- And Postimplant Artificial Heart Polyurethane Materials., Stephen Hunter, D Gregonis, D Colman, J Andrade, T Kessler
Molecular Weight Characterization Of Pre- And Postimplant Artificial Heart Polyurethane Materials., Stephen Hunter, D Gregonis, D Colman, J Andrade, T Kessler
Stephen K. Hunter
No abstract provided.
Single Umbilical Artery: Does Side Matter?, Mark Santillan, Donna Santillan, D. Fleener, B. Stegmann, G. Zamba, Stephen Hunter, J. Yankowitz
Single Umbilical Artery: Does Side Matter?, Mark Santillan, Donna Santillan, D. Fleener, B. Stegmann, G. Zamba, Stephen Hunter, J. Yankowitz
Stephen K. Hunter
INTRODUCTION: The aim of this study was to determine if laterality of an absent umbilical artery (AUA) is associated with specific sonographic findings, chromosomal defects or postpartum birth defects. MATERIALS AND METHODS: In this retrospective cohort study, ultrasound reports and medical records of patients who received an obstetric ultrasound at the University of Iowa Hospitals and Clinics with an identified laterality of the AUA from 1989 to 2007 (n = 405) were reviewed. Rates of sonographic abnormalities between fetuses with a right versus left AUA were compared using Fisher's exact test. Adjustments for confounding were made using logistic regression modeling. …
The Gamete And Embryo Compatibility Of Various Synthetic Polymers., Stephen Hunter, J. Scott, D. Hull, R. Urry
The Gamete And Embryo Compatibility Of Various Synthetic Polymers., Stephen Hunter, J. Scott, D. Hull, R. Urry
Stephen K. Hunter
Several popular and well-characterized polymeric materials were evaluated for their biocompatibility toward the cells unique to reproduction. To accomplish these studies, several in vitro tests were developed that evaluated biocompatibility between the polymers and spermatozoa, ova, and embryos. The data indicated significant differences between the materials with respect to their biocompatibility toward sperm motility, the sperm's ability to penetrate zona-free hamster eggs, and the ability of two-cell mouse embryos to divide. Polytetrafluoroethylene (PTFE-Teflon; PTFE, Chemplast Inc., Wayne, NJ), polyethylene glycol (PEG), and polyhydroxyethyl methacrylate (PHEMA) appear to be the most inert of the materials studied. Polyvinyl chloride (PVC; Tygon-Norton, Akron, …
Surface Modification Of Polyurethane To Promote Long-Term Patency Of Peritoneal Access Devices., Stephen Hunter, D. Gregonis, D. Coleman, B. Hanover, R. Stephen, S. Jacobsen
Surface Modification Of Polyurethane To Promote Long-Term Patency Of Peritoneal Access Devices., Stephen Hunter, D. Gregonis, D. Coleman, B. Hanover, R. Stephen, S. Jacobsen
Stephen K. Hunter
No abstract provided.
Development And Characterization Of An Indoleamine 2,3-Dioxygenase (Ido) Deficient Mouse Model Of Preeclampsia, Mark Santillan, Christopher Pelham, Pimonrat Ketsawatsomkron, Donna Santillan, Baoli Yang, Stephen Hunter, Curt Sigmund
Development And Characterization Of An Indoleamine 2,3-Dioxygenase (Ido) Deficient Mouse Model Of Preeclampsia, Mark Santillan, Christopher Pelham, Pimonrat Ketsawatsomkron, Donna Santillan, Baoli Yang, Stephen Hunter, Curt Sigmund
Stephen K. Hunter
No abstract provided.
Cell Encapsulation As A Potential Nondietary Therapy For Maternal Phenylketonuria, Donna Santillan, Mark Santillan, Stephen Hunter
Cell Encapsulation As A Potential Nondietary Therapy For Maternal Phenylketonuria, Donna Santillan, Mark Santillan, Stephen Hunter
Stephen K. Hunter
OBJECTIVE: The objective of this work was to determine whether cells overexpressing phenylalanine (Phe) hydroxylase (PAH) can significantly reduce Phe in vitro for potential use as a therapy for preventing maternal phenylketonuria. STUDY DESIGN: Human 293T and WRL68 cell lines were transiently and stably transfected to overexpress PAH. Cells were encapsulated within microspheres of sodium alginate. Timed measurements of Phe in media were performed using tandem mass spectrometry. RESULTS: Both nonencapsulated and encapsulated transiently transfected cells overexpressing PAH significantly reduced the Phe concentration in media by approximately 50% in comparison to mock-transfected cells. Cell line clones stably expressing PAH significantly …
Gene Modification Via "Plug And Socket" Gene Targeting., J. Lewis, Baoli Yang, P. Detloff, O. Smithies
Gene Modification Via "Plug And Socket" Gene Targeting., J. Lewis, Baoli Yang, P. Detloff, O. Smithies
Baoli Yang
No abstract provided.
A Common Human Beta Globin Splicing Mutation Modeled In Mice., J. Lewis, Baoli Yang, R. Kim, H. Sierakowska, R. Kole, O. Smithies, N. Maeda
A Common Human Beta Globin Splicing Mutation Modeled In Mice., J. Lewis, Baoli Yang, R. Kim, H. Sierakowska, R. Kole, O. Smithies, N. Maeda
Baoli Yang
The betaIVS-2-654 C-->T mutation accounts for approximately 20% of beta thalassemia mutations in southern China; it causes aberrant RNA splicing and leads to beta0 thalassemia. To provide an animal model for testing therapies for correcting splicing defects, we have used the "plug and socket" method of gene targeting in murine embryonic stem cells to replace the two (cis) murine adult beta globin genes with a single copy of the human betaIVS-2-654 gene. No homozygous mice survive postnatally. Heterozygous mice carrying this mutant gene produce reduced amounts of the mouse beta globin chains and no human beta globin, and have …
T-Cell Specific Avian Tdt: Characterization Of The Cdna And Recombinant Enzyme., Baoli Yang, K. Gathy, M. Coleman
T-Cell Specific Avian Tdt: Characterization Of The Cdna And Recombinant Enzyme., Baoli Yang, K. Gathy, M. Coleman
Baoli Yang
A cDNA clone coding for avian terminal deoxynucleotidyl transferase (TdT) has been isolated and sequenced. The size of this cDNA was 2545 bp with an open reading frame of 1521 bp and a predicted translation product of 58 kDa. Comparison of this TdT sequence with other known TdT sequences has revealed a very high degree of homology at both the DNA and predicted amino acid levels. The chicken TdT cDNA was expressed in a bacterial system and the protein was purified by affinity chromatography. The purified recombinant enzyme, with a specific activity of approximately 1700 U/mg protein, was significantly less …
Fetal Hemorrhage And Platelet Dysfunction In Slp-76-Deficient Mice., J. Clements, J. Lee, B. Gross, Baoli Yang, J. Olson, A. Sandra, S. Watson, S. Lentz, G. Koretzky
Fetal Hemorrhage And Platelet Dysfunction In Slp-76-Deficient Mice., J. Clements, J. Lee, B. Gross, Baoli Yang, J. Olson, A. Sandra, S. Watson, S. Lentz, G. Koretzky
Baoli Yang
The adapter protein SLP-76 is expressed in T lymphocytes and hematopoietic cells of the myeloid lineage, and is known to be a substrate of the protein tyrosine kinases that are activated after ligation of the T-cell antigen receptor. Transient overexpression of SLP-76 in a T-cell line potentiates transcriptional activation after T-cell receptor ligation, while loss of SLP-76 expression abrogates several T-cell receptor-dependent signaling pathways. Mutant mice that lack SLP-76 manifest a severe block at an early stage of thymocyte development, implicating SLP-76 in signaling events that promote thymocyte maturation. While it is clear that SLP-76 plays a key role in …
Syntaxin 4 Heterozygous Knockout Mice Develop Muscle Insulin Resistance., C. Yang, K. Coker, J. Kim, S. Mora, D. Thurmond, A. Davis, Baoli Yang, R. Williamson, G. Shulman, J. Pessin
Syntaxin 4 Heterozygous Knockout Mice Develop Muscle Insulin Resistance., C. Yang, K. Coker, J. Kim, S. Mora, D. Thurmond, A. Davis, Baoli Yang, R. Williamson, G. Shulman, J. Pessin
Baoli Yang
To investigate the physiological function of syntaxin 4 in the regulation of GLUT4 vesicle trafficking, we used homologous recombination to generate syntaxin 4-knockout mice. Homozygotic disruption of the syntaxin 4 gene results in early embryonic lethality, whereas heterozygous knockout mice, Syn4(+/-), had normal viability with no significant impairment in growth, development, or reproduction. However, the Syn4(+/-) mice manifested impaired glucose tolerance with a 50% reduction in whole-body glucose uptake. This defect was attributed to a 50% reduction in skeletal muscle glucose transport determined by 2-deoxyglucose uptake during hyperinsulinemic-euglycemic clamp procedures. In parallel, insulin-stimulated GLUT4 translocation in skeletal muscle was also …
The Ubiquitin Ligase Adaptor Ndfip1 Regulates T Cell-Mediated Gastrointestinal Inflammation And Inflammatory Bowel Disease Susceptibility., H. Ramon, C. Riling, J. Bradfield, Baoli Yang, H. Hakonarson, P. Oliver
The Ubiquitin Ligase Adaptor Ndfip1 Regulates T Cell-Mediated Gastrointestinal Inflammation And Inflammatory Bowel Disease Susceptibility., H. Ramon, C. Riling, J. Bradfield, Baoli Yang, H. Hakonarson, P. Oliver
Baoli Yang
Nedd4 family interacting protein 1 (Ndfip1) is an adaptor protein that regulates Itch, an E3 ubiquitin ligase that ubiquitylates JunB, thereby preventing interleukin (IL)-4 and IL-5 production. Mice lacking Ndfip1 or Itch develop T helper type 2 (T(H)2)-mediated inflammation in the skin and lungs and die prematurely. In this study we show that Ndfip1-/- mice also develop inflammation in the gastrointestinal tract. Inflammation is characterized by infiltration of eosinophils and T cells and is accompanied by a failure to gain weight. T cells are both necessary and sufficient for eosinophil recruitment and inflammation. This is because Ndfip1-/- T cells become …
Disruption Of The Beta Subunit Of The Epithelial Na+ Channel In Mice: Hyperkalemia And Neonatal Death Associated With A Pseudohypoaldosteronism Phenotype., F. Mcdonald, Baoli Yang, R. Hrstka, H. Drummond, D. Tarr, P. Mccray, J. Stokes, M. Welsh, R. Williamson
Disruption Of The Beta Subunit Of The Epithelial Na+ Channel In Mice: Hyperkalemia And Neonatal Death Associated With A Pseudohypoaldosteronism Phenotype., F. Mcdonald, Baoli Yang, R. Hrstka, H. Drummond, D. Tarr, P. Mccray, J. Stokes, M. Welsh, R. Williamson
Baoli Yang
The epithelial Na+ channel (ENaC) is composed of three homologous subunits: alpha, beta and gamma. We used gene targeting to disrupt the beta subunit gene of ENaC in mice. The betaENaC-deficient mice showed normal prenatal development but died within 2 days after birth, most likely of hyperkalemia. In the -/- mice, we found an increased urine Na+ concentration despite hyponatremia and a decreased urine K+ concentration despite hyperkalemia. Moreover, serum aldosterone levels were increased. In contrast to alphaENaC-deficient mice, which die because of defective lung liquid clearance, neonatal betaENaC deficient mice did not die of respiratory failure and showed only …
A Mouse Model For Beta 0-Thalassemia., Baoli Yang, S. Kirby, J. Lewis, P. Detloff, N. Maeda, O. Smithies
A Mouse Model For Beta 0-Thalassemia., Baoli Yang, S. Kirby, J. Lewis, P. Detloff, N. Maeda, O. Smithies
Baoli Yang
We have used a "plug and socket" targeting technique to generate a mouse model of beta 0-thalassemia in which both the b1 and b2 adult globin genes have been deleted. Mice homozygous for this deletion (Hbbth-3/Hbbth-3) die perinatally, similar to the most severe form of Cooley anemia in humans. Mice heterozygous for the deletion appear normal, but their hematologic indices show characteristics typical of severe thalassemia, including dramatically decreased hematocrit, hemoglobin, red blood cell counts, mean corpuscular volume, mean corpuscular hemoglobin, and mean corpuscular hemoglobin concentration, as well as dramatically increased reticulocyte counts, serum bilirubin concentrations, and red cell distribution …
Appropriate Tissue- And Cell-Specific Expression Of A Single Copy Human Angiotensinogen Transgene Specifically Targeted Upstream Of The Hprt Locus By Homologous Recombination., B. Cvetkovic, Baoli Yang, R. Williamson, C. Sigmund
Appropriate Tissue- And Cell-Specific Expression Of A Single Copy Human Angiotensinogen Transgene Specifically Targeted Upstream Of The Hprt Locus By Homologous Recombination., B. Cvetkovic, Baoli Yang, R. Williamson, C. Sigmund
Baoli Yang
Development of experimental models by genetic manipulation in mice has proven to be very useful in determining the significance of particular genes in the development of or susceptibility to hypertension. Advances in molecular genetics, transgenic mouse technology, and physiological measurements in mice provided an opportunity to go a step further and develop models to analyze the physiological significance of specific gene variants potentially causing hypertension. In this report, we describe the development of a human angiotensinogen transgenic mouse model generated by targeting the human angiotensinogen gene upstream of the mouse HPRT locus by homologous recombination. The main benefit of this …
Requirement For The Leukocyte-Specific Adapter Protein Slp-76 For Normal T Cell Development., J. Clements, Baoli Yang, S. Ross-Barta, S. Eliason, R. Hrstka, R. Williamson, G. Koretzky
Requirement For The Leukocyte-Specific Adapter Protein Slp-76 For Normal T Cell Development., J. Clements, Baoli Yang, S. Ross-Barta, S. Eliason, R. Hrstka, R. Williamson, G. Koretzky
Baoli Yang
The leukocyte-specific adapter molecule SLP-76 (Src homology 2 domain-containing leukocyte protein of 76 kilodaltons) is rapidly phosphorylated on tyrosine residues after receptor ligation in several hematopoietically derived cell types. Mice made deficient for SLP-76 expression contained no peripheral T cells as a result of an early block in thymopoiesis. Macrophage and natural killer cell compartments were intact in SLP-76-deficient mice, despite SLP-76 expression in these lineages in wild-type mice. Thus, the SLP-76 adapter protein is required for normal thymocyte development and plays a crucial role in translating signals mediated by pre-T cell receptors into distal biochemical events.
The Effect Of Monoclonal Anti-Hcg Antibodies On The Bioactivity And The Binding With Receptor Of Hcg And Lh, Baoli Yang, F. Zhou, Y. Yang
The Effect Of Monoclonal Anti-Hcg Antibodies On The Bioactivity And The Binding With Receptor Of Hcg And Lh, Baoli Yang, F. Zhou, Y. Yang
Baoli Yang
No abstract provided.
The Mammalian Sodium Channel Bnc1 Is Required For Normal Touch Sensation., M. Price, G. Lewin, S. Mcilwrath, C. Cheng, J. Xie, P. Heppenstall, C. Stucky, A. Mannsfeldt, T. Brennan, H. Drummond, J Qiao, C. Benson, D Tarr, R Hrstka, Baoli Yang, R. Williamson, M. Welsh
The Mammalian Sodium Channel Bnc1 Is Required For Normal Touch Sensation., M. Price, G. Lewin, S. Mcilwrath, C. Cheng, J. Xie, P. Heppenstall, C. Stucky, A. Mannsfeldt, T. Brennan, H. Drummond, J Qiao, C. Benson, D Tarr, R Hrstka, Baoli Yang, R. Williamson, M. Welsh
Baoli Yang
Of the vertebrate senses, touch is the least understood at the molecular level The ion channels that form the core of the mechanosensory complex and confer touch sensitivity remain unknown. However, the similarity of the brain sodium channel 1 (BNC1) to nematode proteins involved in mechanotransduction indicated that it might be a part of such a mechanosensor. Here we show that disrupting the mouse BNC1 gene markedly reduces the sensitivity of a specific component of mechanosensation: low-threshold rapidly adapting mechanoreceptors. In rodent hairy skin these mechanoreceptors are excited by hair movement. Consistent with this function, we found BNC1 in the …
Nedd4 And Nedd4-2: Closely Related Ubiquitin-Protein Ligases With Distinct Physiological Functions., Baoli Yang, S. Kumar
Nedd4 And Nedd4-2: Closely Related Ubiquitin-Protein Ligases With Distinct Physiological Functions., Baoli Yang, S. Kumar
Baoli Yang
The Nedd4 (neural precursor cell-expressed developmentally downregulated gene 4) family of ubiquitin ligases (E3s) is characterized by a distinct modular domain architecture, with each member consisting of a C2 domain, 2-4 WW domains, and a HECT-type ligase domain. Of the nine mammalian members of this family, Nedd4 and its close relative, Nedd4-2, represent the ancestral ligases with strong similarity to the yeast, Rsp5. In Saccharomyces cerevisiae Rsp5 has a key role in regulating the trafficking, sorting, and degradation of a large number of proteins in multiple cellular compartments. However, in mammals the Nedd4 family members, including Nedd4 and Nedd4-2, appear …
Identification Of A Tripartite Basal Promoter Which Regulates Human Terminal Deoxynucleotidyl Transferase Gene Expression., D. Bhaumik, Baoli Yang, T. Trangas, J. Bartlett, M. Coleman, D. Sorscher
Identification Of A Tripartite Basal Promoter Which Regulates Human Terminal Deoxynucleotidyl Transferase Gene Expression., D. Bhaumik, Baoli Yang, T. Trangas, J. Bartlett, M. Coleman, D. Sorscher
Baoli Yang
In order to locate the promoter region of the human terminal deoxynucleotidyl transferase gene, serially truncated segments of the 5'-flanking region of the gene were cloned into a chloramphenicol acetyltransferase reporter vector. Transient transfection analyses of the terminal transferase-reporter gene constructs identified the basal promoter region within -34 to +40 base pairs relative to the transcription start site. Three promoter elements were defined in this region. The primary element is within 34 base pairs upstream of the transcription start site. The CAP site is 62 base pairs upstream of the translation start site. The secondary element involves sequences around the …