Characterization of chorioamnionitis in second trimester C-section placentas and correlation with microorganism recovery from subamniotic tissues
Jonathan L Hecht, Andrew Onderdonk, Mary Delaney, Elizabeth N Allred, Harvey J Kliman, Eduardo Zambrano, Solveig M Pflueger, Chad A Livasy, Ina Bhan, Alan Leviton, ELGAN Study Investigators
Pediatr Dev Pathol 2008;11:15-22
Subamniotic parenchyma of 835 placentas delivered by c/s cultured and evaluated in blinded fashion. Microbes recovered from 41% of placentas. Microbes found more frequently in placentas with high-grade chorionic plate inflammation: Actinomyces, Prevotella bivia, Corynebacterium sp., Escherichia coli, Peptostreptococcus magnus, multiple species of Streptococci, and Mycoplasma sp., including Ureaplasma urealyticum. These microorganisms were also associated with fetal vasculitis.
Observer variability assessing US scans of the preterm brain: The ELGAN Study
Karl Kuban, Ira Adler, Elizabeth N Allred, Daniel Batton, Steven Bezinque, Bradford W Betz, Ellen Cavenagh, Sara Durfee, Kirsten Ecklund, Kate Feinstein, Lynn Ansley Fordham, Frederick Hampf, Joseph Junewick, Robert Lorenzo, Roy McCauley, Cindy Miller, Joanna Seibert, Barbara Specter, Jacqueline Wellman, Sjirk Westra, Alan Leviton
Pediatric Radiology 2007;37:1201-8.
We sought to evaluate observer variability among experienced neurosonologists. We collected all protocol US scans of 1,450 infants born before the 28th postmenstrual week. Each set of scans read by 2 sonologists for presence of IVH and mod/sev vmeg, & EL &EG: in WM. Scans read discordantly sent to a tie-breaking third sonologist.
Vmeg, EL and IVH had similar rates of positive agreement (68-76%), negative agreement (92-97%), and kappa values (0.62 to 0.68). EG had lower values of positive agreement (48%), negative agreement (84%), and kappa (0.32).
Perturbation of gene expression of the chromatin remodeling pathway in premature newborns at risk for BPD
Jennifer Cohen, Linda J Van Marter, Yao Sun, Elizabeth Allred, Alan Leviton, Isaac S Kohane
Genome Biol 2007;8:R210
To evaluate expression profiling in umbilical cord tissue to discover molecular signatures for staging and determine risk for BPD, we conducted cross-sectional study of ELGANs (n = 54). Sections of umb cord obtained at birth f/ 20 infants w/BPD & 34 peers who did not. Infants who developed BPD had distinct signatures involving chromatin remodeling and histone acetylation pathways, implicated in adult lung ds.
Reference weights for placentas delivered before the 28th week of gestation
J L Hecht, H J Kliman, E N Allred, S M Pflueger, C-H Chang, B J Doss, D Roberts, C A Livasy, I Bhan, E Zambrano, D W Ross, P Senagore, A N Husain, A Leviton
We measured the weight of 930 singleton placentas delivered < 28th week, and examined distributions of wts. We excluded 90 IUGR, resulting in normative sample of 840 placentas. Placenta weight varied with B Wt. Placentas from pregnancies ending due to preeclampsia, fetal indications or with poor perfusion on histology were among smallest and weights correlated with the smallest birth weights for gestational age.
Factors associated with tx for hypotension in extremely low gestational age newborns during the first postnatal week
Matthew Laughon, Carl Bose, Elizabeth Allred, T Michael O'Shea, Linda J Van Marter, Francis Bednarek, Alan Leviton, ELGAN Study Investigators
The goals to ID the BP of ELGANs that prompt intervention & to ID other infant characteristics of BP therapies. At each GA, the lowest MAP in treated and untreated infants tended to increase with advancing postnatal age. The proportion of infants receiving any tx decreased with increasing GA from 93% at 23 wks to 73% at 27 wks. Lower GA lower B Wt ,male sex, and higher SNAP-II values associated with tx.
Thymus involution and cerebral white matter damage in extremely low gestational age neonates
Joshua David Kuban, Elizabeth N Allred, Alan Leviton
Biol Neonate 2006;90:252-7
Among newborns who die, those who have cerebral white matter damage are more likely than others to have thymus involution and low thymus weights. We sought to evaluate in a population of preterm newborns who did not die if those who developed a cerebral white matter damage (defined by echolucency) are more likely than others to have thymus involution assessed on chest radiographs. Infants with an EL were more likely to have had early involution than infants without an EL (89% vs. 44%) (p = 0.01).
Video and CD-ROM as a training tool for performing neurologic examinations of 1-year-old children in a multicenter epidemiologic study
Karl C K Kuban, Michael O'Shea, Elizabeth Allred, Alan Leviton, Herbert Gilmore, Adré DuPlessis, Kalpathy Krishnamoorthy, Cecil Hahn, Janet Soul, Sunila E O'Connor, Karen Miller, Paige T Church, Cecilia Keller, Richard Bream, Robin Adair, Alice Miller, Elaine Romano, Haim Bassan, Kathy Kerkering, Steve Engelke, Diane Marshall, Kristy Milowic, Janice Wereszczak, Carol Hubbard, Lisa Washburn, Robert Dillard, Cherrie Heller, Wendy Burdo-Hartman, Lynn Fagerman, Dinah Sutton, Padu Karna, Nick Olomu, Leslie Caldarelli, Melisa Oca, Kim Lohr, Albert Scheiner
J. Child Neurol 2005;20:829-31
In lieu of traditional training of examiners to identify cerebral palsy on a neurologic examination at age 1 year, we proposed an alternative approach using multimedia training video. Interactive CD-ROM examination training is an efficient and cost-effective means of training both neurologists and non-neurologists to perform structured neurologic examinations in 1-year-old children.