19 results on '"Mobolaji, Famuyide"'
Search Results
2. Apnea in Term and Late Preterm Neonates Born to Coronavirus Infected Mothers
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Jaimin Patel, Jagdish Desai, Renjithkumar Thekkeveedu, Tasha Coleman, Nilesh Dankhara, Alisia Hankins, and Mobolaji Famuyide
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Pediatrics ,medicine.medical_specialty ,Transplacental transmission ,Coronavirus disease 2019 (COVID-19) ,business.industry ,education ,Apnea ,medicine.disease_cause ,03 medical and health sciences ,0302 clinical medicine ,Publishing ,030225 pediatrics ,medicine ,Late preterm ,030212 general & internal medicine ,Neonatology ,medicine.symptom ,business ,Early discharge ,Coronavirus - Abstract
We report three otherwise healthy neonates born to Coronavirus Disease-19 (COVID-19) positive mothers who developed apnea during birth admission but tested negative for COVID-19 We postulate that the apnea may be due to transplacental transmission of inflammatory cytokines We strongly advise against early discharge in babies born to mothers with active COVID-19 infection [ABSTRACT FROM AUTHOR] Copyright of Neonatology Today is the property of Loma Linda Publishing Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission However, users may print, download, or email articles for individual use This abstract may be abridged No warranty is given about the accuracy of the copy Users should refer to the original published version of the material for the full abstract (Copyright applies to all Abstracts )
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- 2020
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3. Racial Disparities in Preemies and Pandemics
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Marin Arnolds, Dalia M. Feltman, Mobolaji Famuyide, and Rupali Gandhi
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medicine.medical_specialty ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,Pneumonia, Viral ,Betacoronavirus ,Pandemic ,medicine ,Humans ,Intensive care medicine ,Pandemics ,biology ,SARS-CoV-2 ,Viral Epidemiology ,business.industry ,Health Policy ,Racial Groups ,COVID-19 ,Infant ,medicine.disease ,biology.organism_classification ,Issues, ethics and legal aspects ,Pneumonia ,Coronavirus Infections ,business ,Healthcare system - Abstract
As COVID-19 related hospitalizations surged in other countries and began to rise sharply in the United States, hospitals, healthcare systems, and states began to grapple with the terrifying questio...
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- 2020
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4. Antenatal Periviability Counseling and Decision Making: A Retrospective Examination by the Investigating Neonatal Decisions for Extremely Early Deliveries Study Group
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Naomi Laventhal, Emily Batton, Mobolaji Famuyide, Christin Lawrence, Avisek Datta, Steven R. Leuthner, Christine Carlos, Drew Hayslett, Brownsyne Tucker Edmonds, Tiffany R. Tonismae, Meenu Jain, Tasha Coleman, Dalia M. Feltman, Bree Andrews, and Katie A. Fritz
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Counseling ,medicine.medical_specialty ,Resuscitation ,Birth weight ,Decision Making ,Mothers ,Prenatal care ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,Birth Weight ,Humans ,Medicine ,Neonatology ,Fetal Viability ,Resuscitation Orders ,Retrospective Studies ,Patient Care Team ,030219 obstetrics & reproductive medicine ,business.industry ,Medical record ,Racial Groups ,Infant, Newborn ,Obstetrics and Gynecology ,Prenatal Care ,Retrospective cohort study ,medicine.disease ,Premature birth ,Infant, Extremely Premature ,Family medicine ,Pediatrics, Perinatology and Child Health ,Premature Birth ,Female ,business ,Neonatal resuscitation - Abstract
Objective To describe periviability counseling practices and decision making. Study Design This is a retrospective review of mothers and newborns delivering between 22 and 24 completed weeks from 2011 to 2015 at six U.S. centers. Maternal and fetal/neonatal clinical and maternal sociodemographic data from medical records and geocoded sociodemographic information were collected. Separate analyses examined characteristics surrounding receiving neonatology consultation; planning neonatal resuscitation; and centers' planned resuscitation rates. Results Neonatology consultations were documented for 40, 63, and 72% of 498 mothers delivering at 22, 23, and 24 weeks, respectively. Consult versus no-consult mothers had longer median admission-to-delivery intervals (58.7 vs. 8.7 h, p Conclusion Areas requiring improvement included delivery/content of neonatology consultations, social work support, consideration of centers' patient populations, and opportunities for shared decisions.
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- 2019
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5. Aerosolized Calfactant for Newborns With Respiratory Distress: A Randomized Trial
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Aero Study Investigators, Jaime Flores-Torres, George Albert, Devon Kuehn, Anup Katheria, Scott O Guthrie, E Gerday, Stephen D. Minton, Prem Fort, Jonathan R. Swanson, Elie G. Abu Jawdeh, Rita M. Ryan, Praveen Kumar, Gregory C. Martin, Neil Mulrooney, Jörn-Hendrik Weitkamp, Edmund A. Egan, James J. Cummings, Greg Wilding, Mobolaji Famuyide, Dale R. Gerstmann, Andrea Lampland, and Fabien G. Eyal
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Male ,Calfactant ,Birth weight ,medicine.medical_treatment ,Administration, Oral ,Gestational Age ,law.invention ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Intensive Care Units, Neonatal ,030225 pediatrics ,Intubation, Intratracheal ,medicine ,Humans ,Intubation ,Prospective Studies ,Aerosolization ,Aerosols ,Biological Products ,Respiratory Distress Syndrome, Newborn ,Respiratory distress ,business.industry ,Nebulizers and Vaporizers ,Infant, Newborn ,Gestational age ,Pulmonary Surfactants ,Nebulizer ,Anesthesia ,Pediatrics, Perinatology and Child Health ,Female ,business ,medicine.drug - Abstract
BACKGROUND:Exogenous surfactants to treat respiratory distress syndrome (RDS) are approved for tracheal instillation only; this requires intubation, often followed by positive pressure ventilation to promote distribution. Aerosol delivery offers a safer alternative, but clinical studies have had mixed results. We hypothesized that efficient aerosolization of a surfactant with low viscosity, early in the course of RDS, could reduce the need for intubation and instillation of liquid surfactant.METHODS:A prospective, multicenter, randomized, unblinded comparison trial of aerosolized calfactant (Infasurf) in newborns with signs of RDS that required noninvasive respiratory support. Calfactant was aerosolized by using a Solarys nebulizer modified with a pacifier adapter; 6 mL/kg (210 mg phospholipid/kg body weight) were delivered directly into the mouth. Infants in the aerosol group received up to 3 treatments, at least 4 hours apart. Infants in the control group received usual care, determined by providers. Infants were intubated and given instilled surfactant for persistent or worsening respiratory distress, at their providers’ discretion.RESULTS:Among 22 NICUs, 457 infants were enrolled; gestation 23 to 41 (median 33) weeks and birth weight 595 to 4802 (median 1960) grams. In total, 230 infants were randomly assigned to aerosol; 225 received 334 treatments, starting at a median of 5 hours. The rates of intubation for surfactant instillation were 26% in the aerosol group and 50% in the usual care group (P < .0001). Respiratory outcomes up to 28 days of age were no different.CONCLUSIONS:In newborns with early, mild to moderate respiratory distress, aerosolized calfactant at a dose of 210 mg phospholipid/kg body weight reduced intubation and surfactant instillation by nearly one-half.
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- 2020
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6. Ethical Cultures in Perinatal Care: Do They Exist? Correlation of Provider Attitudes with Periviability Practices at Six Centers
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Naomi Laventhal, Steven R. Leuthner, Dalia M. Feltman, Tiffany R. Tonismae, Bree Andrews, Christine Carlos, Christin Lawrence, Drew Hayslett, Mobolaji Famuyide, Katie A. Fritz, Tasha Coleman, Meenu Jain, and Brownsyne Tucker Edmonds
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Adult ,Male ,medicine.medical_specialty ,Resuscitation ,Perinatal care ,Psychological intervention ,MEDLINE ,Correlation ,03 medical and health sciences ,0302 clinical medicine ,Neonatologists ,Pregnancy ,Medicine ,Humans ,Child ,Retrospective Studies ,030219 obstetrics & reproductive medicine ,business.industry ,Infant, Newborn ,Obstetrics and Gynecology ,Retrospective cohort study ,Odds ratio ,Confidence interval ,Perinatal Care ,Logistic Models ,Attitude ,Pediatrics, Perinatology and Child Health ,Emergency medicine ,Linear Models ,Quality of Life ,Female ,business - Abstract
Objective This study aimed to compare attitudes of providers regarding perinatal management and outcomes for periviable newborns of caregivers at centers with higher resuscitation (HR) and lower resuscitation (LR) rates in the delivery room. Study Design All obstetric and neonatal clinical providers at six U.S. sites were invited to complete an anonymous online survey. Survey responses were compared with clinical data collected from a previous retrospective study comparing centers' rates of planned resuscitation. Responses were analyzed by multivariable logistic and linear regression to assess how HR versus LR center respondents differed in management preferences and outcome predictions. Results Paradoxically, HR versus LR respondents, when adjusting for other variables, were less likely to respond that interventions such as antenatal steroids (odds ratio: 0.61, 95% confidence interval [CI]: 0.42–0.88, p Conclusion Despite higher rates of planned resuscitation at 22 and 23 weeks, steroid usage and survival rates did not differ between HR and LR sites. In this subsequent survey, respondents from HR centers had a less favorable outlook on interventions for these newborns than those at LR centers, suggesting that instead of driving practices, attitudes may be more closely associated with experiences of clinical outcomes.
- Published
- 2020
7. Intention to treat: obstetrical management at the threshold of viability
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Tasha Coleman, Brownsyne Tucker Edmonds, Dalia M. Feltman, Bree Andrews, Surya Sruthi Bhamidipalli, Steven R. Leuthner, Christin Lawrence, Tiffany R. Tonismae, Naomi Laventhal, Drew Hayslett, Christine Carlos, Mobolaji Famuyide, Katie A. Fritz, and William F. Fadel
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Resuscitation ,Pregnancy ,medicine.medical_specialty ,Neonatal intensive care unit ,Intention-to-treat analysis ,business.industry ,Obstetrics ,Cesarean Section ,Infant, Newborn ,Obstetrics and Gynecology ,Gestational age ,Retrospective cohort study ,General Medicine ,medicine.disease ,Intention to Treat Analysis ,medicine ,Gestation ,Humans ,Premature Birth ,Female ,business ,Neonatal resuscitation ,Retrospective Studies - Abstract
Despite medical advances in the care of extremely preterm neonates and growing acceptance of resuscitation at 23 and even 22 weeks gestation, controversy remains concerning the use of antepartum obstetric intervention s that are intended to improve outcomes in the setting of anticipated extremely preterm birth. In the absence of demonstrated benefit at23 weeks gestation and with uncertain benefit at 23 weeks gestation, previous obstetric committee opinions have advised against their use at these gestational ages.The purpose of this study was to review the use of obstetric intervention s at the threshold of viability based on neonatal resuscitation plan and to review the odds of survival to neonatal intensive care unit discharge based on use of obstetric intervention s with adjustment for neonatal factors.This retrospective study of 6 study centers reviewed pregnant patients who were admitted between 22+0/7 and 24+6/7 weeks gestation facing delivery from 2011-2015. Patients with known anomalies or missing data were excluded. Records were reviewed for demographics, resuscitation plan, and obstetric intervention s. Mode of delivery, delivery room care, and final infant dispositions were recorded. Multiple gestations were included as 1 pregnancy in regard to the use of obstetric intervention s and were excluded from survival analysis.Four hundred seventy-eight mothers met the inclusion criteria. When resuscitation was planned, mothers were more likely to receive all conventional obstetric intervention s (antenatal steroids, magnesium sulfate for neuroprotection, tocolytics, and Group Beta Streptococcus prophylaxis), regardless of gestational age at admission, and were more likely to be delivered by cesarean section (P.05). Analyzed as a group, when antenatal steroids, magnesium sulfate, tocolytics and Group Beta Streptococcus prophylaxis were administered, the odds of survival to neonatal intensive care unit discharge increased for newborn infants who were born at 22 (odds ratio, 11.33; 95% confidence interval, 1.405-91.4) and 23 weeks gestation (odds ratio, 15.5; 95% confidence interval, 3.747-64.11; P.05). In singletons, the odds of survival to neonatal intensive care unit discharge was not improved by cesarean delivery vs vaginal delivery, even after adjustment for the use of additional interventions, weight, gender, and gestational age (odds ratio, 1.0; 95% confidence interval, 0.59-1.8; P=.912).In this study, when postnatal resuscitation was planned at 22 and 23 weeks gestation, women were more likely to receive antenatal steroids, magnesium sulfate, and antibiotics; provision of this bundle imparted survival benefit at 23 weeks gestation but could not be demonstrated at 22 weeks gestation because of the small sample size. These findings support of neonate-oriented obstetric interventions in the setting of delivery at 23 weeks gestation when resuscitation is planned and further exploration of optimal obstetric care when resuscitation of infants who were born at 22 weeks gestation is anticipated.
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- 2019
8. Improving Staff Knowledge and Attitudes Toward Providing Psychosocial Support to NICU Parents Through an Online Education Course
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Keira L. Sorrells, Tiffany A. Moore, Sage N. Saxton, Jenene W. Craig, Sara Mosher, Mobolaji Famuyide, Cheryl A. Milford, and Sue Hall
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Parents ,Health Knowledge, Attitudes, Practice ,Neonatal intensive care unit ,psychosocial support ,Attitude of Health Personnel ,health care facilities, manpower, and services ,education ,online learning ,MEDLINE ,maternal mental health ,Education, Distance ,Nursing ,Intensive care ,Intensive Care Units, Neonatal ,Neonatal Nursing ,Surveys and Questionnaires ,Medicine ,Humans ,staff education ,parent support ,Emotional Intelligence ,Social work ,business.industry ,Emotional intelligence ,Psychosocial Support Systems ,General Medicine ,Psychosocial support ,neonatal intensive care unit ,Work experience ,Pediatrics, Perinatology and Child Health ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,Intensive Care, Neonatal ,Educational Status ,business ,Professional Growth and Development ,Parent satisfaction - Abstract
Supplemental Digital Content is Available in the Text., Background: Provider–parent communication is a critical determinant of how neonatal intensive care unit (NICU) parents cope, yet staff feel inadequately trained in communication techniques; many parents are not satisfied with the support they receive from hospital providers. Purpose: This study evaluated whether NICU staff would demonstrate improved knowledge and attitudes about providing psychosocial support to parents after taking an online course. Methods: After providing demographic information, staff at 2 NICUs took a 33-item survey both before and after taking a 7-module online course “Caring for Babies and Their Families,” and again at 6-month follow-up. Scores (means ± standard deviation) from all time periods were compared and effect sizes calculated for each of the course modules. Results: NICU staff participants (n = 114) included nurses (88%), social workers (7%), physicians (4%), and occupational therapists (1%). NICU staff showed significant improvement in both knowledge and attitudes in all modules after taking the course, and improvements in all module subscores remained significant at the 6-month follow-up mark. Night staff and staff with less experience had lower pretest scores on several items, which improved on posttest. Implications for Practice: This course, developed by an interprofessional group that included graduate NICU parents, was highly effective in improving staff knowledge and attitudes regarding the provision of psychosocial support to NICU parents, and in eliminating differences related to shift worked and duration of work experience in the NICU. Implications for Research: Future research should evaluate course efficacy across NICU disciplines beyond nursing, impact on staff performance, and whether parent satisfaction with care is improved.
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- 2019
9. Outcome Associations of Invasive Intervention of PDA - A National Perspective from Multicenter KIDS Database
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Jaimin M. Patel, Mobolaji Famuyide, Savich, Renate D., Bhatt, Abhay J., and Desai, Jagdish
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- 2019
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10. Neonatal nurse practitioner ethics knowledge and attitudes
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Melanie Ellis, Caroline Compretta, and Mobolaji Famuyide
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Adult ,Male ,Health Knowledge, Attitudes, Practice ,Neonatal intensive care unit ,Nurse practitioners ,Parental permission ,education ,Neonatal Nurse Practitioner ,0603 philosophy, ethics and religion ,03 medical and health sciences ,Mississippi ,Nursing ,Informed consent ,Surveys and Questionnaires ,Ethics, Nursing ,Medicine ,Humans ,Nurse Practitioners ,Ethics Consultation ,Informed Consent ,Nurses, Neonatal ,030504 nursing ,Ethical issues ,business.industry ,06 humanities and the arts ,Issues, ethics and legal aspects ,Female ,060301 applied ethics ,0305 other medical science ,business - Abstract
Background: Neonatal nurse practitioners have become the frontline staff exposed to a myriad of ethical issues that arise in the day-to-day environment of the neonatal intensive care unit. However, ethics competency at the time of graduation and after years of practice has not been described. Research aim: To examine the ethics knowledge base of neonatal nurse practitioners as this knowledge relates to decision making in the neonatal intensive care unit and to determine whether this knowledge is reflected in attitudes toward ethical dilemmas in the neonatal intensive care unit. Research design: This was a prospective cohort study that examined decision making at the threshold of viability, life-sustaining therapies for sick neonates, and a ranking of the five most impactful ethical issues. Participants and research context: All 47 neonatal nurse practitioners who had an active license in the State of Mississippi were contacted via e-mail. Surveys were completed online using Survey Monkey software. Ethical considerations: The study was approved by the University of Mississippi Medical Center Institutional Review Board (IRB; #2015-0189). Findings: Of the neonatal nurse practitioners who completed the survey, 87.5% stated that their religious practices affected their ethical decision making and 76% felt that decisions regarding life-sustaining treatment for a neonate should not involve consultation with the hospital’s legal team or risk management. Only 11% indicated that the consent process involved patient understanding of possible procedures. Participating in the continuation or escalation of care for infants at the threshold of viability was the top ethical issue encountered by neonatal nurse practitioners. Discussion: Our findings reflect deficiencies in the neonatal nurse practitioner knowledge base concerning ethical decision making, informed consent/permission, and the continuation/escalation of care. Conclusion: In addition to continuing education highlighting ethics concepts, exploring the influence of religion in making decisions and knowing the most prominent dilemmas faced by neonatal nurse practitioners in the neonatal intensive care unit may lead to insights into potential solutions.
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- 2018
11. Preterm Clinical Co morbidity Index: A Novel Scoring System and Modeling for Predicting Length of Stay among Preterm Infants during Birth Hospitalization
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Jagdish Desai, Abhay Bhatt, Jaimin Patel, Renjith kumar Kalikkot, Simon Karam, Marla Johnson, Prashant Agarwal, Renate Savich, and Mobolaji Famuyide
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Pediatrics, Perinatology and Child Health - Published
- 2019
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12. Consultative Service Utilization Around Periviable Deliveries
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Mobolaji Famuyide, Andrew Hayslett, Jagdish Desai, Mary Beth Littrell, Tasha Coleman, Thomas Ferguson, Katie Fritz, Steven Leuthner, Christine Carlos, Emily Batton, Bree Andrews, Christin Lawrence, Naomi Laventhal, Tiffany Tonismae, Meenu Jain, and Dalia Feltman
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Pediatrics, Perinatology and Child Health - Published
- 2019
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13. Improving Staff Knowledge and Attitudes Toward Provision of Psychosocial Support to NICU Parents Through an Online Education Course
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Sage N. Saxton, Tiffany A. Moore, Mobolaji Famuyide, Sara Mosher, Keira L. Sorrells, and Sue Hall
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Medical education ,Maternity and Midwifery ,Continuing education ,Critical Care Nursing ,Psychology ,Pediatrics ,Psychosocial support ,Course (navigation) - Published
- 2019
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14. Dexamethasone induces apoptosis of progenitor cells in the subventricular zone and dentate gyrus of developing rat brain
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Jun Ming Wang, Kelly Hersey, Abhay J. Bhatt, Mobolaji Famuyide, and Yangzheng Feng
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medicine.medical_specialty ,Cerebellum ,Dentate gyrus ,Neurodegeneration ,Hippocampus ,Subventricular zone ,Biology ,medicine.disease ,Cellular and Molecular Neuroscience ,Endocrinology ,medicine.anatomical_structure ,Apoptosis ,Internal medicine ,medicine ,Progenitor cell ,Dexamethasone ,medicine.drug - Abstract
The use of dexamethasone in premature infants to prevent and/or treat bronchopulmonary dysplasia adversely affects neurocognitive development and is associated with cerebral palsy. The underlying mechanisms of these effects are multifactorial and likely include apoptosis. The objective of this study was to confirm whether dexamethasone causes apoptosis in different regions of the developing rat brain. On postnatal day 2, pups in each litter were randomly divided into the dexamethasone-treated (n = 91) or vehicle-treated (n = 92) groups. Rat pups in the dexamethasone group received tapering doses of dexamethasone on postnatal days 3–6 (0.5, 0.25, 0.125, and 0.06 mg/kg/day, respectively). Dexamethasone treatment significantly decreased the gain of body and brain weight and increased brain caspase-3 activity, DNA fragments, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling, and cleaved caspse-3-positive cells at 24 hr after treatment. Dexamethasone increased cleaved caspse-3-positive cells in the cortex, thalamus, hippocampus, cerebellum, dentate gyrus, and subventricular zone. Double-immunofluorescence studies show that progenitor cells in the subventricular zone and dentate gyrus preferentially undergo apoptosis following dexamethasone exposure. These results indicate that dexamethasone-induced apoptosis in immature cells in developing brain is one of the mechanisms of its neurodegenerative effects in newborn rats. © 2013 Wiley Periodicals, Inc.
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- 2013
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15. Surfactant Protein-A Limits Ureaplasma-Mediated Lung Inflammation in a Murine Pneumonia Model
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Ju-Ren He, Heather C. Carter, Kirsty L. Chesko, Mobolaji Famuyide, Jeffrey D. Hasday, and Rose M. Viscardi
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Mycoplasmataceae ,Inflammation ,Nitric Oxide ,urologic and male genital diseases ,Ureaplasma ,Article ,Mice ,medicine ,Animals ,Humans ,Lung ,Pulmonary Surfactant-Associated Protein A ,Mice, Knockout ,biology ,Respiratory disease ,Infant, Newborn ,Pneumonia ,respiratory system ,bacterial infections and mycoses ,medicine.disease ,biology.organism_classification ,female genital diseases and pregnancy complications ,respiratory tract diseases ,Surfactant protein A ,medicine.anatomical_structure ,Pediatrics, Perinatology and Child Health ,Immunology ,Cytokines ,medicine.symptom ,Bronchoalveolar Lavage Fluid - Abstract
Ureaplasma respiratory tract colonization stimulates prolonged, dysregulated inflammation in the lungs of preterm infants, contributing to bronchopulmonary dysplasia (BPD) pathogenesis. Surfactant protein-A (SP-A), a lung collectin critical for bacterial clearance and regulating inflammation, is deficient in the preterm lung. To analyze the role of SP-A in modulating Ureaplasma-mediated lung inflammation, SP-A deficient (SP-A-/-) and WT mice were inoculated intratracheally with a mouse-adapted U. parvum isolate and indices of inflammation were sequentially assessed up to 28 d postinoculation. Compared with infected WT and noninfected controls, Ureaplasma-infected SP-A-/- mice exhibited an exaggerated inflammatory response evidenced by rapid influx of neutrophils and macrophages into the lung, and higher bronchoalveolar lavage TNF-alpha, mouse analogue of human growth-related protein alpha (KC), and monocyte chemotactic factor (MCP-1) concentrations. However, nitrite generation in response to Ureaplasma infection was blunted at 24 h and Ureaplasma clearance was delayed in SP-A-/- mice compared with WT mice. Coadministration of human SP-A with the Ureaplasma inoculum to SP-A-/- mice reduced the inflammatory response, but did not improve the bacterial clearance rate. SP-A deficiency may contribute to the prolonged inflammatory response in the Ureaplasma-infected preterm lung, but other factors may contribute to the impaired Ureaplasma clearance.
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- 2009
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16. Developmental Interventions in the NICU
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Brenda Hussey-Gardner and Mobolaji Famuyide
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medicine.medical_specialty ,Massage ,business.industry ,Photic Stimulation ,Pediatrics, Perinatology and Child Health ,Psychological intervention ,Physical therapy ,Medicine ,Stimulation ,Intervention group ,business - Abstract
Both the rates of prematurity and survival of preterm infants have increased in the United States over the past 10 years. Preterm infants are at great risk for medical complications and future developmental disabilities. This article reviews the developmental outcomes of studies implementing developmental interventions in the NICU. Interventions include the newborn individualized care and assessment program, massage, oral-motor stimulation, positioning, skin-to-skin care, music, visual stimuli, light, and multimodal stimulation. Results of eight blinded, randomized, controlled trials included in this review demonstrate an effect that consistently favors the intervention group.
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- 2009
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17. Dexamethasone decreases insulin-like growth factor-I and -II via a glucocorticoid receptor dependent mechanism in developing rat brain
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Yangzheng, Feng, Mobolaji, Famuyide, and Abhay J, Bhatt
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Brain-Derived Neurotrophic Factor ,Brain ,Neurodegenerative Diseases ,Organ Size ,Dexamethasone ,Rats ,Rats, Sprague-Dawley ,Disease Models, Animal ,Mifepristone ,Hormone Antagonists ,Receptors, Glucocorticoid ,Animals, Newborn ,Insulin-Like Growth Factor II ,Pregnancy ,Nerve Growth Factor ,Animals ,Drug Interactions ,Female ,Insulin-Like Growth Factor I ,Glucocorticoids - Abstract
Dexamethasone (Dex) causes neurodegeneration in developing brain. Insulin-like growth factor-I (IGF-I) and -II (IGF-II) are potent neurotrophic and differentiation factors and play key roles in the regulation of growth and development of CNS. Current project evaluated the effects of Dex on IGF-I and -II in developing rat brains.Sprague-Dawley rat pups in each litter were divided into vehicle (n=230) or Dex-treated (n=234) groups. Rat pups in the Dex group received one of the 3 different regimens of i.p. Dex: tapering doses (DexTD) on postnatal days (PD) 3 to PD 6 or repeated doses on PD 4 to PD 6 or single dose on PD 6. To quantify the glucocorticoid receptor (GR) blockade effect, rat pups in the DexTD group on PD 3 and 5 received vehicle or RU486 (GR blocker, 60 mg/kg) s.c., twenty minutes prior to Dex treatment.Dex decreased the gain of body and brain weight while RU486 inhibited these effects. RU486 also prevented the DexTD-induced increase in caspase-3 activity and reduction in IGF-I and -II proteins. Compared to the vehicle, the expression of mRNA of IGF-I and -II decreased at 24 h after DexTD treatment, while RU486 prevented this decrease on IGF-II but not IGF-I.Our findings indicate that Dex via GR decreases IGF-I and -II and causes neurodegeneration in the neonatal rat brain.
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- 2013
18. Dexamethasone induces apoptosis of progenitor cells in the subventricular zone and dentate gyrus of developing rat brain
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Abhay J, Bhatt, Yangzheng, Feng, Junming, Wang, Mobolaji, Famuyide, and Kelly, Hersey
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Male ,Analysis of Variance ,Caspase 3 ,Multipotent Stem Cells ,Body Weight ,Age Factors ,Anti-Inflammatory Agents ,Apoptosis ,Cell Count ,Neural Cell Adhesion Molecule L1 ,DNA Fragmentation ,Organ Size ,Dexamethasone ,Cerebral Ventricles ,Rats ,Rats, Sprague-Dawley ,Animals, Newborn ,Pregnancy ,Dentate Gyrus ,Glial Fibrillary Acidic Protein ,In Situ Nick-End Labeling ,Sialic Acids ,Animals ,Female - Abstract
The use of dexamethasone in premature infants to prevent and/or treat bronchopulmonary dysplasia adversely affects neurocognitive development and is associated with cerebral palsy. The underlying mechanisms of these effects are multifactorial and likely include apoptosis. The objective of this study was to confirm whether dexamethasone causes apoptosis in different regions of the developing rat brain. On postnatal day 2, pups in each litter were randomly divided into the dexamethasone-treated (n = 91) or vehicle-treated (n = 92) groups. Rat pups in the dexamethasone group received tapering doses of dexamethasone on postnatal days 3-6 (0.5, 0.25, 0.125, and 0.06 mg/kg/day, respectively). Dexamethasone treatment significantly decreased the gain of body and brain weight and increased brain caspase-3 activity, DNA fragments, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling, and cleaved caspse-3-positive cells at 24 hr after treatment. Dexamethasone increased cleaved caspse-3-positive cells in the cortex, thalamus, hippocampus, cerebellum, dentate gyrus, and subventricular zone. Double-immunofluorescence studies show that progenitor cells in the subventricular zone and dentate gyrus preferentially undergo apoptosis following dexamethasone exposure. These results indicate that dexamethasone-induced apoptosis in immature cells in developing brain is one of the mechanisms of its neurodegenerative effects in newborn rats.
- Published
- 2012
19. Surfactant protein-A enhances ureaplasmacidal activity in vitro
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Adora C. Okogbule-Wonodi, Kirsty L. Chesko, Mobolaji Famuyide, and Rose M. Viscardi
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Cytotoxicity, Immunologic ,Phagocytosis ,Immunology ,Collectin ,Biology ,medicine.disease_cause ,Microbiology ,Ureaplasma ,Cell Line ,Mice ,medicine ,Animals ,Humans ,Molecular Biology ,Lung ,Pulmonary Surfactant-Associated Protein A ,Tumor Necrosis Factor-alpha ,Macrophages ,Ureaplasma Infections ,Infant, Newborn ,Cell Biology ,biology.organism_classification ,medicine.disease ,Surfactant protein A ,Infectious Diseases ,Ureaplasma parvum ,medicine.anatomical_structure ,Bronchopulmonary dysplasia ,Ureaplasma urealyticum - Abstract
Background: Persistent respiratory tract colonization with Ureaplasma spp. in preterm infants is a significant risk factor for the development of the chronic lung disorder, bronchopulmonary dysplasia (BPD). Surfactant protein-A (SP-A), a lung collectin critical for bacterial clearance and regulating inflammation, is deficient in the preterm lung. In an experimental Ureaplasma-pneumonia model, infected SP-A deficient mice exhibited delayed bacterial clearance and an exaggerated inflammatory response compared to infected wild-type mice. The objective was to analyze the role of SP-A in Ureaplasma clearance in vitro. Subjects and Methods: We analyzed SP-A binding to Ureaplasma isolates and SP-A-mediated ureaplasmal phagocytosis and killing by cultured RAW 264.7 macrophages. Results: Calcium-dependent SP-A binding was similar among Ureaplasma isolates tested. Pre-incubation of RAW 264.7 cells with SP-A (10-50 μg/ml) enhanced phagocytosis of fluorescein-isothiocyanate (FITC)-labeled Ureaplasma. Surfactant protein-A also increased ureaplasmacidal activity of RAW 264.7 cells by 2.1-fold over 4 h. Pre-incubation of RAW 264.7 cells with 10 μg/ml SP-A reduced lipopolysaccharide (LPS) (100 ng/ml) and Ureaplasma (106 color changing units/ml)-stimulated release of tumor necrosis factor-α (TNF-α) by 46% and 43%, respectively, but did not affect transforming growth factor β1 (TGFβ1) release. Conclusions: These in vitro data confirm that SP-A is important in host defense to perinatally-acquired Ureaplasma infection.
- Published
- 2010
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