Microfluidic Assessment of Clinical Outcomes in Preterm Newborns
Study Details
Study Description
Brief Summary
Sepsis has its greatest impact in the prematurely born (preterm) population. Neonatal sepsis (sepsis within the first month of life) causes over one million deaths worldwide annually, and is one of the most common, difficult and costly problems to diagnose, treat and prevent. The preterm infant can suffer rates of sepsis up to 1000-fold higher than the full-term infant, and bears the brunt of the associated mortality and lifelong sepsis-survivor morbidity.
The project is enabled by several novel, validated, microfluidic technologies that are robust and easy to use with little training. These technologies provide comprehensive measures of the functionality of blood PMN population; a critical cellular component of innate immunity. The study team will also extract high-quality nucleic acids from microfluidic-sorted PMNs for transcriptomic analyses. Collectively, these techniques require a total of 250 microliters (µL) of blood, which makes them particularly useful for preterm infants where sample volume is limited, and facilitates serial assessments with unprecedented temporal resolution of key functions of PMNs.
These studies, integrated with bioinformatics approaches, will generate new tools for diagnosing sepsis in the newborn and predicting clinical outcomes. Such approaches have the capability to dramatically change the clinical management of the preterm infant, and potentially improve long-term outcomes while reducing hospital costs.
Condition or Disease | Intervention/Treatment | Phase |
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Detailed Description
Blood samples will be collected from two populations: preterm infants and term infants.
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Preterm neonates (<32 weeks) the study team will collect a baseline 250 µl blood sample on day four of life and then approximately every three days, as is possible, until twenty-one days of life. In addition, for preterm neonates who have suspected sepsis, an additional 250 µl blood sample will be obtained on the day of suspected sepsis. After day twenty-one of life, 250 µl blood will be sampled one time per week until discharge, when a final 250 µl blood sample will be collected. The amount drawn for study related blood collections will not exceed the lesser of 50 ml or 3.0 ml/kg in an 8-week period.
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Term neonates (>36 weeks) the study team will be collect a single 250 µl blood sample with the routine screen for metabolic disorders when they are >24 hours old. This will be the only study related blood collection for term neonates.
For all infants, term and preterm, the following data will be collected while the neonate is hospitalized: Demographic information (age, date of birth), past and present medical records, laboratory, microbiology, and all other test results, X-ray, CT, MRI, US and all other imaging test results, records about any medication received during admission, records of physical exam during admission, records of all vital signs and hemodynamic monitoring during admission, records of any procedure or intervention during admission, and condition at the discharge and discharge location.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Preterm Neonates Blood collection Preterm. From blood, the speed, directionality, and persistence of PMN chemotaxis using microfluidic devices and transcriptomic analysis will be measured. |
Other: Blood Collection Preterm
Blood will be collected on day 4 of life and then approximately every 3 days until 21 days of life. Thereafter, one sample will be collected weekly until discharge. For preterm neonates that have suspected sepsis an additional sample will be collected within 24-48 hours of the initial sepsis evaluation.
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Term Neonates Blood collection Term. From blood, the speed, directionality, and persistence of PMN chemotaxis using microfluidic devices and transcriptomic analysis will be measured. |
Other: Blood Collection Term
A single 250 µl blood sample will be collected once the term neonate is >24 hours old.
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Healthy Adult One-time whole blood draw of 1ml collection |
Other: Adult Blood collection
One Time 1 ml of whole blood collected
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Outcome Measures
Primary Outcome Measures
- Prediction of Sepsis in Premature Neonates [Days 4-21]
The study team will determine whether blood neutrophil migration phenotype using a microfluidic-based approach can be used to predict the onset of sepsis, as well as poor outcome from sepsis, in premature neonates. From peripheral blood, the study team will measure speed, directionality, and persistence of neutrophil chemotaxis using microfluidic devices. The goal is to prospectively identify and validate biomarkers that can stratify neonates who will become septic and have a protracted clinical course. To complement these functional assays, the study team will determine if transcriptomic profiling adds to the diagnostic resolution generated through these functional analyses.
Secondary Outcome Measures
- Neutrophil Function of Premature Neonate during Development [Days 22-180]
The study team will determine whether premature neonates restore a more normal neutrophil migration phenotype and genomic profile as they reach their developmental milestones during NICU admission
Eligibility Criteria
Criteria
Inclusion Criteria:
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For preterm neonates <32 weeks gestation at birth with no known or suspected congenital anomalies.
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For term neonates >36 weeks gestation at birth with no known or suspected congenital anomalies.
Exclusion Criteria:
- Congenital defects, suspected genetic disorders, 32-36 weeks completed gestation, or lack of consent.
Healthy Adult:
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Inclusion criteria Between the ages of 18 and 65 years of age
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Exclusion Criteria Taking any immune modifying medications or have an active immune modifying disease process
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | UF Health | Gainesville | Florida | United States | 32610 |
Sponsors and Collaborators
- University of Florida
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Investigators
- Principal Investigator: James L Wynn, MD, University of Florida
Study Documents (Full-Text)
None provided.More Information
Publications
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- Goldstein B, Giroir B, Randolph A; International Consensus Conference on Pediatric Sepsis. International pediatric sepsis consensus conference: definitions for sepsis and organ dysfunction in pediatrics. Pediatr Crit Care Med. 2005 Jan;6(1):2-8. Review.
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- Hill DA, Hoffmann C, Abt MC, Du Y, Kobuley D, Kirn TJ, Bushman FD, Artis D. Metagenomic analyses reveal antibiotic-induced temporal and spatial changes in intestinal microbiota with associated alterations in immune cell homeostasis. Mucosal Immunol. 2010 Mar;3(2):148-58. doi: 10.1038/mi.2009.132. Epub 2009 Nov 25.
- INIS Collaborative Group, Brocklehurst P, Farrell B, King A, Juszczak E, Darlow B, Haque K, Salt A, Stenson B, Tarnow-Mordi W. Treatment of neonatal sepsis with intravenous immune globulin. N Engl J Med. 2011 Sep 29;365(13):1201-11. doi: 10.1056/NEJMoa1100441.
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- Martin GS, Mannino DM, Moss M. The effect of age on the development and outcome of adult sepsis. Crit Care Med. 2006 Jan;34(1):15-21.
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- Sjögren YM, Tomicic S, Lundberg A, Böttcher MF, Björkstén B, Sverremark-Ekström E, Jenmalm MC. Influence of early gut microbiota on the maturation of childhood mucosal and systemic immune responses. Clin Exp Allergy. 2009 Dec;39(12):1842-51. doi: 10.1111/j.1365-2222.2009.03326.x. Epub 2009 Sep 3.
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- Stoll BJ, Hansen N, Fanaroff AA, Wright LL, Carlo WA, Ehrenkranz RA, Lemons JA, Donovan EF, Stark AR, Tyson JE, Oh W, Bauer CR, Korones SB, Shankaran S, Laptook AR, Stevenson DK, Papile LA, Poole WK. Changes in pathogens causing early-onset sepsis in very-low-birth-weight infants. N Engl J Med. 2002 Jul 25;347(4):240-7.
- Stoll BJ, Hansen N, Fanaroff AA, Wright LL, Carlo WA, Ehrenkranz RA, Lemons JA, Donovan EF, Stark AR, Tyson JE, Oh W, Bauer CR, Korones SB, Shankaran S, Laptook AR, Stevenson DK, Papile LA, Poole WK. Late-onset sepsis in very low birth weight neonates: the experience of the NICHD Neonatal Research Network. Pediatrics. 2002 Aug;110(2 Pt 1):285-91.
- Stoll BJ, Hansen NI, Adams-Chapman I, Fanaroff AA, Hintz SR, Vohr B, Higgins RD; National Institute of Child Health and Human Development Neonatal Research Network. Neurodevelopmental and growth impairment among extremely low-birth-weight infants with neonatal infection. JAMA. 2004 Nov 17;292(19):2357-65.
- Stoll BJ, Hansen NI, Bell EF, Shankaran S, Laptook AR, Walsh MC, Hale EC, Newman NS, Schibler K, Carlo WA, Kennedy KA, Poindexter BB, Finer NN, Ehrenkranz RA, Duara S, Sánchez PJ, O'Shea TM, Goldberg RN, Van Meurs KP, Faix RG, Phelps DL, Frantz ID 3rd, Watterberg KL, Saha S, Das A, Higgins RD; Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network. Neonatal outcomes of extremely preterm infants from the NICHD Neonatal Research Network. Pediatrics. 2010 Sep;126(3):443-56. doi: 10.1542/peds.2009-2959. Epub 2010 Aug 23.
- Strunk T, Currie A, Richmond P, Simmer K, Burgner D. Innate immunity in human newborn infants: prematurity means more than immaturity. J Matern Fetal Neonatal Med. 2011 Jan;24(1):25-31. doi: 10.3109/14767058.2010.482605. Epub 2010 Jun 23. Review.
- Watson RS, Carcillo JA. Scope and epidemiology of pediatric sepsis. Pediatr Crit Care Med. 2005 May;6(3 Suppl):S3-5. Review.
- Wong HR, Freishtat RJ, Monaco M, Odoms K, Shanley TP. Leukocyte subset-derived genomewide expression profiles in pediatric septic shock. Pediatr Crit Care Med. 2010 May;11(3):349-55. doi: 10.1097/PCC.0b013e3181c519b4.
- Wynn J, Cornell TT, Wong HR, Shanley TP, Wheeler DS. The host response to sepsis and developmental impact. Pediatrics. 2010 May;125(5):1031-41. doi: 10.1542/peds.2009-3301. Epub 2010 Apr 26. Review.
- Wynn JL, Cvijanovich NZ, Allen GL, Thomas NJ, Freishtat RJ, Anas N, Meyer K, Checchia PA, Lin R, Shanley TP, Bigham MT, Banschbach S, Beckman E, Wong HR. The influence of developmental age on the early transcriptomic response of children with septic shock. Mol Med. 2011;17(11-12):1146-56. doi: 10.2119/molmed.2011.00169. Epub 2011 Jul 5.
- Wynn JL, Guthrie SO, Wong HR, Lahni P, Ungaro R, Lopez MC, Baker HV, Moldawer LL. Postnatal Age Is a Critical Determinant of the Neonatal Host Response to Sepsis. Mol Med. 2015 Jun 2;21:496-504. doi: 10.2119/molmed.2015.00064.
- Wynn JL, Neu J, Moldawer LL, Levy O. Potential of immunomodulatory agents for prevention and treatment of neonatal sepsis. J Perinatol. 2009 Feb;29(2):79-88. doi: 10.1038/jp.2008.132. Epub 2008 Sep 4. Review. Erratum in: J Perinatol. 2009 Jul;29(7):527.
- Wynn JL, Scumpia PO, Delano MJ, O'Malley KA, Ungaro R, Abouhamze A, Moldawer LL. Increased mortality and altered immunity in neonatal sepsis produced by generalized peritonitis. Shock. 2007 Dec;28(6):675-683.
- Wynn JL, Scumpia PO, Winfield RD, Delano MJ, Kelly-Scumpia K, Barker T, Ungaro R, Levy O, Moldawer LL. Defective innate immunity predisposes murine neonates to poor sepsis outcome but is reversed by TLR agonists. Blood. 2008 Sep 1;112(5):1750-8. doi: 10.1182/blood-2008-01-130500. Epub 2008 Jun 30.
- Wynn JL, Wong HR. Pathophysiology and treatment of septic shock in neonates. Clin Perinatol. 2010 Jun;37(2):439-79. doi: 10.1016/j.clp.2010.04.002. Review.
- IRB201701566 N
- R01HD089939
- OCR26202