SIckle RBC are subject to a number of important cellular changes and selection pressures. In this study, we validated a biotin RBC label by comparison to the standard 51CR label, and used it to study changes that occur in sickle cells as they age. Sickle RBC had a much shorter lifespan than did normal RBC, but the two labels gave equivalent results for both cell types. A variable number of sickle, but not normal, RBC disappeared the circulation during the first few hours after reinfusion. The number of biotinylated sickle reticulocytes was decreased by fifty percent after 24 hours and 75% after 48 hours, with a gradual decrease in the amount of reticulum per cell. The labeled sickle cells exhibited major density increases during the first four to six days after reinfusion, with smaller changes thereafter. A small population of very light, labeled sickle RBC was essentially constant in number after the first few days. HbF content was determined in isolated biotinylated sickle RBC after reinfusion, allowing an estimate of lifespan for F cells and non-F cells. The lifespan of sickle B-RBC lacking HbF was estimated to be about two weeks, whereas F cells survived six to eight weeks.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
3M01RR008084-06S1
Application #
6122864
Study Section
Project Start
1998-12-01
Project End
1999-11-30
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
6
Fiscal Year
1999
Total Cost
Indirect Cost
Name
Cincinnati Children's Hospital Medical Center
Department
Type
DUNS #
071284913
City
Cincinnati
State
OH
Country
United States
Zip Code
45229
Natarajan, Girija; Shankaran, Seetha; Laptook, Abbot R et al. (2018) Association between sedation-analgesia and neurodevelopment outcomes in neonatal hypoxic-ischemic encephalopathy. J Perinatol 38:1060-1067
Askie, Lisa M; Darlow, Brian A; Finer, Neil et al. (2018) Association Between Oxygen Saturation Targeting and Death or Disability in Extremely Preterm Infants in the Neonatal Oxygenation Prospective Meta-analysis Collaboration. JAMA 319:2190-2201
DiFrancesco, Mark W; Shamsuzzaman, Abu; McConnell, Keith B et al. (2018) Age-related changes in baroreflex sensitivity and cardiac autonomic tone in children mirrored by regional brain gray matter volume trajectories. Pediatr Res 83:498-505
Autmizguine, Julie; Tan, Sylvia; Cohen-Wolkowiez, Michael et al. (2018) Antifungal Susceptibility and Clinical Outcome in Neonatal Candidiasis. Pediatr Infect Dis J 37:923-929
Jilling, Tamas; Ambalavanan, Namasivayam; Cotten, C Michael et al. (2018) Surgical necrotizing enterocolitis in extremely premature neonates is associated with genetic variations in an intergenic region of chromosome 8. Pediatr Res 83:943-953
Zeller, Meg H; Pendery, Emma C; Reiter-Purtill, Jennifer et al. (2017) From adolescence to young adulthood: trajectories of psychosocial health following Roux-en-Y gastric bypass. Surg Obes Relat Dis 13:1196-1203
Srinivasan, Lakshmi; Page, Grier; Kirpalani, Haresh et al. (2017) Genome-wide association study of sepsis in extremely premature infants. Arch Dis Child Fetal Neonatal Ed 102:F439-F445
Shankaran, Seetha; Laptook, Abbot R; McDonald, Scott A et al. (2017) Acute Perinatal Sentinel Events, Neonatal Brain Injury Pattern, and Outcome of Infants Undergoing a Trial of Hypothermia for Neonatal Hypoxic-Ischemic Encephalopathy. J Pediatr 180:275-278.e2
Hogan, Jonathan J; Palmer, Matthew D; Loren, Alison W et al. (2017) Quiz Page May 2017: CKD and Nephrotic Syndrome After Allogeneic Hematopoietic Cell Transplantation. Am J Kidney Dis 69:A10-A13
Di Fiore, Juliann M; Martin, Richard J; Li, Hong et al. (2017) Patterns of Oxygenation, Mortality, and Growth Status in the Surfactant Positive Pressure and Oxygen Trial Cohort. J Pediatr 186:49-56.e1

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