Hematological changes in neonatal mice with phlebotomy-induced anemia

Area of Science:

• Neonatal Hematology
• Preclinical Disease Modeling

Background:

• Anemia is prevalent in preterm infants, stemming from blood draws and immature red blood cell production.
• The transition from fetal to neonatal life presents unique stressors for newborns.

Purpose of the Study:

• To investigate the hematological consequences of phlebotomy-induced anemia (PIA) in a preclinical mouse model.
• To understand how anemia impacts neonatal adaptation and potentially exacerbates illness.

Main Methods:

• C57BL/6 mice underwent timed phlebotomy between postnatal days 2-10 to induce anemia.
• Complete blood counts were analyzed using a Sysmex XT-2000iV analyzer.

Main Results:

• Anemic pups exhibited decreased red blood cells (RBC) and hemoglobin (Hb), with increased reticulocyte (RET) and red cell distribution width (RDW).
• Elevated immature reticulocyte fraction (IRF) and high fluorescent RET were observed, alongside reduced mean corpuscular volume (MCV), MCH, and MCHC.
• Monocytes and neutrophils increased significantly, while lymphocytes remained unchanged.

Conclusions:

• Phlebotomy-induced anemia in mouse pups leads to significant hematological alterations.
• These changes may contribute to the severity of neonatal diseases and highlight the need for further research into therapeutic interventions.