The gut microbiome in sickle cell disease: Characterization and potential implications

Area of Science:

• Microbiome research
• Gastroenterology
• Hematology

Background:

• Sickle Cell Disease (SCD) is an inherited blood disorder causing anemia, pain, and organ damage.
• Recurrent gut hypoxia-reperfusion injury in SCD may increase permeability and bacterial translocation.
• The gut microbiome plays a crucial role in health and disease, potentially impacting SCD.

Purpose of the Study:

• To characterize the gut microbiome composition in individuals with Sickle Cell Disease.
• To investigate potential alterations in bacterial communities associated with SCD.
• To compare gut microbiome profiles between SCD patients and healthy controls.

Main Methods:

• Collected stool and saliva samples from 14 healthy controls and 14 SCD subjects.
• Utilized Next Generation Sequencing (NGS) of amplified 16S rDNA for bacterial analysis.
• Analyzed bacterial composition and differentials in human and murine samples using DeSeq software.

Main Results:

• Observed significant gut microbiome dysbiosis in SCD patients compared to controls.
• Identified a lower Firmicutes/Bacteroidetes ratio in SCD patients.
• Found increased abundance of specific bacterial families (e.g., Acetobacteraceae, Bifidobacteriaceae) and 420 distinct OTUs in SCD patients.

Conclusions:

• SCD is associated with gut dysbiosis involving pro-inflammatory bacterial triggers.
• The Townes SCD mouse model mirrors human gut dysbiosis, serving as a valuable research tool.
• Further research can explore gut microbiome modulation's impact on SCD pathophysiology.