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Microfluidic Assays for CD4 T Lymphocyte Counting: A Review
Zhuolun Meng1, Hassan Raji1, Mahtab Kokabi1
1Electrical and Computer Engineering, Rutgers University-New Brunswick, 94 Brett Road, Piscataway, NJ 08854, USA.
Insights
Accurately counting CD4 T cells is vital for monitoring HIV progression. This review explores innovative, cost-effective microfluidic devices as a solution for resource-limited settings.
Area of Science:
- Immunology
- Biomedical Engineering
- Global Health
Background:
- CD4 T lymphocytes are crucial for adaptive immunity and immune health.
- Human Immunodeficiency Virus (HIV) depletes CD4 cells, making counts critical for disease monitoring.
- Current gold-standard flow cytometry is expensive and complex for resource-limited settings.
Purpose of the Study:
- To review and analyze emerging technologies for CD4 T cell enumeration.
- To highlight the need for rapid, cost-effective, and portable CD4 counting methods.
- To focus on microfluidic systems as a promising alternative.
Main Methods:
- Literature review of recent advancements in CD4 counting techniques.
- Analysis of microfluidic systems for CD4 enumeration.
- Assessment of methods for resource-limited environments.
Main Results:
- Flow cytometry, while accurate, presents significant barriers in cost, portability, and expertise.
- Microfluidic technologies show potential for rapid, low-cost, and portable CD4 counting.
- Emerging methods aim to overcome the limitations of traditional flow cytometry.
Conclusions:
- There is a critical need for accessible CD4 counting solutions in global healthcare.
- Microfluidic systems offer a promising avenue for developing next-generation CD4 enumeration tools.
- Advancements in microfluidics could significantly improve HIV management in resource-limited regions.
Abstract:
CD4 T lymphocytes play a key role in initiating the adaptive immune response, releasing cytokines that mediate numerous signal transduction pathways across the immune system. Therefore, CD4 T cell counts are widely used as an indicator of overall immunological health. HIV, one of the leading causes of death in the developing world, specifically targets and gradually depletes CD4 cells, making CD4 counts a critical metric for monitoring disease progression. As a result, accurately counting CD4 cells represents a pressing challenge in global healthcare. Flow cytometry remains the gold standard for enumerating CD4 T cells; however, flow cytometers are expensive, difficult to transport, and require skilled medical staff to prepare samples, operate the equipment, and interpret results. This highlights the critical need for novel, rapid, cost-effective, and portable methods of CD4 enumeration that are suitable for deployment in resource-limited countries. This review will survey and analyze emerging research in CD4 counting, with a focus on microfluidic systems, which represent a promising area of investigation.