Total Memory CD27+ %

check icon Optimal Result: 10 - 33 % of CD19.

Total Memory CD27+ % - B Cell Subset Analysis

CD27 is a crucial surface marker used to identify memory B cells, making it an essential component in B cell subset analysis. When expressed as Total Memory CD27+ %, this measurement represents the percentage of B cells that have encountered antigens and differentiated into memory cells.

CD27 is a member of the tumor necrosis factor receptor family and serves as one of the most reliable markers for memory B cell identification.

Its expression indicates:

  1. Previous antigen exposure and successful immune responses
  2. The capacity for enhanced antibody responses upon re-exposure
  3. The immunological memory status of an individual

The Total Memory CD27+ % typically includes both:

  • Switched memory B cells (IgD-CD27+)
  • Non-switched memory B cells (IgD+CD27+)

Clinical significance includes:

Abnormal Total Memory CD27+ % can indicate various immunological conditions, including:

  • Common Variable Immunodeficiency (CVID)
  • Systemic autoimmune diseases
  • Immunosenescence
  • B cell lymphoproliferative disorders

Treatment Monitoring: Changes in Total Memory CD27+ % can help evaluate:

  • Response to immunotherapy
  • Immune reconstitution after treatment
  • Vaccination effectiveness

Normal ranges typically vary by age, with adults generally showing approximately 30-40% of total B cells expressing CD27. However, these values can vary significantly based on age, health status, and laboratory methods used for analysis.

When expressing Total Memory CD27+ as a percentage of CD19+ B cells, the typical range in healthy adults is approximately 25-45% of total CD19+ B cells. This means that in a healthy individual, about one-fourth to less than half of all CD19+ B cells are memory B cells expressing CD27. However, this percentage can vary significantly with age, with older adults often showing higher percentages due to accumulated antigen exposure throughout life, while young children typically have lower percentages as they are still building their immunological memory.

For accurate interpretation, Total Memory CD27+ % should be evaluated alongside other B cell markers and within the clinical context of each individual case.

What does it mean if your Total Memory CD27+ % result is too high?

Elevated levels of Total Memory CD27+ % can signify several conditions and states:

Clinical Conditions:

  • Chronic infections or ongoing inflammatory processes
  • Certain autoimmune disorders, where there is persistent antigen stimulation
  • Some lymphoproliferative disorders
  • Specific types of B-cell lymphomas

Physiological States:

  • Advanced age (immunosenescence), as older individuals naturally accumulate more memory B cells
  • Chronic antigen exposure
  • Post-vaccination status, particularly after multiple vaccinations
  • Recent recovery from infection

However, elevated levels should always be interpreted in conjunction with:

  • Other immunological markers
  • Complete clinical history
  • Patient's age
  • Recent infections or vaccinations
  • Overall health status

The significance of elevated levels can vary significantly depending on the clinical context and should be evaluated as part of a comprehensive immunological assessment rather than in isolation.

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