In vitro lymphocyte stimulation by wart antigen in man

Area of Science:

• Immunology
• Dermatology
• Virology

Background:

• Cell-mediated immunity plays a crucial role in controlling viral infections, including those caused by human papillomavirus (HPV).
• Assessing immune responses to specific antigens can provide insights into disease progression and resolution.

Purpose of the Study:

• To investigate cell-mediated immunity to wart antigen in individuals with active warts, a history of warts, and healthy controls.
• To determine if immune responses correlate with wart infection status and persist after wart resolution.

Main Methods:

• The lymphocyte transformation test (LTT) was employed to measure cell-mediated immune responses.
• 14C thymidine uptake was used as an indicator of DNA synthesis in lymphocytes stimulated with wart antigen.
• Patients with active warts were monitored post-treatment to assess changes in immune response.

Main Results:

• A distinct pattern of immune response to wart antigen was observed: a baseline in controls, elevated response in patients with active warts, and a further increase in those with a past history of warts.
• Following successful wart treatment, five patients exhibited heightened DNA synthetic activity in response to wart antigen.
• This augmented immune response was specific to wart antigen and remained detectable for up to six months post-resolution.

Conclusions:

• The lymphocyte transformation test is a valuable tool for evaluating cell-mediated immunity to wart antigen.
• Individuals with warts, particularly those with a history of infection, demonstrate a robust immune response to wart antigen.
• Successful wart resolution is associated with a persistent and specific increase in immune responsiveness to wart antigen, suggesting the development of lasting immunity.