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Updated: Aug 13, 2026
Human In Vitro Suppression as Screening Tool for the Recognition of an Early State of Immune Imbalance
Published on: July 22, 2011
Immunosuppressive properties of human follicular fluid
J A Castilla1, R Molina, M A Lopez-Nevot
1Ciudad Sanitaria Virgen de las Nieves, Granada, Spain.
Insights
Human follicular fluid (FF) can directly inhibit immune cell responses. This fluid may also induce immunosuppressor cell activity in vitro, impacting immune cell function.
Area of Science:
- Immunology
- Reproductive Biology
- Cell Biology
Background:
- Human preovulatory follicular fluid (FF) plays a role in reproductive processes.
- The immunologic functions of FF are not fully understood.
- Investigating FF's immunomodulatory effects is crucial for reproductive health.
Purpose of the Study:
- To analyze the immunologic functions of human preovulatory follicular fluid (FF).
- To determine FF's effect on lymphocyte mitogenic response and immunosuppressor activity.
- To explore the relationship between FF immunosuppressor activity and in vitro fertilization outcomes.
Main Methods:
- Human lymphocytes were stimulated with concanavalin A (Con A).
- Lymphocytes were preincubated with varying concentrations of FF (20%, 2%, 1%).
- Mitogenic response and immunosuppressor activity of lymphocytes were assessed.
Main Results:
- Follicular fluid (FF) inhibited the mitogenic response of human lymphocytes to Con A.
- Lymphocyte immunosuppressor activity was induced by FF at 2% and 1% concentrations after 48 hours.
- No suppressor cell induction was observed with 20% FF, and no correlation with in vitro fertilization success was found.
Conclusions:
- Factors within human follicular fluid (FF) can directly inhibit lymphocyte response.
- FF possesses the capability to induce immunosuppressor cell activity in vitro.
- Further research is needed to identify specific factors and their clinical implications in reproductive immunology.
Abstract:
Human preovulatory follicular fluids (FF) obtained in the course of stimulated cycles were analyzed for their possible immunologic functions. Different concentrations of FF (20%, 2%, 1%) inhibited the mitogenic response of normal human lymphocytes to concanavalin A (Con A). Lymphocytes were assessed for immunosuppressor activity after preincubation with FF. Lymphocyte mitogenic response to Con A was only suppressed by cells preincubated with FF at concentrations of 2% and 1% for at least 48 hours. No evidence of suppressor cell induction was seen following incubation of lymphocytes with 20% FF, nor was any significant relationship between FF immunosuppressor activity and the outcome of in vitro fertilization observed. We conclude that some factor(s) in FF may be capable of directly inhibiting lymphocyte response and inducing immunosuppressor cell activity in vitro.
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