CA-125 levels in human uterine fluid.

Area of Science:

• Gynecology
• Reproductive Endocrinology
• Biochemistry

Background:

• CA-125 (cancer antigen 125) is a tumor marker often monitored in gynecological conditions.
• Understanding CA-125 dynamics in the female reproductive tract is crucial for accurate interpretation of its levels.

Purpose of the Study:

• To quantify uterine fluid CA-125 concentrations.
• To investigate potential phase-dependent variations of uterine fluid CA-125 during the menstrual cycle.
• To compare uterine fluid CA-125 levels with concurrent serum CA-125 levels.

Main Methods:

• CA-125 levels were measured in uterine fluid collected during the follicular and luteal phases of the menstrual cycle.
• Paired uterine fluid and serum samples were obtained sequentially in the midfollicular and midluteal phases.
• Statistical analysis was performed to compare levels between phases and between fluids.

Main Results:

• Uterine fluid CA-125 concentrations were significantly higher than serum levels, with a wider range observed.
• Follicular phase uterine fluid CA-125 ranged from 16.4 x 10(3) to 616.5 x 10(3) U/mL.
• Luteal phase uterine fluid CA-125 ranged from 6.2 x 10(3) to 567.3 x 10(3) U/mL, showing no significant difference from the follicular phase (P = 0.75).
• Serum CA-125 levels showed a significant increase in the midluteal phase (P < 0.05).

Conclusions:

• Uterine fluid exhibits high concentrations of CA-125.
• CA-125 levels in uterine fluid remain relatively stable and do not fluctuate significantly between the follicular and luteal phases of the menstrual cycle.
• These findings highlight distinct dynamics of CA-125 in uterine fluid compared to serum.