Study, 2001
How do tissue-breakdown proteins get turned on during a period?
Tissue contains special proteins that break down the uterine lining during menstruation. During a period, one type of protein is turned on by another protein when hormone levels drop.
What they did
Researchers studied endometrial tissue samples collected during different phases of the menstrual cycle. They measured when specific proteins became active and tested which molecules were required for this activation.
What they found
The protein called proMMP-9 was present throughout the cycle but only became active during the late menstrual phase. When tissue was cultured without progesterone and estrogen (mimicking menstrual conditions), proMMP-9 became active. This activation depended on another protein called MMP-3. When researchers blocked MMP-3, proMMP-9 activation was prevented.
What it means for you
This shows how the body activates proteins that break down the uterine lining during menstruation. This is laboratory research on tissue, not a study of women with symptoms. It helps explain the biological processes underlying menstruation but does not directly address PMS or PMDD.
About the study
- Original title
- In vivo perimenstrual activation of progelatinase B (proMMP-9) in the human endometrium and its dependence on stromelysin 1 (MMP-3) ex vivo
- Authors
- Rigot V, Marbaix E, Lemoine P et al.
- Journal
- The Biochemical journal
- Year
- 2001
- Study design
- Study
- What was tested
- None
- Open access
- Yes
- Read the paper
- doi.org/10.1042/0264-6021:3580275