Explore the Role of NLRP7 in the Regulation of Progestereone Induced Decidualization of Human Endometrial Stroma Cells

NCT04148638 | Completed

• 1 other identifier: A-ER-102-440
• Study Type: observational
• Target: 204
• Locations: 1 country
• Sites: 1

Brief Summary

The investigators have found that NLRP7 was upregulated and nuclear translocated in an in vitro model of decidualization. Knock-down or overexpression of NLRP7 reduced or enhanced the expression of decidual marker IGFBP-1. NLRP7 was also found to promote progesterone receptor (PR) activity. So, the investigators hypothesized that NLRP7 may regulate progesterone-induced decidualization of human endometrial stromal cells. Part I is to explore how NLRP7 is induced during the decidualization. According to the luciferase activities of NLRP7 promoter luciferase reporter systems, the region from -100 to +37 or from -1200 to -100 had positive or negative regulatory elements, respectively, in the in vitro decidualization. Part II is to explore how NLRP7 contributes the decidualization of endometrial stromal cells. By immunoprecipitations of NLRP7 or PR, the investigators found NLRP7 might involve in the transcriptional complex of PR in the in vitro decidualization. The NLRP7 interacting protein in the co-immunoprecipitations the investigatorsre analyzed by LC/MS-MS. Part III is to explore the effects of NLRP7 mutations on in vitro decidualization and macrophage differentiation. Comparing to RFP control, the investigators found wild-type NLRP7 enhanced but NLRP7 mutants reduced IGFBP-1 expression in the in vitro decidualization. In the M1 macrophage differentiation of THP-1, wild-type and mutant NLRP7 reduced IL-1β expression compared to the RFP control. Part IV is to explore a role of MPA in macrophage differentiation. MPA drives THP-1 cells a M2-like macrophage differentiation toward a phenotype of decidual macrophages, which promoted in vitro decidualization and trophoblastic invasion, but tolerated TLR ligands stimulations. In conclusion, NLRP7 contributes in vitro decidualization of endometrial stromal cells; NLRP7 mutation may impede in vitro decidualization; NLRP7 may suppress IL-1 expression in M1 macrophage differentiation; MPA drives M2 macrophage differentiation toward a phenotype of decidual macrophage.

Conditions

Inflammatory Response; Abortion, Habitual

Outcome Measures

Primary Outcomes (1)

• NLRP7 expressed in the decidualized stromal cells of the human endometrium during the first trimester.

  The tissue sections of the non-pregnant endometrium (n = 5) or the first trimester endometrium (n = 5) were deparaffinized, rehydrated and stained with NLRP7 antibody. Representative images of NLRP7 immunohistochemistry in the endometrium are shown. The NLRP7 signal was developed with the anti-rabbit HRP antibody and AEC substrate. Staining with the 2nd antibody only served as the negative control. Arrows point to the endometrial stromal cells. NLRP7 dominantly appeared in the swollen decidualized stromal cells of pregnant endometrium, but not in the stromal cells of non-pregnant endometrium (magnification 200X)

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Eligibility Criteria

• Age: 20 Years - 50 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

Study Population

It is known that NLRP7, a member of the protein family related to innate immunity, is associated with habitual abortion, and it is found that dysfunction of NLRP7 protein may affect endometrial decidualization and facilitate embryo implantation.

Sponsors & Collaborators

• National Cheng-Kung University Hospital: lead

Study Sites (1)

National Cheng-Kung University Hospital

Tainan, 70428, Taiwan

Location

Biospecimen

Retention: SAMPLES WITH DNA

Blood

MeSH Terms

Conditions

Abortion, Habitual

Condition Hierarchy (Ancestors)

Abortion, Spontaneous; Pregnancy Complications; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases

Study Officials

• Pao-Lin Kuo, MD

  Department of Obstetrics and Gynecology, National Cheng Kung University Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: CASE CONTROL
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: October 28, 2019
• First Posted: November 1, 2019
• Study Start: August 1, 2015
• Primary Completion: July 1, 2018
• Study Completion: July 1, 2018
• Last Updated: October 5, 2022

Record last verified: 2019-11

Locations

TW (1)