Involvement of the Inositol-trisphosphate Receptor in Invasive or Migratory-type Breast Cancers

• Conditions: Breast Cancer; Inosine Triphosphatase
• Interventions: Other: Assess the level of expression of IP3R3 in cancerous tissues and healthy tissues

• Registration Number: NCT03107234
• Lead Sponsor: Centre Hospitalier Universitaire, Amiens

Brief Summary

Breast cancer is the leading cause of female cancer and female death by cancer in France. Despite the improvement in early detection and therapeutic arsenal, the mortality of this cancer remains high with 11 886 deaths estimated in 2012. Breast cancer is most often a carcinoma born from the lobular or ductal epithelium and is classified In two main categories: non invasive and invasive. Invasive breast cancers account for 75% of the cases. They are usually ductal (75%) and more rarely lobular (25%). The cancer cells are then no longer circumscribed to the galactophoric canals or glands but have invaded neighboring tissues. If they are not treated in time, these cancers can then spread: the cancerous cells will then migrate either by the lymphatic vessels to reach the neighboring ganglia or through the blood vessels to give metastases in other tissues In the liver, lungs and bones). The mortality associated with breast cancer is not due to the growth of the primary tumor but rather to the occurrence of metastases. The study of the mechanisms leading to metastatic invasion (i.e. migration and invasion) is therefore of considerable importance. The development of metastases depends on the acquisition by the cancer cells of various capacities including that of being able to migrate, involving a remodeling of the cytoskeleton highly dependent on the intracellular calcium (Ca2 +) concentration. Several types of signals are able to induce mobilization of Ca2 + from the extracellular medium or endoplasmic reticulum (ER) reserves. At the intracellular level, some of these signals are generated by inositol (1,4,5) -trisphosphate (IP3) from the activation of G protein-coupled receptors or certain receptors with tyrosine kinase activity. Has been shown that the expression, activity and regulation of IP3R receptors (IP3Rs) are involved in the cancerous processes of many tissues, in particular in the phenomena of proliferation of breast cancer cells. Overall, altered expression and / or activity of IP3Rs can be used for the survival, growth, proliferation and migration of cancer cells.

In the laboratory, the investigator showed that regulation of the expression of subtype 3 (IP3R3) by 17β-estradiol (E2) is involved in the growth of the human mammary cancer line MCF-7. E2 triggers the release of Ca2 + in an IP3-dependent mechanism, while prolonged exposure to E2 leads to an increase in the expression of IP3R3. At the same time, the reduction in the expression of IP3R3 cancels the proliferative effect of E2 on MCF-7 cells. More recently, the investigator has established that IP3R3 regulates the proliferation of cells of the human MCF-7 mammary cancer cell line via a molecular and functional interaction with the Ca2 + -dependent BKCa potassium channel. The determination of IP3Rs, including subtype 3, as a mediator / marker of breast carcinogenesis appears to be a major clinical issue.

Detailed Description

Not available

Study Timeline

• Study Start: 2015-07-20
• Status Verified: 2017-04
• Study First Submitted: 2017-04-05
• Study First Submitted QC: 2017-04-10
• Last Update Submitted: 2017-04-10
• Study First Posted: 2017-04-11
• Last Update Posted: 2017-04-11
• Primary Completion: 2018-07-17
• Study Completion: 2018-07-17

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: Female
• Target Recruitment: 30

Inclusion Criteria

• CCI / CLI to be operated
• Grade SBR 1, 2 or 3
• Undifferentiated RE / PR status
• HER2 status undifferentiated
• Ki 67 indifferent
• Metastatic or not
• ADP axillary invaded or not
• Major Patients

Exclusion Criteria

• CIC / CIL
• Males

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Patient with breast cancer requiring surgery to	Assess the level of expression of IP3R3 in cancerous tissues and healthy tissues	-

Primary Outcome Measures

Name	Time	Method
Level of expression of IP3R3 defined by an immunohistochemical score	3 years

Trial Locations

Locations (1)

CHU Amiens Picardie; 🇫🇷 Amiens, Picardie, France