Role of Oxytocin in Post-menopausal Osteoporosis: Evaluation on the Population of the OPUS Cohort

Oxytocin is a neurohypophysial hormone involved in several central and peripheral functions including parturition, milk let-down reflex and social behaviour. In vitro and animals studies have shown growing evidence that oxytocin plays a role in bone remodeling and osteoporosis. The investigators have previously show in a small sample of post-menopausal women with severe osteoporosis (n=20) compare to healthy control (n=16) that oxytocin serum level is significantly decreased, independently of leptin and estradiol, that are known to modulate oxytocin secretion. Thus, oxytocin appears as a new interesting factor in the osteoporosis pathophysiology. The aim of the present study is to confirm the relationships between bone status, evaluated by bone mineral density and prevalent fragility fractures, body composition and oxytocin serum levels on a large population. The investigators will also determine if the relationship between bone mineral density and oxytocin is independent of estradiol and leptin in this population and evaluate the relationships between oxytocin serum level and co-morbidities such as cardiovascular diseases, depression and dementia. Theses analysis will be done on the serum already available of 1000 women of the international OPUS cohort. Bone mineral density, body composition analysis by Dual energy X-ray Absorptiometry (DXA), estradiol and clinical data are already available. The investigators will select women, aged from 55 to 79 y at the time of inclusion.

Study Overview

• Status: Completed
• Conditions: Osteoporosis

• Study Type: Observational
• Enrollment (Actual): 1000

Contacts and Locations

Study Locations

• France
  • Nice, France, 06200
    • Hôpital Archet 1

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 55 years to 79 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Female

• Sampling Method: Probability Sample

Study Population

OPUS is a prospective study of postmenopausal women recruited in the general population between April 1999 and April 2001 from five European centers (Aberdeen (UK), Berlin (Germany), Kiel (Germany), Paris (Hôpital Cochin, France), and Sheffield (UK)). Investigations were approved at each institution according to the Declaration of Helsinki. Written consent was obtained from all subjects. Each center recruited approximately 500 postmenopausal women comprising 100 individuals in each 5-yr age band between 55 and 79. Ninety-nine percent of subjects were of white ethnicity.

Description

Inclusion Criteria:

• post-menopausal women,
• able to undergo bone density,
• without cognitive limitation,
• Age at the time of inclusion: 55 -79y,
• Written consent.

Exclusion Criteria:

• Individuals were excluded because of inability to undergo bone densitometry or perform specified investigations or because of cognitive limitations

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Retrospective

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

OPUS; OPUS is a prospective study of postmenopausal women recruited in the general population between April 1999 and April 2001 from five European centers (Aberdeen (UK), Berlin (Germany), Kiel (Germany), Paris (Hospital Cochin, France), and Sheffield (UK)). Investigations were approved at each institution according to the Declaration of Helsinki. Written consent was obtained from all subjects. Each center recruited approximately 500 postmenopausal women comprising 100 individuals in each 5-yr age band between 55 and 79. Ninety-nine percent of subjects were of white ethnicity.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
oxytocin serum levels	oxytocin serum levels, measured by radio-immuno assay, at the spine and the hip in post-menopausal women	at time = 0
bone mineral density	bone mineral density, measured by dual X ray absorptiometry at the spine and the hip in post-menopausal women	at time = 0

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Estradiol serum level	Estradiol serum level, body composition (lean mass and fat mass), measured by dual X ray absorptiometry, clinical data (age, age of menopause, previous family history of hip fracture, personal prevalent osteoporotic fractures, prevalent cardiovascular disease, depression and dementia)	at time = 0
leptin serum level	Leptinserum level, body composition (lean mass and fat mass), measured by dual X ray absorptiometry, clinical data (age, age of menopause, previous family history of hip fracture, personal prevalent osteoporotic fractures, prevalent cardiovascular disease, depression and dementia)	at time = 0

Collaborators and Investigators

• Sponsor: Centre Hospitalier Universitaire de Nice

Publications and helpful links

General Publications

• Breuil V, Fontas E, Chapurlat R, Panaia-Ferrari P, Yahia HB, Faure S, Euller-Ziegler L, Amri EZ, Szulc P. Oxytocin and bone status in men: analysis of the MINOS cohort. Osteoporos Int. 2015 Dec;26(12):2877-82. doi: 10.1007/s00198-015-3201-3. Epub 2015 Jun 25.
• Breuil V, Panaia-Ferrari P, Fontas E, Roux C, Kolta S, Eastell R, Ben Yahia H, Faure S, Gossiel F, Benhamou CL, Euller-Ziegler L, Amri EZ. Oxytocin, a new determinant of bone mineral density in post-menopausal women: analysis of the OPUS cohort. J Clin Endocrinol Metab. 2014 Apr;99(4):E634-41. doi: 10.1210/jc.2013-4126. Epub 2014 Jan 21.

Study record dates

Study Major Dates

• Study Start: July 1, 2011
• Primary Completion (Actual): October 1, 2011
• Study Completion (Actual): October 1, 2013

Study Registration Dates

• First Submitted: August 31, 2010
• First Submitted That Met QC Criteria: August 31, 2010
• First Posted (Estimate): September 1, 2010

Study Record Updates

• Last Update Posted (Estimate): August 14, 2015
• Last Update Submitted That Met QC Criteria: August 13, 2015
• Last Verified: August 1, 2015

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Metabolic Diseases; Musculoskeletal Diseases; Bone Diseases; Bone Diseases, Metabolic; Osteoporosis
• Other Study ID Numbers: 10-PP-07