Pregnant Exposure to Persistent Organic Pollutants With Endocrine Disrupting Activity and Development of Breast Cancer in the Next 15 Years: Longitudinal Prospective Cohort Nested Case-control Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 155
- 试验地点
- 1
- 主要终点
- the Number of blood samples usable by return of patient non-opposition
研究概览
简要总结
Breast cancer, the first female cancer, affects one in eight women in her lifetime. The increase and uneven distribution of its prevalence throughout the world cannot be fully explained either by the increase in life expectancy, or by genetic factors present in less than 10% of cases, or by early detection, or by the use of hormone therapy for menopause at certain periods of time.
Numerous experimental and epidemiological arguments, as well as the increased risk of breast cancer in women after 50 years of age who were exposed in utero to Distilbene prescribed for their mothers in the 1950s to 75's, suggest the involvement of environmental factors involved in early development (nutrition, alcohol, tobacco, chemical pollutants) that may act as endocrine disruptors, estrogenomimetic or intervening on other nuclear receptors such as the However, the formal demonstration of the deleterious physiopathological role of such exposure comes up against methodological difficulties in epidemiological terms: first of all, the fact that correlation is sought at the time of the discovery of breast cancer when there are critical windows of exposure (fetal, perinatal, peripubertal and pregnant) and that persistent organic products or POPs, most often lipids, are present.
The objective of this project is to correlate the per-gravidic exposure to POPs (dioxins, dioxinlike, polychlorinated bisphenyls, organochlorine pesticides and flame-retardant polybrominated derivatives) and the development, within 15 years of delivery, of breast cancer, taking into account the confounding factors of classical breast cancer risk (age, reproductive events, etc.).
This project benefits on the one hand from a cord blood bank set up between 2002 and 2005 (6,242 samples) carried out at the Nice University Hospital and the Grasse University Hospital, during a PHRC and on the other hand from the cancer observatory / CRISAP of the PACA Corsica region, exhaustive to more than 92% since 2005, registers which will be cross-referenced and whose cancer cases (N) will be compared to controls. The assays will be carried out after purification, using high-resolution mass spectrometry gas chromatography coupling, the quantification being carried out according to the principle of isotopic dilution. They will be carried out by LABERCA in Nantes, the national reference laboratory of the French Health Agencies ANSES and INVS and also involved in various European projects. Concentrations related to blood lipids will be expressed in quartile and analyzed separately or combined with a cumulative score taking into account confounding risk factors for breast cancer and the geolocation of the initial and final residence in relation to the incinerator of the City of Nice (Department of Public Health CHU of Nice).
详细描述
Breast cancer, the first female cancer, affects one in eight women in her lifetime. The increase and uneven distribution of its prevalence throughout the world cannot be fully explained either by the increase in life expectancy, or by genetic factors present in less than 10% of cases, or by early detection, or by the use of hormone therapy for menopause at certain periods of time.
Numerous experimental and epidemiological arguments, as well as the increased risk of breast cancer in women after 50 years of age who were exposed in utero to Distilbene prescribed for their mothers in the 1950s to 75's, suggest the involvement of environmental factors involved in early development (nutrition, alcohol, tobacco, chemical pollutants) that may act as endocrine disruptors, estrogenomimetic or intervening on other nuclear receptors such as the However, the formal demonstration of the deleterious physiopathological role of such exposure comes up against methodological difficulties in epidemiological terms: first of all, the fact that correlation is sought at the time of the discovery of breast cancer when there are critical windows of exposure (fetal, perinatal, peripubertal and pregnant) and that persistent organic products or POPs, most often lipids, are present.
The objective of this project is to correlate the per-gravidic exposure to POPs (dioxins, dioxinlike, polychlorinated bisphenyls, organochlorine pesticides and flame-retardant polybrominated derivatives) and the development, within 15 years of delivery, of breast cancer, taking into account the confounding factors of classical breast cancer risk (age, reproductive events, etc.).
This project benefits on the one hand from a cord blood bank set up between 2002 and 2005 (6,242 samples) carried out at the Nice University Hospital and the Grasse University Hospital, during a PHRC and on the other hand from the cancer observatory / CRISAP of the PACA Corsica region, exhaustive to more than 92% since 2005, registers which will be cross-referenced and whose cancer cases (N) will be compared to controls. The assays will be carried out after purification, using high-resolution mass spectrometry gas chromatography coupling, the quantification being carried out according to the principle of isotopic dilution. They will be carried out by LABERCA in Nantes, the national reference laboratory of the French Health Agencies ANSES and INVS and also involved in various European projects. Concentrations related to blood lipids will be expressed in quartile and analyzed separately or combined with a cumulative score taking into account confounding risk factors for breast cancer and the geolocation of the initial and final residence in relation to the incinerator of the City of Nice (Department of Public Health CHU of Nice).
The implementation of such a protocol requires a preliminary feasibility phase, which is the subject of this AOI request and which will depend on:
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •woman who gave birth between 2002 and 2005 to a boy whose cord blood was stored in a 2002/2005 PHRC.
排除标准
- 未提供
结局指标
主要结局
the Number of blood samples usable by return of patient non-opposition
时间窗: 1 year
To make it possible from a regulatory and ethical point of view to use the exceptional bank of 6242 cord blood samples collected between 2002 and 2005 in the Nice (CHU) and Grasse maternity hospitals (CHR) and stored in the biochemistry laboratory (CHU Nice) in order to seek an association between the per-gravidic exposure to the main persistent organic pollutants of dioxins or dioxins-like type and the early onset in pregnant women.
次要结局
未报告次要终点