redOx Metabolism Clinical Trial
— HEALTHOXOfficial title:
Analyses of Bone Marrow and Blood Samples From Healthy Volunteers: Focus on the redOx Metabolism - HEALTHOX
| Verified date | August 2017 |
| Source | University Hospital, Tours |
| Contact | n/a |
| Is FDA regulated | No |
| Health authority | |
| Study type | Interventional |
Oxidative stress is defined by an excess of reactive oxygen species (reactive oxygen species
or ROS) in cells. ROS are essential to cell life (proliferation, differentiation), including
kinase activity via inhibition of phosphatases. Very low levels of ROS are observed in
quiescent cells, including hematopoietic stem cells. Conversely, an excess of ROS can induce
DNA damage that may lead to the destruction of the cell.
The level of ROS in cells is the result of production (mainly the NADPHoxydase and the
mitochondrial respiratory chain) and their disposal via antioxidant enzymes. The hematology
team of the university hospital of Tours (France) found that certain antioxidant enzymes are
essential for the self-renewal of normal and leukemic cells such as glutathione peroxidase-3
(Herault O et al, J Exp Med 2012, 209:895). Their expression is modified in hematological
diseases (patent WO2012085188A1 / 2012-06-28 and FR1000267310 / 2014-11-27).
Age potentially affects the level of expression of antioxidant genes, since it was
established a decrease in glutathione peroxidase activity in women over 65 years (Sara E, J
Gerontol A Biol Sci Med Sci 2008 63: 505). The study HEALTHOX will determine the impact of
age on the oxidative metabolism of normal hematopoietic cells, and in particular the
expression of antioxidant genes. It will provide a reference for analyzing disturbances of
oxidative metabolism in blood diseases. The main objective is the comparison of peripheral
blood and bone marrow cells depending from 3 groups of healthy volunteers: 18-39 years, 40-59
years and 60-85 years. The level of ROS and the expression of genes encoding the major
antioxidant enzymes involved in the regulation of oxidative stress will be studied. The
secondary objectives are to create a cell bank (blood and marrow), a blood plasma bank and a
cDNA library (blood and marrow) from healthy volunteers.
| Status | Completed |
| Enrollment | 102 |
| Est. completion date | August 2017 |
| Est. primary completion date | August 2017 |
| Accepts healthy volunteers | Accepts Healthy Volunteers |
| Gender | All |
| Age group | 18 Years to 85 Years |
| Eligibility |
Inclusion Criteria: - Healthy volunteers - Age = 18 years old and = 85 ans - Informed and written consent - Affiliation to Social Security Exclusion Criteria: - Subject with an history of hematologic disease - Subject with an history of tumoral disease with chemotherapy or radiotherapy - Subject with an history of infectious or inflammatory disease - Subject taking a treatment in prevention of blood clots - Subject under guardianship or protection measure - Subject with in the last 30 days food supplement rich in antioxidant : ascorbic acid, trace elements, etc… - Subject with in the last 30 days treatment with known effect on oxydative metabolism : N-Acetyl-Cysteine, etc… - Participant to a drug study - Pregnant woman |
| Country | Name | City | State |
|---|---|---|---|
| France | CHRU Tours | Tours |
| Lead Sponsor | Collaborator |
|---|---|
| University Hospital, Tours |
France,
| Type | Measure | Description | Time frame | Safety issue |
|---|---|---|---|---|
| Primary | Number of oxygene reactive species | Number of oxygene reactive species by flow cytometry | 12 months |