All clinical trials

Natural Killer cells (NK) are pivotal cells of innate immunity, that sense defective expression of HLA class I molecules and are complementary to specific cytotoxic T lymphocytes. A defect in NK cell cytotoxicity has been described in some hematopoietic malignancies such as acute myeloid leukemia, multiple myeloma, myelodysplastic syndroms. This defect is at least partially linked to a decreased or absent expression of some activating NK cell molecules, more particularly the so-called Natural Cytotoxicity Receptors (NCRs) NKp30, NKp44 and NKp46. Some old publications have demonstrated defective NK cytotoxicity in myeloproliferative syndroms (chronic myeloid leukemia, primary thrombocytosis, polycythemia vera). The investigators more particularly focused their attention on polycythemia vera (Vaquez's disease), a myeloproliferative disease characterized by the recently describet mutation V617F of the JAK2 tyrosine kinase. The investigators will precise the mechanisms leading to this cytotoxicity defect, the investigators also will evaluate the implication of V617F mutation on NK physiology, and will study the interactions between NK cells and hematopoietic progenitors.

The purpose of this study was to determine occurrence of ventilator associated pneumonia (VAP) in tracheostomized patients with COPD discharged in invasive mechanical ventilation (IMV) compared to patients with CPOPD discharged with tracheostomy but in non invasive mechanical ventilation (NIMV).

The main objective is to investigate mechanical alternans and MTWA in patients with heart failure caused by coronary artery disease to demonstrate a possible correlation between these two phenomena.

This is a prospective cohort single center study for assessment of normal value of acoustic radiation force impulse elastography and fibroscan in HIV patients without abnormal liver function and chronic liver disease.

This study has the purpose to investigate the benefit of treating breast cancer patients in prone position. This treatment is compared to the standard technique in our center (supine position with or without respiratory gating). The investigators want to compare the doses on the organs at risk (heart and lungs) in the different techniques.

Children with ADHD are in high risk to develope social difficulties. The present study will examine the emotional processing in those children. The main purpose is to investigate the connection between memory and recognition of facial expressions, how those abilities influence social functioning and if Methylphenidate influence the emotional processing. The study will include 80 children in ages 9-12 years, devided in 2 groups; children with ADHD treated with Methylphenidate, and healthy children without ADHD. The children will do computerized tasks that examine recognition and memory of facial expressions. Social function will be examined by questionnaires filled by parents and teachers.

To evaluate the contribution of internal and familial resources on the development of motherhood in a population of mothers having preterm twin infants and comparing this population to a population of mothers giving birth to single (or twins) full term infants.

This study investigates whether the amount of circulating plasma DNA can be used as a response marker for anti-cancer treatment in treating gross tumors.

Children with congenital lacrimal stenosis are treated by probing and intubation of the lacrimal drainage system. Hypothesis: Microbiological findings at the time of insertion and removal of the silicon intubation have an influence on the clinical outcome and success rate of the surgical treatment. Microbiological specimens are taken from conjunctiva and nasal mucosa during the two procedures under general anaesthesia and from the silicon tube after removal and examined for bacterial contamination.

The purpose of this study is to collect prospective data from individuals who are part of a Huntington Disease (HD) family, in order to relate phenotypes between individuals and families with each other and genetic factors in order to learn more about HD, develop potential treatments for HD, and to plan for future research studies of experimental drugs aimed at slowing or postponing the onset and progression of HD.