title: Hematopoietic stem cell transplantation for people with sickle cell disease.
abstract: BACKGROUND
  Sickle cell disease is a genetic disorder involving a defect in the red blood cells due to its sickled hemoglobin. The main therapeutic interventions include preventive and supportive measures. Hematopoietic stem cell transplantations are carried out with the aim of replacing the defective cells and their progenitors (hematopoietic (i.e. blood forming) stem cells) in order to correct the disorder. This is an update of a previously published review.
  
  
  OBJECTIVE
  To determine whether stem cell transplantation can improve survival and prevent symptoms and complications associated with sickle cell disease. To examine the risks of stem cell transplantation against the potential long-term gain for people with sickle cell disease.
  
  
  METHODS
  We searched the Cochrane Cystic Fibrosis and Genetic Disorders Group Group's Haemoglobinopathies Trials Register complied from electronic searches of the Cochrane Central Register of Controlled Trials (CENTRAL) (updated each new issue of The Cochrane Library) and quarterly searches of MEDLINE.Unpublished work was identified by searching the abstract books of major conference proceedings and we conducted a search of the website: www.ClinicalTrials.gov.Date of the most recent search of the Group's Haemoglobinopathies Trials Register: 06 October 2015.
  
  
  METHODS
  Randomized controlled and quasi-randomized studies that compared any method of stem cell transplantation with either each other or with any of the preventive or supportive interventions (e.g. periodic blood transfusion, use of hydroxyurea, antibiotics, pain relievers, supplemental oxygen) in people with sickle cell disease irrespective of the type of sickle cell disease, gender and setting.
  
  
  METHODS
  No relevant trials were identified.
  
  
  RESULTS
  Ten trials were identified by the initial search and none for the update. None of these trials were suitable for inclusion in this review.
  
  
  CONCLUSIONS
  Reports on the use of hematopoietic stem cell transplantation improving survival and preventing symptoms and complications associated with sickle cell disease are currently limited to observational and other less robust studies. No randomized controlled trial assessing the benefit or risk of hematopoietic stem cell transplantations was found. Thus, this systematic review identifies the need for a multicentre randomized controlled trial assessing the benefits and possible risks of hematopoietic stem cell transplantations comparing sickle status and severity of disease in people with sickle cell disease.
authors.affiliation: GIDP Entomology and Insect Science, University of Tucson, Tucson, Arizona, USA, 85721.
authors.forename: Chioma
authors.initials: C
authors.lastname: Oringanje
authors.forename: Eneida
authors.initials: E
authors.lastname: Nemecek
authors.forename: Oluseyi
authors.initials: O
authors.lastname: Oniyangi
mesh_terms: D000755:Anemia, Sickle Cell / Q000601:surgery*; D002648:Child; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans