Stachybotrys Induced Hemorrhage in the Developing Lung
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|ClinicalTrials.gov Identifier: NCT00011700|
Recruitment Status : Completed
First Posted : February 28, 2001
Last Update Posted : April 14, 2015
|Condition or disease|
|Idiopathic Pulmonary Hemorrhage|
Over the past seven years in the Cleveland, Ohio area there have been 47 cases of unexplained pulmonary hemorrhage in young infants. Sixteen of the infants have died. A CDC case-control study found an association with water-damaged homes and the toxigenic fungus, Stachybotrys chartarum, which requires water soaked cellulose to grow. The spores of this fungus are not infectious in the lung but do contain very potent mycotoxins which appear to be particularly toxic to the rapidly developing lungs of young infants. Secondary stresses, e.g. environmental tobacco smoke, appear to be important triggers of overt hemorrhage. Concern that there may be a larger number of undetected young infants with this disorder led to the examination of all infant coroner cases, which revealed six sudden infant death syndrome cases with major amounts of pulmonary hemosiderin-laden macrophages, indicating extensive hemosiderosis existing prior to death. All of these infants had lived in the eight zip code area where all but fifteen of the patients have lived. This disorder may extend beyond Cleveland since toxigenic fungi are widespread. We are aware of a total of 138 infants with idiopathic pulmonary hemorrhage across the country over the past four years.
The purpose of this proposal is to establish an infant animal model for this stachybotryomycotoxicosis which can be used to understand the developmental pathophysiology by which the fungal spores induce hemorrhage and to address practical problems faced in the clinical care of these infants and in public health prevention. The model uses tracheal instillation of toxic Stachybotrys spores in neonatal to weanling rats to initiate the pathological process, followed by stresses to trigger acute hemorrhage. Capillary fragility to transmural pressures will be assessed by morphometric analysis of electron micrographs. Markers of Stachybotrys exposure which can be applied to clinical cases are being developed and tested in the rats.
|Study Type :||Observational|
|Estimated Enrollment :||50 participants|
|Study Start Date :||January 1999|
|Primary Completion Date :||January 2009|
|Study Completion Date :||January 2009|
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00011700
|United States, Ohio|
|Rainbow Babies and Children's Hospital, Case Western Reserve University|
|Cleveland, Ohio, United States, 44106|
|Principal Investigator:||Dorr G Dearborn, MD, PhD||Case Western Reserve University|