Abstract
Objective
To estimate the frequency of acquired ADAMTS13 deficiency in severe cases of Hemiscorpius lepturus stung patients and the frequency of acute kidney injury (AKI) in these patients.
Methods
Sixty scorpion stung children who were referred with severe hemolysis and hemoglobinuria were studied. None of them had received blood products and no one had a past medical history of renal failure.
Results
Plasma levels of ADAMTS13 and ADAMTS13 antibody (IgG) were measured using ELISA. ADAMTS13 was decreased in 91.7 % of patients and the anti-ADAMTS13 antibody (Ab) was increased in 98.3 %. ADAMTS13 decreased in all of the patients with acute kidney injury and none of those with normal levels of ADAMTS13 developed renal failure; all patients with AKI had also increased levels of ADAMTS13Ab. Acute kidney injury was found in 23.3 % and had significant association with severe anemia, thrombocytopenia, pyuria, hematuria and considerable proteinuria (p < 0.001). Disseminated intravascular coagulation (DIC) and Hemolytic uremic syndrome (HUS) developed in 6.7 % and 10 % respectively.
Conclusions
The index findings demonstrate that Hemiscorpius lepturus sting is usually associated with ADAMTS13 deficiency, and increased ADAMTS13 autoantibody. These combined mechanisms may contribute to scorpion sting-induced coagulopathies and may predispose patients to develop DIC and HUS.
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Acknowledgements
The authors thank the mothers, children and families that participated; the nurses, supervisors and field staff of nephrology ward for their devotion and hard work.
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Role of Funding Source
Vice-chancellor of the research center of Ahvaz Jundishapur University of Medical Sciences (No: U-90027).
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Valavi, E., Ahmadzadeh, A., Amoori, P. et al. High Frequency of Acquired ADAMTS13 Deficiency After Hemolysis in Hemiscorpius Lepturus (Scorpion) Stung Children. Indian J Pediatr 81, 665–669 (2014). https://doi.org/10.1007/s12098-013-1089-5
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DOI: https://doi.org/10.1007/s12098-013-1089-5