title: Platelet aggregation in children with Helicobacter pylori infection.
abstract: This study was performed to investigate the platelet aggregation alterations in platelet-rich plasma (PRP) samples of children with Helicobacter pylori (H pylori) infection. Platelet aggregation induced by adenosine diphosphate (ADP), collagen, ristocetin, or epinephrine was studied with photometric aggregometry in 30 patients before and after eradication therapy and in a control group including 15 children. The pretreatment mean maximum aggregation values and slope were significantly lower (P < .0001) in the study group at 10 μmol/L concentrations of ADP (ADP-like defect). The maximum aggregation values and slope revealed no significant differences (P > 0.05) between the study group after therapy and the control group. We concluded that H pylori infection may cause dysfunction of platelets in children and can be reversed by H pylori eradication therapy. Further studies should be carried out to determine the mechanisms of platelet dysfunction in children with H pylori infection.
authors.affiliation: Department of Pediatric Hematology, Gulhane Military Medical Academy, Ankara, Turkey. orhangursel08@mynet.com
authors.forename: Orhan
authors.initials: O
authors.lastname: Gursel
authors.forename: A Avni
authors.initials: AA
authors.lastname: Atay
authors.forename: A Emin
authors.initials: AE
authors.lastname: Kurekci
authors.forename: Ferit
authors.initials: F
authors.lastname: Avcu
authors.forename: Oral
authors.initials: O
authors.lastname: Nevruz
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Senses
authors.forename: Emel
authors.initials: E
authors.lastname: Ozturk
authors.forename: Adnan
authors.initials: A
authors.lastname: Hasimi
authors.forename: Okan
authors.initials: O
authors.lastname: Ozcan
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D000293:Adolescent; D001792:Blood Platelets / Q000187:drug effects / Q000502:physiology; D016022:Case-Control Studies; D002648:Child; D003094:Collagen / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D005260:Female; D016481:Helicobacter Infections / Q000097:blood* / Q000188:drug therapy; D016480:Helicobacter pylori / Q000502:physiology*; D006801:Humans; D008297:Male; D010974:Platelet Aggregation / Q000187:drug effects / Q000502:physiology*; D053657:Platelet-Rich Plasma / Q000187:drug effects / Q000502:physiology; D012310:Ristocetin / Q000494:pharmacology
chemical_list: D012310:Ristocetin; D000244:Adenosine Diphosphate; D003094:Collagen; D004837:Epinephrine