Digital repository of Slovenian research organisations

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in
Research data

Options:
  Reset

Query: "author" (Renato Eržen) .

1 - 3 / 3
First pagePrevious page1Next pageLast page
1.
Pogoste alergijske bolezni
Renato Eržen, 2012

DiRROS - Published: 15.04.2016; Views: 2039; Downloads: 238
URL Fulltext (0,00 KB)This document is also a collection of 1 document!

2.
Chemokines during anaphylaxis : the importance of CCL2 and CCL2-dependent chemotactic activity for basophils
Romana Vantur, Maruša Rihar, Ana Koren, Matija Rijavec, Peter Kopač, Urška Bidovec, Renato Eržen, Peter Korošec, 2020

Abstract: Background: The role of chemokines in anaphylaxis is unclear. Methods: We prospectively recruited 49 patients presenting to the emergency department with an acute episode of anaphylaxis and 28 healthy subjects. We measured serum levels of the chemokines CCL2, CCL5, CCL7, CCL8, CCL11, CCL13, CCL17, CCL21, CCL22, CCL24, and CCL26, tryptase, the absolute number of circulating basophils, monocytes, lymphocytes, and PMNs, and whole blood FCER1A, CPA3 and HDC gene expression at two time points: during the anaphylactic episode and in convalescent samples collected approximately 3 months later. We then investigated the in vitro chemotactic activity of chemokines induced during anaphylaxis for the in vitro migration of the corresponding cells. Results: Only CCL2 chemokine levels were signifcantly increased in anaphylaxis samples (median 514 pg/ml) compared to convalescent samples (284 pg/ml, P<0.0001) and healthy subjects (279 pg/ml, P<0.0001); there was no signifcant diference in any of the other chemokines. There was a signifcant positive correlation between the rates of increase of serum CCL2 (median [range]: 106.0% [-44.7% to 557.4%]) and tryptase (133.8% [-6.6% to 893.4%]; r=0.68, P<0.0001) and between the acute concentration of serum CCL2 and the acute concentration of serum tryptase (r=0.77, P<0.0001). The number of circulating basophils, but not other blood cells, signifcantly decreased during anaphylaxis (median 5.0 vs. 19.1 cells/[micro]l in convalescent samples; P<0.0001); a decrease in whole-blood gene expression of basophil markers (PKeywords: anaphylaxis, chemokines, tryptases, basophils, chemotaxis, CCL2, cell migration
DiRROS - Published: 18.01.2021; Views: 203; Downloads: 108
.pdf Fulltext (2,04 MB)

3.
Routine KIT p.D816V screening identifies clonal mast cell disease in Hymenoptera allergic patients regularly missed using baseline tryptase levels alone
Peter Korošec, Jonathan J. Lyons, Mitja Košnik, Samo Zver, Vladka Čurin-Šerbec, Yihui Liu, Young Hwan Park, Ajda Demšar, Nisera Bajrović, Matevž Škerget, Peter Kopač, Mihaela Zidarn, Renato Eržen, Matija Rijavec, Julij Šelb, 2021

Abstract: Background. Clonal mast cell disorders and elevated BST of unknown cause(s) are associated with severe Hymenoptera venom-triggered anaphylaxis (HVA). However, some individuals with clonal disease have normal BST (<11.4 ng/mL). Objective. To evaluate whether screening for KIT p.D816V in the blood is a useful clinical tool to risk-stratify patients with venom allergy. Methods. We prospectively recruited 374 patients with Hymenoptera allergy and no overt signs of mastocytosis referred to our center in the years 2018-19. KIT p.D816V was determined in the peripheral blood with qPCR and tryptase genotyping was performed by droplet-digital PCR. Results. 351 patients (93.9%) had normal levels of BST and KIT p.D816V was detected in 8% of patients (28/351), predominantly in patients with the most severe Mueller grade IV anaphylaxis (18.2%[24/132] vs 1.8%[4/88 in grade III; 0/131 in other grades] in lower grades; P<0.001). In grade IV patients with normal BST, KIT p.D816V was associated with more severe symptoms including a significantly higher frequency of loss of consciousness (58.3%[14/24] vs 34.3%[37/108]; P=0.03) and absence of skin symptoms (41.7%[10/24] vs 15.7%[17/108]; P=0.004). Among patients with normal BST, KIT p.D816V (OR [95%CI]: 10.25[3.75-36.14]; P<0.0001) was the major risk factor associated with severe HVA. Hereditary [alpha]-tryptasemia (H[alpha]T), due to increased germline copies of TPSAB1 encoding [alpha]-tryptase was the most common cause (65.2%; 15/23) of elevated BST in patients with HVA and together with KIT p.D816V accounted for 90% (20/23) of BST elevations in HVA patients. Conclusion. These results indicate that routine KIT p.D816V screening identifies clonal disease in high-risk HVA patients regularly missed using BST alone.
Keywords: anaphylaxis, venoms, hypersensitivity, hereditary alpha-tryptasemia
DiRROS - Published: 31.03.2021; Views: 73; Downloads: 31

Search done in 0 sec.
Back to top