IRCCS Sacro Cuore Don Calabria hospital
Negrar, Verona, 37024, Italy
Location status: Recruiting
NCT Number: NCT06307171
This is an exploratory experimental multicentre study on archived serum samples and on prospectively collected serum samples and blood samples.
General objectives of the study are: to identify specific biomarkers in order to develop more accurate serological tests for the screening of Leishmania infections that does not present cross-reaction with other infectious diseases; to unveil the Antigen Recognition Patterns (ARPs) of Leishmania infection in humans; to verify whether the ARPs and the new biomarkers are common to different Leishmania infantum strains isolated in Italy as well as in other part of the World and to different strains of L. donovani isolated in Sudan as well as in other part of the World and discard any possible cross reaction with other infectious diseases such as Chagas, TB, leprosy or malaria.
Interested in participating?
Request Info18 year and older
All sexes
Interventional
Not applicable
Negrar, Verona, 37024, Italy
Location status: Recruiting
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
CASES:
Inclusion criteria
Exclusion criteria
COMMUNITY CONTROLS:
Inclusion criteria
Exclusion criteria
VALIDATION CONTROLS (VC):
Inclusion criteria
Exclusion criteria
Sample will be collected at the collaborating centres and at the DITM, if not already stored at -80°C. The samples will be delivered to the DITM. For the CONTROL groups, two serological tests for Leishmaniasis, based on different antigenic fraction, will be performed on serum samples.
Different strains of Leishmania infantum and Leishmania donovani will be cultivated axenically at the DITM.
Whole soluble fraction of promastigote (WSF), the whole membrane protein fraction (WMF) and the whole soluble fraction secreted by promastigotes (WSFe) of Leishmania spp. will be obtained and the ARPs from WSF, WMF and WSFe, of each Leishmania will be checked trough Western-blot analysis testing at a final dilution of 1/100 each serum sample. The predominant bands detected by Western-blot analysis will be identified by SDS-PAGE separation. Selected bands, corresponding to the immunogenic bands, will be excised, digested and identified with Mass Spectrometry analysis.
Time frame: Baseline
Presence/Absence of a reactive immunogenic band or a pattern of reactive immunogenic bands in an in-house Western blot, specific for Leishmania cases respect to negative controls.
Time frame: Baseline
Presence/Absence of a common or differential reactive immunogenic band/pattern in different Leishmania infantum and Leishmania donovani strains from different geographical areas.
Time frame: Baseline
Presence/Absence of cross-reaction of the identified immunogenic bands, testing serum samples of patients with malaria or TB or leprosy or Chagas' disease
IRCCS Sacro Cuore Don Calabria di Negrar
Other
Acronym: LeishmARPs
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