1
|
Djukić T, Drvenica I, Kovačić M, Minić R, Vučetić D, Majerič D, Šefik-Bukilica M, Savić O, Bugarski B, Ilić V. Dynamic light scattering analysis of immune complexes in sera of rheumatoid arthritis patients. Anal Biochem 2023:115194. [PMID: 37279816 DOI: 10.1016/j.ab.2023.115194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/25/2023] [Accepted: 05/22/2023] [Indexed: 06/08/2023]
Abstract
The size of circulating immune complexes (CICs) in rheumatoid arthritis (RA) could be an emerging criterion in disease diagnosis. This study analyzed size and electrokinetic potential of CICs from RA patients, healthy young adults, and RA patients age-matched controls aiming to establish their unique CIC features. Pooled CIC of 30 RA patients, 30 young adults, and 30 RA group's age-matched controls (middle-aged and oldеr healthy adults), and in vitro IgG aggregates from pooled sera of 300 healthy volunteers were tested using dynamic light scattering (DLS). Size distribution of CIC in healthy young adults exhibited high polydispersity. RA CIC patients and their age-matched control showed distinctly narrower size distributions compared with young adults. In these groups, particles clustered around two well-defined peaks. Particles of peak 1 were 36.1 ± 6.8 nm in RA age-matched control, and 30.8 ± 4.2 nm in RA patients. Particles of peak 2 of the RA age-matched control's CIC was 251.7 ± 41.2 nm, while RA CIC contained larger particles (359.9 ± 50.5 nm). The lower zeta potential of RA CIC, compared to control, indicated a disease-related decrease in colloidal stability. DLS identified RA-specific, but also age-specific distribution of CIC size and opened possibility of becoming a method for CIC size analysis in IC-mediated diseases.
Collapse
Affiliation(s)
- Tamara Djukić
- Innovation Center of the Faculty of Technology and Metallurgy Ltd, Belgrade, Serbia
| | - Ivana Drvenica
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia.
| | - Marijana Kovačić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
| | - Rajna Minić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
| | - Dušan Vučetić
- Institute for Transfusiology and Haemobiology, Military Medical Academy, Belgrade, Serbia; Faculty of Medicine of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Dragana Majerič
- School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Mirjana Šefik-Bukilica
- Institute for Rheumatology, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Olivera Savić
- Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Branko Bugarski
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - Vesna Ilić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
| |
Collapse
|
2
|
Alomari E, Bruno S, Ronda L, Paredi G, Bettati S, Mozzarelli A. Protein carbonylation detection methods: A comparison. Data Brief 2018; 19:2215-2220. [PMID: 30229098 PMCID: PMC6141388 DOI: 10.1016/j.dib.2018.06.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 06/27/2018] [Indexed: 01/30/2023] Open
Abstract
The data reported here are a comparison among four different methods for the detection of carbonylated proteins, a validated biomarker of oxidative stress. The reference samples were heart and kidney extracts of Guinea pigs transfused with hemoglobin-based oxygen carriers (Alomari et al. FRBM, [11]). We measured the carbonyl content of organ extracts by using i) the Levine spectrophotometric method, which takes advantage of the chromogenic reaction of carbonyl groups with 2,4-dinitrophenylhydrazine (DNPH), ii) a commercially available ELISA assay based on an anti-DNPH antibodies, iii) a commercially available Western blot method based on anti-DNPH antibodies and iv) an in-gel detection approach with the fluorophoric reagent fluorescein-5-thiosemicarbazide. The former two methods measure total protein carbonylation of a sample, whereas the latter two require an electrophoretic separation and therefore potentially allow for the identification of specific carbonylated proteins.
Collapse
Affiliation(s)
- Esra'a Alomari
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Stefano Bruno
- Department of Food and Drug, University of Parma, Parma, Italy.,Biopharmanet-TEC, University of Parma, Parma, Italy
| | - Luca Ronda
- Department of Medicine and Surgery, University of Parma, Parma, Italy.,Biopharmanet-TEC, University of Parma, Parma, Italy
| | - Gianluca Paredi
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Stefano Bettati
- Department of Medicine and Surgery, University of Parma, Parma, Italy.,Biopharmanet-TEC, University of Parma, Parma, Italy.,Istituto Nazionale Biostrutture e Biosistemi, Rome, Italy
| | - Andrea Mozzarelli
- Department of Food and Drug, University of Parma, Parma, Italy.,Biopharmanet-TEC, University of Parma, Parma, Italy.,Istituto Nazionale Biostrutture e Biosistemi, Rome, Italy.,Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Pisa, Italy
| |
Collapse
|
3
|
A novel PKD2L1 C-terminal domain critical for trimerization and channel function. Sci Rep 2015; 5:9460. [PMID: 25820328 PMCID: PMC4377555 DOI: 10.1038/srep09460] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 03/06/2015] [Indexed: 11/08/2022] Open
Abstract
As a transient receptor potential (TRP) superfamily member, polycystic kidney disease 2-like-1 (PKD2L1) is also called TRPP3 and has similar membrane topology as voltage-gated cation channels. PKD2L1 is involved in hedgehog signaling, intestinal development, and sour tasting. PKD2L1 and PKD1L3 form heterotetramers with 3:1 stoichiometry. C-terminal coiled-coil-2 (CC2) domain (G699-W743) of PKD2L1 was reported to be important for its trimerization but independent studies showed that CC2 does not affect PKD2L1 channel function. It thus remains unclear how PKD2L1 proteins oligomerize into a functional channel. By SDS-PAGE, blue native PAGE and mutagenesis we here identified a novel C-terminal domain called C1 (K575-T622) involved in stronger homotrimerization than the non-overlapping CC2, and found that the PKD2L1 N-terminus is critical for dimerization. By electrophysiology and Xenopus oocyte expression, we found that C1, but not CC2, is critical for PKD2L1 channel function. Our co-immunoprecipitation and dynamic light scattering experiments further supported involvement of C1 in trimerization. Further, C1 acted as a blocking peptide that inhibits PKD2L1 trimerization as well as PKD2L1 and PKD2L1/PKD1L3 channel function. Thus, our study identified C1 as the first PKD2L1 domain essential for both PKD2L1 trimerization and channel function, and suggest that PKD2L1 and PKD2L1/PKD1L3 channels share the PKD2L1 trimerization process.
Collapse
|
4
|
Faggiano S, Bruno S, Ronda L, Pizzonia P, Pioselli B, Mozzarelli A. Modulation of expression and polymerization of hemoglobin Polytaur, a potential blood substitute. Arch Biochem Biophys 2011; 505:42-7. [DOI: 10.1016/j.abb.2010.09.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 09/27/2010] [Accepted: 09/27/2010] [Indexed: 11/25/2022]
|