ArticleThe Biochemical journal1994
Lytic anti-alpha-galactosyl antibodies from patients with chronic Chagas' disease recognize novel O-linked oligosaccharides on mucin-like glycosyl-phosphatidylinositol-anchored glycoproteins of Trypanosoma cruzi.
Article in The Biochemical journal, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 101 papers.
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Who cites it
101 citing papers in PubMed, 226 citations in OpenAlex.
- Glycocalyx-Driven Immunomodulation in Trypanosoma cruzi: Structures, Host Responses, Diagnostic and Therapeutic Targeting.Parasite immunology · 2026Review
- Distinct nanoscale membrane organizations of mucins andbioRxiv : the preprint server for biology · 2026Article
- Conjugates of α-d-Galp-(1→3)-β-d-Galp for the serological diagnosis of Chagas disease.PLoS neglected tropical diseases · 2026Article
- Conjugation of Saccharidic Synthetic Antigens with Carrier Proteins by the Squaric Acid Method: Application as Biomarkers for Treatment Evaluation in Chagas Disease.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Variation in surface protein expression leads to heterogeneous Trypanosoma cruzi populations during host cell infection.Nature communications · 2025Article
- Detection of antibodies against the African parasite Trypanosoma brucei using synthetic glycosylphosphatidylinositol oligosaccharide fragments.Glycoconjugate journal · 2025Article
- The time has come for a vaccine against Chagas disease.Lancet regional health. Americas · 2025Review
- Review
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- Big is not better: Comparing two alpha-Gal-bearing glycotopes in neoglycoproteins as biomarkers for Leishmania (Viannia) braziliensis infection.Carbohydrate research · 2024Article
- An α-Gal antigenic surrogate as a biomarker of treatment evaluation in Trypanosoma cruzi-infected children. A retrospective cohort study.PLoS neglected tropical diseases · 2024Article
- Characterization of the major surface glycoconjugates of Trypanosoma theileri.Molecular and biochemical parasitology · 2023Article
- Guidelines for the purification and characterization of extracellular vesicles of parasites.Journal of extracellular biology · 2023Article
- Monocytes from Uninfected Neonates Born toPathogens (Basel, Switzerland) · 2023Article
- ASP-2/Trans-sialidase chimeric protein induces robust protective immunity in experimental models of Chagas' disease.NPJ vaccines · 2023Article
- Removal of natural anti-αGal antibodies elicits protective immunity against Gram-negative bacterial infections.Frontiers in immunology · 2023Article
- Antibody production and tolerance to the α-gal epitope as models for understanding and preventing the immune response to incompatible ABO carbohydrate antigens and for α-gal therapies.Frontiers in molecular biosciences · 2023Review
- State-of-the-Art in the Drug Discovery Pathway for Chagas Disease: A Framework for Drug Development and Target Validation.Research and reports in tropical medicine · 2023Review
- Serodiagnosis and therapeutic monitoring of New-World tegumentary leishmaniasis using synthetic type-2 glycoinositolphospholipid-based neoglycoproteins.Emerging microbes & infections · 2022Article
41 more citing papers are in PubMed but not listed here.
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
Sera of patients with chronic Chagas' disease (American trypanosomiasis) contain elevated levels of anti-alpha-galactosyl antibodies that are lytic to Trypanosoma cruzi. The T. cruzi trypomastigote F2/3 antigen complex recognized by these antibodies runs as a broad smear on SDS/PAGE [Almeida, Krautz, Krettli and Travassos (1993) J. Clin. Lab. Anal. 7, 307-316]. Treatment of T. cruzi trypomastigote cells with bacterial phosphatidylinositol-specific phospholipase C (PI-PLC) abolished most of their reactivity to chronic Chagas'-disease ((Chagasic, Ch) anti-alpha-galactosyl antibodies (anti-Gal). The F2/3 antigen complex, purified by solvent extraction and hydrophobic-interaction chromatography, contained 60% carbohydrate by weight and substantial amounts of Thr, Ser, Glx, Asx, Gly, Ala and Pro, but relatively few hydrophobic amino acids. The presence of myoinositol, ethanolamine and 1-O-hexadecylglycerol suggested the presence of glycosyl-phosphatidylinositol membrane anchors. This was confirmed by PI-PLC treatment, which rendered the F2/3 molecules hydrophilic and reactive to anti-(cross-reacting determinant) antibodies. The majority of the GlcNAc content of the F2/3 antigens was found at the reducing termini of oligosaccharides in O-glycosidic linkage to Thr residues. These O-linked oligosaccharides could be released by beta-elimination and by mild hydrazinolysis. The smallest released oligosaccharitol that was reactive with the Ch anti-Gal was Gal alpha 1-3Gal beta 1-4GlcNAcol (where GlcNAcol is N-acetyl-glucosaminitol). Several other Gal-containing oligosaccharitols were observed, most of which were branched and contained 4,6-di-O-substituted GlcNAcol at their reducing termini. About half of the total released oligosaccharitols could bind to immobilized Ch anti-Gal, but none of them bound to the anti-Gal isolated from normal human sera. These data suggest that the specificities of the Ch anti-Gal are quite different from the natural anti-Gal isolated from normal human sera. Therefore, these novel T. cruzi O-linked oligosaccharides are highly immunogenic under the conditions of natural infection and are the targets for lytic Ch anti-Gal.
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