Giacomo S. Frattari

ORCID: 0000-0001-7765-6428
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About
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Research Areas
  • SARS-CoV-2 and COVID-19 Research
  • HIV Research and Treatment
  • COVID-19 Clinical Research Studies
  • COVID-19 epidemiological studies
  • Immune Cell Function and Interaction
  • Cytomegalovirus and herpesvirus research
  • Vitamin C and Antioxidants Research
  • Hepatitis C virus research
  • T-cell and B-cell Immunology
  • Long-Term Effects of COVID-19
  • COVID-19 and Mental Health
  • MicroRNA in disease regulation
  • Bacteriophages and microbial interactions
  • RNA Interference and Gene Delivery
  • Monoclonal and Polyclonal Antibodies Research
  • Immunotherapy and Immune Responses

Aarhus University Hospital
2017-2023

Aarhus University
2023

BackgroundUpon SARS-CoV-2 infection, most individuals develop neutralizing antibodies and T-cell immunity. However, some reportedly remain PCR positive by pharyngeal swabs weeks after recovery. Whether viral RNA in these persistent carriers is contagious stimulates SARS-CoV-2-specific immune responses unknown.MethodsThis cohort study was conducted between April 3rd–July 9th 2020, recruiting COVID-19 recovered that were symptom-free for at least 14 days. We collected serum total Ig, IgA IgM...

10.1016/j.ebiom.2021.103230 article EN cc-by-nc-nd EBioMedicine 2021-01-30

This was an exploratory, single-arm clinical trial that tested the immune enhancement effects of 24-weeks Toll-like receptor 9 (TLR9) agonist (MGN1703; Lefitolimod; 60 mg × 2 weekly) therapy.We enrolled HIV-1-infected individuals on suppressive combination antiretroviral therapy. Safety assessed throughout study. The primary outcome reduction in total CD4 T-cell viral DNA levels. Secondary outcomes included safety, detailed immunological and virological analyses, time to rebound (viral load...

10.1097/qad.0000000000002213 article EN AIDS 2019-04-01

The SARS-CoV-2 pandemic currently prevails worldwide. To understand the immunological signature of infections and aid search evaluation new treatment modalities vaccines, comprehensive characterization adaptive immune responses towards is needed.

10.1016/j.ebiom.2021.103410 article EN cc-by-nc-nd EBioMedicine 2021-06-01

Human plasmacytoid dendritic cells (pDCs) play a central role in initiating and activating host immune responses during infection. To understand how the transcriptome of pDCs is impacted by HIV-1 infection exogenous stimulation, we isolated from healthy controls, people with (PWH) before toll-like receptor 9 (TLR9) agonist treatment performed single-cell (sc)-RNA sequencing. Our cluster analysis revealed four pDC clusters: pDC1, pDC2, cytotoxic-like an exhausted cluster. The inducible...

10.1016/j.isci.2023.107628 article EN cc-by iScience 2023-08-12

Abstract The SARS-CoV-2 pandemic currently prevails worldwide. To understand the immunological signature of infections and aid search for treatments vaccines, comprehensive characterization adaptive immune responses towards is needed. We investigated breadth potency antibody-, T-cell responses, in 203 recovered infected patients who presented with asymptomatic to severe infections. report very broad serological profiles cross-reactivity other human coronaviruses. Further, >99% had epitope...

10.1101/2020.10.08.331645 preprint EN cc-by-nd bioRxiv (Cold Spring Harbor Laboratory) 2020-10-09

Genetic polymorphisms at the IFNL4 loci are known to influence clinical outcome of several different infectious diseases. Best described is association between genotype and hepatitis C virus clearance. However, an on adaptive immune system was suggested by studies but never investigated in humans. In this cross-sectional study, we have genotyped 201 severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-positive participants for 3 (rs368234815, rs12979860, rs117648444) stratified them...

10.1089/jir.2021.0106 article EN Journal of Interferon & Cytokine Research 2021-11-01
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