Viral Metagenomics in HSCT Patients: A Brazilian Study
Author Information
Author(s): Gabriel Montenegro de Campos, Thalita Cristina de Mello Costa, Roberta Maraninchi Silveira, Ian Nunes Valença, Rafael dos Santos Bezerra, Luiz Guilherme Darrigo Junior, Ana Carolina de Jesus Vieira, Camila Campos Mesquita, Patrícia da Silva Laurindo, Renato Guerino Cunha, Simone Kashima, Dimas Tadeu Covas, Belinda Pinto Simões, Sandra Coccuzzo Sampaio, Maria Carolina Elias, Marta Giovanetti, Svetoslav Nanev Slavov
Primary Institution: University of São Paulo
Hypothesis
The study aims to assess changes in viral abundance and detect clinically significant viruses in allogeneic HSCT patients using next-generation metagenomics.
Conclusion
The study found that the abundance of anelloviruses increased significantly after allogeneic HSCT, with critical viral reactivations occurring around 30 days post-transplant.
Supporting Evidence
- Viral infections are significant causes of morbidity and mortality in HSCT patients.
- Anelloviruses showed increased abundance and diversity at D + 100 post-transplant.
- CMV and EBV were confirmed in individual samples, with CMV being most prevalent at D + 30.
- Adenovirus type 7 was detected exclusively at D + 30.
- Monitoring of viral loads can help manage infections in immunocompromised patients.
Takeaway
Doctors studied blood samples from patients who had a stem cell transplant to see how viruses changed over time, finding that some viruses became more common after the transplant.
Methodology
Next-generation sequencing and metagenomic analyses of plasma samples were performed at three time points: pre-transplantation, 30 days post-transplantation, and 100 days post-transplantation.
Potential Biases
The heterogeneity of clinical conditions and treatment regimens among patients may introduce confounding factors.
Limitations
The small sample size and the pooling of plasma samples limited the ability to obtain individualized data on viral presence and abundance.
Participant Demographics
60% male, 40% female, median age 38.85 years (range 18–66).
Statistical Information
P-Value
0.3679
Statistical Significance
p=0.3679
Digital Object Identifier (DOI)
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