Publications by authors named "Héctor Cairoli"

4 Publications

  • Page 1 of 1

Blood neutrophils from children with COVID-19 exhibit both inflammatory and anti-inflammatory markers.

EBioMedicine 2021 May 9;67:103357. Epub 2021 May 9.

División Infectología, Hospital General de Agudos Dr. Juan A. Fernández, Av. Cerviño 3356, CABA C1425, Argentina.

Background: Perhaps reflecting that children with COVID-19 rarely exhibit severe respiratory symptoms and often remain asymptomatic, little attention has been paid to explore the immune response in pediatric COVID-19. Here, we analyzed the phenotype and function of circulating neutrophils from children with COVID-19.

Methods: An observational study including 182 children with COVID-19, 21 children with multisystem inflammatory syndrome (MIS-C), and 40 healthy children was performed in Buenos Aires, Argentina. Neutrophil phenotype was analyzed by flow cytometry in blood samples. Cytokine production, plasma levels of IgG antibodies directed to the spike protein of SARS-CoV-2 and citrullinated histone H3 were measured by ELISA. Cell-free DNA was quantified by fluorometry.

Findings: Compared with healthy controls, neutrophils from children with COVID-19 showed a lower expression of CD11b, CD66b, and L-selectin but a higher expression of the activation markers HLA-DR, CD64 and PECAM-1 and the inhibitory receptors LAIR-1 and PD-L1. No differences in the production of cytokines and NETs were observed. Interestingly, the expression of CD64 in neutrophils and the serum concentration of IgG antibodies directed to the spike protein of SARS-CoV-2 distinguished asymptomatic from mild and moderate COVID-19.

Interpretation: Acute lung injury is a prominent feature of severe COVID-19 in adults. A low expression of adhesion molecules together with a high expression of inhibitory receptors in neutrophils from children with COVID-19 might prevent tissue infiltration by neutrophils preserving lung function.

Funding: This study was supported by the Ministry of Science and Technology (National Agency for Scientific and Technological Promotion, IP-COVID-19-0277 and PMO BID PICT 2018-2548), and University of Buenos Aires from Argentina (20020170100573BA).
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May 2021

Patients assisted at the Department of Medicine of a pediatric hospital at the beginning of the COVID-19 pandemic in Buenos Aires, Argentina.

Arch Argent Pediatr 2020 12;118(6):418-426

Departamento de Medicina, Hospital General de Niños Pedro de Elizalde, Ciudad Autónoma de Buenos Aires, Argentina.

Introduction: Despite the magnitude of the COVID-19 pandemic, the information about its development in pediatrics is still limited. This report describes the characteristics of patients admitted to a children's hospital due to COVID-19 during the first three months of the pandemic.

Method: Descriptive study including all patients hospitalized due to COVID-19 between 4/1/2020 and 6/30/2020.

Results: A total of 191 patients were hospitalized due to COVID-19; their median age was 7.7 years; 89% had a history of close contact. Of them, 35.6 % were considered asymptomatic; 61.2 %, mild cases; and 3.2 %, moderate cases (no severe cases). None of them received a specific treatment for the disease. The most common symptoms were fever, sore throat, and cough. The median length of stay was 6 days.

Conclusion: A total of 191 cases of children and adolescents admitted due to COVID-19 are reported. Most were asymptomatic or presented with a mild disease.
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December 2020

[Gradenigo's syndrome: a case-report].

Arch Argent Pediatr 2010 Jun;108(3):e74-5

Clínica Pediátrica, Hospital Dr. Pedro de Elizalde.

Acute otitis media is the most common bacterial infection in children. Despite efficient antibiotic therapy, there are still reports of both intratemporal and intracranial complications with potential risk of high morbidity and mortality. Mastoiditis, apical petrositis and labyrinthitis are caused by the extension of purulent middle ear infection into nearby structures. Giuseppe Gradenigo first described the clinical triad of acute otitis media, unilateral pain in the region innervated by the 1 masculine and 2 masculine branches of the trigeminal nerve and ipsilateral abducens nerve paralysis. This is a serious but rare complication of middle ear infection that should be suspected in every patient with unilateral headache and abducens nerve palsy. We report a case of Gradenigo's syndrome in a 6-year-old boy.
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June 2010

[Nephromegaly: as unusual presentation of acute lymphoblastic leukemia in an infant].

Arch Argent Pediatr 2008 Jun;106(3):263-5

Hospital de Niños Dr. Pedro de Elizalde.

Nephromegaly in infancy may be due to several causes, being the most relevant: renal polycystic autosomic recessive disease, venous renal thrombosis, deposit diseases, kidney tumors, nephrotic congenital syndrome and neoplastic infiltration. Although renal infiltration is relatively frequent in acute lymphoblastic leukemia, nephromegaly is an unusual form of presentation in this pathology. The case of a four-year-old patient, who presents bilateral nephromegaly and pancytopenia, is presented. Acute Lymphoblastic Leukemia is diagnosed, initiating the corresponding chemotherapic treatment.
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June 2008