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EuropePMC; 2021.
Preprint in English | EuropePMC | ID: ppcovidwho-306885


In 14 pregnant women who had asymptomatic or paucisymptomatic SARS-CoV-2 infection, we performed a detailed 38-parameter analysis of peripheral blood mononuclear cells by mass cytometry, studied the expression of T-cell master regular genes, investigated cell proliferation and cytokine production, and measured plasma levels of 62 cytokines. No patient showed lymphopenia or gross alterations of white blood cells. Unsupervised analyses revealed that most immune parameters were similar in patients and uninfected controls, apart from an increase in low density neutrophils in SARS-CoV-2 positive women. Also, patients did not show altered plasma levels of interleukin-6 or other main inflammatory molecules, but displayed significant increases of anti-inflammatory cytokines such as IL-1RA, IL-10 and IL-19, and decreased levels of IL-17, PD-L1 and D-dimer. The endogenous control of inflammation, as evidenced by plasma levels of soluble molecules, could be a strategy used during pregnancy to avoid virus-induced damages and maintain a normal immune response.

Nat Commun ; 12(1): 4677, 2021 07 29.
Article in English | MEDLINE | ID: covidwho-1387356


SARS-CoV-2 infection can affect all human beings, including pregnant women. Thus, understanding the immunological changes induced by the virus during pregnancy is nowadays of pivotal importance. Here, using peripheral blood from 14 pregnant women with asymptomatic or mild SARS-CoV-2 infection, we investigate cell proliferation and cytokine production, measure plasma levels of 62 cytokines, and perform a 38-parameter mass cytometry analysis. Our results show an increase in low density neutrophils but no lymphopenia or gross alterations of white blood cells, which display normal levels of differentiation, activation or exhaustion markers and show well preserved functionality. Meanwhile, the plasma levels of anti-inflammatory cytokines such as interleukin (IL)-1RA, IL-10 and IL-19 are increased, those of IL-17, PD-L1 and D-dimer are decreased, but IL-6 and other inflammatory molecules remain unchanged. Our profiling of antiviral immune responses may thus help develop therapeutic strategies to avoid virus-induced damages during pregnancy.

COVID-19/immunology , Cytokines/blood , Inflammation/immunology , Pregnancy Complications, Infectious/immunology , Pregnancy Complications, Infectious/virology , SARS-CoV-2/immunology , Adolescent , Adult , Asymptomatic Infections , Biomarkers/blood , COVID-19/blood , COVID-19/virology , Case-Control Studies , Cross-Sectional Studies , Cytokines/immunology , Female , Humans , Inflammation/blood , Inflammation/prevention & control , Inflammation/virology , Middle Aged , Pregnancy , Pregnancy Complications, Infectious/blood , SARS-CoV-2/isolation & purification , Young Adult