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Home / Health / Covid-19 pandemic: Sex difference in immune response to coronavirus decoded

Covid-19 pandemic: Sex difference in immune response to coronavirus decoded

Women with COVID-19 mount a more robust and sustained immune response via the body’s T cells than men, according to a study that may help guide a sex-based approach to the treatment and care for those infected with the novel coronavirus.

health Updated: Aug 26, 2020 18:32 IST
Press Trust of India | Posted by: Alfea Jamal
Press Trust of India | Posted by: Alfea Jamal
New York
Amritsar: A medic collects a swab sample of a woman for COVID-19 test at Civil Hospital, in Amritsar, Wednesday, Aug. 26, 2020.
Amritsar: A medic collects a swab sample of a woman for COVID-19 test at Civil Hospital, in Amritsar, Wednesday, Aug. 26, 2020. (PTI)

Women with COVID-19 mount a more robust and sustained immune response via the body’s T cells than men, according to a study that may help guide a sex-based approach to the treatment and care for those infected with the novel coronavirus.

The research, published in the journal Nature, assessed 98 patients -- aged 18 years or over -- admitted to the Yale New Haven Hospital in the US with mild to moderate disease, who had confirmed positive tests for novel coronavirus infection.

While previous research had shown that the severity of COVID-19 tends to be higher for men than for women, the underlying reasons for this discrepancy has remained unclear, according to the scientists, including those from Yale University in the US. In the current study, they found that female patients mounted a more robust and sustained immune response via the body’s T cells than men. The researchers noted that T cells played an essential part in the immune system with their roles including the killing of infected cells. According to the scientists, including Akiko Iwasaki from the Yale University School of Medicine, poor T cell responses correlated with a worse disease outcome in male patients.

“We found that a poor T cell response negatively correlated with patients’ age, and was associated with worse disease outcome in male patients, but not in female patients,” the researchers wrote in the study.

Compared with healthy control individuals, they said patients with COVID-19 were found to have elevated levels of innate immune cytokines and chemokines, which are signalling molecules involved in the recruitment of immune cells to sites of inflammation.

However, the study noted that the levels of some of these molecules were higher in male patients than in female patients. In female patients, the scientists said, higher levels of the cytokine molecules were associated with a worse disease response. Based on the results, they said male patients may benefit from therapies that elevate T cell responses whereas female patients may benefit from therapies that dampen early innate immune responses. However, the scientists caution that they were unable to rule out other underlying factors that may modify the risk of poor outcome in male and female patients with COVID-19.

(This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.)

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