Start: June 2016
End: May 2020
Why do we need this research?
Sepsis is a life-threatening condition caused by an extreme reaction by the body to an infection. Sepsis during pregnancy and shortly after birth is the leading cause of maternal death in the UK. Research has shown that pregnant women are more vulnerable to infections, and more likely to suffer severe complications, but we don’t know why.
We need to better understand how a woman’s immune system changes during pregnancy so that we can treat infections better and prevent mothers from dying.
What’s happening in this project?
Researchers funded by Tommy’s have been studying a molecule called Toll-like receptor 9 – or TLR9 for short. TLR9 sits on the surface of immune cells, and helps the immune system to recognise common infections, such as the viruses that can cause flu or herpes, or DNA from bacteria.
By studying blood samples from pregnant women in their third trimester, the team found that a certain type of immune cell has less TLR9, compared to non-pregnant women. They also found in these women that the immune system doesn’t respond in a normal way to bacterial DNA. Our researchers are currently investigating why this is the case, and why TLR9 is reduced in pregnant women.
What difference will this project make?
The results of this project suggest that the immune system is dampened during the third trimester of pregnancy. This could explain why pregnant women are more susceptible to infections and life-threatening sepsis. Ultimately, this research could lead to new ways to treat infections and sepsis in pregnant women, and help to prevent maternal death.
Get our research updates
Tommy's funds research across the UK investigating the reasons for pregnancy complications and loss. If you're interested in being kept updated about our research and news from Tommy's, click here.
Tommy’s has received a grant from the UK Government’s Department for Health and Social Care to support the costs of its PregnancyHub information and support services throughout the summer, due to rising demand in the wake of coronavirus.
Although recruitment to some clinical trials had to be paused when coronavirus hit the UK, scientists at Tommy’s Research Centres across the UK are still hard at work, supporting women and families in our specialist clinics and sharing their latest studies with academic journals.
The day before Mother’s Day, and two days before the UK officially went into coronavirus lockdown, Zara Dawson found out she was having a miscarriage. Her third consecutive miscarriage in less than a year, and fourth consecutive loss, after losing her second son Jesse in 2018 to termination for medical reasons.
As research shows half of UK mums are experiencing mental health problems in coronavirus lockdown, we've joined forces with Elvie on #TheBigSqueeze campaign to help Tommy's midwives continue to provide their vital support virtually during the pandemic.