The influence of early-life gut microbiome disruption on HPA stress axisdysregulation and allergic asthma – Year two

Asthma affects 1 in 8 Canadian children and is the leading cause of pediatric hospitalizations with costs to Canadian health care
systems estimated to exceed 4.2Billion/year by 2030. While the causes are still debated, infant prematurity is a strong predictor for
asthma. The altered gut bacterial community (microbiome) in preemies is suspected to contribute to asthma susceptibility by
miscommunicating with regions of the brain that control stress and inflammation in the body, including microglia immune cells.
Malfunctioning microglia may thus contribute to stress and inflammation that leads to asthma.

Our project will examine the contributing role of microglia in controlling stress activity, immune development and functioning and
asthma susceptibility of newborn mice, by altering their microbiome using early-life chronic stress, antibiotics and preemie fecal transplant exposures. Microglia will also be genetically target-eliminated to verify their critical function in stress-mediated asthma
activation. Finally, we will also examine the therapeutic potential for probiotics developed by Lallemand Health Solutions to repair
microglia and prevent asthma by normalizing the microbiome and the communication pathways to the brain.

Our results will provide Lallemand with important therapeutic information about their probiotics to ameliorate stress pathways and
asthma, which will help them improve and develop targeted probiotic formulations.

Faculty Supervisor:

Marie Arrieta

Student:

Partner:

Lallemand Bio Ingredients;Lallemand Health Solutions Inc (Montreal, QC)

Discipline:

Life Sciences

Sector:

Agriculture; Manufacturing; Professional, scientific and technical services

University:

University of Calgary

Program: