Funding from the province of Ontario supports two new graduate students!

Bowdish lab receives funding from the province of  Ontario to train two new graduate students! Avee Naidoo (MSc) and Dessi Loukov, who will be starting a PhD in Sept 2013,  will be studying how age-associated inflammation predisposes older adults to pneumonia.

For full details on the award for Dawn’s proposal “Interplay between inflammation and impaired anti-bacterial immunity in the elderly.”
http://iidr.mcmaster.ca/IIDR-news/ERAs-2014.html#.UzXGj_ldWSo

Dessi Loukov, pictured here pushing back the boundaries of science.

Dessi Loukov, pictured here pushing back the boundaries of science.

Aveshni Naidoo, MSc sits beside the coolest jack-o'-lantern ever.

Aveshni Naidoo, MSc sits beside the coolest jack-o’-lantern ever.

Whelan et al. The Loss of Topography in the Microbial Communities of the Upper Respiratory Tract in the Elderly. Ann Am Thorac Soc. 2014 Mar 6.

Whelan FJ, Verschoor CP, Stearns JC, Rossi L, Luinstra K, Loeb M, Smieja M, Johnstone J, Surette MG, Bowdish DM. The Loss of Topography in the Microbial Communities of the Upper Respiratory Tract in the Elderly. Ann Am Thorac Soc. 2014 Mar 6.

This paper describes how the microbial communities of the anterior nares and nasopharynx change between adults and the elderly. 

“Myeloid-Derived Suppressor Cells, Age & Cancer” 2013. Oncoimmunology.

Dr. Bowdish discusses the implication of our Verschoor et al publication “Blood CD33(+)HLA-DR(-) myeloid-derived suppressor cells are increased with age and a history of cancer.” in studies of aging and cancer in the below commentary.

Click image for .pdf.

MDSC commentary

 

This is an open access publication so please feel free to use the following image in presentations/publications providing that it is properly referenced.

MDSC commen figure

“Immunosenescence & novel vaccination strategies for the elderly” 2013. Dorrington et al. Frontiers in Immunology

What is the best way to reduce infectious disease in the elderly? Vaccination! Unfortunately the aging immune system presents a number of challenges for vaccine development. Bowdish lab PhD candidate Mike Dorrington discusses them in this review and presents a case for developing novel vaccines that work within the constraints of the aging immune system.

Media coverage: This paper was picked up by MDLinx. See their coverage here.

Click image for .pdf.

Dorrington Fronteirs review

“Blood CD33+HLA-DR- myeloid-derived suppressor cells are increased with age and a history of cancer” 2013. Verschoor et al. JLB

MDSCs (myeloid derived suppressor cells) are a recently discovered and very heterogenous cell type that appear to directly suppress T cell responses and their presence in the tumour or the circulation is an extremely poor prognostic marker.

The Bowdish lab recently dipped our foot into the confusing world of MDSCs because we were curious to know whether their frequency increases with age and if so, could this explain why age is a risk factor for many cancers. They do increase with age and this may explain why some adaptive immune responses decline with age. One thing we were very surprised to find is that individuals who had any history of cancer but were believed to be in remission had higher levels of these cells in circulation. This begs the question – did these people have higher levels and to begin with and is this why they were predisposed to cancer? Or do they still have subclinical tumours that promote the development of MDSCs? Or does the suppressive environment of the cancer microenvironment stay with you for life? More studies (not by us, that was enough) are warranted.

For the .pdf click here

For the supplementary data, click here.

Dr. Dawn Bowdish receives a research award from the Ontario Lung Association and Pfizer Canada (and gets to attend a swanky event to receive it!)

Dawn was thrilled to attend the annual Breathe! gala event hosted as a fundraising event for the Ontario Lung Association to receive an award donated by Pfizer Canada and administered by the Ontario Lung association. Not only did it give her a chance to dress up and go out (a rare event!) for an evening of good food and drink but she was inspired to meet some of the spokespeople of the event, including Helene Campbell, who spent her time waiting for a double lung transplant starting an immensely successful social media campaign to increase organ donation, Ann Marie Cerato, a lung cancer survivor and Kayla Baker, a young sarcoidosis patient on a waiting list for a lung transplant. Not only was it inspiring to meet these brave, bold heroes but it was humbling to be in a room full of people whose lives were all touched by the research funded by the Ontario Lung Association.

Dawn standing beside the real heros of the event, Helene Campbell, double lung transplant recipient and idiopathic fibrosis patient, Ann Marie Cerato, lung cancer survivor and Kayla Baker sarcoidosis patient waiting for a lung transplant.

So what did Dawn win her award for? You can take a look at the YouTube video here or read on…

President of Pfizer Canada, John Helou (L) and Dr. John Granton, chair elect of the Ontario Lung Association (R) present Dr. Dawn Bowdish with the OLA-Pfizer Research Award.

Description of research funded by the Ontario Lung Association-Pfizer Ca award

neumonia is the sixth most common cause of death in Canada.  The incidence of pneumonia rises steeply in individuals over the age of 65 years and approximately 90% of deaths due to pneumonia occur in the elderly (>65 yrs).  Current prevention strategies are inadequate as the vaccination does not prevent pneumonia in most elderly individuals. Recent research from the Bowdish lab demonstrates that one of the reasons the elderly are so susceptible to pneumonia is that their immune systems cannot control the bacteria that normally live in our sinuses. The immune systems of healthy adults can keep the bacteria (Streptococcus pneumoniae) in the sinuses (“pneumococcal carriage”) and eventually clear them, but for reasons we don’t understand, the immune systems of the elderly cannot and as a result the bacteria break through the immune barriers of the sinuses and spread to the lungs, which results in pneumonia.

Although most people think that the elderly get sick because their immune systems “just don’t work”, in fact our data demonstrate that they recruit more white blood cells to the sinuses when they encounter the bacteria that cause pneumonia than healthy adults. Even though they have more white blood cells in the sinuses they don’t seem to be as good at recognizing and killing bacteria. Our goal is to figure out why they have overactive recruitment of white blood cells and why they aren’t as good at killing bacteria as white blood cells from healthy adults.

We have developed what we believe to be the world’s only Aged mouse model of colonization by pneumonia causing bacteria. This allows us to study how the immune system responds to the presence of bacteria in the sinuses in real-time. In addition we have a bank of white blood cells from adults and elderly patients that allow us to confirm the importance of our mouse studies in people.

Hospitalizations and deaths due to pneumonia are unacceptably high in the elderly. This is likely because vaccination of the elderly only does not protect against pneumonia. New methods for preventing infection are urgently required. Our recent data demonstrates that containment and clearance of pneumococcal carriage is impaired in age and results in increased susceptibility to pneumonia; however the mechanisms by which immune control of the sinuses fails remain to be discovered. Prevention of colonization of the sinuses will therefore be essential for control of pneumonia in this population. In order to develop novel therapeutic interventions for the elderly it will be necessary to discover the mechanisms by which bacterial recognition, killing are impaired in the sinuses.

Helene Campbell, conceivably, the most charming woman alive and the recipient of a double lung transplant, leads a dance with the Hon Deborah Mathews (MPP). The music failed so I held my iPod up to the Mike and we played Metric's "Sympathy".

Dr. Bowdish receives a CIHR Operating Grant from the Institute of Aging.

Dr. Bowdish’s grant, titled Macrophage function changes and contributes to susceptibility to infectious disease, was awarded $730,124 from the CIHR Institute of Aging.  This new grant will examine age-related changes in monocytes and macrophages to better understand aspects of aging that increase suceptibility to Streptococcus pneumoniae infection. This grant will likely allow Dr. Bowdish to hire a new post-doctoral fellow and graduate student. Interested applicants should consult the FAQ page.

MIRC scientists were highly successful in this recent round of CIHR funding (especially considering the low rates of funding!). To see who else got funded, click here.

 

 

Chris Verschoor & Alicja Puchta to attend the CIHR Summer Program in Aging.

Congratulations to Dr. Chris Verschoor and Alicja Puchta on being sponsored by the CIHR to attend their Summer Program in Aging.

The annual Summer Program in Aging (SPA) is designed to offer students and post-doctoral fellows involved in aging research, and those doing post-graduate clinical training that includes a program of research in aging, an advancd research training program that crosses disciplines, sectors, institutions and geography and that addresses one or more of the CIHR Institute of Aging’s research priorities in Fundamental research,Clinical research, Health services research and Social research.

Way to represent the Bowdish lab, Chris & Alicja!