Presentation on theme: "Stem Cells for Heart Disease: hype or hope Robert M. Graham Victor Chang Cardiac Research Institute and St Vincent’s Hospital, Sydney, Australia Australian."— Presentation transcript:
Stem Cells for Heart Disease: hype or hope Robert M. Graham Victor Chang Cardiac Research Institute and St Vincent’s Hospital, Sydney, Australia Australian Health Insurance Association Conference 31 Oct - 2 Nov, 2006
1 November, 2006
Cardiology – where have we been?
Cardiology: Where have we been? In ~ 400B.C., the time of Hippocrates, air and water were pushed through hollow reeds or brass pipes into the aortas of cadavers in an attempt to understand the function of the heart valves. In 1651 Harvey inserted tubes into cadavers and proved, contrary to popular opinion, that blood in the veins flowed up to the lungs, and not down into the legs.
Cardiology: Where have we been? Wren delivered the first injection into a vein of a living subject (a dog) in 1665 Major delivered the first injection into the vein of a living human in 1667 Also in 1667, Lower used the first catheter - a man made tube inserted into the body to transfuse blood from a sheep to a human
Earliest known cardiac catheterisations were performed by Hales in 1711 – inserting brass pipes through the veins and arteries into the hearts of horses. Using the wind-pipes of geese as a connector, the brass pipes were connected to glass tubes to measure pressure – the water columns rose to >9 feet.
The first human catheterisation Werner Forssmann ( ) As a 25yo medical resident wanted to give drugs directly to the heart Superiors “horrified” – thought that any invasion of the heart would be fatal – refused to allow this research Practiced passing bladder catheters into the hearts of cadavers “Gained the trust” of Gerda Ditzen, a surgical nurse, who had access to the necessary equipment
The first human catheterisation In July of 1929, Ditzen (the surgical nurse) agreed to permit Forssmann to perform the first human catheterisation on her Forssmann secured her to the operating table He then put local anaesthetic in his own forearm and passed a bladder catheter to its full length of 65cm up his own arm He then released the angry nurse and together they walked to the radiology department (up the stairs!) and made medical history
The first human catheterisation Bitter criticism followed – Forssmann described by peers as “mentally deficient” Fired by his superior the same day, and told “such methods are fit for a circus, but not for a respected hospital” Abandoned cardiac research within 2 years, finally becoming a urological surgeon Awarded the 1956 Nobel prize with other cardiac poineers, Cournard and Richards
On February 12 th 1974, Andreas Gruentzig performed the first balloon dilation of a human leg artery, and in 1977 this was then done in the human heart.
Other important recent advances in cardiology Coronary artery bypass surgery Awareness of the importance of diet, smoking (not!), lifestyle and exercise Medical therapies – aspirin, blood pressure lowering drugs, cholesterol lowering tablets etc. Coronary care units Cardiac transplantation
Cardiology – where are we going? Stem cell research – future directions for heart disease treatment
The hound of Zeus, the tawny eagle, …feasting on thy liver Till he hath gnawn it black. - Aeschylus, Prometheus Bound Prometheus, who was damned to be chained to Mount Caucasus for 30,000 years. Every day an eagle would come down and pick his liver, and the next day it would have regenerated.
Are there stem cells in the heart? Old way of thinking = –The heart can not repair itself –After a heart attack, dead heart cells are not replaced
There are stem cells in the heart!
What do heart stem cells do? Human heart contains ≈ 5,000,000,000 cells 3,000,000 cardiac cells become worn out and die each day The heart would disappear in ≈ years if these cells were not replaced!
Heart stem cells may multiply after a heart attack
Blood vessel stem cells are also important
Heart and blood vessel stem cells We all have them They probably help to fix everyday wear-and-tear Heart stem cells try to fix things after a heart attack – but don’t do enough! Our job is to find out why they don’t do much after a heart attack and see what helps them do more
Research using stem cells in humans
Research using stem cells in human hearts Already over 500 patients around the world have had stem cell therapy to the heart Many cell types have been used –Bone marrow –Muscle stem cells –Blood vessel stem cells Many different heart problems have been treated –Days after a heart attack –Years after a heart attack –Reduced pumping of the heart (never had a heart attack)
POSITIVE BORDERLINE NEGATIVE
Stem cell trial at St Vincent’s Hospital and The Victor Chang Cardiac Research Institute Granulocyte-colony stimulating factor (G-CSF) and intra- coronary endothelial progenitor cell (EPC) infusion in patients with chronic refractory ischaemic heart disease
The stem cell team VCCRI cardiac stem cell lab Richard Harvey Joan Li Corey Heffernan Owen Prall Ish Ahmed Robert Graham Clinical trial at SVH and VCCRI Investigators David Muller Peter Macdonald Michael Feneley Neil Jacobs Helen Tao Andrea Herbert David Ma John Moore Sam Milliken Anthony Dodds Judy Freund Lyn Chan Silviu Itescu Robert Graham Data and Safety Monitoring Board Roger Allan John Rasko Vivian Fernandez
G-CSF Typically used for bone marrow donation or transplantation Given by daily skin injection for 3-5 days Stimulates bone marrow and causes release of stem cells into the blood Normal BM BM after 5 days G-CSF
Age Sex Body mass index Diabetes High cholesterol High blood pressure Smoking Family history (1 st degree relative < 55 male or < 65 female) Number of bypass operations Number open bypass grafts Number of open heart arteries Pumping ability of the heart (LVEF) Number of cardiac tablets per day 62 ± 9.0 ( ) Male = 18/20, female = 2/ ± 4.4 ( ) 3/20 20/20 18/20 17/20 ex, 0/20 current 15/ ± 0.7 (1 - 3) 1.5 ± 1.0 (0 - 4) 0.7 ± ± 10.3% ( %) 8.7 ± 1.4 Data presented as mean ± SD (range), or number of patients/20
Final trial results and future directions Safe Less chest pain Less use of medications to get rid of chest pain Exercise time on the treadmill improved Quality of life improved On the basis of this small study of 20 patients, and with support from MBF, we are already in the advanced planning stages for a larger study
Stem cell research – future directions for heart disease treatment Important new knowledge about stem cells and the heart and vessels It is definitely possible to put stem cells into the human heart Over 500 patients have already had this around the world in research studies Although stem cells are exciting, we have a long way to go! –It took over 200 years from the first horse catheterisation in 1711 until the first human catheterisation in It’s only taken <5 years since heart stem cells were discovered to do the first human studies