Category Archives: Health Care

DeRemer named GSHP Practitioner of the Year

David DeRemer, a Pharmacy Clinical Specialist at the Georgia Regents University Cancer Center, has been named 2012 Practitioner of the Year by the Georgia Society of Health-System Pharmacists.

DeRemer has been a hematology/oncology pharmacy clinical specialist for the Bone Marrow Transplant program since joining the health system at GRU in 2005. DeRemer is also a Clinical Associate Professor in the University of Georgia’s College of Pharmacy and serves as post-graduate year two oncology residency program director for GRU-UGA.

He earned his Doctor of Pharmacy from the University of Kentucky in 2002 and completed both a pharmacy practice residency and a hematology/oncology specialty residency at UK Medical Center. DeRemer completed a one-year oncology fellowship with emphasis in drug discovery and development at the UK College of Pharmacy.

His teaching, clinical service and scholarship interests include drug research, hematological malignancies, bone marrow transplant and supportive care. In addition to GSHP, he is a member of the Hematology Oncology Pharmacy Association, the American Society for Blood and Marrow Transplantation, American College of Clinical Pharmacy and the American Society of Health System Pharmacists.

Coroners Symposium slated for Jan. 25 at GRU

Georgia Health Sciences Medical Center’s Tissue Donor Services and the Georgia Coroners Association, District 2, are teaming up for the third annual Coroners Symposium from 8 a.m. to 5 p.m. Friday, Jan. 25 in the Natalie and Lansing B. Lee Jr. Auditoria Center at Georgia Regents University.

About 100 coroners, deputy coroners and law enforcement officials will participate in this free continuing-education event featuring keynote speaker Joseph Scott Morgan, a criminal justice and forensic professor and author of the book Blood Beneath My Feet: The Journey of a Southern Death Investigator.

Other presenters include Dan Hillman, Executive Director of Child Enrichment, Inc., who will discuss how to recognize maltreatment of children. Eric Emery, Medicolegal Operations Consultant for the National Transportation Safety Board, will speak on mass fatalities and disaster victim recovery; and the Rev. Brennan Francois, a chaplain at Georgia Health Sciences Medical Center and a motivational speaker, will talk about making a difference in the midst of tragedy.

The symposium provides valuable training to the coroners who participate, while also raising awareness about organ and tissue donations.

“One tissue donor can enhance the lives of more than 50 people,” said Carl Eubanks, Director of Tissue Donor Services at GHS Medical Center. “Coroners work with families who’ve lost loved ones. If they can broach the subject of organ donation with the families they encounter, perhaps these families will choose to give the gift of life to another, and maybe experience a touch of hope during their loss.”

For more information about the symposium, call Eubanks at 706-533-4210, or Augusta-Richmond County Chief Deputy Coroner Mark Bowen at 706-821-2383.

Eliminating useless information important to learning, making new memories

Dr. Joe Tsien
Dr. Joe Tsien

AUGUSTA, Ga. – As we age, it just may be the ability to filter and eliminate old information – rather than take in the new stuff – that makes it harder to learn, scientists report.

“When you are young, your brain is able to strengthen certain connections and weaken certain connections to make new memories,” said Dr. Joe Z. Tsien, neuroscientist at the Medical College of Georgia at Georgia Regents University and Co-Director of the GRU Brain & Behavior Discovery Institute.

It’s that critical weakening that appears hampered in the older brain, according to a study in the journal Scientific Reports.

The NMDA receptor in the brain’s hippocampus is like a switch for regulating learning and memory, working through subunits called NR2A and NR2B.  NR2B is expressed in higher percentages in children, enabling neurons to talk a fraction of a second longer; make stronger bonds, called synapses; and optimize learning and memory. This formation of strong bonds is called long-term potentiation. The ratio shifts after puberty, so there is more NR2A and slightly reduced communication time between neurons.

When Tsien and his colleagues genetically modified mice that mimic the adult ratio – more NR2A, less NR2B – they were surprised to find the rodents were still good at making strong connections and short-term memories but had an impaired ability to weaken existing connections, called long-term depression, and to make new long-term memories as a result. It’s called information sculpting and adult ratios of NMDA receptor subunits don’t appear to be very good at it.

“If you only make synapses stronger and never get rid of the noise or less useful information then it’s a problem,” said Tsien, the study’s corresponding author. While each neuron averages 3,000 synapses, the relentless onslaught of information and experiences necessitates some selective whittling. Insufficient sculpting, at least in their mouse, meant a reduced ability to remember things short-term – like the ticket number at a fast-food restaurant – and long-term – like remembering a favorite menu item at that restaurant.  Both are impacted in Alzheimer’s and age-related dementia.

All long-term depression was not lost in the mice, rather just response to the specific electrical stimulation levels that should induce weakening of the synapse. Tsien expected to find the opposite: that long-term potentiation was weak and so was the ability to learn and make new memories. “What is abnormal is the ability to weaken existing connectivity.”

Acknowledging the leap, this impaired ability could also help explain why adults can’t learn a new language without their old accent and why older people tend to be more stuck in their ways, the memory researcher said.

“We know we lose the ability to perfectly speak a foreign language if we learn than language after the onset of sexual maturity. I can learn English but my Chinese accent is very difficult to get rid of. The question is why,” Tsien said.

Tsien and his colleagues already have learned what happens when NR2B is overexpressed. He and East China Normal University researchers announced in 2009 the development of Hobbie-J, a smarter than average rat. A decade earlier, Tsien reported in the journal Nature the development of a smart mouse dubbed Doogie using the same techniques to over-express the NR2B gene in the hippocampus.

Doogie, Hobbie-J and their descendants have maintained superior memory as they age. Now Tsien is interested in following the NR2A over-expressing mouse to see what happens.

Tsien is the Georgia Research Alliance Eminent Scholar in Cognitive and Systems Neurobiology. The research was funded by the National Institutes of Health and the GRA.