Category: Uncategorized

Boston University/Boston Medical Center CTSI Pilot Grant Awards Announced



August 19th, 2014 in Uncategorized

The recipients of the CTSI pilot grants for 2014 have been announced by BU Medical Campus Provost and BU School of Medicine Dean Karen Antman, MD.

Funding for these grants come entirely from BU, BMC and the VA this year for the first time, without relying on NIH funds, an accomplishment meeting the goals of the NIH’s CTSA program.

Eleven $20,000 grants support School of Medicine faculty, including seven funded by the School of Medicine four of which come from the Wing Tat Lee (WTL) endowment to promote School of Medicine and Chinese university collaborations, three by Boston Medical Center, and one by the VA Boston Healthcare System

Three $20,000 grants were funded by BU Henry M. Goldman School of Dental Medicine and nine grants totaling more than $90,000 were funded by BU School of Public Health.

The CTSI solicits pilot grant applications annually and are reviewed by panels of BU researchers. Between 2008 and 2013 the CTSI pilot award program, in collaboration with other BU/BMC schools, departments and centers, awarded more than $1.3 million to 55 investigators for 57 projects across five schools and 23 departments/sections. These pilot grants have led to 28 additional grants from external funders totaling more than $9.4 million, greater than a seven-fold return on investment-to-date.

 

Assumptions on Teen Sexual Activity Mean “Missed Opportunities” for HPV Vaccine

August 19th, 2014 in Uncategorized

Rebecca Perkins, MD, MSc, lead author of this study.

Rebecca Perkins, MD, MSc, lead author of this study.

Probing deeper into the complex decisions that parents and providers face regarding the human papilloma virus (HPV) vaccine, researchers found that though both parties appreciated importance of the HPV vaccine, their personal assumptions surrounding timing of administration relative to onset of sexual activity resulted in decreased vaccination rates.

Researchers at Boston University School of Medicine (BUSM) conducted hundreds of interviews to offer new insights into this frequent—and often controversial—clinic room conversation. Their findings and recommendations will appear in the September 2014 issue of Pediatrics.

Specifically, researchers found that vaccination rates could be traced to personal biases and communication styles of providers. Providers who believed a child was at low risk for sexual activity—an assessment, they admitted, not always accurate—were more likely to delay administration. Often, this deferred decision was never readdressed. Those with high vaccination rates approached HPV vaccines as a routine part of the age 11 vaccine bundle, unequivocally recommended it to parents, and framed the conversation as one about cancer prevention.

“Emphasis on cancer prevention and concurrent administration with other routine childhood vaccines has the potential to dramatically reduce missed opportunities occurring among well- intentioned providers and parents,” explained lead author Rebecca Perkins, MD, MSc, assistant professor of Obstetrics and Gynecology at BUSM and a gynecologist at Boston Medical Center.

The researchers interviewed 124 parents and 37 health-care providers at four clinics between September 2012 and August 2013. Parents and providers were asked to discuss their reasons why their HPV vaccine eligible girls did or did not ultimately receive the vaccine. Remarkably, the most common parental reason (44 percent) was that their child was never offered the vaccine. Other common reasons included the perception that the vaccination was optional instead of recommended or being told by their provider that it was unnecessary prior to sexual debut. Among those that declined the vaccine, the rationale often involved safety concerns and a belief that their daughters were too young to need it.

What is HPV?

A common and deadly cancer—12,000 women are diagnosed and 4,000 will die from it annually—cervical cancer is unique in that it is the only cancer that can be prevented by a vaccine. HPV causes not only cervical, vaginal and vulvar cancers in women, but penile cancers in men, as well as cancers of the mouth, tongue, tonsils and anus in men and women. The same viral strains are responsible for most of these cancers, and are covered by currently available vaccines.

Cervical cancer arises from abnormal cells on the cervix, known as cervical dysplasia; the majority of dysplasia arises from HPV strains numbered 16 and 18. The HPV vaccine, in turn, prevents 98 percent of cases caused by strains 16 and 18. Despite this evidence, HPV vaccination rates for girls lag far behind that of other types of vaccination; only 54 percent of eligible girls will ever get one of the three required doses, whereas only 33 percent will ever complete the entire sequence. This lag in uptake stems, in large part, from unfounded concerns about vaccine safety promulgated in popular media and, because HPV is transmitted sexually, parental / provider discomfort when contemplating a child’s future sexuality.  The HPV vaccine is currently recommended to be administered to girls and boys at ages 11-12, with catch-up vaccination through age 26 for girls and 21 for boys.

Funding for this study was provided by Centers for Disease Control and the American Cancer Society.

For the full findings of this study in Pediatrics: Missed Opportunities for HPV Vaccination in Adolescent Girls.

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Researchers Identify a Mechanism that Stops Progression of Abnormal Cells into Cancer

August 18th, 2014 in Uncategorized

Researchers from Boston University School of Medicine (BUSM) report that a tumor suppressor pathway, called the Hippo pathway, is responsible for sensing abnormal chromosome numbers in cells and triggering cell cycle arrest, thus preventing progression into cancer.

Although the link between abnormal cells and tumor suppressor pathways—like that mediated by the well known p53 gene—has been firmly established, the critical steps in between are not well understood.  According to the authors, whose work appears in Cell, this work completes at least one of the missing links.

Normal human cells contain 23 pairs of chromosomes, but this number doubles to 46 pairs as a cell prepares to divide. At the end of a normal cell division cycle, these chromosomes evenly divide to produce two identical cells with 23 pairs of chromosomes each. Sometimes, however, errors occur during division and cells fail to divide properly, resulting in giant cells with double the number of chromosomes, known as a tetraploid cells. Normally, p53 dependent pathways stop these tetraploid cells from proliferating. This response is critical because those tetraploid cells that escape detection can facilitate cancer development: Recent studies suggest that as many as 40% of all solid tumors have passed through a tetraploid stage at some point during their development. Thus, there has been great interest in understanding how a cell “knows” it has a tetraploid complement of chromosomes and is in need of tumor suppression.

Using a technique known as genome-wide screening, the scientists systematically depleted every human gene from tetraploid cells in order to discover which ones were important to prevent proliferation.  They found that when one specific gene, LATS2, was eliminated, the arrested tetraploid cells resumed proliferation, thus demonstrating that LATS2 was an upstream gene responsible for halting abnormal cell division. The LATS2 gene is known to activate the Hippo tumor suppressor pathway, which is the same pathway our bodies use to ensure our vital organs don’t grow out of control. Now, the authors demonstrate that the Hippo pathway also represents the underlying pathway that prevents tetraploid cells from proliferating and causing tumors. “Although more studies are needed to further clarify this critical pathway, this work may help guide the development of new therapies that specifically target tumor cells with abnormal numbers of chromosomes, while sparing the normal healthy cells from which they originated,” explained corresponding author Neil J. Ganem, PhD, Assistant Professor of Pharmacology and Medicine in the Shamim and Ashraf Dahod Breast Cancer Research Laboratories at BUSM.

Funding for this study was provided in part by a K99/R00 from the National Cancer Institute.

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Research from Boston and Duke Universities Offers New Hope for HIV Vaccine Development

August 15th, 2014 in Uncategorized

In a scientific discovery that has significant implications for HIV vaccine development, collaborators at the Boston University School of Medicine (BUSM) and Duke University School of Medicine have uncovered novel properties of special HIV antibodies. The paper, published in Cell Host and Microbe, describes how some HIV antibodies experience an unusual type of mutation, a phenomenon that allows them to neutralize many different strains of HIV. These antibodies are called “broadly neutralizing antibodies,” or BNAbs.

Antibodies develop from immune cells known as B cells. When B cells are confronted with foreign elements (known as antigens), some of them experience a high rate of mutations resulting in the substitution of an amino acid within the antibody for another. B cells whose antibodies carry variations that allow them to bind tightly with antigens proliferate, whereas those that do not die off. Thus, the immune system is able to adapt constantly by utilizing its own very fast version of evolution. More rarely, the antibodies will experience more dramatic changes than single amino acid substitutions. When whole strings of amino acids are inserted or deleted, this is known as an indel. Less than four percent of human antibodies contain indels; in BNAbs this figure is more than 50 percent. Only a small subset of HIV-infected individuals produce BNAbs.

Comparing the antibody genes of HIV infected and non-infected individuals, scientists discovered that HIV infected individuals had 27 percent more insertions and 23 percent more deletions than non-infected individuals. They also found this elevated rate of mutation persisted in all HIV-infected individuals, regardless of their ability to produce BNAbs. Most importantly, this high rate of indels was due to an overall increase in mutation frequency rather than something special associated with HIV itself, or unusual characteristics of the people who are able to make BNAbs. “This result suggests that a BNAb-eliciting vaccine is possible after all,” explained lead and corresponding author Thomas B. Kepler, PhD, professor of microbiology at BUSM. “More than 80 percent of indels were found in genetic regions responsible for binding to the HIV virus,” he added.

Since the BNAb indels don’t result from special characteristics of the people who make them, the researchers suspected that the indels may be important for the antibody function. They  studied one particular BNAb called CH31, which has a very large indel, to see what role these indels might have played in the acquisition of broad neutralizing activity. They found that the indel was the key event in the development of CH31. According to the researchers just putting the indel into antibodies that did not originally have it, increased its effectiveness eight-fold; taking it away from ones that did have it initially, made them much worse. “When tested on their ability to broadly neutralize HIV, only those CH31 antibodies with indels were able to accomplish the task,” said Kepler.

Barton Haynes, MD, director of the Duke Human Vaccine Institute and senior author noted, The more we understand about the unusual pathway the BNAbs take to develop, the better chance we will have in inducing them. This news study unravels a particularly complex BNAb pathway.”  The great hope in the quest to prevent HIV-1 is the development of a single vaccine that can cover multiple forms of HIV-1. A vaccine that works by eliciting BNAbs is a major goal, and this new work suggest that strategies for such a vaccine should focus on speeding up the antibody evolution that occurs after every immunization. The study suggests that such a strategy could work in everyone, not just a lucky few.

Other institutions involved in this study included the National Institute for Communicable Diseases, Sandringham, Johannesburg, South Africa; the Center for AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa; the Vaccine Research Center, NIAID, NIH, Bethesda, MD and Stanford University Medical Center, Stanford, CA

Funding for this study was provided by the National Institutes of Allergy and Infectious Diseases.

Common Chemical in Mothers May Negatively Affect the IQ of Their Unborn Children

August 14th, 2014 in Uncategorized

Elizabeth Pearce, MD, MSc, says this is concerning because perchlorate is everywhere.

Elizabeth Pearce, MD, MSc, says this discovery is concerning because perchlorate is everywhere.

In some women abnormally high levels of a common and pervasive chemical may lead to adverse effects in their offspring. The study, published recently in the Journal of Clinical Endocrinology & Metabolism, is the first of its kind to shed light on the possible harmful side effects of perchlorate in mothers and their children.

Using data from the Controlled Antenatal Thyroid Study (CATS) cohort, researchers at Boston University School of Medicine (BUSM) and Cardiff University studied the effect of perchlorate, an environmental contaminant found in many foods and in some drinking water supplies, and its effects on children born to mothers with above average levels of this substance in their system. They studied 487 mother-child pairs from women with underactive thyroid glands and in the 50 women with the highest levels of perchlorate in their body, their offspring had below average IQ levels when compared to other children.

“The reason people really care about perchlorate is because it is ubiquitous.  It’s everywhere,” said Elizabeth Pearce, MD, MSc, associate professor of medicine at BUSM. “Prior studies have already shown perchlorate, at low levels, can be found in each and every one of us.”

Perchlorate is a compound known to affect the thyroid gland, an organ needed to help regulate hormone levels in humans. According to Pearce previous studies have attempted to implicate this anti-thyroid activity in pregnant mothers as a possible cause of hypothyroidism, or an underactive thyroid gland. Hypothyroidism in newborns and children can lead to an array of unwelcome side effects, including below average intelligence.

Funding for the original CATS study was provided by the Wellcome Trust and Compagnia de San Paulo, Turin.

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A Gene That May Increase Alzheimer’s Disease Risk in African-Americans

August 12th, 2014 in Uncategorized

Researchers from Boston University School of Medicine (BUSM) report that two rare variants in the AKAP9 gene significantly increase the risk of Alzheimer’s disease (AD) in African-Americans.

This previously unknown association furthers the understanding of the role of genetic factors in the development of AD, according to the researchers, whose findings appear in Alzheimer’s & Dementia.

AD is the most frequent age-related dementia affecting 5.4 million Americans including 13 percent of people age 65 and older and more than 40 percent of people age 85 and older. Up to 75 percent of AD cases are thought to have a genetic basis; however the specific genes involved likely differ between ethnic populations.  The most well-known AD risk gene, APOE4, does not play as strong a role in AD risk in African Americans as it does in Caucasians, despite the fact that a higher proportion of African Americans than Caucasians are afflicted with this disorder.

BUSM's Dr. Lindsay Farrer is the senior author of the study.

BUSM’s Dr. Lindsay Farrer is the senior author of the study.

By analyzing the DNA sequence for all genes from participants of the Multi-Institutional Research on Alzheimer Genetic Epidemiology (MIRAGE) Study and Genetic and Environmental Risk Factors for Alzheimer’s Disease among African Americans (GenerAAtions) Study, researchers identified two genetic variants in AKAP9 unique to African Americans that are enriched in individuals with AD. They then confirmed this association in several thousand other African American subjects in the Alzheimer Disease Genetics Consortium dataset. Carriers of either of these AKAP9 variants have a respective 2.8 and 3.6 times greater risk of developing AD.

According to the researchers AKAP9 encodes a protein with multiple forms, One of these, AKAP450, is expressed in the brain and responsible for microtubule anchoring and organization.  Another protein, tau, which is responsible for microtubule functioning is well known to be the key constituent of neurofibrillary tangles that accumulate in AD brains.

“While further work is needed to clarify the causal link between these AKAP9 variants and AD, “this study indicates a new potential disease mechanism in the quest for a better understanding of AD, particularly in African Americans,” explained senior author Lindsay Farrer, PhD, Chief of Biomedical Genetics and professor of medicine, neurology, ophthalmology, epidemiology and biostatistics at BUSM. “Moreover, this is the first authentic example of rare genetic variants conferring a high risk of AD in African Americans,” he added.

Funding for this study was provided by the National Institute on Aging (R01-AG025259, R01-AG09029, P30-AG13846, and U01-032984).

Read the full study in Alzheimer’s & Dementia.

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BUMC Students to Enjoy Newly Renovated Space on 11th Floor Alumni Medical Library

August 7th, 2014 in Uncategorized

A recently completed renovation on the 11th floor of the Alumni Medical Library now provides a state-of-the-art, 220 seat testing center. The testing center is among the first of its kind, and will serve to both facilitate the administration of exams while at the same time enhancing the quality of study space for BUMC students.

Testing Center interior

Testing center interior

Renovations include a new ceiling with improved sound-proofing qualities, energy-efficient lighting, new carpeting and flooring, newly painted walls, new chairs and tables with power outlets at every seat, and club seating and cube tables in the hallway outside the floor-to-ceiling glass walls of the testing center. The heating and air conditioning system was upgraded, and a more powerful wireless system is provided throughout the testing center, as well as some wired network connections.

The testing center is equipped with a video monitoring system and an audio system for proctor announcements. During exams, proctors will have video monitoring controls to observe activity throughout the space via iPad. The testing center serves a dual-purpose as student study space when not reserved for exams.

Hall outside of Testing Center

Hall outside of testing center

Medical Library Computing & Systems offices are located on L-11, and staff will provide on-site technical support for student laptops and laptop loaners during exams. A new state-of-the-art computer classroom with 26 PCs will also serve as a public computing lab when classes and exams are not scheduled. A coffee/vending lounge includes additional club seating, group study tables, PCs, a scanner and print release station. The elevator lobby was renovated and a new LCD monitor and signage have been installed throughout the floor.

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BUSM Whitecoat Ceremony Photos on Facebook

August 5th, 2014 in Uncategorized

On Monday, Aug. 4,  members of the BUSM Class of 2018 received their white coats on Talbot Green.  View the pics on Facebook

whitecoat 2014

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BUSM Researchers Uncover New Possible Approach for Treating Schizophrenia

July 31st, 2014 in Uncategorized

Researchers at Boston University School of Medicine (BUSM) have uncovered important clues about a biochemical pathway in the brain that may one day expand treatment options for cognitive deficits seen in schizophrenia. The study, published online in the journal Molecular Pharmacology, was led by faculty members David H. Farb, PhD, Terrell T. Gibbs, PhD, and Shelley J. Russek, PhD in the department of pharmacology & experimental therapeutics at BUSM.

Courtesy

Courtesy

Patients with schizophrenia suffer from a life-long condition that can produce cognitive deficits, delusions, disordered thinking, and breaks with reality. A number of treatments are available for the treatment of schizophrenia, but many patients do not respond to these therapies or experience side effects that limit their use. There is no current treatment for the cognitive deficits experienced in schizophrenia.

The healthy brain is made up of billions of cells including the primary signaling cells called neurons, that are responsible for managing everything the body does: including movement, eating behavior, and memory formation. These neurons acts like a miniature computer and are controlled by substances called neurotransmitters that, like bits in a computer chip, may be “turned on” or “turned off” depending on the specific signals being integrated. Neurotransmitters latch onto a cell via a specific receptor, like a key fits into a lock.

In schizophrenia, it is thought that certain neurons don’t “turn on” as well when exposed to a certain neurotransmitter, the amino acid glutamate, may not be sensed by one of its key receptors (the NMDA receptor) whose diminished function may be the possible culprit for these sluggish cells. It is thought that this deficit can at least partially be responsible for symptoms seen in schizophrenics.

Currently the therapeutic means for making these cells more “sensitive” to glutamate can be toxic to the brain.

In this study, researchers discovered that another, naturally occurring steroid within the brain, known as PregS, may be able to bypass this toxic effect, and “turn on” neuron communication safely through a novel mechanism. The implication is that a deficit in the amount of this novel steroid may underlie deficits in signaling and that stimulation using therapeutics that elevate its levels in the brain may decrease or eradicate some of the debilitating symptoms seen in schizophrenia.

Although still in the early stages, further research in this area may be instrumental in the identification and development of treatments not only for schizophrenia, but also for other neurological conditions, such as age-related decreases in memory and learning ability.

View the full paper online: A Role for Picomolar Concentrations of Pregnenolone Sulfate in Synaptic Activity-dependent Ca2+ signaling and CREB Activation

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Saying Goodbye to BU’s Former “First Lady”

July 30th, 2014 in Uncategorized

Jasmine Chobanian remembered as a patron of the arts and a humanitarian.

Jasmine Chobanian with Aram Chobanian (left) and playwright Edward Albee at Commencement, May 2010. Photo by Kalman Zabarsky

Jasmine Chobanian with Aram Chobanian (left) and playwright Edward Albee at Commencement, May 2010. Photo by Kalman Zabarsky

Jasmine Chobanian, who was regarded as the “First Lady” of Boston University during the many years that her husband Aram V. Chobanian, MD, served in University leadership, both as dean of the School of Medicine and the ninth president of Boston University (2003–2005), died last Friday after a brief illness.

“Jasmine was our beloved first lady of the Medical Campus,” says Karen Antman, provost of the Medical Campus and dean of the School of Medicine. “She was a smart, savvy, warm person who started out life in the technical sciences but clearly also was deeply committed to the arts. We on the Medical Campus will miss her.”

Jasmine Chobanian was a much-loved patron of the arts and a humanitarian. She served on the board of trustees of Boston Ballet and was active in efforts to provide aid to the people of Armenia. In November 2005 the University’s Women’s Council announced the establishment of the Jasmine Chobanian Scholarship Fund and sponsored a gala honoring Chobanian for her many contributions to the University. Boston Ballet dancers Melanie Atkins, Pavel Gurevich, Roman Rykine, and Larissa Ponomarkenko performed selections from The Nutcracker, and then-provost David Campbell sang four lieder, accompanied by his wife, pianist Claude Hobson.

“Jasmine was a vivacious and caring emissary for Boston University, as she supported Aram in his roles as longtime dean of the School of Medicine and then president of Boston University,” says President Robert A. Brown. “The University has lost a true friend.”

A graduate of Brown University, Chobanian was a talented painter, and studied with Conger Metcalf at the Boston Museum School, now the School of the Museum of Fine Arts, Boston. She worked for many years as a researcher at Thorndike Memorial Laboratories at Boston City Hospital. Chobanian is being remembered by friends as someone who lived life to the fullest: a world traveler, voracious reader, fascinating raconteur, nature lover, bird watcher, and sports fan.

Caroline Apovian, professor of medicine and pediatrics at the School of Medicine, says Chobanian “was at the center of the movement on the Medical Campus to unite the arts and the sciences. She encouraged many of the faculty and students to pursue their creativity, specifically in music, but also in the other arts as well. She will be deeply missed by many.”

Robert Witzburg, associate dean and director of admissions at the School of Medicine says Jasmine Chobanian was a remarkably warm and caring person. “She had her own presence at BUSM and the University, quite independent of her prominent husband, Aram,” says Witzburg. “Her smile would light up a room, and she had that rarest of attributes: the ability to respect everyone she met and to instantly put them at ease. All of us who were privileged to know Jasmine will miss her dearly.”

Jasmine Chobanian was born in Pawtucket, R.I., the daughter of the late Charles and Zabel (Russian) Goorigian. She is survived by her husband of 59 years, Aram V. Chobanian (Hon’06), president emeritus of BU, and their children, Karin Chobanian Torrice of Natick, Mass., Lisa Chobanian Ramboeck of Bronxville, N.Y., and Aram Chobanian, Jr. of Brookline, Mass. She is also survived by her grandchildren, Marc and Vanessa Torrice; her sisters Nectar Lennox of Cumberland, R.I., and Marie Vartanian of Agawam, Mass.; and her sister-in-law, Ruth Chobanian of Cambridge, Mass., as well as a large number of nieces, nephews, and friends.

Funeral arrangements are being made through the Bedrosian Funeral Home, 558 Mt. Auburn Street, Watertown, Mass. A wake will be held at St. Stephen’s Armenian Church, 38 Elton Avenue, Watertown, Mass., tomorrow, Tuesday, July 29, from 4 p.m. to 8 p.m. Funeral services will take place on Wednesday, July 30, at 11 a.m. at St. Stephen’s Armenian Church. Burial services will be private.

In lieu of flowers, contributions may be made to the Chobanian Scholarship Fund at Boston University School of Medicine, c/o Development Office, 72 East Concord St., L219, Boston, MA 02118; St. Stephen’s Armenian Church; or The Fund for Armenian Relief, 630 Second Ave., New York, NY 10016. A memorial service to celebrate her life will be held in September at a date and place to be announced.

This BU Today story was written by Art Jahnke