Faculty Bibliography

BACKGROUND: The indications for deep brain stimulation (DBS) are expanding, and the feasibility and efficacy of this surgical procedure in various neurologic and neuropsychiatric disorders continue to be tested. This review attempts to provide background and rationale for applying this therapeutic option to obesity and addiction. We review neural targets currently under clinical investigation for DBS-the hypothalamus and nucleus accumbens-in conditions such as cluster headache and obsessive-compulsive disorder. These brain regions have also been strongly implicated in obesity and addiction. These disorders are frequently refractory, with very high rates of weight regain or relapse, respectively, despite the best available treatments. METHODS: We performed a structured literature review of the animal studies of DBS, which revealed attenuation of food intake, increased metabolism, or decreased drug seeking. We also review the available radiologic evidence in humans, implicating the hypothalamus and nucleus in obesity and addiction. RESULTS: The available evidence of the promise of DBS in these conditions combined with significant medical need, support pursuing pilot studies and clinical trials of DBS in order to decrease the risk of dietary and drug relapse. CONCLUSIONS: Well-designed pilot studies and clinical trials enrolling carefully selected patients with obesity or addiction should be initiated.

BACKGROUND: Transmission of human immunodeficiency virus and hepatitis C to transplant recipients has drawn attention of the use of allografts from seronegative donors at increased risk for blood-borne viral infection (DIRVI). METHODS: We performed a cohort study of 7803 kidney transplant recipients whose kidneys were recovered through one of two organ procurement organizations from 1996 to 2007. Detailed organ procurement organization data on donor risk factors were linked to recipient data from the Organ Procurement and Transplantation Network. RESULTS: Median recipient follow-up was 3.9 years. Three hundred sixty-eight (5%) patients received DIRVI kidneys, a third of which were procured from donors with a history of injection drug use or commercial sex work. Compared with standard criteria kidney recipients, DIRVI kidney recipients were more likely to be human immunodeficiency virus positive or black. In multivariable Cox regression, using DIRVI recipients as the reference, recipients of standard criteria donor kidneys had lower mortality (hazard ratio [HR] 0.71, P<0.01) and no difference in death-censored allograft failure (HR 1.09, P=0.62), whereas recipients of expanded criteria donor kidneys had no significant difference in mortality (HR 0.98, P=0.83) but a higher allograft failure rate (HR 1.93, P<0.01). High-quality data on posttransplant recipient viral testing were not available. CONCLUSIONS: DIRVI kidney recipients experienced higher mortality than standard criteria kidney recipients. This finding could be explained if sicker patients received DIRVI kidneys (i.e., residual confounding) or the less likely possibility of undetected transmission of viral infections. Given the limitations of registry data used in this analysis, prospective studies are needed to further elucidate these findings.

The term evidence-based medicine is overused, abused, and is beginning to ring hollow. It is not that evidence (or at least of what most people in biomedicine think evidence-based medicine should strive to be) is a bad thing. Rather, there is more rhetoric about evidence than there is actual evidence to support the degree of talk.

The movement to try to close the ever-widening gap between demand and supply of organs has recently arrived at the prison gate. While there is enthusiasm for using executed prisoners as sources of organs, there are both practical barriers and moral concerns that make it unlikely that proposals to use prisoners will or should gain traction. Prisoners are generally not healthy enough to be a safe source of organs, execution makes the procurement of viable organs difficult, and organ donation post-execution ties the medical profession too closely to the act of execution.

Among the obstacles to the success of vaccination programs is the apparent recent increase in hesitancy and outright resistance to the recommended vaccination schedule by some parents and patients. This article reviews the spectrum of patient or parental attitudes that may be described as vaccine refusal, explores related ethical considerations in the context of the doctor-patient relationship and public health, and evaluates the possible responses of physicians when encountering resistance to vaccination recommendations. Health care providers should view individuals hesitant about or opposed to vaccines not as frustrations or threats to public health, but as opportunities to educate and inform.