r.
Charles Nemeroff, a psychiatrist who specializes in the study
of depression, including its relationship to early trauma in
people’s lives, life events that may precede depression, and
the effects of antidepressant drugs, discusses his highly
cited papers in this interview with in-cites correspondent
Myrna Watanabe. A recent analysis of ISI
Essential
Science Indicators
Web product shows that Dr. Nemeroff had one paper with more
than 300 citations (315 to date) [C.B. Nemeroff, C.L. DeVane,
B.G. Pollock. "Newer antidepressants and the cytochrome
P450 system," American Journal of Psychiatry
153(3):311-320, 1996], two with more than 200 citations, six
with more than 100 citations, two with 50-99 citations, and
five with 10-46 citations. Dr. Nemeroff’s full citation
record includes 65 papers cited a total of 2,380 times to date
in the field of Psychiatry/Psychology and 78 papers cited a
total of 1,810 times to date in the field of Neuroscience
& Behavior. Dr. Nemeroff is an M.D. and a Ph.D. in
neurobiology. Both his doctoral degrees are from the
University of North Carolina. He is chairman of the Department
of Psychiatry and Behavioral Sciences at Emory University
School of Medicine in Atlanta, Georgia.
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Your most-cited paper in the last 10 years, which has been
cited 315 times, is a review article on the inhibition of P450 enzymes
by some classes of antidepressant drugs and the potential for drug
interactions. Why has this paper been cited so often?
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“Nanoscale technology considerably increases the successful development of chips for central nervous system implantation designed to regionally increase or decrease expression of specific genes.”
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At the time we wrote this manuscript, there was considerable
controversy about whether the inhibition of hepatic cytochrome P450
isoenzymes, such as cytochrome P450 2D6, by certain of the newer
generation of antidepressants, represented a significant, clinically
meaningful risk for drug-drug interactions. This review article
summarized the available data in the area.
In general, your papers are highly cited. Can you
explain why this is so?
Investigators, both basic and clinical, have different styles.
Some work in a single area for a lifetime. Others, like myself, are
blessed (or cursed) with a multitude of interests. I have,
therefore, published in a wide variety of areas in neuroscience and
psychiatry, ranging from the mechanism(s) of action of
antidepressant and antipsychotic drugs, to functional brain imaging
studies in patients with major psychiatric disorders, and clinical
treatment trials of novel agents in the management of mood
disorders. I have also been blessed with great students and
colleagues.
How did you become interested in studying depression?
After graduating from college, I accepted a position as a
research assistant in a laboratory at McLean Hospital, a psychiatric
hospital that served as a major teaching site in the Harvard system.
I was exposed to grand rounds and research seminars, as well as to
psychiatric patients.
How did you notice relationships between depression and major
illnesses or traumas in people’s lives?
While an inpatient-attending psychiatrist at Duke University
Medical Center in the early 1980s, I noted an inordinately high rate
of early-life trauma in patients in the hospital with a diagnosis of
major depression.
What do your colleagues tell you about the value of your work?
I am probably best known for conducting translational research, i.e.,
research at the interface of basic neuroscience and clinical
psychiatry, essentially from the bench to the bedside, before it was
fashionable.
Is there any one study, paper, or group of related papers you
have written or co-authored that you believe has been most influential
in your field? If so, which?
Our demonstration in rodents, nonhuman primates, and humans that
early-life trauma is associated with a multitude of persistent
neurobiological consequences that likely underlie the increased
vulnerability of child abuse victims to depression, anxiety, and
suicide throughout life will probably have the greatest impact on
the field. I am also particularly proud of the recently published
book, The Peace of Mind Prescription (Houghton Mifflin),
authored by Dennis Charney and me, which is a guide for patients and
families on the causes and treatment of mood and anxiety disorders.
What are you working on now?
Predictors of response to antidepressants, predictors of suicidal
behavior, CNS consequences of child abuse, and development of novel
antipsychotics and antidepressants.
How are newer molecular, microscale, or nanoscale technologies
affecting or going to affect your field?
As in all fields of medicine, new technologies provide tools that
allow questions to be answered that previously were unanswerable.
Such examples include functional brain imaging, the polymerase chain
reaction, siRNA, knockout and knock-in techniques, etc. The new
technologies listed in this question will likewise allow for major
new advances. Nanoscale technology considerably increases the
successful development of chips for central nervous system
implantation designed to regionally increase or decrease expression
of specific genes.
You are editor-in-chief of the journal Neuropsychopharmacology.
How have you influenced the journal?
I have been editor-in-chief for four years and, in that time, the
journal's impact factor has markedly improved; its impact factor is
5.2. In 2003, it was the fifth-ranked journal of 87 in Psychiatry,
23rd of 198 in Neuroscience, and 14th of 185 in Pharmacology &
Pharmacy. Our goal is to further improve this by maintaining our
high selectivity (high rejection rate) and minimal publication delay
after acceptance.
How do you find time to do research, edit a journal, and write
such important papers in your field?
I currently have, and have had in the past, fabulous
undergraduate, graduate, and medical students, residents, fellows,
junior and senior faculty, colleagues, and collaborators, both in my
own university and elsewhere, and a superb support staff. A great
team is essential for efficiency, but also for creativity and the
ability to turn "work" into fun. My wife, Gayle, and our
children, are wonderful in terms of understanding the professional
demands on my time.
What else about your career or papers would interest our
readers?
I began studying the hypothalamic-pituitary-adrenal (HPA) axis in
the late 1970s and early 1980s. Dwight Evans and I confirmed and
extended the observations of other researchers, showing that
depressed patients had hyperactivity of the HPA axis. The more
severe the patient’s depression, the greater was the HPA axis
hyperactivity. This could be quantified by measuring the amount of
the anterior pituitary hormone adrenocorticotropic hormone (ACTH) in
these patients’ blood samples. Once the hypothalamic peptide,
corticotropin releasing factor (CRF), which controls the secretion
of ACTH, was discovered, we found that CRF levels were higher in
cerebrospinal fluid that was taken via spinal tap from depressed
patients than they were in people who were not suffering from
depression. Antidepressant drugs normalize the levels of CRF.
Our laboratory has been studying the role of depression in the
etiology of disease, including coronary artery disease, stroke, and
breast cancer, among others.
For many years, I have been listed in the Best Doctors in
America. It is, perhaps, not generally known that I am quite active
in providing clinical services and see about ten patients per week.
Many of these are psychiatric patients referred to me by
psychiatrists in the Atlanta community and from throughout the U.S.,
whom I evaluate because they are treatment refractory to standard
treatments.
Charles B. Nemeroff, M.D., Ph.D.
Emory University
Atlanta, GA, USA
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