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Hello to all! We are proud to announce the return of Living with Schizophrenia after a long hiatus. If you haven't visited Schizophrenia.com in a while, you might want to check out our new discussion pages, search engine, and book reviews. Below you will find news highlights from this spring and early summer, and we will continue to keep you updated of new developments on a regular basis. We hope you find these articles informative and pertinent, and welcome your questions or comments. You can email us at szwebmaster@yahoo.com. Enjoy!
1. Father's Age Linked to Risk of Schizophrenia 2. Fourth Edition of Surviving Schizophrenia Published 3. Viral Genetic Material found in Cerebrospinal Fluid of Some Schizophrenics 4. Clinical Trials of Third-Generation Anti-Psychotic Look Promising 5. Ken Steele's Autobiography Released 6. Protein Model Points to Smoking, Alzheimers, and Schizophrenia Drugs 7. Dopamine-Dampening Gene Linked To Prefrontal Inefficiency, Schizophrenia 8. Oxygen
Shortage at Birth Linked to Schizophrenia
Father's
Age Linked to Risk of Schizophrenia By ERICA GOODE The
risk of having a child with schizophrenia may increase with a father's
"The finding is a very strong association of schizophrenia risk and
Other scientists were more skeptical. They noted that confirmation through other
studies was needed before such a link could be said to be
If the results of the study hold up to scrutiny, Dr. Malaspina said, "The
A number of physical illnesses and birth defects have been linked to
The illness runs in families, and is known to have a strong genetic
But other scientists cautioned that other explanations beside spontaneous
genetic mutation could also account for the study's results. For example,
said Dr. Ann Pulver, director of the epidemiology and genetics program in
psychiatry at Johns Hopkins University, "It may be that the fathers of
schizophrenics have unusual characteristics that delay reproduction."
In the study, Dr. Malaspina and her colleagues took advantage of the
Surviving Schizophrenia, 4th edition E. Fuller Torrey, M.D. New York: HarperCollins, 2001, $15. The fourth edition of Surviving Schizophrenia: A Manual for Families, Consumers and Providers was published in May by HarperCollins. It is completely revised and updated. It includes information on all the new antipsychotics (except that the trade name of ziprasidone was changed from Zeldox to Geodon after the book went to press), as well as new information that has not been widely publicized, e.g., why pregnancies increase when women switch from first-generation (typical) to second-generation (atypical) antipsychotics, and why drinking coffee increases and smoking decreases the blood levels and thus the effectiveness of clozapine and olanzapine. The book also includes the latest research findings on the causes of schizophrenia and a comparison of schizophrenia with manic-depressive illness (bipolar disorder). Also included are summaries of 9 commercial films portraying individuals with schizophrenia, evaluations of the 9 best websites for information on schizophrenia, and summaries of 18 good videotapes and 50 useful books on this disease. Finally, Dr. Torrey summarizes his nominations for "the 15 worst books on schizophrenia." "It's getting harder to find worthy additions to this list," he told the Advocate. "This is a sign that the field is moving forward." Surviving Schizophrenia is available through your local bookstore and can also be ordered over the Internet at Amazon.com, BarnesandNoble.com, and Borders.com. Check out the book review at http://www.schizophrenia.com/bookreviews/survschizreview.html
The Washington Post, April 10, 2001 Bits of genetic code resembling viral genes were found in the cerebrospinal fluid and brain tissue of schizophrenics in a study released yesterday that provides new evidence a virus may contribute to some cases of the devastating mental illness. A research team led by a Johns Hopkins School of Medicine scientist examined a group of 35 Germans who had been diagnosed with schizophrenia. The researchers found the molecular "footprint" of a retrovirus in the cerebrospinal fluid of 29 percent of subjects with newly diagnosed acute schizophrenia. It also was found in 7 percent of those with a chronic form of the disease. In contrast, the retroviral genes were not present in the brains or cerebrospinal fluid of healthy people examined or people with other types of neurological illnesses. The researchers said the greater frequency of retroviral genes found in patients with newly diagnosed instead of chronic schizophrenia hinted that the activation of these genes may contribute to the onset and initial progression of the disease in some individuals. The study appears in the Proceedings of the National Academy of Sciences.
PRINCETON,
N.J., and TOKYO, May 8, 2001 According
to a new study presented today, aripiprazole, under development as a once-daily
novel antipsychotic, is significantly better than placebo in controlling the
positive and negative symptoms of schizophrenia. The study also showed
that risperidone is better than placebo in controlling positive and negative
symptoms. In addition, the side effect profile of aripiprazole in this
study was very favorable. Specifically, in this study: --
As with other Phase II and III clinical trials of aripiprazole, only a
-- Mean change from baseline QTc was not statistically different in
patients taking aripiprazole compared to placebo.
-- Aripiprazole did not increase prolactin levels. In contrast,
-- As with other phase II and Phase III studies of aripiprazole, there
-- Aripiprazole was well tolerated in this study with few patients "This
study confirms the findings of two previous Phase III trials, which demonstrated
that aripiprazole was superior to placebo in controlling the symptoms of
schizophrenia and appeared to have a favorable tolerability profile," said
Jeffrey Lieberman, MD, Vice Chairman of Psychiatry, Professor of Psychiatry and
Pharmacology, at the University of North Carolina at Chapel Hill.
"Due to the major unmet need for this patient population, the results of
ongoing aripiprazole clinical trials will be of great interest," he added.
The "Aripiprazole and Risperidone versus Placebo in Schizophrenia and
Schizoaffective Disorder," was a double-blind, multicenter, four-week study
involving 404 hospitalized patients with a DSM-IV diagnosis of schizophrenia and
schizoaffective disorder with acute relapse. The patient population was
approximately 70% male and 30% female, ranging in age from 18-65 with history of
prior antipsychotic response. Prior to starting double-blind
administration of 20 mg of aripiprazole, 30 mg of aripiprazole, 6 mg of
risperidone or placebo, patients were removed from previous medication for three
to five days. Aripiprazole doses were fixed from day one of treatment.
Risperidone was administered 1 mg twice a day on day one, 2 mg twice a day on
day two, and 3 mg twice a day thereafter.
"We are very excited about the latest phase III study results with
aripiprazole," said Peter S. Ringrose, Ph.D., chief scientific officer and
president of the Pharmaceutical Research Institute at Bristol-Myers Squibb
Company (NYSE: BMY). "These data, in addition to the positive results
of our Phase III study comparing the efficacy of aripiprazole and haloperidol to
placebo, suggest that aripiprazole holds a lot of promise for the millions of
people worldwide who suffer from schizophrenia."
"The Phase III clinical trial program is very encouraging and gives
us great hope that aripiprazole may become an important treatment option,"
said Kazuhiro Tomita, director on board, research, Otsuka Pharmaceutical Co.,
Ltd. "We are very pleased with the outcome of this study and the
possibility it demonstrates for providing patients with a therapeutic
alternative."
Ken
Steele's autobiography, The Day the Voices Stopped, is now available. As you may
know, Ken Steele lived with the devastating symptoms of schizophrenia for 32
years. Finally, Ken's voices stopped with the help of doctors, friends and a new
medication to treat schizophrenia. His eventual treatment and recovery enabled
him to become a leading figure in the mental health community. Tragically, two
days after completing his book, Ken died of heart failure. Co-author, Claire
Berman, a well-known public speaker and gifted author in her own right, has
vowed to share Ken's story through her personal experience of working with and
knowing him.
Thursday
May 17 1:07 PM ET LONDON (Reuters) - Dutch scientists said on Wednesday
they had developed a three-dimensional model of a brain protein that may lead to
new drugs to help people quit smoking or to treat Alzheimer's and schizophrenia.
The protein, produced by glial cells in the central nervous system, helps to
transmit messages between brain cells that control functions such as memory,
attention and addiction. "It will give us a new goal and a new method for
rational drug design," August Smith, a neurologist at Vrije University in
Amsterdam, said in a telephone interview. In a study in the science journal
Nature, Smith and his colleagues described how the protein acts as part of a
receptor, a type of door or link, for a brain-signalling chemical called
acetylcholine that is involved in memory. The three-dimensional structure of the
protein, developed by Titia Sixma and structural biologists at the Dutch Cancer
Institute, will allow researchers to look at it on a computer screen to see
where acetylcholine binds to it. "By having the binding pocket we can try
to make new drugs that target these receptors. By doing so we hope we can
influence particular neuronal functions and not others," said Smith.
Acetylcholine receptors are also involved in the release of other
neurotransmitters including dopamine, which produces feelings of satisfaction
and pleasure, and serotonin, the brain chemical associated with mood. Smokers
get addicted to nicotine largely because it induces the release of dopamine.
Smith said the research was still in its early phases but the discovery of the
protein and its structural model would give researchers a new method to test
drugs to treat addiction, memory loss and other symptoms related to brain
disorders. "The next step is to try to develop drugs that are specific and
that will activate specific types of receptors," said Smith.
The finding, which must still be confirmed by independent teams of investigators, emerged from an ongoing study of people with schizophrenia and their siblings. The study is among the first to suggest a mechanism by which a gene might confer susceptibility to a mental illness, say the researchers. Daniel Weinberger, M.D., Michael Egan, M.D., NIMH Clinical Brain Disorders Branch, and colleagues, report on their results in the May 29, 2001 Proceedings of the National Academy of Sciences. The most disabling form of mental illness, schizophrenia affects one percent of the adult population, typically in young adulthood, with hallucinations, delusions, social withdrawal, flattened emotions and loss of social and personal care skills. Although its cause remains a mystery, evidence suggests that it is at least 80% heritable, stemming from complex interactions among several genes and non-genetic influences. Several chromosomal regions have been implicated, but none have been definitely confirmed and no genes have yet been linked to the disorder. Given the syndrome's daunting complexity, Weinberger and colleagues have been studying many traits to identify those that patients share with their well siblings, hoping to turn up clues to susceptibility genes. Their brain imaging studies had revealed that both well siblings and patients falter on tasks of working memory and show abnormal activation of the prefrontal cortex, which is required for such "executive" functions. Studies have shown that the chemical messenger dopamine plays a pivotal role in tuning the activity of the prefrontal cortex during such tasks. A gene called COMT (catecho-o-methytransferase) had long been suspected of being involved because it codes for an enzyme that breaks down dopamine after it is secreted into the synapse. People inherit two copies of COMT (one from each parent), each in either of two forms. The most common variant, val, reduces prefrontal dopamine activity, while a somewhat less common form, met, increases it. Weinberger and colleagues administered a working memory task known to activate the pre-frontal cortex, the Wisconsin Card Sorting Test (WCST), to 181 schizophrenia patients, 219 of their well siblings and 75 normal controls. They found that those who had inherited 2 copies of val, on average, performed worse than those with only one copy. Those with two copies of met performed best. COMT accounted for 4.1% of the variance in test performance among patients and controls, suggesting that it influences prefrontal functioning When healthy siblings were asked to perform another working memory task (N-back) while undergoing functional magnetic resonance imaging (fMRI), the prefrontal brain activity of those with two copies of val was least efficient; there was excessive activity for a given level of performance. "It's as if they get poorer gas mileage out of their prefrontal cortex if they have this genetic background," said Weinberger, who led the research team. Brain activity of those with one copy of each variant was more efficient, while activity of siblings who inherited two copies of met showed the highest brain efficiency, on average. Among 104 pairs of parents studied, the investigators discovered that the val form of COMT was transmitted to offspring who eventually developed schizophrenia more often than would be expected by chance: 75 times for val, compared to 51 times for met. Inheriting two copies of the val form accounts for a 1.5-fold increased risk for schizophrenia in the general population. The researchers suspect that COMT's effect, while modest, may be amplified through interaction with other susceptibility genes and environmental factors. For example, they are studying a gene in the brain's hippocampus that, together with COMT, could boost schizophrenia risk three-fold. Although it's not yet known exactly how the COMT val variant impairs prefrontal efficiency, evidence suggests that by reducing dopamine it reduces signal-to-noise ratios of communications between neurons, much like static drowns out weak radio stations. "The COMT val allele is certainly not a necessary or sufficient causative factor for schizophrenia, nor is it likely to increase risk only for schizophrenia," caution the researchers. "However, its biological effect on prefrontal function and the relevance of prefrontal function for schizophrenia implicate a mechanism by which it increases liability for the disorder." The researchers are planning to study a COMT inhibitor medication as a possible adjunct treatment to enhance cognitive performance in patients with the val variant. There is evidence that current anti-psychotic drugs work by blocking D2 dopamine receptors in lower dopamine circuits. The NIMH researchers propose that the COMT inhibitor will specifically enhance dopamine circuits specific to the prefrontal cortex. Also participating in the study were Terry Goldberg, Ph.D, Bhaskar Kolachan, Ph.D., Joseph Callicott, M.D., NIMH Clinical Brain Disorders Branch; and David Goldman, M.D., Chiara Mazzanti, Ph.D., Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism.
Monday June 4 1:29 PM ET By Kristin Demos STOCKHOLM (Reuters Health) - Newborns who are deprived of oxygen at birth due to obstetric complications are at four times greater risk of schizophrenia later in life than other children, new research suggests. Many different obstetric complications during pregnancy and delivery are associated with a future risk of schizophrenia, said Dr. Christina Dalman, a psychiatrist who recently published her doctoral thesis at Gothenburg University. Schizophrenia, a mental disorder characterized by disturbances in thought and conduct, mood, sense of self, and relationship with the environment, affects about 1% of the world's population. A growing body of evidence links the disease with complications at birth. ``I've been looking at fetal factors like preeclampsia or if the fetuses are thin,'' Dalman told Reuters Health, ``and I've found that if the fetuses are thin or the mothers have preeclampsia, those babies have a doubled risk of schizophrenia later on in life. I've also looked at babies born before week 33 and they also have a doubled risk. And, then I've been looking at signs of asphyxia and those children have a four times higher risk of schizophrenia later in life.'' Preeclampsia strikes about 5% of first-time mothers, and occurs less frequently among other pregnant women. Characterized by high blood pressure, swelling and protein in the urine, preeclampsia sometimes progresses to eclampsia, a life-threatening condition marked by convulsions. ``Dr. Dalman's work is among the most impressive of any research in this area and puts beyond doubt the evidence that a range of factors during pregnancy and birth can increase the later risk of schizophrenia,'' said Robin Murray, a professor of psychiatry at London's Institute of Psychiatry. ``These include poor nutrition and slow growth of the foetus, hypoxia (lack of oxygen) at birth, and neonatal jaundice.'' Every 10th child is exposed to some complication during childbirth that could lead to schizophrenia, explained Dalman, but most do not develop the illness. The origins of schizophrenia are largely unknown, but the greatest known risk factor is genetic, with a 10 times increased risk for children with one parent with the illness.
Dalman was able to take advantage of a large sampling of people with
schizophrenia in Sweden because of the country's unique registering systems. The
National Birth Register, for instance, contains information on all children born
in Sweden, about 100,000 every year. The researcher was able to compare 524
schizophrenic persons in Stockholm with 1,043 people of the same sex who were
born about the same time. After eliminating factors such as hereditary
psychosis, Dalman found that the risk for schizophrenia was 4.4 times higher for
children who suffer from hypoxia during childbirth.
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