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Feb 19
Pioneering HDR Brachytherapy Treatment - Enables Prostate Cancer Patients To Avoid Overnight Hospita
A leading provincial cancer hospital has become the first in the UK - and one of the first in Europe - to deliver two high dose rate (HDR) brachytherapy radiotherapy treatments in the same day. The procedure at Bristol Oncology Centre using Varian's GammaMed® HDR afterloader and BrachyVision™ planning software often avoids the need for an uncomfortable overnight hospital stay for patients.

HDR brachytherapy involves using needles or catheters to place a radiation source directly within the tumor. These needles are positioned within the tumor using images, treatment planning software, and a computer-controlled device called an afterloader. To maximize accuracy, the needles generally remain in position until all treatment sessions are completed.

Dr Amit Bahl, senior oncologist at Bristol Oncology Centre, said, "When we first introduced brachytherapy treatments we used the standard procedure of delivering the first treatment on the first day and the second treatment a day later. This meant the patient would have to spend the night in hospital with the needles in place. By doing it on a single day, it is beneficial for patient comfort, it enables us to treat more patients and it is helping the NHS by freeing up bed space.

"As well as making it much more comfortable for the patient, there is less chance for needle motion and it reduces the potential for the prostate becoming swollen, as tends to happen 24 hours after the needles have been inserted."

Dr Bahl said this innovative process has only been made possible thanks to the agreement and dedication of the entire clinical team. "It requires a lot of commitment from the entire team of oncologists, physicists, dosimetrists and radiotherapy nurses," he says. "We are lucky here at Bristol because all our people strongly believe in this approach.

"It works like clockwork and the team feels very happy. It is extremely fulfilling to complete the treatment by the end of the day, take the needles out and ensure that the patient has a much better night's sleep. If the patient lives nearby, he can go home that same day."

HDR brachytherapy patients require at least six hours between treatment sessions to enable the body to recover. The team at Bristol treat two patients every other Monday using this process. Patients are normally suffering from locally advanced prostate cancer and they receive brachytherapy as a boost prior to receiving a full course of external beam radiotherapy.

The innovative procedure at Bristol has been rewarded by being shortlisted for a prestigious Department of Health AHPS (Associated Health Professionals and Scientists) Award. A team from the centre attended a short-listing ceremony in London in early January and they will discover whether they have won the Best Team award on February 27th.

Bristol Oncology Centre, which serves 2.4 million people in the Avon, Somerset and Wiltshire region, has been treating clinically using a Varian GammaMed afterloader since 2005. The device is used in combination with BrachyVision treatment planning software, which enables clinicians to plan treatments by combining and using MRI, CT and 3-D scans for the best possible images of the tumor and surrounding organs.

About Varian Medical Systems

Varian Medical Systems, Inc., of Palo Alto, California, is the world's leading manufacturer of medical devices and software for treating cancer and other medical conditions with radiotherapy, radiosurgery, proton therapy, and brachytherapy. The company supplies informatics software for managing comprehensive cancer clinics, radiotherapy centers and medical oncology practices. Varian is a premier supplier of tubes and digital detectors for X-ray imaging in medical, scientific, and industrial applications and also supplies X-ray imaging products for cargo screening and industrial inspection. Varian Medical Systems employs approximately 5,100 people who are located at manufacturing sites in North America and Europe and in its 60 sales and support offices around the world.

Feb 19
GTx Announces Toremifene 80 Mg NDA Accepted For Review By FDA
GTx, Inc. (Nasdaq: GTXI) announced that the United States Food and Drug Administration has accepted for filing and review the New Drug Application (NDA) for toremifene 80 mg, an oral selective estrogen receptor modulator, which GTx seeks to market for the prevention of bone fractures in men with prostate cancer on androgen deprivation therapy (ADT).

The NDA is supported by results from a two year, double blind, placebo controlled, randomized Phase III clinical trial of 1,382 men with advanced prostate cancer on ADT.

GTx expects to hear within several weeks whether the NDA will receive priority or standard review.

About Prostate Cancer

Prostate cancer is the second most common type of cancer diagnosed in men in the U.S. An estimated 186,000 new cases of prostate cancer were diagnosed in the U.S. in 2008.

About ADT

ADT, primary treatment for advanced prostate cancer, has improved survival in men with prostate cancer. Approximately 700,000 men with prostate cancer are being treated with ADT and an estimated 100,000 are anticipated to initiate ADT each year.

ADT works by reducing testosterone to castrate levels. Testosterone, through the process of aromatization, is converted to estrogen. Healthy elderly men actually have higher levels of estrogen than do postmenopausal women. Because ADT reduces testosterone levels by up to 95%, it also substantially depletes estrogen levels.

Although estrogen is commonly thought of as a female sex hormone, it plays a critical role in men's health. Estradiol is the primary hormone responsible for bone turnover and bone quality. It is also important for cognition and the regulation of certain central nervous system functions and metabolism. Depletion of estrogen can result in serious side effects of ADT, including a high risk of bone fractures, adverse lipid changes and increased risk of cardiovascular disease, as well as common symptomatic side effects such as growth of breast tissue often accompanied by tenderness and pain, and hot flashes.

Of patients on ADT, up to 77 percent develop significant bone loss, making them susceptible to fracture. Recent studies indicate that the annual risk of fracture in men on ADT is 5% to 8%, or three times higher than the risk of fracture for postmenopausal women. Fractures are serious and can reduce survival in men on ADT by more than three years.

About GTx

GTx, Inc., headquartered in Memphis, Tenn., is a biopharmaceutical company dedicated to the discovery, development, and commercialization of small molecules that selectively target hormone pathways to treat cancer, osteoporosis and bone loss, muscle loss and other serious medical conditions. GTx is developing toremifene citrate, a selective estrogen receptor modulator, or SERM, in two separate clinical programs in men: first, a completed pivotal Phase III clinical trial evaluating toremifene 80 mg for the prevention of bone fractures and treatment of other estrogen side effects in men with prostate cancer on androgen deprivation therapy, and second, an ongoing pivotal Phase III clinical trial evaluating toremifene 20 mg for the prevention of prostate cancer in high risk men with high grade prostatic intraepithelial neoplasia, or PIN. In 2006, GTx and Ipsen entered into a development and collaboration agreement for toremifene citrate in all indications except breast cancer for Europe and the Commonwealth of Independent States (CIS). GTx has submitted a NDA for toremifene 80 mg for the prevention of bone fractures in men with prostate cancer on ADT and, if approved, plans to commercialize toremifene 80 mg in the United States. In December 2007, GTx and Merck formed a collaboration to discover and develop selective androgen receptor modulators, or SARMs, a new class of drugs with the potential to treat sarcopenia, which is the loss of skeletal muscle mass resulting in reduced physical strength and ability to perform activities of daily living, as well as cancer cachexia (cancer induced muscle loss) and other musculoskeletal wasting conditions. Merck and GTx are evaluating multiple SARM product candidates, including Ostarine™ (designated by Merck as MK-2866) for sarcopenia in several Phase I and II clinical development programs. Merck and GTx are evaluating additional muscle loss indications including cancer cachexia for potential SARM clinical development. GTx also is developing its preclinical compound GTx-758, an oral luteinizing hormone inhibitor, for advanced prostate cancer. http://www.gtxinc.com

Forward-Looking Information is Subject to Risk and Uncertainty

This press release contains forward-looking statements based upon GTx's current expectations. Forward-looking statements involve risks and uncertainties. GTx's actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, the risks that (i) GTx and its collaboration partners will not be able to commercialize their product candidates if clinical trials do not demonstrate safety and efficacy in humans; (ii) GTx may not be able to obtain required regulatory approvals to commercialize product candidates; (iii) clinical trials being conducted by GTx and its collaboration partners may not be completed on schedule, or at all, or may otherwise be suspended or terminated; and (iv) GTx could utilize its available cash resources sooner than it currently expects and may be unable to raise capital when needed, which would force GTx to delay, reduce or eliminate its product development programs or commercialization efforts. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this press release. GTx's quarterly report on Form 10-Q filed November 6, 2008 contains under the heading, "Risk Factors," a more comprehensive description of these and other risks to which GTx is subject. GTx expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in its expectations with regard thereto or any change in events, conditions or circumstances on which any such statements are based.

Feb 19
How Inflammatory Disease Causes Fatigue
New animal research in the February 18 issue of The Journal of Neuroscience may indicate how certain diseases make people feel so tired and listless. Although the brain is usually isolated from the immune system, the study suggests that certain behavioral changes suffered by those with chronic inflammatory diseases are caused by the infiltration of immune cells into the brain. The findings suggest possible new treatment avenues to improve patients' quality of life.

Chronic inflammatory diseases like rheumatoid arthritis, inflammatory bowel disease, psoriasis, and liver disease cause "sickness behaviors," including fatigue, malaise, and loss of social interest. However, it has been unclear how inflammation in other organs in the body can impact the brain and behavior.

The researchers found that in mice with inflamed livers, white blood cells called monocytes infiltrated the brain. These findings support previous research demonstrating the presence of immune cells in the brain following organ inflammation, challenging the long-held belief that the blood-brain barrier prevents immune cells from accessing the brain.

"Using an experimental model of liver inflammation, our group has demonstrated for the first time the existence of a novel communication pathway between the inflamed liver and the brain," said the study's senior author Mark Swain, MD, Professor of Medicine at the University of Calgary.

Swain and his colleagues found that liver inflammation triggered brain cells called microglia to produce CCL2, a chemical that attracts monocytes. When the researchers blocked CCL2 signaling, monocytes did not enter the brain despite ongoing inflammation in the liver.

Liver inflammation also stimulated cells in the blood to make an immune chemical (TNFα). When the researchers blocked the signaling of this immune chemical, microglia produced less CCL2, and monocytes stayed out of the brain.

In the mice with inflamed livers, preventing the entry of monocytes into the brain reduced sickness behaviors; mice showed more mobility and social interaction. These findings suggest that people with chronic inflammatory diseases may benefit from treatments that limit monocyte access to the brain.

"Sickness behavior significantly impacts quality of life. Our findings further our understanding and may generate potential new avenues for treatment of these often crippling symptoms," said Swain.

"The brain is the master coordinator of many of our bodies' defense responses, so it must be able to sense injury and inflammation in distant body organs. This study starts to explain the peripheral communication signals that activate the brain," said Nancy Rothwell, PhD, DSc, at the University of Manchester, an expert on brain inflammation who is unaffiliated with the study.

Feb 19
Cardo Medical Announces Femur-First Versatility With Its Uni-Compartmental Knee System
Cardo Medical (OTCBB: CDOM), a company engaged in the development of orthopedic medical devices, announces the femur-first versatility in surgical technique with its Uni-Compartmental Knee System. Uni-compartmental knee arthroplasty procedures are most commonly performed using tibial-first referencing surgical techniques; however the Cardo Medical Uni-Compartmental Knee system also provides surgeons with additional intra-operative versatility to easily adapt to femur-first surgical techniques. Dr. Andrew Yun, an orthopedic surgeon at St. John's Hospital in Santa Monica, CA, has performed numerous femur-first uni-compartmental arthroplasty procedures and commented, "I have been very satisfied with the ease of use and outcomes with this system. The Cardo engineering team has been incredible to work with, and I have enjoyed the responsiveness and quality of work which comes from this group." In addition, Dr. Jonathan Braslow, an orthopedic surgeon at JFK Memorial Hospital in Indio, CA, also stated, "The Cardo Align 360 instrumentation system eliminates the guesswork for the first cut, the system was easy and simple to use and creates a reproducible outcome each time." The Align 360 Uni-Compartmental Knee System, Cardo Medical's initial product release, has been used successfully since its introduction in January 2007. System enhancements for the femur-first approach include novel, unique femoral tibial alignment ("knee jack") instruments with dedicated alignment and resection guides.

Dr. Andrew Brooks, Chairman and Chief Executive Officer of Cardo Medical, stated, "The Cardo Medical Uni-Compartmental Knee system was our first commercially available arthroplasty system, and also set the standards of simplicity, versatility and reproducibility we design into all our system offerings. The Align 360 Uni-Compartmental Knee system enables surgeons the flexibility to choose between both a tibial-first or femoral-first referencing and resection surgical technique and approach. With its innovative alignment and conservative resection instrumentation, the system easily adapts to any surgeons' training and methodology, including use with mechanical or computer assisted surgical navigation. We are pleased to offer intra-operative versatility within all of our systems and continue to offer modularity and interchangeability, especially within our Align 360 knee platform. Our innovations especially with regards to instrumentation, surgical approaches and techniques enable surgeons to achieve excellent surgical outcomes."

Feb 19
Breast Cancer Survivors At Higher Risk Of Recurrence With Use Of Synthetic Steroid
The Lancet Oncology's February issue report that a breast cancer patient´s risk of recurrence increases considerably with the use of Tibolone, a synthetic steroid used in preventing osteoporosis and treating menopausal symptoms. As a result, breast cancer survivors and current patients should not be givenTibolone.

Early menopause is frequently a result of breast cancer treatments, such as chemotherapy. Hot flushes, night sweats, and bone loss are some of the symptoms that can be relieved with hormonal therapies. As these drugs are thought to trigger cancer recurrence, they should not be prescribed.

The use of Tibolone is approved in 55 countries for treating osteoporosis and it is licensed in 90 countries to reduce the effects of menopause. The drug is currently used by many breast cancer patients to reduce the symptoms of menopause.

Professor Peter Kenemans (VU University Medical Centre, Amsterdam, Netherlands) and his team, evaluated whether a 2•5 mg daily dose of tibolone in women surgically treated for breast cancer and suffering from menopausal symptoms raised the risk of a return of the disease. Of the 3,098 women who were assessed, 1,556 were in the Tibolone group, and 1,542 in the control group, with an average of 52.7 years of age at entry, and 2.7 years since surgery.

The results showed a 40% higher risk for Tibolone recipients - 15.2% (237) of them with recurrence of their cancer - compared to 10.7% (165) of the women receiving a placebo. The assessment was stopped 6 month early because of the evident increased risk. In addition, these recurrences (70%) involved deadly metastases.

The fact that there is no detailed study of the primary tumours, and that breast-cancer risks factors were not evaluated, limits this investigation. Upcoming studies may consider different groups of breast-cancer patients, as well as the extent of the use of tamoxifen, and whether patients are undergoing adjuvant systemic therapy.

Prof Kenemans concludes, "There are insufficient data to establish the safety of tibolone in women who have had breast cancer and do not require or have finished adjuvant therapy." There were no subgroups of breast-cancer patients identified who could safely use Tibolone. Therefore, according to the authors, for all such patients, its use should be avoided or discontinued.

This research has shown that Tibolone is and should remain contraindicated for use in women with a history of breast cancer.

Professor Kenemans and colleagues conducted the study on behalf of the LIBERATE (Livial Intervention following Breast cancer: Efficacy, Recurrence, And Tolerability Endpoints) Study Group. LIBERATE was intended to evaluate the effectiveness and safety of tibolone in women with a history of breast cancer and vasomotor symptoms. The trial was multinational, multicentre, randomised, double-blind, parallel group and placebo-controlled.

The intervention group had a considerable number of distant recurrences (37.8% increase) in comparison to the placebo group.

Feb 19
AIDS Top Killer In China
AIDS was the top fatal infection among the Chinese in 2008, followed by TB, rabies, hepatitis, and infant's tetanus, said a government report released earlier this week by China's Ministry of Health.

China's state-run news agency, Xinhua reported that the official figures show that AIDS claimed 6,897 lives in China between January and September 2008, putting it at the top of the list of infectious diseases for that country for the first time, jumping from the third position it occupied three years ago.

There were 264,302 confirmed cases of people with HIV in September last year, said the Ministry of Health, 34,864 of whom have since died; five times the equivalent number of three years ago. The accumulated cases is nearly double the figure for 2005, which showed 135,630 Chinese had been infected by the virus.

Although the Chinese government did not elaborate on the reasons behind the jump in HIV/AIDS cases and deaths, a recent report in the Associated Press (AP) suggests that the Chinese government's willingness to gradually acknowledge the presence of the disease could be a factor.

There has been no reaction to the figures from UNAIDS or the World Health Organization in Geneva, said the AP report, which mentions that UNAIDS estimates there are 700,000 people living with HIV in China, of whom around 85,000 have AIDS.

According to the Chinese authorities, AIDS came to China in 1982 and their first death from the disease was three years later.

Since 2003 there has been a government policy of "four frees, one care" for all HIV carriers and AIDS patients in China. "Four frees" are free testing for HIV, free counselling and treatment fro HIV infected people in rural areas, free drugs for all pregnant women with HIV, and free education for children orphaned by AIDS.

The "one care" is help for those impoverished by AIDS and the "elimination of AIDS-related discrimination", said the Xinhua report.

According to the AP report, HIV spread in China was caused by tainted blood transfusions and unsanitary blood plasma, but a government report last year said that sex and drugs had now overtaken other causes of HIV spread in the country.

Earlier this week, AHN reported that the World Health Organization is predicting a rise in HIV/AIDS infection rates in Asia among men who have sex with men and this group urgently needs better access to healthcare if the rise is to be avoided.

WHO's adviser on HIV/AIDS in the Western Pacific, Mssimo Ghidinelli told the press that the spread of HIV through men who have sex with men was much bigger than they first thought.

WHO suggests there are some 10 million men who have sex with men in Asia, the highest number of any region in the world.

At the WHO Technical Consultation on Health Sector Response to HIV/AIDS held in Hong Kong on Wednesday, York Chow, Hong Kong's secretary for food and health, said that HIV prevention among men who have sex with men has been the main focus of the city's five-year HIV/AIDS programme which runs from 2006 to 2011.

Chow said HIV rates among men who have sex with men have risen sharply in recent years, accounting for 30 per cent of the 300 to 400 new cases reported every year, reported Xinhua. Chow said most men who have sex with men don't know their HIV status and unprotected sex is a major factor in the spread of the virus.

Government officials from throughout Asia plus representatives from Australia and New Zealand attended the conference.

Feb 19
Enzyme that weakens heart identified
WASHINGTON: A study on mice has shown that an enzyme makes the heart prone to chronic cardiac insufficiency. Published online in the Proceedings of
the National Academy of Sciences, the study also found that the suppression of the same enzyme helps the heart remain strong despite increased stress.

The research team-consisting of researchers from the Internal Medicine Clinic at Heidelberg University Hospital, the University of Texas Southwestern Medical Center at Dallas, and Gottingen University Hospital-say that a key molecule for cardiac hypertrophy brought on by stress is the naturally occurring enzyme CaMKII delta (Calcium/Calmodulin-dependent kinase II delta).

Dr Johannes Backs, head of a research group, has revealed that his international team proved this in genetically modified mice that could no longer produce this enzyme by surgically obstructing the main aorta to put the heart under greater stress, and thus simulate permanent high blood pressure or valve stenosis in humans.

The researcher said that the anticipated enlargement of the heart was very slight - the animals were protected. "With these mice, we succeeded for the first time in specifically suppressing the CaMKII delta enzyme and clarifying its function in detail," said Dr Backs.

According to the researchers CaMKII delta has a direct effect on the cells' stress response, and if it is missing, certain information in cell DNA is not accessed that is normally activated by stress, leading to hypertrophy of the heart. "There was still some slight enlargement of the heart, but presumably not enough to cause cardiac insufficiency," said Dr Backs.

Under normal conditions, the genetically modified mice were inconspicuous - their hearts functioned and reacted normally. Based on their observations, the researchers came to the conclusion that the function of CaMKII delta as an intermediate of the heart's stress response might be a possible approach for effective therapy.

They anticipate that agents that block only this function of the enzyme would prevent the heart muscle from reacting to overload. “Other functions of CaMKII delta should not be affected in order to avoid harmful side effects,” they say.

Source: Times Of India

Feb 19
Scientists link mutations to cancer
WASHINGTON: Scientists have identified two genetic mutations they believe are linked with the most common types of brain cancer and longer survival
times. Researchers at Johns Hopkins and Duke universities discovered variations in the IDH1 and IDH2 genes that are associated with three quarters of the most common types of cancer tumors, known as gliomas.

It is hoped the findings could open the way to more successful treatment of the disease. Patients with these types of mutations can survive at least two times longer than those with other genetic variations, according to the work, which was published in the February 19 addition of the New England Journal of Medicine.

"Pathologists may find it useful to determine IDH1/IDH2 status to help identify and classify these cancers," said Williams Parsons, a visiting professor in pediatric oncology at Johns Hopkins. "The IDH mutation could serve as a biomarker that would help single out individuals who are likely to have better outcomes and receive different treatment," said Darell Bigner of Duke University and a coauthor of the report.

Source:- Times Of India

Feb 19
Licorice ingredient may treat cocaine addiction
WASHINGTON: Researchers in Korea and Pennsylvania have claimed that an ingredient in licorice shows promise as an antidote for the toxic effects of
cocaine abuse.

The study has been published in the January 2 issue of ACS' Journal of Proteome Research, a monthly publication.

In the new study, Meeyul Hwang, Chae Ha Yang, and colleagues note that there is currently no effective medicine for treating cocaine abuse or addiction. Recent animal studies conducted by the researchers show that a licorice ingredient called isoliquiritigenin (ISL) can block the nervous system's production of dopamine. That neurotransmitter is involved in emotion, movement, and other brain activities.

Cocaine and other addictive drugs stimulate dopamine and help produce the pleasurable and addictive effects. Drugs that block dopamine block this response.

To reach the conclusion, the scientists used rats as model animals to show that rats injected with ISL just prior to cocaine-administration showed 50 percent less of the behavioral effects associated with the illicit drug.

They also showed that ISL injections protected nerve cells in the brain from cocaine-associated damage.


Source: Times Of India

Feb 19
Drunk driving a mental problem
STOCKHOLM: Drunken driving is not just an indication of a deeply seated alcohol problem but is also very often connected to psychological disease
and chronic criminal background, says a doctoral thesis presented at the Karolinska Institute (KI). Psychologist Beata Hubicka has in collaboration with the Swedish traffic authority, Vagverket, and the police, carried out a nationwide study involving 1,200 drivers who were charged with drunken driving.

The suspect alcoholic offenders, along with a research group of 786 assuredly sober drivers, were called upon to answer a questionnaire on their alcohol consumption habits. The psychosocial and psychotic health condition of some of the drunken drivers was examined too.

"Earlier research in this area has mostly been undertaken in the US," Hubicka told IANS, after her dissertation at the KI. "However, it became essential to carry out an entirely Swedish study since we have different promille (alcohol in the blood permissible for driving) limits and different attitudes towards drunken driving compared to the US. Such variables have also to be taken into account when dealing with this problem in other countries."

The well-received study shows that "more than a half of the suspected alcohol abusers had earlier committed criminal offences. A large number among the abusers were also found to be suffering serious psychotic problems." "Since such a large number have psychotic problems and a criminal background," says Hubicka, "one should not direct attention solely towards their alcohol problem in any preemptive efforts to resolve drunken driving".

Hubicka said: "The current limit for drunken driving of 0.2 promille (in Sweden, among the strictest globally) is based on physiological studies in which it has been observed and recorded that our capacity for reaction (reflexes) is dangerously impaired with such an alcohol level (in the blood). Since alcohol abuse is such a big risk factor (cause) for drunken criminality, the result of our study should perhaps form the basis for a reconsidered alcohol limit for driving. I would rather suggest that we follow the few countries that have established zero-tolerance."

Source: Times of India

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