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Oct 14
TCD study could help battle against blindness
IMPORTANT RESEARCH at Trinity College Dublin has opened up the possibility of new drug treatments that could halt progressive blindness.

The discovery, which helps specialised drugs penetrate through to their target tissues, may also prove valuable in neurological conditions such as Alzheimer's.

The work comes from the Smurfit Institute of Genetics' Ocular Genetics Unit. Dr Matthew Campbell led the research with Prof Peter Humphries and involved other Trinity colleagues.

They have developed a way to help drugs cross the "blood-retina barrier", the natural seal that keeps blood-borne substances away from the retina.

There is a similar blood-brain barrier that must be overcome to get useful drugs into brain tissues.Almost all of the drugs that look promising for the treatment of degenerative diseases of the retina including retinitis pigmentosa, age-related macular degeneration and retinal damage caused by diabetes cannot reach the retina because of the barrier, Dr Campbell said yesterday.

The new technique, however, temporarily opens up the blood-retina barrier. It uses small pieces of genetic material that temporarily interferes with the barrier and has successfully been shown to work with mice.

Only drugs that have a small molecular size are able to pass through, but unwanted things circulating in the blood such as antibodies or albumin are still kept out, Dr Campbell said.

It so happens that the molecular size of drugs that seem suited to these degenerative diseases is also small, allowing them to pass through the retinal barrier. It will allow rapid testing of drugs that might be useful in these diseases.

Importantly, the technology could also be adapted for use in neuro-degenerative conditions, Dr Campbell added. Diseases of interest in this case include Alzheimer's but also multiple sclerosis. It could also be of use to help drug delivery for untreatable brain tumours, he believes.

Oct 13
Kids' Tummy Aches Eased by Imagination
Children can be taught to use their imagination to tackle frequent bouts of stomach pain, research shows.

A relaxation-type CD, asking children to imagine themselves in scenarios like floating on a cloud led to dramatic improvements in abdominal pain.

The US researchers said the technique worked particularly well in children as they have such fertile imaginations.

It has been estimated that frequent stomach pain with no identifiable cause affects up to one in five children.

The research, published in the journal Pediatrics, follows on from studies showing hypnosis is an effective treatment for a range of conditions known as functional abdominal pain, which includes things like irritable bowel syndrome.

In this study, the children had 20 minute sessions of "guided imagery" - a technique which prompts the subject to imagine things which will reduce their discomfort.

One example is letting a special shiny object melt into their hand and then placing their hand on their belly, spreading warmth and light from the hand inside the tummy to make a protective barrier inside that prevents anything from irritating the belly

The researchers, from the University of North Carolina and Duke University Medical Center, said a lack of therapists led them to the idea of using a CD to deliver the sessions.

In all 30 children aged between six and 15 years took part in the study - half of whom used the CDs daily for eight weeks and the rest of whom got normal treatment.

Among those who had used the CDs, 73.3% reported that their abdominal pain was reduced by half or more by the end of the treatment course compared with 26.7% in the standard care group.

In two-thirds of children the improvements were still apparent six months later.

Anxiety

It is not clear exactly how the technique works but studies have shown it is partly about reducing anxiety but there is also a direct effect on the pain response.

Some researchers think hypnosis-like techniques reduce "hypersensitivity" in conditions such as irritable bowel syndrome.

Study leader Dr Miranda van Tilburg said it was especially exciting that the children were able to use the technique on their own.

"Such self-administered treatment is, of course, very inexpensive and can be used in addition to other treatments, which potentially opens the door for easily enhancing treatment outcomes for a lot of children suffering from frequent stomach aches.

"Children are very good at using their imagination - when you use this in adults you have to overcome a barrier first."

Professor David Candy, a consultant paediatric gastroenterologist at Western Sussex Hospitals, said his team had tried hypnosis in a small group of children with severe abdominal pain problems and had 100% success rate.

He added they are now keen to try the guided imagery technique to see if they can replicate the US findings.

"There is really a dearth of information on how to manage children with abdominal pain and it's a very common problem which keeps children out of school."

Oct 13
Raw Fish Spread Liver Cancer
Uncooked fish can cause human liver cancer, but most sushi lovers need not worry since the condition comes only from eating certain freshwater fish.

The human liver fluke, a freshwater parasite endemic to areas of Thailand, Japan, and Siberia, triggers human liver cancer by creating harmful cell mutations, encouraging tumor growth, and stopping normal cell death, according to a study released yesterday in the journal PLoS Pathogens.

The research could help prevent millions of people from developing liver cancer.

The International Agency for Research on Cancer "has classified Opisthorchis viverrini as a Class One carcinogen," said Sutas Suttiprapa, a scientist at George Washington University and a co-author of the PLoS Pathogens papers.

"I think that over the next year or next few years there will be a big campaign to treat and give these people some knowledge to stop eating raw fish."

There are actually three species of microscopic human liver fluke. O. viverrini is endemic to streams and lakes in Thailand, Laos, and Cambodia and was the actual species of fluke tested by the scientists. Another fluke lives in Siberia, and yet another is found in Japan and Korea.The parasite is only found in freshwater however, so eating sushi from the ocean is safe to eat.

Like many parasites, the human liver fluke has a complicated life span. An egg is first released from the human host. A snail eats the egg, which hatches and begins to develop.

Eventually a free swimming larvae emerges from the snail and attaches to the skin of a freshwater fish. When a human eats the fish raw, or as most people in Thailand are infected, by eating a delicacy of fermented fish, the parasite emerges from the small intestine and takes up residence inside the liver.

Once in the liver three things happen that eventually lead to cancer. First, the body tries to kill the fluke by producing free oxygen radicals. The fluke is largely immune from these attacks, however, so the radicals rebound, enter the body's own liver cells, and mutate human DNA.

Oct 12
Doctors strike: health services at peripheral centres affected
The eight-day old indefinite strike by government doctors today spread to peripheral health centres in the district affecting their emergency and other services.

Over 4,000 doctors, demanding revision in their pay packages, intensified their agitation after talks to break the deadlock failed yesterday.

"All emergency services in the peripheral institutions of the province have been brought under the purview of strike from today in protest against irresponsible and suppressive attitude of the government," spokesman of Doctors Joint Action Committee (DJAC) Dr Neeraj Sharma said here.

This was necessitated because of failure of talks with the government, he said, adding, the two-hour-long meeting between a delegation of DJAC and the Minister for Medical Education RS Chib here did not yield any positive results.

DJAC will continue their strike until their demand, including time bound promotion, is accepted by the state government, Sharma said.

He said that more doctors from Government Medical College (GMC), other associated hospitals and those serving in peripheral institutions of the province will submit their resignations. Earlier, about 300 junior doctors have already tendered their resignations, Sharma said.

However, Chib said that he assured DJAC representatives that the government is actively considering their demand and any announcement in this regard would be made at the time of bi-annual meeting in November.

The minister said that he told the representatives that their two demands regarding change of pay band and enhancement of stipend appeared to be genuine.

Now it is their choice whether to join the duties or keep on striking work, the minister said.

The DJAC among other things has been demanding change of pay band, introducing a law to make assault on health personnel a non-bailable offence, and payment of arrears from January 2006.

Meanwhile, the health services across Jammu continued to remain paralysed today, official sources said, adding, the Out Patients Department (OPD) remained shut in the city hospitals as doctors stayed away from the work.

However, emergency wards were operating in the hospitals, the sources said.

The strike has badly hit the poor patients, who could not pay fee of doctors at the private clinics.

Oct 12
HVP vaccine may prevent 75% cervical cancer in India: study
Researchers at All India Institute of Medical Sciences (AIIMS) have found that vaccination against human papillomavirus (HVP) might prevent 75 per cent of cervical cancers, cause of about 74,000 deaths every year in the country - the highest in the world.

In data presented at the American Association for Cancer Research Frontiers in Basic Cancer Research Meeting, A Raj Kumar Patro and colleagues from the AIIMS have said that vaccines can prevent 75 per cent of cervical cancers in India.

The vaccines for HPV-16 and HPV-18 viruses, the most common types of HPV identified in India, are available in the market, but are costly.

"The vaccine is better accepted than screening in most cases, but it is difficult for most of the population to purchase it at the current price.

"At present, it is purchased by the upper classes and if it becomes freely available through advocacy and outreach efforts, it could reach the general population", Patro, a doctoral student in the Department of Microbiology, AIIMS said.

"In terms of cancer death, India has one-fourth of the global burden and when you standardise for age it is the highest in the world," Patro said.

Oct 12
NIH Prepares To Launch 2009 H1N1 Influenza Vaccine Trial In People With Asthma
The National Institutes of Health is preparing to launch the first government-sponsored clinical trial to determine what dose of the 2009 H1N1 influenza vaccine is needed to induce a protective immune response in people with asthma, especially those with severe disease. The study is cosponsored by the National Institute of Allergy and Infectious Diseases (NIAID) and the National Heart, Lung, and Blood Institute (NHLBI), both part of NIH.

"People with severe asthma often take high doses of glucocorticoids that can suppress their immune system, placing them at greater risk for infection and possibly serious disease caused by 2009 H1N1 influenza virus," says NIAID Director Anthony S. Fauci, M.D. "We need to determine the optimal dose of 2009 H1N1 influenza vaccine that can be safely administered to this at-risk population and whether one or two doses are needed to produce an immune response that is predictive of protection."

The study plan has been submitted to the Food and Drug Administration for review. With FDA allowing it to proceed, the clinical trial will be conducted at seven sites across the United States that participate in NHLBI's Severe Asthma Research Program.

This program already has a well-characterized group of participants with mild, moderate or severe asthma who may be eligible for this new study. These groups are largely distinguished by the amount and frequency of glucocorticoids needed to control asthma symptoms. People with mild disease may not need glucocorticoids, or may require low doses of inhaled glucocorticoids; those with moderate asthma need low to moderate doses of inhaled glucocorticoids; and those with severe asthma need high doses of inhaled glucocorticoids and frequently use oral glucocorticoids as well.

Individuals who already have been infected with 2009 H1N1 influenza or have received a 2009 H1N1 influenza vaccination will not be eligible for the study.

"The results of this study will have immediate implications for individuals with severe asthma as well as those who have milder asthma," says NHLBI Director Elizabeth G. Nabel, M.D.

Early results from other clinical trials of 2009 H1N1 influenza vaccines in healthy adults have shown that a single 15-microgram dose of 2009 H1N1 influenza vaccine without adjuvant is well tolerated and induces a strong immune response in most participants. The same vaccine also generates an immune response that is expected to be protective in healthy children ages 10 to 17 years. Ongoing trials are comparing the immune response to one and two doses of 15- or 30-micrograms of vaccine given three weeks apart in various populations.

The Centers for Disease Control and Prevention has recommended that certain at-risk populations receive the new H1N1 vaccine as a priority before the general population. These target populations include pregnant women, health care providers and individuals with underlying chronic medical conditions, including asthma.

People who have severe asthma may be particularly at risk for infection with the 2009 H1N1 influenza virus. A report published in 2004 suggested that some people who took high doses of glucocorticoids to treat their asthma may receive less protection from influenza vaccines against some strains of influenza. Early in the 2009 H1N1 flu outbreak a CDC review of hospital records found that people with asthma have a four-fold increased risk of being hospitalized with infection compared to the general population.

The study will enroll approximately 350 people with mild, moderate and severe asthma. Participants will be organized into two groups: those with mild or moderate asthma and those with severe asthma. Half of the participants in each group will receive a 15-microgram dose of vaccine, and the other half a 30-microgram dose. Three weeks later, each participant will receive a second dose of the same amount. The strength of the immune response induced by the vaccine will be determined in blood samples by measuring the level of antibodies against 2009 H1N1 flu virus.

Safety data will be collected and examined throughout the course of the study by trial investigators and by an independent safety monitoring committee. Participants will be monitored for any side effects they may experience because of the vaccine, as well as asthma attacks that occur during the study period.

Oct 12
Childhood stressors shorten life span
Individuals who have experienced a stressful childhood are expected to have almost 20 years of shorter lives on average, a new study finds.

According to the study published in the American Journal of Preventive Medicine, the average age at death in individuals with bad childhood experiences ranging from frequent verbal abuse to living with a mentally ill person is about 61 years, compared to 79 in their counterparts with no such experiences as children.

Individuals reporting six or more childhood stressors are 1.7 times more likely to die at the age of 75 or younger, and nearly 2.4 times as likely to die at or before the age of 65.

Childhood stress affects brain development, leading to the development of depression and anxiety, and subsequently to the adoption of unhealthy lifestyle, alcoholism or addiction.

Centers for Disease Control and Prevention (CDC) researchers reported that traumatic childhood events are linked with heart disease, lung disease, liver disease and other conditions.

"If we want to address a lot of major public health issues we've got to address the kind of stressors children have in our society as a way of primary prevention," said lead researcher Robert Anda.

Oct 12
Skin cancer gene 'inherited' in families
While ultraviolet exposure and the environmental effect had long been linked to skin cancer, recent studies suggest the condition runs in families.

According to a study published in Journal of Investigative Dermatology, genes account for about half of the risks that an individual faces in developing the skin malignancy.

Individuals with a sibling or parent affected with a type of non-melanoma skin cancer are more vulnerable to developing skin cancers of various types, not just the ones their relatives had.

The familial influence is believed to be stronger among those with tumors located at body parts more exposed to the sun such as the face.

Compared to having a non-identical twin with melanoma, giving birth to an identical twin with the disease also increases an individual's risk of developing the skin disease by nearly 10-fold.

Scientists said family history can be used to assess an individual's possible risks of developing skin cancer.

Oct 10
Soon, mandatory for pregnant women in India to undergo HIV test
Passing AIDS from mother to child is a human rights violation and soon all pregnant women in India will have to undergo a mandatory HIV test, the parliamentary forum on HIV and AIDS said Friday.

“We want a HIV free generation. We are for testing all pregnant women for HIV so that no children can be born with the disease,” Oscar Fernandes, head of the Parliamentary Forum on HIV and AIDS, told IANS.

“Passing the disease to a new born is a human rights violation. This should stop and all of us must try to make this a success,” he said on the sideline of an event here.

Fernandes, appreciated across the country for advocating a better life for AIDS patients, said: “The new born should not suffer lifelong without committing any sin. Why should they suffer? Isn’t it a human rights violation?”

The former labour minister said the forum met UNAIDS executive director Michel Sidibe Thursday and discussed the issue with him.

“Sidibe said, ‘India must produce a generation without HIV’. This is possible if we go for detecting the virus in every single pregnant women before delivery.”

India is home to at least 2.5 million HIV positive people and thousands of babies are born with HIV positive status as they acquire the virus while in their mother’s womb.

Sidibe, on his first visit to India, has held a series of meetings with government authorities. He has emphasised the role of the political leadership in ensuring that the country’s universal access goals to HIV prevention, care and treatment are achieved.

Fernandes said this would be done by involving the panchayats. “You know, institutional delivery in India happens in around 50 percent of the cases. Here we have to involve the panchayats.”

He added that the health ministry’s Janani Suraksha Yojana (JSY) will take this issue for implementation. JSY is a safe motherhood intervention under the National Rural Health Mission (NRHM) and is being implemented with the objective of reducing maternal and neo-natal mortality by promoting institutional delivery among the poor.

JSY is a 100 percent centrally sponsored scheme and it integrates cash assistance with delivery and post-delivery care. The success of the scheme would be determined by the increase in institutional delivery among the poor families.

“If we detect HIV before the institutional delivery, it will curb HIV spread. You will see it soon,” Fernandes said.

The Parliamentary Forum on HIV and AIDS started in 2000 under the leadership of Oscar Fernandes to to strengthen India’s response to this dreaded disease. Dozens of parliamentarians are its members, who all work to create awareness and help the government in formulating policies on this subject.

Oct 09
Breast cancer cells intends to migrate
It has come to the knowledge from a new study, the breast cancer tumors that till now have not spread do contain cells, those are having tendencies to migrate to new tissue. This, on the other hand, reveals that just because a cancer has not yet spread doesn\'t mean its cells lack the ability or inclination to do so, to the decision of the researchers at the Salk Institute for Biological Studies in La Jolla, Calif.

To them, in addition, there is no such evidence regarding the display of relationship of these cells with a positive or negative health outcome for women with breast cancer. In this respect it should be accepted, that the availability of the processes of self-screening for breast cancer, regular doctor\'s visits and mammograms have all made it possible to identify breast cancer tumors in their early stages. With the detection at the early stage, the cancer cells are found to remain confined within the milk duct, the most common origin of breast cancer tumors. Exclusion of the small tumor and surrounding tissue, is known as lumpectomy, and happens to be the usual treatment for this early stage of breast cancer.

Now there has always been a debate on whether women should also have radiation treatment to address any stray cancer cells, since a steady return of cancer among16 percent of these patients within five years is confirmed.

The study was conducted by the eminent team of researchers in the lab by the process of letting the breast tissue to grow under observation. The next approach was by depending on series of chemical signals, called the ERK1/2 MAP kinase pathway, that remains often active during tumor growth. The aggressive tendency and subsequent growth of the cells was witnessed afterwards. To the researchers, the next step would be to identify biological markers for the diagnosis of patients who are at higher risk of metastasis.

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