Tag Archives: harvard medical school

More kids have autism than thought: U.S. study

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More kids have autism than thought: U.S. study

You may have heard the oft-quoted statistic that autism affects 1 in 150 US children. Turns out it’s more like 1 in 91 — and about 1 in 58 boys, according to new figures released Sunday.

That’s an estimated 673,000 US children — or approximately 1 percent of all U.S. kids, the researchers from the U.S. Centers for Disease Control and Prevention, Atlanta, and Harvard Medical School, Boston report in the journal Pediatrics.

Bob Wright, co-founder of the autism advocacy group Autism Speaks, told Reuters Health he’s not at all surprised by the new figures. “We’ve been screaming about the numbers going up; now there is a relatively complete recognition of it.”

“The statistical aspect of autism is just staggering,” he said, and not enough is being done about it. “If we had 1 in 58 boys getting swine flu, the country would be crazy,” Wright said.

Autism is a brain disorder characterized by problems with social interaction, repetitive behavior and other symptoms. People with a mild version called Asperger’s syndrome usually function relatively well in society, although they have problems relating to others. People with the most extreme symptoms may be unable to speak and may also suffer severe mental illness and retardation.

No one knows what causes autism — it’s generally thought to have genetic and environmental triggers — and there is currently no good treatment.

Autism is “an urgent public health concern,” Dr. Ileana Arias, deputy director of CDC, told reporters on a conference call Friday ahead of public release of the data.

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Diabetes drug kept breast tumors away in mice

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Diabetes drug kept breast tumors away in mice

Adding the common diabetes drug metformin to chemotherapy helped shrink breast cancer tumors faster in mice and keep them away longer than chemotherapy alone, raising hope for a more effective way to treat cancer, U.S. researchers said on Monday.

They said metformin appeared to target breast cancer stem cells — a kind of master cancer cell that resists conventional treatment and may be the source of many tumors that grow back.

“What’s exciting here is we now have something that is mechanistically a different kind of killer of cancer that can synergize with chemotherapy,” Kevin Struhl of Harvard Medical School, whose study appears in the journal Cancer Research, said in a telephone briefing.

Many teams have been looking for ways to destroy the master cancer cells in the hope of making cancer easier to cure.

Last month, a team at the Broad Institute of Harvard and the Massachusetts Institute of Technology reported that a chemical called salinomycin could kill breast cancer stem cells.

What is different with his study, Struhl said, is that metformin is a widely used drug with a long safety track record. “There are tens of millions of people who take this drug,” he said.

“Although our studies are limited to mice and cells, metformin has a history of anti-cancer effects,” he said.

Metformin has already been shown to reduce the risk of some cancers, including pancreatic and breast cancer, in large studies of people with diabetes.

Struhl said metformin’s affect on cancer stem cells appeared to be separate from its ability to help the body use insulin and lower blood sugar — which also can improve breast cancer survival.

His team studied metformin and the cancer drug doxorubicin in lab dishes and found they killed both human cancer stem cells and non-stem cancer cells.

Mice that had tumors and got metformin and chemotherapy were less likely to have tumors grow back two months after treatment compared with mice that got chemotherapy alone.

“When we had both drugs together, we lost the tumors faster, but more importantly, there was no relapse,” Struhl said.

He said with metformin, it may be possible to reduce the chemotherapy dose and still get the same benefit.

That will need to be studied in people and a study is getting under way. Dr. Jennifer Ligibel, at Dana-Farber Cancer Institute and Harvard, is organizing a large trial with colleagues in Canada to study metformin in women with early stage breast cancer.

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