Heparin is routinely given to patients before certain types of surgery and prior to treatments such as kidney dialysis to prevent blood clots from forming. Clots that do not naturally dissolve can travel through the blood stream and end up in the brain, causing stroke or in the lungs resulting in a pulmonary embolism.

Heparin is produced naturally by most animals, including humans, but most heparin used today is derived from pig intestines. China has become a popular location for manufacturing heparin because it has a much larger pig population. It is somewhat inexpensive to produce, however, ensuring the safety of drugs manufactured overseas has been a challenge for the Food and Drug Administration (FDA). Just last year, more than 80 Americans died and hundreds more were sickened after they received injections of specific batches of heparin that were manufactured in China. That heparin was later found to have been contained with oversulfated chrondroitin sulfate (OSCS). As a result, researchers have been working to find safer alternatives to heparin.

Liu, whose Recomparin research was published online in the Proceedings of the National Academy of Sciences journal last November, says he is also looking into customizing heparin for other uses, such as a treatment for small-cell lung cancer.

SOURCE: Heparin Recall › Researcher awarded NIH grant for development of synthetic heparin

Earlier this week two former workers at the plant, plant manager Aniruddha Patel and quality control director Ravindra Kumar Sharma, were sentenced in federal court to more than four years in prison for allowing the tainted drugs into hospitals and clinics in Colorado, Florida, Illinois and Texas. Last week, the company’s chief executive, Dushyant Patel, was indicted on 10 charges for fraud and selling adulterated medical devices. A warrant is out for his arrest.

The drugs were not produced at the plant, but were put into the syringes and shipped to the hospitals and clinics from there. According to Patel, the company recalled the syringes a year ago after federal officials began investigating the outbreak.

“Citizens in this country trust that producers of medical devices aren’t lying when they say that have adequately tested a given product,” said U.S. Attorney George Holding to the Associated Press. “As we’ve seen in this case, such lies can literally mean the difference between life and death.”

SOURCE: Heparin Recall › Two sentenced for role in tainted heparin, saline syringes

Allie recently posted a video on YouTube in light of the heparin scandal, asking “Is my insulin tainted?” Last year, more than 80 Americans died and hundreds more were sickened after receiving doses of the blood thinner heparin. An investigation found that batches of heparin manufactured at Baxter International’s China facility had been contaminated. That led to a recall, and further questions about the quality of the foods and drugs imported into the United States from foreign countries, especially China.

Demanding answers, Allie made phone calls to insulin companies and 24 hours later, reported on her results. Her first call was to Sanofi Aventis, a pharmaceutical company based in Bridgewater, NJ. Sanofi Aventis manufactures medications such as Allegra, Ambien, and Ketek as well as diabetes medications such as insulin glargine injection Lantus and insulin gluisine injection Apidra. Allie reports that she was able to speak with a customer service representative with Sanofi Aventis who informed her that the raw materials are manufactured in Germany and are “completely FDA approved and do not come from China.”

Allie compared her attempts to reach Eli Lilly and Company’s customer service as being in the “twilight zone.” Her repeated calls “during normal business hours” were either cut off or unanswered. Lilly is the 10th largest pharmaceutical company in the world and offers a variety of products. It’s diabetes products include Byetta, Gluagon and Humulin.

Allie then called Novo Nordisk, a manufacturer and marketer of pharmaceutical products and services headquartered in Denmark. Novo Nordisk offers a line of diabetes products such as insulin pens, needles and hypokits. She was told that its diabetes products are bottled in North Carolina.  Its FlexPen is manufactured in Denmark. Customer Service assured her they follow FDA guidelines and run batch tests to ensure safety.

SOURCE: Heparin Recall › Diabetic questions safety of insulin in light of heparin scandal

“Previously it was nearly impossible to change the nature of the heparin generated by the enzyme,” said Jian Liu, Ph.D., associate professor at the UNC Eshelman School of Pharmacy medicinal chemistry and natural products division. “The degree of difficulty was 10-plus. Now it’s more like a two or three, which opens the door to the possibility of improving on the natural product.”

The method involves modifying the enzyme heparan sulfate 2-O-sulfotransferase, which produces heparin in the human body in addition to other heparin-like molecules. By modifying 2-O-sulfotransferase, researchers will be able to create customized forms of synthetic heparin with different properties, according to the report.

Heparin is typically administered to most patients during surgery and before some treatments such as kidney dialysis to prevent blood clots from forming. Heparin is produced naturally by most animals, including humans, but most heparin available today is derived from pig intestines. China has become a popular location for manufacturing heparin because it has a much larger pig population.

However, heparin manufactured in China raised concerns earlier this year after batches from Baxter International’s China plant were found to have been contaminated. The investigation into heparin resulted after more than 80 Americans died and hundreds more were sickened after receiving doses of the tainted heparin. As a result, researchers have been working to find safer alternatives to heparin, including developing synthetic versions.

“The pig stuff has served us well for 50 years and is very inexpensive, but if we cannot control the supply chain, we cannot ensure the safety of the drug,” Liu said. “I am working for the day when synthetic heparin can be brewed in large laboratories at a low cost.”

Liu and her colleagues also are looking into customizing heparin for other uses, such as a treatment for small-cell lung cancer.

Liu’s research recently was published online in the journal Proceedings of the National Academy of Sciences.

SOURCE: Heparin Recall › Scientists on road to modifying, customizing human heparin