New Hope For Men With Prostate Cancer
Chicago doctors are seeking better ways to battle the disease
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Now Catalona and his team have developed a new, more refined PSA test that can provide better risk information to these men. This test looks for a substance called minus-2 Pro PSA, which increases in the blood of patients who have prostate cancer—especially those who have the more aggressive forms of the disease.
Northwestern’s doctors are also studying why people living in Asia have much lower prostate cancer rates—and their findings are leading to a counterintuitive treatment. “When people have chemotherapy, the notion is you want to kill cancer cells,” says Catalona. Now researchers are looking at whether genistein, a chemical found in soy bushes—and in diets rich in soy—may shut down the genes that cause cancer cells to invade and spread. Similar to HIV medications, genistein neutralizes the bad cells rather than killing them—in the process, allowing men with prostate cancer to live longer. (Patients with high-risk prostate cancer can enroll in the program by calling 312-695-1995.)
Looking for more efficient ways of detecting returning cancers, another Northwestern urologist, C. Shad Thaxton, is crafting a nanotechnology test that senses tiny levels of PSA in the blood. Once perfected, the test would identify which cells could become cancerous, allowing doctors to initiate treatment earlier and possibly “improve the outcomes for patients with prostate cancer recurrence,” says Thaxton.
Other new high-tech treatments use surprisingly simple ideas. Take the collaborative trial conducted by the Rush University and University of Illinois Medical Centers. It uses high-intensity, highly focused ultrasound to zap specific spots where cancer lesions have recurred after radiation therapy. To explain the process, Leslie Deane, the director of laparoscopic, endourology, and robotic urologic surgery at the U. of I., uses the example of a familiar childhood activity. “As a kid,” he says, “you would sometimes play around with a magnifying glass, focusing the sun’s light on leaves, and you would see a burn.” (Radiation-therapy patients whose prostate cancer has returned can sign up for the new trial by calling 312-440-5127.)
Also at the U. of I., Gail Prins, an andrologist and professor of physiology, is studying how prostate cancers grow in rats. Specifically, she thinks bisphenol A (BPA), which is found in plastic bottles and other products, may harm prostate tissue in baby boys in the womb. When the prostate encounters this estrogen-like compound early in its development, it lays down marks on the DNA, perhaps with long-term repercussions. (Prins recommends steering clear of polycarbonate plastics with a 7 on the bottom and carbonless receipts, most of which contain BPA.)
Meanwhile, robotic surgery is no longer just the stuff of sci-fi movies. “It’s not like a robot assembling a car,” says Deane. Surgical robots allow for the use of other tools with unexpected “skills,” such as the ability to blow carbon dioxide gas into an abdomen to create a larger workspace and compress veins so they bleed less; they also make usually complex cases, such as treating a 350-pound patient, easier. Robots can magnify things 12 to 15 times their normal size, which means surgeons can more carefully control every move; what’s more, the incisions made are significantly smaller—often no bigger than half an inch (into which doctors insert their surgical tools)—and the operations themselves are less invasive. For example, with prostate surgery, patients end up spending only 24 hours in the hospital, not the two to five days typical for more traditional surgical methods.
“The advantages are much less pain and suffering,” says Arieh Shalhav, the chief of urology at the University of Chicago. “And the quality of surgery and continence and potency are as good or better”—helping to diminish the chief concerns of any man confronted with a scary diagnosis of prostate cancer.