Tag Archives: control

Epigenetic changes may explain chronic kidney disease

In a recent Genome Biology paper, Susztak, and her co-corresponding author John Greally from the Albert Einstein College of Medicine, Bronx, NY, found, in a genome-wide survey, significant differences in the pattern of chemical modifications on DNA that affect gene expression in kidney cells from patients with chronic kidney disease versus healthy controls. This is the first study to show that changes in these modifications – the cornerstone of the field of epigenetics – might explain chronic kidney disease. Epigenetics is the science of how gene activity can be altered without actual changes in the DNA sequence. …

Inflammatory skin damage blocked by bleach solution in animal study

The study was conducted on mice. But if shown to work similarly in humans, the inexpensive, widely available household chemical could provide a new way to treat skin damage caused by radiation therapy, excess sun exposure or aging. Dilute bleach baths have been used for decades to treat moderate to severe eczema in humans, but it has not been clear until now why they work…

One dose of HPV vaccine may be enough to prevent cervical cancer

"The latest Morbidity and Mortality Weekly Report from the Centers for Disease Control and Prevention on vaccination coverage indicates that in 2012, only 53.8 percent of girls between 13 and 17 years old initiated HPV vaccination, and only 33.4 percent of them received all three doses," said Mahboobeh Safaeian, Ph.D., an investigator in the Division of Cancer Epidemiology and Genetics at the National Cancer Institute (NCI) in Bethesda, Md. "We wanted to evaluate whether two doses, or even one dose, of the HPV 16/18 L1 VLP vaccine [Cervarix] could induce a robust and sustainable response by the immune system," she added. "We found that both HPV 16 and HPV 18 antibody levels in women who received one dose remained stable four years after vaccination…

How protein suicide assure healthy cell structures

PLK4 is one of the key proteins required to control centriole formation: in its absence centrioles fail to form, while in excess PLK4 induces the formation of an extra number of those structures. Bettencourt-Dias’ team has now identified how PLK4 controls its levels, and ultimately the number of centrioles. By performing different biochemical assays, the researchers observed that PLK4 is capable of auto-regulating its levels by adding chemical groups of phosphate to itself, which will act as a signal for destruction. However, if PLK4 kills itself too early this will prevent it from ensuring the control of centriole number. …

Study evaluates early stem cell transplants for non-Hodgkin’s lymphoma

But early transplantation does appear to be beneficial among a small group of patients who are at the very highest risk, the study found. Lead author is Patrick Stiff, MD, director of Loyola University Medical Center’s Cardinal Bernardin Cancer Center. The study was developed by the SWOG cancer research cooperative group and funded by the National Cancer Institute. Stiff is chair of the SWOG Bone Marrow and Stem Cell Transplantation Committee. …

Chronic pain in dogs with bone cancer relieved with new treatment

"Dogs are part of the family and we do everything we can to relieve them of pain and discomfort when they are sick," said Dorothy Cimino Brown, D.V.M., School of Veterinary Medicine, University of Pennsylvania, Philadelphia. "In addition to sharing emotional attachments with our dogs, humans share many of the same ailments our pets suffer when fighting cancer. By studying the positive pain relief this treatment afforded dogs, we are hopeful it may also be effective for humans." The evolution of bone cancer pain in dogs parallels what occurs in humans, with the frequency and intensity of pain increasing over weeks and months. As the cancer advances, both canine and human patients experience life-altering pain, which greatly affects their daily activities and quality of life. …

New more effective antimicrobials might rise from old

Writing in the October 7 Early Edition of PNAS, Lars Eckmann, MD, professor of medicine, and colleagues describe creating more than 650 new compounds by slightly altering structural elements of metronidazole and other 5-nitromidazoles (5-NI), a half-century-old class of antimicrobial drugs used to combat everything from an ulcer-causing stomach bacterium to a gut-churning protozoan found in contaminated water. "The basic building blocks of 5-NI drugs are the same for all. We decorated around them, adding extra molecular pieces to change their shapes and sizes," said Eckmann, who published the paper with colleagues at UC San Diego, The Scripps Research Institute and the Queensland Institute of Medical Research in Australia…

Cancer survivors in rural areas forgo health care because of cost

Data analysis showed cancer survivors in rural areas who were aged 65 or older were 66 percent more likely to forgo medical care and 54 percent more likely to forgo dental care because of cost, compared with their urban counterparts. "This is the first population-based study to examine whether cancer survivors in rural and urban areas are equally likely to forgo health care as a result of concerns about cost," said Nynikka Palmer, Dr.P.H., M.P.H., postdoctoral fellow in the Department of Social Sciences and Health Policy at Wake Forest School of Medicine in Winston-Salem, N.C. "We found a disparity among older survivors, for whom health insurance coverage through Medicare is almost universal, while no disparity was found for younger survivors after controlling for various factors. This suggests that health insurance coverage alone may not ensure equal access to health care…

New knowledge on molecular mechanisms behind breast cancer

Researchers are constantly trying to learn more about the body’s advanced communication processes. Receptors serve as a kind of switchboard in the cell, which connects specific signaling proteins to specific cellular functions. Using state-of-the-art technology, researchers at University of Copenhagen have studied a special cell surface receptor of major importance for health and disease…

A more nuanced genetic code: Rules governing expression of developmental genes in embryonic stem cells

This paradoxical state — akin to figuring out how to navigate a red and green traffic signal — has since undergone scrutiny by labs worldwide. What has been postulated is that the control regions (or promoters) of some genes, particularly those critical for development during the undifferentiated state, stay "poised" for plasticity by communicating with both activating and repressive histones, a state biologists term "bivalency." A study by researchers at the Stowers Institute for Medical Research now revisits that notion. In this week’s advance online edition of the journal Nature Structural and Molecular Biology, a team led by Investigator Ali Shilatifard, Ph.D., identifies the protein complex that implements the activating histone mark specifically at "poised" genes in mouse embryonic stem (ES) cells, but reports that its loss has little effect on developmental gene activation during differentiation. …