Whitehead Institute researchers have pinpointed a cellular pathway that determines whether cancerous tumors respond to dietary stipulation during their situation.
Studying human cancer cell lines in mice, researchers have found that when this pathway, known as PI3K, is activated permanently via mutation, tumors grow and proliferate disinterested irrespective of of edibles consumption. However, when the PI3K pathway operates normally, dietary restriction (defined as a 60% reduction in normal intake), results in smaller tumors. The findings are published online in the March 11 issue of Properties.
“Our findings signify that each tumor apartment bears a signature that determines whether or not that cell drive be affected by dietary restriction,” says Nada Kalaany, first author of the paper and a postdoctoral researcher in the lab of Whitehead Member David Sabatini. “We weigh that mutations in the PI3K pathway are a worst determinant of the sensitivity of tumors to dietary restriction.”
The uniting between rations consumption and tumor growth is not new. In the primeval 20th Century, scientists first popular the correlation between a restricted diet and decreased tumor size and incidence. In what way, some cancers’ evolution rate was unaffected by a decrease in food consumption. The reason in the interest this difference remained unclear.
To adjudge how various tumor types are affected by dietary resistance, Kalaany injected cells from human prostate, chest, acumen, and colon cancers into mice in an experimental protocol acclimated to over again to library human cancers. The mice then ate as much as they liked (control group) or received 60% of the caloric intake of their counterparts (the dietary restriction (DR) group). Both groups ingested the same amounts of vitamins and minerals. After a few weeks, Kalaany saw that the cancers could be divided into DR-excitable tumors, with significantly condescend tumor volumes in the DR mice than in control mice, or DR-resistant tumors, whose sizes were apparently unstudied by normal or restricted diets.
Kalaany then grew the despite the fact cancer cells in Petri dishes to inquiries how the DR-sensitive and DR-resistant cancers respond to chow-related hormones in the body. The cancers were grown solutions containing increasing amounts of insulin, insulin-like advance factor 1 (IGF1) or in a solution without these hormones. The results supported the previous experiment: those cancer cells that were DR-sensitive in the mice were also stunted by a fall short of of insulin and IGF1; those cancer cells that were DR-resistant in the mice were unaffected by changes in insulin and IGF1 levels.
Because the difference between the two groups was receptibility or insensitivity to insulin and IGF1, Kalaany thought the insensitive tumors may be dressed something take offence at in a cellular handle called the PI3K pathway, which is activated by insulin/IGF1. A search in place of mutations in two genes found in the PI3K pathway that are often associated with cancer (PI3KCA and PTEN), revealed that DR-resistant cells had mutations in only or the other of the genes, while DR-subtle cells showed no such mutations.
Using a DR-resistant tumor cell line in which the PTEN gene could be switched on or dippy, Kalaany tested whether a metamorphose in the PTEN gene alone could agitate a tumor’s sensitivity to DR. When the PTEN gene was turned off, the cancer cells were not hollow by dietary restriction, and tumor size increased similarly in control and DR mice. But when PTEN was turned on, thereby restoring normal function to the PI3K pathway, the cells became sensitized to dietary restriction and tumor size was smaller in the DR group.
This research was confirmed in two mouse models of cancer, inseparable with prostate cancer caused by PTEN deletion and one with lung cancer and a functioning PTEN gene. Again, the mice without the PTEN gene did not respond to dietary restriction, but the mice with a functioning PTEN gene were sensitive to dietary restriction.
Sabatini says that Kalaany’s results could in to cancer treatments tailored to the characteristics of an party patient’s tumor cells.
“Her findings suggest that if we have therapies that fake dietary provision, we could healthier forebode which tumors would respond to those dietary stipulation-mimicking drugs and which ones would not,” says Sabatini.
Sabatini is also intrigued by the inverse relationship between too much food and an increase in tumors. “We already grasp that the Of one mind States has an epidemic of grossness and that obesity is possibly the biggest contributor to cancer in the U.S., even more so than smoking. Does this exploration have anything to do with that correlation between obesity and cancer, that if we make animals in the final analysis obese, that this pathway is also convoluted in determining their appreciation to cancer? Answering that question is the next step.”
David Sabatini’s primary affiliation is with Whitehead Institute for Biomedical Research, where his laboratory is located and all his delving is conducted. He is also a Howard Hughes Medical Guild investigator and a professor of biology at Massachusetts Commence of Technology.
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Built Citation:
“Tumours with PI3K activation are resistant to dietary restriction”
Essence, online March 11, 2009
Nada Y. Kalaany (1,2,3) & David M. Sabatini (1,2,3,4)
1. Whitehead Set up in behalf of Biomedical Research, Nine Cambridge Center, Cambridge, Massachusetts 02142, USA.
2. Howard Hughes Medical Begin, Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
3. Koch Institute for Integrative Cancer Experiment with at MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
4. Skirt Institute, Seven Cambridge Center, Cambridge, Massachusetts 02142, USA.
Whitehead Institute for Biomedical Research
9 Cambridge Center, Rm. 201
Cambridge
MA 02142
Coordinated States
http://www.wi.mit.edu
The Superintendence of Canada announced that the Great Lakes twist of Viral Hemorrhagic Septicemia has been detected in fish from Hamilton Mooring and the Thames River in Ontario. These two findings mark the first detections of the ailment in 2007 in Canada.
Viral Hemorrhagic Septicemia is an infectious viral blight that can call illness and death in fish, but does not impress soul health. Fish were initially tested by the Ontario Ministry of Natural Resources and the University of Guelph before Viral Hemorrhagic Septicemia was confirmed by the Department of Fisheries and Oceans.
These findings fall within the Ontario ministry’s identified management zone respecting the disease. Therefore, no changes are planned to existing Ontario lodge fish movement controls implemented in near the start 2007. Viral Hemorrhagic Septicemia has been detected in the St. Lawrence River and Great Lakes basin since 2005.
The Government of Canada, in collaboration with the Provinces of Ontario and Quebec, is currently conducting a scrutiny program to larger dig the geographic distribution of the virus and affected species. To date, fish from six sites in Ontario and Quebec should prefer to been tested, and no additional cases of Viral Hemorrhagic Septicemia have been detected. The results of this program, in the same breath analyzed, will help guide actions that federal and provincial governments may take to further manage the disease.
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A compare favourably with, complementary surveillance program is also underway in the United States to anticipate a absolute prototype of the presence of Viral Hemorrhagic Septicemia in the Elevated Lakes basin.
A bang tell of of 2007 Viral Hemorrhagic Septicemia findings from the joint federal-provincial surveillance program will be released in the fall. This program is expected to extend for the next two years. two provinces leave continue to collect fish in the fall of 2007 with the collaboration of the Canadian Food Inspection Agency. The Ontario Religion of Natural Resources determination extend to gather up additional samples with provincial funding from the Canada-Ontario Agreement Respecting the Great Lakes Basin Ecosystem.
http://www.inspection.gc.ca
Sen. Amy Klobuchar (D-Minn.) and Rep. Keith Ellison (D-Minn.) have introduced bills to suspend a proposed federal Medicaid rule that would reduce funding for the state’s MinnesotaCare program and that potentially could edit out up to 18,000 murmurous- and centre-income beneficiaries from the program, the St. Paul Pioneer Press reports.
The rule, which was scheduled to take effect on Sept. 10, would have affected 17,000 adults with incomes between 100% and 200% of the federal poverty level, and 1,000 parents with children ages 19 and 20. HHS officials agreed to delay implementation of the rule for an additional two weeks to give state lawmakers and officials time to make a case against it, the Pioneer Press reports.
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Brian McClung, a spokesperson for Gov. Tim Pawlenty (R), said that the Medicaid rule would results in a loss of $135 million in federal funds over a three-year period, and that “a significant loss of federal funding would seriously jeopardize the state’s ability to assist low-income residents in need of health insurance.” Some state officials said they doubted the state could replace the lost federal funds and retain existing benefits during the current economic downturn, the Pioneer Press reports (Olson, St. Paul Pioneer Press, 9/11).
This article is republished with kind permission from our friends at The Kaiser Family Foundation. You can view the entire Kaiser Daily Health Policy Report, search the archives, or sign up for email delivery of in-depth coverage of health policy developments, debates and discussions. The Kaiser Daily Health Policy Report is published for Kaisernetwork.org, a free service of The Henry J. Kaiser Family Foundation. Copyright 2008 Advisory Board Company and Kaiser Family Foundation. All rights reserved.
As the health secretary, Alan Johnson, tells the annual conference of the NHS Confederation that nurses should be clockwork and their results published on an official website, Which? robustness campaigner, Clare Corbett, says:
“Going into hospital can be blood-curdling but it’s a lot easier if you are asked how you see, have good rations, friendly nurses and compassionate care.
“Hospital watch over can only be improved if people share their experiences, and we have dream of called* for unwavering and staff feedback to be acted upon.”
Notes
In October 2007 Which? launched their ‘Impatient for Change’ manoeuvres which calls in place of:
- Hospitals to analyse the barriers standing in the course of action of patients giving feedback and staff responding.
- A change in culture to a given that welcomes feedback from patients and wants issues to be raised, and that helps patients believe that their opinions are wanted and won’t consequences negatively on their safe keeping.
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- Hospitals and shaft to be more docile to request people what’s going right and what could be better, and to act on the feedback.
Our scrutinize showed that:
- 84 per cent of patients weren’t asked their views while in hospital
- 51 per cent of patients with concerns about an characteristic of their supervision look after, said nothing to staff or the hospital
- 32 per cent of in-patients were despondent with the quality of the food
Which? interviewed 1,000 patients online using GFK Healthcare’s consumer panel during August 2007. All respondents to the survey had spent at least one continuously in convalescent home in the previous 12 months.
http://www.which.co.uk
HIV prevalence among commercial lovemaking workers and street children in Moscow is 30 to 120 times the prevalence among the diversified Russian citizens, according to a study published in the July 2 promulgation of the journal… Lancet, giving credibility to health experts who be struck by warned that the nation’s capital is driving a nationwide epidemic, AFP/Yahoo! News reports. U.S. and Russian researchers, led by Anna Shakarishvili, a medical epidemiologist at CDC, in 2001 and 2002 conducted tests for HIV, three bacterial sexually transmitted diseases and biomarkers for drug use on 1,066 individuals. The study volunteers included teenagers ages 15 to 17 at a juvenile restraint center, adults at homeless detention centers, and men and women at a prison center. Between 45% and 79% of the women in the inspect were commercial sex workers, and as profuse as one in nine were injection cure users. The study found HIV prevalence ranged from 1.8% to 2.9% for all go into participants and was about 4% among women in the prison center. In addition, syphilis, gonorrhea or chlamydia was detected in 120 of the 202 women in the prison center, 97 of the 200 women at the puerile center and 133 of the 200 bums women. “The high prevalent sexual risk behaviors, sexually transmitted infections, injecting drug use, and the overlap between sex work and use of injected drugs … are alarming and could facilitate further dynamite broadening of the epidemics” nationwide, the investigate says. Moscow should launch HIV/AIDS and STD awareness and treatment programs, with a focus on at-hazard women and youth, the researchers conclude (AFP/Yahoo! Hearsay, 6/30). Russia has registered 307,000 HIV cases, but HIV/AIDS experts say more than one million HIV-categorical people alight in Russia and as many as one million Russians could die of AIDS-tied up causes by 2008 (Kaiser Everyday HIV/AIDS Study, 6/15).
“Reprinted with approbation from http://www.kaisernetwork.org. You can gauge the entire Kaiser Everyday Health Procedure Report, search the archives, or sign up for email presentation at http://www.kaisernetwork.org/dailyreports/healthpolicy. The Kaiser Daily Healthiness Policy Report is published for kaisernetwork.org, a independent service of The Henry J. Kaiser Division Foundation . © 2005 Monitory Directors Company and Kaiser Family Underpinning. All rights unemotional.
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Butt rashes are more common in women and the embarrassment it causes is often more painful than the affliction itself. The agreeable news is that treating butt rashes is elementary. Unlike other afflictions, butt rashes not often get discussed revenge oneself on expanse women and hence venereal circles will be of dab or no use in such situations. Let us ergo look at different ways to pay for butt rashes.
1. Butt rashes caused by yeast
Yeast infection is very common and it generally affects the penis in men or the vagina in women. The primary level of treatment lies in containing the yeast infection so it doesn’t spread further. If the butt rash is a result of a yeast infection then it needs to be contained, for the rash to subside.
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2. Contact dermatitis
Contact dermatitis is another form of butt rash and is caused by allergens present in undergarments. This type of rash appears on the buttocks particularly when an individual adopts a sitting posture for long hours. Further, excessive sweating also plays a role in breeding the bacteria.
3. The more serious variants
A third type of butt rash, though uncommon can be more serious and relate to issues like HIV, HSV or even some latent forms of chicken pox.
Topical medication is often adequate to provide relief. However, it is often difficult to diagnoise the type of butt rash, except through proper medical examination. Over-the-Counter medication often addresses the symptoms rather than the root cause. However, some of the natural remedies like Tamanu Oil works wonders for most skin afflictions and leaves no side effect. Accurate diagnosis is essential to bring about a lasting cure for butt rashes and your health adviser can decide the best line of treatment to be adopted.
Butt rashes are more common in women and the embarrassment it causes is often more agonizing than the ailment itself. The good news is that treating butt rashes is simple. You can find out more information about Click on:3 Types of Butt Rashes
New research shows that a protein made by a cancer-causing virus that was thought to be unimportant for its replication is in factually critically needed by the virus to initiate an infection and to reproduce.
The study examined the human T lymphotropic virus type 1 (HTLV-1) and a protein it makes called p13. The protein is one of the virus’ so-called accessory proteins, proteins that earlier studies done in laboratory-grown cells suggested that the virus could live without.
But this new study - done using an animal model that the virus can infect - suggests that HTLV-1 needs the p13 protein to successfully infect the body and reproduce.
The research, published in the April 1 issue of the Journal of Virology, was led by scientists with The Ohio State University Cancer Program and OSU College of Veterinary Medicine.
“It is important to understand the function of these accessory molecules so we know if they should be incorporated into vaccines or targeted by new drugs as a way to prevent infection,” says principal investigator Michael Lairmore, professor and chair of veterinary biosciences and a member of the OSU Comprehensive Cancer Center.
“This viral protein is also important to study because it travels to the mitochondria of infected cells.” Mitochondria produce the cell’s energy supply and store enzymes that carry out the process of natural cell death, or apoptosis.
“These findings should help us begin to learn whether this viral protein influences cell survival, perhaps by extending the life of the cell,” Lairmore says.
HTLV-1 infects an estimated 15 to 20 million people worldwide. About 5 percent of those infected develop adult T cell leukemia or lymphoma (ATLL), an aggressive disease characterized by a long latent period and the proliferation of T lymphocytes. The virus is spread by sexual activity, infected blood and breast milk.
For this study, Lairmore and a group of collaborators developed a mutant strain of HTLV-1 that lacked p13. The researchers then infected one batch of rabbit T cells with the mutant virus and a second batch of rabbit T cells with a strain of normal HTLV-1.
Last, they inoculated six rabbits with T cells infected with virus that lacked the p13 protein and six rabbits with T cells infected with the normal virus. (HTLV-1 spreads when an infected cell touches an uninfected cell.)
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The rabbits inoculated with the virus lacking p13 remained uninfected, while all six rabbits receiving cells with normal HTLV-1 became infected.
“Our findings are the first to indicate that the HTLV-1 p13 protein plays an essential biological role during the early phase of virus infection in an animal model,” Lairmore says.
Next, the researchers will study the function of p13 in HTLV-1 infection, and how it affects mitochondria.
http://www.osu.edu
Acquaintance lens
wearers no longer fool to worry about forgetting to supplant their lenses as
recommended by their eye care doctor. Today, VISTAKON(R), Division of
Johnson & Johnson Envisaging Care, Inc. and maker of ACUVUE(R) Tag Contact
Lenses, announced the federal launch of ACUMINDER(TM), a complimentary
online service designed to improve contact lens compliance and plan salubriousness
for the nation’s 38 million contact lens wearers.
The unusual service was developed following study conducted surrounded by more
than 3,000 visitors to the ACUVUE website which indicated that friend lens
noncompliance is on the take. In 2005, 59 percent of respondents claimed to
change their lenses less instances than recommended by their doctor. In 2006,
that tally skyrocketed to 79 percent.
The results parallel findings from the Americans’ Attitudes &
Perceptions About Vision Care survey, which was conducted by Harris
Interactive(R) on behalf of The Welcome sight Care Institute(TM), LLC, A Johnson &
Johnson Company. In that 2006 measurement of more than 3,700 Americans, less
than half (46 percent) of contact lens wearers agreed that they often
take over from their contact lenses according to the recommended schedule.
And, according to the survey, younger wearers were less plausible to be
compliant. Three out of five contact lens wearers aged 30-39 (58 percent)
or 40 and older (62 percent) said they were likely to adhere to the
recommended schedule, compared to purely two out of five (43 percent) contact
lens wearers aged 18-29. The survey did not dispute wearers impaired the age of
18.
“Adherence to prescribed replacement schedules and recommended wearing
schedules, as fountain-head as flat return visits to the eye care practitioner
for once a year examinations, are indispensable to good visual acuity health,” says Michael
Slusky, O.D., a Chicago-based Optometrist. “Failure to obey with any or
all of these may denouement develop in significant complications and maybe
discontinuation of write to lens attire.”
Contact lens wearers who jot for the free military talents can elect to
receive an unavoidable reminder via e-mail, cell phone text message, and/or a
computer desktop prompt. Registration is get going to all contact lens wearers
at http://www.acuminder.com.
ACUVUE(R) and VISTAKON(R) and ACUMINDER(TM) are trademarks of Johnson &
Johnson Vision Anguish, Inc.
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The Sight for sore eyes Care Institute(TM) is a trademark of The Vision Care
Found, LLC
VISTAKON(R), Division of Johnson & Johnson Perception Care, Inc.
http://www.acuminder.com
If leaders from the U.S. and other countries “want HIV/AIDS programs to be effective, more resources and interventions should be put in place to combat the stigma” associated with the plague, Geeta Rao Gupta, president of the Universal Center for Research on Women, writes in a Washington List inform letter to the columnist in response to a recent Post article.
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Anything else lady Laura Bush correctly “pointed out” in the latest article that the “stigma attached to having AIDS is an enormous barrier to fighting Africa’s pandemic,” Gupta writes. She adds, “Stigma and aestheticism reduce the effectiveness of billions of dollars spent on HIV/AIDS programs because infected people are day in and day out reluctant to avail themselves of these services.”
To address the absence of a “concrete set of tools to effectively put one’s finger on and tackle blemish,” ICRW, the Academy concerning Educational Development and other partners have developed a embellish kit that provides strategies and practical skills seeking communities affected by the virus, local media and constitution care providers “to reverse the savage effect that the stigma has on people infected with and affected by HIV and AIDS,” Gupta writes. She concludes that such “efforts will go a great way in battling AIDS” (Gupta, Washington Post, 7/2).
“Reprinted with permission from http://www.kaisernetwork.org. You can view the undivided Kaiser Daily Fettle Strategy Despatch, search the archives, or dispose of up in compensation email childbirth at http://www.kaisernetwork.org/dailyreports/healthpolicy. The Kaiser Continuously Health Strategy Surface is published for kaisernetwork.org, a spontaneous service of The Henry J. Kaiser Family Bottom . © 2005 Consultive Embark on Gathering and Kaiser Family Foundation. All rights formal.
People who prepare an imperfect bite or misaligned teeth can organize their teeth straightened using some temporary devices. Depending on the pattern of problem their teeth accept, be it a crooked bite, off the mark gaps or awry teeth, the orthodentist purposefulness evaluate a patient’s situation and recommend what kindly of removeable thingumajig a set of teeth may stress.
One of these useful temporary devices are braces. Braces have been used for decades to solve a host of dental problems, such as crooked teeth, misaligned upper or lower jaws, and even for the treatment of temporomandibular joint conditions, or TMJ. There are a number of people who grow up with a set of teeth that weren’t able to develop properly or evenly, upper and lower jaws of dissimilar sizes, and pressure caused by TMJ. With braces, teeth can be aligned to their proper positions, jaws straightened, and beautiful smiles improved.
In the recent years, more and more kinds of braces have become available to a more discerning public. These have included the standard metal braces with metal wires and brackets, ceramic braces with brackets manufactured from ceramic material, and clear braces custom-designed to be nearly invisible within the mouth. The latter are popular with adults and also go by the name Invisalign.
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Another type of braces have hit the market lately. This latest model does away with the lengthy period of time, usually two to four years, that a person needs to wear them on their teeth. People who first encounter the 6 month braces usually react with suspicion and disbelief. How can the long and uncomfortable period necessary to achieve the perfect smile be shortened to a mere 6 months?
Despite speculative responses and skepticism, orthodontists have been quick to defend these new braces. The 6 month braces are installed using the latest techniques and up-to-the-minute technology geared at aligning teeth quickly but in a very safe manner. While they are not to be considered substitutes for comprehensive and thorough orthodontic treatment, people who are in a hurry to get that perfect smile can do so with the 6 month braces.
One of the components used in the 6 month braces are special Nickel Titanium wires. While adults and teenagers alike may worry that the 6 month braces may appear as incongruously as a mouthful of metal, they needn’t be overly concerned. The 6 month braces normally come with brackets the same color as teeth. They will hardly be apparent to anyone at all unless actually people look close enough, that a set of teeth are bound in 6 month braces.
Traditional braces usually require the wearer to use clear hard plastic trays to align the teeth. Because the 6 month braces makes use of brackets and wires that are almost invisible, wearers don’t need to go through difficult procedures, like taking out clear hard plastic trays before having a meal. And these braces only have to be worn for six months!
Using light force to align teeth gently, the 6 month braces may cause temporary discomfort, such as tightness, which can be eased by over-the-counter pain relievers. Because they use only minimal force and are in place for only half a year, the 6 month braces do not damage teeth or gums in any way. They also cost considerably less than traditional braces, which can normally set the wearer back over $5,000 or more.
Cosmeticdentistryguide.co.uk has a wealth of information about oral health and the importance of dental floss. Learn more about the 6 month braces and accelerated orthodontics, visit our website today!
Sylvia Stribling