Archive for the ‘HIV Research’ Category
Gossypol Biological Properties
Last Updated on Monday, 22 October 2007 11:34 Written by admin Monday, 22 October 2007 11:33
Gossypol:
- is a polyphenolic aldehyde that permeates cells and acts as an inhibitor for several dehydrogenase enzymes.
- is antimalarial being the selective inhibitor of Plasmodium falciparum (pfLDH over hLDHs), an essential enzyme for energy generation within malarial parasite.
- posesses proapoptotic properties, probably due to the regulation of the Bax and Bcl2.
- reversibly inhibits Calcineurin and binds to calmodulin.
- inhibits replication of the HIV-1 virus.
- an effective protein kinase C inhibitor.
Posted under Cancer Research, HIV Research, Medicinal Chemistry, Natural Products, New Products, Reagents, Veterinary Research | Comments Off
FDA approves Merck’s Isentress for HIV
Last Updated on Thursday, 18 October 2007 01:22 Written by admin Thursday, 18 October 2007 01:22
Oct 16, 2007 (Datamonitor via COMTEX) — MRK | charts | news | PowerRating — The FDA has granted Merck & Co.’s Isentress tablets accelerated approval for use in combination with other antiretroviral agents for the treatment of HIV-1 infection in treatment-experienced adult patients who have evidence of viral replication and HIV-1 strains resistant to multiple antiretroviral agents.
This indication is based on analyses of plasma HIV-1 RNA levels up through 24 weeks in two controlled studies of Isentress (raltegravir). These studies were conducted in clinically advanced, three-class antiretroviral treatment-experienced adults.
The use of other active agents with Isentress is associated with a greater likelihood of treatment response.
The drug’s safety and efficacy have not been established in treatment-naive adult patients or pediatric patients. Longer-term data will be required before the FDA can consider traditional approval for Isentress.
Peter Kim, president of Merck Research Laboratories, said: “Isentress is the first drug in a new class of antiretroviral therapies that when used in combination with other effective antiretroviral agents, offers a new opportunity for individuals whose HIV infection is no longer adequately controlled and whose virus is resistant to multiple agents. This approval builds on our longstanding commitment to research in HIV/AIDS, with the goal of making truly differentiated therapies available to patients in need.”
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Posted under Discoveries, Innovations and Patents, Grants and Awards, HIV Research, North America, Press Releases | Comments Off
Soya bean can help fight dreaded HIV, claims research
Last Updated on Thursday, 18 October 2007 01:21 Written by admin Thursday, 18 October 2007 01:21
SOYA BEAN is packed with powerful punch. It not only has the power to absorb the heavy metals from the mother earth but also has the potential as a bio-fuel besides possessing the quality to fight the dreaded HIV.
Realising the potential Naithani Plant Genetics Laboratory of Botany Department, Allahabad University (AU), has approached the Council for Scientific and Industrial Research (CISR), New Delhi, to fund its project to carry out further researches on soya bean.
“Soya bean, scientifically called as Glycine max, is a food legume with 18-23 per cent oil content and 38-44 per cent protein content.
It has been found as the richest source of protein after meat and egg. Soya bean can also absorb a considerable amount of heavy metals like cadmium and lead from contaminated soil, acting as Phytoremediator. It has the ability to absorb the deadly poisonous TNT (Tri Nitro Toluene) which is an explosive, present in higher amounts in the soils around factories involved in the production of explosives”, said Dr Girijesh Kumar of Botany Department, AU.
“It was interesting to note that there was no effect in the seed oil content of the plants grown in the contaminated area. For this unique property soya bean can be used for reclaiming soils damaged by industrial wastes. Oil from these plants can be used as bio-diesel by a process called transesterification. Hence, it can be an alternative to petroleum-based fuels, which are dwindling at an alarming rate,” added Dr Kumar.
Dr Kumar said that continuous efforts were being made to raise better mutant genes through mutation breeding. A successful experimentation has been done to study the accumulation of heavy metals in different parts of plants without any damage to the quality of protein and oil content. By using mutation as tool, efforts are on to increase the oil content which could be used as an alternative for petroleum-based fuels. Tetraloids have successfully been raised which doubled the size of the seed.
Since, soya bean is the cheapest source of vegetable protein and its contains many beneficial compounds like lecithin’s, phyto-sterols, fibros, saponins etc which help in cancer prevention, cholesterol reduction and prevention of cardio-vascular diseases, in combating osteoporosis and it is also good for diabetes, therefore it has been selected by us for considerable improvement through mutation breeding. Very few people know that it contains a compound called ‘Saponin B1′ which has anti-HIV properties.
Dr Kumar said that despite so many important features the soya bean farming and its use has not gained popularity owing to its taste. The factor behind it is the presence of linolenic acid in the soya bean.
The experiments are underway to decrease the lenolenic acid level in soya bean for making it more popular. The reduction in linolenic acid content of soya bean by mutation through gamma-rays has given positive results. The modified soya bean was much tasty and the durability of the food cooked by soya bean oil has also been found to have increased. The modified soya bean would also simplify the oil extraction process thus reducing the cost of its oil.
Dr Kumar informed that along with research scholar Priyanka Rai, they have already begun work on the project and set to go full steam once the green signal is received from the CSIR.
Posted under Asia, HIV Research, Press Releases | Comments Off
Immune cells fighting chronic infections become progressively ‘exhausted,’ ineffective
Last Updated on Thursday, 18 October 2007 01:17 Written by admin Thursday, 18 October 2007 01:17
(PHILADELPHIA) – A new study of immune cells battling a chronic viral infection shows that the cells, called T cells, become exhausted by the fight in specific ways, undergoing profound changes that make them progressively less effective over time.
The findings also point to interventions that would reverse the changes, suggesting that novel therapies could be developed to reinvigorate T cells that become depleted in their struggle against a virus. Alternatively, strategies that would intentionally trigger the immune-dampening mechanisms explored in the study could prove useful in countering autoimmune disorders in which the immune system is inappropriately activated.
Although the experiments were conducted in mice, the problem of T-cell exhaustion has also been identified in HIV, hepatitis B, and hepatitis C infections in humans, as well as some cancers, such as melanoma. A report on the study results appears in the current issue of Immunity, published online October 18.
“We knew that T cells responding to chronic infections become progressively compromised in many of their functional properties,†says E. John Wherry, Ph.D., an assistant professor in the Immunology Program at The Wistar Institute and lead author on the Immunity study. “Put simply, the T cells become exhausted as time passes. What we wanted to learn in our study was what the specific problems were with these cells and whether their depleted state could be reversed.â€
Using a technique called gene-expression profiling, Wherry and his colleagues identified 490 genes whose activity in T cells is altered during a chronic viral infection. Closer study at different time points using a 22-gene subset of the larger group of genes provided molecular signatures of progressive T-cell exhaustion. Only a few changes in the activity of the 22 genes were seen at the end of the first week of infection, increasing to 9 differences at two weeks, 18 differences at one month, and 21 differences at two months. At the end of two months, T cells contending with a chronic infection were sluggish metabolically and immunologically unresponsive to stimulus.
One gene identified as playing a central role in this process is called PD-1, which codes for an inhibitory receptor on the surface of the T cells. By blocking PD-1 in vivo, the researchers found they could alleviate T-cell exhaustion, get more functional T cells, and control the infection better.
“Blocking this one pathway partially reverses T-cell exhaustion in some settings, suggesting that we may be able to intervene to reinvigorate depleted immune cells,†says Wherry. “The T cells undergo many changes during chronic infections, however, so that it will be important to learn how to treat them for multiple problems.â€
Wherry notes that the mechanisms involved in T-cell exhaustion also have important upsides.
“The flip side of this process is that the immune system has developed an effective way to turn off its response to a stimulus – which is exactly what one wants to do in the case of autoimmunity,†he says.
He points out, too, that the energy outlay during the acute phase of the immune system’s response to an infection is enormous – and fundamentally unsustainable.
“In the first week of an immune response to a virus, T cells can divide every four to six hours, as fast as any other mammalian cell at any time during development,†Wherry says. “In terms of their rate of division, T cells are in the same category as cells in the earliest stages of embryonic development. The energy involved in doing this is extraordinary, and the body can’t keep that up for an extended period of time.â€
###
Wherry is the lead author on the Immunity study, as well as the corresponding author. The senior author was Rafi Ahmed at the Emory University School of Medicine. The co-authors on the study are; Sang-Jun Ha, Surojit Sarkar, Vandana Kalia, and Shruti Subramaniam at Emory; Susan M. Kaech at Yale University Medical School; W. Nicholas Haining at the Dana-Farber Cancer Institute; Joseph N. Blattman at the Fred Hutchinson Cancer Research Center; and Daniel L. Barber at National Institutes of Health.
Funding for the research was provided by the National Institutes of Health, the Foundation for NIH, the Bill and Melinda Gates Foundation, the Elizabeth Glaser Pediatric AIDS Foundation, the Cancer Research Institute, and the Commonwealth Universal Research Enhancement Program of the Pennsylvania Department of Health.
The Wistar Institute is an international leader in biomedical research with special expertise in cancer research and vaccine development. Founded in 1892 as the first independent nonprofit biomedical research institute in the country, Wistar has long held the prestigious Cancer Center designation from the National Cancer Institute. Discoveries at Wistar led to the creation of the rubella vaccine that eradicated the disease in the United States, human rabies vaccines used worldwide, and a new rotavirus vaccine approved in 2006. Today, Wistar is home to preeminent research programs studying skin cancer, lung cancer, and brain tumors. Wistar Institute Vaccine Center scientists are creating new vaccines against pandemic influenza, HIV, and other diseases threatening global health. The Institute works actively to transfer its inventions to the commercial sector to ensure that research advances move from the laboratory to the clinic as quickly as possible. The Wistar Institute: Today’s Discoveries – Tomorrow’s Cures. On the web at www.wistar.org.
Posted under HIV Research, North America, Press Releases | Comments Off
CLC bio joins $2.5M research project on HIV, bird flu, and other RNA-based diseases
Last Updated on Friday, 4 May 2007 07:24 Written by admin Friday, 4 May 2007 07:24
Aarhus Denmark, April 30, 2007 — CLC bio, the IT University of Copenhagen, and the Department of Molecular Biology at the interdisciplinary nano science centre (iNANO) of University of Aarhus are proud to announce that the Danish Council for Strategic Research has approved to fund the ambitious and ground-breaking research project PC Mini Grids for Prediction of Viral RNA Structure and Evolution.
Professor at the Department of Molecular Biology at University of Aarhus iNANO center, Jørgen Kjems, states:
“Being part of this research project and collaborating with the top scientists from IT University of Copenhagen and CLC bio will provide us with innovative and valuable tools as well as input for new and ground-breaking research into RNA-based diseases. We are thrilled to be a part of this interdisciplinary research project, and have great expectations of the outcome.”
The project aims at designing a collaborative, peer-to-peer software architecture for distributed bioinformatics algorithms, to make research into RNA-based diseases like HIV, SARS, and bird flu faster and more efficient than with current approaches. An important part of the project is to develop better and more user-friendly bioinformatics software for theoretical analysis of RNA available for conventional biology laboratories.
Detailed search and analyses on large amounts of data and time consuming calculations are significant components when doing research in RNA-based diseases. Work efficiency is enhanced with the development of novel software systems, which utilize ordinary workstation computers for analysis, and by improving the user-friendliness and robustness of such distributed parallel computing. This implies such analyses can be performed by non-technical persons, including biologists working in the laboratory. In other words: by developing this kind of solution, this project will dramatically help scientists and researchers worldwide get better RNA-research results in less time, through a simple graphical user interface on a standard computer.
The project will take four years and the total costs amount to 2.5 million USD of which half is funded by the Danish Council for Strategic Research and the other half is co-financed by the three parties involved.
An interesting feature about the project is the involvement of different fields of science. The project is truly interdisciplinary by involving researchers from computer science, bioinformatics, molecular biology, and nano technology.
With the participation in this research project, CLC bio takes an important step toward assuring that CLC RNA Workbench – the upcoming bioinformatics software package for advanced RNA sequence analysis – will continuously be ahead of competing products when it comes to user-friendliness, scientific level, and innovative use of the latest IT technology.
About CLC bio
CLC bio is the world’s leading full-service bioinformatics solution provider, solely focusing on the development of bioinformatics: software, hardware, data analysis, and custom-designed bioinformatics algorithms. CLC bio is an Apple solution provider and value added reseller.
CLC bio’s mission is to be among the most innovative bioinformatics companies in the 21st century. This is realized through:
Development of bioinformatics software and hardware based on the latest scientific findings
User-friendly, integrated and intuitive software solutions
Continuous focus on customer needs and superior customer service
Frequent product updates including the latest IT technologies and bioinformatics algorithms
A flexible IT architecture, enabling customers to buy or develop individualized solutions at a reasonable price.
Posted under Bird Flu Research, ChemInformatics, Europe, HIV Research, Press Releases, Research Projects | Comments Off
Setting The Stage To Find Drugs Against SARS
Last Updated on Wednesday, 6 December 2006 08:56 Written by admin Wednesday, 6 December 2006 08:56
Scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have set the stage for the rapid identification of compounds to fight against severe acquired respiratory syndrome (SARS), the atypical pneumonia responsible for about 800 deaths worldwide since first recognized in late 2002. Researchers from Brookhaven’s biology department and the National Synchrotron Light Source (NSLS) characterized a component of the virus that will be the target of new anti-SARS virus drugs. The results were published online by Biochemistry on November 17, 2006.
“Although vaccines against viruses are very effective, vaccines for viruses that mutate rapidly – such as the viruses that cause SARS, AIDS, and bird flu – are much more difficult to obtain,” said Brookhaven biologist Walter Mangel, the lead author of the paper. “Even if a vaccine is available, antiviral agents are important in stopping the spread of highly infectious viruses. If antiviral agents for SARS had been available, they could have been used to contain the outbreak to the initial site of the infection.”
The researchers studied the SARS main proteinase, an enzyme used by the virus during infection to cut newly made viral proteins into gene-sized, functioning pieces. If the proteinase is prevented from working, the virus infection is aborted. Previous studies have revealed that the proteinase is inactive when in the form of single molecules. But once two of those molecules bind together to make what is called a dimer, the enzyme becomes active and is able to play its role in SARS virus reproduction. The challenge for researchers, and the focus of the Brookhaven study, was to determine the concentration at which individual proteinase molecules form active dimers. Knowing this concentration, for which estimates at other laboratories have varied greatly, would allow researchers to search for anti-SARS drugs more efficiently by ensuring that the proteinase used in tests is initially in its active form.
Using three different scientific techniques, including x-ray scattering at the NSLS, the Brookhaven researchers obtained almost identical values for this concentration. Now that this crucial value has been narrowed down to a precise range, researchers can focus on finding compounds that bind to the active form of the enzyme.
“Targets for antiviral drugs must be carefully chosen such that binding to it prevents the virus from reproducing,” Mangel said. “Viral proteinases are excellent targets for antiviral drugs. One reason so many people are surviving the AIDS epidemic is the effectiveness of drugs targeted to the proteinase of human immunodeficiency virus (HIV).”
One way to obtain compounds that bind to a proteinase is via high-throughput screening. Chemical libraries containing tens of thousands of small compounds are available that can be searched for effective drugs against various diseases. Small amounts of a target, e.g., an active viral proteinase, are placed in tiny wells in a plate, and a different compound from the library is added to each well.
To determine whether a compound binds to and inhibits the proteinase, an additional molecule is added that changes color in the presence of an active proteinase. Wells that don’t show a color change therefore contain compounds that inhibit the proteinase, and could be effective antiviral agents. Earlier this year, Mangel’s research group published a procedure on the synthesis of a new compound that changes color in the presence of the active form of the SARS main proteinase.
However, for this screening process to work, the SARS proteinase inserted into the wells has to be active to begin with. Knowing the concentration range for dimer formation will therefore help researchers in their search for a compound to stop the virus. “Now that the stage is set, high-throughput screening can begin,” Mangel said. “Hopefully, it will yield an antiviral agent that can be stockpiled before a virulent strain of the virus reappears.”
###
This research was supported by the Office of Basic Energy Sciences within the U.S. Department of Energy and the National Institutes of Health.
Posted under Bird Flu Research, HIV Research, Medicinal Chemistry, North America, Press Releases | Comments Off
Protected: BIT’s 4th Annual Congress of International Drug Discovery Science & Technology 2006 (IDDST-2006)
Last Updated on Monday, 10 April 2006 07:53 Written by iddst2006 Wednesday, 15 February 2006 11:14
Posted under Africa, Asia, Asia, Business and Investment, Cancer Research, Collaborations, Discoveries, Innovations and Patents, Drug-Like Compounds, Education, Europe, Events, HIV Research, Industry News, Medicinal Chemistry, New Products, News by Subject, North America, Press Releases, Reagents, South America | Comments Off
CytRx Announces Clinical and Corporate 2006 Milestones
Last Updated on Wednesday, 11 January 2006 09:36 Written by admin Wednesday, 11 January 2006 09:36
LOS ANGELES, Jan. 11 /PRNewswire-FirstCall/ — CytRx Corporation
(Nasdaq: CYTR) today announced projected major 2006 clinical and corporate
milestones and reviewed 2005 achievements aimed to advance the Company’s goal
to develop and commercialize human therapeutics, primarily in the area of
small molecules and ribonucleic acid interference (RNAi).
CytRx’s 2005 highlights include:
* 1Q05 — Completed enrollment in HIV DNA + protein vaccine Phase I
clinical trial
* 2Q05 — Received orphan drug status designation from the U.S. Food and
Drug Administration (FDA) for arimoclomol in the treatment of
amyotrophic lateral sclerosis (ALS or Lou Gehrig’s disease)
Filed an investigational new drug (IND) application with the
FDA for a Phase II clinical trial with arimoclomol for ALS
treatment
* 3Q05 — Announced interim positive data from HIV DNA + protein vaccine
Phase I clinical trial, indicating the first vaccine to
produce potent antibody responses with neutralizing activity
against multiple HIV viral strains
Commenced a Phase IIa clinical trial with arimoclomol for ALS
Granted “Fast Track” designation for arimoclomol for ALS
* 4Q05 — Entered into a significant licensing agreement with the
University of Massachusetts Medical School to develop newly
discovered obesity and type 2 diabetes drug targets
Major CytRx 2006 objectives:
* 1Q06 — Complete enrollment in Phase IIa clinical trial with
arimoclomol for ALS
* 2Q06 — Announce final results from a Phase I HIV DNA + protein
vaccine clinical trial
* 3Q06 — Report data from Phase IIa clinical trial with arimclomol for
ALS
Commence pivotal Phase IIb clinical trial following FDA review
and acceptance
CytRx also announced that it will continue to expand its program of small
molecule drug candidates against targets identified and validated using its
proprietary RNAi screening technology at its laboratory in Worcester,
Massachusetts. In addition, CytRx hopes to move a lead candidate from its
RNAi therapeutics drug development program, which focuses on type 2 diabetes,
obesity, cytomegalovirus and ALS, through the development phase toward an IND
submission.
“CytRx is in the enviable position of having numerous drug development and
discovery programs against novel drug targets in large market disease
indications, many of which have no effective treatments,” stated CytRx
President and CEO Steven A. Kriegsman. “Our plans for 2006 include actively
seeking large corporate partners to assist in the development of and
advancement toward commercialization of select drug candidates.
“We believe that creating awareness of the Company with the scientific and
investment communities is essential to advance CytRx and build substantial
increased value for our shareholders. To that end, we also plan to capitalize
on opportunities to present at scientific forums and investment conferences,”
he added.
About ALS
ALS is a progressive degeneration of the brain and spinal column nerve
cells that control the muscles that allow movement. According to the ALS
Survival Guide, 50% of ALS patients die within 18 months of diagnosis and 80%
die within five years. In the U.S., an estimated 30,000 people are living
with ALS and nearly 6,000 new cases are diagnosed annually, according to the
ALS Association. There are more than 120,000 people living with ALS
worldwide.
About Arimoclomol
The current Phase IIa clinical trial is a multi-center, double-blind,
placebo-controlled study of patients with ALS. Eighty ALS patients at 10
centers across the U.S. are included in the clinical trial. Patients will
receive either placebo (a capsule without drug), or one of three dose levels
of arimoclomol capsules three times daily, for a period of 12 weeks. The
primary endpoints of the Phase IIa trial are safety and tolerability.
Secondary endpoints include a preliminary evaluation of efficacy using two
widely accepted surrogate markers, the revised ALS Functional Rating Scale
(ALSFRS-R), which is used to determine a patient’s capacity and independence
in 13 functional activities, and Vital Capacity (VC), an assessment of lung
capacity.
The subsequent pivotal Phase IIb trial will be powered to detect more
subtle efficacy responses. Although this second trial is still in the
planning stages, it is expected to include 300 ALS patients recruited from 25
clinical sites and will take approximately 18 months to complete.
About HIV
HIV, the virus that leads to acquired immune deficiency syndrome (AIDS),
remains a global epidemic. World health officials estimate 40 million people
are now infected with HIV. Some 3 million people died of AIDS last year,
worldwide, and millions more are expected to die from AIDS this year. With
the rate of infection accelerating in many parts of the world, the search for
an effective HIV vaccine is one of the highest public health priorities.
Development of an HIV vaccine has been challenging because of the virus’
extraordinary degree of genetic diversity. HIV mutates rapidly in the
environment making it an elusive target for traditional vaccine strategies.
About DP6-001
The HIV DNA + protein vaccine formulation, which is exclusively licensed
to CytRx, was created by researchers at the University of Massachusetts
Medical School (UMMS) and Advanced BioScience Laboratories (ABL). This
program is funded under a $16 million five-year HIV Vaccine Design and
Development Team contract from the National Institute of Allergy and
Infectious Diseases (NIAID), part of the National Institutes of Health.
The HIV vaccine Phase I clinical trial was initiated in April 2004. The
goal of the Phase 1 clinical trial is to assess the ability of the vaccine to
safely stimulate both antibody and T-cell immune responses to viral protein
antigens in the vaccine, including “envelope,” which is also carried by HIV.
The envelope antigen is a critical protein on the surface of the AIDS virus
that facilitates the infection of humans. The vaccine initially “primes” the
subject’s immune system with injections of DNA that cause the subject’s own
cells to produce the HIV envelope proteins, followed by protein “boosts” from
an injection that contains the corresponding HIV envelope proteins. The
vaccine was tested in three groups of healthy volunteers: Group A received the
DNA vaccine under the skin, and Groups B and C received the DNA vaccine in
muscle, with Group C receiving a six-fold higher DNA dose compared with Groups
A and B. All were subsequently “boosted” with the mixture of envelope protein
antigen.
About CytRx Corporation
CytRx Corporation is a biopharmaceutical research and development company
engaged in the development of products, primarily in the area of small
molecules and ribonucleic acid interference (RNAi). The Company owns three
clinical-stage compounds based on its small molecule “molecular chaperone”
co-induction technology, as well as 500 proprietary analogs with potential as
backups and new chemical entities (NCE) for new indications related to the
mechanism of chaperone co-induction. CytRx has initiated a Phase II clinical
trial with its lead small molecule product candidate arimoclomol for the
treatment for amyotrophic lateral sclerosis (ALS or Lou Gehrig’s disease).
Arimoclomol has received Orphan Drug and Fast Track designation from the U.S.
Food and Drug Administration. CytRx has previously announced that a novel HIV
DNA + protein vaccine exclusively licensed to CytRx and developed by
researchers at the University of Massachusetts Medical School (UMMS) and
Advanced BioScience Laboratories, and funded by the National Institutes of
Health, demonstrated very promising interim Phase I clinical trial results
that indicate its ability to produce potent antibody responses with
neutralizing activity against multiple HIV viral strains. For more
information, visit CytRx’s Web site at http://www.cytrx.com.
About Advanced BioScience Laboratories
Advanced BioScience Laboratories, Inc. (ABL) located in Kensington Md., is
a biomedical research, development and manufacturing company focusing on human
retroviral diseases. ABL has been a leader in HIV-1 research for more than
two decades and has been involved in the development of methods to both
prevent and treat HIV-1 infection.
About the University of Massachusetts Medical School
The University of Massachusetts Medical School, one of the fastest growing
academic health centers in the country, has built a reputation as a
world-class research institution, consistently producing noteworthy advances
in clinical and basic research. The Medical School attracts more than
$174 million in research funding annually, 80% of which comes from federal
funding sources. Research funding enables UMMS scientists to explore human
disease from the molecular level to large-scale clinical trials. Basic and
clinical research leads to new approaches for diagnosis, treatment and
prevention of disease. Visit http://www.umassmed.edu for additional information.
Forward-Looking Statements
This press release may contain forward-looking statements within the
meaning of Section 21E of the Securities Exchange Act of 1934, as amended.
Examples of such statements include, but are not limited to, statements
relating to the expected timing, scope and results of our clinical development
and research programs, including the initiation of clinical trials, and
statements regarding the potential benefits of our drug candidates and
potential drug candidates. Such statements involve risks and uncertainties
that could cause actual events or results to differ materially from the events
or results described in the forward-looking statements, including risks or
uncertainties related to regulatory approvals for clinical testing and the
scope of the clinical testing that may be required by regulatory authorities
for its molecular chaperone co-induction drug candidates, including
arimoclomol, and other products, and the timing and outcomes of those tests,
uncertainties related to the early stage of CytRx’s diabetes, obesity,
cytomegalovirus and ALS research, the need for future clinical testing of any
RNAi-based products and small molecules that may be developed by CytRx, the
significant time and expense that will be incurred in developing any of the
potential commercial applications for CytRx’s RNAi technology or small
molecules, CytRx’s need for additional capital to fund its ongoing working
capital needs, including ongoing research and development expenses related to
its molecular chaperone co-induction drug candidates, risks relating to the
enforceability of any patents covering CytRx’s products and to the possible
infringement of third party patents by those products, and the impact of third
party reimbursement policies on the use of and pricing for CytRx’s products.
Additional uncertainties and risks are described in CytRx’s most recently
filed SEC documents, such as its most recent annual report on Form 10-K, all
quarterly reports on Form 10-Q and any current reports on Form 8-K filed since
the date of the last Form 10-K. All forward-looking statements are based upon
information available to CytRx on the date the statements are first published.
CytRx undertakes no obligation to publicly update or revise any
forward-looking statements, whether as a result of new information, future
events or otherwise.
For Additional Information:
CytRx Corporation: CEOcast, Inc.
Ed Umali (eumali@cytrx.com) Investor Contacts:
Director of Corporate Communications Kevin Theiss (ktheiss@ceocast.com)
(310) 826-5648, ext. 309 Cormac Glynn (cglynn@ceocast.com)
(212) 732-4300
Posted under Business and Investment, HIV Research, Press Releases | Comments Off
UC Riverside Researchers Discover Model Organism For Studying Viruses that Affect Humans
Last Updated on Tuesday, 23 August 2005 04:18 Written by admin Wednesday, 17 August 2005 04:14
Simple nematode has similar virus-fighting mechanism as humans and can be used in research
RIVERSIDE, Calif. – www.ucr.edu – Researchers at the University of California, Riverside have discovered that a simple worm, called C. elegans, makes an excellent experimental host for studying some of the most virulent viruses that infect humans.
The researchers published their findings in the Aug. 18 issue of the journal Nature in a paper titled, Animal virus replication and RNAi-mediated antiviral silencing in C. elegans.
UCR Professor of Plant Pathology Shou-Wei Ding co-authored the paper with Morris Maduro, assistant professor of biology; Feng Li, a graduate student in microbiology; Rui Lu and Hongwei Li, postdoctoral researchers in Ding’s laboratory; and research specialists Gina Broitman-Maduro and Wan-Xiang Li. Lu and Maduro are co-first authors of this Nature paper. The National Institutes of Health and the U.S. Department of Agriculture supported the research.
The paper reflects a major step forward in the study of how some of the world’s most virulent viruses, such as West Nile, SARS, Ebola and Hepatitis C interact with their hosts.
“All these viruses are very dangerous and are traditionally studied in animal models, so large-scale genetic studies of the host-virus interaction is very hard to do,†said Ding, who works in the Center for Plant Cell Biology at UCR’s Institute for Integrative Genome Biology. “Needless to say, we are all very excited to find that this little worm can be used to understand how hosts genetically control viruses.â€
For years researchers throughout the world have studied C. elegans because many aspects of its biology, such as genetics, development and the workings of neurons, mirror the biology of humans. However, no viruses were known to infect the millimeter-long roundworm so it was not used as a model for studying viral infections.
The Nature paper now shows that UC Riverside researchers have developed a strain of the worm, C. elegans, in which an animal virus could replicate, allowing them to map the delicate dance of action and reaction between virus and host.
The UCR team has shown that virus replication in the worm triggers an antiviral response known as RNA silencing or RNA interference (RNAi). RNAi specifically breaks down the virus’ RNA. Virus RNA creates proteins that allow the virus to function. The virus responds by producing a protein acting as a suppressor of RNAi to shut down the host’s antiviral response. Virus infection did not occur when the viral RNAi suppressor was made inactive by genetic mutations in the host system.
C. elegans’ RNAi system is considered a “blanket system,†meaning that it has parallels in humans, making the worm model discovered by Ding and his colleagues a valuable tool in studying the way viruses interact with hosts. This tool may speed the discovery of treatments for virus-caused diseases that plague humans.
“The RNAi machinery is very similar between humans and C. elegans, and human viruses such as Influenza A virus and HIV are known to produce RNAi suppressors,†Ding said. “So now, the question is can we treat human viral diseases using chemical inhibitors of viral RNAi suppressors?â€
The methods outlined in the Nature paper are now being used to generate additional C. elegans strains for screening chemical compounds that inactivate RNAi suppressors associated with avian flu, HIV and others.
Additional Contacts:
# Shou-Wei Ding
The University of California, Riverside is a major research institution and a national center for the humanities. Key areas of research include nanotechnology, genomics, environmental studies, digital arts and sustainable growth and development. With a current undergraduate and graduate enrollment of nearly 17,000, the campus is projected to grow to 21,000 students by 2010. Located in the heart of inland Southern California, the nearly 1,200-acre, park-like campus is at the center of the region’s economic development. Visit www.ucr.edu or call 951-UCR-NEWS for more information. Media sources are available at http://www.mediasources.ucr.edu/.
Posted under HIV Research, North America, Press Releases | Comments Off
Global Health Leaders React to G8′s First-Ever Call for More Investment in Microbicides to Protect Women from HIV
Last Updated on Saturday, 9 July 2005 04:35 Written by admin Saturday, 9 July 2005 04:35
Joint Statement From:
Zeda Rosenberg, CEO, International Partnership for Microbicides (IPM)
Polly Harrison, Director, Alliance for Microbicide Development (AMD)
Lori Heise, Director, Global Campaign for Microbicides (GCM)
Manju Chatani, Coordinator, African Microbicides Advocacy Group (AMAG)
GLENEAGLES, Scotland, July 8, 2005 /PRNewswire/ — This year’s G8 summit in Gleneagles marks an important milestone in the industrialized world’s commitment to global health and development. The G8 has taken an important step today by recognizing for the first time the urgent need to develop a safe and effective microbicide and calling for advance purchase commitments and other innovative financing tools to encourage increased investment in microbicide and vaccine research and development. An effective microbicide would give women the power to protect themselves from HIV infection and stop the feminization of the HIV epidemic. Microbicides are especially needed in sub-Saharan Africa, where three-quarters of the world’s HIV-infected women live.
“The news that the G8 Gleneagles Africa statement has highlighted the importance of HIV prevention and specifically mentioned microbicides is a great boost to those of us who have been working for many years to develop an effective microbicide,” Dr. Janet Darbyshire, Director of the UK Medical Research Council’s Clinical Trials Unit. “The UK government through the Department for International Development and Medical Research Council (MRC) has been strongly supportive of the Microbicide Development Programme co-ordinated by the MRC Clinical Trials Unit and Imperial College, involving many collaborators in Africa and the United Kingdom.”
“We are gratified that the G8 has recognized the importance of microbicides in the fight against HIV/AIDS. I am confident that with political leadership, sufficient financial resources, collaborative efforts and product development expertise, a microbicide will be available to women in Africa to help control the HIV/AIDS pandemic,” said Dr. Zeda Rosenberg, Chief Executive Officer of the International Partnership for Microbicides.
“Now the G8 must follow through on its commitment and dramatically scale up funding for research and development of microbicides, which could save millions of lives. Investment in microbicides must double to US$280 million per year,” said Dr. Polly Harrison, Director of the Alliance for Microbicide Development.
“Today’s announcement from the G8 is an important step forward for the world’s women, who desperately need a method of HIV prevention that they can initiate, rather than rely on men’s willingness to be faithful or to use condoms,” said Lori Heise, Director of the Global Campaign for Microbicides.
Manju Chatani, the Coordinator of the African Microbicides Advocacy Group, added, “We believe a microbicide will provide a powerful new option for African women to protect themselves. We encourage the G8 to also support efforts towards preparing for future access to effective microbicides, now.”
Microbicides are products such as gels or creams that could be applied topically to the vagina, reducing transmission of HIV during sexual intercourse. Studies of various formulations are underway and include a vaginal ring designed to release a microbicide slowly over time. An effective microbicide could kill or otherwise immobilize HIV; form a barrier between the virus and vaginal tissue; boost the vagina’s natural defenses against HIV; or prevent the virus from replicating after it enters the cells in the vagina.
The African Microbicides Advocacy Group (AMAG) is a coalition of microbicide advocates from organisations and institutions based and/or working in various African countries. AMAG was launched in March 2004 at the International Microbicides Conference 2004. http://www.global-campaign.org/amag.htm
The Alliance for Microbicide Development is a global, multisectoral, multidisciplinary coalition founded to foster the development of microbicides to prevent HIV/AIDS through advocacy, communication, convening and addressing critical problems in practice and policy. http://www.microbicide.org/
The Global Campaign for Microbicides is an international movement of activists, citizens and non profit organizations dedicated to accelerating access to new HIV prevention tools, especially for women. http://www.global-campaign.org/
The International Partnership for Microbicides was established to accelerate the development and accessibility of microbicides to prevent the transmission of HIV. Through the screening of compounds, designing optimal formulations, establishing manufacturing capacity, developing trial sites and conducting access studies, the organization works to improve the efficiency of all efforts to develop and deliver safe and effective microbicides as soon as possible. http://www.ipm-microbicides.org/
http://www.microbicide.org
http://www.global-campaign.org
Source: International Partnership for Microbicides
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