Affymetrix expands into personalized medicine The next big thing

Affymetrix expands into personalized medicine! Why because The next big thing in health care? is You the individual

personalized medicine is the place step every one wants to be. Roche recently went after Nimblegen for a small foothold in this developing ssicne field, Now its the turn of Affymetrix the leader in microarray DNA chips.

The company is trying to get ahead of the market curve by partnering with drug companies that are making precisely targeted medicines, tailored for patients who have specific gene variations

the company opened the Affymetrix Clinical Services Laboratory to analyze the genes in blood and saliva samples for pharmaceutical companies, diagnostic laboratory businesses and hospitals

Chikken Tikka and Alzheimer’s !!

Does eating a lotf of spicy curry eliminates the chances of geting cancer and diseases like Alzheimer’s thats a yummy proposition, I wish it was that easy, but apparently the Indian curry cuisines has the capacity to prevent the onset or delay the disease, but dont reach out for the qwik e mart yet. The curry doesnt do the job all by itself ,one of the key spices used ‘the Turmeric’ does that work, Ayurvedic medicine practioners has known the value of turmeric for a very long time, the stuff even finds its ways into soaps and cosmetics           

Scientists have for the first time isolated bisdemethoxycurcumin, the active ingredient of curcuminoids, a natural substance found in turmeric root that stimulates the immune system to destroy brain-clogging proteins that cause Alzheimer’s.

Researchers found that bisdemethoxycurcumin boosted immune cells called macrophages to clear amyloid beta. Amyloid beta is a peptide that forms the plaques found in Alzheimer’s disease.

Amyloid plaques are found outside the neurons. Two major pathways are involved in breakdown of APP (amyloid precursor protein) which makes the protein called B-amyloid protein. responsible for plaques .One pathway is normal and causes no problem. The second results in the changes seen in Alzheimer’s and in some of the other dementias.

Tougher times for Drug Resistant Bacteria

The Secret of how to prevent bacteria from developing drug resistance has been revealed in a new study.Drugs called bisphosphonates, widely prescribed for bone loss has been found to help in preventing an enzyme that helps in conjugation of bacteria, by help of which it derives drug resistance.

Many highly-drug resistant bacteria rely on an enzyme, called DNA relaxase, to obtain and pass on their resistance genes. Relaxase  plays a crucial role in conjugation as it is the gate keeper that starts and stops the movement of DNA between bacteria durig conjugation.

researchers at the University of North Carolina at Chapel Hill, have stopped the microbes’ ability to spread, among other advantageous mutations, resistance to antibiotics, by disabling the enzyme using molecules known as  bisphosphonates

The study by Matthew Redinbo and his associates is published in this week’s Proceedings of the National Academy of Sciences USA

The antibiotic-resistant Escherichia coli bacteria that were trying to pass their genes along, actually died when their DNA relaxase was shielded thus preveinting the spread of drug resistant bacteria andpossibility of more mutations.

The news is will bring fresh hopes at a stage when drugresistant strain of the bacteria Staphylococcus aureus infects over 1 million US hospital patients every year.

ENCODE consortium: forming background of why 3 billions bp are required for a human to survive not just the set of genes.

ENCODE consortium today published one in nature and 28 papers in genome research involving 35 groups from 80 organizations around the world, which promise to reshape our understanding of how the human genome functions. The findings totally challenge the tidy collection of independent genes , but sees as a complex networking system, along with regulatory elements and other types of DNA sequences that do not code for proteins, interact in overlapping ways not yet fully understood.

“This impressive effort has uncovered many exciting surprises and blazed the way for future efforts to explore the functional landscape of the entire human genome,” said NHGRI Director Francis S. Collins, M.D., Ph.D. “Because of the hard work and keen insights of the ENCODE consortium, the scientific community will need to rethink some long-held views about what genes are and what they do, as well as how the genome’s functional elements have evolved. This could have significant implications for efforts to identify the DNA sequences involved in many human diseases.”

Loads to come out of this …. few days back in nature cell biology there was a article stating small peptide regulators of actin-based cell morphogenesis encoded by a polycistronic mRNA in an eukaryote…

Plants too recognise its kin

Now wonder,  research proves that even plants recognise their kins. Researchers from McMaster University have found that plants go competitive when forced to share their own environment like pot, with strangers of the same species, but they’re accommodating when potted with their siblings.

How they do it???

When a different plant of same species is potted with a growing plant they start growing more roots, which allows them to grab water and mineral nutrients before their neighbours get them. when they share a pot with family i.e the sibiling 1st or 2 nd generation they don’t increase their root growth. Because differences between groups of strangers and groups of siblings only occurred when they shared a pot, the root interactions may provide a cue for kin recognition. The following is the paper that is being published on the same.

Dudley, S. A. and A. L. File (2007). Kin recognition in an annual plant. Biology Letters, in press.

Future of High Throughput Genome Sequencing

In Bangalore Bio 2007 LabIndia has introduced  SOLiD: Sequencing by Oligonucleotide Ligation and Detection which is the Future of High Throughput Sequencing.

“This is useful for those who want to do full genome sequencing. Whole genome projects will be more cost effective with this new instrument than they are today,” said Dr. Anupama Gaur, Team Leader Application Support, Labindia Instruments, Pvt. Ltd.

HistoGenetics has come up with Sequence Based Typing which has many advantages such as identifying many rare and new alleles. “Nearly 2000 alleles have been identified so far and it has been launched in the US and UK as of now” said Dr. Cereb Nezih, M.D., President and co-founder, Histogenetics, Inc.

Gene Expression is affected when cells are cultured in petri dish

When trying to figure out how different respond to drugs and other environemnts in the body scientists turn to cells. The cultured cells are grown in petri dishes now with the onset of tissue microarrays the process is getting more advanced

A new Brown University study shows that nerve cells grown in three-dimensional cultures use 1,766 genes differently compared to cells grown in standard two-dimensional petri dishes.

The research shows that culture techniques can significantly affect cell growth and function. cells grown in a laboratory in 3-D environments are more like cells grown in the ultimate 3-D environment – the human body.

“More and more, we’re seeing evidence that cells cultured in three dimensions look and behave more like cells in your body,” said Diane Hoffman-Kim, the University of Brown bioengineer who spearheaded the new study,

The study is published in the May edition of Tissue Engineering,

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