Microarrays and Climate Change

From  Technology Review, new applications of genomics tools, in this case microarray technology, to model the effects of climate change on marine species at the gene expression level:

Using novel genomic technology, marine biologists have found troubling
clues that marine life could be extremely vulnerable to climate change.
By mimicking future ocean climes and using gene chips to detect how
marine organisms respond, the researchers can evaluate how well
different organisms deal with environmental stress. The findings, while
still preliminary and incomplete, are worrisome…

…So far, the team has focused its attention on a set of proteins, known
as heat-shock proteins, which kick in when an animal is under stress.
Almost all animals carry copies of these proteins, which can repair
other proteins that have been bent out of shape by heat and additional
environmental stresses. According to early results from gene-chip
studies, sea-urchin larvae raised at current carbon levels activate
their heat-shock proteins when faced with warming water temperatures.
But larvae raised at the best-case-scenario carbon level no longer
activate these genes under stress and therefore can’t respond to a
warming climate. "I don’t want to say we will lose all sea urchins,"
says Hoffman. "But there will be some part of the population that can’t
develop."…

…Although it’s hard to predict exactly how that loss will affect the
environment, it’s likely to change the structure of the entire
ecosystem. Without algae-eating urchins, "you might predict that algae
will become dominant in a particular area, which then might affect
availability of fish that live there, which could affect the fishing
industry or even tourism," Hoffman says.

While illuminating some of the useful applications of genomics to conservation, I find this article a bit alarmist.  As pointed out by a commenter on the article, sea urchins have faced warmer oceans in the past and survived.  There will be transition and loss, and a new equilibrium. The key point for we humans is whether the transition and new equilibrium significantly affects us, and how.

A Titanic Discovery: the Body of Christ?

Apparently James Cameron thinks he has discovered the remains of Jesus Christ, and will reveal all on the Discovery Channel this Sunday.  Putting aside the likelihood of this Jesus being THE Jesus (I’m skeptical, to put it midly), this part of the article caught my attention:

The human remains were analyzed by Carney Matheson, a scientist at
the Paleo-DNA Laboratory at Lakehead University in Ontario, Canada.
Mitochondrial DNA examination determined the individual in the Jesus
ossuary and the person in the ossuary linked to Mary Magdalene were not
related.

You inherit your mitochondria from your mother only – it is in the ovum before fertilization.  So doesn’t this only tell us that the two individuals did not have the same mother?  Couldn’t they have the same father? Given maternal death rates in those days, it would hardly be unusual for a lot of families to include a variety of half-siblings.  Not sure what I’m missing here.

DNA and Ivory

Elephant
This article in the Globe and Mail (Genetic maps help unravel black market in ivory
) underscores the promise of genomics tools for compliance and enforcement of conservation laws. 

Dr. Wasser was asked to help in 2002, when the authorities in
Singapore seized a huge shipment of contraband ivory. Investigators
from a number of countries wanted to know where it had come from, and
he had developed a technique for matching the genetic material found in
tusks to the DNA found in feces of elephants, allowing him to pinpoint
where the tusks came from.

There were 532 tusks in the shipment, plus more than 40,000 hunks of
ivory already cut up to make the ivory seals. Between 3,000 and 6,500
elephants were likely killed to get that much ivory, the scientists
say.

The DNA showed the elephants came from central Zambia, a country
that has not been given permission to sell its ivory stockpiles
internationally. The government wanted to sell ivory taken from animals
killed prior to 1989, and said that only 135 elephants had been
illegally killed over the past 10 years.

Through genetic maps and the identification of biomarkers for specific populations, authorities will increasingly be able to determine the provenance of a given piece of ivory, can of abalone, or sockeye fillet.  A quick and reliable test for biomarkers of threatened species will tighten the screws on the middlemen who trade with dodgy sources, and that is a good thing. 

The original PNAS article is here.

Cracking the code – Genomic medicine is poised to improve therapies, diagnosis & prevention

An article about the importance of genomics to the future of medicine, in the Mayo Clinic Connection:

The term "genomics" refers to the study of genes and their function. The term "genome" refers to all the genetic information each of us has in our body.

The reason medical scientists are excited about genomics is that it opens new possibilities for designing more effective and safer treatments for many diseases. Mayo Clinic is among the leading medical centers worldwide in developing new genomic therapies through its newly opened Mayo Clinic Genomics Research Center. (opens in new window) 

Mayo Clinic physicians anticipate a day — not too far in the future — when physicians can look at a person’s genetic code and determine at a molecular level who’s at risk of disease, how aggressive that disease    will be, and which course of treatment will be best to treat the disease without harmful side effects.

 

Quote of the Day

From the Atlantic, quoting from the Double Helix by James Watson, co-discoverer of the structure of DNA:

My interest in DNA had grown out of a desire, first picked up while a senior in college, to learn what the gene was. Later, in graduate school at Indiana University, it was my hope that the gene might be solved without my learning any chemistry. This wish partially arose from laziness since, as an undergraduate at the University of Chicago, I was principally interested in birds and managed to avoid taking any chemistry or physics courses which looked of even medium difficulty. Briefly, the Indiana biochemists encouraged me to learn organic chemistry, but after I used a Bunsen burner to warm up some benzene, I was relieved from further true chemistry. It was safer to turn out an uneducated Ph.D. than to risk another explosion …

He then went on to meet Francis Crick and the rest, as they say, is history.  Is laziness an engine of success?  Here’s hoping.

in Cod we trust


Already world leaders in Salmon farming (though losing a bit of ground to the Chileans), the Norwegians are taking on the mighty cod.
Seed:

"TROMSOE, Norway (AFP)—After perfecting the art of salmon farming, Norwegians now hope to repeat the success with the trickier cod, which has been fished to near extinction in some parts of the world.
‘The success of the farmed salmon is part of the reason for the optimism we see in cod farming today,’ says Jens Oestli of the Norwegian Institute of Fisheries and Aquaculture Research in Tromsoe in northern Norway.
This Scandinavian nation began salmon farming in the 1960s. It now exports three times more farmed salmon than wild salmon, attaining 383,085 tonnes in 2005.
Cod farmers are now gambling on a similar boom."

Fish farmers in Canada are engaged in similar research, notably the Atlantic Cod Genomics And Broodstock Development project. Link.  It’s obvious to me that we need to move the large-scale exploitation of sea food into an agricultural model, away from our hunter gatherer ways, or we’ll lose these resources altogether.

The Blueprint of Life

An article on Blueprint  in BioscienceWorld.  Some key clips:

In fields ranging from medicine and biotechnology to agriculture and
the environment, the genomics revolution of the past decade is slowly
giving way to a systems-wide approach to solving biological questions,
as scientists are reminded that living organisms are comprised of more
than just their genes. Although invaluable, initiatives like the Human
Genome Project provide researchers with a parts list of life, but don’t
offer much information about how these parts assemble to create cells,
tissues and organisms.

Proteome projects have gone a long way toward filling in the gaps,
offering scientists information about protein content, numbers and
modifications. But in general, even these efforts can only provide a
snapshot of what is going on within a cell or organ, and do not always
tell researchers how these component parts interact to form complexes
and pathways critical to the function of life. More recently, however,
academic, government and commercial groups worldwide are addressing
this problem, finding ways to pull together biomolecular interaction
and pathway data from various sources into central repositories against
which researchers can test their hypotheses and probe for new insights…..

….Several groups, both commercial and academic, have undertaken a
systematic analysis of how biologically important molecules interact
both in the cell and in the lab….

….The largest of these databases, however, can be found in Canada at the
Blueprint Initiative (Blueprint), a research program of the Samuel
Lunenfeld Research Institute (SLRI) in Toronto, Ont.’s Mount Sinai
Hospital. Led by Christopher Hogue, PhD, Blueprint’s goal is to provide
researchers worldwide with free access to the information and tools
they need to improve their understanding of basic biology and human
health. To achieve this, they develop, host and maintain public
databases and bioinformatics software tools.

The central pillar of Blueprint’s efforts is the Biomolecular
Interaction Network Database (BIND), which captures data generated by
expensive research efforts in a computationally accessible format. BIND
records — which span molecular interactions, small-molecule chemical
reactions and genetic interaction networks — allow researchers to
identify macromolecular complexes, metabolic pathways and potential
clues to drug targets and leads. BIND is populated with interaction
data directly deposited by researchers or extracted from peer-reviewed
literature and a variety of genomic, proteomic, pathway and
disease-specific databases, which Blueprint curates and validates using
rigorous bioinformatics standards.

Currently, BIND houses more than 120,000 records of paired interactions
and complexes involving biopolymers (e.g., proteins, DNA and RNA) and
small molecules (e.g., lipids, nucleotides, sugars and ions). Using any
of more than 20 different search functions available through BIND’s Web
interface, researchers can identify interacting molecules on the basis
of their sequences, gene names, publication record and species origin,
to name a few, and examine how these interactions interplay with larger
molecular networks using BIND’s Interaction Viewer. Alternatively, new
features allow researchers to search relatively broad terms, such as
cancer, and pinpoint molecules of particular interest based on
characteristics such as subcellular co-localization, biological
function and binding partners…

….In August 2004, Blueprint’s Singapore node, Blueprint Asia, initiated a
collaboration with the Novartis Institute for Tropical Diseases
(Singapore, Singapore) (NITD) to assemble and curate known protein
interactions relevant to the biology of dengue virus.

“By examining information about dengue virus alongside other data in
the BIND repository, NITD scientists will gain a better understanding
of the dengue life cycle and of complex interactions with host proteins
leading to dengue hemorrhagic fever,” says Brian Yates, managing
director of Blueprint Asia. “This information can then be used to
develop drugs or vaccines to fight the disease.”

The collaboration is also expected to help NITD researchers identify
gaps in their information base, which could lead to the exploration of
new research avenues.

Almost regardless of the source, however, these interaction databases
and bioinformatics tools offer researchers insights into the function
of the cell and thereby offer the hope of turning molecular parts lists
provided by genome initiatives into blueprints of life.