ironjustice
2010-10-23 11:00:43 UTC
Towards a unifying, systems biology understanding of large-scale
cellular death and destruction caused by poorly liganded iron:
Parkinson's, Huntington's, Alzheimer's, prions, bactericides,
chemical toxicology and others as examples.
Kell DB.
Arch Toxicol. 2010 Aug 17.
School of Chemistry and the Manchester Interdisciplinary Biocentre,
The University of Manchester, Manchester, M1 7DN, UK,
***@manchester.ac.uk.
Abstract
Exposure to a variety of toxins and/or infectious agents leads to
disease, degeneration and death, often characterised by circumstances
in which cells or tissues do not merely die and cease to function but
may be more or less entirely obliterated.
It is then legitimate to ask the question as to whether, despite the
many kinds of agent involved, there may be at least some unifying
mechanisms of such cell death and destruction.
I summarise the evidence that in a great many cases, one underlying
mechanism, providing major stresses of this type, entails continuing
and autocatalytic production (based on positive feedback mechanisms)
of hydroxyl radicals via Fenton chemistry involving poorly liganded
iron, leading to cell death via apoptosis (probably including via
pathways induced by changes in the NF-κB system).
While every pathway is in some sense connected to every other one,
I highlight the literature evidence suggesting that the degenerative
effects of many diseases and toxicological insults converge on iron
dysregulation.
This highlights specifically the role of iron metabolism, and the
detailed speciation of iron, in chemical and other toxicology, and
has significant implications for the use of iron chelating substances
(probably in partnership with appropriate anti-oxidants) as
nutritional
or therapeutic agents in inhibiting both the progression of these
mainly degenerative diseases and the sequelae of both chronic and
acute
toxin exposure.
The complexity of biochemical networks, especially those involving
autocatalytic behaviour and positive feedbacks, means that multiple
interventions (e.g. of iron chelators plus antioxidants) are likely
to
prove most effective.
A variety of systems biology approaches, that I summarise, can
predict
both the mechanisms involved in these cell death pathways and the
optimal sites of action for nutritional or pharmacological
interventions.
PMID: 20967426
Who loves ya.
Tom
Jesus Was A Vegetarian!
http://tinyurl.com/2r2nkh
Man Is A Herbivore!
http://tinyurl.com/a3cc3
DEAD PEOPLE WALKING
http://tinyurl.com/zk9fk
cellular death and destruction caused by poorly liganded iron:
Parkinson's, Huntington's, Alzheimer's, prions, bactericides,
chemical toxicology and others as examples.
Kell DB.
Arch Toxicol. 2010 Aug 17.
School of Chemistry and the Manchester Interdisciplinary Biocentre,
The University of Manchester, Manchester, M1 7DN, UK,
***@manchester.ac.uk.
Abstract
Exposure to a variety of toxins and/or infectious agents leads to
disease, degeneration and death, often characterised by circumstances
in which cells or tissues do not merely die and cease to function but
may be more or less entirely obliterated.
It is then legitimate to ask the question as to whether, despite the
many kinds of agent involved, there may be at least some unifying
mechanisms of such cell death and destruction.
I summarise the evidence that in a great many cases, one underlying
mechanism, providing major stresses of this type, entails continuing
and autocatalytic production (based on positive feedback mechanisms)
of hydroxyl radicals via Fenton chemistry involving poorly liganded
iron, leading to cell death via apoptosis (probably including via
pathways induced by changes in the NF-κB system).
While every pathway is in some sense connected to every other one,
I highlight the literature evidence suggesting that the degenerative
effects of many diseases and toxicological insults converge on iron
dysregulation.
This highlights specifically the role of iron metabolism, and the
detailed speciation of iron, in chemical and other toxicology, and
has significant implications for the use of iron chelating substances
(probably in partnership with appropriate anti-oxidants) as
nutritional
or therapeutic agents in inhibiting both the progression of these
mainly degenerative diseases and the sequelae of both chronic and
acute
toxin exposure.
The complexity of biochemical networks, especially those involving
autocatalytic behaviour and positive feedbacks, means that multiple
interventions (e.g. of iron chelators plus antioxidants) are likely
to
prove most effective.
A variety of systems biology approaches, that I summarise, can
predict
both the mechanisms involved in these cell death pathways and the
optimal sites of action for nutritional or pharmacological
interventions.
PMID: 20967426
Who loves ya.
Tom
Jesus Was A Vegetarian!
http://tinyurl.com/2r2nkh
Man Is A Herbivore!
http://tinyurl.com/a3cc3
DEAD PEOPLE WALKING
http://tinyurl.com/zk9fk