But it turns out that a process called somatic cell nuclear transfer (SCNT) can sometimes
reactivate genes.
«The point of our study is to show that it's never too late to
reactivate the gene,» Bird says.
Mice with
the reactivated gene all showed better tissue healing when parts of their ears and paws were injured.
The team produced the first evidence that removing methylation, which are molecular tags that keep a mutant gene shut off, can
reactivate the gene and restore the fragile X syndrome neurons.
Not exact matches
Davies and Lineweaver suggest that
genes active in embryogenesis and switched off later may be
reactivated because of damage, causing the accelerated cell division of these rogue cancer cells.
In leukemia cells it is often the case that
genes are
reactivated that, in physiological terms, mediate the self - renewal of blood stem cells.
After four weeks of such training, researchers
reactivated the p25
gene in the mice for six weeks and then tested them to see if they recalled their shocking experiences.
«We think that these
genes, which are normally only expressed in the placenta to facilitate invasion, are becoming
reactivated in cancer cells and supporting invasion in this context too,» she says.
First, the
genes used for reprogramming are themselves known to trigger cancer, so if they were to
reactivate could cause tumours to form.
He is interested in
reactivating dormant
genes or changing the regulation of active
genes in embryos to bring back ancestral traits that have been lost in evolution.
If the
genes in the chick embryo are very close to those of an ancestral, nonavian dinosaur — and if the changes, over more than 150 million years, have been almost all in regulation of the
genes — then we could
reactivate the old pattern of regulation.
They found 204 that
reactivated cell proliferation, including two that affected nearly 2000
genes.
They discovered that crucial immune
genes are suppressed while the larva lives within the ladybug, but then
reactivate after the larva emerges.
However, cancer cells may instead be coaxed to turn back into normal tissue simply by
reactivating a single
gene, according to a study published June 18th in the journal Cell.
However, cancer cells may instead be coaxed to turn back into normal tissue simply by
reactivating a single
gene, according to a study that found that restoring normal levels of a human colorectal cancer
gene in mice stopped tumor growth and re-established normal intestinal function within only 4 days.
A study published by Cell Press November 7th in the journal Cell has revealed that an evolutionarily conserved
gene called Lin28a, which is very active in embryos but not in adults, enhances tissue repair after injury when
reactivated in adult mice.
They do this by
reactivating dormant
genes associated with pluripotency — a primitive state in which a cell has the potential to become any cell type in the body.
Species often dump
genes that they no longer use, he notes, but these
genes must have stuck around for Crotoniidae to
reactivate them.
The work led researchers to stumble upon another potential role for this
gene, which enhances the healing power of mice when
reactivated.
«Now, with the help of
gene therapy and stem cells we can help
reactivate the body's response to hypoxia and save limbs.»
BK: As you stated, all of these
genes are present in the human genome, but they are regulated differently, so finding mechanisms or therapies that can
reactivate them is critical.
When Simon's team deleted all H3.3
genes, they found that certain previously silenced transposable elements were
reactivated and continued to multiply in the genome — the result is the appearance of new genetic alleles and chromosomal abnormalities, both are familiar early events in the formation of tumors.
McGarvey, K. M.; Fahrner, J. A.; Greene, E.; Martens, J.; Jenuwein, T.; Baylin, S. B. Silenced tumor suppressor
genes reactivated by DNA demethylation do not return to a fully euchromatic chromatin state.
Preventing Cancer Sulforaphane - filled broccoli sprouts, in oral and topical form, are shown by Kimmel Cancer Center investigators to
reactivate a cancer - preventing
gene pathway in breast, lung, stomach, and skin cancers.
The newly formed hybrid cells
reactivate neuronal precursor
genes, and can thereby proliferate.
They discovered that increasing the random activity, or noise, associated with HIV
gene expression — without increasing the average level of
gene expression — can
reactivate latent HIV.
Walnuts and pecans contain ellagic tannins, which the gut transforms into ellagic acid, which converts a cancer cell back into fat - burning, which
reactivates the P53
gene, which causes the cell to commit apoptosis.
Many phytochemicals can
reactivate tumor suppressor
genes silenced by epigenetic modifications.