The researchers next will turn to analyzing the presence of myoferlin in samples from numerous
human tumor types available in an Ohio State tissue bank, which will allow them to compare protein levels in tumors to clinical outcomes for the patients who provided the samples.
Not exact matches
To determine how the cells switch from one
type to another, they took three
human uterine carcinosarcoma samples and sequenced the genomes of cells in two parts of each
tumor: the carcinoma and sarcoma components.
Although mutations can occur anywhere in the
human intestine, certain
types of colorectal cancer tend to develop in particular locations, suggesting that additional, nongenetic factors contribute to
tumor growth and dictate where polyps appear.
Desgrosellier said the team will follow up with mouse models containing
tumor fragments from patients to better reflect the diversity of cell
types present in
human disease.
In earlier studies involving animal models and
human cancer cell lines, researchers found that breast cancer spreads when three specific cells are in direct contact: an endothelial cell (a
type of cell that lines the blood vessels), a perivascular macrophage (a
type of immune cell found near blood vessels), and a
tumor cell that produces high levels of Mena, a protein that enhances a cancer cell's ability to spread.
To streamline this process, Uhlén's team has created standardized arrays containing microscopic samples from 48 kinds of normal
human tissue and 20
types of
tumors.
Tamayo and team tested REVEALER using The Cancer Genome Atlas (TCGA), the National Institutes of Health's database of genomic information from more than 500
human tumors representing many cancer
types.
These are two pathways that are very commonly mutated in
human tumors, and we try to understand where those pathways are mutated, which
type of
tumors, what are the mutations that co-occur with mutations in those pathways; and try to understand, if we try to inhibit those pathways, what can we expect in patients.
In
humans, an increased genetic signature of these cells correlated with better outcomes in a variety of
tumor types.
«It was hard to find a single microRNA in the
human genome that wasn't differentially turned on or off across different
tumor types in different tissues,» Golub says.
Using all the existing data that was available, Andrechek, along with MSU doctoral student Daniel Hollern, analyzed 1,172 mouse mammary
tumor samples from 26 different preclinical models and was able to compile one of the largest databases to show which strains of mice were best suited to study a particular
type of
human breast cancer.
In a report on one of the two findings, published online Sept. 20 in Acta Neuropathologica, the investigators identified alterations in a protein known as ATRX in
human brain
tumors that arise as part of a genetically inherited condition known as neurofibromatosis
type 1 (NF1).
Using
tumor models for both astrocytoma and oligodendroglioma, which are very similar to
human tumors, they could show that one and the same cell
type, called oligodendrocyte precursor cells, could give rise to both
tumor forms.
Researchers from Uppsala University, Sweden, and the Broad Institute, USA, have identified both similarities and differences between a single
tumor type in multiple dogs breeds; a finding they believe parallels the situation in the cancer of
human patients.
And with non-melanoma skin cancers being the most frequent
human tumors, there is clearly a tremendous need to understand the underlying molecular mechanisms, to allow the development of drugs to treat these
types of cancer.
«Our work outlines the genetic similarities of the tissue and cells in different
types of
tumors and shows the strong relationships mice can have to other
human cancers too.»
Using cultured cells derived from
human tumors of the breast and prostate gland, they confirmed that the IL6R / STAT3 / miR -34 a feedback loop is also activated in other
tumor types.
These
types of engineered
tumors are much more difficult to treat than
human tumors implanted in mice, because they suppress the immune response against them.
By analyzing a dataset of
human immune cells stimulated with interferon — a signaling protein created in response to pathogens or
tumor cells — the team could precisely identify which genes were switched on in each of 13 responding cell
types.
Type, density, and location of immune cells within
human colorectal
tumors predict clinical outcome.
Dendritic cells reconstituted with
human telomerase gene induce potent cytotoxic T - cell response against different
types of
tumors.
Nivolumab is an antibody (a
type of
human protein) that is being tested to see if it will allow the body - s immune system to work against
tumor cells.
To develop the methodology, the group analyzed the molecular profiles of
human embryonic stem cells and compared them with data for 12,000 samples of 33 different
tumor types held by The Cancer Genome Atlas (TCGA), a U.S. public database.
Embryonic stem cells derived from
human blastocysts have the key advantage of pluripotency, meaning that they form nearly all cell
types but also have the disadvantage of forming
tumors in vivo, which may limit clinical application to tissue engineering rather than cell transplantation.
Important features of XMRV biology include (1) tropism for a variety of cell lines, including prostate cancer DU145 and LNCaP cells [27], [43], [48], and
human neural cell
types [57], (2) adaptations that promote growth in prostate epithelium and
human - derived prostate cancer cell lines including an androgen response element in the promoter region [58] and downregulation of APOBEC3G [59], and (3) cellular effects with potential oncogenic properties including increased
tumor aggressiveness mediated by downregulation of p27 [60] and differential regulation of several microRNAs [61].
Examples include the study of allelic variation in the
human genome and the development of computational methods for the discovery of cancer - associated genes and diagnostic cancer markers using genomic profiles derived from different
tumor types.
T - VEC, recently approved for the treatment of advanced melanoma, is an oncolytic herpes simplex virus
type 1 engineered to replicate selectively in
tumor cells and express
human granulocyte - macrophage colony - stimulating factor.
The primary finding of the research was that yeast with high levels of sugar were found to overstimulate the same
types of proteins that are commonly mutated inside
human tumors.
«The
types of cancer are very similar to those diagnosed in
humans and similar cancers appear in both small animal species such as lymphoma and skin
tumors.
«Because many
types of
tumors that affect people also occur naturally in dogs, focused ultrasound could not only augment the traditional approach to cancer in dogs but also advance our understanding of
human cancer.»
There are many differences between mammary
tumors in animals and breast cancer in
humans, including
tumor type, malignancy, and treatment options
Cancers in dogs, such as bone cancer, lymphoma and many other
types of
tumors, are almost identical to those same kinds found in
humans and they tend to develop faster and run their course quicker, so it's an ideal way to see if a certain therapy will work.