We target tumours by exploring how the proteins found on
the cancer cell surface can be utilised to inhibit growth or kill tumours.
In this study, the SIgN team discovered for the first time that the integrity of p53 affects the production of a special cell surface protein called Major Histocompatibility Complex (MHC) class I. MHC class I molecules on
the cancer cell surface serve as targets for the immune system.
Triple negative breast cancers are those that do not have estrogen or progesterone receptors, and do not have an excess of the HER2 protein on
the cancer cell surfaces.
Not exact matches
Weeks later, Yee realized that he didn't have the equipment he needed to pluck out of Ziskin's blood the rare (perhaps one in 100,000) T
cells that could identify the subtle peptide markers on the
surface of her
cancer cells and attack the disease.
His work indicates that this
cell surface marker could serve as a target for a novel brain
cancer vaccine or T -
cell therapies engineered to recognize and kill tumors carrying that neoantigen.
But T -
cells appear to be even more promising, because they can react to abnormalities inside
cancer cells rather than just on their
surfaces.
In many very invasive forms of breast
cancer, the
cells have too much of the receptor HER2 on their
surface.
What they discovered was that an inflammatory factor known as TGF - beta (transforming growth factor - beta) can give
cancer cells properties of immune
cells by supplying the
surface of the
cancer cell with a receptor that normally only exists on the white blood
cells that travel through the lymphatic system.
Other researchers have already loaded hollow origami structures with drugs to target specific types of
cancer cells, created DNA «robots» that walk across
surfaces, and mimicked the shape of viruses.
MP1 interacts with lipids that are abnormally distributed on the
surface of
cancer cells, creating gaping holes that allow molecules crucial for
cell function to leak out.
Although some
cancers — particularly those that are rife with mutations like lung
cancer or melanoma — create more tangible targets on the
surface of
cells for the immune system to recognize and attack, other malignancies such as prostate and pancreatic
cancers have proved more intransigent.
Most
cancer vaccines developed to date have been designed to recognize and attack a specific known molecule — such as a
cell -
surface receptor — that is likely to be found on cancerous
cells in any patient with that type of tumor.
Instead of displaying the full complement of incriminating proteins on the tumor
cell's
surface, the dog
cancer displays just a few, obfuscating the invasion underway.
«The antibody binds to a specific protein, called CD44s, which is expressed on the
surface of pancreatic
cancer stem
cells.
«
Cell -
surface receptor offers promising breakthrough for pancreatic
cancer patients.»
Liang Xu, Ph.D. member of the KU
Cancer Center's Drug Discovery, Delivery and Experimental Therapeutics program and associate professor of molecular biosciences at KU, has discovered that targeting a
cell -
surface receptor called «CD44s» can block pancreatic tumor formation and recurrence after radiotherapy.
But when PD - 1 binds to proteins called PD - L1 and PD - L2 on the
surface of certain
cancer cells, the T
cells essentially become paralyzed: the immune attack on
cancer is called off.
They found that besides traveling in the bloodstream, melanoma
cells could also move along the abluminal, or outside,
surface of blood vessels by way of angiotropism, a biological interaction between the
cancer cells and the blood vessel
cells.
They have also isolated specific receptors on the
surfaces of
cancer cells that green tea compounds may interact with.
Researchers from BUSM and the University of Cyprus compared the markers on the
surface of the
cancer cells to gene expression profile of breast tumors deposited by researchers in international public databases and found that a molecule named IL13RA2 (IL13R alpha2) was abundant in metastatic or late - stage BLBC.
Cadherin - 22 is located on
cell surfaces, allowing hypoxic
cancer cells to stick together and migrate collectively as a group, said Uniacke.
«Beta blockers may lead to new novel triple negative breast
cancer treatments: New research suggests that adrenaline can act on tumor
cells via a
cell surface receptor called the beta2 - adrenoceptor and that changes in signaling within the
cell make it highly invasive.»
To determine whether endothelial
cells — the
cells that line the interior
surface of blood vessels — directly influence breast
cancer cell growth, they then created unique organotypic models of lung and bone marrow microvascular niches, in which endothelial
cells formed blood vessel - like structures in culture as they would in the original organ.
The new study revealed that pancreatic
cancer cells not only send signals that make macrophages produce abnormal amounts of dectin - 1
surface receptors, but also that make tumor
cells themselves express high levels of galectin - 9.
Triple - negative breast
cancers are those whose
cells lack estrogen receptors and progesterone receptors, and do not have an excess of the HER2 protein on their
surfaces.
The team, based at UCL, had already found that prostate
cancer cells have more of the NAALADL2 molecule on their
surface compared to
cells from healthy tissue.
A pancreatic
cancer vaccine could be made of whole pancreatic
cancer cells, treated so they can't replicate, but modified to present certain molecules on the
surface of those
cells.
It's also unclear at this point, he says, exactly how annexin A2 encourages pancreatic
cancer cells to release Sema3D, but the researchers suspect annexin A2 may act like a bodyguard to Sema3D, sheltering and guiding the protein as it makes its way toward an exit at the
cell surface.
PD - 1 (programmed
cell death protein 1) is a receptor on the
surface of T
cells (the white blood
cells that are part of the immune system), while PD - L1 (programmed death - ligand 1) is a molecule that binds to PD - 1 and is often over-expressed on the
surface of
cancer cells, enabling them to evade the immune system and allow
cancer to grow and spread.
The experimental drug cediranib blocks the
cell surface receptor VEGF, which stimulates the growth of new blood vessels to feed the growth of tumours,» explains study researcher Dr Paul Symonds, of the Department
Cancer Studies & Molecular Medicine at the University of Leicester, UK.
Toner pumped samples of whole blood through the channels, which were coated with an antibody designed to trap any
cancer cell that carries a common
surface protein, much as flypaper snags pesky insects.
The problem with viruses that typically cause
cancer, though, is that they tend hide out of reach — inside of rather than on the
surface of
cells.
Cancer can be chillingly personal, right down to your
cell surface.
Ovarian
cancer researchers have identified a protein biomarker expressed on the
surface of tumour
cells in high - grade serous ovarian
cancer, the most common and lethal subtype of the disease.
These
cells have different factors on their
surfaces which determines how «sticky» the
cells are and whether they are responsible for mediating the
cancer cells binding to the blood vessel walls.
They may also induce the production of antibodies that bind to molecules on the
surface of
cancer cells.
«When a
cancer cell comes into contact with it, a protein on the
cell's
surface, known as APP, activates DR6.
Comparing the markers on these stem
cells with those on the
surfaces of
cancer cells, Johnson adds, will also help scientists determine if stem
cells contribute to prostate malignancies.
HER2 - positive breast
cancer, which is associated with poor prognosis, has been traced to an excess of signaling through receptors, or docking ports, called HER2 found on the
surface of certain mammary epithelial
cells.
In human medicine EGFR is frequently used as the target of
cancer immunotherapy because many
cancer cells bear this receptor on their
surface.
Though similar to healthy
cells,
cancer cells often display unique antigens on their
surface, which can be exploited to develop
cancer immunotherapies.
Since
cancer cells bear very specific antigens on the
surface, the corresponding antibodies bind to these molecules and thus inhibit tumor growth.
Although myeloma is, like leukemias and lymphomas, a
cancer involving white blood
cells known as lymphocytes, myeloma
cells don't traditionally express CD19 on their
surface because they arise from the most mature type of lymphocytes — plasma
cells.
Most integrin inhibitor drugs target their adhesive function and block them on the
surface of the
cancer cell.
The current study was based on previous studies in the laboratory of Nita Ahuja, M.D., director of the Sarcoma and Peritoneal
Surface Malignancy Program and professor of surgery at the Johns Hopkins University School of Medicine, which showed that guadecitabine limited the growth of colorectal
cancer cell lines when combined with irinotecan, says Azad.
T
cells are collected from the patient's blood and genetically engineered to express
cell -
surface proteins called CARs, which recognize specific molecules found on the
surface of
cancer cells.
One of the immunotherapeutic approaches that has been explored thus far relies on the use of monoclonal antibodies that specifically target a protein present on the
surface of prostate
cancer cells called prostate specific membrane antigen (PSMA) to elicit an anti-tumor immune response and control the
cancer.
They work by sticking to specific proteins found on the
surface of
cancer cells, flagging them up to be killed by the immune system.
In earlier research, Barbolina discovered that a fractalkine receptor — a protein found on the
cell surface — is expressed in the majority of ovarian
cancer cases.
The
cancer cell marker that Johnson and her team identified was a specific change in protein glycosylation, that is, a unique pattern of sugars decorating a protein found on the
cell surface.