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.
We target tumours by exploring how the proteins found
on the cancer cell surface can be utilised to inhibit growth or kill tumours.
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.
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.
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.
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 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.»
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.
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 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.
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.
SLex is also found
on the
surface of lung
cancer cells and colon
cancer cells, which are also seeking E-selectin sites to attach themselves to as they spread around the body.
But the full potential of CARs for treating solid tumors has not been reached because they have targeted molecules found
on the
surface of both normal
cells and
cancer cells, resulting in serious side effects.
Blocking a protein found
on the
surface of ovarian
cancer cells could prevent or reduce the spread of the disease to other organs, according to new research at the University of Illinois at Chicago.
Working in mouse models of breast
cancer and breast tumor samples from patients, Longmore and his colleagues showed that a protein that sits
on the
surface of tumor
cells, called DDR2, binds to collagen and activates a multistep pathway that encourages tumor
cells to spread.
First, the P - Selectin proteins
on the platelet membrane bind to the CD44 proteins
on the
surface of the
cancer cell, locking it into place.
By engineering red blood
cells to have «sticky» proteins
on their
surface, a team of researchers has given the
cells the ability to carry anything from drugs to treat immune disorders or
cancer to radioactive molecules used in imaging of blood vessels.
The nanoparticle has interleukin 2
on its
surface, so when the protein is around it acts as a switch, a contact with the
cancer cell to bind to the receptor and to carry out its biological action.
These carry some of the same proteins
on their
surface as many
cancer cells, says Wu.
Cancer cells settle to the bottom of the well, where they selectively bind to the antibodies based
on their
surface markers (unlike other devices, the chip can also trap tiny structures called exosomes produced by
cancers cells).
Each well holds a specific antibody that will bind selectively to one type of
cancer cell type, based
on genetic markers
on its
surface.
This helps to ensure that the drugs can reach the
cancer cells on the
surface and also inside the core of the tumour.»