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C8541

Sigma-Aldrich

Monoclonal Anti-Cytokeratin Peptide 18 antibody produced in mouse

clone CY-90, ascites fluid

Synonym(s):

Monoclonal Anti-Cytokeratin Peptide 18

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About This Item

MDL number:
UNSPSC Code:
12352203
NACRES:
NA.41

biological source

mouse

Quality Level

conjugate

unconjugated

antibody form

ascites fluid

antibody product type

primary antibodies

clone

CY-90, monoclonal

contains

15 mM sodium azide

species reactivity

wide range

technique(s)

indirect immunofluorescence: 1:800 using formalin-fixed, paraffin-embedded sections of human tissue
western blot: suitable

isotype

IgG1

shipped in

dry ice

storage temp.

−20°C

target post-translational modification

unmodified

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General description

Cytokeratin 18 (45 kDa) is the primary type I keratin expressed in simple epithelial cells. Epithelial cells and their derivatives characteristically contain intermediate filaments (IFs) composed of about 20 related polypeptides with molecular weights between 40,000-69,000. Each epithelial tissue has a specific and stable pattern of expression of some of these cytokeratin subunits. Epithelium derived tumors maintain the expression of the cytokeratins found in the normal tissue of origin. Therefore, carcinomas can be identified and classified by immunocytochemical staining with antibodies that react specifically with cytokeratins.
Monoclonal Anti-Cytokeratin Peptide 18 (mouse IgG1 isotype) is derived from the hybridoma produced by the fusion of mouse myeloma cells and splenocytes from an immunized mouse. Cytokeratin 18 (CK18)/keratin 18 is a structural protein and is present in single-layer epithelia. It is located on human chromosome 12q13.

Specificity

The antibody reacts specifically with a wide variety of simple epithelia (e.g. intestine, respiratory and urinary systems, liver, and glandular epithelia). It does not react with stratified squamous epithelia (e.g. esophagus or epidermis) or with non-epithelial cells.

Immunogen

human epidermal carcinoma A-431 and MCF-7 human breast cancer cell lines.

Application

Monoclonal Anti-Cytokeratin Peptide 18 antibody produced in mouse has been used in:
  • immunofluorescence
  • fluorescence microscopy
  • confocal fluorescence microscopy
  • immunolabelling
  • histoblots

Biochem/physiol Actions

Keratins help to maintain structural integrity. They also control Fas?mediated apoptosis and regulate cell size and protein synthesis. Cytokeratin 18 (CK18) plays a major role in the development of lung cancer. It acts as a therapeutic target for non-small cell lung cancer (NSCLC). CK-18 is considered as a promising plasma biomarker to identify patients with HELLP (hemolysis, elevated liver enzymes, low platelets) syndrome.

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

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Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Multipotent progenitor cells can be isolated from postnatal murine bone marrow, muscle, and brain
Jiang Y, et al.
Experimental Hematology, 30(8), 896-904 (2002)
Role of extracellular signal-regulated kinase pathway in RRR-alpha-tocopheryl succinate-induced differentiation of human MDA-MB-435 breast cancer cells
You H, et al.
Molecular Carcinogenesis, 33(4), 228-236 (2002)
H Inada et al.
The Journal of cell biology, 155(3), 415-426 (2001-10-31)
Keratin 8 and 18 (K8/18) are the major components of intermediate filament (IF) proteins of simple or single-layered epithelia. Recent data show that normal and malignant epithelial cells deficient in K8/18 are nearly 100 times more sensitive to tumor necrosis
Immuno-electron microscopic localisation of caveolin 1 in human placenta
Byrne S, et al.
Immunobiology, 212(1), 39-46 (2007)
Matthew J Lawson et al.
Royal Society open science, 8(11), 211067-211067 (2021-11-06)
Micro-computed tomography (µCT) provides non-destructive three-dimensional (3D) imaging of soft tissue microstructures. Specific features in µCT images can be identified using correlated two-dimensional (2D) histology images allowing manual segmentation. However, this is very time-consuming and requires specialist knowledge of the

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