Is cytokeratin a tumor marker?

Is cytokeratin a tumor marker?

A cytokeratin is a type of tumor marker.

What is cytokeratin positive?

Background: Cytokeratins are specific markers of epithelial cancer cells in bone marrow. We assessed the influence of cytokeratin-positive micrometastases in the bone marrow on the prognosis of women with breast cancer.

What does cytokeratin stain for?

Cytokeratin immunostains will stain most carcinomas, carcinoid tumors, epithelial organs, etc. Useful in differentiating sarcomatoid carcinoma from sarcoma.

What is the difference between keratin and cytokeratin?

In 2006 a new systematic nomenclature for mammalian keratins was created, and the proteins previously called “cytokeratins” are simply called keratins (human epithelial category). For example, cytokeratin-4 (CK-4) has been renamed keratin-4 (K4).

What is keratin do?

Overview. Keratin is the type of protein that makes up your hair, skin, and nails. Keratin can also be found in your internal organs and glands. Keratin is a protective protein, less prone to scratching or tearing than other types of cells your body produces.

What is cytokeratin and vimentin?

Vimentin is one of the other important IF proteins of the mesenchymal cells and is the key motif of the cytoskeleton. Increased expression of cytokeratin and vimentin is associated with development and progression of cancers.

Why are antibodies used in staining?

Primary antibodies provide specific recognition of the target antigen. The use of primary antibodies conjugated to fluorophores, without secondary antibodies, is known as direct staining. Direct staining methods save time and allow multiplexing using antibodies raised in the same host species.

How do you stain with antibodies?


  1. Aliquot 100 µl of 1-100 X 105 cells (use wash buffer above with 0.1% NaN3 added) in Falcon® #2052 or #2054 tubes on ice.
  2. Add 20 µl MAb (1-10 µg/ml final concentration, depending on Mab).
  3. Incubate 10 – 30 min on ice.
  4. Wash again as above with 2 ml cold azide buffer.
  5. Resuspend in 100 µl of Secondary Antibody (eg.

Why do we need keratin?

Keratin is a type of structural protein found in your hair, skin, and nails ( 1 ). It’s especially important for maintaining the structure of your skin, supporting wound healing, and keeping your hair and nails healthy and strong ( 1 ).

What kind of cancer is cytokeratin 19 associated with?

Cytokeratin 19 is a useful marker in differentiating malignant from benign thyroid conditions particularly the classical papillary thyroid carcinoma CK19 expressed in several cancer types.

Is there a link between cytokeratin-19 and ESCC?

Serum cytokeratin-19 fragment (Cyfra211) and neuron specific enolase (NSE) levels in males and females had no correlation with age. Elevated preoperative SCC and CYFRA 21-1 levels were associated with aggressive cancer behavior in esophageal squamous cell carcinoma (ESCC).

How are cytokeratin markers used in the clinic?

The three most applied cytokeratin markers used in the clinic are tissue polypeptide antigen (TPA), tissue polypeptide specific antigen (TPS), and CYFRA 21-1. TPA is a broad spectrum test that measures cytokeratins 8, 18, and 19. TPS and CYFRA 21-1 assays are more specific and measure cytokeratin 18 and cytokeratin 19, respectively.

What is the role of keratin 19 in breast cancer?

Keratin 19 regulates cell cycle pathway and sensitivity of breast cancer cells to CDK inhibitors. Cytokeratin 19 is a useful marker in differentiating malignant from benign thyroid conditions particularly the classical papillary thyroid carcinoma