Tumor protein p63 antibody, also known as transformation-related protein 63 is a protein that in humans is encoded by the TP63 gene. Many studies have shown that p63 is a sensitive (90%) and fairly specific marker for squamous cell carcinoma and may be used in distinguishing poorly differentiated lung squamous cell carcinomas (SqCC) from adenocarcinomas. p63 has been shown to mark approximately 5 to 10% of lung adenocarcinomas.
p63 is a nuclear stain and has been specially titered for lung SqCC. This optimized p63 antibody is part of the PulmoPanel™ set used for discriminating between lung adenocarcinoma vs. lung SqCC.
A combination of p63 and TRIM29 can also be utilized for lung SqCC and studies have shown that when p63 and/or TRIM29 is expressed in lung SqCC, a 95.4% sensitivity and 100% specificity was achieved, if Napsin A and TTF-1 were both negative in the same case.
*Part of the PulmoPanel™ Kit for diagnosing lung cancer, to order use Cat. No. PPM 435 AAK.
The PulmoPanel™ Kit includes: CK5, Desmoglein 3, Napsin A, p63, TRIM29 and TTF-1.
Lung squamous cell carcinoma
1. Iacono ML, et al. p63 and p73 Isoform Expression in Non-small Cell Lung Cancer and Corresponding Morphological Normal Lung Tissue. J Thorac Oncol. 2011 Mar; 6 (3):473-81.
2. Tacha D, Yu C, Haas T. TTF-1, Napsin A, p63, TRIM29, Desmoglein-3 and CK5: An Evaluation of Sensitivity and Specificity and Correlation of Tumor Grade for Lung Squamous Cell Carcinoma vs. Lung Adenocarcinoma. Modern Pathology; USCAP, 2011 (Abstract Accepted)
3. Mukhopadhyay S, Katzenstein AL. Subclassification of non-small cell lung carcinomas lacking morphologic differentiation on biopsy specimens: Utility of an immunohistochemical panel containing TTF-1, napsin A, p63, and CK5/6. Am J Surg Pathol. 2011 Jan; 35(1):15-25.
4. Tacha D, Zhou D, Henshall-Powell RL. Distinguishing Adenocarcinoma from Squamous Cell Carcinoma in Lung Using Double Stains p63+ CK5 and TTF-1 + Napsin A. Modern Pathology; Pathology Volume 23, Supplement 1, Feb 2010; Abstract 1852, page 222A.
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6. Uke M, et al. The use of p63 as an effective immunomarker in the diagnosis of pulmonary squamous cell carcinomas on de-stained bronchial lavage cytological smears. Cytopathology. 2010 Feb; 21(1):56-63. Epub 2009 Sep 9.
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