Thursday 22 December 2005
The deduced 162-amino acid PDPN protein (podoplanin) contains a putative transmembrane region, a protein kinase A (MIM.176911) phosphorylation site, and a protein kinase C (MIM.176960) phosphorylation site.
Expression in tissues
M2A (D2-40), as c-KIT, has frequently been used as markers of germ cell tumors. However, comparative studies of their immunoreactivities in human fetal gonads have been limited.
In 12-week fetuses, c-KIT immunoreactivity is weak, but M2A immunoreactivity is consistently strong.
At 15 and 18 weeks of gestation, c-KIT immunoreactivity is found in most germ cells.
D2-40 is expressed in Sertoli cells as well as in germ cells, but is not expressed in ovarian follicles undergoing meiosis.
D2-40 is also reactive in fetal Sertoli cells, but its expression is consistently weaker than in germ cells.
fetal testis 39 weeks
A comparison between D2-40 and c-KIT immunohistochemistry for the human fetal testis and ovary at the second trimester of gestation. Jin ZW, Kim YG, Yu HC, Murakami G, Fujimiya M, Cho BH. Okajimas Folia Anat Jpn. 2010 May;87(1):1-4. PMID: 20715565
Expression in tumors
- sebaceous carcinomas
- squamous cell carcinomas
- trichilemmal carcinomas
- skin adnexal carcinomas (NOS, not otherwise specified)
- majority of benign skin adnexal tumors
PDPN is over-expressed in testicular pre-invasive intratubular lesion, carcinoma in situ (CIS) compared to normal adult testis.
- Testicular germ-cell tumours of young adults are derived from a pre-invasive intratubular lesion, carcinoma in situ (CIS).
- Podoplanin (PDPN) has a function in developing testis, most likely at the level of cell-cell interactions among pre-meiotic germ cells and immature Sertoli cells.
Podoplanin is a highly sensitive and specific marker to distinguish primary skin adnexal carcinomas from adenocarcinomas metastatic to skin. (17255777)
Podoplanin lymphatic density and invasion correlate with adverse clinicopathologic and biological factors and survival in neuroblastomas. (22588067)
- M2A (D2-40) antigen is identical to gp36 (podoplanin, Aggrus, T1A-2).
Podoplanin lymphatic density and invasion correlate with adverse clinicopathologic and biological factors and survival in neuroblastomas. Ramani P, Somerville MS, May MT. Am J Surg Pathol. 2012 Jun;36(6):908-15. PMID: 22588067
Oakley GJ, Fuhrer K, Seethala RR. Brachyury, SOX-9, and podoplanin, new markers in the skull base chordoma vs chondrosarcoma differential: a tissue microarray-based comparative analysis. Mod Pathol. 2008 Sep 26. PMID: 18820665
Fujii T, Zen Y, Sato Y, Sasaki M, Enomae M, Minato H, Masuda S, Uehara T, Katsuyama T, Nakanuma Y. Podoplanin is a useful diagnostic marker for epithelioid hemangioendothelioma of the liver. Mod Pathol. 2008 Feb;21(2):125-30. PMID: 18084256
Podoplanin is a highly sensitive and specific marker to distinguish primary skin adnexal carcinomas from adenocarcinomas metastatic to skin. Liang H, Wu H, Giorgadze TA, Sariya D, Bellucci KS, Veerappan R, Liegl B, Acs G, Elenitsas R, Shukla S, Youngberg GA, Coogan PS, Pasha T, Zhang PJ, Xu X. Am J Surg Pathol. 2007 Feb;31(2):304-10. PMID: 17255777
Nakano T, Nakashima Y, Yonemitsu Y, Sumiyoshi S, Chen YX, Akishima Y, Ishii T, Iida M, Sueishi K. Angiogenesis and lymphangiogenesis and expression of lymphangiogenic factors in the atherosclerotic intima of human coronary arteries. Hum Pathol. 2005 Apr;36(4):330-40. PMID: 15891993
Schmid K, Birner P, Gravenhorst V, End A, Geleff S. Prognostic value of lymphatic and blood vessel invasion in neuroendocrine tumors of the lung. Am J Surg Pathol. 2005 Mar;29(3):324-8. PMID: 15725800