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(American Journal of Pathology. 2002;160:1561-1565.)
© 2002 American Society for Investigative Pathology

Short Communication

Expression of Histidine Decarboxylase and Synthesis of Histamine by Human Small Cell Lung Carcinoma

Lothar Graff*, Mónica Frungieri*, Robert Zanner{dagger}, Agnes Pohlinger{dagger}, Christian Prinz{dagger} and Manfred Gratzl*

From the Anatomisches Institut,*Universität München, München; and the II. Medizinische Klinik und Poliklinik,{dagger}Technische Universität München, München, Germany

We recently found that human small cell lung carcinomas (SCLCs) express, in addition to other neuroendocrine markers, vesicular monoamine transporters. Our present results indicate that SCLCs are histaminergic. We detected the biosynthetic enzyme histidine decarboxylase by immunohistochemistry in paraffin sections of 12 biopsies of SCLC tumors. This finding was supported by immunoblotting and reverse transcription-polymerase chain reaction experiments using established SCLC cell lines, frozen and paraffin-embedded SCLC tumors. Moreover, we found histamine to be synthesized, stored, and released by cultured SCLC cells. Our novel observations may be useful for developing new diagnostic tools for this frequent and highly malignant tumor.




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Copyright © 2002 by the American Society for Investigative Pathology.