Expression of Hel‐N1 and HeL‐N2 in small‐cell lung carcinoma

Abstract
Hel-Nl and HuD are neuron-specific RNA-binding proteins that are antigenic targets of anti-Hu antibodies. Although expression of Hu antigens is most commonly seen in small-cell lung carcinoma, their exact identity (e.g., Hel-N1, HeLN2, HuD, and HuC) cannot be distinguished by immunological methods. Analysis of messenger RNA expression is needed for this distinctian. Here we demonstrate that Hel-Nl and Hel-N2 are expressed in small-cell lung carcinoma using reverse transcription-polymerase chain reaction.