SGLT gene expression in primary lung cancers and their metastatic lesions

Jpn J Cancer Res. 2001 Aug;92(8):874-9. doi: 10.1111/j.1349-7006.2001.tb01175.x.


Cancer cells show increased glucose uptake and utilization in comparison with their normal counterparts. Glucose transporters play an important role in glucose uptake. We previously reported the differential gene expression of the GLUT family in primary and metastatic lesions of lung cancer. To investigate the role of Na( +) / glucose cotransporter (SGLT) genes in cancers, we examined the levels of expression of SGLT1 and SGLT2 genes in primary lung cancers and their metastatic lesions. Ninety-six autopsy samples (35 primary lung cancers, 35 corresponding normal lung tissues, 10 metastatic liver lesions, and 16 metastatic lymph nodes) from 35 patients were analyzed for SGLT1 and SGLT2 expression by reverse transcription (RT)-polymerase chain reaction (PCR). There were no significant differences in the level of expression of either gene between the primary lung cancers and normal lung tissues. The level of SGLT1 expression in the metastatic lesions and primary lung cancers did not differ significantly. The level of SGLT2 expression was, however, significantly higher in the metastatic lesions of both the liver and lymph node than in the primary lung cancers. These results suggest that SGLT2 plays a role in glucose uptake in the metastatic lesions of lung cancer.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Carcinoma, Non-Small-Cell Lung / metabolism*
  • Carcinoma, Non-Small-Cell Lung / secondary
  • Carcinoma, Small Cell / metabolism*
  • Carcinoma, Small Cell / secondary
  • Female
  • Gene Expression
  • Humans
  • Liver Neoplasms / metabolism*
  • Liver Neoplasms / secondary
  • Lung Neoplasms / metabolism*
  • Lung Neoplasms / pathology
  • Lymphatic Metastasis
  • Male
  • Membrane Glycoproteins / genetics*
  • Membrane Glycoproteins / metabolism
  • Middle Aged
  • Monosaccharide Transport Proteins / genetics*
  • Monosaccharide Transport Proteins / metabolism
  • RNA, Messenger / metabolism
  • RNA, Neoplasm / metabolism
  • Reverse Transcriptase Polymerase Chain Reaction
  • Sodium-Glucose Transporter 1
  • Sodium-Glucose Transporter 2


  • Membrane Glycoproteins
  • Monosaccharide Transport Proteins
  • RNA, Messenger
  • RNA, Neoplasm
  • SLC5A1 protein, human
  • SLC5A2 protein, human
  • Sodium-Glucose Transporter 1
  • Sodium-Glucose Transporter 2