[Expression of KAI1 gene in human laryngeal carcinoma and its clinical significance].
OBJECTIVE
To explore the mRNA expression of KAI1 gene in laryngeal squamous-cell carcinoma and its clinical significance.


METHODS
Fresh laryngeal cancer samples taken from 40 laryngeal carcinoma cases and normal control laryngeal tissues from 9 subjects were examined with semi-quantitative reverse transcription polymerase chain reaction (RT-PCR).


RESULTS
Moderate, low and negative expression rates of KAI1 gene mRNA in nine normal laryngeal tissues were 33.3% (3/9), 33.3% (3/9) and 33.3% (3/9), respectively. The high, moderate, low and negative expression rates of KAI1 mRNA in 25 laryngeal cancers without lymph node metastasis were 40.0% (10/25), 28.0% (7/25), 20.0% (5/25) and 12.0% (3/25), respectively. The moderate, low and negative expression rates of KAI1 mRNA in 15 laryngeal cancers with lymph node metastasis were 20.0% (3/15), 26.7% (4/15) and 53.3% (8/15), respectively. The KAI1 mRNA expression in the laryngeal cancers without lymph node metastasis was higher than that in normal laryngeal tissues (P < 0.05). The KAI1 mRNA expression in the laryngeal cancers with lymph node metastasis was lower than that in the laryngeal cancers without lymph node metastasis (P < 0.05). The high, moderate and low expression rates of KAI1 mRNA in 10 highly differentiated laryngeal cancers were 50.0% (5/10), 30.0% (3/10) and 20.0% (2/10), respectively. The high, moderate, low and negative expression rates of KAI1 mRNA in 12 low differentiation laryngeal cancers were 8.3% (1/12), 16.7% (2/12), 16.7% (2/12) and 58.3% (7/12), respectively. The differences of KAI1 mRNA expression between high and low differentiation laryngeal cancers were statistically significant (P < 0.05).


CONCLUSIONS
The decrease of KAI1 mRNA expression may be related to lymph node metastasis and low differentiation of laryngeal squamous-cell carcinoma.
Bai
Wei-liang
WL
Department of Otorhinolaryngology, The Second Clinical Hospital, China Medical University, Shenyang 110004, China. bweiliang@yahoo.com.cn
Ren
Zhong
Z
Pan
Zi-min
ZM
Gao
Hong
H
D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D051861:Kangai-1 Protein / Q000096:biosynthesis* / Q000235:genetics; D007822:Laryngeal Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
D051861:Kangai-1 Protein; D012333:RNA, Messenger