RGD Reference Report - KAI1, CAR, and Smad4 expression in the progression of colorectal tumor. - Rat Genome Database

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KAI1, CAR, and Smad4 expression in the progression of colorectal tumor.

Authors: Mikami, T  Ookawa, K  Shimoyama, T  Fukuda, S  Saito, H  Munakata, A 
Citation: Mikami T, etal., J Gastroenterol. 2001 Jul;36(7):465-9. doi: 10.1007/s005350170069.
RGD ID: 21066339
Pubmed: PMID:11480790   (View Abstract at PubMed)
DOI: DOI:10.1007/s005350170069   (Journal Full-text)


PURPOSE: The abnormal expression of several genes is involved in the development of colorectal tumors. The aim of this study was to examine the expression of KAI1, CAR, and Smad4, which has been associated with the progression of other cancers.
METHODS: We examined 12 adenomas, 38 primary carcinomas, 10 liver metastases, and 7 adenocarcinoma cell lines, by fluorescent multiplex reverse transcription-polymerase chain reaction (RT-PCR).
RESULTS: KAI1 expression was higher in adenomas (2.55 +/- 0.61; P < 0.05) and primary carcinomas (3.30 +/- 0.42; P < 0.005) than in normal mucosa, but it was not correlated with tumor stage. CAR expression was lower in Dukes' B (1.28 +/- 0.53) than in Dukes' A (2.38 +/- 0.48) (P < 0.05), but increased with tumor progression; Dukes' C (1.45 +/- 0.25), Dukes' D (1.53 +/- 0.14), and metastases (2.09 +/- 0.39) (P < 0.05). Smad4 expression increased in adenomas (2.30 +/- 0.46; P < 0.05), but decreased with tumor progression; Dukes' A (2.14 +/- 0.37), Dukes' B (1.65 +/- 0.41), Dukes' C (1.57 +/- 0.25), Dukes' D (1.08 +/- 0.18), and metastases (0.82 +/- 0.21) (P < 0.05).
CONCLUSIONS: These results suggest that the upregulation of CAR and down-regulation of Smad4 are associated with the progression of colorectal tumors, while the upregulation of these genes and of KAI1 seems to be involved in the early stage.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
colorectal adenoma  IEP 21066339mRNA:increased expression:mucosaRGD 
colorectal adenoma  ISOSMAD4 (Homo sapiens)21066339; 21066339mRNA:increased expression:mucosaRGD 

Objects Annotated

Genes (Rattus norvegicus)
Smad4  (SMAD family member 4)

Genes (Mus musculus)
Smad4  (SMAD family member 4)

Genes (Homo sapiens)
SMAD4  (SMAD family member 4)


Additional Information