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Usefulness of supernatant of pancreatic juice for genetic analysis of K-ras in diagnosis of pancreatic carcinoma.
Pancreas. 2001 Nov; 23(4):356-63.P

Abstract

AIMS

To ascertain whether analysis of K-ras mutations at codon 12 (KRM) in the supernatant of pure pancreatic juice (PPJ) is more useful for the diagnosis of pancreatic carcinoma (PCa) than that in sediment, the authors analyzed KRM in DNA extract from not only the sediment but also the supernatant of PPJ and compared the results.

METHODOLOGY

PPJ was collected endoscopically from 19 patients with PCa and 25 patients with chronic pancreatitis (CP). DNA was extracted from the supernatant and the sediment of PPJ. Mutant allele-specific amplification (MASA) was performed for KRM analysis with the DNA extracts from these samples.

RESULTS

The incidence of KRM in the supernatant of PPJ was 89% (17 of 19) in patients with PCa and 28% (7 of 25) in patients with CP, whereas that in the sediment was 79% (15 of 19) in patients with PCa and 20% (5 of 25) in patients with CP. Although there was no significant difference in KRM incidence between supernatant and sediment, the positive rate of KRM was higher in the former. Additionally, with regard to the PCa cases, KRM were found in the supernatant alone in four cases and in the sediment alone in two cases. Consequently, by a combination assay, all of the patients with PCa showed KRM in either the supernatant or sediment of PPJ. Although there was no relation between the incidence of KRM in PPJ and the location and size of tumor, and clinical stage of carcinoma in the patients with PCa, two patients with clinical stage I disease showed KRM in the supernatant.

CONCLUSION

These results suggest that the positive rate of KRM in the supernatant is not lower than that in the sediment, and simultaneous analysis of KRM in the supernatant and sediment of PPJ enhances the genetic diagnosis of PCa.

Authors+Show Affiliations

Department of Internal Medicine and Medical Oncology, Cancer Research Institute, Kanazawa University, 4-86, Yoneizumi, Kanazawa 921-8044, Japan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11668203

Citation

Ha, A, et al. "Usefulness of Supernatant of Pancreatic Juice for Genetic Analysis of K-ras in Diagnosis of Pancreatic Carcinoma." Pancreas, vol. 23, no. 4, 2001, pp. 356-63.
Ha A, Watanabe H, Yamaguchi Y, et al. Usefulness of supernatant of pancreatic juice for genetic analysis of K-ras in diagnosis of pancreatic carcinoma. Pancreas. 2001;23(4):356-63.
Ha, A., Watanabe, H., Yamaguchi, Y., Ohtsubo, K., Wang, Y., Motoo, Y., Okai, T., Wakabayahi, T., & Sawabu, N. (2001). Usefulness of supernatant of pancreatic juice for genetic analysis of K-ras in diagnosis of pancreatic carcinoma. Pancreas, 23(4), 356-63.
Ha A, et al. Usefulness of Supernatant of Pancreatic Juice for Genetic Analysis of K-ras in Diagnosis of Pancreatic Carcinoma. Pancreas. 2001;23(4):356-63. PubMed PMID: 11668203.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Usefulness of supernatant of pancreatic juice for genetic analysis of K-ras in diagnosis of pancreatic carcinoma. AU - Ha,A, AU - Watanabe,H, AU - Yamaguchi,Y, AU - Ohtsubo,K, AU - Wang,Y, AU - Motoo,Y, AU - Okai,T, AU - Wakabayahi,T, AU - Sawabu,N, PY - 2001/10/23/pubmed PY - 2002/1/5/medline PY - 2001/10/23/entrez SP - 356 EP - 63 JF - Pancreas JO - Pancreas VL - 23 IS - 4 N2 - AIMS: To ascertain whether analysis of K-ras mutations at codon 12 (KRM) in the supernatant of pure pancreatic juice (PPJ) is more useful for the diagnosis of pancreatic carcinoma (PCa) than that in sediment, the authors analyzed KRM in DNA extract from not only the sediment but also the supernatant of PPJ and compared the results. METHODOLOGY: PPJ was collected endoscopically from 19 patients with PCa and 25 patients with chronic pancreatitis (CP). DNA was extracted from the supernatant and the sediment of PPJ. Mutant allele-specific amplification (MASA) was performed for KRM analysis with the DNA extracts from these samples. RESULTS: The incidence of KRM in the supernatant of PPJ was 89% (17 of 19) in patients with PCa and 28% (7 of 25) in patients with CP, whereas that in the sediment was 79% (15 of 19) in patients with PCa and 20% (5 of 25) in patients with CP. Although there was no significant difference in KRM incidence between supernatant and sediment, the positive rate of KRM was higher in the former. Additionally, with regard to the PCa cases, KRM were found in the supernatant alone in four cases and in the sediment alone in two cases. Consequently, by a combination assay, all of the patients with PCa showed KRM in either the supernatant or sediment of PPJ. Although there was no relation between the incidence of KRM in PPJ and the location and size of tumor, and clinical stage of carcinoma in the patients with PCa, two patients with clinical stage I disease showed KRM in the supernatant. CONCLUSION: These results suggest that the positive rate of KRM in the supernatant is not lower than that in the sediment, and simultaneous analysis of KRM in the supernatant and sediment of PPJ enhances the genetic diagnosis of PCa. SN - 0885-3177 UR - https://www.unboundmedicine.com/medline/citation/11668203/Usefulness_of_supernatant_of_pancreatic_juice_for_genetic_analysis_of_K_ras_in_diagnosis_of_pancreatic_carcinoma_ L2 - http://dx.doi.org/10.1097/00006676-200111000-00004 DB - PRIME DP - Unbound Medicine ER -