کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2152142 | 1090047 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
RAS Signaling in Colorectal Carcinomas through Alteration of RAS, RAF, NF1, and/or RASSF1A
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کلمات کلیدی
MSSMLPAMSIMSPDHPLCMAPK - MAPKMethylation-specific PCR - PCR اختصاصی متیلاتMicrosatellite instability - بی ثباتی ریزماهواره ایmicrosatellite stable - ریزماهواره پایدار استColorectal cancer - سرطان روده بزرگmitogen-activated protein kinase - پروتئین کیناز فعال با mitogenCRC - کد افزونگی دورهای Denaturing high-performance liquid chromatography - کروماتوگرافی مایع با کارایی بالا
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
تحقیقات سرطان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: RAS Signaling in Colorectal Carcinomas through Alteration of RAS, RAF, NF1, and/or RASSF1A RAS Signaling in Colorectal Carcinomas through Alteration of RAS, RAF, NF1, and/or RASSF1A](/preview/png/2152142.png)
چکیده انگلیسی
More than half of all colorectal carcinomas are known to exhibit an activated mitogen-activated protein kinase pathway. The NF1 gene, a negative regulator of KRAS, has not previously been examined in a series of colorectal cancer. In the present study, primary colorectal carcinomas stratified according to microsatellite instability status were analyzed. The whole coding region of NF1 was analyzed for mutations using denaturing high-performance liquid chromatography and sequencing, and the copy number alterations of NF1 were examined using multiple ligation-dependent probe amplification and real-time polymerase chain reaction. The mutational hot spots in KRAS and BRAF were sequenced, and promoter hypermethylation status of RASSF1A was assessed with a methylation-specific polymerase chain reaction. One sample had two missense mutations in NF1, whereas nine additional tumors had intronic mutations likely to affect exon splicing. Interestingly, 8 of these 10 tumors were microsatellite-unstable. Four other tumors showed a duplication of NF1. Mutations in KRAS and BRAF were mutually exclusive and were present at 40% and 22%, respectively. RASSF1A was hypermethylated in 31% of the samples. We show that the RAS signaling network is extensively dysregulated in colorectal carcinomas, because more than 70% of the tumors had an alteration in one or more of the four examined components.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neoplasia - Volume 10, Issue 7, July 2008, Pages 680-686, IN2-IN3
Journal: Neoplasia - Volume 10, Issue 7, July 2008, Pages 680-686, IN2-IN3
نویسندگان
Terje Ahlquist, Irene Bottillo, Stine A. Danielsen, Gunn I. Meling, Torleiv O. Rognum, Guro E. Lind, Bruno Dallapiccola, Ragnhild A. Lothe,