Telomeric Abnormalities in Colorectal Diseases by Fluorescent in Situ Hybridization Technique
Telomeric Abnormalities in Benign and Malignant Colorectal Diseases by Fluorescent in Situ Hybridization Technique
Colorectal carcinoma is a heterogeneous disease that is caused by the interaction of genetic and environmental factors. colorectal carcinoma encompasses a complex disease with different molecular pathways and biological characteristics arising from a multi-step process that implicates several genetic and epigenetic events . The multi-step genetic model involves the loss of function of tumor suppressor genes, such as adenomatous polyposis coli (APC), Telomeres could be a promising marker due to the fact that their lengths change in the colorectal polyp-carcinoma sequence . Moreover, telomere length (TL) is altered in blood cells in patients with colorectal carcinoma
- These findings could suggest that changes in TL may take place before the development of the tumor .
The two main forms of inflammatory bowel disease (IBD), ulcerative colitis (UC) and Crohn's disease (CD) are characterized by chronic intestinal inflammation and risk of progression to colon cancer. One proposed cause of the latter characteristic is chromosome instability, since the rearrangement of genetic material can lead to activation of oncogenes, loss of tumor suppressor genes and other changes that lead to uncontrolled cell growth. Chromosome instability is particularly associated with UC and has been observed in colon epithelial cells and peripheral blood mononuclear cell. Since genomic instability in peripheral blood mononuclear cells (PBMCs) has been used as a biomarker for global cancer risk in a number of diseases, the latter observation suggests the possibility of a chromosome instability syndrome in UC that could affect all tissues. One possible cause of chromosome instability is telomere dysfunction .
調査の概要
詳細な説明
Human chromosomes are capped and stabilized by telomeres, which not only protect them from damage but also have a role in regulating cellular senescence. After reaching a critical length, telomeres experience a double DNA change and cells will eventually enter senescence (replication) or cell death . Telomere length and telomere shortening have been long hypothesized to be a biological marker of aging at the cellular level and a potential mechanism of carcinogenesis. Genomic instability is a critical factor in the initiation and progression of human cancers. One mechanism that underlies genomic instability is loss of telomere function .
fluorescent in situ hybridization is a molecular diagnostic technique that utilizes labeled DNA probes to detect or confirm gene or chromosome abnormalities. fluorescent in situ hybridization is often utilized for both research and diagnosis of hematological malignancies and solid tumors. Conceptually, fluorescent in situ hybridization is a very straightforward technique whereby a DNA probe is hybridized to its complementary sequence on chromosomal preparations previously fixed on microscope slides . fluorescent in situ hybridization is able to detect cells that have chromosomal abnormalities consistent with neoplasia .
There has been a surge of published studies which assessed the association between telomere length and development of colorectal carcinoma. Thus, a meta-analysis addressing colorectal carcinoma and telomere length would be a useful addition to the current information in this area.
研究の種類
入学 (予想される)
連絡先と場所
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- Adult age group ˃ 18 years.
- Newly diagnosed cases (no previous treatment).
- No treatment was taken for HCV infection.
Exclusion Criteria:
- age group < 18 years.
- Patients with malignancy of other type.
- Patients not diagnosed by endoscopy or biopsy (not surely diagnosed).
研究計画
研究はどのように設計されていますか?
デザインの詳細
コホートと介入
グループ/コホート |
介入・治療 |
---|---|
control group
taking blood samples from apparently healthy people
|
taking blood samples and measure telomeric abnormalities
|
benign colorectal
taking blood samples from patients
|
taking blood samples and measure telomeric abnormalities
|
malignant colorectal
taking blood samples from patients
|
taking blood samples and measure telomeric abnormalities
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
---|---|---|
presence of telomeric abnormalities
時間枠:one year
|
measure percentage of telomeric abnormalities in benign and malignant colorectal diseases
|
one year
|
協力者と研究者
スポンサー
捜査官
- 主任研究者:fatma magdy zidan, residant、South Egypt Cancer Institute
出版物と役立つリンク
研究記録日
主要日程の研究
研究開始 (予想される)
一次修了 (予想される)
研究の完了 (予想される)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
taking blood samplesの臨床試験
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University of UtahAlbert Einstein College of Medicine; University of California, San Francisco; National Human Genome... と他の協力者完了新生児スクリーニング
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Ischemia Care LLC完了虚血性脳卒中 | 心房細動 | 血栓性脳卒中 | 一過性脳虚血発作 | 心塞栓性脳卒中 | 脳底動脈の脳卒中 | 一過性脳血管イベントアメリカ
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Applied Science & Performance Institute完了
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Bedford Hospital NHS TrustAnglia Ruskin Universityわからない