Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA522932 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR8668320_1.fastq.gz | Fastqsanger.gz | |||
| SRR8668320_2.fastq.gz | Fastqsanger.gz | |||
| SRR8668330_1.fastq.gz | Fastqsanger.gz | |||
| SRR8668330_2.fastq.gz | Fastqsanger.gz | |||
| SRR8668340_1.fastq.gz | Fastqsanger.gz |
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Project description:Fresh Atypical ductal hyperplasia (ADH) tissue collected from breast of a women who either (1) had no prior history of breast cancer and had not developed breast cancer in five years after diagnosis, (2) had cancer before ADH, or had cancer at the time as ADH or developed cancer after ADH diagnosis
2007-08-25 | E-GEOD-2429 | biostudies-arrayexpress
Project description:Pathologic and epidemiologic evidence has led to a histologic model of breast cancer progression that involves advancement through specific morphologic stages including atypical ductal hyperplasia (ADH), ductal carcinoma in situ (DCIS) and invasive mammary carcinoma (IMC), although not necessarily always in a linear fashion. Numerous observational studies have examined genetic, epigenetic and gene expression differences in breast tissues representing these different stages of progression, but model systems which would allow for experimental testing of specific factors influencing transition through these stages are scarce. The 21T series cell lines, all originally derived from the same patient with metastatic breast cancer, have been proposed to represent a mammary tumor progression series. We report here that three of the 21T cell lines indeed mimic specific stages of human breast cancer progression (21PT-derived cells, ADH; 21NT-derived cells, DCIS; 21MT-1 cells, IMC) when grown in the mammary fat pad of nude mice, albeit after up to a year post-injection. In order to develop a more rapid, readily manipulatable in vitro assay for examining the biologic differences between these cell lines, we have made use of a 3D Matrigel system. When grown in 3D Matrigel, we have found characteristic morphologies of the three cell lines in which quantifiable aspects of the stage-specific in vivo behaviors (i.e. differences in acinar structure formation, cell polarization, cell cohesiveness, cell proliferation, cell invasion) are re-capitulated in a reproducible fashion. Gene expression profiling has revealed a characteristic pattern for each of the three cell lines. Interestingly, WNT pathway alterations are particularly predominant in the early transition from 21PTci (ADH) to 21NTci (DCIS), whereas alterations in expression of genes associated with control of cell motility and invasiveness phenomena are more prominent in the later transition of 21NTci (DCIS) to 21MT-1 (IMC). This system thus reveals potential therapeutic targets and will provide a means of testing the influences of identified genes on transitions between these stages of pre-malignant to malignant growth. Keywords: DCIS or IDC vs ADH RNA derived from three biological replicates of a cell line representing atypical ductal hyperplasia (ADH), Ductal carcinoma in situ (DCIS), and Invasive ductal carcinoma (IDC)
2010-04-06 | E-GEOD-18370 | biostudies-arrayexpress
Project description:To gain insights into the mechanisms involved in breast cancer progression we conducted a microRNA global expression analysis on a 21T series of cell lines obtained from the same patient during different stages of breast cancer progression. These stages are represented by cell lines derived from normal epithelial (16N), atypical ductal hyperplasia (21PT), primary in situ ductal carcinoma (21NT) and pleural effusion of a lung metastasis (21MT-1 and 21MT-2). In a global microRNA expression analysis, miR-205 was the only miRNA to display an important downregulation in the metastatic cell lines (21MT-1; 21MT-2) when compared to the non-invasive cells (21PT and 21NT). The lower amounts of miR-205 found also correlated with high histological grades biopsies and with higher invasion rates in a Boyden chamber assay. This work pinpoints miR-205 as a potential player in breast tumor invasiveness. These experiments are conducted as 2 replicates.
2017-05-03 | E-MTAB-5239 | biostudies-arrayexpress
Project description:Fresh Atypical ductal hyperplasia (ADH) tissue collected from breast of a women who either (1) had no prior history of breast cancer and had not developed breast cancer in five years after diagnosis, (2) had cancer before ADH, or had cancer at the time as ADH or developed cancer after ADH diagnosis Keywords: other
2005-04-06 | GSE2429 | GEO
Project description:Proliferative breast lesions, such as simple ductal hyperplasia (SH) and atypical ductal hyperplasia (ADH), are candidate precursors to ductal carcinoma in situ (DCIS) and invasive cancer. To better understand their relationship to more advanced disease, we used microdissection and DNA microarrays to profile the gene expression of patient-matched histologically normal (HN), ADH, and DCIS from 12 patients with ER+ sporadic breast cancer. SH were profiled from a subset of cases. We found 837 differentially expressed genes between DCIS-HN and 447 between ADH-HN, with >90% of the ADH-HN genes also present among the DCIS-HN genes. Only 61 genes were identified between ADH-DCIS. Expression differences were reproduced in an independent cohort of patient-matched lesions by qRT-PCR. Many breast cancer-related genes and pathways were dysregulated in ADH and maintained in DCIS. Particularly, cell adhesion and extracellular matrix (ECM) interactions were overrepresented. Focal adhesion was the top pathway in each gene set. We conclude that ADH and DCIS share highly similar gene expression and are distinct from HN. In contrast, SH appear more similar to HN. These data provide genetic evidence that ADH (but not SH) are often precursors to cancer and suggest cancer-related genetic changes, particularly adhesion and ECM pathways, are dysregulated prior to invasion and even before malignancy is apparent. These findings could lead to novel risk stratification, prevention, and treatment approaches. Patient-matched (HN, SH, ADH, DCIS) samples were isolated from within patients with ER+ sporadic breast cancers via laser capture microdissection. Use of patient-matched samples decreases between patient variations. Forty total samples were analyzed via Affymetrix U133A. Patient age ranged from 48-92. Case numbers correspond to individual patients. Each sample is identified by case number, histologic lesion and corresponding microarray ID.
2009-09-08 | E-GEOD-16873 | biostudies-arrayexpress
Project description:RATIONALE: The use of intrauterine levonorgestrel may prevent atypical endometrial hyperplasia and endometrial cancer in women with hereditary non-polyposis colorectal cancer or Lynch syndrome. It is not yet known whether intrauterine levonorgestrel and observation are more effective than observation alone in preventing atypical endometrial hyperplasia and endometrial cancer in women with hereditary non-polyposis colorectal cancer or Lynch syndrome.
PURPOSE: This randomized phase III trial is studying intrauterine levonorgestrel and observation to see how well they work compared with observation alone in preventing atypical endometrial hyperplasia and endometrial cancer in women with hereditary non-polyposis colorectal cancer or Lynch syndrome.
| 2047003 | ecrin-mdr-crc
Project description:Ductal carcinoma in situ (DCIS) is a nonobligate precursor of invasive breast cancer. Its biological features, particularly its intratumoral heterogeneity, remain obscure. Moreover, mechanism of lymph node metastasis is unclear. To address this deficiency, we performed single-cell transcriptome profiling of DCIS, invasive ductal carcinoma (IDC) and lymph node metastasis. Single-cell transcriptome analysis revealed that breast cancer exhibits intratumoral heterogeneity at the transcriptional level, defining specific functions, and that DCIS has similar heterogeneity to IDC.
2022-08-02 | GSE195861 | GEO