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Evaluation of Octreotide LAR in Prevention of Chemotherapy-induced Diarrhea

ABSTRACT: This study will evaluate the efficacy of Octreotide LAR in preventing chemotherapy-induced diarrhea (with regimens that contain 5 fluorouracil, irinotecan and capecitabine)in patients with colorectal cancer.

DISEASE(S): Diarrhea,Colorectal Cancer,Chemotherapy-induced Diarrhea

PROVIDER: 2048183 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Octreotide LAR and the oxyntic mucosa

Project description:Previous studies have shown that treatment with the somatostatin analogue octreotide LAR causes regression of gastric ECL-cell carcinoids in patients with hypergastrinaemia due to chronic atrophic gastritis, reducing both the number and size of tumours. The main objective of the present study was to examine the molecular mechanisms behind the antiproliferative effect of octreotide in the oxyntic mucosa on a genome wide scale. Female Sprague-Dawley rats were dosed with octreotide LAR and control group were given the LAR vehicle for 21 days. Serum gastrin levels were measured and tissue samples for histology and RNA extraction collected from the oxyntic mucosa. Histomorphological examination showed a significant decrease in the number of gastric glands, cells per gland and length of glands, indicating a negative effect of octreotide on growth of the oxyntic mucosa. Further immunohistochemical studies showed a tendency towards increased apoptosis and decreased proliferation in the group receiving octreotide. Affymetrix GeneChip microarrays were used to detect differentially expressed genes. Many regulated genes could be related to regulation of apoptosis, fewer to proliferation, and the largest group of regulated genes was transcriptional factors several of which may be involved in regulation of growth. Control studies using quantitative real-time RT-PCR showed a high degree of consistency of the microarray results. In conclusion, octreotide exerts a negative effect on growth of the oxyntic mucosa, and extensive gene expression changes relevant to growth regulation can be detected. Keywords: regulation, proliferation, Affymetrix GeneChip, qRT-PCR, immunohistochemistry.

2006-09-27 | GSE5910 | GEO

Transcription profiling of rat oxyntic mucoses after treatment with the Octreotide LAR

Project description:Previous studies have shown that treatment with the somatostatin analogue octreotide LAR causes regression of gastric ECL-cell carcinoids in patients with hypergastrinaemia due to chronic atrophic gastritis, reducing both the number and size of tumours. The main objective of the present study was to examine the molecular mechanisms behind the antiproliferative effect of octreotide in the oxyntic mucosa on a genome wide scale. Female Sprague-Dawley rats were dosed with octreotide LAR and control group were given the LAR vehicle for 21 days. Serum gastrin levels were measured and tissue samples for histology and RNA extraction collected from the oxyntic mucosa. Histomorphological examination showed a significant decrease in the number of gastric glands, cells per gland and length of glands, indicating a negative effect of octreotide on growth of the oxyntic mucosa. Further immunohistochemical studies showed a tendency towards increased apoptosis and decreased proliferation in the group receiving octreotide. Affymetrix GeneChip microarrays were used to detect differentially expressed genes. Many regulated genes could be related to regulation of apoptosis, fewer to proliferation, and the largest group of regulated genes was transcriptional factors several of which may be involved in regulation of growth. Control studies using quantitative real-time RT-PCR showed a high degree of consistency of the microarray results. In conclusion, octreotide exerts a negative effect on growth of the oxyntic mucosa, and extensive gene expression changes relevant to growth regulation can be detected. Experiment Overall Design: RNA from eigth animals (controls that received the LAR-vehicle) were pooled to produce a control affymetrix chip. Six animals (treatmentgroup) were given octreotide LAR and RNA from two and two animals were pooled to produce three affymetrix chips for comparison to the controlchip.

2008-06-14 | E-GEOD-5910 | biostudies-arrayexpress

Octreotide in Preventing Diarrhea in Patients Who Are Undergoing Radiation Therapy to the Pelvis

Project description:RATIONALE: Octreotide may be effective in preventing or controlling diarrhea in patients who are undergoing radiation therapy to the pelvis. It is not yet known whether octreotide is effective for diarrhea. PURPOSE: Randomized phase III trial to determine the effectiveness of octreotide in preventing diarrhea in patients who are undergoing radiation therapy to the pelvis.

| 2007366 | ecrin-mdr-crc

Octreotide in Preventing or Reducing Diarrhea in Patients Receiving Chemoradiotherapy for Anal or Rectal Cancer

Project description:RATIONALE: Octreotide may be effective in preventing or controlling diarrhea in patients who are undergoing chemoradiotherapy for anal or rectal cancer. It is not yet known whether octreotide is effective in treating diarrhea. PURPOSE: This randomized phase III trial is studying octreotide in preventing or reducing diarrhea in patients who are undergoing chemoradiotherapy for anal or rectal cancer.

| 2010315 | ecrin-mdr-crc

Octreotide in the Prevention of Diarrhea in Patients Receiving Irinotecan for Metastatic Colon Cancer

Project description:RATIONALE: Octreotide may be effective in preventing diarrhea that is caused by treatment with irinotecan. PURPOSE: Randomized phase III trial to study the effectiveness of octreotide in preventing diarrhea in patients who are receiving irinotecan for metastatic colon cancer.

| 2005313 | ecrin-mdr-crc

A Study Comparing Treatment With 177Lu-DOTA0-Tyr3-Octreotate to Octreotide LAR in Patients With Inoperable, Progressive, Somatostatin Receptor Positive Midgut Carcinoid Tumours

Project description:This was a multicenter, stratified, open, randomized, comparator-controlled, parallel-group phase III study comparing treatment with Lutathera plus best supportive care (30 mg Octreotide LAR) to treatment with high dose (60 mg) Octreotide LAR in participants with metastasized or locally advanced, inoperable, somatostatin receptor positive, histologically proven midgut carcinoid tumours with progression despite LAR treatment.

| 2123805 | ecrin-mdr-crc

lar-Transcriptomic analysis of the localized acquired resistance (LAR) phenomenon in Arabidopsis thaliana

Project description:tri38-lar - lar - Analyse the transcriptome of Arabidopsis thaliana plants developing localized acquired resistance (LAR) and a hypersensitive response (HR). The goal is to identify genes inducing LAR and/or HR. Plants were treated either with PstDC3000 (avrRpm1)or MgCl2 (control plants). The samples were studied at 3 points of the infection kinetics of the LAR phenomenon: 6h, 24h and 48h. Keywords: normal vs disease comparison

2008-12-01 | GSE13390 | GEO

Lanreotide and Octreotide Long Acting Release (LAR) for Patients With Advanced Gastroenteropancreatic Neuroendocrine Tumors (GEP-NETs)

Project description:An observational time and motion study in a clinical oncology setting is utilized in order to measure and compare product attributes and overall product efficiency between lanreotide and octreotide LAR.

| 2233976 | ecrin-mdr-crc

Octreotide Compared With Loperamide Hydrochloride for Chemotherapy-Related Diarrhea in Patients With Colorectal Cancer

Project description:RATIONALE: Drugs such as octreotide and loperamide hydrochloride use different ways to relieve the diarrhea caused by chemotherapy. PURPOSE: Randomized phase III trial to compare the effectiveness of octreotide with loperamide hydrochloride for the treatment of chemotherapy-related diarrhea in patients who have colorectal cancer.

| 2002643 | ecrin-mdr-crc

lar-Transcriptomic analysis of the localized acquired resistance (LAR) phenomenon in Arabidopsis thaliana

2010-05-15 | E-GEOD-13390 | biostudies-arrayexpress

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