Tozer, G.M. and Shaffi, K.M. (1995) The response of tumour vasculature to angiotensin II revealed by its systemic and local administration to 'tissue-isolated' tumours. British Journal of Cancer, 72 (3). pp. 595-600. ISSN 0007-0920
Abstract
A tissue-isolated preparation of the P22 rat carcinosarcoma was used to investigate the tumour vascular response to angiotensin II (ATII). In particular, the relative importance of systemic and local tumour factors was assessed by comparing tumour vascular resistance during systemic administration of ATII and during administration directly into the tumour-supplying artery. The effect of hypervolaemia on tumour vascular resistance was determined as well as the effect of ATII on oxygen metabolism. Tumour vascular resistance was increased by ATII in a dose-dependent manner. The response was biphasic with an initial peak in resistance followed by a lower plateau phase. Systemic administration of ATII was more effective in increasing tumour vascular resistance than direct administration. This suggests that systemic administration is not causing any reopening of previously collapsed tumour blood vessels. Further evidence for this is that hypervolaemia caused no reduction in tumour vascular resistance and that there was no difference in oxygen extraction by tumours between groups treated with systemically and directly administered ATII. A heterogeneous distribution of ATII receptors in the P22 tumour is a more likely explanation for the known heterogeneity of blood flow response to ATII.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © Cancer Research UK, 1995. Available under a Creative Commons Attribution Non-Commercial Share Alike License. |
Keywords: | P22 tumour; angiotensin II: vascular resistance; blood flow; oxygen metabolism |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > The Medical School (Sheffield) > Division of Genomic Medicine (Sheffield) > Department of Oncology and Metabolism (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 May 2017 14:41 |
Last Modified: | 11 May 2017 14:47 |
Published Version: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC20339... |
Status: | Published |
Publisher: | Cancer Research UK |
Refereed: | Yes |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115381 |