Navigation Links
Tumor blood vessels prevent the spread of cancer cells

A lack of the protein endoglin in the blood vessels of tumour-bearing mice enables the spread of daughter tumours, according to researchers at Karolinska Institutet and Lund University in Sweden in a study published in the scientific periodical The Journal of Experimental Medicine. Given that the tumour vasculature constitutes an important barrier to the spread of cancer cells, the team suggests that drugs should be developed to strengthen the blood vessels' protective function.

Studies of the process of metastasis (the spread of daughter tumours) have mainly focused on how the properties of the cancer cells themselves promote their spread. For the present study, however, the researchers studied the function of a specific signal pathway consisting of the protein endoglin in the vasculature of tumour-bearing mice. They discovered that when the gene that codes for endoglin was missing in the blood vessels in tumours in the breast, lung or pancreas, it led to increased metastatic spread to other organs.

"The study shows that the blood vessels play an important role in preventing the spread of tumour cells through the blood stream," says Kristian Pietras, professor at Lund University and also affiliated to Karolinska Institutet. "This is because blood vessels lacking in endoglin change in a way that makes it easier for the cancer cells to enter the blood stream and spread to other organs. So with this in mind, we suggest that drugs should be developed to strengthen the barrier function of the blood vessels to prevent the spread of cancer."

The results of the study are also of significance to patients with the rare congenital syndrome Hereditary Hemorrhagic Telangiectasia (HHT), which in some patients is caused by the lack of onecopy of the endoglin gene. HHT causes deformities of the blood capillaries and increases the risk of haemorrhage. The researchers believe that HHT patients afflicted by cancer should be monitored particularly closely since their vascular barrier against metastatic spread might be defective.

"At the same time, we also show that tumours that have developed in mice lacking the endoglin gene are considerably more sensitive to treatment with a certain kind of antiangiogenic drugs that target the growth factor VEGF," says Professor Pietras. "HHT patients with cancer may therefore benefit greatly from the VEGF blockers currently in clinical use."

"Going by the results of our study, we also suggest, paradoxically, that a combination of drugs that block endoglin and VEGF should be tried as an effective cancer therapy; a solution thatis already being tested in clinical studies in the USA," he adds.


Contact: Karolinska Institutet Press Office
Karolinska Institutet

Related biology news :

1. The loss of a protein makes jump the tumor to the lymph node
2. Nanotherapy: Treating deadly brain tumors by delivering big radiation with tiny tools
3. Dental X-rays linked to common brain tumor
4. TGen leads new National Institutes of Health study of brain tumors
5. Immune-response genes affecting breast tumor eradication
6. A single stem cell mutation triggers fibroid tumors
7. Clusters of cooperating tumor-suppressor genes are found in large regions deleted in common cancers
8. Cancerous tumors deliver pro-metastatic information in secreted vesicles
9. Researchers identify need to sample multiple tumor zones in breast cancer
10. Tumor microenvironment helps skin cancer cells resist drug treatment
11. BGI debuts new tool PDXomics for tumor xenograft research and applications
Post Your Comments:
(Date:10/26/2015)... India , October 26, 2015 ... --> adds ... 2015 to 2021 as well as ... 2015-2019 research reports to its collection ... . --> ...
(Date:10/23/2015)... Research and Markets ( ) has ... Biometrics Market 2015-2019" report to their offering. ... global voice recognition biometrics market to grow at a ... --> --> The report, Global Voice ... an in-depth market analysis with inputs from industry experts. ...
(Date:10/22/2015)... (NASDAQ: SYNA ), a leading developer of human interface solutions, ... 2015. --> --> Net ... over the comparable quarter last year to $470.0 million. Net income ... $0.62 per diluted share. --> ... 2016 grew 39 percent over the prior year period to $56.9 ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... -- Studies reveal the differences in species ... the way for more effective treatment for one of the ... --> --> Gum disease ... cats, yet relatively little was understood about the bacteria associated ... conducted by researchers from the WALTHAM Centre for Pet Nutrition ...
(Date:11/25/2015)... , ... November 25, 2015 , ... ... the Organization of Black Aerospace Professionals (OPBAP) has been formalized with the signing ... AMA team leaders met with OPBAP leaders Capt. Karl Minter and Capt. Albert ...
(Date:11/24/2015)... , Nov. 24, 2015  Asia-Pacific (APAC) ... research organisation (CRO) market. The trend of outsourcing ... lower margins but higher volume share for the ... and scale, however, margins in the CRO industry ... (CRO) Market ( ), finds that ...
(Date:11/24/2015)... VANCOUVER , Nov. 24, 2015 /CNW/ - iCo ... ICOTF), today reported financial results for the quarter ... are expressed in Canadian dollars and presented under ... the United States ," said Andrew ... "These advancements regarding iCo-008 are not only value ...
Breaking Biology Technology: