Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Probing Proteins Can Lead to Better Understanding of Anti-Tumor Agents

30.01.2007
There are a number of naturally occurring chemicals that are used in phototherapy of skin diseases. Hypocrellin A (HA), which can be extracted from a parasitic fungus, has been taken orally as a folk medicine for several centuries in China.

Recent studies have shown that this natural compound also displays anti-tumor and antiviral activities against several types of viruses, including human immunodeficiency virus (HIV). It is easily prepared and purified and has been intensively investigated by a broad spectrum of researchers over the past decade.

HA can photosensitize membrane proteins and lipids, damaging the membranes of tumor cells, which might cause them to die. In order to reveal the detailed photosensitive damage mechanism of HA at molecular level, researchers used a model protein with known structure, lysozyme. According to Jiahong Zhou, writing in the current issue of Spectroscopy: An International Journal, this mechanism has not been previously investigated.

Raman spectroscopy can probe the structure of biomolecules and can identify structural changes in proteins. The authors conclude that the active oxygen species released by HA induce dramatic changes in the structure of the lysozyme molecule. With more study of this mechanism, perhaps HA can serve as a therapeutic agent for a number of diseases.

... more about:
»lysozyme »mechanism »structure

The article is “Raman spectroscopic study of photosensitive damage to lysozyme structure sensitized by hypocrellin A” by J.H. Zhou, X.H. Wu, S.H. Wei, X.T. Gu, Y.Y. Feng, X.S. Wang and B.W. Zhang. The authors are from the Analysis & Testing Center, Nanjing Normal University, 210097 Nanjing, P.R. China, and the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 10010, P.R. China. It appears in Spectroscopy: An International Journal, Volume 20, Issue 5/6 (2007), published by IOS Press.

Astrid Engelen | alfa
Further information:
http://www.iospress.nl

Further reports about: lysozyme mechanism structure

More articles from Life Sciences:

nachricht How brains surrender to sleep
23.06.2017 | IMP - Forschungsinstitut für Molekulare Pathologie GmbH

nachricht A new technique isolates neuronal activity during memory consolidation
22.06.2017 | Spanish National Research Council (CSIC)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>