ScienceDaily: Biotechnology News |
- Tuberculosis bacterium's outer cell wall disarms the body's defense to remain infectious
- Engineers build smart petri dish: Device can be used for medical diagnostics, imaging cell growth continuously
- Factor in keeping 'good order' of genes discovered
- Modeling cancer using ecological principles
- Manipulated gatekeeper: How viruses find their way into the cell nucleus
- 2011 Nobel Prize in Physiology or Medicine: Breakthroughs in understanding how human Immune system is activated
- New insight into plant immune defenses
- Protein influences the 'use-by' date of cells, regulating the length of telomeres
| Tuberculosis bacterium's outer cell wall disarms the body's defense to remain infectious Posted: 03 Oct 2011 03:04 PM PDT The bacterium that causes tuberculosis has a unique molecule on its outer cell surface that blocks a key part of the body's defense. New research suggests this represents a novel mechanism in the microbe's evolving efforts to remain hidden from the human immune system. The TB bacterium has a molecule on its outer surface called lipomannan that can stop production of an important protein in the body's immune cells that helps contain TB infection and maintain it in a latent state.  |
| Posted: 03 Oct 2011 12:18 PM PDT The cameras in our cell phones have dramatically changed the way we share the special moments in our lives, making photographs instantly available to friends and family. Now, the imaging sensor chips that form the heart of these built-in cameras are helping engineers transform the way cell cultures are imaged by serving as the platform for a "smart" petri dish.  |
| Factor in keeping 'good order' of genes discovered Posted: 03 Oct 2011 06:44 AM PDT A factor that is crucial for the proper positioning of genes in the cell nucleus has now been discovered.  |
| Modeling cancer using ecological principles Posted: 03 Oct 2011 05:05 AM PDT The invasion of a new species into an established ecosystem can be directly compared to the steps involved in cancer metastasis. New research uses the Tilman model of competition between invasive species to study the metastasis of prostate cells into bone.  |
| Manipulated gatekeeper: How viruses find their way into the cell nucleus Posted: 03 Oct 2011 04:56 AM PDT Adenoviruses cause respiratory diseases and are more dangerous for humans than previously assumed. They manipulate gatekeeper molecules and infiltrate the cell nucleus with the aid of the host cell. Biologists and virologists have succeeded in demonstrating this mechanism in detail for the first time.  |
| Posted: 03 Oct 2011 04:43 AM PDT The Nobel Assembly at Karolinska Institutet has awarded the Nobel Prize in Physiology or Medicine 2011 to Bruce A. Beutler and Jules A. Hoffmann for their discoveries concerning the activation of innate immunity and the other half to Ralph M. Steinman for his discovery of the dendritic cell and its role in adaptive immunity.  |
| New insight into plant immune defenses Posted: 02 Oct 2011 04:00 PM PDT Researchers have identified an important cog in the molecular machinery of plant immunity -- a discovery that could help crop breeders produce disease-resistant varieties to help ensure future food security. There may also be implications for treating human immune-related disorders.  |
| Protein influences the 'use-by' date of cells, regulating the length of telomeres Posted: 30 Sep 2011 04:17 AM PDT Our cells' life span is determined by telomeres, genetic elements located at chromosome extremities. Telomeres erode after each cell division, which leads to cellular aging. Normally, the reaching of a critical shortening provokes an active process of programmed cell death. Tumor cells, however, evade this control system, whose functioning must thus be deciphered. Researchers in Switzerland have discovered a protein capable of regulating the length of telomeres and protecting them.  |
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