News tagged with immune system
More than half of patients diagnosed with Non-Hodgkin Lymphoma (NHL) are now surviving the disease thanks to improved diagnosis and treatment, according to a new report1 from Cancer Research UK.
Cancer 10 hours ago | 5 / 5 (1) | 0
(Medical Xpress)—A research team, led by Jeremy Barr, a biology post-doctoral fellow, unveils a new immune system that protects humans and animals from infection.
Immunology May 20, 2013 | 4.8 / 5 (25) | 8 |
Salamanders' immune systems are key to their remarkable ability to regrow limbs, and could also underpin their ability to regenerate spinal cords, brain tissue and even parts of their hearts, scientists have ...
Medical research May 20, 2013 | 4.9 / 5 (7) | 4 |
The human gut is loaded with commensal bacteria – "good" microbes that, among other functions, help the body digest food. The gastrointestinal tract contains literally trillions of such cells, and yet the ...
Medical research May 22, 2013 | 5 / 5 (3) | 0 |
Top AIDS scientists were optimistic Wednesday of finding a cure for the disease that has claimed 30 million lives—but said it might not work for all people.
HIV & AIDS May 22, 2013 | not rated yet | 0
Using the Department of Defense Serum Repository (DoDSR), University of Cincinnati (UC) researchers have identified a number of biomarkers for inflammatory bowel disease (IBD), which could help with earlier diagnosis and ...
Diseases, Conditions, Syndromes May 21, 2013 | 5 / 5 (1) | 0
Bacteria resistant to the antibiotic colistin are also commonly resistant to antimicrobial substances made by the human body, according to a study in mBio, the online open-access journal of the American Society for Microb ...
Diseases, Conditions, Syndromes May 21, 2013 | 4.5 / 5 (2) | 0
(Medical Xpress)—The feared Legionella pneumophila is responsible for legionellosis, an infectious disease that can lead to pneumonia. To infect humans, this pathogen has developed a complex method that allows it to camouflage ...
Diseases, Conditions, Syndromes May 20, 2013 | not rated yet | 0
Raising hopes for cell-based therapies, UC San Francisco researchers have created the first functioning human thymus tissue from embryonic stem cells in the laboratory. The researchers showed that, in mice, ...
Immunology May 16, 2013 | 4.8 / 5 (5) | 0 |
(Medical Xpress)—The endothelium, the cellular layer lining the body's blood vessels, is extremely resilient. Measuring just a few hundred nanometers in thickness, this super-tenuous structure routinely ...
Medical research May 16, 2013 | 4 / 5 (2) | 1 |
(HealthDay)—An experimental drug that taps the power of the body's immune system to fight cancer is shrinking tumors in patients for whom other treatments have failed, an early study shows.
Cancer May 16, 2013 | 5 / 5 (3) | 0 |
Peptide molecules derived from the body's natural immune system can help boost the body's defence against life-threatening blood poisoning, joint University research has uncovered.
Medical research May 17, 2013 | 4 / 5 (1) | 0 |
In the summer of 1968, a new strain of influenza appeared in Hong Kong. This strain, known as H3N2, spread around the globe and eventually killed an estimated 1 million people.
Diseases, Conditions, Syndromes May 10, 2013 | not rated yet | 0 |
(HealthDay)—A new Swedish study suggests that parents who want to protect their infants from developing allergies should try a simple approach to introducing their children to the wide world of microbes: ...
Immunology May 06, 2013 | 4.7 / 5 (13) | 2 |
(Medical Xpress)—UCLA researchers at the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research have used induced pluripotent stem cells (iPSC) to advance disease-in-a-dish modeling of a rare genetic ...
Diseases, Conditions, Syndromes May 10, 2013 | 5 / 5 (2) | 0 |
An immune system is a collection of biological processes within an organism that protects against disease by identifying and killing pathogens and tumour cells. It detects a wide variety of agents, from viruses to parasitic worms, and needs to distinguish them from the organism's own healthy cells and tissues in order to function properly. Detection is complicated as pathogens can evolve rapidly, producing adaptations that avoid the immune system and allow the pathogens to successfully infect their hosts.
To survive this challenge, multiple mechanisms evolved that recognize and neutralize pathogens. Even simple unicellular organisms such as bacteria possess enzyme systems that protect against viral infections. Other basic immune mechanisms evolved in ancient eukaryotes and remain in their modern descendants, such as plants, fish, reptiles, and insects. These mechanisms include antimicrobial peptides called defensins, phagocytosis, and the complement system. Vertebrates such as humans have even more sophisticated defense mechanisms. The immune systems of vertebrates consist of many types of proteins, cells, organs, and tissues, which interact in an elaborate and dynamic network. As part of this more complex immune response, the human immune system adapts over time to recognise specific pathogens more efficiently. This adaptation process is referred to as "adaptive immunity" or "acquired immunity" and creates immunological memory. Immunological memory created from a primary response to a specific pathogen, provides an enhanced response to secondary encounters with that same, specific pathogen. This process of acquired immunity is the basis of vaccination.
Disorders in the immune system can result in disease. Immunodeficiency occurs when the immune system is less active than normal, resulting in recurring and life-threatening infections. Immunodeficiency can either be the result of a genetic disease, such as severe combined immunodeficiency, or be produced by pharmaceuticals or an infection, such as the acquired immune deficiency syndrome (AIDS) that is caused by the retrovirus HIV. In contrast, autoimmune diseases result from a hyperactive immune system attacking normal tissues as if they were foreign organisms. Common autoimmune diseases include Hashimoto's Thyroiditis, rheumatoid arthritis, diabetes mellitus type 1 and lupus erythematosus. Immunology covers the study of all aspects of the immune system which has significant relevance to human health and diseases. Further investigation in this field is expected to play a serious role in promotion of health and treatment of diseases.
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