Posts Tagged ‘DNA’
Lung cancer
February 22nd, 2012 | 
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Description
A greater number of men and women, generally aged 65 to 75 years, died of lung cancer than any other cancer.
The majority of lung cancer develops in the bronchi, that is to say, in the upper airway leading to the lungs. There are different categories of lung cancer. The most common is lung cancer “non-small cell”, which includes adenocarcinoma, large cell carcinoma and squamous cell carcinoma. The other type of lung cancer is that of small cell carcinoma (or carcinoma cells in “oat”).
Each category is evolving at a different rate and responds differently to treatment. Most lung cancers are smoking related, with the exception of adenocarcinoma. Often as a cancer that established in other parts of the body spreads to the lungs. Read the rest of this entry »
The papillomavirus
The papillomavirus human ( HPV ) are a group of small virus DNA splitting into two groups: those affecting the skin ( warts and molluscum contagiosum ) and those that affect the mucous membranes.
A very common disease
HPVs are widespread throughout the world. The infections affect papillomavirus very frequently women young. It is a sexually transmitted disease widespread.
The babies can be infected by their mothers at birth, but it is very rare.
The mucosal HPV infections are sexually transmitted diseases ( STDs ).
Papillomavirus infections usually lasts only a few months: the body’s natural defenses are usually sufficient to eliminate them. Read the rest of this entry »
Born with a genetic disease
More than 30 000 children born each year with a genetic disease. While some will say the first few months, others appear until adolescence or adulthood. Today, the tools used to detect these problems early, and organizations offering their support. The point not to remain alone with the disease.
While most children are born without problems, more than 30,000 babies are born with a genetic disease each year. Today, 3 million people live well with a health problem related to a change in their genes. Read the rest of this entry »
The Cancer Cell
As a cancer arises
The term “cancer” is not synonymous with a specific disease, because there are over a hundred different cancer types. This result, however, apparently by similar processes: the uncontrolled growth of diseased cells. The disease starts in one of about 30 trillion cells in the body that are constantly renewed.
The body is changing constantly. There is no stop in the regeneration and growth of cells: This is evident especially in hair and nails. This normal continuous growth is strictly controlled so that it does not lead to excessive cell proliferation. The “inner program” for the growth of the cell is located on the cell’s own DNA (or undocumented Deoxyribonucleic), the carrier of genetic information.
The single cell, however, live in isolation: Constantly bouncing outside influences on them can. Meanwhile, a variety of risk factors known to trigger a cancer of the:
Toxins in tobacco smoke
Solar radiation
Radioactivity
Certain fungi in food
Malnutrition
Some viral infections
Some chemicals Read the rest of this entry »
What is a gene?
1. Historical review
Mendel concluded from his breeding experiments with peas that transfer of traits genetic factors were responsible for
1900 chromosomes were identified as carriers of genetic
1909, the terms gene, genotype and phenotype introduced
in studies in Drosophila, Morgan suggests that a gene is a small part of a chromosome: one gene-one enzyme hypothesis
Molecular biology finally defined a gene as a DNA portion that encodes the amino acid sequence of a polypeptide chain
Now known fractional genes, the introns and exons are present in
In addition, there are specific beginning and ending sequences, which are translated into amino acid sequence of a not Read the rest of this entry »