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    Home > Biochemistry News > Biotechnology News > Infectious pathogens cause cancer, does cancer spread directly? (The top five carcinogens)

    Infectious pathogens cause cancer, does cancer spread directly? (The top five carcinogens)

    • Last Update: 2020-08-04
    • Source: Internet
    • Author: User
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    Do 13% of new cancer cases worldwide are due to infectious diseases? According to a recent statistical report by the Team of the World Health Organization's International Cancer Research Institute published by Lancet Global Health, the top five cancer-causing factors are: Helicobacter pylori, human papillomavirus (HPV), hepatitis B virus, hepatitis C virus and human herpes virus (EBvirus).
    infectious pathogens cause cancer, will cancer spread directly? "Cancer itself does not spread. Wang Donglin, director of oncology at Chongqing University's affiliated oncology hospital, said that from the mechanism of occurrence, cancer is not contagious, but the viruses and bacteria that cause it can be transmitted.

    in particular, family members may be affected by the same carcinogenic factors or triggers due to long-term life.
    will not be transmitted through daily life under normal circumstances, the body's tissue cells are genetically controlled, the biological behavior of cells such as growth, proliferation, etc. is orderly, there will be no confusion.
    but when the human body is exposed to carcinogens for a long time, such as chemical carcinogens, radiation, certain bacteria and viruses, it causes the gene to mutate, causing the cells to grow out of control, these out-of-control cells, that is, cancer cells in the body "crazy long", forming lumps (or tumors).
    experts, the occurrence of cancer is in the external environment, living habits, diet and exercise and other external factors under the joint action of the cellular gene changes results.
    " cancer can be seen as a chronic disease.
    " Wang Donglin said that from normal cell development to cancer cells usually take more than a decade to decades, is a multi-factor, multi-stage, complex and gradual process.
    thetheory, if a cancer is transmitted, it must meet two conditions: the patient's cancer cells can enter the healthy person's body and the cancer cells can survive and grow in healthy people.
    first, cancer cells are very large, it is difficult to enter the normal healthy body through daily transmission channels such as breathing, diet and contact;
    Wang Donglin says there have been no clinical reports of cancer infections so far.
    and in practice, the incidence of cancer is not higher than that of doctors and nurses who have been in contact with cancer patients for a long time in cancer hospitals.
    therefore, it is certain that cancer is not transmitted through everyday lifestyles such as kissing, touching, sex, and sharing cutlery.
    people with a higher risk of genetic susceptibility to cancer are not contagious, but may be inherited.
    " tumor is a multi-gene genetic susceptibility to disease, often the phenomenon of family aggregation.
    simple understanding, is that the occurrence and development of tumors are more or less related to genetic factors. Yi Lin, deputy director of the medical examination department of Chongqing University Affiliated Oncology Hospital, said that genetic factors play a very important role in the development of tumors, and from a genetic point of view, they can be classified into inherited tumors, tumors with genetic susceptibility to tumors, and dispersive tumors.

    comes after Hollywood actress Angelina Jolie underwent a preventive double mastectomy. The reason
    is that genetic tests revealed that she had inherited the mutated cancer susceptibility gene BRCA1 from her mother, and that she had an 87 percent chance of developing breast cancer in her lifetime.
    Yilin said that although there was an uproar at the time, the matter caused further concern about the genetic susceptibility of cancer.
    Yilin said that the current common, more clearly studied solid tumors are hereditary breast cancer, hereditary ovarian cancer, hereditary non-polypsised colorectal cancer and so on.
    the occurrence of such malignancies is often closely related to genetic mutations, if the disease-causing mutations that cause tumors occur at the reproductive cell level, then the family of descendants of the mutation will have a much higher risk of developing tumors than normal populations.
    said that more familiar is that in hereditary breast and ovarian cancer, the BRCA1/BRCA2 gene mutation is more likely to cause disease, about 40%-50% of hereditary breast cancer is caused by the BRCA1/BRCA2 gene mutation, there are literature reports carrying BRCABRC People with A1 gene mutations have a lifetime risk of breast and ovarian cancer at 50%-85% and 15%-45%, respectively, and those with BRCA2 gene mutations have a risk of 50%-85% and 10%-20%, respectively, breast and ovarian cancer.
    need to be clear that the term "relative" in the genetic analysis is a "blood relative" who is related to each other by blood.
    viruses and bacteria that cause cancer to spread" the cancer is not contagious, but does not mean that the viruses and bacteria that cause cancer are not transmitted.
    " Wang Donglin said that some cancers occur with some microbial infections, such as liver cancer and hepatitis B virus infection, although liver cancer will not be transmitted, but hepatitis B is an infectious disease, should pay attention to prevention and treatment.
    the occurrence of stomach cancer and stomach helicobacter pylori infection, Helicobacter pylori through daily close contact through the digestive tract infection, once infected with Helicobacter pylori, but also timely treatment.
    there is "family cancer" between husband and wife? Will you get the same kind of cancer? Mr Wang said it was possible.
    , however, it is not the result of infection, but the result of a common lifestyle, diet and environment.
    family living together for a long time, exposed to the same family environment, living, eating and living environment is basically the same, over time, we may be affected by the same carcinogenic factors or triggers.
    , for example, some people in the family like to eat smoked bacon products, pickles and other foods, often form a common family diet structure and habits, these long-term consumption of these foods will lead to the occurrence of certain digestive tract cancer.
    , like, some kind of food on the table mold, but the whole family are eating, it is not known that the mold in the food carcinogens will increase the risk of liver cancer, stomach cancer.
    family members live in a relatively small closed environment, if the indoor air there are certain carcinogens, such as kitchen smoke pollution, or family members smoking, coupled with poor ventilation, we breathe the same air, the air carcinogens will become a common cause of cancer for family members.
    , the study suggests that people's emotions have an effect on immune function.
    family atmosphere often infects and affects everyone in the family, a harmonious, humorous and laugh-filled family, will make people happy, and depression, will lead to decreased immune function.
    many experts said that "family cancer" is scientifically based, so in the family, we must maintain a common living environment, develop good family living habits, establish a harmonious family atmosphere, common anti-cancer.
    linked cancer is a chronic disease, the World Health Organization puts it: one-third of cancers are completely preventable, one-third of cancers can be cured early, and one-third can use existing medical practices to prolong life, reduce pain and improve quality of life. Wang Donglin,
    , said cancer is a chronic disease and should also be considered a lifestyle disease.
    there is strong evidence that smoking, drinking, obesity, stress, lack of exercise, etc. are all high risk factors for cancer.
    so, do "three early" - early detection, early diagnosis, early treatment, can maximize the prevention of cancer, improve cancer survival rate.
    here, experts suggest that you can pay attention to the following five points in your daily life.
    1. Quit smoking and limit alcohol.
    smokers are 7 to 11 times more likely to develop cancer than nonsmokers.
    long-term excessive drinking will also greatly increase the liver, esophagus, stomach and other organs of damage, will inevitably increase the incidence of liver cancer, esophagus cancer, stomach cancer.
    2. Eating hygiene.
    long-term eating of overheated, too cold, too salty, too spicy, too sour food can directly cause damage to digestive organs;
    3. Combine stoue.
    long-term mental stress or insomnia, will inevitably lead to body loss, immune function decline, endocrine disorders, a variety of physical and mental diseases, eventually leading to malignant tumors.
    4. Increase resistance.
    according to their own physical condition and physical fitness, choose the right aerobic exercise.
    5. Air pollution protection.
    the presence of carcinogens in air pollutants, environmental protection and governance and personal protection are very important.
    Source: Science and Technology Daily Li Correspondent Xiong Zhixiang.
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