Respiratory disease is a common disease, frequently-occurring disease, the main lesion in the trachea, bronchi, lung and chest, lesions are more cough, chest pain, respiratory effects, severe breathing difficulties, hypoxia, and even respiratory failure and death. Due to air pollution, smoking and other factors, The chronic obstructive pulmonary disease is increasing including chronic bronchitis, emphysema, pulmonary heart disease, bronchial asthma, lung cancer, pulmonary diffuse interstitial fibrosis, and pulmonary infection the morbidity and mortality of the disease at home and abroad . Therefore, Anti-Respiratory disease drugs are also more and more attention paid by researchers. Respiratory disease have the symptoms of cough, sputum, hemoptysis, chest pain, shortness of breath and other symptoms of lack of specificity, often clinicians mistaken by people for colds, bronchitis, and severe pneumonia, tuberculosis or lung cancer and other diseases delayed diagnosis; Respiratory tract infection, to be developed to emphysema, pulmonary heart disease, respiratory failure was taken seriously, but it was too late, its pathology and physiological function has been difficult to reverse. As with other systemic diseases, careful and detailed medical history and physical examination are the basis for the diagnosis of respiratory diseases, and should be combined with routine laboratory tests and other special findings to conduct a comprehensive and comprehensive analysis. Currently the most clinical application of anti-respiratory disease drugs have the following four categories: 1. Antihistamines 2. Cough medicine 3. Bronchodilator 4. Expectorant 5. Anti-asthma Drugs.
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Transgenic mice breeders are professors and professors at Northwestern University, Professor Ariel Thunberg, who transplanted a newly discovered gene to mice. The gene promotes the overproduction of growth-related proteins called GAP-43 in the brain of transgenic mice. The protein acts on nerve endings, stimulates nerve growth, and provides more resources for brain memory functions.
In a labyrinth test of ability to memorize food sites, transgenic mice that overproduced CAP-43 protein in the brain performed better than normal rats with normal protein levels. In addition, the difference between the ability of transgenic mice and common mice appears to be greater at each test interval.
Scientists believe that the above study of transgenic mice has some clues about how memory works, and it may eventually be used to treat diseases related to brain degeneration and disorders, such as Alzheimer's disease.
The gene transplanted into experimental mice was the second single gene discovered by scientists to be able to effectively improve learning and memory. In September 1999, another U.S. research team confirmed that the gene called NR2B kept rats brains "young."
U.S. Develops Smart Transgenic Rats
American scientists have developed transgenic mice that produce more proteins in their brains that stimulate the growth of nerve fibers and have a stronger ability to learn. In the labyrinth experiments, the transgenic rats had much higher foraging ability than the ordinary rats, and at the same time, the memories of the food storage place in the maze were more clearly remembered. Through the development of transgenic mice, scientists further realized the importance of nerve growth in promoting brain function.