Japanese researchers have announced that they have developed a technique for efficiently producing hematopoietic stem cells using induced multifunctional stem cells (iPS cells) from experimental mice. When doctors treat leukemia in the future, they are expected to use this technology to create a large number of hematopoietic stem cells to replace bone marrow transplantation.
Researchers at the Tokyo Metropolitan Institute of Clinical Medicine and Osaka University used iPS cells to create mesoderm cells. Such cells can develop into tissues such as blood vessels and muscles. The researchers then implanted the LhX2 gene into the mesoderm cells and eventually generated a large number of hematopoietic stem cells.
The researchers next irradiated the experimental mice with radiation to make them lose hematopoietic function, and then transplanted the hematopoietic stem cells obtained by the above method into a part of the experimental mice. The results showed that compared with the experimental mice that did not receive hematopoietic stem cell transplantation, the experimental mice that received transplantation prolonged their lives significantly and survived for 4 months.
The researchers pointed out that when iPS cells were used to cultivate hematopoietic stem cells, it was difficult to simply generate hematopoietic stem cells and mix with other cells. The new technology developed this time made the generation efficiency of hematopoietic stem cells four or five times that of the original method.
At present, when treating leukemia patients, the main purpose is to transplant normal human bone marrow that is close to the patient's blood type to use the hematopoietic stem cells to help the patient recover. The researchers hope to use this new technology for leukemia treatment in humans after confirming safety. Related papers have been published in the new issue of the online edition of the American magazine "Blood".
Leisure chairs are a type of furniture used for rest, relaxation, and enjoyment, typically with comfortable seat and backrest designs to provide optimal comfort and support. There are a wide variety of leisure chairs that can be classified based on different functions, materials, styles, and uses. The following will introduce several common categories of leisure chairs.
1. Classification by function:
-Lying chair: Lying chair is a leisure chair that can adjust its angle to meet different needs, and can be used for lying, reading, resting, or sunbathing.
-Lazy chair: Lazy chair is a large and comfortable leisure chair, usually with a wide seat and backrest, which allows people to sit or lie comfortably.
-Leisure sofa: A leisure sofa is a leisure chair with multiple seats that can be used by multiple people at the same time and is usually used for family entertainment or leisure activities.
2. Classification by style:
-Modern style chairs: Modern style chairs usually adopt simple lines and modern design, with fashionable and minimalist characteristics, suitable for modern home decoration.
-Classical style chairs: Classical style chairs usually adopt retro designs and exquisite carvings, with elegant and luxurious characteristics, suitable for classical style home decoration.
-Nordic style chairs: Nordic style chairs usually adopt a simple and natural design, emphasizing practicality and comfort, suitable for Nordic style home decoration.
3. Classification by purpose:
-Indoor leisure chairs: Indoor leisure chairs are suitable for indoor environments such as homes and offices, and can be used for activities such as rest, reading, and watching TV.
-Outdoor leisure chairs: Outdoor leisure chairs are suitable for outdoor environments such as gardens, balconies, terraces, etc., and can be used for outdoor leisure, sun exposure, and other activities.
In short, leisure chairs are multifunctional and diverse furniture that can be chosen according to different needs and preferences. Whether relaxing at home or enjoying the sunshine outdoors, you can find suitable leisure chairs for yourself.
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