(Medical Xpress) -- Expanding on previous research providing proof-of-principal that human stem cells can be genetically engineered into HIV-fighting cells, a team of UCLA researchers have now demonstrated that these cells ...
Apr 12, 2012
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A novel screening system developed at Kyoto University enables researchers to investigate sperm cell development and health at the molecular level.
Mar 5, 2024
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Every system in a living organism depends upon a finite supply of energy in order to function. In humans, no organ is more energy-intensive than the brain, which consumes about 20% of the body's metabolic energy.
Jan 25, 2024
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Gene therapy has great promise for treating genetic diseases, and even for more common diseases such as atherosclerosis (hardening of the arteries). Over the past decade, the gene-editing technology CRISPR (Clustered Regularly ...
Nov 16, 2023
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Researchers in Sweden have developed a microscale device for implantation in the eye, which presents new opportunities for cell-based treatment of diabetes and other diseases.
Oct 18, 2023
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A team of researchers has uncovered a previously unknown compensatory mechanism found in liver disease. If Kupffer cells (KCs), a specific kind of immune cells found in the liver, become impaired by tissue scarring, immune ...
Sep 28, 2023
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A protein responsible for lethal liver disease in mice infected with Rift Valley fever virus (RVFV) has been identified by scientists at the University of Pittsburgh Center for Vaccine Research. These results from new research ...
Jul 26, 2023
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To enjoy the scent of morning coffee and freshly baked cookies or to perceive the warning smell of something burning, the brain needs two types of cells, neurons and astrocytes, to work closely with each other. Research has ...
Jun 15, 2023
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Parents tell their children to eat all the food on their plate, down to the last crumb. Certain cells within our lymph nodes, like obedient children, diligently follow this instruction. Although these cells—a subtype of ...
Jun 12, 2023
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Just as people's joints can get stiff as they age and make it harder for them to move around, hair follicle stem cells also get stiff, making it harder for them to grow hair, reports a new Northwestern Medicine study.
Jun 5, 2023
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The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.
In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
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