Questions about cartilage glutathione, answered.
Plain answers to what people ask about glutathione, cartilage cells and the ingredients that supply them. Each one opens with the short answer, then the detail, with every fact cited to a paper on PubMed.
Cartilage glutathione
What is cartilage glutathione?
Cartilage glutathione is the glutathione made and held inside chondrocytes, the cells that build and maintain joint cartilage. Glutathione is a small antioxidant the...
How do cartilage cells make glutathione?
Cartilage cells make glutathione in two enzyme steps. Glutamate cysteine ligase joins glutamate to cysteine, then glutathione synthetase adds glycine. How much a cell...
What happens to cartilage glutathione with age?
With age, cartilage cells tend to hold more of their glutathione in its used, oxidised form and cope worse with oxidative stress. In human cartilage cells, more than...
What does oxidative stress do to cartilage?
Oxidative stress is when a cell makes more reactive oxygen species than its antioxidants can clear. In cartilage it disrupts the cells' signalling and contributes to...
What is the GSH:GSSG ratio, and why does it matter for cartilage?
GSH is glutathione in its working, reduced form; GSSG is the used, oxidised form, two molecules joined. The GSH:GSSG ratio is a standard read-out of a cell's redox...
Does loading a joint use up cartilage glutathione?
In the short term, yes. In cow cartilage, cyclic compressive loading oxidised glutathione, and unloaded periods were needed for it to recover and for the tissue's total...
Cartilage has no blood supply. How are its cells fed?
Articular cartilage has no blood vessels, lymphatics or nerves. Its cells, which make up about 2% of its volume, are fed by the movement of water through the tissue as...
Raising glutathione
Can you raise glutathione by taking it by mouth?
The evidence is mixed. A single 3 g dose of oral glutathione did not raise plasma glutathione in healthy volunteers, because it was broken down in the gut and liver...
Glutathione or its building blocks: which raises glutathione?
Both routes have raised glutathione in people, measured in blood. Taking glutathione daily for months raised blood levels ((Richie 2015)), and supplying its building...
What is GlyNAC?
GlyNAC is a combination of glycine and N-acetylcysteine (NAC), two of glutathione's building blocks, studied as a way to correct glutathione deficiency in older adults....
The four parts
What does N-acetylcysteine (NAC) do in cartilage?
N-acetylcysteine (NAC) is a stable source of cysteine, the building block whose supply most limits how much glutathione a cell can make ((Lu 2013)). In cartilage cells...
Why does glycine matter for cartilage?
Glycine is one of the three building blocks of glutathione, and it is also the most common amino acid in collagen, making up about one in every three. In cow cartilage...
What does glutamine do for cartilage cells?
Glutamine is the cell's main source of glutamate, the first building block of glutathione. In growth-plate cartilage, the identity switch SOX9 raised glutamine use, and...
What does alpha-lipoic acid do for cartilage glutathione?
Alpha-lipoic acid, once reduced inside cells to dihydrolipoic acid, raises cellular glutathione by helping cells take up cysteine, mainly in cells that are short of it...
Connections
How are cartilage glutathione and MMP13 connected?
Oxidative stress is one of the signals that switches on MMP13, the enzyme that cuts cartilage collagen. In cells from healthy human cartilage, hydrogen peroxide raised...
What is ferroptosis, and what does it have to do with cartilage glutathione?
Ferroptosis is an iron-dependent form of cell death driven by damage to cell membranes. GPX4, an enzyme that needs glutathione to work, is the cell's main brake on it....