Not exact matches
This may entail making small holes in the bone to allow new cartilage to grow (microfracture), taking cartilage
from another part of the athlete's knee and transplanting it into the defect (osteochondral autograft transfer), taking cartilage cells
from the knee and then having them grown in a lab for later re-implantation (autologous
chondrocyte implantation), or taking cartilage
from a person who has passed away and placing it in the defect (osteochondral allograft transfer).
Then, to boost the number of cells, which is another hurdle in tissue engineering, the researchers mixed the
chondrocytes with human mesenchymal stem cells
from bone marrow.
Preliminary data
from in vivo testing over 60 days show the combination does indeed encourage
chondrocyte and cartilage production.
To create a new bioink, Gatenholm's team mixed polysaccharides
from brown algae and tiny cellulose fibrils
from wood or made by bacteria, as well as human
chondrocytes, which are cells that build up cartilage.
«Cartilage cells (or
chondrocytes) isolated and expanded
from cartilage tissue have great potential as a cell - based therapy for patients with, for example, traumatic cartilage defects,» says Juha Piltti, doctoral student at the Department of Integrative Medical Biology.
Researchers at the Feinstein Institute know how to make cartilage
from a mixture of cells called
chondrocytes, nutrients to feed them, and collagen, which holds it all together.
Furthermore, organ cultured cartilage
from ACH mice treated with statin resulted in increased expression of the aforementioned three genes and also in Runx2 and Col10a1, which indicated that statin stimulated both the differentiation and maturation of ACH mouse
chondrocytes.
Additional tests in tissue samples
from osteoarthritic patients who had joint replacements at NYU Langone found similarly increased levels of adenosine A2A receptors on
chondrocytes.
Cronstein and his team also found that levels of adenosine A2A receptors went up on rat
chondrocytes when osteoarthritis was present, in what the researchers say was a «failed attempt» to compensate for the loss of adenosine
from the energy - processing (metabolic) changes underlying the inflammation.
According to the research team, the relevance of their findings to human disease was validated using
chondrocytes isolated
from arthritic patients.
These cells included
chondrocytes (cartilage cells) that were made
from mesenchymal stem cells that had been taken
from her bone marrow; turning these MSCs into
chondrocytes only took researchers three days.
In addition to iPS cells derived
from progeria - patients, the researchers successfully applied their method to adult mesenchymal stem cells, which can differentiate into a variety of cell types, including adipocytes, osteoblasts,
chondrocytes, cardiomyocytes, and, as described lately, beta - pancreatic islets cells.
In an attempt to bring patient - specific induced pluripotent stem cell (iPSCs) technology closer to the clinic, researchers have created iPSCs
from patient - derived
chondrocytes, using an non-integrative reprogramming method, and used these to then create large numbers of cartilage producing cells.
We investigated genes and pathways that mark OA progression in isolated primary
chondrocytes taken
from paired intact versus degraded articular cartilage samples across 38 patients undergoing joint replacement surgery (discovery cohort: 12 knee OA, replication cohorts: 17 knee OA, 9 hip OA patients).
Both control iPSCs derived
from BJ fibroblasts (f - iPSCs) and
chondrocyte derived - iPSCs (C - iPSCs) were fully pluripotent and genomically stable (See figure), and were first differentiated in a monolayer exposing the iPSCs in a defined, three stage manner to activin A, WNT3A, FGF2, BMP4, follistatin, GDF5, and neurotrophin 4.