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Open AccessJournal ArticleDOI

Carrageenin‐induced arthritis

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TLDR
A localized inflammatory response was initiated by both single and repeated injections of carrageenin into femorotibial joints, and an inhibition in the in vitro rate of proteoglycan synthesis was detected 72 hours after the injection.
Abstract
A localized inflammatory response was initiated by both single and repeated injections of carrageenin into femorotibial joints. Histologic changes were observed 24 hours after a single intraarticular injection, and an inhibition in the in vitro rate of proteoglycan synthesis was detected 72 hours after the injection. This inhibition was relieved in vitro by the addition of beta-D-xyloside, an exogenous initiator of glycosaminoglycan biosynthesis. Following repeated carrageenin injections, most cells appeared to be dead on histologic examination and no in vitro proteoglycan synthesis could be detected; nor could any stimulation be achieved by adding exyloside.

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Book ChapterDOI

The Chemistry of the Ground Substance of Joint Cartilage

I.H.M. Muir
TL;DR: This chapter discusses the general composition of cartilage, glycosaminoglycans, keratan sulfate, hyaluronic acid, and proteoglycane, which accounts for about half the dry weight of human adult articular cartilage.
Journal Article

Antigen-induced and zymosan-induced arthritis in mice: studies on in vivo cartilage proteoglycan synthesis and chondrocyte death.

TL;DR: It would appear that, in addition to enzymatic breakdown of cartilage, other phenomena are important in cartilage destruction: inhibition of proteoglycan synthesis and chondrocyte death, apparently unrelated to pannus formation.
Journal ArticleDOI

The mouse patella assay

TL;DR: In this article, an easy method of quantitating articular cartilage chondrocyte function in mice is described, using a defined and anatomically intact cartilage structure, the patella.
Journal ArticleDOI

Juxtaarticular bone loss in experimental inflammatory arthritis.

TL;DR: The osteopenia associated with experimental inflammatory arthritis was studied by a histomorphometric method that exphasized net changes in bone composition and it was calculated that an even greater increase in total bone resorption was responsible for the negative bone balance.
Journal ArticleDOI

Antigen‐induced arthritis. decreased proteoglycan content and inhibition of proteoglycan synthesis in articular cartilage

TL;DR: Cartilage from inflamed joints generally exhibited a decreased ability to synthesize proteoglycan in vitro, and an arthritis induced in rabbits immunized with human serum albumin by injection of antigen into the hind knee joint was noted.
References
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Journal ArticleDOI

A modified uronic acid carbazole reaction

TL;DR: It has been found possible to distinguish betweenHeparin, heparin derivatives, and other polyuronides of connective tissue by comparing the effect of chlorides on the color yield in both procedures by modifying Dische's carbazole reaction for uronic acid in the presence of borate.
Journal ArticleDOI

Determination of hydroxyproline.

TL;DR: A critical review is given of hydroxyproline analysis, finding a procedure which is faster and more sensitive than the former one and as reliable.
Journal ArticleDOI

Biological properties of carrageenan

TL;DR: This review highlights the peculiar features of granuloma induced by carrageenan, its actions on blood coagulation and the kinin system, the contrasting observations reported on its effects on peptic ulcer, its recently discovered immunological properties as well as its interference in immune phenomena.
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