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  • 1
    Electronic Resource
    Electronic Resource
    Change of complement C1s synthesis during development of hamster cartilage (1996)
    Springer
    Cell & tissue research 285 (1996), S. 199-204 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Bone ; Ossification ; Cartilage ; Chondrocytes ; Complement C1s ; Development ; Immunohistochemistry ; In situ hybridization ; Hamster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Expression of the first complement component (C1s) has been examined in chondrocytes of hamster epiphyseal cartilage during development and fracture healing. C1s is immunostained with anti-hamster C1s monoclonal antibody, PG11. The C1s staining increases in accordance with chondrocyte differentiation and reaches a maximal level in hypertrophic chondrocytes. This change is observed at both the tibia ossification center and at the callus in which the replacement of cartilage by bone marrow takes place. The concomitant increase of C1s and chondrocyte hypertrophy has been confirmed by RNA blot and by in situ hybridization. These results, in addition to previous findings on C1s collagenolytic and gelatinolytic activities, suggest C1s participation in cartilage remodeling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410050637
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  • 2
    Electronic Resource
    Electronic Resource
    Complement Cls, a classical enzyme with novel functions at the endochondral ossification center: immunohistochemical staining of activated Cls with a neoantigen-specific antibody (1997)
    Springer
    Cell & tissue research 288 (1997), S. 557-565 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Complement Cls ; Neoantigen ; Cartilage ; Hypertrophic chondrocyte ; Immunohistochemistry ; Rheumatoid arthritis ; Decorin ; Syrian hamster ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The secondary ossification center of 14- to 16-day-old hamster tibiae was examined immunohistochemically with active and inactive Cls-specific antibodies, RK5 and RK4, respectively. At the ossification center, chondrocytes differentiate from proliferating and hypertrophic to degenerating stages, and their site is occupied by the bone marrow. Cls was strongly immunostained in hypertrophic chondrocytes. In order to discover whether Cls is activated at a particular site, the cartilage was immunostained with RK5 and RK4. RK5 mainly reacted with degrading matrix around invading vessels. In contrast, RK4 strongly stained hypertrophic chondrocytes. Immunoelectron microscopy revealed Cls on degrading fragments of chondrocytes and fibers of cartilage matrix. Decorin, one of the major matrix proteoglycans, was dose and time dependently degraded by Cls. Type II collagen and type I gelatin were also degraded. Articular cartilage from patients with rheumatoid arthritis was positively immunostained (11/12 cases) with an anti-Cls monoclonal antibody (mAb) PG11, whereas normal articular cartilage (5/5 cases) was negative, suggesting Cls participation in the etiology of rheumatoid arthritis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410050841
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    Paper (German National Licenses)
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