Suppressive Effects of the Standardized Extract of Phyllanthus amarus on Type II Collagen-induced Rheumatoid Arthritis in Sprague Dawley Rats

2019 ◽  
Vol 19 (14) ◽  
pp. 1156-1169
Author(s):  
Javaid Alam ◽  
Ibrahim Jantan ◽  
Endang Kumolosasi ◽  
Mohd A. Nafiah ◽  
Muhammed A. Mesaik
Keyword(s):  
Rheumatoid Arthritis ◽  
Type Ii Collagen ◽  
Phyllanthus Amarus ◽  
Type Ii ◽  
Sprague Dawley ◽  
Sprague Dawley Rats

scholarly journals Effects of relaxin, pregnancy and parturition on collagen metabolism in the rat pubic symphysis

1998 ◽  
Vol 159 (1) ◽  
pp. 117-125 ◽  
Author(s):  
CS Samuel ◽  
JP Coghlan ◽  
JF Bateman
Keyword(s):  
Gel Electrophoresis ◽  
Late Pregnancy ◽  
Type Ii Collagen ◽  
Pubic Symphysis ◽  
Collagen Metabolism ◽  
Collagen Content ◽  
Type Ii ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
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The aim of this study was to examine the changes in collagen metabolism that occur during pregnancy and parturition and upon relaxin administration to the rat pubic symphysial interpubic tissue. Pubic symphyses were collected from non-pregnant, and intact and ovariectomised pregnant Sprague-Dawley rats at days 15, 18 and 21 of pregnancy as well as during and after delivery, and analysed for collagen content and solubility. SDS-PAGE was used to determine collagen composition. During pregnancy and particularly during birth, there was a significant reduction in both the tissue wet (57+/-3%) and dry (43+/-3%) weight (n=7), which coincided with a significant increase in water content (to 80%) and was attributed to a significant (P<0.05) reduction in overall tissue collagen content (by 47+/-2%). This resulted in both soluble (10%) and insoluble (90%) collagen levels being reduced, but gel electrophoresis demonstrated the presence of types I, II and V collagen in all samples. Western blot analysis confirmed the presence of type II collagen throughout pregnancy, confirming that the rat pubic symphysis remained a fibrocartilaginous tissue throughout gestation. In the absence of the ovaries and hence relaxin, tissue collagen content and solubility were not significantly different from control measurements. However, tissues of ovariectomised animals treated with oestrogen and progesterone (pellets) and relaxin (injection) contained collagen levels that mimicked those of late pregnancy and parturition. These results suggest that relaxin plays an important role in regulating collagen catabolism during gestation in the rat.

scholarly journals A Novel High Sensitivity Type II Collagen Blood-Based Biomarker, PRO-C2, for Assessment of Cartilage Formation

2018 ◽  
Vol 19 (11) ◽  
pp. 3485 ◽  
Author(s):  
Yunyun Luo ◽  
Yi He ◽  
Ditte Reker ◽  
Natasja Gudmann ◽  
Kim Henriksen ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Growth Factor ◽  
Knee Osteoarthritis ◽  
High Sensitivity ◽  
Type Ii Collagen ◽  
Cartilage Explants ◽  
Type Ii ◽  
Serum Samples ◽  
Human Cartilage ◽  
Cartilage Formation

N-terminal propeptide of type II collagen (PIINP) is a biomarker reflecting cartilage formation. PIINP exists in two main splice variants termed as type IIA and type IIB collagen NH2-propeptide (PIIANP, PIIBNP). PIIANP has been widely recognized as a cartilage formation biomarker. However, the utility of PIIBNP as a marker in preclinical and clinical settings has not been fully investigated yet. In this study, we aimed to characterize an antibody targeting human PIIBNP and to develop an immunoassay assessing type II collagen synthesis in human blood samples. A high sensitivity electrochemiluminescence immunoassay, hsPRO-C2, was developed using a well-characterized antibody against human PIIBNP. Human cartilage explants from replaced osteoarthritis knees were cultured for ten weeks in the presence of growth factors, insulin-like growth factor 1 (IGF-1) or recombinant human fibroblast growth factor 18 (rhFGF-18). The culture medium was changed every seven days, and levels of PIIBNP, PIIANP, and matrix metalloproteinase 9-mediated degradation of type II collagen (C2M) were analyzed herein. Serum samples from a cross-sectional knee osteoarthritis cohort, as well as pediatric and rheumatoid arthritis samples, were assayed for PIIBNP and PIIANP. Western blot showed that the antibody recognized PIIBNP either as a free fragment or attached to the main molecule. Immunohistochemistry demonstrated that PIIBNP was predominately located in the extracellular matrix of the superficial and deep zones and chondrocytes in both normal and osteoarthritic articular cartilage. In addition, the hsPRO-C2 immunoassay exhibits acceptable technical performances. In the human cartilage explants model, levels of PIIBNP, but not PIIANP and C2M, were increased (2 to 7-fold) time-dependently in response to IGF-1. Moreover, there was no significant correlation between PIIBNP and PIIANP levels when measured in knee osteoarthritis, rheumatoid arthritis, and pediatric serum samples. Serum PIIBNP was significantly higher in controls (KL0/1) compared to OA groups (KL2/3/4, p = 0.012). The hsPRO-C2 assay shows completely different biological and clinical patterns than PIIANP ELISA, suggesting that it may be a promising biomarker of cartilage formation.

scholarly journals Thecomparisonofserumbiomarkersin patients with osteoarthritisand rheumatoidarthritis

2018 ◽  
Vol 6 (2) ◽  
pp. 1-11
Author(s):  
Almandlawi S G ◽  
Ahmed A S
Keyword(s):  
Rheumatoid Arthritis ◽  
Vitamin D ◽  
Alkaline Phosphatase ◽  
Parathyroid Hormone ◽  
Calcium Phosphate ◽  
Serum Vitamin ◽  
Type Ii Collagen ◽  
Healthy Controls ◽  
Type Ii ◽  
Serum Vitamin D

Introduction: This study aims to assess the status of serum vitamin D, parathyroid hormone, type II collagen, calcium, phosphate,albumin, and alkaline phosphatase in osteoarthritis and rheumatoidarthritis patients and to study their association with rheumatoid arthritis disease activity. Materials and Methods: This prospectivecross-sectional study was conducted at the clinical analysis department, College of Pharmacy, Hawler Medical University in 2017.They study samples were collected at Rizgary Teaching Hospitalduring the period September 2015 to January 2016. A total of(N=156) participants were included: (N=53) patients with rheumatoid arthritis (RA), (N=53) with osteoarthritis (OA), and (N=50)healthy controls. Enzyme Linked Immuno Sorbent Assay kits determined serum vitamin D, parathyroid hormone, and type II collagen; and serum albumin, calcium, phosphate and alkaline phosphatase, were determined by standard colorimetric methods. Resultsand Discussion: Statistically significant higher levels of parathyroid hormone and type II collagen, with lower levels of Vitamin D,were found in the osteoarthritis group than the rheumatoid arthritisgroup and the healthy controls (P=0.007, P<0.001, P= 0.005) respectively. Multiple linear regression showed a statistically significant difference in serum type II collagen as a dependent variable, inpatients suffering from RA or OA compared to the healthy controlgroup; after adjusting for the effect of other independent studyvariables, there was a mean increase of (45.90 nmol/L, P<0.001)in RA patients, and OA patients showed greater levels of type IIcollagen (73.950 nmol/L) than the health control group (P<0.001).Conclusions: Elevated type II collagen levels, in conjunction witha low vitamin D status, may be strong discriminator between osteoarthritis and rheumatoid arthritis patients.

Type II Collagen Autoimmunity in Rheumatoid Arthritis

2004 ◽  
Vol 327 (4) ◽  
pp. 202-211 ◽  
Author(s):  
Wan-Uk Kim ◽  
Mi-La Cho ◽  
Young Ok Jung ◽  
So-Youn Min ◽  
Sung-Whan Park ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Type Ii Collagen ◽  
Type Ii

Synthesis of an Array of Triple-Helical Peptides from Type II Collagen for Multiplex Analysis of Autoantibodies in Rheumatoid Arthritis

2020 ◽  
Vol 15 (9) ◽  
pp. 2605-2615
Author(s):  
Johan Viljanen ◽  
Erik Lönnblom ◽  
Changrong Ge ◽  
Jie Yang ◽  
Lei Cheng ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Type Ii Collagen ◽  
Type Ii ◽  
Helical Peptides ◽  
Multiplex Analysis
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