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American journal of veterinary research2000; 61(8); 900-905; doi: 10.2460/ajvr.2000.61.900

Comparison of Northern blot hybridization and a reverse transcriptase-polymerase chain reaction technique for measurement of mRNA expression of metalloproteinases and matrix components in articular cartilage and synovial membrane from horses with osteoarthritis.

Abstract: To determine relative amounts of mRNA expression of aggrecan, type-II collagen, matrix metalloproteinase (MMP) 1, and MMP3 in articular cartilage and synovial membrane samples from healthy equine joints and joints with osteoarthritis (OA) and to compare results of Northern blot hybridization with results of a reverse transcriptase-polymerase chain reaction (RT-PCR) assay. Methods: Articular cartilage samples from 8 pairs of joints (1 with OA and 1 healthy) from 6 horses and synovial membrane samples from 6 pairs of joints from 5 horses. Methods: RNA was extracted from samples by use of a modified Trizol procedure. Northern blot hybridization and the RT-PCR assay were performed; results were quantitated by use of glyceraldehyde 3-phosphate dehydrogenase as an internal standard. Results: Articular cartilage samples from joints with mild or moderate OA yielded less total RNA than samples from joints with severe OA. Northern blot hybridization indicated that type-II collagen mRNA expression in articular cartilage samples from joints with OA was significantly greater than expression in samples from healthy joints. The RT-PCR assay identified low levels of MMP3 mRNA expression in 4 of 8 sets of articular cartilage samples and 4 of 6 sets of synovial membrane samples, whereas Northern blot hybridization identified MMP3 mRNA expression in only 1 of 6 sets of articular cartilage samples and 1 of 6 sets of synovial membrane samples. Conclusions: A RT-PCR assay is more sensitive than Northern blot hybridization for detection of MMP3 mRNA expression in articular cartilage and synovial membrane and requires smaller samples.
Publication Date: 2000-08-22 PubMed ID: 10951979DOI: 10.2460/ajvr.2000.61.900Google Scholar: Lookup
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  • Comparative Study
  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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The research article presents a comparative study of the use of Northern blot hybridization and a reverse transcriptase-polymerase chain reaction (RT-PCR) technique for measuring mRNA expression of certain proteins and components involved in osteoarthritis in horses.

About The Research

  • In this study, researchers are attempting to accurately measure the mRNA expression of aggrecan, type-II collagen, matrix metalloproteinase (MMP) 1, and MMP3. These components play crucial roles in joint health and are often associated with conditions such as osteoarthritis (OA).
  • The subjects were articular cartilage and synovial membrane samples derived from eight pairs of equine joints, with one joint with osteoarthritis and one healthy pair from each of six horses.
  • Additionally, synovial membrane samples were also gathered from six pairs of joints from five horses. Articular cartilage is a connective tissue that coats the surface of joints, while synovial membrane encloses the joint cavity and secretes synovial fluid that reduces friction in joints during movement.
  • The overall objective was to compare the efficiency of Northern blot hybridization with that of a RT-PCR assay in quantifying mRNA expression of the aforementioned components.

Methods and Findings

  • The researchers extracted RNA from the joint samples using a modified Trizol procedure, and then applied Northern blot hybridization and RT-PCR.
  • They found that articular cartilage samples from joints with mild or moderate osteoarthritis yielded less total RNA than samples from joints with severe OA.
  • Northern blot hybridization revealed that type-II collagen mRNA expression in OA cartilage samples was significantly higher than in healthy samples. However, when using the RT-PCR assay, they were able to identify low levels of MMP3 mRNA expression in four sets of articular cartilage and synovial membrane samples.
  • On the contrary, Northern blot hybridization only detected MMP3 mRNA expression in one set of the same samples. This significant variance in results led the researchers to conclude that the RT-PCR assay is more sensitive than Northern blot hybridization, and additionally requires smaller samples.

Implications of the Findings

  • The higher sensitivity of the RT-PCR assay in detecting mRNA expressions gives it a clear advantage over Northern blot hybridization, as it may allow for earlier detection of osteoarthritis through monitoring shifts in the expression levels of aggrecan, type-II collagen, MMP1, and MMP3.
  • Moreover, requiring smaller samples makes RT-PCR assay a less invasive method, which is important in the field of veterinary medicine, for the welfare of the animals under study.

Cite This Article

APA
Fehr JE, Trotter GW, Oxford JT, Hart DA. (2000). Comparison of Northern blot hybridization and a reverse transcriptase-polymerase chain reaction technique for measurement of mRNA expression of metalloproteinases and matrix components in articular cartilage and synovial membrane from horses with osteoarthritis. Am J Vet Res, 61(8), 900-905. https://doi.org/10.2460/ajvr.2000.61.900

Publication

ISSN: 0002-9645
NlmUniqueID: 0375011
Country: United States
Language: English
Volume: 61
Issue: 8
Pages: 900-905

Researcher Affiliations

Fehr, J E
  • Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.
Trotter, G W
    Oxford, J T
      Hart, D A

        MeSH Terms

        • Aggrecans
        • Animals
        • Blotting, Northern / veterinary
        • Cartilage, Articular / chemistry
        • Cartilage, Articular / pathology
        • Collagen / analysis
        • Collagen / biosynthesis
        • Collagen / physiology
        • DNA Primers / chemistry
        • Extracellular Matrix Proteins / analysis
        • Extracellular Matrix Proteins / biosynthesis
        • Extracellular Matrix Proteins / physiology
        • Gene Expression Regulation
        • Horse Diseases / pathology
        • Horses
        • Image Processing, Computer-Assisted
        • Joints / pathology
        • Lectins, C-Type
        • Matrix Metalloproteinase 1 / analysis
        • Matrix Metalloproteinase 1 / biosynthesis
        • Matrix Metalloproteinase 1 / physiology
        • Matrix Metalloproteinase 3 / analysis
        • Matrix Metalloproteinase 3 / biosynthesis
        • Matrix Metalloproteinase 3 / physiology
        • Matrix Metalloproteinases / analysis
        • Matrix Metalloproteinases / biosynthesis
        • Matrix Metalloproteinases / physiology
        • Osteoarthritis / pathology
        • Osteoarthritis / veterinary
        • Proteoglycans / analysis
        • Proteoglycans / biosynthesis
        • Proteoglycans / physiology
        • RNA, Messenger / chemistry
        • RNA, Messenger / isolation & purification
        • Reverse Transcriptase Polymerase Chain Reaction / veterinary
        • Synovial Membrane / chemistry
        • Synovial Membrane / pathology

        Citations

        This article has been cited 15 times.
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