Preview

Modulation of gene

Good Essays
Open Document
Open Document
5803 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Modulation of gene
Journal of Biomaterials
Applications
http://jba.sagepub.com/

Modulation of Gene Expression of Rabbit Chondrocytes by Dynamic
Compression in Polyurethane Scaffolds with Collagen Gel Encapsulation
Peng-Yuan Wang, Hsiang-Hong Chow, Wei-Bor Tsai and Hsu-Wei Fang
J Biomater Appl 2009 23: 347 originally published online 12 August 2008
DOI: 10.1177/0885328208093684
The online version of this article can be found at: http://jba.sagepub.com/content/23/4/347 Published by: http://www.sagepublications.com Additional services and information for Journal of Biomaterials Applications can be found at:
Email Alerts: http://jba.sagepub.com/cgi/alerts
Subscriptions: http://jba.sagepub.com/subscriptions
Reprints: http://www.sagepub.com/journalsReprints.nav
Permissions: http://www.sagepub.com/journalsPermissions.nav
Citations: http://jba.sagepub.com/content/23/4/347.refs.html

>> Version of Record - Jan 6, 2009
OnlineFirst Version of Record - Aug 12, 2008
What is This?

Downloaded from jba.sagepub.com by guest on July 3, 2013

Modulation of Gene Expression of
Rabbit Chondrocytes by Dynamic
Compression in Polyurethane
Scaffolds with Collagen Gel
Encapsulation
PENG-YUAN WANG, HSIANG-HONG CHOW AND WEI-BOR TSAI*
Department of Chemical Engineering, National Taiwan University
Taipei, Taiwan

HSU-WEI FANG
Department of Chemical Engineering and Biotechnology
National Taipei University of Technology, Taipei, Taiwan

ABSTRACT: Chondrocytes have been demonstrated to be sensitive to mechanical stimuli, such as compression, tension, shear force, and hydrostatic pressure.
The responses of chondrocytes to mechanical compression have been often studied in vitro with cartilage and chondrocyte/hydrogel systems. The aim of this study was to investigate the effects of dynamic compression on gene expression of rabbit chondrocytes which were seeded in elastic polyurethane scaffolds with or without collagen gel encapsulation. Dynamic compression of 20% or 30%



Citations: http://jba.sagepub.com/content/23/4/347.refs.html >> Version of Record - Jan 6, 2009 OnlineFirst Version of Record - Aug 12, 2008 What is This? Downloaded from jba.sagepub.com by guest on July 3, 2013 Modulation of Gene Expression of Los Angeles, London, New Delhi and Singapore Downloaded from jba.sagepub.com by guest on July 3, 2013 Downloaded from jba.sagepub.com by guest on July 3, 2013 Modulation of Gene Expression of Chondrocytes by Dynamic Compression 349

You May Also Find These Documents Helpful

  • Satisfactory Essays

    4. Pain: nociceptors. Touch: Merkel disks, Meissner corpuscle, Ruffini corpuscle, and Krause corpuscle. Pressure: Pacinian corpuscle and Meissner corpuscle. Stretch:…

    • 427 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Chapter 10 Gene Technology

    • 2264 Words
    • 10 Pages

    When RNA polymerase makes an unprocessed mRNA copy of DNA, the copy is called the ___________________.…

    • 2264 Words
    • 10 Pages
    Powerful Essays
  • Good Essays

    Cartilage and Bone

    • 511 Words
    • 3 Pages

    Cartilage can be found in the human body both around joints as well as in certain hard but not inflexible areas of the body, like the nose and the ear. Joints with cartilage include the rib cage, the elbow, and, in the legs, the knees and ankles. Cartilage is hard, but not so rigid as bone matter. Instead, it is somewhat flexible, albeit less so than the much less dense muscle tissue. Thus cartilage can play a structural function in certain areas, like the nose, but cannot perform this function to the same extent as dense bones do. Cartilage is made up of a special type of cell called the chondrocyte, as well as two materials produced by the chondrocytes, collagen fibers and elastic fibers. There are different types of cartilage, characterized by the differing ratios of fibers contained within them. In addition, cartilage is the only connective tissue in the human body which is not exposed to the blood circulation via its own network of arteries or veins. Instead, blood and nutrients diffuse through the cartilage to the extent that they are pushed through the material by movement and pumping action. This makes cartilage the slowest tissue to grow and, when damaged, the slowest to repair itself.…

    • 511 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Molecular Genetics

    • 9782 Words
    • 40 Pages

    Use RESTRICTED to schools where students have purchased this manual Molecular Genetics IB SL IB HL IB Options AP Biology Complete nos: Complete nos: Complete nos: Complete nos: 1, 3-4, 7, 9(a), 11, 13(a)-(d),14-15, 20-22 Extension: 2, 12 1-26, 28-29, 3132, 34 Extension: 27, 30, 33 Option D: 30 1-34 Some numbers as extension as appropriate L earning Objectives 1.…

    • 9782 Words
    • 40 Pages
    Better Essays
  • Powerful Essays

    Collagen Analysis

    • 11261 Words
    • 46 Pages

    Collagen-based medical products are becoming more prevalent, especially in the area of soft tissue augmentation. The use of collagen in surgery dates back to the late 1800s, with the use of catgut sutures, human cadaveric skin, and fascia. More recently, collagen has been used in hemostatic sponges, dermal equivalents, injectables for soft tissue augmentation, as a matrix for cell-based products and as a vehicle for drug delivery. It is because of the versatility of collagen in medical applications that specific characterizations should be performed as a way to compare materials. 1. Scope 1.1 This guide for characterizing collagen-containing biomaterials is intended to provide characteristics, properties, and test methods for use by producers, manufacturers, and researchers to more clearly identify the specific collagen materials used. With greater than 20 types of collagen and the different properties of each, a single document would be cumbersome. This guide will focus on the characterization of Type I collagen, which is the most abundant collagen in mammals, especially in skin and bone. Collagen isolated from these sources may contain other types of collagen, for example, Type III and Type V. This guide does not provide specific parameters for any collagen product or mix of products or the acceptability of those products for the intended…

    • 11261 Words
    • 46 Pages
    Powerful Essays
  • Powerful Essays

    References: 1. Lanza RP, Langer R, Vacanti JP. Principles of tissue engineering. San Diego: Academic Press, 2000.…

    • 1656 Words
    • 7 Pages
    Powerful Essays
  • Satisfactory Essays

    No, I would not have my baby genetically altered. Even though genetic altering can prevent diseases and get rid of them; however humanity would be vastly different. If genetic altering was allowed then no one)would have diseases anymore or reduced there would be no point for professions such as doctors, nurses and all these diseases can be cured with one button.. Those professions would be left with unemployment which can cause another depression as people would be left without work or have to result to find another job. I would not have a genetically altered child as it would ruin the surprise of having a baby and that excitement; When your baby is genetically altered you already know what you are expecting there nothing left to be a…

    • 391 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The Associated Press. “US Regulators Approve 2nd Gene Therapy for Blood Cancer.” New York Times. October 18th.…

    • 545 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Ulrich Beck

    • 11742 Words
    • 47 Pages

    © 2002 BSA Publications Ltd.. All rights reserved. Not for commercial use or unauthorized distribution.…

    • 11742 Words
    • 47 Pages
    Better Essays
  • Powerful Essays

    Translation occurs in the cytoplasm, where the ribosomes are located. Ribosomes are made of a small and large subunit that surround the mRNA. In translation, messenger RNA (mRNA) is decoded to produce a specific polypeptide according to the rules specified by the trinucleotide genetic code. This uses an mRNA sequence as a template to guide the synthesis of a chain of amino acids that form a protein. In activation, the correct amino acid (AA) is joined to the correct transfer RNA (tRNA). While this is not, in the technical sense, a step in translation, it is…

    • 1157 Words
    • 5 Pages
    Powerful Essays
  • Good Essays

    Gene Expression

    • 385 Words
    • 2 Pages

    By definition of dictionary.com gene is defined as the basic physical unit of heredity. a gene is a linear sequence of nucleotides that makes part of a segment called DNA. Deoxyribonucleic acid (DNA) is a nucleic acid that contains genetic codes in the development and functioning of all known living organisms. DNA provides a a linear sequence of nucleotides along a segment of DNA that provides very important codes that make up humans for who and what they are. The process of gene expression is a process that is continuously regulated by the cells nucleus in the regulation of proteins. However, this long coding process has to start somewhere. As I said earlier this function is carried out by a cells nucleus where membranes regulate the function of what enter and leaves the cells through a wide range of mechanisms. On the outside of the membrane, certain receptors are triggered to certain proteins inside the cells cytoplasm. A certain receptor is made that enters the cells nucleus reacting with the DNA, in desire for the expressed gene. Expression is complex process upon which there are many steps which undergo. One is transcription. This is where a copy of one side of genetic information is made to be stored in DNA. Upon starting transcription, proteins are made to read the DNA called rRNA. A second process is involved called splicing. This is where unnecessary parts of RNA are made to create the gene the protein has sent out to make. After all necessary changes have been made to RNA, mRNA is decoded by the ribosome to produce a specific amino acid chains, or polypeptide, that will later fold into an active protein. This sets up the last set of what it takes to make the necessary protein. Posttraslational modification is the chemical modification of a protein after translation synthesis and is the final result of the process gene expression, which leads to the expression of…

    • 385 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Gene Doping

    • 917 Words
    • 4 Pages

    Gene Doping is a different type of gene therapy that has caused a lot of controversy in the past 6-7 years due to the capability of what this method of doping could do. Gene doping therapy was started at Harvard in 1999 and was specifically used to get a substantial rise in the performance of athletes. This is done by genetically modifying cells to enhancing athletic performance. Gene therapy is done by using genes to help treat or stop diseases. This is dangerous because this can have effects such as replacing a mutated gene that creates disease with a healthy gene. Recently there has been genes found that affect the skeletal muscle size and metabolism which gives athletes the potential to be abused for gain in performance.…

    • 917 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Molecular Genetics

    • 886 Words
    • 4 Pages

    Nucleotides consist of three parts --- a pentose sugar, a nitrogen-containing base, and a phosphate group. A pentose sugar is a five-sided sugar. Deoxyribose has a hydrogen atom attached to its #2 carbon atom (designated 2'), and ribose has a hydroxyl group atom there. Deoxyribose-containing nucleotides are the monomers of DNA…

    • 886 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Gene Doping

    • 476 Words
    • 2 Pages

    Genetic manipulation has produced some potential advantages to be able to alter the cells in animal models of human diseases, which may make disease as a thing of the past and help with the development of better pharmaceutical products in order to extend the human life spans, however, there are still major technological obstacles that require further research to ensure the methods and effects of genetic manipulation. The gene therapy products may not only be beneficial to human diseases, but also to athletes in sports. Some potential targets for gene doping include the induction of muscle hypertrophy, increasing oxygen delivery, and the induction of angiogenesis. Some of them may be undetectable by using current tests. Therefore, in order to prevent athletes from benefiting from novel treatments for diseases, it is important to improve the technology of gene doping and the methods of detection.…

    • 476 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Gene Therapy

    • 270 Words
    • 2 Pages

    The virus “infects” the target area with the healthy gene and so the cells can produce functioning proteins again.…

    • 270 Words
    • 2 Pages
    Good Essays