alexa Erythropoiesis: from molecular pathways to system properties.
Engineering

Engineering

International Journal of Sensor Networks and Data Communications

Author(s): Koulnis M, Porpiglia E, Hidalgo D, Socolovsky M

Abstract Share this page

Abstract Erythropoiesis is regulated through a long-range negative feedback loop, whereby tissue hypoxia stimulates erythropoietin (Epo) secretion, which promotes an increase in erythropoietic rate. However, this long-range feedback loop, by itself, cannot account for the observed system properties of erythropoiesis, namely, a wide dynamic range, stability in the face of random perturbations, and a rapid stress response. Here, we show that three Epo-regulated erythroblast survival pathways each give rise to distinct system properties. The induction of Bcl-xL by signal transducer and activator of transcription 5 (Stat5) is responsive to the rate of change in Epo levels, rather than to its absolute level, and is therefore maximally but transiently activated in acute stress. By contrast, Epo-mediated suppression of the pro-survival Fas and Bim pathways is proportional to the levels of stress/Epo and persists throughout chronic stress. Together, these elements operate in a manner reminiscent of a "proportional-integral-derivative (PID)" feedback controller frequently found in engineering applications. A short-range negative autoregulatory loop within the early erythroblast compartment, operated by Fas/FasL, filters out random noise and controls a reserve pool of early erythroblasts that is poised to accelerate the response to acute stress. Both these properties have previously been identified as inherent to negative regulatory motifs. Finally, we show that signal transduction by Stat5 combines binary and graded modalities, thereby increasing signaling fidelity over the wide dynamic range of Epo found in health and disease. This article was published in Adv Exp Med Biol and referenced in International Journal of Sensor Networks and Data Communications

Relevant Expert PPTs

Relevant Speaker PPTs

  • Agnes Bonvilain
    Microsensors for instrumented medical tools for their real time monitoring
    PPT Version | PDF Version
  • Francesco Fontana
    Wearable artificial kidney - back to the future: A review
    PPT Version | PDF Version
  • Jonny Carlos da Silva
    Jonny-Carlos-da-Silva-Federal-University-of-Santa-Catarina-Brazil-Design-for-reliability-of-mechatronic-systems-supported-by-knowledge-based-systems-in-design-process-early-phases
    PPT Version | PDF Version
  • Mario Marques da Silva
    MIMO Systems and Applications
    PPT Version | PDF Version
  • Trung-Dinh Han
    Device-To-Device (D2D) Communication in 5G Cellular Networks
    PPT Version | PDF Version
  • Elizabeth Chang
    Advances in Internet of Things and Cyber Physical Systems and its Adoption to Smart Ship
    PPT Version | PDF Version
  • Qilian Xie
    Accompanying mild hypothermia significantly improved the prognosis of septic mice than artificial mild hypothermia
    PPT Version | PDF Version
  • Diane Paskiet
    Qualifi cation of extractables & leachables from container closure systems in drug products- Introduction to the Product Quality Institute (PQRI) recommendations
    PPT Version | PDF Version
  • Merve Sagiroglu
    Merve-Sagıroglu- Erzurum-Technical-University-Turkey- Evaluation-of-Connection-Systems-in-Modular-Constructions
    PPT Version | PDF Version
  • Arshad Islam
    Nanosystems formed by amphiphilic antimony(v) complexes incorporating amphotericin B for the treatment leishmaniasis
    PPT Version | PDF Version
  • Kadir Genc
    Kadir-Genc-Valeo-Automotive-Systems-Industry-Turkey-Development-of-stamping-technology-in-automotive-and-production-speed-calculations
    PPT Version | PDF Version
  • Yosef Yarden
    Classically, the 3’untranslated region (3’UTR) is that region in eukaryotic protein-coding genes from the translation termination codon to the polyA signal. It is transcribed as an integral part of the mRNA encoded by the gene. However, there exists another kind of RNA, which consists of the 3’UTR alone, without all other elements in mRNA such as 5’UTR and coding region. The importance of independent 3’UTR RNA (referred as I3’UTR) was prompted by results of artificially introducing such RNA species into malignant mammalian cells. Since 1991, we found that the middle part of the 3’UTR of the human nuclear factor for interleukin-6 (NF-IL6) or C/EBP gene exerted tumor suppression effect in vivo. Our subsequent studies showed that transfection of C/EBP 3’UTR led to down-regulation of several genes favorable for malignancy and to up-regulation of some genes favorable for phenotypic reversion. Also, it was shown that the sequences near the termini of the C/EBP 3’UTR were important for its tumor suppression activity. Then, the C/EBP 3’UTR was found to directly inhibit the phosphorylation activity of protein kinase CPKC in SMMC-7721, a hepatocarcinoma cell line. Recently, an AU-rich region in the C/EBP 3’UTR was found also to be responsible for its tumor suppression. Recently we have also found evidence that the independent C/EBP 3’UTR RNA is actually exists in human tissues, such as fetal liver and heart, pregnant uterus, senescent fibroblasts etc. Through 1990’s to 2000’s, world scientists found several 3’UTR RNAs that functioned as artificial independent RNAs in cancer cells and resulted in tumor suppression. Interestingly, majority of genes for these RNAs have promoter-like structures in their 3’UTR regions, although the existence of their transcribed products as independent 3’UTR RNAs is still to be confirmed. Our studies indicate that the independent 3’UTR RNA is a novel non-coding RNA species whose function should be the regulation not of the expression of their original mRNA, but of some essential life activities of the cell as a whole.
    PPT Version | PDF Version
  • Veronica La Regina
    Veronica-La-Regina-Italian-Space-Agency-(ASI)-Italy-Systems-engineering-approach-and-space-technology-transfer-The-role-of-international-relations-and-public-policy
    PPT Version | PDF Version
  • Fan-Gang Tseng
    Fan-Gang-Tseng-National-Tsing-Hua-University-Taiwan-Nano-Micro-fluidic-systems-for-circulating-Tumor-Cells-(CTCs)-rapid-detection-and-diagnosis
    PPT Version | PDF Version
  • S M Pérez-Moreno
    Potential valorizations of artificial gypsum generated in the manufacture of titanium dioxide pigments
    PPT Version | PDF Version

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

agrifoodaquavet@omicsonline.com

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

clinical_biochem@omicsonline.com

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

business@omicsonline.com

1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

chemicaleng_chemistry@omicsonline.com

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

environmentalsci@omicsonline.com

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

engineering@omicsonline.com

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

generalsci_healthcare@omicsonline.com

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

genetics_molbio@omicsonline.com

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

immuno_microbio@omicsonline.com

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

omics@omicsonline.com

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

materialsci@omicsonline.com

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

mathematics_physics@omicsonline.com

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

medical@omicsonline.com

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

neuro_psychology@omicsonline.com

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

pharma@omicsonline.com

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

social_politicalsci@omicsonline.com

1-702-714-7001 Extn: 9042

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version