Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2
<p>Abstract</p> <p>Background</p> <p>Experimental clinical stem cell therapy has been used for more than a decade to alleviate the adverse aftermath of acute myocardial infarction (aMI). The post-infarcted myocardial microenvironment is characterized by cardiomyocyte de...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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BMC
2013-02-01
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| Series: | Journal of Translational Medicine |
| Subjects: | |
| Online Access: | http://www.translational-medicine.com/content/11/1/39 |
| _version_ | 1818155501906558976 |
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| author | Przybyt Ewa Krenning Guido Brinker Marja GL Harmsen Martin C |
| author_facet | Przybyt Ewa Krenning Guido Brinker Marja GL Harmsen Martin C |
| author_sort | Przybyt Ewa |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Experimental clinical stem cell therapy has been used for more than a decade to alleviate the adverse aftermath of acute myocardial infarction (aMI). The post-infarcted myocardial microenvironment is characterized by cardiomyocyte death, caused by ischemia and inflammation. These conditions may negatively affect administered stem cells. As postnatal cardiomyocytes have a poor proliferation rate, while induction of proliferation seems even more rare. Thus stimulation of their proliferation rate is essential after aMI. In metaplastic disease, the pro-inflammatory cytokine interleukin-6 (IL-6) has been identified as potent mediators of the proliferation rate. We hypothesized that IL-6 could augment the proliferation rate of (slow-)dividing cardiomyocytes.</p> <p>Methods</p> <p>To mimic the behavior of therapeutic cells in the post-infarct cardiac microenvironment, human Adipose Derived Stromal Cells (ADSC) were cultured under hypoxic (2% O<sub>2</sub>) and pro-inflammatory conditions (IL-1β) for 24h. Serum-free conditioned medium from ADSC primed with hypoxia and/or IL-1β was added to rat neonatal cardiomyocytes and adult cardiomyocytes (HL-1) to assess paracrine-driven changes in cardiomyocyte proliferation rate and induction of myogenic signaling pathways.</p> <p>Results</p> <p>We demonstrate that ADSC enhance the proliferation rate of rat neonatal cardiomyocytes and adult HL-1 cardiomyocytes in a paracrine fashion. ADSC under hypoxia and inflammation <it>in vitro</it> had increased the interleukin-6 (IL-6) gene and protein expression. Similar to conditioned medium of ADSC, treatment of rat neonatal cardiomyocytes and HL-1 with recombinant IL-6 alone also stimulated their proliferation rate. This was corroborated by a strong decrease of cardiomyocyte proliferation after addition of IL-6 neutralizing antibody to conditioned medium of ADSC. The stimulatory effect of ADSC conditioned media or IL-6 was accomplished through activation of both Janus Kinase-Signal Transducer and Activator of Transcription (JAK/STAT) and Mitogen-Activated Protein (MAP) kinases (MAPK) mitogenic signaling pathways.</p> <p>Conclusion</p> <p>ADSC are promising therapeutic cells for cardiac stem cell therapy. The inflammatory and hypoxic host post-MI microenvironment enhances the regenerative potential of ADSC to promote the proliferation rate of cardiomyocytes. This was achieved in paracrine manner, which warrants the development of ADSC conditioned medium as an “of-the-shelf” product for treatment of post-myocardial infarction complications.</p> |
| first_indexed | 2024-12-11T14:43:25Z |
| format | Article |
| id | doaj.art-ee0acf77dd6649cba999d106d02e8c17 |
| institution | Directory Open Access Journal |
| issn | 1479-5876 |
| language | English |
| last_indexed | 2024-12-11T14:43:25Z |
| publishDate | 2013-02-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Translational Medicine |
| spelling | doaj.art-ee0acf77dd6649cba999d106d02e8c172022-12-22T01:01:49ZengBMCJournal of Translational Medicine1479-58762013-02-011113910.1186/1479-5876-11-39Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2Przybyt EwaKrenning GuidoBrinker Marja GLHarmsen Martin C<p>Abstract</p> <p>Background</p> <p>Experimental clinical stem cell therapy has been used for more than a decade to alleviate the adverse aftermath of acute myocardial infarction (aMI). The post-infarcted myocardial microenvironment is characterized by cardiomyocyte death, caused by ischemia and inflammation. These conditions may negatively affect administered stem cells. As postnatal cardiomyocytes have a poor proliferation rate, while induction of proliferation seems even more rare. Thus stimulation of their proliferation rate is essential after aMI. In metaplastic disease, the pro-inflammatory cytokine interleukin-6 (IL-6) has been identified as potent mediators of the proliferation rate. We hypothesized that IL-6 could augment the proliferation rate of (slow-)dividing cardiomyocytes.</p> <p>Methods</p> <p>To mimic the behavior of therapeutic cells in the post-infarct cardiac microenvironment, human Adipose Derived Stromal Cells (ADSC) were cultured under hypoxic (2% O<sub>2</sub>) and pro-inflammatory conditions (IL-1β) for 24h. Serum-free conditioned medium from ADSC primed with hypoxia and/or IL-1β was added to rat neonatal cardiomyocytes and adult cardiomyocytes (HL-1) to assess paracrine-driven changes in cardiomyocyte proliferation rate and induction of myogenic signaling pathways.</p> <p>Results</p> <p>We demonstrate that ADSC enhance the proliferation rate of rat neonatal cardiomyocytes and adult HL-1 cardiomyocytes in a paracrine fashion. ADSC under hypoxia and inflammation <it>in vitro</it> had increased the interleukin-6 (IL-6) gene and protein expression. Similar to conditioned medium of ADSC, treatment of rat neonatal cardiomyocytes and HL-1 with recombinant IL-6 alone also stimulated their proliferation rate. This was corroborated by a strong decrease of cardiomyocyte proliferation after addition of IL-6 neutralizing antibody to conditioned medium of ADSC. The stimulatory effect of ADSC conditioned media or IL-6 was accomplished through activation of both Janus Kinase-Signal Transducer and Activator of Transcription (JAK/STAT) and Mitogen-Activated Protein (MAP) kinases (MAPK) mitogenic signaling pathways.</p> <p>Conclusion</p> <p>ADSC are promising therapeutic cells for cardiac stem cell therapy. The inflammatory and hypoxic host post-MI microenvironment enhances the regenerative potential of ADSC to promote the proliferation rate of cardiomyocytes. This was achieved in paracrine manner, which warrants the development of ADSC conditioned medium as an “of-the-shelf” product for treatment of post-myocardial infarction complications.</p>http://www.translational-medicine.com/content/11/1/39Myocardial infarctionHypoxiaInflammationADSCInterleukin-6Cardiomyocyte ProliferationSTAT3Erk1/2 |
| spellingShingle | Przybyt Ewa Krenning Guido Brinker Marja GL Harmsen Martin C Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 Journal of Translational Medicine Myocardial infarction Hypoxia Inflammation ADSC Interleukin-6 Cardiomyocyte Proliferation STAT3 Erk1/2 |
| title | Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 |
| title_full | Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 |
| title_fullStr | Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 |
| title_full_unstemmed | Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 |
| title_short | Adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate <it>in vitro</it> through STAT3 and Erk1/2 |
| title_sort | adipose stromal cells primed with hypoxia and inflammation enhance cardiomyocyte proliferation rate it in vitro it through stat3 and erk1 2 |
| topic | Myocardial infarction Hypoxia Inflammation ADSC Interleukin-6 Cardiomyocyte Proliferation STAT3 Erk1/2 |
| url | http://www.translational-medicine.com/content/11/1/39 |
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