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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Current Stem Cell Research &amp; Therapy</journal-id><journal-title-group><journal-title xml:lang="en">Current Stem Cell Research &amp; Therapy</journal-title><trans-title-group xml:lang="ru"><trans-title>Current Stem Cell Research &amp; Therapy</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1574-888X</issn><issn publication-format="electronic">2212-3946</issn><publisher><publisher-name xml:lang="en">Bentham Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">645599</article-id><article-id pub-id-type="doi">10.2174/011574888X277276231215110316</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>Medicine</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bioinformatics-based Study on the Effects of Umbilical Cord Mesenchymal Stem Cells on the Aging Retina</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Shi</surname><given-names>Ya-Hui</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Li</surname><given-names>Jun-Qi</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Min-Xu</surname><given-names></given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Wang</surname><given-names>Yu-Ying</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Wang</surname><given-names>Ting-Hua</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Zuo</surname><given-names>Zhong-Fu</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Liu</surname><given-names>Xue-Zheng</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff id="aff1"><institution>Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University</institution></aff><pub-date date-type="pub" iso-8601-date="2024-11-01" publication-format="electronic"><day>01</day><month>11</month><year>2024</year></pub-date><volume>19</volume><issue>11</issue><issue-title xml:lang="ru"/><fpage>1497</fpage><lpage>1513</lpage><history><date date-type="received" iso-8601-date="2025-01-11"><day>11</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Bentham Science Publishers</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Bentham Science Publishers</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/1574-888X/article/view/645599">https://journals.eco-vector.com/1574-888X/article/view/645599</self-uri><abstract xml:lang="en"><p id="idm46466589628000">Background:Retinal aging is one of the common public health problems caused by population aging and has become an important cause of acquired vision loss in adults. The aim of this study was to determine the role of human umbilical cord mesenchymal stem cells (hUCMSCs) in delaying retinal ganglion cell (RGC) aging and part of the network of molecular mechanisms involved.</p><p id="idm46466589632000">Methods:A retinal ganglion cell senescence model was established in vitro and treated with UCMSC. Successful establishment of the senescence system was demonstrated using β- galactosidase staining. The ameliorative effect of MSC on senescence was demonstrated using CCK8 cell viability and Annexin V-PI apoptosis staining. The relevant targets of RGC, MSC, and senescence were mainly obtained by searching the GeneCards database. The protein interaction network among the relevant targets was constructed using the String database and Cytoscape, and 10 key target genes were calculated based on the MCC algorithm, based on which Gene ontologies (GO) enrichment and the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment were performed. Changes in relevant target genes were detected using real-time fluorescence quantitative PCR and the mechanism of action of UCMSC was determined by RNA interference.</p><p id="idm46466589635968">Results:β-galactosidase staining showed that UCMSC significantly reduced the positive results of RGC. The retinal aging process was alleviated. The bioinformatics screen yielded 201 shared genes. 10 key genes were selected by the MCC algorithm, including vascular endothelial growth factor A (VEGFA), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), albumin (ALB), interleukin- 6 (IL6), tumor necrosis factor (TNF), tumor protein P53 (TP53), insulin (INS), matrix metalloproteinase 9 (MMP9), epidermal growth factor (EGF), interleukin-1β (IL1B), and enrichment to related transferase activity and kinase activity regulated biological processes involved in oxidative stress and inflammation related pathways. In addition, PCR results showed that all the above molecules were altered in expression after UCMSC involvement.</p><p id="idm46466589641024">Conclusion:This experiment demonstrated the role of UCMSC in delaying retinal ganglion cell senescence and further elucidated that UCMSC may be associated with the activation of VEGFA, TP53, ALB, GAPDH, IL6, IL1B, MMP9 genes and the inhibition of INS, EGF, and TNF in delaying retinal senescence.</p></abstract><kwd-group xml:lang="en"><kwd>Retinal ganglion cells</kwd><kwd>aging</kwd><kwd>umbilical cord mesenchymal stem cells</kwd><kwd>bioinformatics analysis</kwd><kwd>apoptosis</kwd><kwd>oxidative stress.</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Harwerth, R.S.; Wheat, J.L. Modeling the effects of aging on retinal ganglion cell density and nerve fiber layer thickness. Graefes Arch. Clin. Exp. Ophthalmol., 2008, 246(2), 305-314. doi: 10.1007/s00417-007-0691-5 PMID: 17934750</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Tatham, A.J.; Medeiros, F.A. Detecting structural progression in glaucoma with optical coherence tomography. Ophthalmology, 2017, 124(12), S57-S65. doi: 10.1016/j.ophtha.2017.07.015 PMID: 29157363</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Chen, M.; Luo, C.; Zhao, J.; Devarajan, G.; Xu, H. Immune regulation in the aging retina. Prog. Retin. Eye Res., 2019, 69, 159-172. doi: 10.1016/j.preteyeres.2018.10.003 PMID: 30352305</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Zhao, L.; Feng, Z.; Zou, X.; Cao, K.; Xu, J.; Liu, J. Aging leads to elevation of O-GlcNAcylation and disruption of mitochondrial homeostasis in retina. Oxid. Med. Cell. Longev., 2014, 2014, 1-11. doi: 10.1155/2014/425705 PMID: 24987494</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Nag, T.C. Pathogenic mechanisms contributing to the vulnerability of aging human photoreceptor cells. Eye, 2021, 35(11), 2917-2929. doi: 10.1038/s41433-021-01602-1 PMID: 34079093</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Fu, X.; Liu, G.; Halim, A.; Ju, Y.; Luo, Q.; Song, A.G. Mesenchymal stem cell migration and tissue repair. Cells, 2019, 8(8), 784. doi: 10.3390/cells8080784 PMID: 31357692</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Keshtkar, S.; Azarpira, N.; Ghahremani, M.H. Mesenchymal stem cell-derived extracellular vesicles: novel frontiers in regenerative medicine. Stem Cell Res. Ther., 2018, 9(1), 63. doi: 10.1186/s13287-018-0791-7 PMID: 29523213</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Ding, D.C.; Chang, Y.H.; Shyu, W.C.; Lin, S.Z. Human umbilical cord mesenchymal stem cells: A new era for stem cell therapy. Cell Transplant., 2015, 24(3), 339-347. doi: 10.3727/096368915X686841 PMID: 25622293</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Zappa Villar, M.F.; Lehmann, M.; García, M.G. Mesenchymal stem cell therapy improves spatial memory and hippocampal structure in aging rats. Behav. Brain Res., 2019, 374, 111887. doi: 10.1016/j.bbr.2019.04.001 PMID: 30951751</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Yan, Q.; Xiao, Q.; Ge, J. Bioinformatics-based research on key genes and pathways of intervertebral disc degeneration. Cartilage, 2021, 13, 582S-591S. doi: 10.1177/1947603520973247 PMID: 33233925</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Berglund, A.; Putney, R.M.; Hamaidi, I.; Kim, S. Epigenetic dysregulation of immune-related pathways in cancer: Bioinformatics tools and visualization. Exp. Mol. Med., 2021, 53(5), 761-771. doi: 10.1038/s12276-021-00612-z PMID: 33963293</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Liu, K.; Zhang, Y.; Martin, C.; Ma, X.; Shen, B. Translational bioinformatics for human reproductive biology research: examples, opportunities and challenges for a future reproductive medicine. Int. J. Mol. Sci., 2022, 24(1), 4. doi: 10.3390/ijms24010004 PMID: 36613446</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Dan, Q.Q.; Chen, L. shi LL, Zhou X, Wang TH, Liu H. Urine-derived mesenchymal stem cells-derived exosomes enhances survival and proliferation of aging retinal ganglion cells. BMC Mol. Cell Biol., 2023, 24(1), 8. doi: 10.1186/s12860-023-00467-4 PMID: 36879194</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Liu, X.; Chen, F.; Chen, Y. Paracrine effects of intraocularly implanted cells on degenerating retinas in mice. Stem Cell Res. Ther., 2020, 11(1), 142. doi: 10.1186/s13287-020-01651-5 PMID: 32234075</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Shen, J.; Tower, J. Effects of light on aging and longevity. Ageing Res. Rev., 2019, 53, 100913. doi: 10.1016/j.arr.2019.100913 PMID: 31154014</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Cano, M.; Datta, S.; Wang, L. Nrf2 deficiency decreases NADPH from impaired IDH shuttle and pentose phosphate pathway in retinal pigmented epithelial cells to magnify oxidative stress‐induced mitochondrial dysfunction. Aging Cell, 2021, 20(8), e13444. doi: 10.1111/acel.13444 PMID: 34313391</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Xu, N.; Chen, Y.; Dean, K.C. Sphere-induced rejuvenation of swine and human müller glia is primarily caused by telomere elongation. Stem Cells, 2017, 35(6), 1579-1591. doi: 10.1002/stem.2585 PMID: 28152565</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Sui, B.D.; Hu, C.H.; Zheng, C.X.; Jin, Y. Microenvironmental views on mesenchymal stem cell differentiation in aging. J. Dent. Res., 2016, 95(12), 1333-1340. doi: 10.1177/0022034516653589 PMID: 27302881</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Denu, R.A. SIRT3 enhances mesenchymal stem cell longevity and differentiation. Oxid. Med. Cell. Longev., 2017, 2017, 1-11. doi: 10.1155/2017/5841716 PMID: 28717408</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Zheng, C.X.; Sui, B.D.; Qiu, X.Y.; Hu, C.H.; Jin, Y. Mitochondrial regulation of stem cells in bone homeostasis. Trends Mol. Med., 2020, 26(1), 89-104. doi: 10.1016/j.molmed.2019.04.008 PMID: 31126872</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Fafián-Labora, J.; Morente-López, M.; Sánchez-Dopico, M.J. Influence of mesenchymal stem cell-derived extracellular vesicles in vitro and their role in ageing. Stem Cell Res. Ther., 2020, 11(1), 13. doi: 10.1186/s13287-019-1534-0 PMID: 31900239</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Zhou, X.; Wang, L.; Zhang, Z. Fluorometholone inhibits high glucose-induced cellular senescence in human retinal endothelial cells. Hum. Exp. Toxicol., 2022, 41. doi: 10.1177/09603271221076107 PMID: 35264022</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>He, Y.; Leung, K.W.; Ren, Y.; Pei, J.; Ge, J.; Tombran-Tink, J. PEDF improves mitochondrial function in RPE cells during oxidative stress. Invest. Ophthalmol. Vis. Sci., 2014, 55(10), 6742-6755. doi: 10.1167/iovs.14-14696 PMID: 25212780</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Fernandes, A.F.; Guo, W.; Zhang, X. Proteasome-dependent regulation of signal transduction in retinal pigment epithelial cells. Exp. Eye Res., 2006, 83(6), 1472-1481. doi: 10.1016/j.exer.2006.07.024 PMID: 17027001</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Chen, Q.; Tang, L.; Zhang, Y. STING up-regulates VEGF expression in oxidative stress-induced senescence of retinal pigment epithelium via NF-κB/HIF-1α pathway. Life Sci., 2022, 293, 120089. doi: 10.1016/j.lfs.2021.120089 PMID: 35007563</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Arroba, AI; Rosa, LR; Murillo-Cuesta, S Autophagy resolves early retinal inflammation in Igf1 -deficient mice. Dis Model Mech, 2016, 9(9), dmm.026344. doi: 10.1242/dmm.026344 PMID: 27483352</mixed-citation></ref><ref id="B27"><label>27.</label><mixed-citation>Lee, H.; Hwang-Bo, H.; Ji, S.Y. Diesel particulate matter2.5 promotes epithelial-mesenchymal transition of human retinal pigment epithelial cells via generation of reactive oxygen species. Environ. Pollut., 2020, 262, 114301.</mixed-citation></ref><ref id="B28"><label>28.</label><mixed-citation>Campbell, D.S.; Okamoto, H. Local caspase activation interacts with Slit-Robo signaling to restrict axonal arborization. J. Cell Biol., 2013, 203(4), 657-672. doi: 10.1083/jcb.201303072 PMID: 24385488</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Sasaki, F.; Koga, T.; Ohba, M. Leukotriene B4 promotes neovascularization and macrophage recruitment in murine wet-type AMD models. JCI Insight, 2018, 3(18), 96902-2.</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Kandarakis, S.A.; Piperi, C.; Moschonas, D.P.; Korkolopoulou, P.; Papalois, A.; Papavassiliou, A.G. Dietary glycotoxins induce RAGE and VEGF up-regulation in the retina of normal rats. Exp. Eye Res., 2015, 137, 1-10. doi: 10.1016/j.exer.2015.05.017 PMID: 26026876</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Smith, R.O.; Ninchoji, T.; Gordon, E. Vascular permeability in retinopathy is regulated by VEGFR2 Y949 signaling to VE-cadherin. eLife, 2020, 9, e54056. doi: 10.7554/eLife.54056 PMID: 32312382</mixed-citation></ref><ref id="B32"><label>32.</label><mixed-citation>Marneros, A.G. Increased VEGF ‐A promotes multiple distinct aging diseases of the eye through shared pathomechanisms. EMBO Mol. Med., 2016, 8(3), 208-231. doi: 10.15252/emmm.201505613 PMID: 26912740</mixed-citation></ref><ref id="B33"><label>33.</label><mixed-citation>Hao, Y.; Zhou, Q.; Ma, J.; Zhao, Y.; Wang, S. miR-146a is upregulated during retinal pigment epithelium (RPE)/choroid aging in mice and represses IL-6 and VEGF-A expression in RPE cells. J. Clin. Exp. Ophthalmol., 2016, 7(3), 562. doi: 10.4172/2155-9570.1000562 PMID: 27917303</mixed-citation></ref><ref id="B34"><label>34.</label><mixed-citation>Liao, W.L.; Turko, I.V. Accumulation of large protein fragments in prematurely senescent ARPE-19 cells. Invest. Ophthalmol. Vis. Sci., 2009, 50(10), 4992-4997. doi: 10.1167/iovs.09-3671 PMID: 19458325</mixed-citation></ref><ref id="B35"><label>35.</label><mixed-citation>Rose, K.; Schröer, U.; Volk, G.F. Axonal regeneration in the organotypically cultured monkey retina: biological aspects, dependence on substrates and age-related proteomic profiling. Restor. Neurol. Neurosci., 2008, 26(4-5), 249-266. J. PMID: 18997304</mixed-citation></ref><ref id="B36"><label>36.</label><mixed-citation>Peng, H.; Han, W.; Ma, B. Autophagy and senescence of rat retinal precursor cells under high glucose. Front. Endocrinol., 2023, 13, 1047642. doi: 10.3389/fendo.2022.1047642 PMID: 36686430</mixed-citation></ref><ref id="B37"><label>37.</label><mixed-citation>Itakura, T.; Webster, A.; Chintala, S.K. GPR158 in the visual system: Homeostatic role in regulation of intraocular pressure. J. Ocul. Pharmacol. Ther., 2019, 35(4), 203-215. doi: 10.1089/jop.2018.0135 PMID: 30855200</mixed-citation></ref><ref id="B38"><label>38.</label><mixed-citation>Marazita, M.C.; Dugour, A.; Marquioni-Ramella, M.D.; Figueroa, J.M.; Suburo, A.M. Oxidative stress-induced premature senescence dysregulates VEGF and CFH expression in retinal pigment epithelial cells: Implications for Age-related Macular Degeneration. Redox Biol., 2016, 7, 78-87. doi: 10.1016/j.redox.2015.11.011 PMID: 26654980</mixed-citation></ref><ref id="B39"><label>39.</label><mixed-citation>Chucair-Elliott, A.J.; Ocañas, S.R.; Pham, K. Translatomic response of retinal Müller glia to acute and chronic stress. Neurobiol. Dis., 2022, 175, 105931. doi: 10.1016/j.nbd.2022.105931 PMID: 36423879</mixed-citation></ref><ref id="B40"><label>40.</label><mixed-citation>Sims, S.M.; Holmgren, L.; Cathcart, H.M.; Sappington, R.M. Spatial regulation of interleukin-6 signaling in response to neurodegenerative stressors in the retina. Am. J. Neurodegener. Dis., 2012, 1(2), 168-179. PMID: 23024928</mixed-citation></ref><ref id="B41"><label>41.</label><mixed-citation>Mangold, C.A.; Masser, D.R.; Stanford, D.R. CNS-wide sexually dimorphic induction of the major histocompatibility complex 1 pathway with aging. J. Gerontol. A Biol. Sci. Med. Sci., 2017, 72(1), 16-29. doi: 10.1093/gerona/glv232 PMID: 26786204</mixed-citation></ref><ref id="B42"><label>42.</label><mixed-citation>Du, X.; Byrne, E.M.; Chen, M.; Xu, H. Minocycline inhibits microglial activation and improves visual function in a chronic model of age-related retinal degeneration. Biomedicines, 2022, 10(12), 3222. doi: 10.3390/biomedicines10123222 PMID: 36551980</mixed-citation></ref><ref id="B43"><label>43.</label><mixed-citation>Wang, J.; Feng, Y.; Han, P. Photosensitization of A2E triggers telomere dysfunction and accelerates retinal pigment epithelium senescence. Cell Death Dis., 2018, 9(2), 178. doi: 10.1038/s41419-017-0200-7 PMID: 29415988</mixed-citation></ref><ref id="B44"><label>44.</label><mixed-citation>Eriksdotter, M.; Navarro-Oviedo, M.; Mitra, S. Cerebrospinal fluid from alzheimer patients affects cell-mediated nerve growth factor production and cell survival in vitro. Exp. Cell Res., 2018, 371(1), 175-184. doi: 10.1016/j.yexcr.2018.08.007 PMID: 30092220</mixed-citation></ref><ref id="B45"><label>45.</label><mixed-citation>Cao, L.; Wang, H.; Wang, F.; Xu, D.; Liu, F.; Liu, C. Aβ-induced senescent retinal pigment epithelial cells create a proinflammatory microenvironment in AMD. Invest. Ophthalmol. Vis. Sci., 2013, 54(5), 3738-3750. doi: 10.1167/iovs.13-11612 PMID: 23557734</mixed-citation></ref><ref id="B46"><label>46.</label><mixed-citation>López-Luppo, M.; Nacher, V.; Ramos, D. Blood vessel basement membrane alterations in human retinal microaneurysms during aging. Invest. Ophthalmol. Vis. Sci., 2017, 58(2), 1116-1131. doi: 10.1167/iovs.16-19998 PMID: 28196225</mixed-citation></ref><ref id="B47"><label>47.</label><mixed-citation>Manabe, S.; Gu, Z.; Lipton, S.A. Activation of matrix metalloproteinase-9 via neuronal nitric oxide synthase contributes to NMDA-induced retinal ganglion cell death. Invest. Ophthalmol. Vis. Sci., 2005, 46(12), 4747-4753. doi: 10.1167/iovs.05-0128 PMID: 16303975</mixed-citation></ref><ref id="B48"><label>48.</label><mixed-citation>Li, L.; Huang, Y.; Gao, Y. EGF/EGFR upregulates and cooperates with Netrin-4 to protect glioblastoma cells from DNA damage-induced senescence. BMC Cancer, 2018, 18(1), 1215. doi: 10.1186/s12885-018-5056-4 PMID: 30514230</mixed-citation></ref><ref id="B49"><label>49.</label><mixed-citation>Li, Y.; Zhao, L.; Qi, W. Uric acid, as a double-edged sword, affects the activity of epidermal growth factor (EGF) on human umbilical vein endothelial cells by regulating aging process. Bioengineered, 2022, 13(2), 3877-3895. doi: 10.1080/21655979.2022.2027172 PMID: 35152831</mixed-citation></ref><ref id="B50"><label>50.</label><mixed-citation>Salminen, A.; Kaarniranta, K.; Kauppinen, A. Insulin/IGF-1 signaling promotes immunosuppression via the STAT3 pathway: Impact on the aging process and age-related diseases J/OL. Inflamma Res Official J Europ Hista Res Soc, 2021, 70(10-12), 1043-1061.</mixed-citation></ref><ref id="B51"><label>51.</label><mixed-citation>Tabibzadeh, S. Signaling pathways and effectors of aging. Front. Biosci., 2021, 26(1), 50-96. doi: 10.2741/4889 PMID: 33049665</mixed-citation></ref><ref id="B52"><label>52.</label><mixed-citation>Dowery, R.; Benhamou, D.; Benchetrit, E. Peripheral B cells repress B-cell regeneration in aging through a TNF-α/IGFBP-1/IGF-1 immune-endocrine axis. Blood, 2021, 138(19), 1817-1829. doi: 10.1182/blood.2021012428 PMID: 34297797</mixed-citation></ref><ref id="B53"><label>53.</label><mixed-citation>Huang, Y.; Xu, Z.; Xiong, S. Dual extra-retinal origins of microglia in the model of retinal microglia repopulation. Cell Discov., 2018, 4(1), 9. doi: 10.1038/s41421-018-0011-8 PMID: 29507754</mixed-citation></ref></ref-list></back></article>
