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Prišlin M, Butorac A, Bertoša R, Kunić V, Ljolje I, Kostešić P, Vlahović D, Naletilić Š, Turk N, Brnić D. In vitro aging alters the gene expression and secretome composition of canine adipose-derived mesenchymal stem cells. Front Vet Sci 2024; 11:1387174. [PMID: 38605926 PMCID: PMC11006985 DOI: 10.3389/fvets.2024.1387174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 03/08/2024] [Indexed: 04/13/2024] Open
Abstract
Introduction Canine adipose-derived mesenchymal stem cells (cAD-MSCs) hold therapeutic promise due to their regenerative potential, particularly within their secretome. However, concerns arise regarding the impact of in vitro cultivation necessitated for storing therapeutic doses, prompting this study to comprehensively explore the impact of in vitro aging on gene expression and secretome composition. Methods The study involved collecting abdominal adipose tissue samples from nine healthy female dogs, from which cAD-MSCs were extracted and cultured. Stem cells were validated through trilineage differentiation assays and flow cytometry immunophenotyping. Gene expression profiling using RT-qPCR array, and cAD-MSCs secretome LC-MS/MS analysis, were conducted at passages 3 and 6 to reveal gene expression and protein composition alterations during in vitro culture. Results and Discussion The results demonstrate that the gene expression and secretome composition of cAD-MSCs were impacted by in vitro aging. Among many alterations in gene expression between two passages, two significant downregulations were noted in the MSC-associated PTPRC and IL10 genes. While the majority of proteins and their functional characteristics were shared between passages, the influence of cell aging on secretome composition is highlighted by 10% of proteins being distinctively expressed in each passage, along with 21 significant up- and downregulations. The functional attributes of proteins detected in passage 3 demonstrated a greater inclination towards supporting the regenerative capacity of cAD-MSCs. Moreover, proteins in passage 6 exhibited a noteworthy correlation with the blood coagulation pathway, suggesting an elevated likelihood of coagulation events. To the best of our knowledge, this study presents the first original perspective on the changes in secretome composition that occur when cAD-MSCs age in vitro. Furthermore, it contributes to broadening the currently restricted knowledge base concerning the secretome of cAD-MSCs. In conclusion, our findings show that the regenerative potential of cAD-MSCs, as well as their secretome, may be compromised by in vitro aging. Therefore, our study suggests a preference for earlier passages when considering these cells for therapeutic applications.
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Affiliation(s)
- Marina Prišlin
- Virology Department, Croatian Veterinary Institute, Zagreb, Croatia
| | - Ana Butorac
- Bioanalytical Laboratory II—Proteomics, Bicro Biocentre Ltd., Zagreb, Croatia
| | - Rea Bertoša
- Bioanalytical Laboratory II—Proteomics, Bicro Biocentre Ltd., Zagreb, Croatia
| | - Valentina Kunić
- Virology Department, Croatian Veterinary Institute, Zagreb, Croatia
| | - Ivana Ljolje
- Veterinary Clinic for Small Animals Buba, Zagreb, Croatia
| | - Petar Kostešić
- Surgery, Orthopedics and Ophthalmology Clinic, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
| | - Dunja Vlahović
- Department for Pathological Morphology, Croatian Veterinary Institute, Zagreb, Croatia
| | - Šimun Naletilić
- Department for Pathological Morphology, Croatian Veterinary Institute, Zagreb, Croatia
| | - Nenad Turk
- Department of Microbiology and Infectious Diseases with Clinic, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
| | - Dragan Brnić
- Virology Department, Croatian Veterinary Institute, Zagreb, Croatia
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Khudyakov JI, Allen KN, Crocker DE, Trost NS, Roberts AH, Pirard L, Debier C, Piotrowski ER, Vázquez-Medina JP. Comprehensive molecular and morphological resolution of blubber stratification in a deep-diving, fasting-adapted seal. Front Physiol 2022; 13:1057721. [PMID: 36589428 PMCID: PMC9795062 DOI: 10.3389/fphys.2022.1057721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/28/2022] [Indexed: 12/15/2022] Open
Abstract
Blubber is a modified subcutaneous adipose tissue in marine mammals that provides energy storage, thermoregulation, hydrodynamic locomotion, and buoyancy. Blubber displays vertical stratification by lipid content, fatty acid composition, and vascularization, leading to the assumption that deeper blubber layers are metabolically active, while superficial layers are mainly structural and thermoregulatory. However, few studies have examined functional stratification of marine mammal blubber directly, especially in pinnipeds. We characterized morphological and transcriptional differences across blubber layers in the northern elephant seal, a deep-diving and fasting-adapted phocid. We collected blubber from seals early in their fasting period and divided blubber cores into three similarly sized portions. We hypothesized that the innermost blubber portion would have higher 1) heterogeneity in adipocyte size, 2) microvascular density, and 3) expression of genes associated with metabolism and hormone signaling than outer blubber. We found that adipocyte area and variance increased from outermost (skin-adjacent) to innermost (muscle-adjacent) blubber layers, suggesting that inner blubber has a higher capacity for lipid storage and turnover than outer blubber. Inner blubber had a higher proportion of CD144+ endothelial cells, suggesting higher microvascular density. In contrast, outer blubber had a higher proportion of CD4+ immune cells than inner blubber, suggesting higher capacity for response to tissue injury. Transcriptome analysis identified 61 genes that were differentially expressed between inner and outer blubber layers, many of which have not been studied previously in marine mammals. Based on known functions of these genes in other mammals, we suggest that inner blubber has potentially higher 1) adipogenic capacity, 2) cellular diversity, and 3) metabolic and neuroendocrine signaling activity, while outer blubber may have higher 1) extracellular matrix synthesis activity and 2) responsiveness to pathogens and cell stressors. We further characterized expression of nine genes of interest identified by transcriptomics and two adipokines with higher precision across blubber layers using targeted assays. Our study provides functional insights into stratification of blubber in marine mammals and a molecular key, including CD144, CD4, HMGCS2, GABRG2, HCAR2, and COL1A2, for distinguishing blubber layers for physiological and functional studies in seals.
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Affiliation(s)
- J. I. Khudyakov
- Department of Biological Sciences, University of the Pacific, Stockton, CA, United States,*Correspondence: J. I. Khudyakov,
| | - K. N. Allen
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, United States
| | - D. E. Crocker
- Department of Biology, Sonoma State University, Rohnert Park, CA, United States
| | - N. S. Trost
- Department of Biological Sciences, University of the Pacific, Stockton, CA, United States
| | - A. H. Roberts
- Department of Biological Sciences, University of the Pacific, Stockton, CA, United States
| | - L. Pirard
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, Louvain-la Neuve, Belgium
| | - C. Debier
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, Louvain-la Neuve, Belgium
| | - E. R. Piotrowski
- Department of Biological Sciences, University of the Pacific, Stockton, CA, United States
| | - J. P. Vázquez-Medina
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, United States
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Li Y, Cui ZJ. Photodynamic Activation of the Cholecystokinin 1 Receptor with Tagged Genetically Encoded Protein Photosensitizers: Optimizing the Tagging Patterns. Photochem Photobiol 2022; 98:1215-1228. [PMID: 35211987 DOI: 10.1111/php.13611] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 02/20/2022] [Indexed: 02/05/2023]
Abstract
Cholecystokinin 1 receptor (CCK1R) is activated photodynamically. For this to happen in situ, genetically encoded protein photosensitizers (GEPP) may be tagged to natively expressed CCK1R, but how to best tag GEPP has not been examined. Therefore, GEPP (miniSOG or KillerRed) was tagged to CCK1R and light-driven photodynamic CCK1R activation was monitored by Fura-2 fluorescent calcium imaging, to screen for optimized tagging patterns. Blue light-emitting diode irradiation of CHO-K1 cells expressing miniSOG fused to N- or C-terminus of CCK1R was found to both trigger persistent calcium oscillations-a hallmark of permanent photodynamic CCK1R activation. Photodynamic CCK1R activation was accomplished also with miniSOG fused to N-terminus of CCK1R via linker (GlySerGly)4 or 8 , but not linker (GSG)12 or an internal ribosomal entry site insert. KillerRed fused to N- or C-terminus of CCK1R after white light irradiation resulted in similar activation of in-frame CCK1R. Photodynamic CCK1R activation in miniSOG-CCK1R-CHO-K1 cells was blocked by singlet oxygen (1 O2 ) quencher uric acid or Trolox C, corroborating the role of 1 O2 as the reactive intermediate. It is concluded that photodynamic CCK1R activation can be achieved either with direct GEPP fusion to CCK1R or fusion via a short linker, fusion via long linkers might serve as the internal control.
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Affiliation(s)
- Yuan Li
- Institute of Cell Biology, Beijing Normal University, Beijing, China
| | - Zong Jie Cui
- Institute of Cell Biology, Beijing Normal University, Beijing, China
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Plaza A, Merino B, Ruiz-Gayo M. Cholecystokinin promotes functional expression of the aquaglycerol channel aquaporin 7 in adipocytes. Br J Pharmacol 2022; 179:4092-4106. [PMID: 35366004 DOI: 10.1111/bph.15848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 03/16/2022] [Accepted: 03/20/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Cholecystokinin (CCK) promotes triglyceride storage and adiponectin production in white adipose tissue (WAT), suggesting that CCK modulates WAT homeostasis. Our goal was to investigate the role of CCK in regulating the expression and function of the aquaglycerol channel aquaporin 7 (AQP7), a protein that is pivotal for maintaining adipocyte homeostasis and preserving insulin responsiveness. EXPERIMENTAL APPROACH The effect of the bioactive fragment of CCK, CCK-8, in regulating adipose AQP7 expression and glycerol efflux was assessed in rats as well as in pre-adipocytes. Moreover, the involvement of insulin receptors in the effects of CCK-8 was characterized in pre-adipocytes lacking insulin receptors. KEY RESULTS CCK-8 induced AQP7 gene expression in rat WAT, concomitantly increasing plasma glycerol concentration. In isolated pre-adipocytes, CCK-8 also enhanced both AQP7 expression and glycerol leakage. The effect of CCK-8 was independent of the lipolysis rate, as CCK-8 failed to promote fatty acid release by adipocytes. In addition, CCK-8 did not enhance hormone sensitive lipase phosphorylation, which is the rate-limiting step of lipolysis. Moreover, the effects of CCK-8 were dependent on the activation of protein kinase B and PPARγ. Silencing insulin receptor (IR) expression inhibited CCK-8-induced Aqp7 expression in pre-adipocytes. Furthermore, insulin enhanceded the effect of CCK-8. CONCLUSIONS AND IMPLICATIONS CCK regulates AQP7 expression and function, and this effect is dependent on insulin. Accordingly, CCK receptor agonists could be suitable for preserving and improving insulin responsiveness in WAT.
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Affiliation(s)
- Adrián Plaza
- Departamento de Ciencias Farmacéuticas y de la Salud. Facultad de Farmacia. Universidad CEU - San Pablo. CEU Universities, Madrid, Spain.,Laboratory of Bioactive Products and Metabolic Syndrome, IMDEA Food Institute, Madrid, Spain
| | - Beatriz Merino
- Departamento de Ciencias Farmacéuticas y de la Salud. Facultad de Farmacia. Universidad CEU - San Pablo. CEU Universities, Madrid, Spain
| | - Mariano Ruiz-Gayo
- Departamento de Ciencias Farmacéuticas y de la Salud. Facultad de Farmacia. Universidad CEU - San Pablo. CEU Universities, Madrid, Spain
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Identification of genetic variants the CCKAR gene and based on body measurement and carcass quality characteristics in Qinchuan beef cattle (Bos taurus). ELECTRON J BIOTECHN 2021. [DOI: 10.1016/j.ejbt.2021.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Plaza A, Merino B, Del Olmo N, Ruiz-Gayo M. The cholecystokinin receptor agonist, CCK-8, induces adiponectin production in rat white adipose tissue. Br J Pharmacol 2019; 176:2678-2690. [PMID: 31012948 DOI: 10.1111/bph.14690] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND AND PURPOSE A cholecystokinin (CCK) system has been identified in white adipose tissue (WAT). Nevertheless, the endocrine actions of CCK on WAT remain unknown. Our goal was to investigate the role of CCK in regulating the production of adiponectin, an adipokine expressed in WAT, which is pivotal in preserving energy homeostasis. EXPERIMENTAL APPROACH The effect of the bioactive CCK fragment CCK-8 on adiponectin production was studied both in vivo and in vitro. CCK-8 effects were characterized in rats treated with selective CCK1 and CCK2 receptor antagonists as well as in pre-adipocytes carrying the selective silencing of either CCK1 or CCK2 receptors. The influence of insulin on CCK-8 responses was also analysed. KEY RESULTS In WAT, CCK-8 increased plasma adiponectin levels and the expression of the adiponectin gene (Adipoq). In pre-adipocytes, CCK-8 up-regulated adiponectin production. CCK-8 effects were abolished by L-365,260, a selective CCK2 receptor antagonist. CCK2 receptor knockdown also abolished the effects of CCK-8 in pre-adipocytes. Moreover, in vitro CCK-8 effects were blocked by triciribine, a specific inhibitor of protein kinase B (Akt) and by the PPARγ antagonist T0070907. Silencing the expression of the insulin receptor inhibited CCK-8-induced Adipoq expression in pre-adipocytes. Furthermore, insulin potentiated the effect of CCK-8. CONCLUSION AND IMPLICATIONS CCK-8 stimulates adiponectin production in WAT by acting on CCK2 receptors, through a mechanism involving both Akt and PPARγ. Moreover, CCK-8 actions are only observed in the presence of insulin. Our results could have translational value in the design of new insulin-sensitizing therapies.
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Affiliation(s)
- Adrián Plaza
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
| | - Beatriz Merino
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
| | - Nuria Del Olmo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
| | - Mariano Ruiz-Gayo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
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