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1.
Genes Dev ; 35(3-4): 218-233, 2021 02 01.
Article in English | MEDLINE | ID: mdl-33446568

ABSTRACT

Pancreatic ductal adenocarcinoma is a lethal disease characterized by late diagnosis, propensity for early metastasis and resistance to chemotherapy. Little is known about the mechanisms that drive innate therapeutic resistance in pancreatic cancer. The ataxia-telangiectasia group D-associated gene (ATDC) is overexpressed in pancreatic cancer and promotes tumor growth and metastasis. Our study reveals that increased ATDC levels protect cancer cells from reactive oxygen species (ROS) via stabilization of nuclear factor erythroid 2-related factor 2 (NRF2). Mechanistically, ATDC binds to Kelch-like ECH-associated protein 1 (KEAP1), the principal regulator of NRF2 degradation, and thereby prevents degradation of NRF2 resulting in activation of a NRF2-dependent transcriptional program, reduced intracellular ROS and enhanced chemoresistance. Our findings define a novel role of ATDC in regulating redox balance and chemotherapeutic resistance by modulating NRF2 activity.


Subject(s)
Carcinogenesis/genetics , DNA-Binding Proteins/metabolism , Drug Resistance, Neoplasm/genetics , Kelch-Like ECH-Associated Protein 1/metabolism , NF-E2-Related Factor 2/metabolism , Pancreatic Neoplasms/physiopathology , Transcription Factors/metabolism , Humans , Protein Binding , Pancreatic Neoplasms
2.
Genes Dev ; 33(11-12): 641-655, 2019 06 01.
Article in English | MEDLINE | ID: mdl-31048544

ABSTRACT

Pancreatic adenocarcinoma (PDA) is an aggressive disease driven by oncogenic KRAS and characterized by late diagnosis and therapeutic resistance. Here we show that deletion of the ataxia-telangiectasia group D-complementing (Atdc) gene, whose human homolog is up-regulated in the majority of pancreatic adenocarcinoma, completely prevents PDA development in the context of oncogenic KRAS. ATDC is required for KRAS-driven acinar-ductal metaplasia (ADM) and its progression to pancreatic intraepithelial neoplasia (PanIN). As a result, mice lacking ATDC are protected from developing PDA. Mechanistically, we show ATDC promotes ADM progression to PanIN through activation of ß-catenin signaling and subsequent SOX9 up-regulation. These results provide new insight into PDA initiation and reveal ATDC as a potential target for preventing early tumor-initiating events.


Subject(s)
Carcinogenesis , Carcinoma, Pancreatic Ductal/physiopathology , Pancreatic Neoplasms/physiopathology , Proto-Oncogene Proteins p21(ras)/metabolism , Transcription Factors/physiology , Acinar Cells/metabolism , Acinar Cells/pathology , Animals , Carcinoma in Situ/pathology , Carcinoma in Situ/physiopathology , Carcinoma, Pancreatic Ductal/pathology , Cell Transdifferentiation , Cells, Cultured , DNA-Binding Proteins/metabolism , Down-Regulation , Gene Knockdown Techniques , Humans , Metaplasia , Mice , Mice, Transgenic , Pancreatic Ducts/metabolism , Pancreatic Ducts/pathology , Pancreatic Neoplasms/pathology , Proto-Oncogene Proteins p21(ras)/genetics , SOX9 Transcription Factor/genetics , SOX9 Transcription Factor/metabolism , Signal Transduction , Transcription Factors/genetics , Transcription Factors/metabolism , beta Catenin/metabolism
3.
Gut ; 70(4): 743-760, 2021 04.
Article in English | MEDLINE | ID: mdl-32873698

ABSTRACT

OBJECTIVE: ATM serine/threonine kinase (ATM) is the most frequently mutated DNA damage response gene, involved in homologous recombination (HR), in pancreatic ductal adenocarcinoma (PDAC). DESIGN: Combinational synergy screening was performed to endeavour a genotype-tailored targeted therapy. RESULTS: Synergy was found on inhibition of PARP, ATR and DNA-PKcs (PAD) leading to synthetic lethality in ATM-deficient murine and human PDAC. Mechanistically, PAD-induced PARP trapping, replication fork stalling and mitosis defects leading to P53-mediated apoptosis. Most importantly, chemical inhibition of ATM sensitises human PDAC cells toward PAD with long-term tumour control in vivo. Finally, we anticipated and elucidated PARP inhibitor resistance within the ATM-null background via whole exome sequencing. Arising cells were aneuploid, underwent epithelial-mesenchymal-transition and acquired multidrug resistance (MDR) due to upregulation of drug transporters and a bypass within the DNA repair machinery. These functional observations were mirrored in copy number variations affecting a region on chromosome 5 comprising several of the upregulated MDR genes. Using these findings, we ultimately propose alternative strategies to overcome the resistance. CONCLUSION: Analysis of the molecular susceptibilities triggered by ATM deficiency in PDAC allow elaboration of an efficient mutation-specific combinational therapeutic approach that can be also implemented in a genotype-independent manner by ATM inhibition.


Subject(s)
Adenocarcinoma/genetics , Ataxia Telangiectasia Mutated Proteins/genetics , Carcinoma, Pancreatic Ductal/genetics , Homologous Recombination , Pancreatic Neoplasms/genetics , Poly(ADP-ribose) Polymerase Inhibitors/pharmacology , Adenocarcinoma/drug therapy , Animals , Apoptosis , Carcinoma, Pancreatic Ductal/drug therapy , Cell Line, Tumor , Cell Survival , DNA Copy Number Variations , DNA Damage , DNA Repair , Drug Resistance, Multiple/genetics , Drug Synergism , Epithelial-Mesenchymal Transition , Genotype , Humans , Mice , Pancreatic Neoplasms/drug therapy , Prognosis
4.
Cell Microbiol ; 17(11): 1670-82, 2015 Nov.
Article in English | MEDLINE | ID: mdl-26041307

ABSTRACT

CagA is a multifunctional toxin of Helicobacter pylori that is secreted into host epithelial cells by a type IV secretion system. Following host cell translocation, CagA interferes with various host-cell signalling pathways. Most notably this toxin is involved in the disruption of apical-basolateral cell polarity and cell adhesion, as well as in the induction of cell proliferation, migration and cell morphological changes. These are processes that also play an important role in epithelial-to-mesenchymal transition and cancer cell invasion. In fact, CagA is considered as the only known bacterial oncoprotein. The cellular effects are triggered by a variety of CagA activities including the inhibition of serine-threonine kinase Par1b/MARK2 and the activation of tyrosine phosphatase SHP-2. Additionally, CagA was described to affect the activity of Src family kinases and C-terminal Src kinase (Csk) suggesting that interference with multiple cellular kinase- and phosphatase-associated signalling pathways is a major function of CagA. Here, we describe the effect of CagA on protein kinase C-related kinase 2 (PRK2), which acts downstream of Rho GTPases and is known to affect cytoskeletal rearrangements and cell polarity. CagA interacts with PRK2 and inhibits its kinase activity. Because PRK2 has been linked to cytoskeletal rearrangements and establishment of cell polarity, we suggest that CagA may hijack PRK2 to further manipulate cancer-related signalling pathways.


Subject(s)
Antigens, Bacterial/metabolism , Bacterial Proteins/metabolism , Helicobacter pylori/physiology , Host-Pathogen Interactions , Protein Kinase C/metabolism , Protein Serine-Threonine Kinases/metabolism , Cell Polarity , Cell Proliferation , Epithelial Cells/microbiology , Epithelial Cells/physiology , Epithelial-Mesenchymal Transition , Protein Binding , Protein Kinase C/antagonists & inhibitors , Protein Serine-Threonine Kinases/antagonists & inhibitors
5.
Stem Cells ; 29(12): 2051-61, 2011 Dec.
Article in English | MEDLINE | ID: mdl-22009661

ABSTRACT

Human heart harbors a population of resident progenitor cells that can be isolated by stem cell antigen-1 antibody and expanded in culture. These cells can differentiate into cardiomyocytes in vitro and contribute to cardiac regeneration in vivo. However, when directly injected as single cell suspension, less than 1%-5% survive and differentiate. Among the major causes of this failure are the distressing protocols used to culture in vitro and implant progenitor cells into damaged hearts. Human cardiac progenitors obtained from the auricles of patients were cultured as scaffoldless engineered tissues fabricated using temperature-responsive surfaces. In the engineered tissue, progenitor cells established proper three-dimensional intercellular relationships and were embedded in self-produced extracellular matrix preserving their phenotype and multipotency in the absence of significant apoptosis. After engineered tissues were leant on visceral pericardium, a number of cells migrated into the murine myocardium and in the vascular walls, where they integrated in the respective textures. The study demonstrates the suitability of such an approach to deliver stem cells to the myocardium. Interestingly, the successful delivery of cells in murine healthy hearts suggests that myocardium displays a continued cell cupidity that is strictly regulated by the limited release of progenitor cells by the adopted source. When an unregulated cell source is added to the system, cells are delivered to the myocardium. The exploitation of this novel concept may pave the way to the setup of new protocols in cardiac cell therapy.


Subject(s)
Heart Ventricles/transplantation , Myocardium/metabolism , Myocytes, Cardiac/cytology , Stem Cells/cytology , Tissue Engineering/methods , Aged , Aged, 80 and over , Animals , Cell Differentiation , Cell Movement , Coculture Techniques , Female , Gene Expression Profiling , Heart Ventricles/cytology , Heart Ventricles/metabolism , Humans , Male , Mice , Mice, Inbred C57BL , Middle Aged , Myocardium/cytology , Myocytes, Cardiac/physiology , Myocytes, Cardiac/transplantation , Phenotype , Tissue Transplantation/methods
6.
Commun Biol ; 4(1): 517, 2021 05 03.
Article in English | MEDLINE | ID: mdl-33941818

ABSTRACT

Erythropoiesis involves complex interrelated molecular signals influencing cell survival, differentiation, and enucleation. Diseases associated with ineffective erythropoiesis, such as ß-thalassemias, exhibit erythroid expansion and defective enucleation. Clear mechanistic determinants of what make erythropoiesis effective are lacking. We previously demonstrated that exogenous transferrin ameliorates ineffective erythropoiesis in ß-thalassemic mice. In the current work, we utilize transferrin treatment to elucidate a molecular signature of ineffective erythropoiesis in ß-thalassemia. We hypothesize that compensatory mechanisms are required in ß-thalassemic erythropoiesis to prevent apoptosis and enhance enucleation. We identify pleckstrin-2-a STAT5-dependent lipid binding protein downstream of erythropoietin-as an important regulatory node. We demonstrate that partial loss of pleckstrin-2 leads to worsening ineffective erythropoiesis and pleckstrin-2 knockout leads to embryonic lethality in ß-thalassemic mice. In addition, the membrane-associated active form of pleckstrin-2 occurs at an earlier stage during ß-thalassemic erythropoiesis. Furthermore, membrane-associated activated pleckstrin-2 decreases cofilin mitochondrial localization in ß-thalassemic erythroblasts and pleckstrin-2 knockdown in vitro induces cofilin-mediated apoptosis in ß-thalassemic erythroblasts. Lastly, pleckstrin-2 enhances enucleation by interacting with and activating RacGTPases in ß-thalassemic erythroblasts. This data elucidates the important compensatory role of pleckstrin-2 in ß-thalassemia and provides support for the development of targeted therapeutics in diseases of ineffective erythropoiesis.


Subject(s)
Apoptosis , Cell Nucleus/pathology , Erythroblasts/pathology , Erythropoiesis , Membrane Proteins/physiology , beta-Thalassemia/pathology , Animals , Cell Nucleus/metabolism , Erythroblasts/metabolism , Female , Male , Mice , Mice, Inbred C57BL , Mice, Knockout , beta-Thalassemia/etiology , beta-Thalassemia/metabolism
7.
Am J Physiol Heart Circ Physiol ; 298(4): H1155-65, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20061536

ABSTRACT

Hepatocyte growth factor (HGF), a pleiotropic cytokine with mitogenic, motogenic, morphogenic, and antiapoptotic effects in various cell types, is a cardioprotective growth factor that can counteract the loss of cardiomyocytes usually observed in cardiac diseases. HGF is a quite unstable molecule in its biologically active heterodimeric form. Since all HGF-induced biological responses are mediated by its high-affinity tyrosine kinase receptor (Met/HGF-R) encoded by the Met gene, we asked whether a monoclonal antibody (MAb) that displays receptor full agonist activity could protect cardiac muscle cell lines from hydrogen peroxide-induced apoptosis. We report that the MAb efficiently inhibited hydrogen peroxide-induced cell shrinkage, DNA fragmentation, annexin V positivity, mitochondrial translocation of bax, and caspase activation. The MAb was thus able to counteract apoptosis evaluated by both morphological and biochemical criteria. The agonist activity of the MAb was mediated by Met/HGF-R, since a Met/HGF-R-specific short hairpin RNA (shRNA) inhibited both activation of transduction pathways and motility triggered by MAb DO-24. The protective antiapoptotic effect of MAb DO-24 was dependent on activation of the ras-MAPK Erk1/2 and phosphatidylinositol 3-kinase (PI3-kinase)-Akt transduction pathways, since it was abrogated by treatments with their specific pharmacological inhibitors, PD-98059 and wortmannin. Moreover, the MAb induced a motogenic, but not mitogenic, response in these cells, mimicking in all aspects the natural ligand HGF but displaying a significant higher stability than HGF in culture. This MAb may thus be a valuable substitute for HGF, being more easily available in a biologically active, highly stable, and purified form.


Subject(s)
Antibodies, Monoclonal/pharmacology , Apoptosis/drug effects , Myocytes, Cardiac/cytology , Myocytes, Cardiac/drug effects , Proto-Oncogene Proteins c-met/drug effects , Animals , Antibodies, Monoclonal/immunology , Cell Line , Cell Movement/drug effects , Cell Proliferation/drug effects , Dogs , Extracellular Signal-Regulated MAP Kinases/metabolism , Hydrogen Peroxide/pharmacology , Mice , Models, Animal , Myocytes, Cardiac/metabolism , NIH 3T3 Cells , Phosphatidylinositol 3-Kinases/metabolism , Proto-Oncogene Proteins c-akt/drug effects , Proto-Oncogene Proteins c-akt/metabolism , Proto-Oncogene Proteins c-met/immunology , Proto-Oncogene Proteins c-met/metabolism , Proto-Oncogene Proteins p21(ras)/metabolism , Rats , Signal Transduction/drug effects
8.
Cell Cycle ; 18(3): 299-311, 2019 02.
Article in English | MEDLINE | ID: mdl-30580666

ABSTRACT

The serine/threonine kinase Par1 is a core component of the machinery that sets up polarity in the embryo and regulates cell fate decisions but its role in the homeostasis of adult tissues is poorly understood. Inhibition of Par1 by the bacterium Helicobacter pylori (H. pylori) represents the only established pathology that affects Par1 function in an adult epithelium. Thus, during chronic H. pylori infection of the gastric mucosa Par1 is one of the targets of the non-obligate H.pylori cytotoxic protein and oncogene CagA, which stimulates inflammation and triggers morphological changes, both believed to contribute to the gastric cancer risk imposed by H. pylori infection. Based on Par1's role in cell polarity, it has been speculated that Par1 inhibition affects epithelial polarity. Here we report the unexpected finding that CagA-mediated Par1-inhibition promotes the generation of DNA Double Strand Breaks in primary gastric epithelial cells, which likely contributes to the reported accumulation of mutations in chronically infected mucosal cells. Abbreviations: AGS: human gastric adenocarcinoma cell line; CM: CagA Multimerization (and Par1 binding) domain; H. pylori: Helicobacter pylori; DSB: Double Strand Break; HGECs: human (primary) gastric epithelial cells; IB: immunoblot; IF: immunofluorescence; MOI: Multiplicity of Infection; ROS: reactive oxygen species; Par1: Partitioning Defective 1 kinase; WT: wild type.


Subject(s)
DNA Breaks, Double-Stranded , Gastric Mucosa/enzymology , Gastric Mucosa/microbiology , Helicobacter pylori , Protein Serine-Threonine Kinases/antagonists & inhibitors , Antigens, Bacterial/metabolism , Apoptosis , Bacterial Proteins/metabolism , Cell Line, Tumor , Humans
9.
Methods Mol Biol ; 1553: 169-182, 2017.
Article in English | MEDLINE | ID: mdl-28229415

ABSTRACT

Adipose tissue has been shown to be particularly advantageous as source of mesenchymal stem cells (MSCs), because of its easy accessibility, and the possibility of obtaining stem cells in high yields. MSCs are obtained from the so-called Stromal Vascular Fraction, (SVF), exploiting their property of adhering to plastic surfaces and can be further purified by positive or negative immunomagnetic selection with appropriately chosen antibodies. These cells (Stromal Stem Cells, SSCs) can then be directly analyzed, frozen in liquid nitrogen, or expanded for further applications, e.g., for tissue engineering and regenerative medicine. The methodology described here in detail for SSCs isolated from mouse subcutaneous adipose tissue can be applied to human tissues, such as epicardium.


Subject(s)
Adipose Tissue/cytology , Cell Separation , Mesenchymal Stem Cells/cytology , Mesenchymal Stem Cells/metabolism , Animals , Biomarkers , Cell Culture Techniques , Cell Differentiation , Cell Lineage , Cell Separation/methods , Cells, Cultured , Cryopreservation/methods , Humans , Immunophenotyping/methods , Mice , Microscopy, Fluorescence
10.
PLoS One ; 10(9): e0137999, 2015.
Article in English | MEDLINE | ID: mdl-26375957

ABSTRACT

A major obstacle to an effective myocardium stem cell therapy has always been the delivery and survival of implanted stem cells in the heart. Better engraftment can be achieved if cells are administered as cell aggregates, which maintain their extra-cellular matrix (ECM). We have generated spheroid aggregates in less than 24 h by seeding human cardiac progenitor cells (hCPCs) onto methylcellulose hydrogel-coated microwells. Cells within spheroids maintained the expression of stemness/mesenchymal and ECM markers, growth factors and their cognate receptors, cardiac commitment factors, and metalloproteases, as detected by immunofluorescence, q-RT-PCR and immunoarray, and expressed a higher, but regulated, telomerase activity. Compared to cells in monolayers, 3D spheroids secreted also bFGF and showed MMP2 activity. When spheroids were seeded on culture plates, the cells quickly migrated, displaying an increased wound healing ability with or without pharmacological modulation, and reached confluence at a higher rate than cells from conventional monolayers. When spheroids were injected in the heart wall of healthy mice, some cells migrated from the spheroids, engrafted, and remained detectable for at least 1 week after transplantation, while, when the same amount of cells was injected as suspension, no cells were detectable three days after injection. Cells from spheroids displayed the same engraftment capability when they were injected in cardiotoxin-injured myocardium. Our study shows that spherical in vivo ready-to-implant scaffold-less aggregates of hCPCs able to engraft also in the hostile environment of an injured myocardium can be produced with an economic, easy and fast protocol.


Subject(s)
Heart/physiology , Myocardium/cytology , Spheroids, Cellular/cytology , Spheroids, Cellular/transplantation , Stem Cell Transplantation , Stem Cells/cytology , Tissue Engineering , Aged , Aged, 80 and over , Animals , Blotting, Western , Cell Differentiation , Cell Movement , Cell Proliferation , Cells, Cultured , Female , Fluorescent Antibody Technique , Humans , Immunoenzyme Techniques , Male , Mice , Mice, Inbred C57BL , Middle Aged , Myocardium/metabolism , RNA, Messenger/genetics , Real-Time Polymerase Chain Reaction , Reverse Transcriptase Polymerase Chain Reaction , Spheroids, Cellular/metabolism , Stem Cells/metabolism , Tissue Scaffolds
11.
Food Funct ; 5(10): 2542-51, 2014 Oct.
Article in English | MEDLINE | ID: mdl-25133994

ABSTRACT

Cocoa contains phenolic compounds with known antioxidant and antiradical properties beneficial in different pathologies, including cardiovascular diseases. Herein, we have evaluated the protective effects of clovamide, a minor cocoa component, against oxidative stress induced in the rat cardiomyoblast cell line, also comparing it to its bio-isosteric form, rosmarinic acid, and to the main monomeric flavan-3-ol from low-molecular-weight polyphenol in cocoa, i.e. epicatechin. At nano-micro-molar concentrations, the three compounds inhibited the production of reactive oxygen species and apoptosis, evaluated under different aspects, namely, annexin V positivity, DNA fragmentation, caspase release and activation. These molecules can, thus, be considered for their bioactive beneficial activity in the context of cardiovascular pathologies and, particularly, in the protection towards oxidative stress that follows ischemic injury. Clovamide may, thus, be the primary compound for the development of innovative nutraceutical strategies towards cardiovascular diseases.


Subject(s)
Hydrogen Peroxide/adverse effects , Myoblasts, Cardiac/drug effects , Stress, Physiological/drug effects , Tyrosine/analogs & derivatives , Animals , Antioxidants/pharmacology , Apoptosis/drug effects , Cacao/chemistry , Cell Line , Cinnamates/pharmacology , DNA Fragmentation/drug effects , Depsides/pharmacology , Flavonoids/pharmacology , Myoblasts, Cardiac/cytology , Myoblasts, Cardiac/metabolism , Oxidative Stress/drug effects , Rats , Reactive Oxygen Species/metabolism , Tyrosine/pharmacology , Rosmarinic Acid
12.
Stem Cells Dev ; 23(8): 888-98, 2014 Apr 15.
Article in English | MEDLINE | ID: mdl-24328510

ABSTRACT

Electrical stimulation (ES) of cells has been shown to induce a variety of responses, such as cytoskeleton rearrangements, migration, proliferation, and differentiation. In this study, we have investigated whether monophasic and biphasic pulsed ES could exert any effect on the proliferation and differentiation of human cardiac progenitor cells (hCPCs) isolated from human heart fragments. Cells were cultured under continuous exposure to monophasic or biphasic ES with fixed cycles for 1 or 3 days. Results indicate that neither stimulation protocol affected cell viability, while the cell shape became more elongated and reoriented more perpendicular to the electric field direction. Moreover, the biphasic ES clearly induced the upregulation of early cardiac transcription factors, MEF2D, GATA-4, and Nkx2.5, as well as the de novo expression of the late cardiac sarcomeric proteins, troponin T, cardiac alpha actinin, and SERCA 2a. Both treatments increased the expression of connexin 43 and its relocation to the cell membrane, but biphasic ES was faster and more effective. Finally, when hCPCs were exposed to both monophasic and biphasic ES, they expressed de novo the mRNA of the voltage-dependent calcium channel Cav 3.1(α1G) subunit, which is peculiar of the developing heart. Taken together, these results show that ES alone is able to set the conditions for early differentiation of adult hCPCs toward a cardiac phenotype.


Subject(s)
Adult Stem Cells/physiology , Cell Differentiation , Biomarkers/metabolism , Cell Proliferation , Cell Shape , Cell Survival , Cells, Cultured , Electric Stimulation , Gene Expression , Gene Expression Regulation , Heart Atria/cytology , Humans
13.
Stem Cells Dev ; 22(21): 2873-84, 2013 Nov 01.
Article in English | MEDLINE | ID: mdl-23777308

ABSTRACT

The emerging field of tissue engineering and regenerative medicine is a multidisciplinary science that is based on the combination of a reliable source of stem cells, biomaterial scaffolds, and cytokine growth factors. Adult mesenchymal stem cells are considered important cells for applications in this field, and adipose tissue has revealed to be an excellent source of them. Indeed, adipose-derived stem cells (ASCs) can be easily isolated from the stromal vascular fraction (SVF) of adipose tissue. During the isolation and propagation of murine ASCs, we observed the appearance of a spontaneously immortalized cell clone, named m17.ASC. This clone has been propagated for more than 180 passages and stably expresses a variety of stemness markers, such as Sca-1, c-kit/CD117, CD44, CD106, islet-1, nestin, and nucleostemin. Furthermore, these cells can be induced to differentiate toward osteogenic, chondrogenic, adipogenic, and cardiogenic phenotypes. m17.ASC clone displays a normal karyotype and stable telomeres; it neither proliferates when plated in soft agar nor gives rise to tumors when injected subcutaneously in NOD/SCID-γ (null) mice. The analysis of gene expression highlighted transcriptional traits of SVF cells. m17.ASCs were genetically modified by lentiviral vectors carrying green fluorescent protein (GFP) as a marker transgene and efficiently engrafted in the liver, when injected in the spleen of NOD/SCID-γ (null) monocrotaline-treated mice. These results suggest that this non-tumorigenic spontaneously immortalized ASC line may represent a useful tool (cell model) for studying the differentiation mechanisms involved in tissue repair as well as a model for pharmacological/toxicological studies.


Subject(s)
Mesenchymal Stem Cell Transplantation/methods , Mesenchymal Stem Cells/cytology , Multipotent Stem Cells/cytology , Subcutaneous Fat/cytology , Adipocytes/cytology , Adipocytes/metabolism , Animals , Antigens, Ly/genetics , Antigens, Ly/metabolism , Cell Differentiation/genetics , Cell Line , Chondrocytes/cytology , Chondrocytes/metabolism , Clone Cells/cytology , Clone Cells/metabolism , Clone Cells/transplantation , Gene Expression Profiling , Green Fluorescent Proteins/genetics , Green Fluorescent Proteins/metabolism , Interleukin Receptor Common gamma Subunit/deficiency , Interleukin Receptor Common gamma Subunit/genetics , Karyotype , Male , Membrane Proteins/genetics , Membrane Proteins/metabolism , Mesenchymal Stem Cells/metabolism , Mice , Mice, Inbred NOD , Mice, Knockout , Mice, SCID , Microscopy, Confocal , Multipotent Stem Cells/metabolism , Myocytes, Cardiac/cytology , Myocytes, Cardiac/metabolism , Osteocytes/cytology , Osteocytes/metabolism , Proto-Oncogene Proteins c-kit/genetics , Proto-Oncogene Proteins c-kit/metabolism , Reverse Transcriptase Polymerase Chain Reaction
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