scholarly journals Development of CIDEA reporter mouse model and its application for screening thermogenic drugs

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yeonho Son ◽  
Cheoljun Choi ◽  
Cheol Song ◽  
Hyeonyeong Im ◽  
Yoon Keun Cho ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Mouse Model ◽  
Luciferase Activity ◽  
Reporter System ◽  
Drug Induced ◽  
Reporter Mouse ◽  
Protein Levels ◽  
Beige Adipocytes

AbstractCell death-inducing DNA fragmentation factor-like effector A (CIDEA) is a lipid droplet-associated protein and is a known marker of the thermogenic capacity of brown/beige adipocytes. To monitor the expression of CIDEA in live mice in a non-invasive manner, we generated CIDEA reporter mice expressing multicistronic mRNAs encoding CIDEA, luciferase 2, and tdTomato proteins under the control of the Cidea promoter. The expression level of endogenous CIDEA protein in adipose tissue was not affected by the expression of polycistronic reporters. The two CIDEA reporters, luciferase 2 and tdTomato, correctly reflected CIDEA protein levels. Importantly, luciferase activity was induced by cold exposure and the treatment with β3-adrenergic receptor agonist CL316,243 in interscapular and inguinal adipose tissue, which was detectable by in vivo bioluminescence imaging. We further evaluated the effects of candidate brown adipogenic agents using this CIDEA reporter system and demonstrated a positive correlation between drug-induced luciferase activity and thermogenic gene expression levels both in vitro and in vivo. Collectively, we established a dual CIDEA reporter mouse model in which fluorescence and luminescence signals correctly reflect CIDEA expression, and therefore, suggested that this reporter system can be used to evaluate the thermogenic efficacy of candidate molecules.

scholarly journals TMOD-24. GENERATION AND CHARACTERIZATION OF A NOVEL TRANSGENIC IDO REPORTER MOUSE FOR IDO POSTTRANSLATIONAL MODIFICATION ANALYSIS IN SITU

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii233-ii233
Author(s):  
April Bell ◽  
Lijie Zhai ◽  
Erik Ladomersky ◽  
Kristen Lauing ◽  
Lakshmi Bollu ◽  
...  
Keyword(s):  
Mouse Model ◽  
Tumor Cell ◽  
Central Nervous System Tumor ◽  
Post Translational Modifications ◽  
Reporter Mouse ◽  
C Terminus ◽  
Human Gbm

Abstract Glioblastoma (GBM) is the most common and aggressive primary central nervous system tumor in adults with a median survival of 14.6 months. GBM is a potently immunosuppressive cancer due in-part to the prolific expression of immunosuppressive indoleamine 2,3 dioxygenase 1 (IDO). Tumor cell IDO facilitates the intratumoral accumulation of regulatory T cells (Tregs; CD4+CD25+FoxP3+). Although immunosuppressive IDO activity is canonically characterized by the conversion of tryptophan into kynurenine, we have utilized transgenic and syngeneic mouse models and mutant glioma lines to demonstrate that tumor cell IDO increases Treg accumulation independent of tryptophan metabolism. Here, we address the gap in our understanding of IDO signaling activity in vivo. Subcutaneously-engrafted human GBM expressing human IDO-GFP cDNA was isolated from immunodeficient humanized NSG-SGM3 mice. The tumor was immunoprecipitated for the GFP tag using GFP-TRAP followed by mass spectrometry which revealed a novel methylation site on a lysine residue at amino acid 373 in the IDO C-terminus region. Western blot analysis of IDO protein also revealed the presence of tyrosine phosphorylation. Additionally, we recently created a new transgenic IDO reporter mouse model whereby endogenous IDO is fused to GFP via a T2A linker (IDO→GFP). This model allows for the isolation of IDO+ cells in real-time and without causing cell death, thereby creating the opportunity for downstream molecular analysis of in situ-isolated GFP+ cells. Collectively, our work suggests that IDO non-enzyme activity may involve the post-translational modifications we recently identified. As IDO activity may differ between in vitro and in vivo modeling systems, we will use the new IDO→GFP reporter mouse model for an improved mechanistic understanding of how immunosuppressive IDO facilitates Treg accumulation in vivo.

scholarly journals Evaluation of biomarkers for in vitro prediction of drug-induced nephrotoxicity in RPTEC/TERT1 cells

2020 ◽  
Vol 9 (2) ◽  
pp. 91-100 ◽  
Author(s):  
Xuan Qiu ◽  
Yufa Miao ◽  
Xingchao Geng ◽  
Xiaobing Zhou ◽  
Bo Li
Keyword(s):  
Transcriptional Activation ◽  
Messenger Rna ◽  
Aristolochic Acid ◽  
Kidney Injury ◽  
Drug Induced ◽  
Vitro Assay ◽  
Protein Levels ◽  
Aristolochic Acid I

Abstract There have been intensive efforts to identify in vivo biomarkers that can be used to monitor drug-induced kidney damage before significant impairment occurs. Kidney injury molecule-1, neutrophil gelatinase-associated lipocalin, clusterin, β2-microglobulin and cystatin C (CysC) have been validated as clinical or preclinical biomarkers in urinary and plasma predictive of acute and chronic kidney injuries and diseases. A high-throughput in vitro assay predictive of nephrotoxicity could potentially be implemented in early drug discovery stage to reduce attrition at later stages of drug development. To assess the potential of these known in vivo biomarkers for in vitro evaluation of drug-induced nephrotoxicity, we selected four nephrotoxic agents (cisplatin, cyclosporin, aristolochic acid I and gentamicin) and detected their effects on the protein levels of nephrotoxic biomarkers in RPTEC/TERT1 cells. The protein levels of clusterin, CysC, GSTπ and TIMP-1 significantly increased in the conditioned media of RPTEC/TERT1 cells treated with cisplatin, cyclosporin, aristolochic acid I and gentamicin. The messenger RNA levels of clusterin, CysC, GSTπ and TIMP-1 also increased in RPTEC/TERT1 cells treated with cisplatin, cyclosporin, aristolochic acid I and gentamicin, indicating that drug-induced upregulation involves transcriptional activation. Taken together, the results clearly demonstrate that among the known in vivo nephrotoxic biomarkers, clusterin, CysC, GSTπ and TIMP-1 can be effectively used as in vitro biomarkers for drug-induced nephrotoxicity in RPTEC/TERT1 cells.

scholarly journals Immunomodulatory Effects of Adipose Tissue-Derived Stem Cells on Concanavalin A-Induced Acute Liver Injury in Mice

Cell Medicine ◽  
2017 ◽  
Vol 9 (1-2) ◽  
pp. 21-33 ◽  
Author(s):  
Yasuma Yoshizumi ◽  
Hiroshi Yukawa ◽  
Ryoji Iwaki ◽  
Sanae Fujinaka ◽  
Ayano Kanou ◽  
...  
Keyword(s):  
Stem Cells ◽  
Adipose Tissue ◽  
Mouse Model ◽  
Cell Therapy ◽  
Concanavalin A ◽  
Therapeutic Effects ◽  
Dependent Manner ◽  
Immunomodulatory Effects

Cell therapy with adipose tissue-derived stem cells (ASCs) is expected to be a candidate for the treatment of fulminant hepatic failure (FHF), which is caused by excessive immune responses. In order to evaluate the therapeutic effects of ASCs on FHF, the in vitro and in vivo immunomodulatory effects of ASCs were examined in detail in the mouse model. The in vitro effects of ASCs were examined by assessing their influence on the proliferation of lymphomononuclear cells (LMCs) stimulated with three kinds of mitogens: phorbol 12-myristate 13-acetate (PMA) plus ionomycin, concanavalin A (ConA), and lipopolysaccharide (LPS). The proliferation of LMCs was efficiently suppressed in a dose-dependent manner by ASCs in the cases of PMA plus ionomycin stimulation and ConA stimulation, but not in the case of LPS stimulation. The in vivo effects of transplanted ASCs were examined in the murine FHF model induced by ConA administration. The ALT levels and histological inflammatory changes in the ConA-administered mice were apparently relieved by the transplantation of ASCs. The analysis of mRNA expression patterns in the livers indicated that the expressions of the cytokines such as Il-6, Il-10, Ifn-γ, and Tnf-α, and the cell surface markers such as Cd3γ, Cd4, Cd8α, Cd11b, and Cd11c were downregulated in the ASC-transplanted mice. The immunomodulatory and therapeutic effects of ASCs were confirmed in the mouse model both in vitro and in vivo. These suggest that the cell therapy with ASCs is beneficial for the treatment of FHF.

scholarly journals CMKLR1 deficiency attenuates androgen-induced lipid accumulation in mice

2020 ◽  
Vol 318 (3) ◽  
pp. E371-E380 ◽  
Author(s):  
Binbin Huang ◽  
Huashan Zhao ◽  
Chen Huang ◽  
Linlin Wu ◽  
Liang Xiang ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Mouse Model ◽  
Knockout Mice ◽  
Lipid Accumulation ◽  
Public Health Problem ◽  
Pi3k Signaling ◽  
Androgen Treatment ◽  
Brown Adipose

Excess androgen-induced obesity has become a public health problem, and its prevalence has increased substantially in recent years. Chemokine-like receptor 1 (CMKLR1), a receptor of chemerin secreted by adipose tissue, is linked to adipocyte differentiation, adipose tissue development, and obesity. However, the effect of CMKLR1 signaling on androgen-mediated adiposity in vivo remains unclear. Using CMKLR1-knockout mice, we constructed an androgen-excess female mouse model through 5α-dihydrotestosterone (DHT) treatment and an androgen-deficient male mouse model by orchidectomy (ORX). For mechanism investigation, we used 2-(α-Naphthoyl) ethyltrimethylammonium iodide (α-NETA), an antagonist of CMKLR1, to suppress CMKLR1 in vivo and wortmannin, a PI3K signaling antagonist, to treat brown adipose tissue (BAT) explant cultures in vitro . Furthermore, we used histological examination and quantitative PCR, as well as Western blot analysis, glucose tolerance tests, and biochemical analysis of serum, to describe the phenotypes and the changes in gene expression. We demonstrated that excess androgen in the female mice resulted in larger cells in the white adipose tissue (WAT) and the BAT, whereas androgen deprivation in the male mice induced a reduction in cell size. Both of these adipocyte size effects could be attenuated in the CMKLR1-knockout mice. CMKLR1 deficiency influenced the effect of androgen treatment on adipose tissue by regulating the mRNA expression of the androgen receptor (AR) and adipocyte markers (such as Fabp4 and Cidea). Moreover, suppression of CMKLR1 by α-NETA could also reduce the extent of the adipocyte cell enlargement caused by DHT. Furthermore, we found that DHT could reduce the levels of phosphorylated ERK (pERK) in the BAT, while CMKLR1 inactivation inhibited this effect, which had been induced by DHT, through the PI3K signaling pathway. These findings reveal an antiobesity role of CMKLR1 deficiency in regulating lipid accumulation, highlighting the scientific importance for the further development of small-molecule CMKLR1 antagonists as fundamental research tools and/or as potential drugs for use in the treatment of adiposity.

scholarly journals Asc-1 regulates white versus beige adipocyte fate in a subcutaneous stromal cell population

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lisa Suwandhi ◽  
Irem Altun ◽  
Ruth Karlina ◽  
Viktorian Miok ◽  
Tobias Wiedemann ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Stromal Vascular Fraction ◽  
Tissue Expansion ◽  
White Adipocyte ◽  
The Metabolic Syndrome ◽  
Beige Adipocytes ◽  
Subcutaneous Adipose ◽  
Old Mice

AbstractAdipose tissue expansion, as seen in obesity, is often metabolically detrimental causing insulin resistance and the metabolic syndrome. However, white adipose tissue expansion at early ages is essential to establish a functional metabolism. To understand the differences between adolescent and adult adipose tissue expansion, we studied the cellular composition of the stromal vascular fraction of subcutaneous adipose tissue of two and eight weeks old mice using single cell RNA sequencing. We identified a subset of adolescent preadipocytes expressing the mature white adipocyte marker Asc-1 that showed a low ability to differentiate into beige adipocytes compared to Asc-1 negative cells in vitro. Loss of Asc-1 in subcutaneous preadipocytes resulted in spontaneous differentiation of beige adipocytes in vitro and in vivo. Mechanistically, this was mediated by a function of the amino acid transporter ASC-1 specifically in proliferating preadipocytes involving the intracellular accumulation of the ASC-1 cargo D-serine.

scholarly journals HAND2 is a novel obesity-linked adipogenic transcription factor regulated by glucocorticoid signalling

Diabetologia ◽  
2021 ◽  
Author(s):  
Maude Giroud ◽  
Foivos-Filippos Tsokanos ◽  
Giorgio Caratti ◽  
Stefan Kotschi ◽  
Sajjad Khani ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Adipose Tissue ◽  
Mouse Model ◽  
Molecular Mechanisms ◽  
Adipocyte Differentiation ◽  
Gene Clusters ◽  
Data Availability ◽  
Primary Mouse

Abstract Aims/hypothesis Adipocytes are critical cornerstones of energy metabolism. While obesity-induced adipocyte dysfunction is associated with insulin resistance and systemic metabolic disturbances, adipogenesis, the formation of new adipocytes and healthy adipose tissue expansion are associated with metabolic benefits. Understanding the molecular mechanisms governing adipogenesis is of great clinical potential to efficiently restore metabolic health in obesity. Here we investigate the role of heart and neural crest derivatives-expressed 2 (HAND2) in adipogenesis. Methods Human white adipose tissue (WAT) was collected from two cross-sectional studies of 318 and 96 individuals. In vitro, for mechanistic experiments we used primary adipocytes from humans and mice as well as human multipotent adipose-derived stem (hMADS) cells. Gene silencing was performed using siRNA or genetic inactivation in primary adipocytes from loxP and or tamoxifen-inducible Cre-ERT2 mouse models with Cre-encoding mRNA or tamoxifen, respectively. Adipogenesis and adipocyte metabolism were measured by Oil Red O staining, quantitative PCR (qPCR), microarray, glucose uptake assay, western blot and lipolysis assay. A combinatorial RNA sequencing (RNAseq) and ChIP qPCR approach was used to identify target genes regulated by HAND2. In vivo, we created a conditional adipocyte Hand2 deletion mouse model using Cre under control of the Adipoq promoter (Hand2AdipoqCre) and performed a large panel of metabolic tests. Results We found that HAND2 is an obesity-linked white adipocyte transcription factor regulated by glucocorticoids that was necessary but insufficient for adipocyte differentiation in vitro. In a large cohort of humans, WAT HAND2 expression was correlated to BMI. The HAND2 gene was enriched in white adipocytes compared with brown, induced early in differentiation and responded to dexamethasone (DEX), a typical glucocorticoid receptor (GR, encoded by NR3C1) agonist. Silencing of NR3C1 in hMADS cells or deletion of GR in a transgenic conditional mouse model results in diminished HAND2 expression, establishing that adipocyte HAND2 is regulated by glucocorticoids via GR in vitro and in vivo. Furthermore, we identified gene clusters indirectly regulated by the GR–HAND2 pathway. Interestingly, silencing of HAND2 impaired adipocyte differentiation in hMADS and primary mouse adipocytes. However, a conditional adipocyte Hand2 deletion mouse model using Cre under control of the Adipoq promoter did not mirror these effects on adipose tissue differentiation, indicating that HAND2 was required at stages prior to Adipoq expression. Conclusions/interpretation In summary, our study identifies HAND2 as a novel obesity-linked adipocyte transcription factor, highlighting new mechanisms of GR-dependent adipogenesis in humans and mice. Data availability Array data have been submitted to the GEO database at NCBI (GSE148699). Graphical abstract

scholarly journals Targeted Phototherapy for Malignant Pleural Mesothelioma: Near-Infrared Photoimmunotherapy Targeting Podoplanin

Cells ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 1019 ◽  
Author(s):  
Yuko Nishinaga ◽  
Kazuhide Sato ◽  
Hirotoshi Yasui ◽  
Shunichi Taki ◽  
Kazuomi Takahashi ◽  
...  
Keyword(s):  
Targeted Therapy ◽  
Mouse Model ◽  
Near Infrared ◽  
Luciferase Activity ◽  
Group Versus ◽  
Pleural Mesothelioma ◽  
Orthotopic Mouse Model ◽  
Nir Light

Malignant pleural mesothelioma (MPM) has extremely limited treatment despite a poor prognosis. Moreover, molecular targeted therapy for MPM has not yet been implemented; thus, a new targeted therapy is highly desirable. Near-infrared photoimmunotherapy (NIR-PIT) is a recently developed cancer therapy that combines the specificity of antibodies for targeting tumors with toxicity induced by the photoabsorber after exposure to NIR-light. In this study, we developed a new phototherapy targeting podoplanin (PDPN) for MPM with the use of both NIR-PIT and an anti-PDPN antibody, NZ-1. An antibody–photosensitizer conjugate consisting of NZ-1 and phthalocyanine dye was synthesized. In vitro NIR-PIT-induced cytotoxicity was measured with both dead cell staining and luciferase activity on various MPM cell lines. In vivo NIR-PIT was examined in both the flank tumor and orthotopic mouse model with in vivo real-time imaging. In vitro NIR-PIT-induced cytotoxicity was NIR-light dose dependent. In vivo NIR-PIT led to significant reduction in both tumor volume and luciferase activity in a flank model (p < 0.05, NIR-PIT group versus NZ-1-IR700 group). The PDPN-targeted NIR-PIT resulted in a significant antitumor effect in an MPM orthotopic mouse model (p < 0.05, NIR-PIT group versus NZ-1-IR700 group). This study suggests that PDPN-targeted NIR-PIT could be a new promising treatment for MPM.

scholarly journals IRX3 Overexpression Enhances Ucp1 Expression In Vivo

2021 ◽  
Vol 12 ◽  
Author(s):  
Zhiyin Zhang ◽  
Qihan Wu ◽  
Yang He ◽  
Peng Lu ◽  
Danjie Li ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Energy Expenditure ◽  
Rna Sequencing ◽  
Fat Mass ◽  
Moderate Increase ◽  
Adipose Tissues ◽  
Beige Adipocyte ◽  
Beige Adipocytes

ObjectiveThe Iroquois homeobox 3 (IRX3) gene was recently reported to be a functional downstream target of a common polymorphism in the FTO gene, which encodes an obesity-associated protein; however, the role of IRX3 in energy expenditure remains unclear. Studies have revealed that the overexpression of a dominant–negative form of IRX3 in the mouse hypothalamus and adipose tissue promoted energy expenditure by enhancing brown/browning activities. Meanwhile, we and others recently demonstrated that IRX3 knockdown impaired the browning program of primary preadipocytes in vitro. In this study, we aimed to further clarify the effects of overexpressing human IRX3 (hIRX3) on brown/beige adipose tissues in vivo.MethodsBrown/beige adipocyte-specific hIRX3-overexpressing mice were generated and the browning program of white adipose tissues was induced by both chronic cold stimulation and CL316,243 injection. Body weight, fat mass, lean mass, and energy expenditure were measured, while morphological changes and the expression of thermogenesis-related genes in adipose tissue were analyzed. Moreover, the browning capacity of primary preadipocytes derived from hIRX3-overexpressing mice was assessed. RNA sequencing was also employed to investigate the effect of hIRX3 on the expression of thermogenesis-related genes.ResultshIRX3 overexpression in embryonic brown/beige adipose tissues (Rosa26hIRX3;Ucp1-Cre) led to increased energy expenditure, decreased fat mass, and a lean body phenotype. After acute cold exposure or CL316,243 stimulation, brown/beige tissue hIRX3-overexpressing mice showed an increase in Ucp1 expression. Consistent with this, induced hIRX3 overexpression in adult mice (Rosa26hIRX3;Ucp1-CreERT2) also promoted a moderate increase in Ucp1 expression. Ex vitro experiments further revealed that hIRX3 overexpression induced by Ucp1-driven Cre recombinase activity upregulated brown/beige adipocytes Ucp1 expression and oxygen consumption rate (OCR). RNA sequencing analyses indicated that hIRX3 overexpression in brown adipocytes enhanced brown fat cell differentiation, glycolysis, and gluconeogenesis.ConclusionConsistent with the in vitro findings, brown/beige adipocyte-specific overexpression of hIRX3 promoted Ucp1 expression and thermogenesis, while reducing fat mass.

scholarly journals Boosting postnatal oligodendrogenesis in a mouse model of Multiple Sclerosis

2020 ◽  
Author(s):  
Joana Mateus ◽  
Marta Alonso Gomes ◽  
Rita Félix Soares ◽  
Sara L. Paulo ◽  
Ângelo F. Chora ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Mouse Model ◽  
Inflammatory Cytokine ◽  
Motor Impairment ◽  
Molecular Data ◽  
Brain Regions ◽  
Brain Parenchyma ◽  
Protein Levels

Under Multiple Sclerosis pathological conditions, oligodendrocyte precursor cells (OPCs) present in the brain parenchyma or derived from subventricular zone neural stem cells (SVZ-NSCs) can differentiate into oligodendrocytes (OLs), which migrate and partially remyelinate the lesioned areas. Previous data from our group demonstrated that activation of adenosine A2A receptors (A2AR) modulated SVZ-NSCs oligodendroglial differentiation, both in vitro and in vivo under physiological conditions. Hence, we aimed at understanding the role of A2AR in adult oligodendrogenesis derived from SVZ-NSCs in an in vivo mouse model of MS. For this, the Experimental Autoimmune Encephalomyelitis (EAE) mouse model of MS was developed, and behavioural tests were performed to evaluate motor function. Cellular differentiation was assessed by immunohistochemistry assays for bromodeoxyuridine (BrdU) colocalization with oligodendrocytic markers in brain regions of interest. Western blot and ELISA assays were used for myelin protein levels and inflammatory cytokine quantification. Our results for EAE model characterization showed that motor impairment is proportional to the score of the disease and cellular and molecular data showed an increase in the levels of the pro-inflammatory cytokine TNFα (n=5, p<0.01). A significant increase in NG2+BrdU+ cells in the corpus callosum (CC) of EAE mice was observed (n=3, p<0.05), hinting at the migration of OPCs from the SVZ to the CC. Ongoing studies encompass the in vivo modulation of A2AR and assessing its effect on EAE phenotype and adult oligodendrogenesis, ultimately unveiling the modulation of adult oligodendrogenesis derived from SVZ-NSCs by A2AR as a putative therapy for MS.

An essential role for Tbx15 in the differentiation of brown and “brite” but not white adipocytes

2012 ◽  
Vol 303 (8) ◽  
pp. E1053-E1060 ◽  
Author(s):  
Valentina Gburcik ◽  
William P. Cawthorn ◽  
Jan Nedergaard ◽  
James A. Timmons ◽  
Barbara Cannon
Keyword(s):  
Adipose Tissue ◽  
Brown Adipocyte ◽  
Marker Genes ◽  
Phenotypic Marker ◽  
White Adipocytes ◽  
Pparγ Agonist ◽  
Brown Adipose ◽  
Beige Adipocytes

The transcription factor Tbx15 is expressed predominantly in brown adipose tissue and in those white adipose depots that are capable of giving rise to brown-in-white (“brite”/“beige”) adipocytes. Therefore, we have investigated a possible role here of Tbx15 in brown and brite adipocyte differentiation in vitro. Adipocyte precursors were isolated from interscapular and axilliary brown adipose tissues, inguinal white (“brite”) adipose tissue, and epididymal white adipose tissue in 129/Sv mouse pups and differentiated in culture. Differentiation was enhanced by chronic treatment with the PPARγ agonist rosiglitazone plus the sympathetic neurotransmitter norepinephrine. Using short interfering RNAs (siRNA) directed toward Tbx15 in these primary adipocyte cultures, we decreased Tbx15 expression >90%. This resulted in reduced expression levels of adipogenesis markers (PPARγ, aP2). Importantly, Tbx15 knockdown reduced the expression of brown phenotypic marker genes (PRDM16, PGC-1α, Cox8b/Cox4, UCP1) in brown adipocytes and even more markedly in inguinal white adipocytes. In contrast, Tbx15 knockdown had no effect on white adipocytes originating from a depot that is not brite competent in vivo (epididymal). Therefore, Tbx15 may be essential for the development of the adipogenic and thermogenic programs in adipocytes/adipomyocytes capable of developing brown adipocyte features.

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