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Claes J, Agten A, Blázquez-Moreno A, Crabbe M, Tuefferd M, Goehlmann H, Geys H, Peng CY, Neyens T, Faes C. The influence of resolution on the predictive power of spatial heterogeneity measures as biomarkers of liver fibrosis. Comput Biol Med 2024; 171:108231. [PMID: 38422965 DOI: 10.1016/j.compbiomed.2024.108231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/23/2024] [Accepted: 02/25/2024] [Indexed: 03/02/2024]
Abstract
Spatial heterogeneity of cells in liver biopsies can be used as biomarker for disease severity of patients. This heterogeneity can be quantified by non-parametric statistics of point pattern data, which make use of an aggregation of the point locations. The method and scale of aggregation are usually chosen ad hoc, despite values of the aforementioned statistics being heavily dependent on them. Moreover, in the context of measuring heterogeneity, increasing spatial resolution will not endlessly provide more accuracy. The question then becomes how changes in resolution influence heterogeneity indicators, and subsequently how they influence their predictive abilities. In this paper, cell level data of liver biopsy tissue taken from chronic Hepatitis B patients is used to analyze this issue. Firstly, Morisita-Horn indices, Shannon indices and Getis-Ord statistics were evaluated as heterogeneity indicators of different types of cells, using multiple resolutions. Secondly, the effect of resolution on the predictive performance of the indices in an ordinal regression model was investigated, as well as their importance in the model. A simulation study was subsequently performed to validate the aforementioned methods. In general, for specific heterogeneity indicators, a downward trend in predictive performance could be observed. While for local measures of heterogeneity a smaller grid-size is outperforming, global measures have a better performance with medium-sized grids. In addition, the use of both local and global measures of heterogeneity is recommended to improve the predictive performance.
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Affiliation(s)
- Jari Claes
- Data Science Institute, UHasselt - Hasselt University, Agoralaan 1, Diepenbeek, 3590, Belgium.
| | - Annelies Agten
- Data Science Institute, UHasselt - Hasselt University, Agoralaan 1, Diepenbeek, 3590, Belgium
| | - Alfonso Blázquez-Moreno
- Discovery Statistics, Global Development, Janssen Research and Development, Turnhoutseweg 30, Beerse, 2340, Belgium
| | - Marjolein Crabbe
- Discovery Statistics, Global Development, Janssen Research and Development, Turnhoutseweg 30, Beerse, 2340, Belgium
| | - Marianne Tuefferd
- Translational Biomarkers, Infectious Diseases, Janssen Research and Development, Turnhoutseweg 30, Beerse, 2340, Belgium
| | - Hinrich Goehlmann
- Translational Biomarkers, Infectious Diseases, Janssen Research and Development, Turnhoutseweg 30, Beerse, 2340, Belgium
| | - Helena Geys
- Discovery Statistics, Global Development, Janssen Research and Development, Turnhoutseweg 30, Beerse, 2340, Belgium
| | | | - Thomas Neyens
- Data Science Institute, UHasselt - Hasselt University, Agoralaan 1, Diepenbeek, 3590, Belgium; L-BioStat, KU Leuven, Kapucijnenvoer 35, Leuven, 3000, Belgium
| | - Christel Faes
- Data Science Institute, UHasselt - Hasselt University, Agoralaan 1, Diepenbeek, 3590, Belgium
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Li H, Dong Y, Han C, Xia L, Zhang Y, Chen T, Wang H, Xu G. Suramin, an antiparasitic drug, stimulates adipocyte differentiation and promotes adipogenesis. Lipids Health Dis 2023; 22:222. [PMID: 38093311 PMCID: PMC10717495 DOI: 10.1186/s12944-023-01980-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 11/25/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Previous studies demonstrated that mast cells with their degranulated component heparin are the major endogenous factors that stimulate preadipocyte differentiation and promote fascial adipogenesis, and this effect is related to the structure of heparin. Regarding the structural and physiological properties of the negatively charged polymers, hexasulfonated suramin, a centuries-old medicine that is still used for treating African trypanosomiasis and onchocerciasis, is assumed to be a heparin-related analog or heparinoid. This investigation aims to elucidate the influence of suramin on the adipogenesis. METHODS To assess the influence exerted by suramin on adipogenic differentiation of primary white adipocytes in rats, this exploration was conducted both in vitro and in vivo. Moreover, it was attempted to explore the role played by the sulfonic acid groups present in suramin in mediating this adipogenic process. RESULTS Suramin demonstrated a dose- and time-dependent propensity to stimulate the adipogenic differentiation of rat preadipocytes isolated from the superficial fascia tissue and from adult adipose tissue. This stimulation was concomitant with a notable upregulation in expression levels of pivotal adipogenic factors as the adipocyte differentiation process unfolded. Intraperitoneal injection of suramin into rats slightly increased adipogenesis in the superficial fascia and in the epididymal and inguinal fat depots. PPADS, NF023, and NF449 are suramin analogs respectively containing 2, 6, and 8 sulfonic acid groups, among which the last two moderately promoted lipid droplet formation and adipocyte differentiation. The number and position of sulfonate groups may be related to the adipogenic effect of suramin. CONCLUSIONS Suramin emerges as a noteworthy pharmaceutical agent with the unique capability to significantly induce adipocyte differentiation, thereby fostering adipogenesis.
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Affiliation(s)
- Hanxiao Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Yingyue Dong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Chunmiao Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Lisha Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Yue Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Tongsheng Chen
- Key Laboratory of Functional and Clinical Translational Medicine, Department of Physiology, Xiamen Medical College, 361023, Xiamen, China
| | - Huamin Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China
| | - Guoheng Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, 100191, Beijing, China.
- State Key Laboratory of Vascular Homeostasis and Remodeling,Peking University, Beijing, China.
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Abstract
The organoid is a 3D cell architecture formed by self-organized tissues or cells in vitro with similar cell types, histological structures, and biological functions of the native organ. Depending on the unique organ structures and cell types, producing organoids requires individualized design and is still challenging. Organoids of some tissues, including adipose tissue, remain to generate to be more faithful to their original organ in structure and function. We previously established a new model of the origin of adipose cells originating from non-adipose fascia tissue. Here, we investigated superficial fascia fragments in 3D hydrogel and found they were able to transform into relatively large adipocyte aggregates containing mature unilocular adipocytes, which were virtually "fat organoids". Such fascia-originated fat organoids had a typical structure of adipose tissues and possessed the principal function of adipose cells in the synthesis, storage, hydrolysis of triglycerides and adipokines secretion. Producing fat organoids from superficial fascia can provide a new approach for adipocyte research and strongly evidences that both adipose tissues and cells originate from fascia. Our findings give insights into metabolic regulation by the crosstalk between different organs and tissues and provide new knowledge for investigating novel treatments for obesity, diabetes and other metabolic diseases.Abbreviations: 3D: three dimensional; ASC: adipose-derived stromal cells; C/EBP: CCAAT-enhancer-binding protein; EdU: 5-ethynyl-2-deoxyuridine; FABP4: fatty acid-binding protein 4; FAS: fatty acid synthase; FSCs: fascia-derived stromal cells; Plin1: perilipin-1; Plin2: perilipin-2; PPARγ: peroxisome proliferator-activated receptor γ; WAT: white adipose tissue.
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Affiliation(s)
- Yanfei Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing, Peking, China
| | - Yuanyuan Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing, Peking, China
| | - Yingyue Dong
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing, Peking, China
| | - Tongsheng Chen
- Key Laboratory of Functional and Clinical Translational Medicine, Department of Physiology, Xiamen Medical College, Xiamen, Fujian, China
| | - Guoheng Xu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing, Peking, China,CONTACT Guoheng Xu Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing100191, China
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Dong Y, Zhang D, Cao Y, Zhang Y, Sun X, Chen T, Zhang Y, Xu G. Mathematical analysis for spatial distribution of vessels, mast cells and adipocytes in superficial fascia. Front Physiol 2022; 13:1026019. [PMID: 36452040 PMCID: PMC9702360 DOI: 10.3389/fphys.2022.1026019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/31/2022] [Indexed: 12/18/2023] Open
Abstract
As a novel origin of adipocytes, the superficial fascia, a typical soft connective tissue, has abundant adipocytes and preadipocytes, accompanied by numerous mast cells. Blood vessels pass through the fascia to form a network structure. The more reasonable statistical analysis methods can provide a new method for in-depth study of soft connective tissue by clarifying the spatial distribution relation between cells (point structure) and blood vessels (linear structure). This study adopted the Guidolin et al. statistical analysis methods used by epidemiology and ecology to quantitatively analyze the distribution pattern and correlations among blood vessels, adipocytes, and mast cells. Image-processing software and self-written computer programs were used to analyze images of whole-mounted fascia, and the relevant data were measured automatically. Voronoi's analysis revealed that the vascular network was non-uniformly distributed. In fascia with average area of 3.75 cm2, quantitative histological analysis revealed 81.16% of mast cells and 74.74% of adipocytes distributed within 60 μm of blood vessels. A Spearman's correlation coefficient (rs) of >0.7 showed the co-distribution of the two types of cells under different areas. Ridge regression analysis further revealed the spatial correlation among blood vessels, adipocytes and mast cells. The combination of classical epidemiological analysis and extended computer program analysis can better analyze the spatial distribution relation between cells and vessels and should provide an effective analysis method for study of the histology and morphology of fascia and related connective tissues.
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Affiliation(s)
- Yingyue Dong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Dandan Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Yingri Cao
- Department of Civil Engineering, Tsinghua University, Beijing, China
| | - Yanfei Zhang
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaozhe Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Tongsheng Chen
- Key Laboratory of Functional and Clinical Translational Medicine, Department of Physiology, Xiamen Medical College, Xiamen, China
| | - Yuanyuan Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Guoheng Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
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Hyde KA, Aguiar FLN, Alvarenga PB, Rezende AL, Alves BG, Alves KA, Gastal GDA, Gastal MO, Gastal EL. Characterization of preantral follicle clustering and neighborhood patterns in the equine ovary. PLoS One 2022; 17:e0275396. [PMID: 36194590 PMCID: PMC9531796 DOI: 10.1371/journal.pone.0275396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 09/14/2022] [Indexed: 11/18/2022] Open
Abstract
Understanding the transition from quiescent primordial follicles to activated primary follicles is vital for characterizing ovarian folliculogenesis and improving assisted reproductive techniques. To date, no study has investigated preantral follicle crowding in the ovaries of livestock or characterized these crowds according to follicular morphology and ovarian location (portions and regions) in any species. Therefore, the present study aimed to assess the crowding (clustering and neighborhood) patterns of preantral follicles in the equine ovary according to mare age, follicular morphology and developmental stage, and spatial location in the ovary. Ovaries from mares (n = 8) were collected at an abattoir and processed histologically for evaluation of follicular clustering using the Morisita Index and follicular neighborhoods in ovarian sections. Young mares were found to have a large number of preantral follicles with neighbors (n = 2,626), while old mares had a small number (n = 305). Moreover, young mares had a higher number of neighbors per follicle (2.6 ± 0.0) than old mares (1.2 ± 0.1). Follicle clustering was shown to be present in all areas of the ovary, with young mares having more clustering overall than old mares and a tendency for higher clustering in the ventral region when ages were combined. Furthermore, follicles with neighbors were more likely to be morphologically normal (76.5 ± 6.5%) than abnormal (23.5 ± 6.5%). Additionally, morphologically normal activated follicles had increased odds of having neighbors than normal resting follicles, and these normal activated follicles had more neighbors (2.6 ± 0.1) than normal resting follicles (2.3 ± 0.1 neighbors). In the present study, it was demonstrated that preantral follicles do crowd in the mare ovary and that clustering/neighborhood patterns are dynamic and differ depending on mare age, follicular morphology, and follicular developmental stage.
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Affiliation(s)
- Kendall A. Hyde
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Francisco L. N. Aguiar
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
- Department of Veterinary Medicine, Sousa Campus, Federal Institute of Education, Science and Technology of Paraíba, Sousa, Paraíba, Brazil
| | - Paula B. Alvarenga
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Amanda L. Rezende
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Benner G. Alves
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Kele A. Alves
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Gustavo D. A. Gastal
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
- Instituto Nacional de Investigación Agropecuaria, Estación Experimental INIA La Estanzuela, Colonia, Uruguay
| | - Melba O. Gastal
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Eduardo L. Gastal
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, United States of America
- * E-mail:
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Chen T, Zhang Y, Dong Y, Zhang D, Xia L, Sun X, Li H, Han C, Wang H, Xu G. Mast cell and heparin promote adipogenesis in superficial fascia of rats. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:159024. [PMID: 34389520 DOI: 10.1016/j.bbalip.2021.159024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 07/13/2021] [Accepted: 08/03/2021] [Indexed: 10/20/2022]
Abstract
Fascial adipocytes are recently identified as a unique population of adipose cells, which have different developmental origins, anatomical locations, cytological and functional characteristics compared with subcutaneous or visceral adipocytes. Superficial fascia in rats (also in pigs but not obviously in mice) contains numbers of lineage committed preadipocytes which possess adipogenic potential in vivo. The present study aimed to investigate the physiological factors that contribute to fascial adipogenesis in rats. We detected that mast cells, adipose progenitor cells, and mature adipocytes distributed in certain fascia areas were closely associated with each other, and numerous heparin-loaded granules released from mast cells were distributed around fascial preadipocytes. The culture supernatants of rat peritoneal mast cells and RBL-2H3 mast cells contained 20-30 μg/ml of heparin, effectively activated PPAR-responsive luciferase activity, promoted mRNA and protein expressions of key adipogenic genes, and hence increased adipogenic differentiation of fascia- or epididymal adipose-derived stromal cells. Adipogenic effects of mast cell supernatants were mimicked by heparin but not by histamine or 5-hydroxytryptamine, and were antagonized by protamine sulfate. Adipogenic effects of heparin may relate to its chain length of glucosamine units, because heparin stimulated stronger adipogenesis than dalteparin and enoxaparin with relatively short chains. In rats, local administration of heparin-loaded microspheres for 30 days induced adipogenesis in local areas of superficial fascia. Our findings suggested that mast cell and its granule heparin could serve as the endogenous physiological factors to initiate and accelerate local adipogenesis in superficial fascia, or in adipose tissue with the fascia naturally embedded inside.
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Affiliation(s)
- Tongsheng Chen
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Yanfei Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Yingyue Dong
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Dandan Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Lisha Xia
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Xiaozhe Sun
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Hanxiao Li
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Chunmiao Han
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Huamin Wang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China
| | - Guoheng Xu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, and Peking University Center for Obesity and Metabolic Disease Research, Beijing 100191, China.
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