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Theys N, Episkopou H, Brenner C, Dufrane D. Mesenchymal Stem/Stromal Cells: DEVELOPMENT OF AN OFF-THE-SHELF ALLOGENEIC THERAPEUTIC PRODUCT INTENDED FOR BONE REGENERATION WITH IMMUNOSUPPRESSIVE PROPERTIES. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00180-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Schaner S, Theys N, Angrisani M, Banerjee J, Khobragade PY, Petrosyan S, Agarwal A, Chien S, Weerman B, Chakrawarty A, Chatterjee P, Madaan N, Bloom D, Lee J, Dey AB. Adherence to COVID-19 protective behaviours in India from May to December 2020: evidence from a nationally representative longitudinal survey. BMJ Open 2022; 12:e058065. [PMID: 35105601 PMCID: PMC8808317 DOI: 10.1136/bmjopen-2021-058065] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES Since the onset of the COVID-19 pandemic, behavioural interventions to reduce disease transmission have been central to public health policy worldwide. Sustaining individual protective behaviour is especially important in low-income and middle-income settings, where health systems have fewer resources and access to vaccination is limited. This study seeks to assess time trends in COVID-19 protective behaviour in India. DESIGN Nationally representative, panel-based, longitudinal study. SETTING We conducted a panel survey of Indian households to understand how the adoption of COVID-19 protective behaviours has changed over time. Our data span peaks and valleys of disease transmission over May-December 2020. PARTICIPANTS Respondents included 3719 adults from 1766 Indian households enrolled in the Harmonised Diagnostic Assessment of Dementia for the Longitudinal Ageing Study in India. ANALYSIS We used ordinary least squares regression analysis to quantify time trends in protective behaviours. RESULTS We find a 30.6 percentage point (95% CI (26.7 to 34.5); p<0.01) decline in protective behaviours related to social distancing over the observation period. Mask wearing and handwashing, in contrast, decreased by only 4.3 percentage points (95% CI (0.97 to 7.6); p<0.05) from a high base. Our conclusions are unchanged after adjusting for recorded COVID-19 caseload and nationwide COVID-19 containment policy; we also observe significant declines across socioeconomic strata spanning age, gender, education and urbanicity. CONCLUSION We argue that these changes reflect, at least in part, 'COVID-19 fatigue,' where adherence to social distancing becomes more difficult over time irrespective of the surrounding disease environment.
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Affiliation(s)
- Simone Schaner
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
- Department of Economics, University of Southern California, Los Angeles, California, USA
| | - Natalie Theys
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
| | - Marco Angrisani
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
- Department of Economics, University of Southern California, Los Angeles, California, USA
| | - Joyita Banerjee
- Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Pranali Yogiraj Khobragade
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
| | - Sarah Petrosyan
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
| | - Arunika Agarwal
- Department of Global Health and Population, Harvard TH Chan School of Public Health, Boston, Massachusetts, USA
| | - Sandy Chien
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
| | - Bas Weerman
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
| | - Avinash Chakrawarty
- Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Prasun Chatterjee
- Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Nirupam Madaan
- Department of Hospital Administration, All India Institute of Medical Sciences, New Delhi, India
| | - David Bloom
- Department of Global Health and Population, Harvard TH Chan School of Public Health, Boston, Massachusetts, USA
| | - Jinkook Lee
- Center for Economic and Social Research, University of Southern California, Los Angeles, California, USA
- Department of Economics, University of Southern California, Los Angeles, California, USA
| | - Aparajit Ballav Dey
- Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India
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De Bleye C, Fontaine M, Dumont E, Sacré PY, Hubert P, Theys N, Ziemons E. Raman imaging as a new analytical tool for the quality control of the monitoring of osteogenic differentiation in forming 3D bone tissue. J Pharm Biomed Anal 2020; 186:113319. [PMID: 32361470 DOI: 10.1016/j.jpba.2020.113319] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/09/2020] [Accepted: 04/15/2020] [Indexed: 12/20/2022]
Abstract
In this study, adipose-derived stem cells (ASCs) are used to produce 3D bone grafts. The safety and the feasibility of using these bone grafts have been already showed and quality controls are already implemented. However, a cheaper, fast and non-destructive technique is required to monitor the osteogenic differentiation process. Here, the use of Raman imaging to monitor the synthesis of the extracellular matrix and its progressive mineralization occurring during the osteogenic differentiation process is investigated for the first time on a 3D in forming bone tissue. The attention was focused on Raman bands related to this matrix belonging to phosphate, phenylalanine and hydroxyproline, which are very distinctive and intense. The kinetic of the osteogenic differentiation process was first compared between a 2D and a 3D forming bone tissue. It was observed that the kinetics of the osteogenic differentiation process is slower in 3D in forming bone tissue. In a second step, an evaluation of the reliability of the Raman imaging method was performed including a study of the influence of the harvest biopsies position on the forming 3D bone tissue. The repeatability and the specificity of this method were also demonstrated. In a last step, several batches of ASCs were cultured and analyzed in 3D at different time points using Raman imaging. From the mean Raman spectra, mineral to matrix ratios (MTMR) were determined and used to evaluate the formation of mineral deposits accompanying the extracellular matrix synthesis which is indicative of an ongoing osteogenic differentiation process. These ratios peaked between the day 35 and 49. This observation was very interesting since it corresponds to the time at which the 3D bone grafts are used for the patient surgery. To conclude, Raman imaging allowed fast acquisition and time-resolved monitoring in vitro of the mineralization of extracellular matrix during osteogenic differentiation.
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Affiliation(s)
- C De Bleye
- University of Liege (ULiege), CIRM, Vibra-Santé HUB, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, Avenue Hippocrate 15, B36, 4000 Liège, Belgium.
| | - M Fontaine
- Novadip Biosciences, Rue Grandbonpré 11, 1435 Mont-Saint-Guibert, Belgium
| | - E Dumont
- University of Liege (ULiege), CIRM, Vibra-Santé HUB, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, Avenue Hippocrate 15, B36, 4000 Liège, Belgium
| | - P-Y Sacré
- University of Liege (ULiege), CIRM, Vibra-Santé HUB, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, Avenue Hippocrate 15, B36, 4000 Liège, Belgium
| | - Ph Hubert
- University of Liege (ULiege), CIRM, Vibra-Santé HUB, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, Avenue Hippocrate 15, B36, 4000 Liège, Belgium
| | - N Theys
- Novadip Biosciences, Rue Grandbonpré 11, 1435 Mont-Saint-Guibert, Belgium
| | - E Ziemons
- University of Liege (ULiege), CIRM, Vibra-Santé HUB, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, Avenue Hippocrate 15, B36, 4000 Liège, Belgium
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Reusens B, Sparre T, Kalbe L, Bouckenooghe T, Theys N, Kruhøffer M, Orntoft TF, Nerup J, Remacle C. The intrauterine metabolic environment modulates the gene expression pattern in fetal rat islets: prevention by maternal taurine supplementation. Diabetologia 2008; 51:836-45. [PMID: 18311556 DOI: 10.1007/s00125-008-0956-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 01/11/2008] [Indexed: 01/14/2023]
Abstract
AIMS/HYPOTHESIS Events during fetal life may in critical time windows programme tissue development leading to organ dysfunction with potentially harmful consequences in adulthood such as diabetes. In rats, the beta cell mass of progeny from dams fed with a low-protein (LP) diet during gestation is decreased at birth and metabolic perturbation lasts through adulthood even though a normal diet is given after birth or after weaning. Maternal and fetal plasma taurine levels are suboptimal. Maternal taurine supplementation prevents these induced abnormalities. In this study, we aimed to reveal changes in gene expression in fetal islets affected by the LP diet and how taurine may prevent these changes. METHODS Pregnant Wistar rats were fed an LP diet (8% [wt/wt] protein) supplemented or not with taurine in the drinking water or a control diet (20% [wt/wt] protein). At 21.5 days of gestation, fetal pancreases were removed, digested and cultured for 7 days. Neoformed islets were collected and transcriptome analysis was performed. RESULTS Maternal LP diet significantly changed the expression of more than 10% of the genes. Tricarboxylic acid cycle and ATP production were highly targeted, but so too were cell proliferation and defence. Maternal taurine supplementation normalised the expression of all altered genes. CONCLUSIONS/INTERPRETATION Development of the beta cells and particularly their respiration is modulated by the intrauterine environment, which may epigenetically modify expression of the genome and programme the beta cell towards a pre-diabetic phenotype. This mis-programming by maternal LP diet was prevented by early taurine intervention.
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Affiliation(s)
- B Reusens
- Laboratoire de Biologie Cellulaire, Université catholique de Louvain, 5, Place Croix du Sud, 1348, Louvain-la-Neuve, Belgium.
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Abstract
Epidemiological studies have revealed strong relationships between poor foetal growth and subsequent development of the metabolic syndrome. Persisting effects of early malnutrition become translated into pathology, thereby determine chronic risk for developing glucose intolerance and diabetes. These epidemiological observations identify the phenomena of foetal programming without explaining the underlying mechanisms that establish the causal link. Animal models have been established and studies have demonstrated that reduction in the availability of nutrients during foetal development programs the endocrine pancreas and insulin-sensitive tissues. Whatever the type of foetal malnutrition, whether there are not enough calories or protein in food or after placental deficiency, malnourished pups are born with a defect in their beta-cell population that will never completely recover, and insulin-sensitive tissues will be definitively altered. Despite the similar endpoint, different cellular and physiological mechanisms are proposed. Hormones operative during foetal life like insulin itself, insulin-like growth factors and glucocorticoids, as well as specific molecules like taurine, or islet vascularization were implicated as possible factors amplifying the defect. The molecular mechanisms responsible for intrauterine programming of the beta cells are still elusive, but two hypotheses recently emerged: the first one implies programming of mitochondria and the second, epigenetic regulation.
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Affiliation(s)
- C Remacle
- Laboratory of Cell Biology, Institute of Life Sciences, Catholic University of Louvain, Louvain-la-Neuve, Belgium.
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