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Greene ES, Ramser A, Wideman R, Bedford M, Dridi S. Dietary inclusion of phytase and stimbiotic decreases mortality and lameness in a wire ramp challenge model in broilers. Avian Pathol 2024:1-18. [PMID: 38776101 DOI: 10.1080/03079457.2024.2359592] [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: 02/07/2024] [Accepted: 05/20/2024] [Indexed: 06/27/2024]
Abstract
RESEARCH HIGHLIGHTS Wire ramp model reproducibly induced lameness/BCO in broilers.Treatments did not affect growth, but phytase with stimbiotic significantly reduced BCO.Phytase increased circulating inositol, and wire flooring decreased bone inositol.
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Affiliation(s)
- Elizabeth S Greene
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, Arkansas, USA
| | - Alison Ramser
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, Arkansas, USA
| | - Robert Wideman
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, Arkansas, USA
| | | | - Sami Dridi
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, Arkansas, USA
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2
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Masrouri S, Esmaeili F, Tohidi M, Azizi F, Hadaegh F. Rapid decline of kidney function increases fracture risk in the general population: Insights from TLGS. Bone 2024; 179:116974. [PMID: 37981179 DOI: 10.1016/j.bone.2023.116974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/06/2023] [Accepted: 11/16/2023] [Indexed: 11/21/2023]
Abstract
BACKGROUND Although the association between Chronic Kidney Disease (CKD) and all-cause fractures was addressed in previous studies, the association between estimated glomerular filtration rate (eGFR) decline and fractures was poorly addressed. For the first time we examined the association between rapid kidney function decline (RKFD) and fracture incidence among Iranian general population. METHODS In a Tehranian community-based cohort, RKFD was defined as a 30 % decline in eGFR over 2-3 years. Cox proportional hazards models, adjusted for age, sex, current eGFR, diabetes mellitus, hypertension, dyslipidemia, current smoking, obesity status, waist circumference, prevalent cardiovascular diseases, aspirin, steroid use, education level, and marital status, were used to examine the association of RKFD with different fracture outcomes. RESULTS Among 5305 (3031 women) individuals aged ≥30 years, during the median follow-up of 9.62 years, 226 fracture events were observed. The multivariable hazard ratio of RKFD for any-fracture events, lower-extremity, and major osteoporotic fractures were 2.18 (95 % CI, 1.24-3.85), 2.32 (1.15-4.71), and 2.91 (1.29-6.58), respectively. These associations remained significant after accounting for the competing risk of death. The impact of RKFD on the development of incident all-cause fractures was not modified by gender [men: 2.64 (1.11-6.25) vs. women: 2.11 (1.00-4.47)] and according to current CKD status [without CKD: 2.34 (1.00-5.52) vs. with CKD: 2.59 (1.04-6.44)] (all P for interaction >0.5). CONCLUSIONS RKFD can increase the incidence of fractures among general population, the issue that was equally important among non-CKD individuals, emphasizing the need for early identification and management in those with rapidly declining eGFR.
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Affiliation(s)
- Soroush Masrouri
- Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farzad Esmaeili
- Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Tohidi
- Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Fereidoun Azizi
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farzad Hadaegh
- Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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3
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Hao S, Wang M, Yin Z, Jing Y, Bai L, Su J. Microenvironment-targeted strategy steers advanced bone regeneration. Mater Today Bio 2023; 22:100741. [PMID: 37576867 PMCID: PMC10413201 DOI: 10.1016/j.mtbio.2023.100741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/26/2023] [Accepted: 07/19/2023] [Indexed: 08/15/2023] Open
Abstract
Treatment of large bone defects represents a great challenge in orthopedic and craniomaxillofacial surgery. Traditional strategies in bone tissue engineering have focused primarily on mimicking the extracellular matrix (ECM) of bone in terms of structure and composition. However, the synergistic effects of other cues from the microenvironment during bone regeneration are often neglected. The bone microenvironment is a sophisticated system that includes physiological (e.g., neighboring cells such as macrophages), chemical (e.g., oxygen, pH), and physical factors (e.g., mechanics, acoustics) that dynamically interact with each other. Microenvironment-targeted strategies are increasingly recognized as crucial for successful bone regeneration and offer promising solutions for advancing bone tissue engineering. This review provides a comprehensive overview of current microenvironment-targeted strategies and challenges for bone regeneration and further outlines prospective directions of the approaches in construction of bone organoids.
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Affiliation(s)
- Shuyue Hao
- Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China
| | - Mingkai Wang
- Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China
| | - Zhifeng Yin
- Department of Orthopedics, Shanghai Zhongye Hospital, Shanghai, 201941, China
| | - Yingying Jing
- Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China
| | - Long Bai
- Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China
| | - Jiacan Su
- Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China
- Department of Orthopedic Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200444, China
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4
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Bertholet-Thomas A, Manso-Silván MA, Navas-Serrano V, Guittet C, Joukoff S, Bacchetta J, Boyer O, Rodriguez Portillo M, Granier LA. Bone mineral density and growth changes in patients with distal renal tubular acidosis after two-years treatment with a new alkalizing drug (ADV7103). Nefrologia 2023; 43:458-466. [PMID: 36529656 DOI: 10.1016/j.nefroe.2022.02.012] [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: 09/09/2021] [Accepted: 02/27/2022] [Indexed: 06/17/2023] Open
Abstract
BACKGROUND AND OBJECTIVES ADV7103 is a new prolonged-release treatment for distal renal tubular acidosis (dRTA), containing potassium citrate and potassium bicarbonate. Since acidosis may affect bone mineral contents, the effects of ADV7103 on bone mineral density (BMD) and growth in patients with dRTA over 24 months were evaluated. PATIENTS AND METHODS Thirty patients (24 paediatric patients and 6 adults) were included in an open-label extension study after a phase II/III trial. BMD, measured by densitometry, was assessed at baseline and at 24 months. Growth was evaluated throughout the study. Plasma bicarbonate, parathyroid hormone, 25-hydroxy vitamin D, 1,25-dihydroxy vitamin D, bone alkaline phosphatase, calciuria and citraturia, were also determined. Safety and treatment compliance were evaluated as well. RESULTS After 24 months of treatment with ADV7103, mean spine BMD z-score values significantly increased as compared with baseline (p=0.024). In adults, spine and whole-body densitometry z-scores showed a significant correlation with plasma bicarbonate levels (rS=0.82 and rS=0.97, respectively, p<0.005). There was an increase>0.5 units in z-scores for height and weight in 18% and 36% of the paediatric patients, respectively. With treatment, plasma bicarbonate concentration and calciuria at the different visits were normal in 69-86% and 93-96% patients, respectively. Only nine treatment-related gastrointestinal AEs of mild/moderate severity, were reported in five patients. CONCLUSIONS Two years of ADV7103 treatment improved growth and increased spine BMD. These results suggest that control of acidosis by ADV7103 treatment improves bone parameters.
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Affiliation(s)
- Aurélia Bertholet-Thomas
- Centre de Référence des Maladies Rénales Rares - Néphrogones - Hôpital Femme Mère Enfant, Hospices Civils de Lyon - Filière ORKiD, Bron, France
| | | | | | | | | | - Justine Bacchetta
- Centre de Référence des Maladies Rénales Rares - Néphrogones - Hôpital Femme Mère Enfant, Hospices Civils de Lyon - Filière ORKiD, Bron, France
| | - Olivia Boyer
- Service de Néphrologie Pédiatrique, Centre de Référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte (MARHEA), Institut Imagine, Hôpital Necker-Enfants Malades, Université de Paris, France
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5
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Kumar S, Vassallo JD, Nattamai KJ, Hassan A, Karns R, Vollmer A, Soller K, Sakk V, Sacma M, Nemkov T, D'Alessandro A, Geiger H. pH regulates hematopoietic stem cell potential via polyamines. EMBO Rep 2023; 24:e55373. [PMID: 36943011 PMCID: PMC10157373 DOI: 10.15252/embr.202255373] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 02/21/2023] [Accepted: 03/03/2023] [Indexed: 03/23/2023] Open
Abstract
Upon ex vivo culture, hematopoietic stem cells (HSCs) quickly lose potential and differentiate into progenitors. The identification of culture conditions that maintain the potential of HSCs ex vivo is therefore of high clinical interest. Here, we demonstrate that the potential of murine and human HSCs is maintained when cultivated for 2 days ex vivo at a pH of 6.9, in contrast to cultivation at the commonly used pH of 7.4. When cultivated at a pH of 6.9, HSCs remain smaller, less metabolically active, less proliferative and show enhanced reconstitution ability upon transplantation compared to HSC cultivated at pH 7.4. HSCs kept at pH 6.9 show an attenuated polyamine pathway. Pharmacological inhibition of the polyamine pathway in HSCs cultivated at pH 7.4 with DFMO mimics phenotypes and potential of HSCs cultivated at pH 6.9. Ex vivo exposure to a pH of 6.9 is therefore a positive regulator of HSC function by reducing polyamines. These findings might improve HSC short-term cultivation protocols for transplantation and gene therapy interventions.
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Affiliation(s)
- Sachin Kumar
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Jeffrey D Vassallo
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - Kalpana J Nattamai
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - Aishlin Hassan
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - Rebekah Karns
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center and University of Cincinnati, Cincinnati, OH, USA
| | | | - Karin Soller
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Vadim Sakk
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Mehmet Sacma
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Travis Nemkov
- University of Colorado Denver - Anschutz Medical Campus, Aurora, CO, USA
| | | | - Hartmut Geiger
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
- Aging Research Center, Ulm University, Ulm, Germany
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Bone mineral density and growth changes in patients with distal renal tubular acidosis after two-years treatment with a new alkalizing drug (ADV7103). Nefrologia 2022. [DOI: 10.1016/j.nefro.2022.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Dulai JS, Smith ESJ, Rahman T. Acid-sensing ion channel 3: An analgesic target. Channels (Austin) 2021; 15:94-127. [PMID: 33258401 PMCID: PMC7801124 DOI: 10.1080/19336950.2020.1852831] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 11/13/2020] [Indexed: 12/12/2022] Open
Abstract
Acid-sensing ion channel 3 (ASIC3) belongs to the epithelial sodium channel/degenerin (ENaC/DEG) superfamily. There are 7 different ASIC subunits encoded by 5 different genes. Most ASIC subunits form trimeric ion channels that upon activation by extracellular protons mediate a transient inward current inducing cellular excitability. ASIC subunits exhibit differential tissue expression and biophysical properties, and the ability of subunits to form homo- and heteromeric trimers further increases the complexity of currents measured and their pharmacological properties. ASIC3 is of particular interest, not only because it exhibits high expression in sensory neurones, but also because upon activation it does not fully inactivate: a transient current is followed by a sustained current that persists during a period of extracellular acidity, i.e. ASIC3 can encode prolonged acidosis as a nociceptive signal. Furthermore, certain mediators sensitize ASIC3 enabling smaller proton concentrations to activate it and other mediators can directly activate the channel at neutral pH. Moreover, there is a plethora of evidence using transgenic mouse models and pharmacology, which supports ASIC3 as being a potential target for development of analgesics. This review will focus on current understanding of ASIC3 function to provide an overview of how ASIC3 contributes to physiology and pathophysiology, examining the mechanisms by which it can be modulated, and highlighting gaps in current understanding and future research directions.
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Affiliation(s)
| | | | - Taufiq Rahman
- Department of Pharmacology, University of Cambridge, Cambridge, UK
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8
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Kim B, Cho YJ, Lim W. Osteoporosis therapies and their mechanisms of action (Review). Exp Ther Med 2021; 22:1379. [PMID: 34650627 PMCID: PMC8506919 DOI: 10.3892/etm.2021.10815] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/04/2021] [Indexed: 12/15/2022] Open
Abstract
Osteoporosis is a common disease that affects millions of patients worldwide and is most common in menopausal women. The main characteristics of osteoporosis are low bone density and increased risk of fractures due to deterioration of the bone architecture. Osteoporosis is a chronic disease that is difficult to treat; thus, investigations into novel effective therapeutic methods are required. A number of studies have focused on determining the most effective treatment options for this disease. There are several treatment options for osteoporosis that differ depending on the characteristics of the disease, and these include both well-established and newly developed drugs. The present review focuses on the various drugs available for osteoporosis, the associated mechanisms of action and the methods of administration.
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Affiliation(s)
- Beomchang Kim
- Laboratory of Orthopaedic Research, School of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Yong Jin Cho
- Department of Orthopaedic Surgery, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Wonbong Lim
- Laboratory of Orthopaedic Research, School of Medicine, Chosun University, Gwangju 61452, Republic of Korea
- Department of Orthopaedic Surgery, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
- Department of Premedical Sciences, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
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9
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Galchenko A, Gapparova K, Sidorova E. The influence of vegetarian and vegan diets on the state of bone mineral density in humans. Crit Rev Food Sci Nutr 2021; 63:845-861. [PMID: 34723727 DOI: 10.1080/10408398.2021.1996330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
There are so many literatures about vegetarians being less prone to chronic, noninfectious diseases, which are, however, the main cause of the decline in quality of life and mortality in developed countries.However, according to various scientific sources, vegetarian and especially vegan diets often contain less saturated fats, protein, calcium, vitamins D and B12, or long-chain ω-3 PUFAs. One of the most common pathology associated with a predominantly plant diet is osteopenia and osteoporosis. An analysis of 13 studies has shown that vegetarians and vegans are at a higher risk of reducing of bone mineral density, thereby increasing the incidence of fractures.At the same time, plant-based diets are usually richer in many other micronutrients important for bone health: vitamins C and K, carotenoids, potassium, magnesium, manganese, copper, or silicon. Moreover, with the deepening of our knowledge about the role of nutrients in the body and the features of the nutritional status of the population, the quality of vegetarian and vegan diets also increases. They are less and less prone to micronutrient deficiencies. Recent studies show that BMD, as well as the risk of osteoporotic fractures, at least in vegetarians, equaled these indicators in omnivores.
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Affiliation(s)
- Alexey Galchenko
- Department of preventive diet therapy, Federal Research Centre of Nutrition, Biotechnology and Food Safety, Moscow, Russian Federation.,Department of Medical Elementology, Peoples' Friendship University of Russia (RUDN University), Moscow, Russian Federation
| | - K Gapparova
- Department of preventive diet therapy, Federal Research Centre of Nutrition, Biotechnology and Food Safety, Moscow, Russian Federation
| | - E Sidorova
- I. M. Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russian Federation
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Abstract
Potassium is an essential nutrient that performs a vital role in cellular functions including maintaining fluid balance and osmolality of cells. Potassium balance is maintained by the kidney and the majority of ingested potassium is excreted in the urine. There is strong evidence of a negative association between dietary potassium and blood pressure, and some evidence (much of it indirect) of negative associations between dietary potassium and cardiovascular disease (particularly stroke and coronary heart disease) and kidney disease (chronic renal failure, and kidney stones). Blood pressure lowering is particularly associated with high potassium and low sodium diets. Important dietary sources of potassium include fruit and vegetables (including rice, potatoes, legumes and wholegrains), dairy products, and animal proteins. Worldwide, diets are low in potassium compared to dietary guidelines. Interventions focused on increasing dietary potassium will have major benefits including improvements in diet, reducing non-communicable disease and enhancing planetary health.
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Affiliation(s)
- Rachael Mira McLean
- Department of Preventive & Social Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand.
| | - Nan Xin Wang
- Department of Preventive & Social Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
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Perut F, Graziani G, Columbaro M, Caudarella R, Baldini N, Granchi D. Citrate Supplementation Restores the Impaired Mineralisation Resulting from the Acidic Microenvironment: An In Vitro Study. Nutrients 2020; 12:E3779. [PMID: 33317151 PMCID: PMC7763163 DOI: 10.3390/nu12123779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/30/2020] [Accepted: 12/04/2020] [Indexed: 12/25/2022] Open
Abstract
Chronic metabolic acidosis leads to bone-remodelling disorders based on excessive mineral matrix resorption and inhibition of bone formation, but also affects the homeostasis of citrate, which is an essential player in maintaining the acid-base balance and in driving the mineralisation process. This study aimed to investigate the impact of acidosis on the osteogenic properties of bone-forming cells and the effects of citrate supplementation in restoring the osteogenic features impaired by the acidic milieu. For this purpose, human mesenchymal stromal cells were cultured in an osteogenic medium and the extracellular matrix mineralisation was analysed at the micro- and nano-level, both in neutral and acidic conditions and after treatment with calcium citrate and potassium citrate. The acidic milieu significantly decreased the citrate release and hindered the organisation of the extracellular matrix, but the citrate supplementation increased collagen production and, particularly calcium citrate, promoted the mineralisation process. Moreover, the positive effect of citrate supplementation was observed also in the physiological microenvironment. This in vitro study proves that the mineral matrix organisation is influenced by citrate availability in the microenvironment surrounding bone-forming cells, thus providing a biological basis for using citrate-based supplements in the management of bone-remodelling disorders related to chronic low-grade acidosis.
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Affiliation(s)
- Francesca Perut
- Biomedical Science and Technology Lab, IRCCS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy; (F.P.); (N.B.)
| | - Gabriela Graziani
- Laboratory of Nanobiotechnology, IRCCS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy;
| | - Marta Columbaro
- Electron Microscopy Platform, IRCCS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy;
| | - Renata Caudarella
- Maria Cecilia Hospital, GVM Care and Research, Via Corriera 1, 48033 Cotignola (RA), Italy;
| | - Nicola Baldini
- Biomedical Science and Technology Lab, IRCCS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy; (F.P.); (N.B.)
- Department of Biomedical and Neuromotor Sciences, Via Pupilli 1, University of Bologna, 40136 Bologna, Italy
| | - Donatella Granchi
- Biomedical Science and Technology Lab, IRCCS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy; (F.P.); (N.B.)
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12
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Gouveia PF, Mesquita-Guimarães J, Galárraga-Vinueza ME, Souza JCM, Silva FS, Fredel MC, Boccaccini AR, Detsch R, Henriques B. In-vitro mechanical and biological evaluation of novel zirconia reinforced bioglass scaffolds for bone repair. J Mech Behav Biomed Mater 2020; 114:104164. [PMID: 33243695 DOI: 10.1016/j.jmbbm.2020.104164] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/21/2020] [Accepted: 10/23/2020] [Indexed: 01/22/2023]
Abstract
Bone defects resulting from infections, tumors, or traumas represent a major health care issue. Tissue engineering has been working togehter with medicine to develop techniques to repair bone damage and increase patient's life quality. In that context, scaffolds composed of bioactive ceramics have been explored, although their poor mechanical properties restrain their clinical applications as highly porous structures. As an alternative solution, this study aimed to evaluate the mechanical properties and biological response of novel zirconia reinforced bioactive glass scaffolds (ZRBG) manufactured by the replica method. The microstructure, chemical composition, compressive strength, density, in-vitro bioactivity, and cell viability were analyzed and compared to scaffolds made of monolithic zirconia of similar architecture (45, 60 and 85 ppi). The microstructure of ZRGB scaffolds consisted of a bioactive glass matrix with dispersed zirconia particles (~33% glassy phase) and the compressive strength values (ZRBG scaffolds: 0.33 ± 0.11, 0.41 ± 0.20 and 0.48 ± 0.6 MPa; ZRBG scaffolds with extra BG coating: 0.38 ± 0.13, 0.45 ± 0.11 and 0.50 ± 0.14 MPa for 45, 60 and 80 ppi, respectively) were not statistically different from those of zirconia scaffolds (0.25 ± 0.14 MPa for 45 ppi, 0.32 ± 0.11 MPa for 60 ppi and 0.44 ± 0.07 MPa for 80 ppi). No bioactivity was exhibited by monolithic zirconia scaffolds while significant bioactive response was found for ZRBG scaffolds. The cell viability of ZRBG scaffolds in osteogenic medium was improved up to 171% over zirconia scaffolds. This work provides promosing results for further exploring this technique for implant dentistry.
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Affiliation(s)
- Paula F Gouveia
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil
| | - Joana Mesquita-Guimarães
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal
| | - María E Galárraga-Vinueza
- School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil; School of Dentistry, Universidad de las Américas (UDLA), Quito, Ecuador
| | - Júlio C M Souza
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal; School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal
| | - Filipe S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Rainer Detsch
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil.
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Papageorgiou M, Merminod F, Chevalley T, van Rietbergen B, Ferrari S, Rizzoli R, Biver E. Associations between age-related changes in bone microstructure and strength and dietary acid load in a cohort of community-dwelling, healthy men and postmenopausal women. Am J Clin Nutr 2020; 112:1120-1131. [PMID: 32678420 DOI: 10.1093/ajcn/nqaa191] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/17/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND The importance of dietary acid load (DAL) in the pathogenesis of osteoporosis is still debated. Age-related changes in bone microstructure and strength in relation to DAL remain largely unexplored. OBJECTIVES We investigated the associations between changes in areal and volumetric bone mineral density (BMD), bone microstructure and strength, fracture risk, and DAL in a prospective cohort of 65-y-old healthy men and postmenopausal women. METHODS Potential renal acid load (PRAL; mEq/d) was calculated as a DAL proxy to characterize participants' diet as alkaline (Alk-D; PRAL < -5), neutral (Neut-D; -5 ≤ PRAL ≤ 5), or acidic (Acid-D; PRAL >5). We measured areal BMD (aBMD) by DXA, and distal radius and tibia bone microstructure using high-resolution peripheral quantitative computed tomography, at baseline (n = 853) and after 6.1 ± 1.4 y (n = 708). Bone strength was estimated using finite element analyses at baseline and after 3.0 ± 0.5 y (n = 613). Prevalent and incident fractures were recorded. RESULTS The majority of the participants (59%) had an Alk-D, while 23% had a Neut-D, and 18% an Acid-D. Baseline aBMD and bone microstructure and strength did differ or were slightly better in women or men with an Acid-D versus those consuming an Alk-D or Neut-D. Indeed, women with an Acid-D had higher trabecular number (P = 0.010 vs. Alk-D; P = 0.001 vs. Neut-D), while men had higher hip and radius aBMD (P = 0.008 and 0.024 vs. Neut-D, respectively) and radius strength (P = 0.026 vs. Neut-D). Over the follow-up, women in the Acid-D group experienced lower cortical and endocortical bone loss at the radius than did the Alk-D and Neut-D groups (cortical thickness, P = 0.008 and < 0.001; trabecular area, P = 0.001 and < 0.001, respectively). No association between fractures and PRAL was observed. CONCLUSIONS These null or favourable associations between baseline values or changes in aBMD, bone microstructure and strength, and DAL in this cohort of 65-y-old healthy individuals do not support adverse DAL-mediated effects on bone. This trial was registered at http://www.isrctn.com as ISRCTN11865958.
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Affiliation(s)
- Maria Papageorgiou
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Fanny Merminod
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Thierry Chevalley
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Bert van Rietbergen
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands
| | - Serge Ferrari
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - René Rizzoli
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Emmanuel Biver
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
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Physical/Chemical Properties and Resorption Behavior of a Newly Developed Ca/P/S-Based Bone Substitute Material. MATERIALS 2020; 13:ma13163458. [PMID: 32764505 PMCID: PMC7475886 DOI: 10.3390/ma13163458] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/29/2020] [Accepted: 08/02/2020] [Indexed: 12/11/2022]
Abstract
Properly regulating the resorption rate of a resorbable bone implant has long been a great challenge. This study investigates a series of physical/chemical properties, biocompatibility and the behavior of implant resorption and new bone formation of a newly developed Ca/P/S-based bone substitute material (Ezechbone® Granule CBS-400). Experimental results show that CBS-400 is comprised majorly of HA and CSD, with a Ca/P/S atomic ratio of 54.6/39.2/6.2. After immersion in Hank’s solution for 7 days, the overall morphology, shape and integrity of CBS-400 granules remain similar to that of non-immersed samples without showing apparent collapse or disintegration. With immersion time, the pH value continues to increase to 6.55 after 7 days, and 7.08 after 14 days. Cytotoxicity, intracutaneous reactivity and skin sensitization tests demonstrate the good biocompatibility features of CBS-400. Rabbit implantation/histological observations indicate that the implanted granules are intimately bonded to the surrounding new bone at all times. The implant is not merely a degradable bone substitute, but its resorption and the formation of new cancellous bone proceed at the substantially same pace. After implantation for 12 weeks, about 85% of the implant has been resorbed. The newly-formed cancellous bone ratio quickly increases to >40% at 4 weeks, followed by a bone remodeling process toward normal cancellous bone, wherein the new cancellous bone ratio gradually tapers down to about 30% after 12 weeks.
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15
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Moldero IL, Chandra A, Cavo M, Mota C, Kapsokalyvas D, Gigli G, Moroni L, Del Mercato LL. Probing the pH Microenvironment of Mesenchymal Stromal Cell Cultures on Additive-Manufactured Scaffolds. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002258. [PMID: 32656904 DOI: 10.1002/smll.202002258] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/05/2020] [Indexed: 05/22/2023]
Abstract
Despite numerous advances in the field of tissue engineering and regenerative medicine, monitoring the formation of tissue regeneration and its metabolic variations during culture is still a challenge and mostly limited to bulk volumetric assays. Here, a simple method of adding capsules-based optical sensors in cell-seeded 3D scaffolds is presented and the potential of these sensors to monitor the pH changes in space and time during cell growth is demonstrated. It is shown that the pH decreased over time in the 3D scaffolds, with a more prominent decrease at the edges of the scaffolds. Moreover, the pH change is higher in 3D scaffolds compared to monolayered 2D cell cultures. The results suggest that this system, composed by capsules-based optical sensors and 3D scaffolds with predefined geometry and pore architecture network, can be a suitable platform for monitoring pH variations during 3D cell growth and tissue formation. This is particularly relevant for the investigation of 3D cellular microenvironment alterations occurring both during physiological processes, such as tissue regeneration, and pathological processes, such as cancer evolution.
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Affiliation(s)
- Ivan Lorenzo Moldero
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, 6229ER, The Netherlands
| | - Anil Chandra
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Campus Ecotekne, via Monteroni, Lecce, 73100, Italy
| | - Marta Cavo
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Campus Ecotekne, via Monteroni, Lecce, 73100, Italy
| | - Carlos Mota
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, 6229ER, The Netherlands
| | - Dimitrios Kapsokalyvas
- Department of Molecular Cell Biology, Maastricht University Medical Center, UNS 50, Maastricht, 6229ER, The Netherlands
| | - Giuseppe Gigli
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Campus Ecotekne, via Monteroni, Lecce, 73100, Italy
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, via Arnesano, Lecce, 73100, Italy
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, 6229ER, The Netherlands
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Campus Ecotekne, via Monteroni, Lecce, 73100, Italy
| | - Loretta L Del Mercato
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Campus Ecotekne, via Monteroni, Lecce, 73100, Italy
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16
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Wang M, Xia F, Wei Y, Wei X. Molecular mechanisms and clinical management of cancer bone metastasis. Bone Res 2020; 8:30. [PMID: 32793401 PMCID: PMC7391760 DOI: 10.1038/s41413-020-00105-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/03/2019] [Accepted: 10/23/2019] [Indexed: 02/05/2023] Open
Abstract
As one of the most common metastatic sites of malignancies, bone has a unique microenvironment that allows metastatic tumor cells to grow and flourish. The fenestrated capillaries in the bone, bone matrix, and bone cells, including osteoblasts and osteoclasts, together maintain the homeostasis of the bone microenvironment. In contrast, tumor-derived factors act on bone components, leading to subsequent bone resorption or excessive bone formation. The various pathways involved also provide multiple targets for therapeutic strategies against bone metastases. In this review, we summarize the current understanding of the mechanism of bone metastases. Based on the general process of bone metastases, we specifically highlight the complex crosstalk between tumor cells and the bone microenvironment and the current management of cancer bone metastases.
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Affiliation(s)
- Manni Wang
- Laboratory of Aging Research and Cancer Drug Targets, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan P.R. China
| | - Fan Xia
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan P.R. China
| | - Yuquan Wei
- Laboratory of Aging Research and Cancer Drug Targets, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan P.R. China
| | - Xiawei Wei
- Laboratory of Aging Research and Cancer Drug Targets, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan P.R. China
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17
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Chindamo G, Sapino S, Peira E, Chirio D, Gonzalez MC, Gallarate M. Bone Diseases: Current Approach and Future Perspectives in Drug Delivery Systems for Bone Targeted Therapeutics. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E875. [PMID: 32370009 PMCID: PMC7279399 DOI: 10.3390/nano10050875] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/16/2020] [Accepted: 04/19/2020] [Indexed: 12/14/2022]
Abstract
Bone diseases include a wide group of skeletal-related disorders that cause mobility limitations and mortality. In some cases, e.g., in osteosarcoma (OS) and metastatic bone cancer, current treatments are not fully effective, mainly due to low patient compliance and to adverse side effects. To overcome these drawbacks, nanotechnology is currently under study as a potential strategy allowing specific drug release kinetics and enhancing bone regeneration. Polymers, ceramics, semiconductors, metals, and self-assembled molecular complexes are some of the most used nanoscale materials, although in most cases their surface properties need to be tuned by chemical or physical reactions. Among all, scaffolds, nanoparticles (NPs), cements, and hydrogels exhibit more advantages than drawbacks when compared to other nanosystems and are therefore the object of several studies. The aim of this review is to provide information about the current therapies of different bone diseases focusing the attention on new discoveries in the field of targeted delivery systems. The authors hope that this paper could help to pursue further directions about bone targeted nanosystems and their application for bone diseases and bone regeneration.
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Affiliation(s)
- Giulia Chindamo
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy; (G.C.); (E.P.); (D.C.); (M.G.)
| | - Simona Sapino
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy; (G.C.); (E.P.); (D.C.); (M.G.)
| | - Elena Peira
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy; (G.C.); (E.P.); (D.C.); (M.G.)
| | - Daniela Chirio
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy; (G.C.); (E.P.); (D.C.); (M.G.)
| | - Mónica Cristina Gonzalez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata 1900, Argentina;
| | - Marina Gallarate
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy; (G.C.); (E.P.); (D.C.); (M.G.)
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18
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Piotrowska K, Zgutka K, Kupnicka P, Chlubek D, Pawlik A, Baranowska-Bosiacka I. Analysis of Bone Mineral Profile After Prolonged Every-Other-Day Feeding in C57BL/6J Male and Female Mice. Biol Trace Elem Res 2020; 194:177-183. [PMID: 31175634 PMCID: PMC6987084 DOI: 10.1007/s12011-019-01758-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/21/2019] [Indexed: 12/25/2022]
Abstract
Intermitted fasting or every-other-day feeding (EOD) has many positive effects in rodents and humans. Our goal was to describe how EOD influences bone mineral composition in female and male mice under prolonged EOD feeding. Male and female adult mice were fed EOD for 9 months. After this time, we used a direct method of measurement of mineral components in ashes of long bones (humerus and radius) to estimate the content of calcium (Ca), phosphorus (P), potassium (K), magnesium (Mg), and sodium (Na). We also performed histological analysis of sections of long bones. We found no significant changes in mineral composition between ad libitum and EOD fed males and females. We noted higher Ca and P contents in control males vs. females and lower content of Mg in control males vs. females. We observed the presence of marrow adipose tissue (MAT) in sections of EOD-fed females. EOD without supplementation during feeding days did not increase loss of mineral content of bones in C57BL/6J mice, but the presence of MAT only in EOD females indicates a gender-dependent response to EOD treatment in C57BL/6J mice.
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Affiliation(s)
- Katarzyna Piotrowska
- Department of Physiology, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland.
| | - Katarzyna Zgutka
- Department of Physiology, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland
| | - Patrycja Kupnicka
- Department of Biochemistry, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland
| | - Dariusz Chlubek
- Department of Biochemistry, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry, Pomeranian Medical University in Szczecin, al. Powstańców Wielkopolskich 72, 70-111, Szczecin, Poland
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19
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Ma R, Wang W, Yang P, Wang C, Guo D, Wang K. In vitro antibacterial activity and cytocompatibility of magnesium-incorporated poly(lactide-co-glycolic acid) scaffolds. Biomed Eng Online 2020; 19:12. [PMID: 32070352 PMCID: PMC7029519 DOI: 10.1186/s12938-020-0755-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 02/10/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bone defects are often combined with the risk of infection in the clinic, and artificial bone substitutes are often implanted to repair the defective bone. However, the implant materials are carriers for bacterial growth, and biofilm can form on the implant surface, which is difficult to eliminate using antibiotics and the host immune system. Magnesium (Mg) was previously reported to possess antibacterial potential. METHODS In this study, Mg was incorporated into poly(lactide-co-glycolic acid) (PLGA) to fabricate a PLGA/Mg scaffold using a low-temperature rapid-prototyping technique. All scaffolds were divided into three groups: PLGA (P), PLGA/10 wt% Mg with low Mg content (PM-L) and PLGA/20 wt% Mg with high Mg content (PM-H). The degradation test of the scaffolds was conducted by immersing them into the trihydroxymethyl aminomethane-hydrochloric acid (Tris-HCl) buffer solution and measuring the change of pH values and concentrations of Mg ions. The antibacterial activity of the scaffolds was investigated by the spread plate method, tissue culture plate method, scanning electron microscopy and confocal laser scanning microscopy. Additionally, the cell attachment and proliferation of the scaffolds were evaluated by the cell counting kit-8 (CCK-8) assay using MC3T3-E1 cells. RESULTS The Mg-incorporated scaffolds degraded and released Mg ions and caused an increase in the pH value. Both PM-L and PM-H inhibited bacterial growth and biofilm formation, and PM-H exhibited higher antibacterial activity than PM-L after incubation for 24 and 48 h. Cell tests revealed that PM-H exerted a suppressive effect on cell attachment and proliferation. CONCLUSIONS These findings demonstrated that the PLGA/Mg scaffolds possessed favorable antibacterial activity, and a higher content of Mg (20%) exhibited higher antibacterial activity and inhibitory effects on cell attachment and proliferation than low Mg content (10%).
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Affiliation(s)
- Rui Ma
- Department of Bone and Joint Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Wei Wang
- Department of Bone and Joint Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Pei Yang
- Department of Bone and Joint Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Chunsheng Wang
- Department of Bone and Joint Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Dagang Guo
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shanxi, China
| | - Kunzheng Wang
- Department of Bone and Joint Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China.
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20
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Grosfeld EC, Smith BT, Santoro M, Lodoso-Torrecilla I, Jansen JA, Ulrich DJ, Melchiorri AJ, Scott DW, Mikos AG, van den Beucken JJJP. Fast dissolving glucose porogens for early calcium phosphate cement degradation and bone regeneration. ACTA ACUST UNITED AC 2020; 15:025002. [PMID: 31810074 DOI: 10.1088/1748-605x/ab5f9c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Here, we demonstrate the in vivo efficacy of glucose microparticles (GMPs) to serve as porogens within calcium phosphate cements (CPCs) to obtain a fast-degrading bone substitute material. Composites were fabricated incorporating 20 wt% GMPs at two different GMP size ranges (100-150 μm (GMP-S) and 150-300 μm (GMP-L)), while CPC containing 20 wt% poly(lactic-co-glycolic acid) microparticles (PLGA) and plain CPC served as controls. After 2 and 8 weeks implantation in a rat femoral condyle defect model, specimens were retrieved and analyzed for material degradation and bone formation. Histologically, no adverse tissue response to any of the CPC-formulations was observed. All CPC-porogen formulations showed faster degradation compared to plain CPC control, but only GMP-containing formulations showed higher amounts of new bone formation compared to plain CPC controls. After 8 weeks, only CPC-porogen formulations with GMP-S or PLGA porogens showed higher degradation compared to plain CPC controls. Overall, the inclusion of GMPs into CPCs resulted in a macroporous structure that initially accelerated the generation of new bone. These findings highlight the efficacy of a novel approach that leverages simple porogen properties to generate porous CPCs with distinct degradation and bone regeneration profiles.
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Affiliation(s)
- Eline-Claire Grosfeld
- Radboudumc, Dentistry-Biomaterials, Philips van Leijdenlaan 25, 6525EX Nijmegen, The Netherlands
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21
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Kim HJ, Kang E, Ryu H, Han M, Lee KB, Kim YS, Sung S, Ahn C, Oh KH. Metabolic acidosis is associated with pulse wave velocity in chronic kidney disease: Results from the KNOW-CKD Study. Sci Rep 2019; 9:16139. [PMID: 31695082 PMCID: PMC6834555 DOI: 10.1038/s41598-019-52499-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 10/18/2019] [Indexed: 12/22/2022] Open
Abstract
Metabolic acidosis is common in chronic kidney disease (CKD) and may have various deleterious consequences. Arterial stiffness in CKD patients is associated with poor cardiovascular outcomes. The present study aimed to evaluate the association between serum bicarbonate and arterial stiffness using the baseline cross-sectional data set of a large-scale Korean CKD cohort. 2,238 CKD patients were enrolled in the KoreaN Cohort Study for Outcome in Patients With Chronic Kidney Disease (KNOW-CKD) from 2011 to 2016. The present study was conducted on 1,659 patients included in this cohort with baseline serum bicarbonate and brachial-to-ankle pulse wave velocity (baPWV) data. Metabolic acidosis was defined as a serum bicarbonate level of <22 mmol/L, and baPWV was used as a surrogate of arterial stiffness. Mean serum bicarbonate was 25.8 ± 3.6 mmol/L. 210 (12.7%) patients had metabolic acidosis. baPWV was significantly higher in patients with metabolic acidosis (P < 0.001) and showed a significant inverse correlation with serum bicarbonate (Unstandardized β −16.0 cm/sec; 95% CI −20.5, −11.4; P < 0.001) in an unadjusted model, which was retained after adjustment (Unstandardized β −5.4 cm/sec; 95% CI −9.9, −1.0; P = 0.017). Metabolic acidosis was found to be associated with a high baPWV in pre-dialysis CKD patients.
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Affiliation(s)
- Hyo Jin Kim
- Department of Internal Medicine, Pusan National University Hospital, Busan, Korea
| | - Eunjeong Kang
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hyunjin Ryu
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Miyeun Han
- Department of Internal Medicine, Pusan National University Hospital, Busan, Korea
| | - Kyu-Beck Lee
- Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yong-Soo Kim
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Suah Sung
- Department of Internal Medicine, Eulji Medical Center, Eulji University, Seoul, Korea
| | - Curie Ahn
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kook-Hwan Oh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea. .,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
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22
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Pezzotti G, Adachi T, Boschetto F, Zhu W, Zanocco M, Marin E, Bal BS, McEntire BJ. Off-Stoichiometric Reactions at the Cell-Substrate Biomolecular Interface of Biomaterials: In Situ and Ex Situ Monitoring of Cell Proliferation, Differentiation, and Bone Tissue Formation. Int J Mol Sci 2019; 20:E4080. [PMID: 31438530 PMCID: PMC6751500 DOI: 10.3390/ijms20174080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/15/2019] [Accepted: 08/17/2019] [Indexed: 11/18/2022] Open
Abstract
The availability of osteoinductive biomaterials has encouraged new therapies in bone regeneration and has potentially triggered paradigmatic shifts in the development of new implants in orthopedics and dentistry. Among several available synthetic biomaterials, bioceramics have gained attention for their ability to induce mesenchymal cell differentiation and successive bone formation when implanted in the human body. However, there is currently a lack of understanding regarding the fundamental biochemical mechanisms by which these materials can induce bone formation. Phenomenological studies of retrievals have clarified the final effect of bone formation, but have left the chemical interactions at the cell-material interface uncharted. Accordingly, the knowledge of the intrinsic material properties relevant for osteoblastogenesis and osteoinduction remains incomplete. Here, we systematically monitored in vitro the chemistry of mesenchymal cell metabolism and the ionic exchanges during osteoblastogenesis on selected substrates through conventional biological assays as well as via in situ and ex situ spectroscopic techniques. Accordingly, the chemical behavior of different bioceramic substrates during their interactions with mesenchymal cells could be unfolded and compared with that of biomedical titanium alloy. Our goal was to clarify the cascade of chemical equations behind the biological processes that govern osteoblastogenic effects on different biomaterial substrates.
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Affiliation(s)
- Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan.
- Department of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.
- The Center for Advanced Medical Engineering and Informatics, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0854, Japan.
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan.
| | - Tetsuya Adachi
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Francesco Boschetto
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Wenliang Zhu
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
| | - Matteo Zanocco
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - B Sonny Bal
- SINTX Technologies Corporation, 1885 West 2100 South, Salt Lake City, UT 84119, USA
| | - Bryan J McEntire
- SINTX Technologies Corporation, 1885 West 2100 South, Salt Lake City, UT 84119, USA
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23
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Liu W, Dan X, Lu WW, Zhao X, Ruan C, Wang T, Cui X, Zhai X, Ma Y, Wang D, Huang W, Pan H. Spatial Distribution of Biomaterial Microenvironment pH and Its Modulatory Effect on Osteoclasts at the Early Stage of Bone Defect Regeneration. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9557-9572. [PMID: 30720276 DOI: 10.1021/acsami.8b20580] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
It is generally accepted that biodegradable materials greatly influence the nearby microenvironment where cells reside; however, the range of interfacial properties has seldom been discussed due to technical bottlenecks. This study aims to depict biomaterial microenvironment boundaries by correlating interfacial H+ distribution with surrounding cell behaviors. Using a disuse-related osteoporotic mouse model, we confirmed that the abnormal activated osteoclasts could be suppressed under relatively alkaline conditions. The differentiation and apatite-resorption capability of osteoclasts were "switched off" when cultured in titrated material extracts with pH values higher than 7.8. To generate a localized alkaline microenvironment, a series of borosilicates were fabricated and their interfacial H+ distributions were monitored spatiotemporally by employing noninvasive microtest technology. By correlating interfacial H+ distribution with osteoclast "switch on/off" behavior, the microenvironment boundary of the tested material was found to be 400 ± 50 μm, which is broader than the generally accepted value, 300 μm. Furthermore, osteoporotic mice implanted with materials with higher interfacial pH values and boarder effective ranges had lower osteoclast activities and a thicker new bone. To conclude, effective proton microenvironment boundaries of degradable biomaterials were depicted and a weak alkaline microenvironment was shown to promote regeneration of osteoporotic bones possibly by suppressing abnormal activated osteoclasts.
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Affiliation(s)
- Wenlong Liu
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
| | - Xiuli Dan
- School of Biomedical Sciences, Faculty of Medicine , The Chinese University of Hong Kong , 999077 Hong Kong , China
| | - William W Lu
- Department of Orthopaedics and Traumatology, Faculty of Medicine , The University of Hong Kong , 999077 Hong Kong , China
| | - Xiaoli Zhao
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
| | - Changshun Ruan
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
| | - Ting Wang
- Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, Department of Orthopaedics , The University of Hong Kong-Shenzhen Hospital, University of Hong Kong , Shenzhen 518053 , China
| | - Xu Cui
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
| | - Xinyun Zhai
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
- Department of Orthopaedics and Traumatology, Faculty of Medicine , The University of Hong Kong , 999077 Hong Kong , China
| | - Yufei Ma
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
| | - Deping Wang
- Institute of Bioengineering and Information Technology Materials, School of Materials Science and Engineering , Tongji University , Shanghai 200092 , China
| | - Wenhai Huang
- Institute of Bioengineering and Information Technology Materials, School of Materials Science and Engineering , Tongji University , Shanghai 200092 , China
| | - Haobo Pan
- Research Center for Human Tissue and Organs Degeneration, Institute of Biomedicine and Biotechnology , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , China
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Frings-Meuthen P, Bernhardt G, Buehlmeier J, Baecker N, May F, Heer M. The negative effect of unloading exceeds the bone-sparing effect of alkaline supplementation: a bed rest study. Osteoporos Int 2019; 30:431-439. [PMID: 30255228 DOI: 10.1007/s00198-018-4703-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 09/04/2018] [Accepted: 09/11/2018] [Indexed: 10/28/2022]
Abstract
UNLABELLED Potassium bicarbonate was administrated to an already alkaline diet in seven male subjects during a 21-day bed rest study and was able to decrease bed rest induced increased calcium excretion but failed to prevent bed rest-induced bone resorption. INTRODUCTION Supplementation with alkali salts appears to positively influence calcium and bone metabolism and, thus, could be a countermeasure for population groups with an increased risk for bone loss. However, the extent to which alkalization counteracts acid-induced bone resorption or whether it merely has a calcium and bone maintenance effect is still not completely understood. In the present study, we hypothesized that additional alkalization to an already alkaline diet can further counteract bed rest-induced bone loss. METHODS Seven healthy male subjects completed two parts of a crossover designed 21-day bed rest study: bed rest only (control) and bed rest supplemented with 90 mmol potassium bicarbonate (KHCO3) daily. RESULTS KHCO3supplementation during bed rest resulted in a more alkaline status compared to the control intervention, demonstrated by the increase in pH and buffer capacity level (pH p = 0.023, HCO3p = 0.02, ABE p = 0.03). Urinary calcium excretion was decreased during KHCO3 supplementation (control 6.05 ± 2.74 mmol/24 h; KHCO3 4.87 ± 2.21 mmol/24 h, p = 0.03); whereas, bone formation was not affected by additional alkalization (bAP p = 0.58; PINP p = 0.60). Bone resorption marker UCTX tended to be lower during alkaline supplementation (UCTX p = 0.16). CONCLUSIONS The more alkaline acid-base status, achieved by KHCO3 supplementation, reduced renal calcium excretion during bed rest, but was not able to prevent immobilization-induced bone resorption. However, advantages of alkaline salts on bone metabolism may occur under acidic metabolic conditions or with respect to the positive effect of reduced calcium excretion within a longer time frame. TRIAL REGISTRATION Trial number: NCT01509456.
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Affiliation(s)
- P Frings-Meuthen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany.
| | - G Bernhardt
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany
- Novartis AG, Basel, Switzerland
| | - J Buehlmeier
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany
- University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - N Baecker
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany
- Department of Nutrition and Food Science, University of Bonn, Bonn, Germany
| | - F May
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany
| | - M Heer
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147, Cologne, Germany
- Department of Nutrition and Food Science, University of Bonn, Bonn, Germany
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Baldini N, Avnet S. The Effects of Systemic and Local Acidosis on Insulin Resistance and Signaling. Int J Mol Sci 2018; 20:ijms20010126. [PMID: 30598026 PMCID: PMC6337415 DOI: 10.3390/ijms20010126] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/12/2018] [Accepted: 12/23/2018] [Indexed: 12/14/2022] Open
Abstract
Most pathological conditions that cause local or systemic acidosis by overcoming the buffering activities of body fluids overlap with those diseases that are characterized by glucose metabolic disorders, including diabetes mellitus, inflammation, and cancer. This simple observation suggests the existence of a strong relationship between acidosis and insulin metabolism or insulin receptor signaling. In this review, we summarized the current knowledge on the activity of insulin on the induction of acidosis and, vice versa, on the effects of changes of extracellular and intracellular pH on insulin resistance. Insulin influences acidosis by promoting glycolysis. Although with an unclear mechanism, the lowering of pH, in turn, inhibits insulin sensitivity or activity. In addition to ketoacidosis that is frequently associated with diabetes, other important and more complex factors are involved in this delicate feedback mechanism. Among these, in this review we discussed the acid-mediated inhibiting effects on insulin binding affinity to its receptor, on glycolysis, on the recycling of glucose transporters, and on insulin secretion via transforming growth factor β (TGF-β) activity by pancreatic β-cells. Finally, we revised current data available on the mutual interaction between insulin signaling and the activity of ion/proton transporters and pH sensors, and on how acidosis may enhance insulin resistance through the Nuclear Factor kappa B (NF-κB) inflammatory pathway.
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Affiliation(s)
- Nicola Baldini
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli IRCCS, 40136 Bologna, Italy.
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 401223 Bologna, Italy.
| | - Sofia Avnet
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli IRCCS, 40136 Bologna, Italy.
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Scaffolds Fabricated from Natural Polymers/Composites by Electrospinning for Bone Tissue Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:49-78. [DOI: 10.1007/978-981-13-0950-2_4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Lin Z, Wu J, Qiao W, Zhao Y, Wong KH, Chu PK, Bian L, Wu S, Zheng Y, Cheung KM, Leung F, Yeung KW. Precisely controlled delivery of magnesium ions thru sponge-like monodisperse PLGA/nano-MgO-alginate core-shell microsphere device to enable in-situ bone regeneration. Biomaterials 2018; 174:1-16. [DOI: 10.1016/j.biomaterials.2018.05.011] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/05/2018] [Accepted: 05/05/2018] [Indexed: 12/18/2022]
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GLP2 Promotes Directed Differentiation from Osteosarcoma Cells to Osteoblasts and Inhibits Growth of Osteosarcoma Cells. MOLECULAR THERAPY. NUCLEIC ACIDS 2017; 10:292-303. [PMID: 29499942 PMCID: PMC5862135 DOI: 10.1016/j.omtn.2017.12.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 12/18/2017] [Accepted: 12/18/2017] [Indexed: 12/27/2022]
Abstract
Glucagon-like peptide 2 (GLP2) is a proglucagon-derived peptide that is involved in the regulation of energy absorption and exerts beneficial effects on glucose metabolism. However, the exact mechanisms underlying the GLP2 during osteogenic differentiation has not been illustrated. Herein, we indicated that GLP2 was demonstrated to result in positive action during the osteogenic differentiation of human osteosarcoma cells. Our findings demonstrate that GLP2 inhibis the growth of osteosarcoma cells in vivo and in vitro. Mechanistic investigations reveal GLP2 inhibits the expression and activity of nuclear factor κB (NF-κB), triggering the decrease of c-Myc, PKM2, and CyclinD1 in osteosarcoma cells. In particular, rescued NF-κB abrogates the functions of GLP2 in osteosarcoma cells. Strikingly, GLP2 overexpression significantly increased the expression of osteogenesis-associated genes (e.g., Ocn and PICP) dependent on c-Fos-BMP signaling, which promotes directed differentiation from osteosarcoma cells to osteoblasts with higher alkaline phosphatase activity. Taken together, our results suggested that GLP2 could be a valuable drug to promote directed differentiation from osteosarcoma cells to osteoblasts, which may provide potential therapeutic targets for the treatment of osteosarcoma.
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Generation of an osteoblast-based artificial niche that supports in vitro B lymphopoiesis. Exp Mol Med 2017; 49:e400. [PMID: 29170473 PMCID: PMC5704192 DOI: 10.1038/emm.2017.189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 04/27/2017] [Accepted: 05/28/2017] [Indexed: 12/13/2022] Open
Abstract
B lymphocytes are produced from hematopoietic stem cells (HSCs) through the highly ordered process of B lymphopoiesis, which is regulated by a complex network of cytokines, chemokines and cell adhesion molecules derived from the hematopoietic niche. Primary osteoblasts function as an osteoblastic niche (OBN) that supports in vitro B lymphopoiesis. However, there are significant limitations to the use of primary osteoblasts, including their relative scarcity and the consistency and efficiency of the limited purification and proliferation of these cells. Thus, development of a stable osteoblast cell line that can function as a biomimetic or artificial OBN is necessary. In this study, we developed a stable osteoblastic cell line, designated OBN4, which functions as an osteoblast-based artificial niche that supports in vitro B lymphopoiesis. We demonstrated that the production of a B220+ cell population from Lineage− (Lin−) Sca-1+ c-Kit+ hematopoietic stem and progenitor cells (HSPCs) was increased ~1.7-fold by OBN4 cells relative to production by primary osteoblasts and OP9 cells in coculture experiments. Consistently, OBN4 cells exhibited the highest production of B220+ IgM+ cell populations (6.7±0.6–13.6±0.6%) in an IL-7- and stromal cell-derived factor 1-dependent manner, with higher production than primary osteoblasts (3.7±0.5–6.4±0.6%) and OP9 cells (1.8±0.6–3.9±0.5%). In addition, the production of B220+ IgM+ IgD+ cell populations was significantly enhanced by OBN4 cells (15.4±1.1–18.9±3.2%) relative to production by primary osteoblasts (9.5±0.6–14.6±1.6%) and OP9 cells (9.1±0.5–10.3±1.8%). We conclude that OBN4 cells support in vitro B lymphopoiesis of Lin− Sca-1+ c-Kit+ HSPCs more efficiently than primary osteoblasts or OP9 stromal cells.
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Granchi D, Torreggiani E, Massa A, Caudarella R, Di Pompo G, Baldini N. Potassium citrate prevents increased osteoclastogenesis resulting from acidic conditions: Implication for the treatment of postmenopausal bone loss. PLoS One 2017; 12:e0181230. [PMID: 28715463 PMCID: PMC5513456 DOI: 10.1371/journal.pone.0181230] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 06/28/2017] [Indexed: 12/19/2022] Open
Abstract
The extracellular acidic milieu in bones results in activation of osteoclasts (OC) and inhibition of osteoblasts (OB) causing a net loss of calcium from the skeleton and the deterioration of bone microarchitecture. Alkalinization through supplementation with potassium citrate (K citrate) has been proposed to limit the osteopenia progression, even though its pharmacological activity in bone microenvironment is not well defined. We evaluated if K citrate was able to prevent the adverse effects that acidic milieu induces on bone cells. OC and OB were maintained in neutral (pH 7.4) versus acidic (pH 6.9) culture medium, and treated with different K citrate concentrations. We evaluated the OC differentiation at seven days, by counting of multinucleated cells expressing tartrate-resistant acid phosphatase, and the activity of mature OC at 14 days, by quantifying of collagen degradation. To evaluate the effects on OB, we analyzed proliferation, mineralization, and expression of bone-related genes. We found that the low pH increased OC differentiation and activity and decreased OB function. The osteoclastogenesis was also promoted by RANKL concentrations ineffective at pH 7.4. Non-cytotoxic K citrate concentrations were not sufficient to steadily neutralize the acidic medium, but a) inhibited the osteoclastogenesis, the collagen degradation, and the expression of genes involved in RANKL-mediated OC differentiation, b) enhanced OB proliferation and alkaline phosphatase expression, whereas it did not affect the in vitro mineralization, and c) were effective also in OC cultures resistant to alendronate, i.e. the positive control of osteoclastogenesis inhibition. In conclusion, K citrate prevents the increase in OC activity induced by the acidic microenvironment, and the effect does not depend exclusively on its alkalizing capacity. These data provide the biological basis for the use of K citrate in preventing the osteopenia progression resulting from low-grade acidosis.
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Affiliation(s)
- Donatella Granchi
- Orthopedic Pathophysiology and Regenerative Medicine Unit, Rizzoli Orthopedic Institute, Bologna, Italy
- * E-mail:
| | - Elena Torreggiani
- Orthopedic Pathophysiology and Regenerative Medicine Unit, Rizzoli Orthopedic Institute, Bologna, Italy
| | - Annamaria Massa
- Orthopedic Pathophysiology and Regenerative Medicine Unit, Rizzoli Orthopedic Institute, Bologna, Italy
| | | | - Gemma Di Pompo
- Orthopedic Pathophysiology and Regenerative Medicine Unit, Rizzoli Orthopedic Institute, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Nicola Baldini
- Orthopedic Pathophysiology and Regenerative Medicine Unit, Rizzoli Orthopedic Institute, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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Curneen JMG, Casey M, Laird E. The relationship between protein quantity, BMD and fractures in older adults. Ir J Med Sci 2017; 187:111-121. [PMID: 28674746 DOI: 10.1007/s11845-017-1642-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 05/26/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND Previously, no large-scale literature reviews have focussed on the relationship between dietary protein and its impact on bone mineral density (BMD) and fracture risk-as measures of bone health-in older adults and its potential impact as a primary prevention tool. AIMS The aim of this study was to assess the impact of varying dietary protein levels on bone health. METHODS A literature review of trials concerning older adults' (>50 years of age) and animals' varying protein intake in the diet and its effect on BMD (human and animal) and fracture risk (human only) was carried out. Additionally, a review of dietary assessment tools used in these studies was also analysed. RESULTS Ten out of fourteen trials assessing BMD and dietary protein quantity in humans and 3/4 in animal trials found a positive relationship between these two parameters. Four out of seven trials investigating the relationship between dietary protein quantity and fracture risk displayed a positive, protective effect of dietary protein levels on fracture risk. Sixty-two percent of studies used the Food-Frequency Questionnaire assessment method. DISCUSSION Increased protein intake in the diet is beneficial to bone health and reduces morbidity and mortality. The importance of using dietary protein, along with calcium and vitamin D, as a primary preventative strategy should be stressed, given the health and cost benefits that this would deliver, with a possible need for a higher level of protein in the diet of an elderly person than what is currently recommended.
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Affiliation(s)
- J M G Curneen
- University College Dublin, Belfield, Dublin 4, County Dublin, Ireland.
| | - M Casey
- Department of Geriatric Medicine, St James' Hospital, James' Street, Dublin 8, County Dublin, Ireland.
| | - E Laird
- Trinity College School of Biochemistry and Immunology, St James' Hospital, James' Street, Dublin 8, County Dublin, Ireland
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Di Pompo G, Lemma S, Canti L, Rucci N, Ponzetti M, Errani C, Donati DM, Russell S, Gillies R, Chano T, Baldini N, Avnet S. Intratumoral acidosis fosters cancer-induced bone pain through the activation of the mesenchymal tumor-associated stroma in bone metastasis from breast carcinoma. Oncotarget 2017; 8:54478-54496. [PMID: 28903357 PMCID: PMC5589596 DOI: 10.18632/oncotarget.17091] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 03/19/2017] [Indexed: 12/31/2022] Open
Abstract
Cancer-induced bone pain (CIBP) is common in patients with bone metastases (BM), significantly impairing quality of life. The current treatments for CIBP are limited since they are often ineffective. Local acidosis derived from glycolytic carcinoma and tumor-induced osteolysis is only barely explored cause of pain. We found that breast carcinoma cells that prefer bone as a metastatic site have very high extracellular proton efflux and expression of pumps/ion transporters associated with acid-base balance (MCT4, CA9, and V-ATPase). Further, the impairment of intratumoral acidification via V-ATPase targeting in xenografts with BM significantly reduced CIBP, as measured by incapacitance test. We hypothesize that in addition to the direct acid-induced stimulation of nociceptors in the bone, a novel mechanism mediated by the acid-induced and tumor-associated mesenchymal stroma might ultimately lead to nociceptor sensitization and hyperalgesia. Consistent with this, short-term exposure of cancer-associated fibroblasts, mesenchymal stem cells, and osteoblasts to pH 6.8 promotes the expression of inflammatory and nociceptive mediators (NGF, BDNF, IL6, IL8, IL1b and CCL5). This is also consistent with a significant correlation between breakthrough pain, measured by pain questionnaire, and combined high serum levels of BDNF and IL6 in patients with BM, and also by immunofluorescence staining showing IL8 expression that was more in mesenchymal stromal cells rather than in tumors cells, and close to LAMP-2 positive acidifying carcinoma cells in BM tissue sections. In summary, intratumoral acidification in BM might promote CIBP also by activating the tumor-associated stroma, offering a new target for palliative treatments in advanced cancer.
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Affiliation(s)
- Gemma Di Pompo
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli, Bologna, Italy.,Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Silvia Lemma
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli, Bologna, Italy.,Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Lorenzo Canti
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Nadia Rucci
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Marco Ponzetti
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Costantino Errani
- Orthopaedic Oncology Surgical Unit, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Davide Maria Donati
- Orthopaedic Oncology Surgical Unit, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Shonagh Russell
- Department of Imaging Research, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Robert Gillies
- Department of Imaging Research, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Tokuhiro Chano
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Nicola Baldini
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli, Bologna, Italy.,Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Sofia Avnet
- Orthopaedic Pathophysiology and Regenerative Medicine Unit, Istituto Ortopedico Rizzoli, Bologna, Italy
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Darriet C, Axe DE, Crenshaw TD. Acidogenic mineral additions increased Ca mobilization in prepartum sows. J Anim Sci 2017; 95:212-225. [PMID: 28177393 DOI: 10.2527/jas.2016.0859] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Increased sow milk production is associated with an increase in unexplained sow mortality during prepartum and early postpartum periods. This association has led to purported claims of hypocalcemic disorders. Assuming similar responses as dairy cows, feeding anionic mineral salts in late gestation and early lactation may reduce potential hypocalcemia related disorders in sows. Two experiments using CAD-MATE (Granco Minerals, Petersburg, VA), an acidogenic mineral supplement (AMS), were designed to determine the amount required to increase urinary Ca excretion and to identify renal compensatory responses to acid loads in sows. In Exp. 1, 30 multiparous gestating sows (Landrace × Large White) were fed 1 of 6 diets with either 0, 0.5, 1.0, 1.5, 2.0, or 2.5% AMS additions for 14 d. Diets provided a range (33 to -216 mEq/kg) of cation-anion balance, calculated as Na + K - Cl - S. Two 24-h urine samples were collected via bladder catheters for mineral analysis. One venous blood sample was drawn from 2 sows per diet on d 14. In Exp. 2, twelve sows were fed 1 of 3 diets to provide either 0, 1.5, or 2.5% AMS. Three 24-h composites of urine and fecal excreta were collected and analyses were used to calculate apparent mineral retention. Venous blood pH (range 7.41 to 7.33) and base excess (range 5.4 to 0.5 mmol/L) decreased (linear, < 0.10), but blood ionized Ca (range 1.28 to 1.37 mmol/L) increased (linear, < 0.05) proportionally to dietary AMS additions. Blood anion gap was not affected by diet. Urine pH decreased (linear, < 0.10) with additions of AMS (range 7.47 to 5.52). In Exp. 2, urinary SO (range 134 to 396 mEq/d) and NH (range 84 to 323 mEq/d) excretion increased ( < 0.05) with AMS additions. Urinary Mg, Na, and K excretion did not differ among treatments. Fecal excretion of Ca, Mg, and P increased ( < 0.05) in sows fed diets with 2.5% AMS. Fecal K, Na, and Cl excretion did not differ among treatments. Apparent Ca retention decreased ( < 0.05) with AMS additions, but apparent Mg and Cl retention increased ( < 0.05). In conclusion, AMS induced a renal compensated acid load as exhibited by urinary ion excretion patterns and maintenance of blood gas values within physiological ranges. Feeding diets with 1.5 or 2.5% AMS increased urinary and fecal Ca excretion and decreased apparent Ca retention implying an increase in mobilization of body Ca pools in prepartum sows.
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Van der Veen G, Fosgate GT, Botha FK, Meissner HH, Jacobs L, Prozesky L. Response of cattle with clinical osteochondrosis to mineral supplementation. Onderstepoort J Vet Res 2017; 84:e1-e6. [PMID: 28281772 PMCID: PMC6238688 DOI: 10.4102/ojvr.v84i1.1365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/21/2016] [Accepted: 11/25/2016] [Indexed: 11/01/2022] Open
Abstract
Since 1982, farmers in the North West province and other parts of South Africa have noticed an increase in the incidence of lameness in cattle. Macro- and microscopical lesions of joints resembled osteochondrosis. Pre-trial data indicated that cattle with osteochondrotic lesions recovered almost completely when fed a supplement containing bio-available micro- and macrominerals of high quality. In the present trial, 43 clinically affected cattle of varying ages (1-5 years) and sexes were randomly divided into three groups. Each group was fed the same commercial supplement base with differing micro- and macromineral concentrations to determine the effect of mineral concentrations on the recovery from osteochondrosis. Both supplements 1 and 2 contained 25% of the recommended National Research Council (NRC) mineral values. Additional phosphate was added to supplement 2. Supplement 3, containing 80% of the NRC mineral values, was used as the control. Results from all three groups indicated no recovery from osteochondrosis. Urine pH of a small sample of the test cattle showed aciduria (pH < 6). Supplement analysis revealed addition of ammonium sulphate that contributed sulphate and nitrogen to the supplement. Supplementary dietary cation anion difference (DCAD) values were negative at -411 mEq/kg, -466 mEq/kg and -467 mEq/kg for supplements 1, 2 and 3, respectively, whereas the pre-trial supplement was calculated at +19.87 mEq/kg. It was hypothesised that feeding a low (negative) DCAD diet will predispose growing cattle to the development of osteochondrosis or exacerbate subclinical or clinical osteochondrosis in cattle.
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David C, Bover J, Voiculet C, Peride I, Petcu LC, Niculae A, Covic A, Checherita IA. Coronary risk score for mineral bone disease in chronic non-diabetic hemodialysis patients: results from a prospective pilot study. Int Urol Nephrol 2016; 49:689-700. [DOI: 10.1007/s11255-016-1481-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 12/07/2016] [Indexed: 12/27/2022]
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Marcoline FV, Ishida Y, Mindell JA, Nayak S, Grabe M. A mathematical model of osteoclast acidification during bone resorption. Bone 2016; 93:167-180. [PMID: 27650914 PMCID: PMC5077641 DOI: 10.1016/j.bone.2016.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 08/16/2016] [Accepted: 09/09/2016] [Indexed: 12/01/2022]
Abstract
Bone resorption by osteoclasts occurs through the creation of a sealed extracellular compartment (ECC), or pit, adjacent to the bone that is subsequently acidified through a complex biological process. The low pH of the pit dissolves the bone mineral and activates acid proteases that further break down the bone matrix. There are many ion channels, transporters, and soluble proteins involved in osteoclast mediated resorption, and in the past few years, there has been an increased understanding of the identity and properties of some key proteins such as the ClC-7 Cl-/H+ antiporter and the HV1 proton channel. Here we present a detailed mathematical model of osteoclast acidification that includes the influence of many of the key regulatory proteins. The primary enzyme responsible for acidification is the vacuolar H+-ATPase (V-ATPase), which pumps protons from the cytoplasm into the pit. Unlike the acidification of small lysosomes, the pit is so large that protons become depleted from the cytoplasm. Hence, proton buffering and production in the cytoplasm by carbonic anhydrase II (CAII) is potentially important for proper acidification. We employ an ordinary differential equations (ODE)-based model that accounts for the changes in ionic species in the cytoplasm and the resorptive pit. Additionally, our model tracks ionic flow between the cytoplasm and the extracellular solution surrounding the cell. Whenever possible, the properties of individual channels and transporters are calibrated based on electrophysiological measurements, and physical properties of the cell, such as buffering capacity, surface areas, and volumes, are estimated based on available data. Our model reproduces many of the experimental findings regarding the role of key proteins in the acidification process, and it allows us to estimate, among other things, number of active pumps, protons moved, and the influence of particular mutations implicated in disease.
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Affiliation(s)
- Frank V Marcoline
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158, USA; Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158, USA
| | - Yoichi Ishida
- Department of Philosophy, Ohio University, Athens, OH 45701, USA
| | - Joseph A Mindell
- Membrane Transport Biophysics Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Smita Nayak
- Swedish Center for Research and Innovation, Swedish Health Services, Seattle, WA 98122, USA
| | - Michael Grabe
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158, USA; Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158, USA.
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Abstract
A known complication that can occur in patients using bisphosphonates (BPs) is osteonecrosis of the jaw (ONJ). ONJ features bone exposure that may be associated with severe pain, swelling, local infection, and pathological fracture of the jaw. Current literature indicates that a complex combination of factors is necessary to induce ONJ. Several hypotheses about the pathophysiology of ONJ were previously reported. Here, we review these hypotheses and introduce new ideas and suggestions on this topic, focusing on bone site-specific cells, and the effect that BPs and other anti-resorptive drugs have on those cells. Gaining more insight into bone site-specific effects may help to better understand the pathogenesis ONJ, and contribute to the development of new bone site-specific anti-resorptive drugs.
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Affiliation(s)
- Jenny A F Vermeer
- Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Greetje A P Renders
- Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Vincent Everts
- Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
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Yala S, Boustta M, Gallet O, Hindié M, Carreiras F, Benachour H, Sidane D, Khireddine H. New synthesis method of HA/P(D,L)LA composites: study of fibronectin adsorption and their effects in osteoblastic behavior for bone tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:140. [PMID: 27534400 DOI: 10.1007/s10856-016-5756-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 07/09/2016] [Indexed: 06/06/2023]
Abstract
A novel synthetic method to synthesize hydroxyapatite/poly (D,L) lactic acid biocomposite is presented in this study by mixing only the precursors hydroxyapatite and (D,L) LA monomer without adding neither solvent nor catalyst. Three compositions were successfully synthesized with the weight ratios of 1/1, 1/3, and 3/5 (hydroxyapatite/(D,L) lactic acid), and the grafting efficiency of poly (D,L) lactic acid on hydroxyapatite surface reaches up to 84 %. Scanning electron microscopy and Fourier transform infrared spectroscopy showed that the hydroxyapatite particles were successfully incorporated into the poly (D,L) lactic acid polymer and X ray diffraction analysis showed that hydroxyapatite preserved its crystallinity after poly (D,L) lactic acid grafting. Differential scanning calorimetry shows that Tg of hydroxyapatite/poly (D,L) lactic acid composite is less than Tg of pure poly (D,L) lactic acid, which facilitates the shaping of the composite obtained. The addition of poly (D,L) lactic acid improves the adsorption properties of hydroxyapatite for fibronectin extracellular matrix protein. Furthermore, the presence of poly (D,L) lactic acid on hydroxyapatite surface coated with fibronectin enhanced pre-osteoblast STRO-1 adhesion and cell spreading. These results show the promising potential of hydroxyapatite/poly (D,L) lactic acid composite as a bone substitute material for orthopedic applications and bone tissue engineering.
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Affiliation(s)
- Sabeha Yala
- Laboratoire de Génie de l'Environnement, Faculté de Technologie, Université de Bejaia, Bejaia, 06000, Algeria.
| | - Mahfoud Boustta
- Institut des Biomolécules Max Mousseron, UMR CNRS 5247, CRBA, Faculté des Sciences, Université de Montpellier, 15 avenue Charles Flahault, BP 14491, Montpellier cedex 5, 34093, France
| | - Olivier Gallet
- ERRMECe, Université de Cergy-Pontoise, Site Saint-Martin, 2 Avenue Adolphe Chauvin, Cergy-Pontoise Cedex, 95302, France
| | - Mathilde Hindié
- ERRMECe, Université de Cergy-Pontoise, Site Saint-Martin, 2 Avenue Adolphe Chauvin, Cergy-Pontoise Cedex, 95302, France
| | - Franck Carreiras
- ERRMECe, Université de Cergy-Pontoise, Site Saint-Martin, 2 Avenue Adolphe Chauvin, Cergy-Pontoise Cedex, 95302, France
| | - Hamanou Benachour
- ERRMECe, Université de Cergy-Pontoise, Site Saint-Martin, 2 Avenue Adolphe Chauvin, Cergy-Pontoise Cedex, 95302, France
| | - Djahida Sidane
- Laboratoire de Génie de l'Environnement, Faculté de Technologie, Université de Bejaia, Bejaia, 06000, Algeria
| | - Hafit Khireddine
- Laboratoire de Génie de l'Environnement, Faculté de Technologie, Université de Bejaia, Bejaia, 06000, Algeria
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Jennings A, MacGregor A, Spector T, Cassidy A. Amino Acid Intakes Are Associated With Bone Mineral Density and Prevalence of Low Bone Mass in Women: Evidence From Discordant Monozygotic Twins. J Bone Miner Res 2016; 31:326-35. [PMID: 26334651 PMCID: PMC4832262 DOI: 10.1002/jbmr.2703] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 12/02/2022]
Abstract
Although a higher protein intake, particularly from vegetable sources, has been shown to be associated with higher bone mineral density (BMD) the relative impact of specific amino acids on BMD and risk of osteoporosis remains to be determined. Mechanistic research suggests that a number of specific amino acids, including five nonessential amino acids--alanine, arginine, glutamic acid, glycine, and proline--may play a role in bone health, principally through improved production of insulin and insulin-like growth factor 1 and the synthesis of collagen and muscle protein. However to date, no previous studies have examined the associations between habitual intake of amino acids and direct measures of BMD and prevalence of osteoporosis or osteopenia, and no studies have examined this relationship in discordant identical twin-pairs. In these analyses of female monozygotic twin-pairs discordant for amino acid intake (n = 135), twins with higher intakes of alanine and glycine had significantly higher BMD at the spine than their co-twins with within-pair differences in spine-BMD of 0.012 g/cm(2) (SE 0.01; p = 0.039) and 0.014 g/cm(2) (SE 0.01; p = 0.026), respectively. Furthermore, in cross-sectional multivariable analyses of 3160 females aged 18 to 79 years, a higher intake of total protein was significantly associated with higher DXA-measured BMD at the spine (quartile Q4 to quartile Q1: 0.017 g/cm(2), SE 0.01, p = 0.035) and forearm (Q4 to Q1: 0.010 g/cm(2), SE 0.003, p = 0.002). Intake of six amino acids (alanine, arginine, glutamic acid, leucine, lysine, and proline) were associated with higher BMD at the spine and forearm with the strongest association observed for leucine (Q4 to Q1: 0.024 g/cm(2), SE 0.01, p = 0.007). When intakes were stratified by protein source, vegetable or animal, prevalence of osteoporosis or osteopenia was 13% to 19% lower comparing extreme quartiles of vegetable intake for five amino acids (not glutamic acid or proline). These data provide evidence to suggest that intake of protein and several amino acids, including alanine and glycine, may be beneficial for bone health, independent of genetic background.
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Affiliation(s)
- Amy Jennings
- Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Alexander MacGregor
- Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Tim Spector
- Department of Twin Research and Genetic Epidemiology, Kings College London, London, UK
| | - Aedín Cassidy
- Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, UK
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Liu W, Wang T, Yang C, Darvell BW, Wu J, Lin K, Chang J, Pan H, Lu WW. Alkaline biodegradable implants for osteoporotic bone defects--importance of microenvironment pH. Osteoporos Int 2016; 27:93-104. [PMID: 26134681 DOI: 10.1007/s00198-015-3217-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 06/16/2015] [Indexed: 10/23/2022]
Abstract
UNLABELLED Change of microenvironment pH by biodegradable implants may ameliorate unbalanced osteoporotic bone remodeling. The present work demonstrated that a weak alkaline condition stimulated osteoblasts differentiation while suppressed osteoclast generation. In vivo, implants with an alkaline microenvironment pH (monitored by a pH microelectrode) exhibited a promising healing effect for the repair of osteoporotic bone defects. INTRODUCTION Under osteoporotic conditions, the response of the bone microenvironment to an endosseous implant is significantly impaired, and this substantially increases the risk of fracture, non-union and aseptic implant loosening. Acid-base equilibrium is an important factor influencing bone cell behaviour. The present purpose was to study the effect of a series of alkaline biodegradable implant materials on regeneration of osteoporotic bone defect, monitoring the microenvironment pH (μe-pH) over time. METHODS The proliferation and differentiation potential of osteoporotic rat bone marrow stromal cells and RAW 264.7 cells were examined under various pH conditions. Ovariectomized rat bone defects were filled with specific biodegradable materials, and μe-pH was measured by pH microelectrode. New osteoid and tartrate-resistant acid phosphatase-positive osteoclast-like cells were examined by Goldner's trichrome and TRAP staining, respectively. The intermediate layer between implants and new bone were studied using energy-dispersive X-ray spectroscopy (EDX) linear scanning. RESULTS In vitro, weak alkaline conditions stimulated osteoporotic rat bone marrow stromal cells (oBMSC) differentiation, while inhibiting the formation of osteoclasts. In vivo, μe-pH differs from that of the homogeneous peripheral blood and exhibits variations over time particular to each material. Higher initial μe-pH was associated with more new bone formation, late response of TRAP-positive osteoclast-like cells and the development of an intermediate 'apatitic' layer in vivo. EDX suggested that residual material may influence μe-pH even 9 weeks post-surgery. CONCLUSION The pH microelectrode is suitable for in vivo μe-pH detection. Alkaline biodegradable materials generate an in vivo microenvironmental pH which is higher than the normal physiological value and show promising healing effects in the context of osteoporotic bone defects.
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Affiliation(s)
- W Liu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
- Shenzhen Key Laboratory of Marine Biomedical Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - T Wang
- Shenzhen Key Laboratory of Marine Biomedical Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - C Yang
- School of Medicine, Shenzhen University, Shenzhen, 518052, China
| | - B W Darvell
- Dental Materials Science, Department of Bioclinical Sciences, Faculty of Dentistry, Kuwait University, Kuwait City, Kuwait
| | - J Wu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - K Lin
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
| | - J Chang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
| | - H Pan
- Shenzhen Key Laboratory of Marine Biomedical Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
| | - W W Lu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.
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Bacterial inhibition potential of 3D rapid-prototyped magnesium-based porous composite scaffolds--an in vitro efficacy study. Sci Rep 2015; 5:13775. [PMID: 26346217 PMCID: PMC4561899 DOI: 10.1038/srep13775] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 08/05/2015] [Indexed: 12/20/2022] Open
Abstract
Bone infections are common in trauma-induced open fractures with bone defects. Therefore, developing anti-infection scaffolds for repairing bone defects is desirable. This study develoepd novel Mg-based porous composite scaffolds with a basal matrix composed of poly(lactic-co-glycolicacid) (PLGA) and tricalcium phosphate (TCP). A unique low-temperature rapid prototyping technology was used to fabricate the scaffolds, including PLGA/TCP (PT), PLGA/TCP/5%Mg (PT5M), PLGA/TCP/10%Mg (PT10M), and PLGA/TCP/15%Mg (PT15M). The bacterial adhesion and biofilm formation of Staphylococcus aureus were evaluated. The results indicated that the Mg-based scaffolds significantly inhibited bacterial adhesion and biofilm formation compared to PT, and the PT10M and PT15M exhibited significantly stronger anti-biofilm ability than PT5M. In vitro degratation tests revealed that the degradation of the Mg-based scaffolds caused an increase of pH, Mg(2+) concentration and osmolality, and the increased pH may be one of the major contributing factors to the antibacterial function of the Mg-based scaffolds. Additionally, the PT15M exhibited an inhibitory effect on cell adhesion and proliferation of MC3T3-E1 cells. In conclusion, the PLGA/TCP/Mg scaffolds could inhibit bacterial adhesion and biofilm formation, and the PT10M scaffold was considered to be an effective composition with considerable antibacterial ability and good cytocompatibility.
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43
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Burton LJ, Smith BA, Smith BN, Loyd Q, Nagappan P, McKeithen D, Wilder CL, Platt MO, Hudson T, Odero-Marah VA. Muscadine grape skin extract can antagonize Snail-cathepsin L-mediated invasion, migration and osteoclastogenesis in prostate and breast cancer cells. Carcinogenesis 2015; 36:1019-27. [PMID: 26069256 PMCID: PMC4643647 DOI: 10.1093/carcin/bgv084] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 05/21/2015] [Accepted: 06/03/2015] [Indexed: 11/12/2022] Open
Abstract
To develop new and effective chemopreventive agents against bone metastasis, we assessed the effects of muscadine grape skin extract (MSKE), whose main bioactive component is anthocyanin, on bone turnover, using prostate and breast cancer cell models overexpressing Snail transcription factor. MSKE has been shown previously to promote apoptosis in prostate cancer cells without affecting normal prostate epithelial cells. Snail is overexpressed in prostate and breast cancer, and is associated with increased invasion, migration and bone turnover/osteoclastogenesis. Cathepsin L (CatL) is a cysteine cathepsin protease that is overexpressed in cancer and involved in bone turnover. Snail overexpression in prostate (LNCaP, ARCaP-E) and breast (MCF-7) cancer cells led to increased CatL expression/activity and phosphorylated STAT-3 (pSTAT-3), compared to Neo vector controls, while the reverse was observed in C4-2 (the aggressive subline of LNCaP) cells with Snail knockdown. Moreover, CatL expression was higher in prostate and breast tumor tissue compared to normal tissue. MSKE decreased Snail and pSTAT3 expression, and abrogated Snail-mediated CatL activity, migration and invasion. Additionally, Snail overexpression promoted osteoclastogenesis, which was significantly inhibited by the MSKE as effectively as Z-FY-CHO, a CatL-specific inhibitor, or osteoprotegerin, a receptor activator of nuclear factor kappa B ligand (RANKL) antagonist. Overall, these novel findings suggest that Snail regulation of CatL may occur via STAT-3 signaling and can be antagonized by MSKE, leading to decreased cell invasion, migration and bone turnover. Therefore, inhibition using a natural product such as MSKE could potentially be a promising bioactive compound for bone metastatic cancer.
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Affiliation(s)
- Liza J Burton
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Basil A Smith
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Bethany N Smith
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Quentin Loyd
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Peri Nagappan
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Danielle McKeithen
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Catera L Wilder
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and
| | - Manu O Platt
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and
| | - Tamaro Hudson
- Department of Medicine, Howard University, Washington, DC 20060, USA
| | - Valerie A Odero-Marah
- Department of Biological Sciences, Center for Cancer Research and Therapeutic Development, Clark Atlanta University, Atlanta, GA 30314, USA Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30322, USA and Department of Medicine, Howard University, Washington, DC 20060, USA
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Abeni F, Petrera F, Dal Prà A, Rapetti L, Malagutti L, Galassi G. Blood parameters in fattening pigs fed whole-ear corn silage and housed in group pens or in metabolic cages1. J Anim Sci 2015; 93:3901-8. [DOI: 10.2527/jas.2015-9126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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45
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Ye WL, Zhao YP, Na R, Li F, Mei QB, Zhao MG, Zhou SY. Actively Targeted Delivery of Doxorubicin to Bone Metastases by a pH-Sensitive Conjugation. J Pharm Sci 2015; 104:2293-303. [DOI: 10.1002/jps.24476] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/24/2015] [Accepted: 04/16/2015] [Indexed: 11/08/2022]
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Ajao C, Andersson MA, Teplova VV, Nagy S, Gahmberg CG, Andersson LC, Hautaniemi M, Kakasi B, Roivainen M, Salkinoja-Salonen M. Mitochondrial toxicity of triclosan on mammalian cells. Toxicol Rep 2015; 2:624-637. [PMID: 28962398 PMCID: PMC5598359 DOI: 10.1016/j.toxrep.2015.03.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/29/2015] [Accepted: 03/30/2015] [Indexed: 01/08/2023] Open
Abstract
Effects of triclosan (5-chloro-2'-(2,4-dichlorophenoxy)phenol) on mammalian cells were investigated using human peripheral blood mono nuclear cells (PBMC), keratinocytes (HaCaT), porcine spermatozoa and kidney tubular epithelial cells (PK-15), murine pancreatic islets (MIN-6) and neuroblastoma cells (MNA) as targets. We show that triclosan (1-10 μg ml-1) depolarised the mitochondria, upshifted the rate of glucose consumption in PMBC, HaCaT, PK-15 and MNA, and subsequently induced metabolic acidosis. Triclosan induced a regression of insulin producing pancreatic islets into tiny pycnotic cells and necrotic death. Short exposure to low concentrations of triclosan (30 min, ≤1 μg/ml) paralyzed the high amplitude tail beating and progressive motility of spermatozoa, within 30 min exposure, depolarized the spermatozoan mitochondria and hyperpolarised the acrosome region of the sperm head and the flagellar fibrous sheath (distal part of the flagellum). Experiments with isolated rat liver mitochondria showed that triclosan impaired oxidative phosphorylation, downshifted ATP synthesis, uncoupled respiration and provoked excessive oxygen uptake. These exposure concentrations are 100-1000 fold lower that those permitted in consumer goods. The mitochondriotoxic mechanism of triclosan differs from that of valinomycin, cereulide and the enniatins by not involving potassium ionophoric activity.
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Key Words
- Acidosis
- BCF, bioconcentration factor
- EC50, concentration that diminishes the respective vitality parameter by ≥50%
- Electric transmembrane potential
- Glycolysis
- HaCaT, a spontaneously immortalized (non-neoplastic) keratinocyte cell line
- JC-1, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolyl-carbocyanine iodide
- MIC, minimal inhibitory concentration
- MIN-6, a murine pancreatic beta cell line
- MNA, a murine neuroblastoma cells
- Oxidative phosphorylation
- PBMC, monocyte-enriched peripheral blood mononuclear cells
- PI, propidium iodide
- PK-15, a porcine kidney tubular epithelial cell line
- PN, pyridine nucleotides
- RLM, rat liver mitochondria
- Sperm motility
- TPP+, tetraphenylphosphonium
- Uncoupler
- ΔΨ, electric transmembrane potential
- ΔΨm, membrane potential of the mitochondrial membrane
- ΔΨp, membrane potential of the plasma membrane
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Affiliation(s)
- Charmaine Ajao
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
| | - Maria A. Andersson
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
| | - Vera V. Teplova
- Institute of Theoretical and Experimental Biophysics, RAS, Puschino, Moscow Region, Russia
| | - Szabolcs Nagy
- Department of Animal Science and Animal Husbandry, University of Pannonia, Georgikon Faculty, Deak F. u.,16, H8360 Keszthely, Hungary
| | - Carl G. Gahmberg
- Dept. of Bio- and Environmental Sciences, Haartman Institute, University of Helsinki, FI-00014, Finland
| | - Leif C. Andersson
- Dept. of Pathology, Haartman Institute, University of Helsinki, FI-00014, Finland
| | - Maria Hautaniemi
- Finnish Food Safety Authority (EVIRA), Research and Laboratory Department, Veterinary Virology Research Unit, Mustialankatu 3, FI 00790 Helsinki, Finland
| | - Balazs Kakasi
- Institute of Environmental Sciences, University of Pannonia, Egyetem u. 10, H-8200 Veszprem, Hungary
| | - Merja Roivainen
- National Institute for Health and Welfare, Department of Virology, Mannerheimintie 166, 00300 Helsinki, Finland
| | - Mirja Salkinoja-Salonen
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
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Ferrucci L, Baroni M, Ranchelli A, Lauretani F, Maggio M, Mecocci P, Ruggiero C. Interaction between bone and muscle in older persons with mobility limitations. Curr Pharm Des 2015; 20:3178-97. [PMID: 24050165 DOI: 10.2174/13816128113196660690] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 09/13/2013] [Indexed: 12/18/2022]
Abstract
Aging is associated with a progressive loss of bone-muscle mass and strength. When the decline in mass and strength reaches critical thresholds associated with adverse health outcomes, they are operationally considered geriatric conditions and named, respectively, osteoporosis and sarcopenia. Osteoporosis and sarcopenia share many of the same risk factors and both directly or indirectly cause higher risk of mobility limitations, falls, fractures and disability in activities of daily living. This is not surprising since bones adapt their morphology and strength to the long-term loads exerted by muscle during anti-gravitational and physical activities. Non-mechanical systemic and local factors also modulate the mechanostat effect of muscle on bone by affecting the bidirectional osteocyte-muscle crosstalk, but the specific pathways that regulate these homeostatic mechanisms are not fully understood. More research is required to reach a consensus on cut points in bone and muscle parameters that identify individuals at high risk for adverse health outcomes, including falls, fractures and disability. A better understanding of the muscle-bone physiological interaction may help to develop preventive strategies that reduce the burden of musculoskeletal diseases, the consequent disability in older persons and to limit the financial burden associated with such conditions. In this review, we summarize age-related bone-muscle changes focusing on the biomechanical and homeostatic mechanisms that explain bone-muscle interaction and we speculate about possible pathological events that occur when these mechanisms become impaired. We also report some recent definitions of osteoporosis and sarcopenia that have emerged in the literature and their implications in clinical practice. Finally, we outline the current evidence for the efficacy of available anti-osteoporotic and proposed antisarcopenic interventions in older persons.
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Affiliation(s)
| | | | | | | | | | | | - C Ruggiero
- Institute of Gerontology and Geriatrics, Department of Medicine, University of Perugia, S. Andrea delle Fratte, 06100, Perugia, Italy.
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Molecular actions of ovarian cancer G protein-coupled receptor 1 caused by extracellular acidification in bone. Int J Mol Sci 2014; 15:22365-73. [PMID: 25479080 PMCID: PMC4284713 DOI: 10.3390/ijms151222365] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 11/13/2014] [Accepted: 11/17/2014] [Indexed: 12/16/2022] Open
Abstract
Extracellular acidification occurs under physiologic and pathologic conditions, such as exercise, ischemia, and inflammation. It has been shown that acidosis has various adverse effects on bone. In recent years there has been increasing evidence which indicates that ovarian cancer G protein-coupled receptor 1 (OGR1) is a pH-sensing receptor and mediates a variety of extracellular acidification-induced actions on bone cells and other cell types. Recent studies have shown that OGR1 is involved in the regulation of osteoclast differentiation, survival, and function, as well as osteoblast differentiation and bone formation. Moreover, OGR1 also regulates acid-induced apoptosis of endplate chondrocytes in intervertebral discs. These observations demonstrate the importance of OGR1 in skeletal development and metabolism. Here, we provide an overview of OGR1 regulation ofosteoclasts, osteoblasts, and chondrocytes, and the molecular actions of OGR1 induced by extracellular acidification in the maintenance of bone health.
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Gupta A, Atoria CL, Ehdaie B, Shariat SF, Rabbani F, Herr HW, Bochner BH, Elkin EB. Risk of fracture after radical cystectomy and urinary diversion for bladder cancer. J Clin Oncol 2014; 32:3291-8. [PMID: 25185104 DOI: 10.1200/jco.2013.54.3173] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
PURPOSE Radical cystectomy and urinary diversion may cause chronic metabolic acidosis, leading to long-term bone loss in patients with bladder cancer. However, the risk of fractures after radical cystectomy has not been defined. We assessed whether radical cystectomy and intestinal urinary diversion are associated with increased risk of fracture. PATIENTS AND METHODS Population-based study using SEER-Medicare-linked data from 2000 through 2007 for patients with stage 0-III bladder cancer. We evaluated the association between radical cystectomy and risk of fracture at any site, controlling for patient and disease characteristics. RESULTS The cohort included 50,520 patients, of whom 4,878 had cystectomy and urinary diversion. The incidence of fracture in the cystectomy group was 6.55 fractures per 100 person-years, compared with 6.39 fractures per 100 person-years in those without cystectomy. Cystectomy was associated with a 21% greater risk of fracture (adjusted hazard ratio, 1.21; 95% CI, 1.10 to 1.32) compared with no cystectomy, controlling for patient and disease characteristics. There was no evidence of an interaction between radical cystectomy and age, sex, comorbidity score, or cancer stage. CONCLUSION Patients with bladder cancer who have radical cystectomy and urinary diversion are at increased risk of fracture.
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Affiliation(s)
- Amit Gupta
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY.
| | - Coral L Atoria
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Behfar Ehdaie
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Shahrokh F Shariat
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Farhang Rabbani
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Harry W Herr
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Bernard H Bochner
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
| | - Elena B Elkin
- Amit Gupta, University of Iowa, Iowa City, IA; Coral L. Atoria, Behfar Ehdaie, Harry W. Herr, Bernard H. Bochner, Elena B. Elkin, Memorial Sloan Kettering Cancer Center, New York, NY; Shahrokh F. Shariat, Medical University of Vienna, Vienna, Austria; Farhang Rabbani, Albert Einstein College of Medicine, Bronx, NY
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Nørgaard J, Højberg O, Sørensen K, Eriksen J, Medina J, Poulsen H. The effect of long-term acidifying feeding on digesta organic acids, mineral balance, and bone mineralization in growing pigs. Anim Feed Sci Technol 2014. [DOI: 10.1016/j.anifeedsci.2014.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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