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van Trigt VR, Pelsma ICM, Kroon HM, Pereira AM, van der Meulen C, Kloppenburg M, Biermasz NR, Claessen KMJA. Low prevalence of neuropathic-like pain symptoms in long-term controlled acromegaly. Pituitary 2022; 25:229-237. [PMID: 34687408 PMCID: PMC8894222 DOI: 10.1007/s11102-021-01190-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/04/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE Pain is a common symptom of acromegaly, impairing health-related quality of life (HR-QoL) significantly despite long-term disease remission. Neuropathic-like pain (NP-like) symptoms are invalidating, with great impact on HR-QoL. Studies characterizing or investigating the etiology of pain in acromegaly are scarce. Therefore, we aimed to assess NP-like symptoms in a cohort of controlled acromegaly patients. METHODS Forty-four long-term controlled acromegaly patients (aged 62.6 ± 12.6 years; 56.8% female) were included in this cross-sectional study. NP-like symptoms were assessed using the validated painDETECT questionnaire. Patients were divided in three probability-based NP-like symptoms categories based on the total score (range 0-35): unlikely (≤ 12), indeterminate (13-18) and likely (≥ 19). HR-QoL (physical component score (PCS), and mental component score (MCS)), and self-reported pain were assessed using Short Form-36 (SF-36). Potential risk factors were determined using linear regression analyses. RESULTS Self-reported pain was reported by 35 patients (79.5%). Likely NP-like symptoms were present in 4/44 patients (9.1%), and indeterminate NP-like symptoms in 6/44 patients (13.6%). All patients with likely NP-like symptoms were female. Higher painDETECT scores were negatively associated with HR-QoL (PCS: r = - 0.46, P = 0.003; MCS: r = - 0.37, P = 0.018), and SF-36 pain scores (r = - 0.63, P < 0.0001). Female sex was a risk factor for NP-like symptoms. CONCLUSIONS Pain was prevalent in controlled acromegaly patients, whereas NP-like symptoms were relatively infrequent, and only observed in females. NP-like symptoms were associated with lower HR-QoL in acromegaly. Since specific analgesic therapy is available, awareness for characterization, increased understanding, and clinical trials regarding neuropathic pain identification and treatment in acromegaly patients are warranted.
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Affiliation(s)
- Victoria R van Trigt
- Department of Medicine, Division of Endocrinology, and Center for Endocrine Tumors Leiden, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Iris C M Pelsma
- Department of Medicine, Division of Endocrinology, and Center for Endocrine Tumors Leiden, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
| | - Herman M Kroon
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Alberto M Pereira
- Department of Medicine, Division of Endocrinology, and Center for Endocrine Tumors Leiden, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Coen van der Meulen
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Margreet Kloppenburg
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Nienke R Biermasz
- Department of Medicine, Division of Endocrinology, and Center for Endocrine Tumors Leiden, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Kim M J A Claessen
- Department of Medicine, Division of Endocrinology, and Center for Endocrine Tumors Leiden, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
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Wood CL, van ‘t Hof R, Dillon S, Straub V, Wong SC, Ahmed SF, Farquharson C. Combined growth hormone and insulin-like growth factor-1 rescues growth retardation in glucocorticoid-treated mdxmice but does not prevent osteopenia. J Endocrinol 2022; 253:63-74. [PMID: 35191394 PMCID: PMC9010817 DOI: 10.1530/joe-21-0388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 02/21/2022] [Indexed: 11/18/2022]
Abstract
Short stature and osteoporosis are common in Duchenne muscular dystrophy (DMD) and its pathophysiology may include an abnormality of the growth hormone/insulin-like growth factor-1 (GH/IGF-1) axis, which is further exacerbated by long-term glucocorticoid (GC) treatment. Hence, an agent that has anabolic properties and may improve linear growth would be beneficial in this setting and therefore requires further exploration. A 5-week-old x-linked muscular dystrophy (mdx) mice were used as a model of DMD. They were treated with prednisolone ± GH + IGF-1 for 4 weeks and then compared to control mdx mice to allow the study of both growth and skeletal structure. GC reduced cortical bone area, bone fraction, tissue area and volume and cortical bone volume, as assessed by micro computed tomography (CT) In addition, GC caused somatic and skeletal growth retardation but improved grip strength. The addition of GH + IGF-1 therapy rescued the somatic growth retardation and induced additional improvements in grip strength (16.9% increase, P < 0.05 compared to control). There was no improvement in bone microarchitecture (assessed by micro-CT and static histomorphometry) or biomechanical properties (assessed by three-point bending). Serum bone turnover markers (Serum procollagen 1 intact N-terminal propeptide (P1NP), alpha C-terminal telopeptide (αCTX)) also remained unaffected. Further work is needed to maximise these gains before proceeding to clinical trials in boys with DMD.
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Affiliation(s)
- Claire L Wood
- Division of Functional Genetics and Development, Roslin Institute, University of Edinburgh, Edinburgh, UK
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
- Correspondence should be addressed to C Wood or C Farquharson: or
| | - Rob van ‘t Hof
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
| | - Scott Dillon
- Division of Functional Genetics and Development, Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Sze C Wong
- Developmental Endocrinology Research Group, School of Medicine, University of Glasgow, Glasgow, UK
| | - S Faisal Ahmed
- Developmental Endocrinology Research Group, School of Medicine, University of Glasgow, Glasgow, UK
| | - Colin Farquharson
- Division of Functional Genetics and Development, Roslin Institute, University of Edinburgh, Edinburgh, UK
- Correspondence should be addressed to C Wood or C Farquharson: or
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Martín-Rivada Á, Barrios V, Martínez Díaz-Guerra G, Pozo J, Martos-Moreno GÁ, Argente J. Adult height and long-term outcomes after rhIGF-1 therapy in two patients with PAPP-A2 deficiency. Growth Horm IGF Res 2021; 60-61:101419. [PMID: 34358737 DOI: 10.1016/j.ghir.2021.101419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
PAPP-A2 deficiency is a novel syndrome characterized by short stature due to low IGF bioactivity, skeletal abnormalities and decreased bone mineral density (BMD). Treatment with recombinant human IGF-1 (rhIGF-1) for 1 year demonstrated to increase growth velocity and BMD, without reported adverse effects, but data regarding the long-term efficacy and safety of rhIGF-1 administration in this entity has not yet been reported. Two Spanish siblings with short stature due to a homozygous loss-of-function mutation in the PAPP-A2 gene (p.D643fs25*) were treated with rhIGF-1 twice daily for six years. Growth velocity continued to increase and both patients achieved their target height. Free IGF-1 concentrations increased notably after rhIGF-1 administration, with serum IGFBP-3, IGFBP-5 and ALS levels also being higher during treatment. BMD was progressively normalized and an increase in lean mass was also noted during treatment. No episodes of hypoglycemia or any other adverse effects were documented. An increase in the growth of kidney and spleen length was observed in one of the patients.
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Affiliation(s)
- Álvaro Martín-Rivada
- Hospital Infantil Universitario Niño Jesús, Departments of Pediatrics & Pediatric Endocrinology, Research Institute "La Princesa", Madrid, Spain
| | - Vicente Barrios
- Hospital Infantil Universitario Niño Jesús, Departments of Pediatrics & Pediatric Endocrinology, Research Institute "La Princesa", Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain
| | | | - Jesús Pozo
- Hospital Infantil Universitario Niño Jesús, Departments of Pediatrics & Pediatric Endocrinology, Research Institute "La Princesa", Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Universidad Autónoma de Madrid, Department of Pediatrics, Madrid, Spain
| | - Gabriel Ángel Martos-Moreno
- Hospital Infantil Universitario Niño Jesús, Departments of Pediatrics & Pediatric Endocrinology, Research Institute "La Princesa", Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Universidad Autónoma de Madrid, Department of Pediatrics, Madrid, Spain
| | - Jesús Argente
- Hospital Infantil Universitario Niño Jesús, Departments of Pediatrics & Pediatric Endocrinology, Research Institute "La Princesa", Madrid, Spain; Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Universidad Autónoma de Madrid, Department of Pediatrics, Madrid, Spain; IMDEA, Food Institute, CEIUAM+CSI, Cantoblanco, Madrid, Spain.
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El-Attrouny MM, Iraqi MM, Sabike II, Abdelatty AM, Moustafa MM, Badr OA. Comparative evaluation of growth performance, carcass characteristics and timed series gene expression profile of GH and IGF-1 in two Egyptian indigenous chicken breeds versus Rhode Island Red. J Anim Breed Genet 2020; 138:463-473. [PMID: 33098598 DOI: 10.1111/jbg.12517] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/28/2020] [Accepted: 10/05/2020] [Indexed: 12/01/2022]
Abstract
Indigenous chicken breeds in developing countries have diverse benefits to rural economy as a source of high-quality animal protein. However, there are few reports on the evaluation of economic traits in Egyptian indigenous breeds. Hence, this study aimed to investigate growth performance, carcass characteristics, body measurements and meat quality traits in two indigenous breeds of chickens (Benha line and Golden Montazah) versus Rhode Island Red as a reference worldwide breed. Besides, a time series expression profile of somatotropic axis genes including GH and IGF-1 and their plasma level concentrations were investigated. Benha line chickens (BL) revealed the highest improved estimates of growth performance, carcass characteristics and meat quality traits. In the same manner, it displayed the highest levels of hepatic GH and IGF-1 and muscle IGF-1 gene expression compared to Rhode Island Red (RIR) and Golden Montazah (GM) chickens. Accordingly, BL exhibited the highest levels of plasma IGF-1 and the lowest levels of plasma GH. This result suggests the direct association between growth performance, carcass characteristics and levels of IGF-1 gene expression in the selected chicken breeds. BL is a superior Egyptian genotype with candidate productive traits and competing characteristics, it could be used widely as a proven ancestor of commercial hybrid breeds.
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Affiliation(s)
- Mahmoud M El-Attrouny
- Department of Animal Production, Faculty of Agriculture at Moshtohor, Benha University, Qalyubia, Egypt
| | - Mahmoud M Iraqi
- Department of Animal Production, Faculty of Agriculture at Moshtohor, Benha University, Qalyubia, Egypt
| | - Islam I Sabike
- Department of Food Hygiene, Faculty of Veterinary Medicine, Benha University, Qalyubia, Egypt
| | - Alzahraa M Abdelatty
- Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Mahmoud M Moustafa
- Department of Genetics and Genetic Engineering, Faculty of Agriculture, Benha University, Qalyubia, Egypt
| | - Omnia A Badr
- Department of Genetics and Genetic Engineering, Faculty of Agriculture, Benha University, Qalyubia, Egypt
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Pereira LJ, Macari S, Coimbra CC, Pereira TDSF, Barrioni BR, Gomez RS, Silva TA, Paiva SM. Aerobic and resistance training improve alveolar bone quality and interferes with bone-remodeling during orthodontic tooth movement in mice. Bone 2020; 138:115496. [PMID: 32585320 DOI: 10.1016/j.bone.2020.115496] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/27/2022]
Abstract
The direct effects of physical activity on long bones are already recognized. However, little information is available regarding distant osseous sites, such as maxillary bone. We evaluated the influence of physical training on alveolar bone quality, with and without mechanically-induced load during orthodontic tooth movement in mice. Forty-two C57BL/6 mice were divided into sedentary, resistance and aerobic training groups. Training period lasted for eight weeks and mechanical loads (orthodontic tooth movement - OTM) were applied during the last 14 days of training. Both types of training enhanced the quality of maxillary bone, increasing bone mineral density (BMD), trabecular bone volume (BV) and bone volume/total volume ratio (BV/TV). OTM significantly reduced in trained groups. Consistently, the number of osteoblasts increased whereas the number of osteoclasts decreased on the OTM side in trained groups in comparison to the sedentary group. IGF-1, RUNX2 and OPG genes expression were also increased. The RANKL/OPG ratio and IL-6 expression were reduced in the maxillary bone. Similar results were verified in the femoral bone. In line with these findings, physical training resulted in a decrease of osteoclast differentiation from femoral bone marrow; as well as the force required to fracture the tibia of trained animals increased. Physical training also caused EDL muscle hypertrophy and increased expression of IGF-1 and IGF-1/Myostatin ratio in the gastrocnemius muscle, whereas FNDC5 gene expression was similar among groups in femur, but decreased in alveolar bone submitted to OTM. In conclusion, physical training increased bone quality, not only on long bones, but also in a distant site such as the maxilla. Differences were more evident in the course of maxillary mechanical loading. Mechanisms involve systemic and local effects on bone cells and target molecules as RANKL, OPG, IL-6 and IGF-1.
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Affiliation(s)
- Luciano J Pereira
- Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, Brazil; Universidade Federal de Lavras - UFLA, Lavras, Brazil.
| | - Soraia Macari
- Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, Brazil
| | | | | | | | | | - Tarcília A Silva
- Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, Brazil
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6
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Kim NR, Jardí F, Khalil R, Antonio L, Schollaert D, Deboel L, van Lenthe GH, Decallonne B, Carmeliet G, Gustafsson JÅ, Claessens F, Ohlsson C, Lagerquist MK, Dubois V, Vanderschueren D. Estrogen receptor alpha signaling in extrahypothalamic neurons during late puberty decreases bone size and strength in female but not in male mice. FASEB J 2020; 34:7118-7126. [PMID: 32239553 DOI: 10.1096/fj.202000272r] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/13/2020] [Accepted: 03/20/2020] [Indexed: 12/16/2022]
Abstract
Sexually dimorphic bone structure emerges largely during puberty. Sex steroids are critical for peak bone mass acquisition in both genders. In particular, the biphasic effects of estrogens mediate the skeletal sexual dimorphism. However, so far the stimulatory vs inhibitory actions of estrogens on bone mass are not fully explained by direct effects on bone cells. Recently, it has become evident that there is possible neuroendocrine action of estrogen receptor alpha (ERα) on the skeleton. Based on these considerations, we hypothesized that neuronal ERα-signaling may contribute to the skeletal growth during puberty. Here, we generated mice with tamoxifen-inducible Thy1-Cre mediated ERα inactivation during late puberty specifically in extrahypothalamic neurons (N-ERαKO). Inactivation of neuronal ERα did not alter the body weight in males, whereas N-ERαKO females exhibited a higher body weight and increased body and bone length compared to their control littermates at 16 weeks of age. Ex vivo microCT analysis showed increased radial bone expansion of the midshaft femur in female N-ERαKO along with higher serum levels of insulin-like growth factor (IGF)-1 as well as IGF-binding protein (IGFBP)-3. Furthermore, the 3-point bending test revealed increased bone strength in female N-ERαKO. In contrast, inactivation of neuronal ERα had no major effect on bone growth in males. In conclusion, we demonstrate that central ERα-signaling limits longitudinal bone growth and radial bone expansion specifically in females potentially by interacting with the GH/IGF-1 axis.
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Affiliation(s)
- Na Ri Kim
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Ferran Jardí
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Rougin Khalil
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Leen Antonio
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Dieter Schollaert
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Ludo Deboel
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - G Harry van Lenthe
- Biomechanics Section, Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
| | - Brigitte Decallonne
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Geert Carmeliet
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Jan-Åke Gustafsson
- Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, TX, USA
| | - Frank Claessens
- Molecular Endocrinology Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Claes Ohlsson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Marie K Lagerquist
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Vanessa Dubois
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Dirk Vanderschueren
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
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Xu M, Wang T, Wang J, Wan W, Wang Z, Guan D, Sun H. An evaluation of mixed plant protein in the diet of Yellow River carp (Cyprinus carpio): growth, body composition, biochemical parameters, and growth hormone/insulin-like growth factor 1. Fish Physiol Biochem 2019; 45:1331-1342. [PMID: 31011873 DOI: 10.1007/s10695-019-00641-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 04/03/2019] [Indexed: 06/09/2023]
Abstract
The aim of this work is to evaluate the effects of dietary inclusion of mixed plant protein (MP) (rapeseed meal:cottonseed meal:peanut meal = 1:1:1) on growth, body composition, blood biochemical parameters, growth hormone/insulin-like growth factor 1, and relative non-specific immune response in Yellow River carp Cyprinus carpio. Five isonitrogenous and isoenergetic trial diets were formulated to replace fish meal at 0 (MP0, control), 25% (MP25), 50% (MP50), 75% (MP75), and 100% (MP100) mixed plant protein, respectively. The 25% mixed plant protein did not affect the weight gain, specific growth rate, and protein efficiency ratio, whereas these parameters were depressed by 50% and above mixed plant protein. The whole body protein content gradually decreased with increasing dietary MP; meanwhile, the whole body lipid content is the opposite. The MP75 and MP100 diets adversely affected the glucose level, total cholesterol value, alanine transaminase, and aspartate transaminase activity of serum. Fish fed MP75 and MP100 diets showed higher growth hormone level than that of MP0 diet; however, the insulin-like growth factor 1 level got the opposite result. The 50% and above inclusion of MP decreased lysozyme activity and increased malondialdehyde content. In conclusion, no more than 50% of fish meal could be replaced by mixed plant protein in diet. However, 50% and above inclusion of mixed plant protein in diet could depress the growth, insulin-like growth factor 1 level, and non-specific immune response, and significantly affect the whole body composition and serum biochemical parameters in Yellow River carp.
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Affiliation(s)
- Mengmeng Xu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China
| | - Tingting Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China
| | - Jiting Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China.
| | - Wenju Wan
- Department of Basic Medicine, Taishan Medical University, 2 Yingsheng East Road, Tai'an, Shandong Province, Tai'an, 271018, Shandong Province, China
| | - Zhen Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China
| | - Dongyan Guan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China
| | - Huiwen Sun
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Lab of Aquatic Animal Nutrition and Environmental Health, Shandong Agricultural University, 61 Daizong Street, Tai'an, 271018, Shandong Province, China
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McMichael BK, Jeong YH, Auerbach JA, Han CM, Sedlar R, Shettigar V, Bähler M, Agarwal S, Kim DG, Lee BS. The RhoGAP Myo9b Promotes Bone Growth by Mediating Osteoblastic Responsiveness to IGF-1. J Bone Miner Res 2017; 32:2103-2115. [PMID: 28585695 DOI: 10.1002/jbmr.3192] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 05/26/2017] [Accepted: 06/05/2017] [Indexed: 12/31/2022]
Abstract
The Ras homolog A (RhoA) subfamily of Rho guanosine triphosphatases (GTPases) regulates actin-based cellular functions in bone such as differentiation, migration, and mechanotransduction. Polymorphisms or genetic ablation of RHOA and some of its regulatory guanine exchange factors (GEFs) have been linked to poor bone health in humans and mice, but the effects of RhoA-specific GTPase-activating proteins (GAPs) on bone quality have not yet been identified. Therefore, we examined the consequences of RhoGAP Myo9b gene knockout on bone growth, phenotype, and cellular activity. Male and female mice lacking both alleles demonstrated growth retardation and decreased bone formation rates during early puberty. These mice had smaller, weaker bones by 4 weeks of age, but only female KOs had altered cellular numbers, with fewer osteoblasts and more osteoclasts. By 12 weeks of age, bone quality in KOs worsened. In contrast, 4-week-old heterozygotes demonstrated bone defects that resolved by 12 weeks of age. Throughout, Myo9b ablation affected females more than males. Osteoclast activity appeared unaffected. In primary osteogenic cells, Myo9b was distributed in stress fibers and focal adhesions, and its absence resulted in poor spreading and eventual detachment from culture dishes. Similarly, MC3T3-E1 preosteoblasts with transiently suppressed Myo9b levels spread poorly and contained decreased numbers of focal adhesions. These cells also demonstrated reduced ability to undergo IGF-1-induced spreading or chemotaxis toward IGF-1, though responses to PDGF and BMP-2 were unaffected. IGF-1 receptor (IGF1R) activation was normal in cells with diminished Myo9b levels, but the activated receptor was redistributed from stress fibers and focal adhesions into nuclei, potentially affecting receptor accessibility and gene expression. These results demonstrate that Myo9b regulates a subset of RhoA-activated processes necessary for IGF-1 responsiveness in osteogenic cells, and is critical for normal bone formation in growing mice. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
| | - Yong-Hoon Jeong
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | | | - Cheol-Min Han
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Ryan Sedlar
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Vikram Shettigar
- College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Martin Bähler
- Institut für Molekulare Zellbiologie, Universität Münster, Münster, Germany
| | - Sudha Agarwal
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Do-Gyoon Kim
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Beth S Lee
- College of Medicine, The Ohio State University, Columbus, OH, USA
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Majoor BC, Appelman-Dijkstra NM, Fiocco M, van de Sande MA, Dijkstra PS, Hamdy NA. Outcome of Long-Term Bisphosphonate Therapy in McCune-Albright Syndrome and Polyostotic Fibrous Dysplasia. J Bone Miner Res 2017; 32:264-276. [PMID: 27649526 DOI: 10.1002/jbmr.2999] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/24/2016] [Accepted: 09/14/2016] [Indexed: 12/31/2022]
Abstract
McCune-Albright syndrome (MAS) is a rare bone disorder characterized by fibrous dysplasia (FD), endocrinopathies, and café-au-lait patches. FD patients have been shown to respond favorably to treatment with bisphosphonates, but data are scarce in the more severe polyostotic form (PFD), including MAS, and factors determining treatment outcome are not known, particularly in the long-term. We evaluated the biochemical (bone turnover markers [BTMs]) and clinical (pain reduction) outcome of bisphosphonate therapy in 11 patients with MAS and 30 patients with PFD: median duration of treatment 6 years (range, 2 to 25 years). Prognostic factors for treatment outcome were identified in both groups. Patients with MAS were younger at diagnosis (p = 0.001), all had precocious puberty, and four (36%) had additional growth hormone (GH) excess associated with severe craniofacial FD. Extent of skeletal disease was more severe in MAS compared to PFD. MAS patients had higher serum alkaline phosphatase (ALP) concentrations (p = 0.005), higher skeletal burden scores (p < 0.001), and more fractures (p = 0.021). MAS patients had also higher levels of FGF-23 (p = 0.008) and higher prevalence of hypophosphatemia (p = 0.013). Twenty-four of 30 PFD patients (80%) demonstrated a complete clinical and biochemical response within a year of starting treatment (p = 0.015), compared to only four of 11 MAS patients (36%). There were no nonresponders. In the whole group, FGF-23, total ALP, P1NP, and CTX positively correlated with skeletal burden scores (all p ≤ 0.001), which was the only significant risk factor for an incomplete response to bisphosphonate therapy (p < 0.01). Our data suggest a beneficial and safe outcome of long-term bisphosphonate therapy in the majority of patients with PFD, although response to therapy was limited by the higher skeletal disease burden in MAS patients. In the PFD/MAS population studied, the only identified prognostic factor that influenced the outcome of bisphosphonate therapy was a high skeletal burden score. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Bas Cj Majoor
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands.,Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Natasha M Appelman-Dijkstra
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands.,Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands
| | - Martha Fiocco
- Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands.,Mathematical Institute, Leiden University, Leiden, The Netherlands
| | - Michiel Aj van de Sande
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands.,Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Pd Sander Dijkstra
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands.,Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Neveen At Hamdy
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands.,Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands
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