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Grimes H, Ansari M, Ashraf T, Cueto-González AM, Calder A, Day M, Fernandez Alvarez P, Foster A, Lahiri N, Repetto GM, Scurr I, Varghese V, Low KJ. PUF60-related developmental disorder: A case series and phenotypic analysis of 10 additional patients with monoallelic PUF60 variants. Am J Med Genet A 2023; 191:2610-2622. [PMID: 37303278 DOI: 10.1002/ajmg.a.63313] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 05/11/2023] [Accepted: 05/18/2023] [Indexed: 06/13/2023]
Abstract
PUF60-related developmental disorder (also referred to as Verheij syndrome), resulting from haploinsufficiency of PUF60, is associated with multiple congenital anomalies affecting a wide range of body systems. These anomalies include ophthalmic coloboma, and congenital anomalies of the heart, kidney, and musculoskeletal system. Behavioral and intellectual difficulties are also observed. While less common than other features associated with PUF60-related developmental disorder, for instance hearing impairment and short stature, identification of specific anomalies such as ophthalmic coloboma can aid with diagnostic identification given the limited spectrum of genes linked with this feature. We describe 10 patients with PUF60 gene variants, bringing the total number reported in the literature, to varying levels of details, to 56 patients. Patients were recruited both via locally based exome sequencing from international sites and from the DDD study in the United Kingdom. Eight of the variants reported were novel PUF60 variants. The addition of a further patient with a reported c449-457del variant to the existing literature highlights this as a recurrent variant. One variant was inherited from an affected parent. This is the first example in the literature of an inherited variant resulting in PUF60-related developmental disorder. Two patients (20%) were reported to have a renal anomaly consistent with 22% of cases in previously reported literature. Two patients received specialist endocrine treatment. More commonly observed were clinical features such as: cardiac anomalies (40%), ocular abnormalities (70%), intellectual disability (60%), and skeletal abnormalities (80%). Facial features did not demonstrate a recognizable gestalt. Of note, but remaining of unclear causality, we describe a single pediatric patient with pineoblastoma. We recommend that stature and pubertal progress should be monitored in PUF60-related developmental disorder with a low threshold for endocrine investigations as hormone therapy may be indicated. Our study reports an inherited case with PUF60-related developmental disorder which has important genetic counseling implications for families.
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Affiliation(s)
- H Grimes
- Department of Clinical Genetics, University Hospitals Bristol and Weston NHS Trust, Bristol, UK
| | - M Ansari
- South East Scotland Genetics Service, Western General Hospital, Edinburgh, UK
| | - T Ashraf
- Department of Clinical Genetics, Great Ormond Street Hospital, London, UK
| | - Anna Mª Cueto-González
- Department of Clinical and Molecular Genetics, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
- Medicine Genetics Group, Vall Hebron Research Institute (VHIR), Vall d'Hebron Barcelona Hospital Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - A Calder
- Department of Radiology, Great Ormond Street Hospital, London, UK
| | - M Day
- Exeter Genetics Laboratory, Royal Devon and Exeter NHS Trust, Exeter, UK
| | - P Fernandez Alvarez
- Department of Clinical and Molecular Genetics, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - A Foster
- Department of Clinical Genetics, West Midlands Regional Genetics Centre, Birmingham, UK
| | - N Lahiri
- Department of Clinical Genetics, St Georges University Hospital NHS Foundation Trust, London, UK
- Department of Clinical and Molecular Science, St Georges University of London, London, UK
| | - G M Repetto
- Centro de Genética y Genómica, Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - I Scurr
- Department of Clinical Genetics, University Hospitals Bristol and Weston NHS Trust, Bristol, UK
| | - V Varghese
- All Wales Medical Genomics Services, University Hospital of Wales, Cardiff, UK
| | - Karen J Low
- Department of Clinical Genetics, University Hospitals Bristol and Weston NHS Trust, Bristol, UK
- Centre for Academic Child Health, University of Bristol, Bristol, UK
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Lin F, Liu Y, Rudeski-Rohr T, Dahir N, Calder A, Gilbertson TA. Adiponectin Enhances Fatty Acid Signaling in Human Taste Cells by Increasing Surface Expression of CD36. Int J Mol Sci 2023; 24:ijms24065801. [PMID: 36982874 PMCID: PMC10059208 DOI: 10.3390/ijms24065801] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/10/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Adiponectin, a key metabolic hormone, is secreted into the circulation by fat cells where it enhances insulin sensitivity and stimulates glucose and fatty acid metabolism. Adiponectin receptors are highly expressed in the taste system; however, their effects and mechanisms of action in the modulation of gustatory function remain unclear. We utilized an immortalized human fungiform taste cell line (HuFF) to investigate the effect of AdipoRon, an adiponectin receptor agonist, on fatty acid-induced calcium responses. We showed that the fat taste receptors (CD36 and GPR120) and taste signaling molecules (Gα-gust, PLCβ2, and TRPM5) were expressed in HuFF cells. Calcium imaging studies showed that linoleic acid induced a dose-dependent calcium response in HuFF cells, and it was significantly reduced by the antagonists of CD36, GPR120, PLCβ2, and TRPM5. AdipoRon administration enhanced HuFF cell responses to fatty acids but not to a mixture of sweet, bitter, and umami tastants. This enhancement was inhibited by an irreversible CD36 antagonist and by an AMPK inhibitor but was not affected by a GPR120 antagonist. AdipoRon increased the phosphorylation of AMPK and the translocation of CD36 to the cell surface, which was eliminated by blocking AMPK. These results indicate that AdipoRon acts to increase cell surface CD36 in HuFF cells to selectively enhance their responses to fatty acids. This, in turn, is consistent with the ability of adiponectin receptor activity to alter taste cues associated with dietary fat intake.
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Affiliation(s)
- Fangjun Lin
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Yan Liu
- Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Trina Rudeski-Rohr
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Naima Dahir
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Ashley Calder
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Timothy A Gilbertson
- Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
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Omer M, Ngo C, Ali H, Orlovskaya N, Cheong VS, Ballesteros A, Garner MT, Wynn A, Martyniak K, Wei F, Collins BE, Yarmolenko SN, Asiatico J, Kinzel M, Ghosh R, Meckmongkol T, Calder A, Dahir N, Gilbertson TA, Sankar J, Coathup M. The Effect of Omega-9 on Bone Viscoelasticity and Strength in an Ovariectomized Diet-Fed Murine Model. Nutrients 2023; 15:nu15051209. [PMID: 36904208 PMCID: PMC10005705 DOI: 10.3390/nu15051209] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/30/2023] [Accepted: 02/10/2023] [Indexed: 03/08/2023] Open
Abstract
Few studies have investigated the effect of a monosaturated diet high in ω-9 on osteoporosis. We hypothesized that omega-9 (ω-9) protects ovariectomized (OVX) mice from a decline in bone microarchitecture, tissue loss, and mechanical strength, thereby serving as a modifiable dietary intervention against osteoporotic deterioration. Female C57BL/6J mice were assigned to sham-ovariectomy, ovariectomy, or ovariectomy + estradiol treatment prior to switching their feed to a diet high in ω-9 for 12 weeks. Tibiae were evaluated using DMA, 3-point-bending, histomorphometry, and microCT. A significant decrease in lean mass (p = 0.05), tibial area (p = 0.009), and cross-sectional moment of inertia (p = 0.028) was measured in OVX mice compared to the control. A trend was seen where OVX bone displayed increased elastic modulus, ductility, storage modulus, and loss modulus, suggesting the ω-9 diet paradoxically increased both stiffness and viscosity. This implies beneficial alterations on the macro-structural, and micro-tissue level in OVX bone, potentially decreasing the fracture risk. Supporting this, no significant differences in ultimate, fracture, and yield stresses were measured. A diet high in ω-9 did not prevent microarchitectural deterioration, nevertheless, healthy tibial strength and resistance to fracture was maintained via mechanisms independent of bone structure/shape. Further investigation of ω-9 as a therapeutic in osteoporosis is warranted.
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Affiliation(s)
- Mahmoud Omer
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Christopher Ngo
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
| | - Hessein Ali
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Nina Orlovskaya
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Vee San Cheong
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield S1 3JD, UK
| | | | | | - Austin Wynn
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Kari Martyniak
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
| | - Fei Wei
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
| | - Boyce E. Collins
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - Sergey N. Yarmolenko
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - Jackson Asiatico
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Michael Kinzel
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Ranajay Ghosh
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Teerin Meckmongkol
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
- Department of General Surgery, Nemours Children’s Hospital, Orlando, FL 32827, USA
| | - Ashley Calder
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Naima Dahir
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | | | - Jagannathan Sankar
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - Melanie Coathup
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA
- Correspondence: ; Tel.: +1-407-266-7184
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Hill B, Calder A, Flemming J, Gilmore S, Guo Y, Harshyne L, Linnenbach A, Martinez-Outschoorn U, Curry J, South A, Luginbuhl A, Mahoney M. 089 Desmoglein 2 promotes tumor development through miR-146a/IRAK1/IL-8 signaling axis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Omer M, Ali H, Orlovskaya N, Ballesteros A, Cheong VS, Martyniak K, Wei F, Collins BE, Yarmolenko SN, Asiatico J, Kinzel M, Ngo C, Sankar J, Calder A, Gilbertson T, Meckmongkol T, Ghosh R, Coathup M. Omega-9 Modifies Viscoelasticity and Augments Bone Strength and Architecture in a High-Fat Diet-Fed Murine Model. Nutrients 2022; 14:nu14153165. [PMID: 35956341 PMCID: PMC9370223 DOI: 10.3390/nu14153165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 02/04/2023] Open
Abstract
The influence of diet on the development of osteoporosis is significant and not fully understood. This study investigated the effect of diets of varying lipid profiles and ω-3, ω-6 and ω-9 composition on the structural and mechanical properties of bone. The hypothesis studied was that a diet high in saturated fat would induce osteoporosis and produce an overall increased detrimental bony response when compared with a diet high in unsaturated ω-6, or ω-9. Male C57BL/6J mice were fed either a control diet, 50:50 mix (saturated:unsaturated) high in ω-9 (HFD50:50), a diet high in saturated fat (HSF) or a polyunsaturated fat diet high in ω-6 (PUFA) over an 8-week duration. Tibiae were retrieved and evaluated using DMA, 3-point-bending, histomorphometry, and microCT. Mice fed a HSF diet displayed key features characteristic of osteoporosis. The loss tangent was significantly increased in the HFD50:50 diet group compared with control (p = 0.016) and PUFA-fed animals (p = 0.049). HFD50:50-fed mice presented with an increased viscous component, longer tibiae, increased loss modulus (p = 0.009), and ultimate stress, smaller microcracks (p < 0.001), and increased trabecular width (p = 0.002) compared with control animals. A diet high in ω-9 resulted in an overall superior bone response and further analysis of its role in bone health is warranted.
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Affiliation(s)
- Mahmoud Omer
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
- Correspondence:
| | - Hessein Ali
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
| | - Nina Orlovskaya
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
| | - Amelia Ballesteros
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA; (A.C.); (T.G.)
| | - Vee San Cheong
- Department of Automatic Control and Systems Engineering, Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield S1 3JD, UK;
| | - Kari Martyniak
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
| | - Fei Wei
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
| | - Boyce E. Collins
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA; (B.E.C.); (S.N.Y.); (J.S.)
| | - Sergey N. Yarmolenko
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA; (B.E.C.); (S.N.Y.); (J.S.)
| | - Jackson Asiatico
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
| | - Michael Kinzel
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
| | - Christopher Ngo
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA; (A.C.); (T.G.)
| | - Jagannathan Sankar
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA; (B.E.C.); (S.N.Y.); (J.S.)
| | - Ashley Calder
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA; (A.C.); (T.G.)
| | - Timothy Gilbertson
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA; (A.C.); (T.G.)
| | - Teerin Meckmongkol
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
- Department of General Surgery, Nemours Children’s Hospital, Orlando, FL 32827, USA
| | - Ranajay Ghosh
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA; (H.A.); (N.O.); (J.A.); (M.K.); (R.G.)
| | - Melanie Coathup
- Biionix Cluster, University of Central Florida, Orlando, FL 32827, USA; (A.B.); (K.M.); (F.W.); (C.N.); (T.M.); (M.C.)
- College of Medicine, University of Central Florida, Orlando, FL 32827, USA; (A.C.); (T.G.)
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Liu Y, Xu H, Dahir N, Calder A, Lin F, Gilbertson TA. GPR84 Is Essential for the Taste of Medium Chain Saturated Fatty Acids. J Neurosci 2021; 41:5219-5228. [PMID: 33941648 PMCID: PMC8211552 DOI: 10.1523/jneurosci.2530-20.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 11/21/2022] Open
Abstract
The ability of mammalian taste cells to respond to fatty acids (FAs) has garnered significant attention of late and has been proposed to represent a sixth primary taste. With few exceptions, studies on FA taste have centered exclusively on polyunsaturated FAs, most notably on linoleic acid. In the current study, we have identified an additional FA receptor, GPR84, in the gustatory system that responds to the medium-chain saturated FAs (MCFAs) in male mice. GPR84 ligands activate both Type II and Type III taste cells in calcium imaging and patch-clamp recording assays. MCFAs depolarize and lead to a rise in intracellular free [Ca2+] in mouse taste cells in a concentration-dependent fashion, and the relative ligand specificity in taste cells is consistent with the response profile of GPR84 expressed in a heterologous system. A systemic Gpr84-/- mouse model reveals a specific deficit in both the neural (via chorda tympani recording) and behavioral responses to administration of oral MCFAs compared with WT mice. Together, we show that the peripheral taste system can respond to an additional class of FAs, the saturated FAs, and that the cognate receptor necessary for this ability is GPR84.
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Affiliation(s)
- Yan Liu
- Department of Internal Medicine, University of Central Florida, Orlando, Florida 32827
| | - Han Xu
- Department of Biology, Utah State University, Logan, Utah 84322
| | - Naima Dahir
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida 32827
| | - Ashley Calder
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida 32827
| | - Fangjun Lin
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida 32827
| | - Timothy A Gilbertson
- Department of Internal Medicine, University of Central Florida, Orlando, Florida 32827
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Martyniak K, Wei F, Ballesteros A, Meckmongkol T, Calder A, Gilbertson T, Orlovskaya N, Coathup MJ. Do polyunsaturated fatty acids protect against bone loss in our aging and osteoporotic population? Bone 2021; 143:115736. [PMID: 33171312 DOI: 10.1016/j.bone.2020.115736] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 02/07/2023]
Abstract
Age-related bone loss is inevitable in both men and women and there will soon be more people of extreme old age than ever before. Osteoporosis is a common chronic disease and as the proportion of older people, rate of obesity and the length of life increases, a rise in age-related degenerating bone diseases, disability, and prolonged dependency is projected. Fragility fractures are one of the most severe complications associated with both primary and secondary osteoporosis and current treatment strategies target weight-bearing exercise and pharmacological intervention, both with limited long-term success. Obesity and osteoporosis are intimately interrelated, and diet is a variable that plays a significant role in bone regeneration and repair. The Western Diet is characterized by its unhealthy components, specifically excess amounts of saturated fat intake. This review examines the impact of saturated and polyunsaturated fatty acid consumption on chronic inflammation, osteogenesis, bone architecture, and strength and explores the hypothesis that dietary polyunsaturated fats have a beneficial effect on osteogenesis, reducing bone loss by decreasing chronic inflammation, and activating bone resorption through key cellular and molecular mechanisms in our aging population. We conclude that aging, obesity and a diet high in saturated fatty acids significantly impairs bone regeneration and repair and that consumption of ω-3 polyunsaturated fatty acids is associated with significantly increased bone regeneration, improved microarchitecture and structural strength. However, ω-6 polyunsaturated fatty acids were typically pro-inflammatory and have been associated with an increased fracture risk. This review suggests a potential role for ω-3 fatty acids as a non-pharmacological dietary method of reducing bone loss in our aging population. We also conclude that contemporary amendments to the formal nutritional recommendations made by the Food and Nutrition Board may be necessary such that our aging population is directly considered.
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Affiliation(s)
- Kari Martyniak
- Biionix Cluster, University of Central Florida, Orlando, FL, United States; Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Fei Wei
- Biionix Cluster, University of Central Florida, Orlando, FL, United States; Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Amelia Ballesteros
- Biionix Cluster, University of Central Florida, Orlando, FL, United States; Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Teerin Meckmongkol
- Biionix Cluster, University of Central Florida, Orlando, FL, United States; Department of General Surgery, Nemours Children's Hospital, Orlando, FL, United States
| | - Ashley Calder
- Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Timothy Gilbertson
- Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Nina Orlovskaya
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, United States
| | - Melanie J Coathup
- Biionix Cluster, University of Central Florida, Orlando, FL, United States; Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States.
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Polubothu S, Abdin D, Barysch M, Thomas A, Bulstrode N, Evans R, Solman L, Obwegeser J, Hennekam R, Weibel L, Calder A, Di Donato N, Kinsler V. Dermatological signs lead to discovery of mosaic
ACTB
variants in segmental odontomaxillary dysplasia. Br J Dermatol 2020; 183:1128-1130. [DOI: 10.1111/bjd.19339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 11/28/2022]
Affiliation(s)
- S. Polubothu
- Genetics and Genomic Medicine University College London GOS Institute of Child Health LondonWC1N 1EHUK
- Paediatric DermatologyGreat Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
| | - D. Abdin
- Institute for Clinical Genetics Dresden Germany
| | - M. Barysch
- Dermatology Department University Hospital Zurich Zurich Switzerland
| | - A. Thomas
- Genetics and Genomic Medicine University College London GOS Institute of Child Health LondonWC1N 1EHUK
| | - N. Bulstrode
- Plastic SurgeryGreat Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
| | - R. Evans
- Maxillofacial and Dental DepartmentGreat Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
| | - L. Solman
- Paediatric DermatologyGreat Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
| | - J. Obwegeser
- Maxillofacial Surgery University Children’s Hospital Zurich and Limmat Cleft‐ and Craniofacial Center Zurich Switzerland
| | - R.C. Hennekam
- Department of Paediatrics Amsterdam UMC Meibergdreef 9 1105AZ Amsterdam the Netherlands
| | - L. Weibel
- Dermatology Department University Hospital Zurich Zurich Switzerland
| | - A. Calder
- Radiology Great Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
| | | | - V.A. Kinsler
- Genetics and Genomic Medicine University College London GOS Institute of Child Health LondonWC1N 1EHUK
- Paediatric DermatologyGreat Ormond St Hospital for Children NHS Foundation Trust LondonWC1N 3JHUK
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Dahir N, Calder A, Gilbertson TA. Interactions of Estrogen and TRPM5 Channels in Fat Taste and Metabolism. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.01815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Howes RJ, Calder A, Hollingsworth A, Jones A. The end for the ‘Roman Sandal’: an observational study of methods of securing chest drains in a deployed military setting. ACTA ACUST UNITED AC 2015. [DOI: 10.1136/jrnms-101-42] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AbstractIntroductionThere is ongoing debate regarding the optimal method of securing chest drains in trauma patients. Various courses describe methods for chest drain insertion, but little has been published to identify the best method to secure the drain.AimThis article aims to examine differences in approach to securing chest drains and the security of the methods used.MethodWhilst in a deployed medical treatment facility, 26 clinicians from various specialties and nationalities were asked to secure a pre-placed drain. A 32F drain was placed in a manikin and the clinicians were given a chance to prepare their equipment. They were given a choice of suture and their attempts were observed by one of the researchers. The attempts were timed and photographed. A second researcher, who had not observed the technique, then assessed the security of the drain.Results15/26 clinicians used a ‘Roman Sandal’ technique with 5/26 proving to be insecure. Other techniques used showed no failure. The rate of consultant‐secured failure was 12.5% compared to 40% for registrars and 33% for General Duties Medical Officers.ConclusionsThe type of suture used made no difference, but the traditional ‘Roman Sandal’ method was insecure. Knots tied close to the skin and those that bit into the drain were shown to be most effective.
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Howes RJ, Calder A, Hollingsworth A, Jones A. The end for the 'Roman Sandal': an observational study of methods of securing chest drains in a deployed military setting. J R Nav Med Serv 2015; 101:42-46. [PMID: 26292392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
INTRODUCTION There is ongoing debate regarding the optimal method of securing chest drains in trauma patients. Various courses describe methods for chest drain insertion, but little has been published to identify the best method to secure the drain. AIM This article aims to examine differences in approach to securing chest drains and the security of the methods used. METHOD Whilst in a deployed medical treatment facility, 26 clinicians from various specialties and nationalities were asked to secure a pre-placed drain. A 32F drain was placed in a manikin and the clinicians were given a chance to prepare their equipment. They were given a choice of suture and their attempts were observed by one of the researchers. The attempts were timed and photographed. A second researcher, who had not observed the technique, then assessed the security of the drain. RESULTS 15/26 clinicians used a 'Roman Sandal' technique with 5/26 proving to be insecure. Other techniques used showed no failure. The rate of consultant-secured failure was 12.5% compared to 40% for registrars and 33% for General Duties Medical Officers. CONCLUSIONS The type of suture used made no difference, but the traditional 'Roman Sandal' method was insecure. Knots tied close to the skin and those that bit into the drain were shown to be most effective.
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Burton N, Jeffery L, Calder A, Rhodes G. Adaptation to an average expression improves discrimination of facial expressions. J Vis 2014. [DOI: 10.1167/14.10.815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Howes RJ, Wood AM, Calder A, Cowan H, Burrows H. The management of the acutely swollen ankle. J R Nav Med Serv 2014; 100:288-292. [PMID: 25895409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Patients presenting with an acutely swollen ankle are common in both the military and civilian settings. Accurate diagnosis is vital, as there are various potentially serious causes. This article aims to review the common causes of an acutely swollen ankle, as well as the rarer causes, with their significant consequences.
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Mareschal I, Calder A, Clifford C. A prior for direct gaze. J Vis 2013. [DOI: 10.1167/13.9.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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15
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Calder A, Roth-Albin I, Bhatia S, Pilquil C, Lee JH, Bhatia M, Levadoux-Martin M, McNicol J, Russell J, Collins T, Draper JS. Lengthened G1 phase indicates differentiation status in human embryonic stem cells. Stem Cells Dev 2012; 22:279-95. [PMID: 22827698 DOI: 10.1089/scd.2012.0168] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The cell cycle in pluripotent stem cells is notable for the brevity of the G1 phase, permitting rapid proliferation and reducing the duration of differentiation signal sensitivity associated with the G1 phase. Changes in the length of G1 phase are understood to accompany the differentiation of human embryonic stem cells (hESCs), but the timing and extent of such changes are poorly defined. Understanding the early steps governing the differentiation of hESCs will facilitate better control over differentiation for regenerative medicine and drug discovery applications. Here we report the first use of real-time cell cycle reporters in hESCs. We coexpressed the chromatin-decorating H2B-GFP fusion protein and the fluorescence ubiquitination cell cycle indicator (FUCCI)-G1 fusion protein, a G1 phase-specific reporter, in hESCs to measure the cell cycle status in live cells. We found that FUCCI-G1 expression is weakly detected in undifferentiated hESCs, but rapidly increases upon differentiation. hESCs in the G1 phase display a reduction in undifferentiated colony-initiating cell function, underscoring the relationship between G1 phase residence and differentiation. Importantly, we demonstrate inter- and intracolony variation in response to chemicals that induce differentiation, implying extensive cell-cell variation in the threshold necessary to alter the G1 phase length. Finally, gain of differentiation markers appears to be coincident with G1 phase lengthening, with distinct G1 phase profiles associated with different markers of early hESC differentiation. Our data demonstrate the tight coupling of cell cycle changes to hESC differentiation, and highlight the cell cycle reporter system and assays we have implemented as a novel avenue for investigating pluripotency and differentiation.
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Affiliation(s)
- Ashley Calder
- McMaster Stem Cell and Cancer Research Institute, Michael G. DeGroote School of Medicine, McMaster University , Hamilton, Ontario, Canada
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Calder A, Seach N, Fletcher A, Hammett M, Boyd R, Chidgey A. Androgen reduction and mesenchymal stem cell therapies improve kinetics of thymic epithelial cell recovery following chemotherapy. Placenta 2011. [DOI: 10.1016/j.placenta.2011.07.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Ewbank M, Henson R, Rowe J, Calder A. Different neural mechanisms underlie repetition suppression to facial identity for same-size and different-size faces in the occipitotemporal lobe. J Vis 2011. [DOI: 10.1167/11.11.640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Owens CM, Aurora P, Stanojevic S, Bush A, Wade A, Oliver C, Calder A, Price J, Carr SB, Shankar A, Stocks J. Lung Clearance Index and HRCT are complementary markers of lung abnormalities in young children with CF. Thorax 2011; 66:481-8. [PMID: 21422040 DOI: 10.1136/thx.2010.150375] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
RATIONALE High resolution computed tomography (HRCT) is a more sensitive tool for detecting early cystic fibrosis (CF) lung disease than either spirometry or plain radiography, but its relationship to other measures of lung function has not been established in young children. OBJECTIVES (1) To assess whether the lung clearance index (LCI) derived from multiple breath inert-gas washout (MBW) is as effective as HRCT in identifying pulmonary abnormalities; and (2) explore the relationships between abnormalities detected by HRCT and by spirometry, plethysmography and MBW (collectively, LFTs) in young children with CF. METHODS Children with CF underwent LFTs and volumetric HRCT on the same day. Healthy age-matched controls underwent identical LFTs without HRCT. Scans were anonymised, and scored using the Brody-II CT scoring system, to assess for presence and extent of bronchiectasis, airway wall thickening, mucus plugging, and parenchymal opacities. RESULTS Assessments were undertaken in 60 children with CF (mean (SD) 7.8 (1.3 years) and 54 healthy controls (7.9 (1.2) y). Among children with CF, 84% (47/56) had abnormal LCI, 58% (27/47) abnormal plethysmographic lung volumes (FRC(pleth) or RV), 35% (21/60) abnormal sRaw and 47% (28/60) abnormal spirometry (FEV1 or FEF(25-75)); whereas HRCT scans were abnormal in 85% (51/60): median total Brody-II score: 9.5% (range 0-51%). Total CT score correlated more strongly with LCI (Spearman correlation = 0.77) than with spirometry (R = -0.43) or any other marker of lung function. Of the nine children with normal LCI, five had abnormalities on HRCT, whereas five children with normal HRCT had raised LCI. CONCLUSIONS These results suggest that while LCI and HRCT have similar sensitivity to detect CF lung disease, complimentary information may be gained in individual patients.
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Affiliation(s)
- C M Owens
- Department of Paediatric Radiology, Great Ormond Street Hospital for Children NHS Trust, London, UK
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McKeown A, Strachan L, Keeley P, Booth MG, Calder A, Panicker A. Unsuitable for ICU: what happens next? Crit Care 2010. [PMCID: PMC2934394 DOI: 10.1186/cc8647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Leães R, Cambraia R, Bacim F, Dalmarco G, Calder A, De Azevedo DFG, Pinho M, Russomano T. Development of walking pattern evaluation system for hypogravity simulation. Conf Proc IEEE Eng Med Biol Soc 2007; 2006:6285-8. [PMID: 17947187 DOI: 10.1109/iembs.2006.260726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study aimed to develop a Walking Pattern Evaluation System during Hypogravity Simulation (SAMSH), which included the adaptation of a body suspension device, the instrumentation of a treadmill and the development of a virtual environment. SAMSH was developed using one subject. Kinematic analyses were performed whilst one individual was walking on the treadmill during body weight reduction simulating the gravitational forces of the Moon (reduction of 60%) and Mars (reduction of 30%) with and without virtual reality glasses (Head Mounted Display, HMD). The walking pattern was evaluated by means of knee and ankle electrogoniometers, foot switches placed on the front and back part of the plantar region, and five video cameras. Results showed that the body weight reduction during Moon simulation alter the walking pattern, including the increase in step time, contact time, step length and aerial time, and the decrease of walking cadence time (steps per minute). The findings of this study also suggested that hypogravity simulation reduces walking effort. The utilization of the HMD allowed the evaluation of the head position three-dimensionally during hypogravity simulation. The virtual environment reduced postural balance, due to the absence of visual input, which was evidenced by a protective extension reaction.
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Affiliation(s)
- R Leães
- Microgravity Lab., Pontifical Catholic Univ., Porto Alegre, RS, Brazil
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Calder A, Dursi J, Fryxell B, Plewa T, Weirs G, Dupont T, Robey H, Kane J, Drake P, Remington B, Dimonte G, Hayes J, Stone J, Ricker P, Timmes F, Zingale M, Olson K. Validating astrophysical simulation codes. Comput Sci Eng 2004. [DOI: 10.1109/mcse.2004.44] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Calder A, Forrester AR, James PG, Luckhurst GR. Nitroxide radicals. V. N,N'-Di-tert-butyl-m-phenylenebinitroxide, a stable triplet. J Am Chem Soc 2002. [DOI: 10.1021/ja01042a006] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kane JO, Robey HF, Remington BA, Drake RP, Knauer J, Ryutov DD, Louis H, Teyssier R, Hurricane O, Arnett D, Rosner R, Calder A. Interface imprinting by a rippled shock using an intense laser. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 63:055401. [PMID: 11414953 DOI: 10.1103/physreve.63.055401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2000] [Indexed: 05/23/2023]
Abstract
Perturbation imprinting at a flat interface by a rippled shock has been observed in a laser hydrodynamics experiment. A strong shock was driven through a three-layer target, with the first interface rippled, and the second flat. The chosen thickness of the second layer gave instability growth with opposite phases at the two interfaces, consistent with two-dimensional simulations and rippled shock theory.
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Affiliation(s)
- J O Kane
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Penney G, Calder A. The Scottish Programme for Clinical Effectiveness in Reproductive Health (SPCERH): lessons from a three-year programme. Health Bull (Edinb) 2000; 58:261-6. [PMID: 12813805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
OBJECTIVE To describe the work of the Scottish Programme for Clinical Effectiveness in Reproductive Health (SPCERH) in order to draw lessons applicable to other clinical effectiveness programmes. DESIGN Overview of an integrated clinical effectiveness programme relating to reproductive health. SETTING Scotland. SUBJECTS The programme is designed to reach all professionals who share responsibility for reproductive healthcare--including obstetrician/gynaecologists, midwives, general practitioners, family planning doctors, commissioners of services and NHS managers. RESULTS During its first three-year Workplan, SPCERH has conducted an integrated programme of audit, guideline and educational activities. Findings have been disseminated using multi-faceted approaches including publications, presentations and interactive meetings. Evidence from surveys undertaken within the Programme indicates that clinicians have changed or reconsidered their practice in several key areas in response to audit and guideline recommendations made by the Programme. CONCLUSIONS As a way of funding and organising clinical effectiveness activities, the integrated Programme has many advantages over the stand-alone Project. These advantages include: enabling the linkage of national audits to national guidelines and other forms of NHS guidance; enabling the re-audit of topics after a time interval sufficient to allow for the implementation of change; the building of expertise within a dedicated team and the use of that expertise across a range of linked projects; the availability of an experienced team which can respond to new priority issues at short notice.
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Affiliation(s)
- G Penney
- Dugald Baird Centre, Aberdeen Maternity Hospital, Cornhill Road, Aberdeen
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Rosner R, Calder A, Dursi J, Fryxell B, Lamb D, Niemeyer J, Olson K, Ricker P, Timmes F, Truran J, Tueo H, Yuan-Nan Young, Zingale M, Lusk E, Stevens R. Flash code: studying astrophysical thermonuclear flashes. Comput Sci Eng 2000. [DOI: 10.1109/5992.825747] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Farish E, Barnes JF, Fletcher CD, Ekevall K, Calder A, Hart DM. Effects of tibolone on serum lipoprotein and apolipoprotein levels compared with a cyclical estrogen/progestogen regimen. Menopause 1999; 6:98-104. [PMID: 10374215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
OBJECTIVE The purpose of the study was to examine the effects of tibolone, a synthetic steroid that alleviates climacteric symptoms and prevents bone loss without inducing monthly bleeds, on lipoprotein cardiovascular risk markers and to compare the effects with those of a standard combined estrogen/progestogen preparation. DESIGN Ninety-seven postmenopausal women were randomly allocated to receive either tibolone 2.5 mg/day or conjugated equine estrogens 0.625 mg/day with norgestrel 0.15 mg/day for 12 of each 28 days. Fasting serum levels of lipids, lipoproteins, and apolipoproteins (Apo) were monitored during 18 months of treatment. Women on the cyclical preparation had levels determined during both estrogen-only and combined phases. RESULTS Tibolone caused reductions in triglycerides (33%, p < 0.001), very low density lipoprotein (VLDL) cholesterol (43%, p < 0.001), and high density lipoprotein (HDL) cholesterol (18%, p < 0.001). The HDL2/HDL3 ratio fell by 22% (p < 0.001). Levels of Apo AI and AII were reduced by 18 and 8%, respectively (p < 0.001). The combined preparation caused reductions in VLDL cholesterol (23%, p < 0.001) and low density lipoprotein cholesterol (15%, p < 0.001). There were small reductions in HDL3 cholesterol and in Apo AII and Apo B. All parameters, except for Apo AII and Apo B and lipoprotein (a) [Lp (a)], showed cyclical changes. Lp (a) levels were reduced significantly by both treatments. CONCLUSIONS The cyclical preparation had potentially beneficial effects on LP risk markers. The reduction in HDL induced by tibolone constitutes a potentially adverse change, which may be offset by the substantial falls in triglycerides, VLDL cholesterol, and Lp (a).
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Affiliation(s)
- E Farish
- Department of Biochemistry, Stobhill NHS Trust, Scotland, UK
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Brennand J, Leask R, Kelly R, Greer I, Calder A. The influence of amniotic fluid on prostaglandin synthesis and metabolism in human fetal membranes. Acta Obstet Gynecol Scand 1998; 77:142-50. [PMID: 9512316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To investigate the effect of amniotic fluid on prostaglandin synthesis and metabolism in the fetal membranes. DESIGN A cell culture study of amnion and chorion obtained at elective cesarean section incubated with amniotic fluid collected following either spontaneous labor and delivery, or elective cesarean section. SUBJECTS Forty-eight pregnant women at 3742 weeks gestation: 24 in spontaneous labor and 24 delivered by elective cesarean section. RESULTS Significantly more PGE2 and PGF2alpha were produced by amnion and chorion treated with amniotic fluid from spontaneous labor compared with elective cesarean section. Spontaneous labor amniotic fluid favors PGE2 and PGFM production by amnion and chorion respectively; while elective section fluid stimulates PGE2 synthesis by both tissues (reflected as PGEM in chorion). Amniotic fluid, from either spontaneous labor or elective section, had no effect on the metabolism of exogenous PGE2 or PGF2alpha by chorion cells. CONCLUSION Spontaneous labor is associated with the presence of a substance in amniotic fluid which facilitates prostaglandin synthesis in the fetal membranes, but which is without effect on prostaglandin metabolism.
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Affiliation(s)
- J Brennand
- Department of Obstetrics and Gynaecology, University of Glasgow, UK
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Piegsa K, Calder A, Davis JA, McKay-Hart D, Wells M, Bryden F. Endometrial status in post-menopausal women on long-term continuous combined hormone replacement therapy (Kliofem). A comparative study of endometrial biopsy, outpatient hysteroscopy and transvaginal ultrasound. Eur J Obstet Gynecol Reprod Biol 1997; 72:175-80. [PMID: 9134398 DOI: 10.1016/s0301-2115(96)02670-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Forty post-menopause women using a preparation of 2 mg 17 beta-oestradiol and 1 mg norethisterone acetate (Kliofem) for a mean duration of 2.9 years were investigated in an open, prospective, method comparison study. Main outcome measures were the histology of endometrial biopsy in comparison with clinical evaluation of the endometrium during panoramic hysteroscopy and endometrial thickness measured by transvaginal ultrasound. Thirty-six women had either an inactive atrophic or unassessable endometrial biopsy, the remaining four (10%) showed benign endometrial changes. In the majority of patients the endometrium had a thin and regular appearance on hysteroscopy (92.5% of cases) with an endometrial thickness not exceeding 7 mm (90% of cases). Non-agreement between histology and hysteroscopy or transvaginal ultrasound findings was associated with the presence of polyps and submucosal fibroids, or innocuous endometrial changes such as a pseudodecidual pattern. No case of malignancy was encountered in any patient in this study. The present study suggests that continuous combined hormone replacement therapy appears to be safe with regard to endometrial health. In the majority of women an inactive endometrium or non-assessable biopsy result will be encountered. However, the numbers examined here are small and endometrial carcinoma has been reported to occur. Continuing follow-up of patients on continuous combined HRT is therefore essential.
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Affiliation(s)
- K Piegsa
- Department of Gynaecology, Stobhill General Hospital, Glasgow, UK
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Chilibeck PD, Calder A, Sale DG, Webber CE. Twenty weeks of weight training increases lean tissue mass but not bone mineral mass or density in healthy, active young women. Can J Physiol Pharmacol 1996; 74:1180-5. [PMID: 9022839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Twenty young women (20.3 +/- 1.0 years) participated in a weight training program in which upper and lower body exercises were done twice per week for 20 weeks. Ten other women (20.2 +/- 0.4 years) served as a control group. Training resulted in significant (p < 0.05) increases in arm curl (73%), bench press (33%), and leg press (23%) lifting performance. Whole body (3.7%), trunk (3.0%), arm (9.7%), and leg (3.3%) lean tissue mass also increased significantly, based on measurements made by dual energy x-ray absorptiometry (DEXA). Changes in the control group were small and nonsignificant. In contrast, training did not increase DEXA-measured bone mineral content (BMC) and density (BMD) in a whole body measure nor in arm, leg, ribs, thoracic and lumbar spine, and pelvis segments. Similarly, hip BMC and BMD at femoral neck, trochanter, intertrochanter, and Ward's triangle sites, and total hip did not increase with training. The data indicate that a resistance training program that effectively increases strength and lean tissue mass in young women may fail to increase BMC or BMD over a 20-week training period.
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Affiliation(s)
- P D Chilibeck
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
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Chilibeck PD, Calder A, Sale DG, Webber CE. Twenty weeks of weight training increases lean tissue mass but not bone mineral mass or density in healthy, active young women. Can J Physiol Pharmacol 1996. [DOI: 10.1139/y96-122] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Farish E, Spowart K, Barnes JF, Fletcher CD, Calder A, Brown A, Hart DM. Effects of postmenopausal hormone replacement therapy on lipoproteins including lipoprotein(a) and LDL subfractions. Atherosclerosis 1996; 126:77-84. [PMID: 8879436 DOI: 10.1016/0021-9150(96)05895-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The purpose of this study was to examine the effects on lipoprotein risk markers for CHD of oestradiol given alone and in combination with the androgenic progestogen, norethisterone. Eighty postmenopausal women were randomly allocated to receive oestradiol (2 mg/day) alone or with continuous norethisterone (1 mg/day). Serum lipoprotein levels, including lipoprotein(a), were monitored during 12 months on treatment in all the women, and in a sub-set of 32 patients cholesterol was measured in the two major density subfractions of LDL. Oestradiol caused a transient rise in triglycerides, a small decrease in LDL cholesterol (significant only at 3 and 6 months, P < 0.05) and a consistent significant increase in HDL cholesterol (16%, P < 0.01). There was a downward trend in lipoprotein(a) levels which did not achieve statistical significance. The combined preparation caused significant, sustained decreases in triglycerides (31%, P < 0.01), total cholesterol (15%, P < 0.001), VLDL (42%, P < 0.01), LDL (9%, P < 0.05) and HDL (11%, P < 0.001). Lipoprotein(a) was also reduced (39%, P < 0.05). In the sub-set of patients in which LDL subfractions were measured, the reduction in LDL induced by oestradiol monotherapy was significant only at the 3-month visit (6%, P < 0.05). This was due to a decrease in the 'light' (1.025 < d < 1.044 g/ml) subfraction (10%, P < 0.05) and resulted in an apparent shift in subfraction distribution towards the 'heavy' (1.044 < d < 1.060 g/ml) subfraction, although there was no absolute increase in the latter. None of these changes was statistically significant at 12 months. Oestradiol/norethisterone caused sustained decreases in both 'light' (15%, P < 0.05) and 'heavy' (29%, P < 0.05) subfractions, with no significant change in the relative amounts. The changes in 'light' and 'heavy' LDL in this group were highly correlated with changes in triglyceride levels (r = -0.57, P < 0.05 and r = 0.82, P < 0.01 respectively). Therefore, at the end of 1 year's treatment with unopposed oestradiol the only statistically significant change was an increase in HDL cholesterol. Addition of norethisterone to the preparation reversed this potentially beneficial change, but favourably influenced triglycerides, VLDL, LDL subfraction profile and lipoprotein(a), which may counteract the adverse effect on HDL.
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Affiliation(s)
- E Farish
- Department of Biochemistry, Stobhill NHS Trust Glasgow, Scotland, UK
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Abstract
Burton and Bruce's (1992) model of face naming predicts a "fan effect", in which naming of famous people about whom many descriptive properties are known should be slower than naming of celebrities about whom few properties are known. An experiment is reported that showed that, contrary to this prediction, knowledge of many descriptive properties facilitated face-naming latency. An alternative architecture for an interactive activation model is proposed in which descriptive properties are represented in separate pools of units for each domain of information and in which names are represented by a separate pool of lexical output units. Computer simulations showed that this model could simulate the previously available empirical data as effectively as Burton and Bruce's (1992) original model. However, the proposed model could also simulate the effect of the number of known descriptive properties upon face-naming latency observed in the experiment reported. The new architecture also has the advantage of being more compatible with current models of speech production, and it allows preserved access to unique semantic properties in the context of impaired face naming as reported in the neuropsychological literature.
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Affiliation(s)
- S Brédart
- Department of Psychology, University of Liège, Belgium
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Chilibeck P, Calder A, Sale DG, Webber C. Reproducibility of dual-energy x-ray absorptiometry. Can Assoc Radiol J 1994; 45:297-302. [PMID: 8062121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The purpose of this investigation was to determine the short-term reproducibility of measurements of whole-body and subregion bone mass and density, as well as body composition, made by dual energy x-ray absorptiometry. Bone mineral content, bone mineral density and body composition were measured on two occasions, 1 to 2 weeks apart, in 21 women (average age, 20.9 [standard deviation 1.6] years). The method errors of the duplicate measurements, expressed as a percentage of the combined mean values from the two sets of measurements (i.e., as a coefficient of variation), for whole-body bone mineral content, bone mineral density, lean tissue mass and fat mass were 1.6%, 1.1%, 1.4% and 1.8% respectively. The method errors for bone mineral density in the hip were 2.2%, 1.1% and 2.5% for the neck, trochanter and Ward's triangle respectively. On the basis of the method errors and the expected treatment effects, the sample sizes needed for intervention trials (e.g., exercise training) were calculated. All of the whole-body and most of the subregion bone mineral density and lean tissue mass measurements made by dual-energy x-ray absorptiometry were sufficient for detecting the small changes (about 2%) expected in trials with 20 subjects, whereas measurements of subregion bone mineral content and fat mass were less precise.
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Affiliation(s)
- P Chilibeck
- Department of Kinesiology, McMaster University, Hamilton, Ont
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Chilibeck P, Calder A, Sale O, Webber C. 257 COMPARISON OF STRENGTH AND MUSCLE MASS INCREASES DURING RESISTANCE TRAINING IN YOUNG WOMEN. Med Sci Sports Exerc 1993. [DOI: 10.1249/00005768-199305001-00259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fairlie F, Phillips G, McLaren M, Calder A, Walker J. Uterine activity in spontaneous labour and maternal peripheral plasma prostaglandin E2 and F2 alpha metabolites. J Perinat Med 1993; 21:35-42. [PMID: 8487148 DOI: 10.1515/jpme.1993.21.1.35] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The relationship between maternal peripheral plasma concentrations of prostaglandin E2 and prostaglandin F2 alpha metabolites (bicyclo-PGEM and PGFM respectively) and the level of uterine activity in spontaneous labour was studied in 10 nulliparous and 10 multiparous women. Plasma prostaglandin metabolites were measured by radioimmunoassay. Uterine activity was quantified by computer analysis of changes in intrauterine pressure and expressed as mean active pressure (MAP). As labour progressed, both parity groups showed a significant rise in MAP which was associated with a significant increase in the levels of PGFM. However, the percentage rise in PGFM did not significantly correlate with the percentage rise in MAP. At all stages in labour PGFM and MAP levels were higher in the nulliparous group compared with the multiparous group. Bicyclo-PGEM levels showed no significant change in the nulliparous group but rose in late first stage/second stage in the multiparous group. Our observations support a role for prostaglandin F2 alpha in the generation of uterine activity in spontaneous labour. However, further study is required to elucidate the mechanisms controlling prostaglandin production by the fetal membranes and decidua in vivo, and how this relates to maternal peripheral plasma prostaglandin metabolite concentrations and the level of uterine activity.
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Affiliation(s)
- F Fairlie
- Perinatal Research Centre, Glasgow, Royal Maternity Hospital, Rottenrow, Scotland
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Calder A, Chilibeck P, Sale D, Webber C. UPPER BUT NOT LOWER LIMB LATERAL ASYMMETRY IN LEAN MASS AND BONE MINERAL DENSITY IN YOUNG WOMEN. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-00271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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James D, Peralta B, Porter S, Darvill D, Walker J, McCall M, Calder A, O'Brien S, Beveridge R, Liu D. Fetal heart rate monitoring by telephone. II. Clinical experience in four centres with a commercially produced system. Br J Obstet Gynaecol 1988; 95:1024-9. [PMID: 3191040 DOI: 10.1111/j.1471-0528.1988.tb06508.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A commercially produced domiciliary fetal monitoring (DFM) system was assessed in four centres in the UK (Bristol, Glasgow, London and Nottingham) chosen to allow for comprehensive assessment in various settings in many different women. Overall, 825 recordings were made from 368 women (2.24 per woman). There were 56 unsuccessful attempts at transmission (6.8%), most were due to problems with telephone equipment. The system worked most efficiently when a dedicated direct line was used. The data transmission time varied between 40 and 60 s. The median telephone time (including data transmission and conversation) with a dedicated direct line was 7 min. Mean acceptance times from the four centres were between 70 and 80%. All recordings with acceptance times of 40% or more were interpretable. Ten recordings were abnormal. The women and mid-wives were equally proficient at using the DFM system. The DFM system represents an important addition to current methods of fetal assessment. Specific guidelines are outlined.
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Affiliation(s)
- D James
- Domiciliary Fetal Monitoring Field Trial Group, Southmead Hospital, Bristol
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Calder A. Poverty: a new trap is laid. Health Serv J 1988; 98:362-3. [PMID: 10286831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Calder A, Forrester AR. Nitroxide radicals. Part VI. Stability of meta- and para-alkyl substituted phenyl-t-butylnitroxides. ACTA ACUST UNITED AC 1969. [DOI: 10.1039/j39690001459] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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