Physical activity intensity, bout-duration, and cardiometabolic risk markers in children and adolescents
Tarp J, Child A, White T, Westgate K, Bugge A, Grontved A, et al.
13 July 2018
In this study the researchers wanted to determine the role of physical activity intensity and bout-duration in modulating associations between physical activity and cardiometabolic risk markers.
Cardiovascular disease accounted for 17.6 million deaths worldwide in 2016, making it the leading cause of non-communicable disease mortality. While the disease is generally a concern in adulthood, cardiometabolic risk factors may be present from a much earlier age, for example endothelial damage that leads to atherosclerosis can develop during adolescence. In addition, previous evidence suggests cardiometabolic risk factors may track from childhood and adolescence into adulthood. This makes it important to understand the modifiable determinants of cardiometabolic risk factors in young people. One such determinant is participation in physical activity.
Current national and international physical activity guidelines recommend adults should accumulate moderate-to-vigorous physical activity (MVPA) or vigorous physical activity in bouts of at least 10 min duration. For children and adolescents, a daily total of at least 60 min of MVPA is recommended but many countries (including the U.S., U.K., Australia, and Canada) do not specify any minimum bout-duration for MVPA.
Providing the optimal guidance on how to perform health-enhancing physical activity is important for authorities and clinicians. However, whether short bouts of activity confer similar benefits to longer durations remains unclear and available evidence on this issue remains scarce in young people. Accelerometry is currently the de facto standard of objective physical activity assessment in large-scale epidemiological studies. It is well-established that accelerometry-determined MVPA levels are highly influenced by the choice of intensity threshold but it has not been sufficiently explored how varying the intensity threshold impacts on associations with cardiometabolic risk factors.
Further, whether higher (or lower) intensity physical activity may be particularly beneficial for cardiometabolic risk factors at longer bout-durations has yet to be examined.
Therefore, the purpose of this study was to assess how physical activity of different intensities and accumulated in bouts of varying duration relates to cardiometabolic health in young people.View publication
Risk factors for longer-term mortality in discharged patients with dementia and SARS-CoV-2 infection: a matched case–control study.
Publication: Journal of Alzheimer’s Disease
Chen S, Cardinal RN, Gräf S, O’Brien JT, Underwood BR
28 January 2023
We examined longer-term mortality in patients with dementia and SARS-CoV-2 infection. We found an increased mortality in patients with dementia beyond the acute phase of illness. We identified several investigation results associated with increased mortality, and increased mortality in patients prescribed antipsychotics or benzodiazepines.View publication
Publication: Frontiers in Psychiatry
Hannah LA, Walsh CM, Perez J, Jopling L, Cardinal RN, Cameron R
16 February 2023
Economic evidence for interventions in treatment-resistant depression is underdeveloped, particularly so for service-level interventions. Where evidence does exist, it is hampered by inconsistency in study design, methodological quality, and availability of high quality long-term outcomes evidence. This review identifies a number of key considerations and challenges for the design of future economic evaluations. Recommendations for research and suggestions for good practice are made.View publication
Maura Malpetti, Thomas E. Cope, Duncan Street, P. Simon Jones, Frank H. Hezemans, Elijah Mak, Kamen A. Tsvetanov, Timothy Rittman, W. Richard Bevan-Jones, Karalyn Patterson, Luca Passamonti, Tim D. Fryer, Young T. Hong, Franklin I. Aigbirhio, John T. O’Brien and James B. Rowe
08 March 2023
Brain scans like PET enable the visualisation and quantification of brain inflammation, which is an important and common pathological feature in dementia. Using PET we found that high levels of inflammation in frontal brain regions in people with frontotemporal dementia is associated with faster decline in their thinking performance over time. Our results highlight the potential for immunomodulatory treatment strategies in frontotemporal dementia.View publication
Using machine learning to model older adult inpatient trajectories from electronic health records data
Maria Herrero-Zazo, Tomas Fitzgerald, Vince Taylor, Helen Street, Afzal N. Chaudhry, John R. Bradley, Ewan Birney, Victoria L. Keevil
20 January 2023
- Time-series blood test & vital sign data from older inpatients were presented to HMM (Hidden Markov Models)
- Hidden clinically interpretable states were extracted, linked with diagnoses and death
- States modeled inpatient trajectories, differentiating risk from admission-discharge
- The clinical interpretation of HMM states helped explain how ML models organise data
Publication: Nature Nanotechnology
Filip Bošković, Jinbo Zhu, Ran Tivony, Alexander Ohmann, Kaikai Chen, Mohammed F. Alawami, Milan Đorđević, Niklas Ermann, Joana Pereira Dias, Michael Fairhead, Mark Howarth, Stephen Baker, Ulrich F. Keyser
16 January 2023
Respiratory infections are the major cause of death from infectious disease worldwide. Multiplexed diagnostic approaches are essential as many respiratory viruses have indistinguishable symptoms.
We created self-assembled DNA nanobait that can simultaneously identify multiple short RNA targets. The nanobait approach relies on specific target selection via toehold-mediated strand displacement and rapid read-out via nanopore sensing. Here, we show this platform can concurrently identify several common respiratory viruses, detecting a panel of short targets of viral nucleic acids from multiple viruses.
Our nanobait can be easily reprogrammed to discriminate viral variants, as we demonstrated for several key SARS-CoV-2 variants with single-nucleotide resolution. Lastly, we show that nanobait discriminates
between samples extracted from oropharyngeal swabs from negative and positive SARS-CoV-2 patients
Our system allows for multiplexed identification of native RNA molecules, providing a new scalable approach for diagnostics of multiple respiratory viruses in a single assay.View publication
Fully automated closed-loop insulin delivery in adults with type 2 diabetes: an open-label, single-center, randomized crossover trial
Publication: Nature Medicine
Aideen B. Daly, Charlotte K. Boughton, Munachiso Nwokolo, Sara Hartnell, Malgorzata E. Wilinska, Alina Cezar, Mark L. Evans & Roman Hovorka
12 January 2023
Cambridge scientists have successfully trialled an artificial pancreas for use by patients living with type 2 diabetes. The device – powered by an algorithm developed at the University of Cambridge – doubled the amount of time patients were in the target range for glucose and halved the time spent experiencing high glucose levels. Read the full news story.View publication
Longitudinal effect of clozapine-associated sedation on motivation in schizophrenia: naturalistic longitudinal study
Publication: British Journal of Psychiatry
Noham Wolpe, Shanquan Chen, Brian Kirkpatrick, Peter B. Jones, Christopher Jenkins, Rudolf N. Cardinal and Emilio Fernandez-Egea
10 January 2023
In a cohort of 187 people with schizophrenia treated with clozapine, we examined the relationship between clozapine, sedation, and aspects of symptoms: motivation/pleasure, and emotional expressivity. Clozapine was associated with increased sedation (a known side effect), and this sedation worsened motivation/pleasure; however, there was also a separate effect through which clozapine was directly associated with improved motivation/pleasure. These results highlight the important of addressing sedative side-effects of antipsychotic medications to improve quality of life.
Association between antidementia medication use and mortality in people diagnosed with dementia with Lewy bodies in the UK: a retrospective cohort study.
Publication: PLoS Medicine
Shanquan Chen, Annabel C Price, Rudolf N Cardinal, Sinéad Moylett, Anne D Kershenbaum, James Fitzgerald, Christoph Mueller, Robert Stewart, John T O’Brien
6 December 2022
In an observational study of people who had dementia with Lewy bodies, use of cholinesterase inhibitors (a symptomatic treatment) was associated with shorter duration of hospital admissions and decreased risk of mortality.View publication
Factors Associated with Significant Weight Loss in Hospitalised Patients with COVID-19: A Retrospective Cohort Study in a Large Teaching Hospital
Dimitra Zannidi, Pinal S. Patel, Eleni Leventea, Jessica Paciepnik, Frances Dobson, Caroline Heyes, Robert J. B. Goudie, Linda M. Oude Griep, Jacobus Preller, and Lynsey N. Spillman,
8 October 2022
Previous research has shown that people hospitalised with COVID-19 are at risk of weight loss and malnutrition. This study looked at patients who experienced weight loss of 10% or more during their hospital admission to Cambridge University Hospitals NHS with COVID-19 during the first wave of the pandemic. Weight loss of 10% or more is considered a large amount to lose as it increases the chance of someone becoming more poorly and not surviving. Therefore, preventing weight loss may help patients to survive and recover. The study looked at risk factors for weight loss to help better recognise the patients that need more support to prevent weight loss.View publication
Publication: European Heart Journal
Paddy C Dempsey, Alex V Rowlands, Tessa Strain, Francesco Zaccardi, Nathan Dawkins, Cameron Razieh, Melanie J Davies, Kamlesh K Khunti, Charlotte L Edwardson, Katrien Wijndaele, Soren Brage, Tom Yates
27 October 2022
Increasing physical activity of any intensity is beneficial for health, but new research published in the European Heart Journal shows that there is a greater reduction in cardiovascular disease risk when more of that activity is of at least moderate intensity.View publication
Edward J. Needham,, Alexander L. Ren, Richard J. Digby, Emma J. Norton, Soraya Ebrahimi, Joanne G. Outtrim, Doris A. Chatfield, Anne E. Manktelow, Maya M. Leibowitz, Virginia F. J. Newcombe, Rainer Doffinger, Gabriela Barcenas-Morales, Claudia Fonseca, Michael J. Taussig, Rowan M. Burnstein, Romit J. Samanta, Cordelia Dunai, Nyarie Sithole, Nicholas J. Ashton, Henrik Zetterberg, Magnus Gisslén, Arden Edén,, Emelie Marklund, Peter J. M. Openshaw, Jake Dunning, Michael J. Griffiths, Jonathan Cavanagh, Gerome Breen, Sarosh R. Irani,, Anne Elmer, Nathalie Kingston,, Charlotte Summers,, John R. Bradley,, Leonie S. Taams, Benedict D. Michael, Edward T. Bullmore, Kenneth G. C. Smith, Paul A. Lyons, Alasdair J. Coles, David K. Menon and the Cambridge NeuroCOVID Group, the CITIID-NIHR COVID- BioResource Collaboration and Cambridge NIHR Clinical Research Facility
6 September 2022
COVID-19 is associated with neurological complications including stroke, delirium and encephalitis. Furthermore, a post-viral syndrome dominated by neuropsychiatric symptoms is common, and is seemingly unrelated to COVID-19 severity. The true frequency and underlying mechanisms of neurological injury are unknown, but exaggerated host inflammatory responses appear to be a key driver of COVID-19 severity.
Researchers investigated the dynamics of, and relationship between, serum markers of brain injury (neurofilament light [NfL], glial fibrillary acidic protein [GFAP] and total tau) and markers of dysregulated host response (autoantibody production and cytokine profiles) in 175 patients admitted with COVID-19 and 45 patients with influenza.View publication
Unquantifiably low aldosterone concentrations are prevalent in hospitalised COVID-19 patients but may not be revealed by chemiluminescent immunoassay
Publication: Endocrine Connections
Martin Wiegand, David J Halsall, Sarah L Cowan, Kevin Taylor, Robert J B Goudie, Jacobus Preller, Mark Gurnell
26 August 2022
The renin-angiotensin-aldosterone system (RAAS) is of interest in understanding COVID-19. Using data extracted from CUH Epic, researchers observed profoundly low aldosterone levels (measured using gold-standard mass-spectrometry) in a large proportion of patients with COVID-19, which were not anticipated. The mechanism of this reduction remains obscure with no obvious correlation with obvious explanations. The profoundly low levels have likely not been detected previously since previous studies used immunoassays to measure aldosterone, in which there are high levels of interference in patients with COVID-19.View publication
The prognostic and discriminatory utility of the Clinical Frailty Scale and modified frailty Index compared to age
Ben Carter, Victoria L. Keevil, Atul Anand, Christopher N. Osuafor, Robert J. B. Goudie, Jacobus Preller, Matthew Lowry, Sarah Clunie, Susan D. Shenkin, Kathryn McCarthy, Jonathan Hewitt and Terence J. Quinn
24 August 2022
Assessing frailty in hospital patients is important but it is not clear how best to assess it. Researchers compared two options: the modified Frailty Index [mFI] and the Clinical Frailty Scale [CFS], and assessed how useful each were for predicting death in older adults (≥65 years) in hospital with COVID-19. Our work suggests the CFS is better than mFI at predicting death in patients who have COVID-19.View publication
Widespread cell stress and mitochondrial dysfunction occur in patients with early Alzheimer’s disease
Publication: Science Translational Medicine
Ashwin V. Venkataraman, Ayla Mansurgaia, Rizzo Courtney, Bishop, Yvonne Lewis, Ece Kocagoncu, Anne Lingford-Hughes, Mickael Huibanjan Passchier, James B. Rowe, Hideo Tsukada, David J. Brooks, Laurent Martarello, Robert A. Comley, Laigao Chen, Adam J.Schwarz, Richard Hargreaves, Roger N. Gunn, Eugenii A. Rabiner and Paul M. Matthews
18 August 2022
Researchers explored whether widespread cell stress and mitochondrial dysfunction occur in patients with early Alzheimer’s DiseaseView publication
Substantial somatic genomic variation and selection for BCOR mutations in human induced pluripotent stem cells
Publication: Nature Genetics
Foad J. Rouhani, Xueqing Zou, Petr Danecek, Cherif Badja, Tauanne Dias Amarante, Gene Koh, Qianxin Wu, Yasin Memari, Richard Durbin, Inigo Martincorena, Andrew R. Bassett, Daniel Gaffney & Serena Nik-Zainal
11 August 2022
DNA damage caused by factors such as ultraviolet radiation affect nearly three-quarters of all stem cell lines derived from human skin cells, say Cambridge researchers, who argue that whole genome sequencing is essential for confirming if cell lines are usable. Read the full news story.View publication
Evaluation of Dynamic Contrast-Enhanced MRI Measures of Lung Congestion and Endothelial Permeability in Heart Failure: A Prospective Method Validation Study
Joseph Cheriyan, Alexandra Roberts, Caleb Roberts, Martin J. Graves, Ilse Patterson,Rhys A. Slough,Rosemary Schroyer, Disala Fernando, Subramanya Kumar,Sarah Lee, Geoffrey J.M. Parker, Lea Sarov-Blat, Carmel McEniery, Jessica Middlemiss, Dennis Sprecher, Robert L. Janiczek
27 March 2022
Lung congestion is common in patients with heart failure. Enhanced MRI may be appropriate method for accurate measurement of lung fluid.View publication
Metabolomic Identification of a Novel, Externally Validated Predictive Test for Gestational Diabetes Mellitus
Publication: The Journal of Clinical Endocrinology & Metabolism
Ulla Sovio, Gemma L Clayton, Emma Cook, Francesca Gaccioli, D Stephen Charnock-Jones, Deborah A Lawlor, Gordon C S Smith
18 April 2022
Currently in the UK, women are selected for diagnostic testing for Gestational Diabetes Mellitus (GDM) based on risk factors such as obesity. Researchers developed a new predictive test for GDM using metabolomic markers from maternal serum samples, measured at multiple stages of pregnancy. The test was developed using samples from the Pregnancy Outcome Prediction (POP) study and it was externally validated in maternal plasma samples from a demographically highly dissimilar Born in Bradford (BiB) study. Further assessment in the POP study suggested that the predictive ability of a model including the metabolomic markers was clearly better compared to using early pregnancy obesity alone.View publication
Natalie E Adams, Amirhossein Jafarian, Alistair Perry, Matthew Rouse, Alexander D Shaw, Alexander G Murley, Thomas E Cope, W Richard Bevan-Jones, Luca Passamonti, Duncan Street, Negin Holland, David Nesbitt, Laura E Hughes, Karl J Friston, James RoweNatalie E Adams, Amirhossein Jafarian, Alistair Perry, Matthew Rouse, Alexander D Shaw, Alexander G Murley, Thomas E Cope, W Richard Bevan-Jones, Luca Passamonti, Duncan Street, Negin Holland, David Nesbitt, Laura E Hughes, Karl J Friston, James Rowe
23 June 2022
Synaptic loss occurs early in many neurodegenerative diseases and contributes to cognitive impairment even in the absence of gross atrophy. Currently, for human disease there are few formal models to explain how cortical networks underlying cognition are affected by synaptic loss. Researchers advocate that biophysical models of neurophysiology offer both a bridge from clinical to preclinical models of pathology, and quantitative assays for experimental medicine.View publication
Association of Collagen, Elastin, Glycosaminoglycans, and Macrophages With Tissue Ultimate Material Strength and Stretch in Human Thoracic Aortic Aneurysms: A Uniaxial Tension Study
Publication: J Biomech Eng.
Aziz Tokgoz, Shuo Wang, Priya Sastry, Chang Sun, Nichola L. Figg, Yuan Huang, Martin R. Bennett, Sanjay Sinha, Jonathan H. Gillard, Michael P. F. Sutcliffe, Zhongzhao Teng
25 April 2022
Fiber structures and pathological features, e.g., inflammation and glycosaminoglycan (GAG) deposition, are the primary determinants of aortic mechanical properties which are associated with the development of an aneurysm. This study is designed to quantify the association of tissue ultimate strength and extensibility with the structural percentage of different components, in particular, GAG, and local fiber orientation.View publication
Placental sex-dependent spermine synthesis regulates trophoblast gene expression through acetyl-coA metabolism and histone acetylation
Publication: Nature Communications Biology
Irving L. M. H. Aye, Sungsam Gong, Giulia Avellino, Roberta Barbagallo, Francesca Gaccioli, Benjamin J. Jenkins, Albert Koulman, Andrew J. Murray, D. Stephen Charnock-Jones & Gordon C. S. Smith
15 June 2022
Placental function and dysfunction differ by sex but the mechanisms are unknown. Researchers show that sex differences in polyamine metabolism are associated with escape from X chromosome inactivation of the gene encoding spermine synthase (SMS).View publication