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Tang TY, Mak MYQ, Yap CJQ, Boey JEC, Chan SL, Soon SXY, Ishak IAB, Lee RWL, Soh XJ, Goh WX. An Observational Clinical Trial Examining the Effect of Topical Oxygen Therapy (Natrox ™) on the Rates of Healing of Chronic DiAbetic Foot Ulcers (OTONAL Trial). INT J LOW EXTR WOUND 2024; 23:326-337. [PMID: 34747267 PMCID: PMC11059837 DOI: 10.1177/15347346211053694] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/15/2021] [Accepted: 09/27/2021] [Indexed: 12/30/2022]
Abstract
Natrox™ topical oxygen therapy (TOT) (Inotec AMD Ltd, Cambridgeshire, UK) employs a small battery-powered "oxygen generator" to concentrate atmospheric oxygen and feeds pure, moist, oxygen through a fine, soft tube to a dressing-like "oxygen distribution system", which is placed over the wound and is held in place by a conventional dressing. The aim was to determine the effectiveness of Natrox™ for non-healing diabetic foot ulcers (DFU) over a 3-month period.Longitudinal, single-arm, open prospective registry study using 12 weeks of TOT using a 4 week run-in period. 20 patients recruited to OTONAL had chronic DFU greater than 3 months duration or minor amputation sites with less than 50% healing in 4 weeks.There were 13 (65%) males and the mean age was 65.7 (±11.6) years. The mean glycated haemoglobin (HbA1c) was 6.9 (±1.3) mmol mol-1 and mean wound duration before TOT was 114 (±79.1) days. 18/20 (90.0%) patients had concomitant lower limb revascularization angioplasty for chronic limb threatening ischaemia. The mean size of the foot ulcer at baseline was 11.3 ± 14.8 cm2 and mean transcutaneous oxygen measurement value was 34.1 (±19.6) mm Hg. Wound closure of >75% was observed in 14/20 (70.0%) patients. There was a 91.3% (±14.9%) wound area reduction by 3 months (P = .001) and mean time for 100% closure was 77.6 ± 32.5 days. Mean pain scores reduced from 2.4 (±1.8) at baseline to .5 (±1.0) at 3 months (P = .008). All patients were very satisfied using the ambulatory device. Use of TOT in chronic diabetic foot wounds stimulates a healing state, underpinning the concept that oxygen plays a central role in wound healing. Our results are more compelling if you consider they started with relatively large-sized DFUs and majority of patients were frail with underlying peripheral artery disease. (NCT03863054).
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Affiliation(s)
- Tjun Yip Tang
- Department of Vascular Surgery, Singapore General Hospital, Singapore
- Duke NUS Graduate Medical School, Singapore
| | | | - C. J. Q. Yap
- Department of Vascular Surgery, Singapore General Hospital, Singapore
| | - J. E. C. Boey
- Department of Podiatry, National University Hospital, Singapore
| | - Sze Ling Chan
- Health Services Research Center, SingHealth, Singapore
| | | | - I. A. B. Ishak
- Department of Podiatry, Singapore General Hospital, Singapore
| | - R. W. L. Lee
- Department of Podiatry, Singapore General Hospital, Singapore
| | - Xin Jie Soh
- Department of Podiatry, Singapore General Hospital, Singapore
| | - Wan Xi Goh
- Department of Podiatry, Singapore General Hospital, Singapore
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Dutta B, Loo S, Kam A, Tam JP. Plant-derived cell-penetrating microprotein α-astratide aM1 targets Akt signaling and alleviates insulin resistance. Cell Mol Life Sci 2023; 80:293. [PMID: 37715850 PMCID: PMC10505102 DOI: 10.1007/s00018-023-04937-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/18/2023]
Abstract
Insulin-resistant diabetes is a common metabolic disease with serious complications. Treatments directly addressing the underlying molecular mechanisms involving insulin resistance would be desirable. Our laboratory recently identified a proteolytic-resistant cystine-dense microprotein from huáng qí (Astragalus membranaceus) called α-astratide aM1, which shares high sequence homology to leginsulins. Here we show that aM1 is a cell-penetrating insulin mimetic, enters cells by endocytosis, and activates the PI3K/Akt signaling pathway independent of the insulin receptor leading to translocation of glucose transporter GLUT4 to the cell surface to promote glucose uptake. We also showed that aM1 alters gene expression, suppresses lipid synthesis and uptake, and inhibits intracellular lipid accumulation in myotubes and adipocytes. By reducing intracellular lipid accumulation and preventing lipid-induced, PKCθ-mediated degradation of IRS1/2, aM1 restores glucose uptake to overcome insulin resistance. These findings highlight the potential of aM1 as a lead for developing orally bioavailable insulin mimetics to expand options for treating diabetes.
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Affiliation(s)
- Bamaprasad Dutta
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Shining Loo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
- Academy of Pharmacy, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - Antony Kam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - James P Tam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
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Xu Y, Tan CWY, Tsou KYK, Tan DHY, Gallagher PJ, Lee JYC. Long-term clinical and cost-effectiveness of collaborative care in people with uncontrolled type 2 diabetes mellitus and polypharmacy: A multicenter randomized controlled trial. Prim Care Diabetes 2022; 16:188-195. [PMID: 34953748 DOI: 10.1016/j.pcd.2021.12.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/06/2021] [Accepted: 12/16/2021] [Indexed: 12/25/2022]
Abstract
AIMS This study examined the effectiveness of a collaborative care model on clinical and humanistic outcomes, medical cost, productivity loss, and its cost-effectiveness in managing uncontrolled Type 2 Diabetes Mellitus (T2DM). METHODS A randomized controlled study was conducted in two outpatient health institutions in Singapore. Patients aged above 21 years with HbA1c > 7% and polypharmacy were included. Eligible patients were randomized into the intervention (collaborative care) and control (usual care) arms. RESULTS A total of 255 patients were included in the analysis. Compared to the control arm, the intervention arm achieved significantly greater glycated hemoglobin (HbA1c) reduction (mean difference: 0.25, 95%CI: [0.001, 0.50], p = 0.049) and quality-adjusted life year (QALY) (+0.011, 95%CI: [0.003, 0.019], p = 0.011) at 12 months. The costs per additional HbA1c and QALY improvements over one year were $40.52 and $920.91 respectively. Activity impairment was lower in the intervention group both at 6 months (12.7% vs 19.0%; p = 0.022) and at 12 months (6.7% vs 14.0%; p = 0.008). CONCLUSIONS The collaborative care model achieved earlier HbA1c reduction and reduced patients' activity impairment without decreasing work productivity or increasing medical costs. This intervention is cost-effective for improving glycemic control and quality of life in patients with T2DM.
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Affiliation(s)
- Yingqi Xu
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore
| | | | | | | | - Paul John Gallagher
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore.
| | - Joyce Yu-Chia Lee
- Department of Clinical Pharmacy Practice, University of California, Irvine, United States.
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Yoon S, Ng JH, Kwan YH, Low LL. Healthcare Professionals' Views of Factors Influencing Diabetes Self-Management and the Utility of a mHealth Application and Its Features to Support Self-Care. Front Endocrinol (Lausanne) 2022; 13:793473. [PMID: 35282452 PMCID: PMC8907617 DOI: 10.3389/fendo.2022.793473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/28/2022] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION The perspectives of healthcare professionals (HCPs) are pivotal to co-development of self-management strategies for patients with diabetes. However, literature has been largely limited to perspectives of patients within the context of a Western healthcare setting. This study aims to explore factors influencing diabetes self-management in adult patients with diabetes from the perspectives of HCPs and their views of the value of mHealth application for diabetes self-management. MATERIALS AND METHODS We conducted focus group discussions (FGD) with purposively selected HCPs in Singapore. All FGDs were audio-recorded and transcribed verbatim. Thematic analysis was conducted using NVivo 12. RESULTS A total of 56 HCPs participated in the study. Barriers to self-management included limited patient commitment to lifestyle changes, suboptimal adherence to medication and treatment, patient resistance to insulin initiation and insufficient rapport between patients and HCPs. Patients' perceived susceptibility to complications, social support from family and community, multidisciplinary team care and patient's understanding of the benefits of self-care were viewed as facilitating self-management. HCPs saw mHealth apps as a vital opportunity to engage patients in the self-management of conditions and empower them to foster behavior changes. Yet, there were concerns regarding patient's limited digital literacy, lack of integration into routine electronic system and reluctance. DISCUSSION We identified a set of factors influencing self-management in adult patients with diabetes and useful app features that can empower patients to manage their conditions. Findings will inform the development of a mHealth application, and its features designed to improve self-care.
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Affiliation(s)
- Sungwon Yoon
- Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore
- Centre for Population Health Research and Implementation, SingHealth Regional Health System, Singapore, Singapore
| | - Jun Hao Ng
- Duke-NUS Medical School, Singapore, Singapore
| | - Yu Heng Kwan
- Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore
- Department of Pharmacy, National University of Singapore, Singapore, Singapore
- Internal Medicine Residency Programme, SingHealth Residency, Singapore, Singapore
| | - Lian Leng Low
- Centre for Population Health Research and Implementation, SingHealth Regional Health System, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
- Department of Family Medicine and Continuing Care, Singapore General Hospital, Singapore, Singapore
- Post-Acute and Continuing Care, Outram Community Hospital, Singapore, Singapore
- SingHealth Duke-NUS Family Medicine Academic Clinical Program, Singapore, Singapore
- *Correspondence: Lian Leng Low,
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Ang GY. Age of onset of diabetes and all-cause mortality. World J Diabetes 2020; 11:95-99. [PMID: 32313608 PMCID: PMC7156298 DOI: 10.4239/wjd.v11.i4.95] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/19/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023] Open
Abstract
Diabetes mellitus continues to present a large social, financial and health system burden across the world. The relationship between age of onset of the different types of diabetes and all-cause mortality is uncertain. In this review paper, the relationship between age of onset of the different types of diabetes and all-cause mortality will be reviewed and an update of the current evidence will be presented. There is strong evidence of the relationship between age of onset of type 2 diabetes mellitus (T2DM) and all-cause mortality, good evidence of the relationship between age of onset of T1DM and all-cause mortality and no evidence of the relationship between age of onset of gestational diabetes or prediabetes and all-cause mortality. Further research is needed to look at whether aggressive management of earlier onset of T2DM can help to reduce premature mortality.
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Affiliation(s)
- Gary Yee Ang
- Health Services and Outcomes Research, National Healthcare Group, Singapore 138543, Singapore
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Lim K, Chi C, Chan SY, Lim SL, Ang SM, Yoong JS, Tsai C, Wong SR, Yew TW, Tai ES, Yong EL. Smart Phone APP to Restore Optimal Weight (SPAROW): protocol for a randomised controlled trial for women with recent gestational diabetes. BMC Public Health 2019; 19:1287. [PMID: 31615456 PMCID: PMC6792195 DOI: 10.1186/s12889-019-7691-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 09/25/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Gestational diabetes (GDM) is a known risk factor for type 2 diabetes mellitus (T2DM), and women with a history of GDM have a 7-fold increased risk of developing the disease. Achieving a healthy weight post-delivery is key in reducing the risk of future diabetes in these women. The aim of this trial is to investigate the use of an interactive smartphone application (APP) to restore women to optimal weight following delivery. METHODS This will be an open-label randomized controlled trial. Two hundred women with gestational diabetes will be randomized to receive the intervention or standard care following delivery. Participants will be reviewed at 6 weeks and 4 months post-delivery. The intervention is an APP serving as a platform for weight, diet and physical activity tracking. The APP provides 3-5 min educational videos suggesting suitable lifestyle adjustments relevant to postnatal period such as breast feeding, diet and exercise. Lastly, the APP will allow real-time interaction between users and the team of dietitians, physiotherapists and occupational therapists to encourage restoration of optimal weight. Women in the control arm will be informed about the increased risk of developing T2DM and advised to maintain a healthy weight. Primary outcome measure is the restoration of participants' booking weight if booking BMI ≤ 23, or weight loss of at least 5% from booking weight if booking BMI > 23 over the 4 month period. Secondary outcome measures will assess serum metabolic and inflammatory markers, quality of life via questionnaires and cost-effectiveness of the intervention at each follow-up visit. DISCUSSION This will be the first randomised controlled trial investigating the use of a smartphone application for postpartum weight loss in women with gestational diabetes. The major ethnic groups in our study population represent the majority of ethnic groups in Asia, amongst which the prevalence of diabetes is high. If shown to be effective, this APP may be used in wider clinical settings to improve postpartum weight loss and reduce the risk of developing T2DM in these women. TRIAL REGISTRATION This study was registered on clintrials.gov on the 30th of October 2017, under the trial registration number: NCT03324737 .
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Affiliation(s)
- Karen Lim
- Department of Obstetrics and Gynecology, National University Hospital, National University of Singapore, Republic of Singapore
| | - Claudia Chi
- Department of Obstetrics and Gynecology, National University Hospital, National University of Singapore, Republic of Singapore
| | - Shiao-Yng Chan
- Department of Obstetrics and Gynecology, National University Hospital, National University of Singapore, Republic of Singapore
| | - Su Lin Lim
- Department of Dietetics, National University Hospital, National University of Singapore, Republic of Singapore
| | - Siew Min Ang
- Department of Dietetics, National University Hospital, National University of Singapore, Republic of Singapore
| | - Joanne S Yoong
- Saw Swee Hock School of Public Health, National University of Singapore, Republic of Singapore
| | - Cammy Tsai
- Department of Rehabilitation, National University Hospital, National University of Singapore, Republic of Singapore
| | - Su Ren Wong
- Department of Rehabilitation, National University Hospital, National University of Singapore, Republic of Singapore
| | - Tong Wei Yew
- Department of Medicine, National University Hospital, National University of Singapore, Republic of Singapore
| | - E Shyong Tai
- Department of Medicine, National University Hospital, National University of Singapore, Republic of Singapore
| | - Eu-Leong Yong
- Department of Obstetrics and Gynecology, National University Hospital, National University of Singapore, Republic of Singapore.
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