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Intensive Lifestyle Intervention, Metabolomics, and Risk of Frailty Fracture in Overweight or Obese Patients with Type 2 Diabetes

Award Number: R01AG068232
ORGANIZATION: NATIONAL INSTITUTE ON AGING
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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Weight loss is critical to overweight or obese patients with type 2 diabetes (T2D) for improving glycemic control, cardiovascular risk factors, and quality of life. However, weight loss has been found to be associated with increased bone loss and risk for fractures by many studies, including the Action for Health in Diabetes (Look AHEAD) trial in which we observed an intensive lifestyle intervention (ILI) for weight loss was associated with 39% increased risk for frailty fracture (hip, pelvis, upper arm, or shoulder fractures) compared with diabetes support and education (DSE) (control group) among overweight or obese patients with T2D. Frailty fractures are devastating and represent a part of osteoporotic fracture types. We also observed the ILI was associated with increased bone loss in a subgroup of Look AHEAD who also had dual-energy X-ray absorptiometry (DXA) scans. However, the mechanisms linking the ILI and increased risk of fracture are still largely unknown but very important for developing effective methods for protecting bone and preventing fracture during intentional weight loss. The overall goal of this proposed study is to identify metabolomic changes which mediate the effect of ILI on the increased risk for frailty fracture in the Look AHEAD trial using a state-of-the-art liquid chromatography- mass spectrometry (LC-MS)-based metabolomics approach. In this study, we will include 4,659 Look AHEAD participants (2,357 in ILI and 2,302 in DSE) who had blood samples collected at both baseline and the 1-year visit and had a median follow-up of 11.3 years for fracture outcomes. Among those, 1,274 participants (642 in ILI and 632 in DSE) also had DXA scans for bone mineral density (BMD) at both baseline and year 1. In this study, we will further measure serum bone turnover markers (BTMs) and reanalyze DXA images to obtain the trabecular bone score (TBS) to evaluate bone metabolism and bone microarchitecture (an indicator of bone quality) in the DXA subgroup. A comprehensive two-stage metabolomics approach, including an untargeted/global metabolomics analysis with relative quantification followed by chemical structure validation and absolute quantification, will support the following Specific Aims: Aim 1) To examine the effects of ILI on changes in metabolomic profiles from baseline to year 1; Aim 2) To examine whether 1-year changes in metabolomic profiles are associated with and mediate the effect of ILI on the risk of frailty fracture; Aim 3) To examine whether 1-year changes in metabolomic profiles are associated with changes in BTMs, BMD, and TBS; and Aim 4) To examine whether baseline metabolomic profiles modify the effect of ILI on the risk of frailty fracture. The proposed study will provide comprehensive insights into the biological mechanisms underlying the increased risk of frailty fracture caused by the ILI. These findings will help discover molecular targets for blocking the detrimental effect of intentional weight loss on bone health. The study will also provide novel biomarkers for predicting the risk of frailty fracture and directing the personalization and optimization of lifestyle intervention for weight loss among overweight and obese patients with T2D.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2024 ( Subtotal = $612,270 )
2024	2024	UNIVERSITY OF TENNESSEE	62 S DUNLAP ST	MEMPHIS	TN	38103	SHELBY	USA	Aging Research	000	4	5/22/2024	NON-COMPETING CONTINUATION	$612,270
														Subtotal = $612,270

Issue Date FY: 2023 ( Subtotal = $616,677 )
2023	2023	UNIVERSITY OF TENNESSEE	62 S DUNLAP ST	MEMPHIS	TN	38103	SHELBY	USA	Aging Research	000	3	7/13/2023	NON-COMPETING CONTINUATION	$616,677
														Subtotal = $616,677

Issue Date FY: 2022 ( Subtotal = $609,703 )
2022	2022	UNIVERSITY OF TENNESSEE	62 S DUNLAP STREET STE 103	MEMPHIS	TN	38103	SHELBY	USA	Aging Research	001	2	8/22/2022	NON-COMPETING CONTINUATION	$6,457
2022	2022	UNIVERSITY OF TENNESSEE	62 S DUNLAP STREET STE 103	MEMPHIS	TN	38103	SHELBY	USA	Aging Research	000	2	7/6/2022	NON-COMPETING CONTINUATION	$603,246
														Subtotal = $609,703

Issue Date FY: 2021 ( Subtotal = $641,226 )
2021	2021	UNIVERSITY OF TENNESSEE	62 S DUNLAP STREET STE 103	MEMPHIS	TN	38103	SHELBY	USA	Aging Research	000	1	9/17/2021	NEW	$641,226
														Subtotal = $641,226

Grand Total All Awards = $2,479,876

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Intensive Lifestyle Intervention, Metabolomics, and Risk of Frailty Fracture in Overweight or Obese Patients with Type 2 Diabetes

Award Number: R01AG068232

ORGANIZATION: NATIONAL INSTITUTE ON AGING

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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