Cerebrovascular, Cognitive, Pro-Inflammatory, and Cardiometabolic Outcomes in Cancer Survivors With and Without Type II Diabetes Reporting Chemo-Brain: Baseline Differences and Impact of Activity

University of Oklahoma2 个研究点分布在 1 个国家目标入组 38 人开始时间: 2025年3月10日最近更新: 2026年5月1日

适应症

干预措施

试验速览

阶段: 不适用
状态: 招募中
发起方: University of Oklahoma
入组人数: 38
试验地点: 2
主要终点: Middle Cerebral Artery Velocity

研究概览研究设计入排标准研究组 & 干预措施结局指标研究者研究点记录与标识符相似试验

研究概览

简要总结

The growing U.S. cancer survivor population is projected to hit 26M by 2040. Chemotherapy represents an effective cancer treatment but can diminish cancer survivors' quality of life-particularly cognitive function-through select pathophysiological processes. Research on chemotherapy-induced cognitive impairment (hereafter, 'chemo-brain') is therefore critical. Chemotherapy disrupts immune system function and antioxidant regulation, causing inflammatory molecule release and damaging the brain's blood vessels. The brain's vascular function and, possibly, its neurons, are subsequently impaired-likely contributing to chemo-brain. Type 2 diabetes (T2D), a common cancer survivor comorbidity, shares underlying pathophysiology with chemo-brain. T2D-related insulin resistance can precipitate repeated high blood sugar episodes which increase inflammatory molecule release. In individuals with T2D without cancer, negative relationships are observed between inflammatory molecule concentrations and the brain's vascular and/or cognitive function. Cancer survivors with T2D might thus have higher chemo-brain risk than those without T2D. Yet, more research must compare how the brain's vascular function, as well as cognitive, inflammatory, and cardiometabolic indices, differ between these groups. Physical activity (PA) counteracts chemo-brain's and T2D's pathophysiology, with higher PA/fitness resulting in better vascular function of the brain, lower inflammatory molecule concentrations, and improved insulin sensitivity. We are therefore conducting a 30-participant quasi-experimental pilot study in cancer survivors with (cases) and without (controls) T2D. We will first investigate between-group differences in the brain's vascular function as well as cognitive, inflammatory, cardiometabolic, and epigenetic outcomes. We will then examine between-group changes in these outcomes and select psychosocial metrics during a 12-week technology-based PA program-potentially further elucidating involved mechanisms.

详细描述

While incident cancer cases of any site remain stable, 5-year cancer survival rates have increased. In January 2022, >18M individuals in the U.S. were CS-reflecting those diagnosed with cancer until death-with a projected increase to 26M by 2040. Although modern cancer treatments are effective, these treatments can worsen CS HRQoL. Several cancer treatments-most notably, chemotherapy-are associated with cognitive difficulties. While chemotherapy effectively treats many malignancies, it also negatively impacts vascular endothelial cells-leading to pathophysiological processes contributing to CS's oft-reported 'chemo-brain' during/after treatment. As CS populations grow, CICI mitigation research is crucial to improve HRQoL.

CICI likely occurs for several reasons. Chemotherapy can induce immune and antioxidant dysregulation. This dysregulation can lead to peripheral pro-inflammatory cytokines being released which damage and cross the blood-brain barrier-contributing to central pro-inflammatory cytokine release and causing neuroinflammation-related impairments in neurogenesis and the myelination process. Endothelial dysfunction and cerebral autoregulation failure can also result from this damage. Reviews suggest these mechanisms alter cerebrovascular function more broadly by impairing cerebral perfusion, glucose metabolism, and angiogenesis; thus contributing to CICI. T2D is both a risk factor for developing several common cancers and, given its prevalence, a common CS comorbidity heightening cancer recurrence risk. Several pathophysiological mechanisms underlying CICI are observed with T2D. Insulin resistance can result in repeated hyperglycemic episodes and subsequent pro-inflammatory cytokine elevation-possibly explaining why insulin resistance is correlated with diminished cerebrovascular and cognitive function in individuals with T2D. This might also explain why, in newly diagnosed CS with pro-inflammatory comorbidities (e.g., T2D), higher pro-inflammatory cytokines and poorer cognitive function have been observed relative to CS without comorbidities-even prior to chemotherapy. CICI mitigation research should thus focus on CS most vulnerable to CICI (e.g., CS with T2D).

Aerobic PA and resistance training (RT) have robust health benefits counteracting much of the pathophysiology underlying CICI and T2D. Reviews suggest better cerebrovascular function in those who are more active and/or fitter relative to those less active and/or fit, with greater fitness positively associated with cognitive function in other at-risk populations. In those with T2D, research has shown that PA is impactful at lowering pro-inflammatory cytokines and improving insulin sensitivity. Yet, research is needed on how increasing PA in CS with T2D reporting CICI improves cerebrovascular and cognitive health through improved fitness.

We are thus conducting a 30-participant quasi-experimental pilot study in CS+T2D (n=15; cases) and CS (n=15; controls)-all self-reporting CICI. We will first investigate cerebrovascular, cognitive, pro-inflammatory, cardiometabolic, and epigenetic (exploratory) differences between CS+T2D and CS given that no known investigations have directly compared these outcomes concurrently between these groups (Aim 1). We will then examine differential between-group changes in these outcomes and select psychosocial metrics during a 12-week technology-delivered PA program grounded in the Social Cognitive Theory-crucial to further investigate how to intervene and reverse the underlying pathophysiology (Aims 2 and 3). This collaboration between clinical scientists and translational researchers is critical to conducting this comprehensive project given our diverse skillsets and preliminary studies. This collaboration will serve our larger goal of acquiring extramural funding to investigate in even greater detail the most clinically-relevant pathophysiological mechanisms observed during this project. Our Aims/Hypotheses are (main outcomes underlined):

Aim 1: Characterize cerebrovascular function, cognitive function, pro-inflammatory cytokines, and cardiometabolic outcome differences between CS+T2D and CS. Our Hypotheses 1 are that CS+T2D will have a: poorer measures of middle cerebral artery velocity and cerebrovascular conductance, reactivity, and resistance. b: lower executive function scores. c: higher c-reactive protein, interleukin-6, and monocyte chemoattractant protein 1 concentrations. and d: higher blood pressure and insulin resistance measures.

研究设计

研究类型: Interventional
分配方式: Na
干预模型: Single Group
主要目的: Supportive Care
盲法: None

入排标准

年龄范围: 18 Years 至 —（Adult, Older Adult）
性别: All
接受健康志愿者: 否

入选标准

•≥18 years old
•ability to speak/read English
•ability to provide informed consent
•underwent treatment within the last three years for a non-central nervous system-related cancer with said treatment having included chemotherapy
•self-reported cognitive difficulties following cancer treatment
•For CS+T2D: current T2D diagnosis as classified by a fasted blood glucose of ≥126 mg/dL, 2-hour oral glucose tolerance test of ≥200 mg/dL, HbA1c level of ≥6.5%, or use of medications to treat hyperglycemia (e.g., Metformin) or For CS: no current T2D diagnosis as classified by a fasted blood glucose <100 mg/dL, 2-hour oral glucose tolerance test <140 mg/dL, or HbA1c level of <5.7%. Presence/absence of T2D to be confirmed preferentially via physician's documentation
•own smartphone and/or computer with internet access
•willing to participate in the 12-week remotely-delivered PA program

排除标准

•reporting a Physical Activity Readiness Questionnaire (2017 PAR-Q) score that indicates PA may potentially be unsafe, unless the participant produces a signed doctor's note. We will define 2017 PAR-Q+ scores as indicating that PA may potentially be unsafe as responding "Yes" to any of the follow-up questions except [1] if the individual indicates that they have high blood pressure but subsequent responses indicate that they do not have problems keeping it under control and that their resting blood pressure is less than 160/90 mmHg, and [2] if the individual indicates that they have a metabolic condition but subsequent responses indicate that they do not have problems controlling their blood sugar levels, do not any experience signs or symptoms of hypoglycemia, and do not have any signs of symptoms of listed diabetes complications)
•engaging in ≥75 min/week of vigorous-intensity PA, ≥150 min/week of moderate-intensity PA, or an equivalent combination of both over the last 3 months
•currently a prisoner, pregnant, or planning to become pregnant during study.

研究组 & 干预措施

Social Cognitive Theory-based, Technology-delivered Physical Activity Program

Experimental

Participants will engage in a 12-week program of aerobic and muscle-strengthening physical activity. This program will be delivered remotely via two smartphone applications--one for providing health education, goal setting, and journaling features and the other for delivery of the physical activity program in a highly-personalized and HIPAA-compliant manner. Participants will receive a Fitbit to track their activity and resistance bands to use during their resistance training physical activity. All program components will be based in the Social Cognitive Theory and will target improving participants' physiological and psychological health outcomes.

干预措施: Social Cognitive Theory-based, Technology-delivered Physical Activity Program (Behavioral)