Clinical Research Directory

Effects of BFR-training on Stem Cells and Immune Cells in Human Skeletal Muscle

In this 3-year project, investigators will first measure stem cells (primary outcome) and immune cells (secondary outcome) in human skeletal muscle immediately after and 24 hour after the BFR-training. In the second and third year, the effect of β-NMN (vitamin B3 precursor) and antioxidant on the same outcomes after BFR-exercise will be assessed. The BFR-exercise in the study will consist of a 5 × 10-second sprinting with maximal voluntary efforts, 5 minutes after a BFR pre-conditioning to legs using pressurized cuffs. In Study 1 (1st year, N = 24, aged 20-30 year), a randomized crossover trial will be conducted to compare the efficacy of sprinting exercise using BFR pre-conditioning at 20 mmHg (control) or 180 mmHg (occlusion). Study 2 (2nd year, N = 24, aged 20-30 years) will be conducted to examine the effect of β-NMN supplementation on the aforementioned outcomes in human muscles using a randomized placebo-controlled crossover study design. Study 3 (third year, N = 24, aged 20-30 years) will be conducted to examine the effect of vitamin C on the same variables immediately after and 24 hours after resistance exercise intervention, using a randomized placebo-controlled crossover study design.

Assessing Health System Readiness for Scaling Antenatal MMS in Cambodia

Malnutrition among pregnant women in low- and middle-income countries (LMICs) can cause micronutrient deficiencies that result in adverse maternal and neonatal health outcomes. The World Health Organization has recently recommended antenatal multiple micronutrient supplementation (MMS) that includes iron and folic acid (IFA) to improve maternal and neonatal health outcomes. MMS likely provides additional antenatal benefits over IFA supplementation alone. The Cambodian government, in partnership with Helen Keller International, is piloting MMS implementation in Takeo Province, which will inform nationwide scale-up of MMS. Study Purpose: The Takeo implementation must be evaluated to understand context-specific implementation of MMS and health system readiness for scale-up. This study assesses system readiness through four domains from the Intervention Scalability Assessment Tool (ISAT): (1) fidelity and adaptation, (2) reach and acceptability, (3) delivery setting and workforce capacity, and (4) implementation infrastructure. Population: The pilot involves transitioning to MMS from IFA across all 86 health centers, all 6 referral hospitals, and the provincial hospital in Takeo province. This study includes pregnant women receiving antenatal care, antenatal healthcare providers and facilities, and hospital managers in Takeo. The study also includes national governing bodies for MMS delivery. Methods: This mixed-methods study uses ISAT as a framework for developing data collection methods. Sampling strategies emphasize urban and rural representation across all operational districts in Takeo and diverse stakeholder perspectives at multiple levels of the health system. Data collection includes: * 12 focus group discussions (FGDs) with health center providers to assess provider adherence to MMS delivery guidelines, perspectives on the transition to MMS, and additional resources needed for MMS delivery * Workload assessment surveys at FGDs to quantify any burden on providers and resource gaps to deliver MMS * MMS stockout monitoring at 18 health centers and 7 hospitals to assess supply chain reliability * 15 key informant interviews with hospital managers to assess perspectives on the integration of MMS into antenatal services and facility readiness for MMS delivery * Phone surveys with 630 pregnant women to assess acceptability and adherence to MMS at 90- and 180-days after MMS distribution * One FGD with national-level stakeholders to assess national-level readiness, economic planning, and resource planning for sustainable MMS implementation and scale-up * Rapid economic evaluation to estimate the cost of nationwide scale-up Potential Impact: This study will generate insights into real-world implementation of MMS in Cambodia. It will identify context-specific adaptations, implementation gaps, and resource planning frameworks needed for nationwide scale-up of MMS. Successful scale-up is anticipated to improve maternal and neonatal health in Cambodia. Findings can also be used to guide other LMICs seeking to transition to and sustainably implement MMS.

Exploring Sustainable Alternatives to Marine Oils With Echium and Ahiflower Oils

This randomized, single-blind, crossover clinical trial aims to evaluate Echium oil and Ahiflower® oil as sustainable, plant-based alternatives to marine oils for omega-3 supplementation. Although fish oil is the primary dietary source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), its use as a dietary supplementation presents several drawbacks, including high cost, potential contamination, limited global supply, and sustainability concerns. Echium and Ahiflower oils are naturally rich in stearidonic acid (SDA), a metabolic intermediate that bypasses the rate-limiting Δ6-desaturase step in the omega-3 pathway, potentially enhancing the conversion to EPA. Fifteen participants will undergo three 8-week intervention phases-Echium oil (15 g/day), Ahiflower oil (15 g/day), or EPA capsules (2.34 g/day)-separated by four-week washout periods. Blood samples will be collected before and after each phase to measure fatty acid profiles in plasma, plasma fractions, and erythrocytes using GC-MS. Anthropometric and biochemical parameters will also be assessed. The study seeks to determine whether SDA-rich plant oils can effectively increase EPA levels in humans and potentially reduce the reliance on marine oils for cardiovascular health benefits.