Dietary Intervention to Improve Kidney Transplant Outcomes

Randomized controlled trial of a curriculum intervention teaching patients to eat a whole-food plant-based dietary pattern versus standard of care in kidney transplant recipients within the first few months of transplant

Study Overview

• Status: Active, not recruiting
• Conditions: Kidney Diseases; Hypertension; Obesity; Diabetes; Diet, Healthy; Kidney Transplant; Complications; Lifestyle, Healthy; Transplant;Failure,Kidney
• Intervention / Treatment: Behavioral: Dietary Education Curriculum

Detailed Description

A whole-food plant-based dietary pattern has emerged as fundamental in preventing and treating many of the lifestyle-related diseases of Western medicine, including cardiovascular disease, diabetes, hyperlipidemia, obesity, hypertension, chronic kidney disease and certain cancers. These diseases often occur or recur in the post-transplant population, leading to patient and graft loss. However, dietary education for kidney transplant recipients is not standardized and many patients remain ignorant about optimum healthy dietary practices. These patients are further challenged by the common occurrence of electrolyte derangements that require dietary restrictions. We propose a randomized controlled trial of a dietary intervention that focuses on whole-food plant-based eating in the kidney transplant population, testing this dietary pattern's impact on recipient health outcomes. This study addresses the critical need for cost-effective and safe strategies to improve health outcomes in transplant recipients and preserve kidney graft function. We have assembled an interdisciplinary team with expertise in transplant nephrology, lifestyle medicine, plant-based renal nutrition, health coaching and biostatistics to investigate the following aims: (1) to test the efficacy of a whole-food plant-based diet on improving kidney recipient cardiovascular and metabolic health and kidney allograft function, (2) to test the effect of a whole-food plant-based diet on kidney recipient post-transplant complication rates, and (3) to test the feasibility of a dietary education program on kidney transplant recipients' ability to adhere to a whole-food plant-based diet, all within a 12-month randomized controlled trial of plant-based diet versus usual care. Dietary counseling will focus on eating a predominantly plant-based diet comprised of fruits, vegetables, whole grains and legumes, and low in animal products, fats and processed foods. Dietary counseling will occur in group-based sessions weekly for the first month, then biweekly for 5 months. Patients will be followed for 12 months. This study has the potential to establish dietary intervention as a way to prolong kidney graft survival and to improve overall health and survival in kidney transplant recipients. This study will also launch a cohort of patients whose dietary patterns can be followed and compared over time, providing groundwork for further research into the connections between diet and kidney-related outcomes.

• Study Type: Interventional
• Enrollment (Actual): 49
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • California
    • Sacramento, California, United States, 95817
      • UC Davis

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Kidney transplant recipient aged 18 or greater
• Post-transplant months 2-12
• eGFR >= 20 mL/min

• Have at least one of the following:

  1. Hypertension history (BP >= 150/90 or on BP medications)
  2. Hyperglycemia history (FBG >= 100 x 2 or on diabetes medications)
  3. Overweight (BMI >= 25)

Exclusion Criteria:

• Rejection episode before study enrollment
• Gastrointestinal feeding tube or requires alternative nutrition
• Unable to understand or read English
• Unable to attend online classes or complete study questionnaires independently
• Already eating a plant-based diet
• Unwilling to make dietary changes
• Pregnant or breastfeeding
• Unable to consent
• Blindness
• Prisoners

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Intervention	Behavioral: Dietary Education Curriculum; Curriculum of dietary education and group-based counseling to encourage whole-food plant-based eating
No Intervention: Control

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Cardiometabolic health measures	Proportion of individuals achieving normotension, normoglycemia and weight reduction	1 year
Post-transplant complications rates	Composite incidence of emergency medical visits, hospitalizations and infections	1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Dietary complications	Incidence of diarrhea, use of electrolyte correcting medications, severity of hyper- and hypoglycemic events	1 year

Collaborators and Investigators

• Sponsor: University of California, Davis
• Collaborators: Academy of Nutrition and Dietetics

Study record dates

Study Major Dates

• Study Start (Actual): June 27, 2022
• Primary Completion (Estimated): July 1, 2028
• Study Completion (Estimated): July 1, 2028

Study Registration Dates

• First Submitted: July 5, 2022
• First Submitted That Met QC Criteria: July 5, 2022
• First Posted (Actual): July 8, 2022

Study Record Updates

• Last Update Posted (Actual): April 8, 2026
• Last Update Submitted That Met QC Criteria: April 2, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Keywords: diet
• Additional Relevant MeSH Terms: Urogenital Diseases; Endocrine System Diseases; Vascular Diseases; Cardiovascular Diseases; Nutrition Disorders; Male Urogenital Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Metabolic Diseases; Overnutrition; Body Weight; Glucose Metabolism Disorders; Overweight; Pathological Conditions, Signs and Symptoms; Nutritional and Metabolic Diseases; Signs and Symptoms; Obesity; Hypertension; Diabetes Mellitus; Kidney Diseases
• Other Study ID Numbers: 1771192

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No