Clinical trial NCT03066921: Evaluation Of The Efficacy of a Strain-Specific Probiotic Formulation in Hemodialysis Patients
Official title: Evaluation of the Effects of a Probiotic Formulation in Hemodialysis Patients
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: End Stage Renal Disease
Keywords: Lactic acid bacteria
dyslipidemia uremic toxins
Hemodialysis
Lead sponsor: Tungs' Taichung Metroharbour Hospital
Sponsor class: OTHER
First posted: 2017-03-01
Enrollment: 52
Sex: ALL
Minimum age (years): 20
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Randomized placebo controlled trial
Primary purpose: TREATMENT

Brief summary: Previous studies found that lactic acid bacteria could inhibit the activity of the performance of aristolochic acids (AAs) and improve apoptosis of proximal tubular epithelial cells (NRK-52E) and renal fibrosis on rats. The aim of this study is to assessment a novel health food of lactic acid bacteria for preventing renal dysfunction and replacing or assisting conventional drug treatment. This study in 300 hemodialysis patients with dialysis quality assessment index (KT/V, urea reduction ratio (URR), albumin, prealbumin, Hb, CRP...) screened for more than three months, and the stability of the situation in dialysis patients. They will be divided into two groups in order to conduct ergonomic assessments. One group maintains their original diet and medicine. The other group will take the novel lactic acid bacteria and placebo (1x1011 cfu/3±0.2 g/bag) in every morning and evening after their meals. The effect of 0, 6, 12, 18, 24 weeks of the novel lactic acid bacteria will be assessed after starvation for 4 weeks. Group C was the control group did not give any test samples, but continued to observe. The overall goal of the aforementioned study is to develop a novel food product of lactic acid bacteria which can improve dialysis quality for hemodialysis patients. The investigators hope that this novel product can get a patent and be commercialized.

Detailed description: Background:

Insulin resistance (IR) and its associated metabolic disorders are common features of chronic kidney disease (CKD)and accumulating evidence suggested they are important contributors for the cardiovascular burden of CKD patients. In recent years, the modification of the intestinal ﬂora and activation of inflammation pathways have been implicated in the pathogenesis of IR in patients suffering from metabolic syndrome. These important discoveries have led to major advances in understanding the mechanisms of uraemia-induced IR. Furthermore, recent studies show impairment of the intestinal barrier and renal function function as well as changes in the composition of the gut microbiome can contribute to the prevailing inflammation, and gut-derived uremic toxins. Some of these uraemic toxins have been linked to the pathogenesis of IR.

Probiotics is one of the functional foods believed to mediate their health promoting activities through modulating the composition of the gut health. Ingestion of probiotics has been shown not only to influence gut microbiota composition but also the secretion of the gut hormones that ameliorate insulin resistance in animal models. Limited trials in human also showed that supplementation with probiotic not only affect glucose homeostasis, but improved other diabetes related comorbidities such as metabolic syndrome, hypertension, and hyperlipidemia. It also increasing clear that many of the multifactorial physiological functions of gut bacteria are highly strain specific, preselection of appropriate probiotic strains based on their expression of functional biomarkers is critical

Objectives and hypotheses:

To address this research gap, this randomized controlled trial is proposed to determine the efficacy of probiotic formulation to improve metabolic profile and reduction of uremic toxins through modulating gut microbiota composition and gut immune function in hemodialysis patients.The investigators hypothesized that the probiotic supplementations will improve blood glucose control as well as other related metabolic aberrations and lower the levels of gut-derived uremic toxins.

Methodology:

This is a single center, double blind randomized parallel group control trial with 6 months probiotic formulation with strain specific lactobacillus or placebo. After screening the eligible subjects will be selected. Then, after consent taking and 4 weeks of washout period, participants will be randomly assigned to either receive probiotic formulation or placebo for 6 months. Measurements of blood parameters including glycemic control related parameters, lipid profile, nutritional markers, inflammatory markers and uremic toxins. Nutritional assessments, quality of life assessment and anthropometry measurements will take place at baseline, and after 24 months.

Eligibility criteria: Inclusion Criteria:

1. Both sexes aged between 20-75 years.
2. Received stable hemodialysis at least 3 months.
3. Written informed consent.

Exclusion Criteria:

1. patients with severe infections, severe heart disease and liver disease, malignancy, autoimmune disorders, severe malnutrition, or clinical conditions requiring oral nutrition supplements;
2. Inability to follow protocol.
3. patients with known gastro-intestinal disease (i.e.,inflammatory bowel disease,crohn's disease,ulcerative colitis)
4. Use of antibiotics, prebiotics or probiotics and immunosuppression medications in the past 4 weeks
5. Pregnancy or wishing/trying to get pregnant

Primary outcomes:
measure: Change from Baseline Triglyceride/HDL cholesterol ratio at 3 months, 6 months and 3 months after the trial
timeFrame: baseline,3 months, 6 months and 3 months after the trial
Secondary outcomes:
measure: Plasma concentrations of typical gut-derived uremic toxins(Indoxyl sulfate and p-cresyl sulfate)
timeFrame: baseline,3 months, 6 months and 3 months after the trial
measure: plasma concentrations of inflammatory biomarkers
timeFrame: baseline,3 months, 6 months and 3 months after the trial
measure: plasma concentrations of microbial translocation biomarkers
timeFrame: baseline,3 months, 6 months and 3 months after the trial
measure: Quality of life
timeFrame: baseline and 6 months
measure: Nutritional Status
timeFrame: baseline and 6 months
measure: Gut function questionnaire as a measure of tolerability
timeFrame: Symptoms during first month
Other outcomes:
Locations:
city: Taichung
country: Taiwan
facility: Tungs' Taichung MetroHarbour Hospital
Study officials:
affiliation: Tungs' Taichung Metroharbour Hospital
name: Paik Seong Lim, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Lim PS, Wang HF, Lee MC, Chiu LS, Wu MY, Chang WC, Wu TK. The Efficacy of Lactobacillus-Containing Probiotic Supplementation in Hemodialysis Patients: A Randomized, Double-Blind, Placebo-Controlled Trial. J Ren Nutr. 2021 Mar;31(2):189-198. doi: 10.1053/j.jrn.2020.07.002. Epub 2020 Sep 6.