The Role of Gut Microbiota in Hypertension

Completed

Conditions studied: Hypertension

In brief

Hypertension is the single most prevalent risk factor for heart diseases, heart failure, kidney failure and stroke. About 1 in 3 adults in the United States have hypertension. Approximately 28-30% of hypertensive patients suffer from resistant hypertension (RH). Inflammation has been implicated in the pathogenesis of the hypertension. Additional data suggests the involvement of gut microbiota in host normal cardiovascular functions and pathophysiology. Accumulating evidence demonstrates that antibiotic treatment benefits patients with acute coronary syndromes and reduces the incidence of ischemic cardiovascular events. Even though these studies did not address effects of antibiotic treatment on the gut microbiota, it is possible that gut microbiota could affect neurologic inflammation. Finally, intestinal microbiota has recently been proposed to modulate blood pressure (BP) through production of short-chain fatty acids. In order to investigate this, the investigators hypothesize that gut microbiota is involved in the neuroinflammation-mediated initiation and establishment of RH, and targeting gut microbiota by minocycline would produce beneficial outcomes in RH.

Key facts

Study ID

NCT02188381

Run by

University of Florida

People needed

292

Starts

2014-07-01

Expected to finish

2020-08-01

Last updated by the study team

2025-08-17

Who can join

Age: 18 and older, up to 80. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• age >18 and <80
• is competent and willing to provide consent
• Inclusion criteria for each subject group:
• Control subjects will have a systolic BP <140mmHg with no cardiovascular disease
• Patients with controlled hypertension
• Patients with uncontrolled hypertension
• Resistant hypertension subjects will have systolic blood pressure (BP) ≥140 mmHg despite ≥3 anti-hypertensive medications of different classes one of which should be a diuretic
• Patients who are no longer RH subjects and have normal blood pressure
• Subjects participating in NCT 02133872 will be eligible to participate

You may not qualify if…

• currently pregnant or have been pregnant in the last 6 months;
• antibiotic treatment within 2 months of study enrollment;
• currently taking a medication (e.g., antibiotic, anti-inflammatory agents, glucocorticoids or other immune modulating medications);
• unwilling to discontinue vitamin or supplements, including probiotics, potentially affecting gut microbiota (vitamins/supplements and medications that possibly affect the gut microbiota should be discontinued for at least 2wks prior to stool collection);
• history of intestinal surgery, inflammatory bowel disease, celiac disease, lactose intolerance, chronic pancreatitis or other malabsorption disorder.

Where it is running

• Cardiovascular Clinic at UF Health — Gainesville, Florida, United States

Full record on ClinicalTrials.gov

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