PD Study to Assess Phosphate Binding Characteristics of K2CG Chewing Gum

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

36 participants

Study Classification

INTERVENTIONAL

Study Start Date

2011-07-31

Study Completion Date

2011-08-31

Brief Summary

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The specific purpose of this study is to describe the characteristics of the K2CG chewing gum, specifically as it relates to duration of gum chewing (exposure), timing of gum chewing in relation to a meal, and dose of K2CG chewing gum.

Detailed Description

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Previous studies have demonstrated that salivary phosphate levels are elevated in patients with CKD and that there is a direct and linear correlation between serum phosphorus and salivary phosphorus. K2CG chewing gum may provide an alternative approach to treating patients with elevated phosphate levels. However, data regarding the pharmacodynamic effect of the K2CG chewing gum on salivary phosphorus is lacking; as such, this study seeks to examine the phosphate binding characteristics of K2CG chewing gum with 2 different amounts of chitosan and varying exposure time in the fasting and fed condition.

A precise knowledge of the pharmacodynamic effect of the K2CG chewing gum on salivary phosphorus is expected to provide information necessary to plan and conduct a subsequent interventional trial with K2CG chewing gum in patients with both Chronic Kidney Disease and ESRD. Specifically, quantification of the amount of salivary phosphorus that binds to 3 formulations of chitosan loaded chewing gum (20 mg, 40 mg and 60 mg) with varying exposure times will inform the optimal duration of exposure relative to gum size. The effect of gum size will be further explored via the use of two different sizes of placebo chewing gum (1.7 g and 2.0 g sizes). Additionally it is a specific aim of this study to assess whether chewing gum in the fasted vs. fed state affects the binding characteristics of chitosan loaded chewing gum.

This study is a pharmacodynamic study to characterize the phosphate binding capabilities of three different doses of K2CG chewing gum (20mg, 40mg, 60mg) and one placebo chewing gum (1.7 g). Thirty-six subjects will be enrolled across three renal function group based on estimated glomerular filtration rate.

Study assessments will occur over four study visit days (Visit 2, Visit 3, Visit 4, and Visit 5). Fasting study procedures will occur in the morning of each visit day, and non-fasting procedures will occur following the administration of a standardized meal on the same day. All subjects will receive three doses of K2CG chewing gum and one placebo: 20 mg dose at Visit 2, 1.7 g placebo at Visit 3, 40 mg dose at Visit 4, and 60 mg dose at Visit 5. Subjects will not be aware of the specific gum dose or size at any study visit (single blind). The duration of gum chewing and timing of salivary collections will vary within each group.

Saliva will be collected at specified time points throughout the trial. Fasting salivary phosphorus must be collected with nothing to eat or drink for at least 2 hours.

Conditions

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Hyperphosphatemia Chronic Kidney Disease

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

Blinding Strategy

SINGLE

Participants

Fasting: Chew gum for 60 minutes Post meal: Being chewing gum 5 minutes post meal

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Men or women \> 18 years of age;
* Must have no dietary restriction that would preclude eating standardized meal (both a meat based and vegan option available)
* The subject has voluntarily signed and dated the most recent informed consent form approved by an Institutional Review Board (IRB).
* Must be able to chew gum for at least 60 minutes.
* Must have historical eGFR appropriate for the study.

Exclusion Criteria

* Receiving or has received an investigational product (or is currently using an investigational device) within 30 days prior to Visit 2;
* Evidence of active (clinically significant) infection at the time of study enrollment (in the opinion of the investigator);
* Dental work within 48 hours of enrollment (Visit 2); and
* Known sensitivity to chitin, or allergy to shellfish

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

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United States

References

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Block GA, Persky MS, Shamblin BM, Baltazar MF, Singh B, Sharma A, Pergola P, Smits G, Comelli MC. Effect of salivary phosphate-binding chewing gum on serum phosphate in chronic kidney disease. Nephron Clin Pract. 2013;123(1-2):93-101. doi: 10.1159/000351850. Epub 2013 Jun 22.

Reference Type DERIVED

PMID: 23797006 (View on PubMed)

Other Identifiers

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CMD 005

Identifier Type: -

Identifier Source: org_study_id

PD Study to Assess Phosphate Binding Characteristics of K2CG Chewing Gum

Study Results

Basic Information

Brief Summary

Detailed Description

Conditions

Study Design

Study Groups

Chewing Arm 1

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

Chewing Arm 2

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

Chewing Arm 3

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

Chewing Arm 4

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

Interventions

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

K2CG chewing gum

Eligibility Criteria

Inclusion Criteria

Exclusion Criteria

Sponsors

CM&D Pharma Limited

Denver Nephrologists, P.C.

Responsible Party

Principal Investigators

Geoffrey A Block, MD

Locations

Denver Nephrologists, PC

Countries

References

Block GA, Persky MS, Shamblin BM, Baltazar MF, Singh B, Sharma A, Pergola P, Smits G, Comelli MC. Effect of salivary phosphate-binding chewing gum on serum phosphate in chronic kidney disease. Nephron Clin Pract. 2013;123(1-2):93-101. doi: 10.1159/000351850. Epub 2013 Jun 22.

Other Identifiers

CMD 005