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Currently, you can access the following clinical trials being conducted worldwide:
Clinicaltrials.gov identifier NCT03937908
Recruitment Status Recruiting
First Posted May 6, 2019
Last update posted September 17, 2020
This study will measure the oral bioavailability and pharmacokinetics of known bioactive compounds from a standardized Centella asiatica water extract product (CAP) in mildly demented elders on cholinesterase inhibitor therapy. Compound levels will be measured in human plasma and urine over 12 hours after acute oral administration of two doses of the botanical extract product. The dose giving maximum plasma levels (Cmax)closest to those observed in the investigator's mouse studies, the area under the curve (AUC0-12), as well as the rate of clearance (t ½) of the known compounds and time of maximum concentration (tmax), will be identified. These data will be used to inform decisions on the dosage and dosing frequency for future clinical trials.
PRIMARY OBJECTIVES: 1. To assess the bioavailability and rate of clearance of Centella asiatica derived compounds in mildly demented elders on cholinesterase inhibitor therapy through a pharmacokinetic study. 2. To determine the acute tolerability of a Centella asiatica product in mildly demented elders on cholinesterase inhibitor therapy. OUTLINE: Participants will orally consume a single administration of a standardized Centella asiatica water extract product (CAP). Two doses (2g and 4g CAW) will be administered on separate occasions, at least two weeks apart. The levels of known bioactive compounds present in Centella asiatica will be measured in human plasma and urine over 12 hours after administration of each of the doses.
|Experimental: 2g CAP
Single administration of 2g of Centella asiatica water extract standardized product dissolved in 10-12 ounce of water and consumed by mouth once on an empty stomach.
Drug: 2g Centella asiatica water extract product
2g of Centella asiatica water extract (CAW) in a standardized product containing excipients to improve palatability, color matching and dispersability. The product (CAP) is a powder which will be dissolved in 10-12 ounce of water and consumed by mouth once on an empty stomach.
|Experimental: 4g CAP
Single administration of 4g of Centella asiatica water extract standardized product dissolved in 10-12 ounce of water and consumed by mouth once on an empty stomach.
Drug: 4g Centella asiatica water extract product
4g of Centella asiatica water extract (CAW) in a standardized product containing excipients to improve palatability, color matching and dispersability. The product (CAP) is a powder which will be dissolved in 10-12 ounce of water and consumed by mouth once on an empty stomach.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, , Learn About Clinical Studies.-->
1. Age 65-85, male and female
2. Meet the National Institute of Aging - Alzheimer's Association core clinical criteria
for mild cognitive impairment or probable Alzheimer's disease dementia with a Clinical
Dementia Rating (CDR) score of 0.5-1 and MMSE score of 20-28
3. Report a history of subjective memory decline with gradual onset and slow progression
over the last one year before screening; MUST be corroborated by an informant
4. On cholinesterase inhibitor therapy for Alzheimer's disease (AD) and must be on a
stable dose for at least 12 weeks prior to baseline
5. Caregiver/study partner that can accompany participant to all study visits
6. Sufficient English language skills to complete all tests
7. Sufficient vision and hearing to complete all tests
8. No known allergies to Centella asiatica or CAP excipients
9. Willingness to discontinue all botanical dietary supplements for one week prior to and
during each study visit
10. Willingness to comply with a 48-hour low plant diet for each study visit
11. Absence of significant depression symptoms (Geriatric Depression Scale-15 score of
<12) 12. Body Mass Index (BMI) greater than 17 and less than 35 at screening 13. General health status that will not interfere with the ability to complete the study Exclusion Criteria: 1. Current smoking, alcohol or substance abuse according to DSM-V criteria 2. Women who are pregnant, planning to become pregnant or breastfeeding 3. Men who are actively trying to conceive a child or planning to within three months of study completion 4. Severe aversion to venipuncture 5. Abnormal laboratory evaluation indicating asymptomatic and untreated urinary tract infection 6. Cancer within the last five years, with the exception of localized prostate cancer (Gleason Grade <3) and non-metastatic skin cancers 7. Comorbid conditions such as diabetes mellitus, kidney failure, liver failure, hepatitis, blood disorders, clinical symptomatic orthostatic hypotension, and unstable or significantly symptomatic cardiovascular disease 8. Significant disease of the central nervous system such as brain tumor, seizure disorder, subdural hematoma, cranial arteritis, or clinically significant stroke 9. Major depression, schizophrenia, or other major psychiatric disorder defined by DSM-V criteria 10. Medications: sedatives (except those used occasionally for sleep), central nervous system active medications that have not been stable for two months (including beta blockers, cimetidine, SSRIs, SNRIs), anticoagulants (i.e. Warfarin), investigational drugs used within five half-lives of baseline visit, systemic corticosteroids, neuroleptics, anti-Parkinsonian agents, narcotic analgesics, nicotine (tobacco, patches, gum, lozenges, etc.), Cannabis sativa (herb or edibles) 11. Non-Alzheimer dementia such as vascular dementia, normal pressure hydrocephalus or Parkinson's disease 12. Mini Mental State Examination (MMSE) score of 28 or CDR score >1 or zero
13. Unwilling to maintain stable dosage of AD medications throughout study duration
14. Inability or unwillingness of individual or legal guardian/representative to give
written informed consent.
15. Current drug or alcohol use or dependence that, in the opinion of the site
investigator, would interfere with adherence to study requirements.
Contact: Amala Soumyanath, PhD 503-494-6878 email@example.com
United States, Oregon
Oregon Health and Science University Department of Neurology
Oregon Health and Science University
National Center for Complementary and Integrative Health (NCCIH)
Principal Investigator: Amala Soumyanath, PhD OHSU Department of Neurology