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CompletedNCT00520910Updated Jun 18, 2019Results posted

Efficacy of Polypodium Leucotomos Extract Decreasing UVA Premutagenic and Photoaging Markers

A Phase 2 interventional study of Polypodium leucotomos in Aging and Skin Abnormalities, sponsored by University of Miami. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-06-18.

Sponsored by University of Miami · Phase 2, Interventional, and Basic science

Phase
Phase 2
Study type
Interventional
Enrollment
10
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

With this study, the investigators will like to determine if taking a dose of the study medication, called Polypodium leucotomos (PL), prevents some of the changes in the skin caused by the adverse effects of UVA, a type of ultraviolet light.

02

Conditions studied

  • Aging
  • Skin Abnormalities

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Keywords

  • Polypodium leucotomos, Ultraviolet Rays, Heliocare, calaguala, anapsos
  • Skin Aging and Damage
03

In context

Skin Abnormalities

39 studies on the registry are indexed under Skin Abnormalities; 7 are open to participants now.

This study's enrollment of 10 is below the median of 39 across 26 interventional studies indexed under Skin Abnormalities.

Browse Skin Abnormalities studies →

Lead sponsor

University of Miami is the lead sponsor of 840 studies on the registry; 164 are open to participants now.

Of its 115 completed or terminated interventional studies of FDA-regulated products, 97 (84%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Healthy subjects,
  • 18 years of age or older,
  • with Fitzpatrick skin types II and III.

Exclusion criteria

Exclusion Criteria:

  • Pregnancy
  • Personal history of skin cancer
  • History of abnormal photosensitivity
  • Smokers
  • Patients with history or being exposed to other forms of radiation (other than sunlight)
  • History or current exposure to asbestos
  • Patients taking any drug that might alter the response of skin to UVR (including, but are not limited to, doxycycline, sulfas, psoralens, and amiodarone)
  • Patients unable to undergo skin
  • History of abnormal scarring
  • History of adverse reaction to local anesthesia
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

05

Study design

Phase
Phase 2
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Investigator)
Enrollment
10 participants (actual)

Study arms

  • Experimental
    Polypodium leucotomos extract

    Subject is given a 7.5 mg/kg dose of Polypodium leucotomos.

    Drug: Polypodium leucotomos

  • No intervention
    No intervention

    Subject is not given any treatment.

Interventions

  • Subject is given a 7.5 mg/kg oral dose of Polypodium leucotomos during Baseline visit, and again at 8 hours and 2 hours before the Follow-up visit #2.

    Also known as: Heliocare

06

What researchers measure

Primary outcomes

  1. Change in Common Deletion (CD) Value in DNA of Skin Biopsy Sample

    CD is determined by semiquantitative real-time polymerase chain reaction.

    Time frame: baseline, 24 hours

  2. 8-oxo-7,8-dihydro-2'-Deoxyguanosine (8-oxo-dG) Quantification in Skin Biopsy Sample Taken From Final Visit

    Time frame: 24 hours

07

Results

Posted Jun 18, 2019

Participant flow

Participant flow — Overall Study
MilestonePolypodium Leucotomos ExtractNo Intervention
Started55
Completed55
Not completed00

Outcome measures

PrimaryChange in Common Deletion (CD) Value in DNA of Skin Biopsy Sample

CD is determined by semiquantitative real-time polymerase chain reaction.

Time frame:
baseline, 24 hours
Reported as:
Mean · percent change
Change in Common Deletion (CD) Value in DNA of Skin Biopsy Sample
percent changePolypodium Leucotomos ExtractNo Intervention
Change in Common Deletion (CD) Value in DNA of Skin Biopsy Sample-84 ± NA217 ± NA
Primary8-oxo-7,8-dihydro-2'-Deoxyguanosine (8-oxo-dG) Quantification in Skin Biopsy Sample Taken From Final Visit
Time frame:
24 hours

No measurements were reported for this outcome.

Adverse events

Collected over 24 hours. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Polypodium Leucotomos Extract0/5 (0%)0/5 (0%)0/5 (0%)
No Intervention0/5 (0%)0/5 (0%)0/5 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Polypodium Leucotomos ExtractNo InterventionTotal
<=18 years000
Between 18 and 65 years5510
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)Polypodium Leucotomos ExtractNo InterventionTotal
Female——0
Male——0
08

Study locations

1 site
  • University of Miami Skin Research Group Office
    Miami, Florida 33136, United States
09

References and documents

Publications

  • Philips N, Smith J, Keller T, Gonzalez S. Predominant effects of Polypodium leucotomos on membrane integrity, lipid peroxidation, and expression of elastin and matrixmetalloproteinase-1 in ultraviolet radiation exposed fibroblasts, and keratinocytes. J Dermatol Sci. 2003 Jun;32(1):1-9. doi: 10.1016/s0923-1811(03)00042-2. PubMed 12788523 ↗
  • Gombau L, Garcia F, Lahoz A, Fabre M, Roda-Navarro P, Majano P, Alonso-Lebrero JL, Pivel JP, Castell JV, Gomez-Lechon MJ, Gonzalez S. Polypodium leucotomos extract: antioxidant activity and disposition. Toxicol In Vitro. 2006 Jun;20(4):464-71. doi: 10.1016/j.tiv.2005.09.008. Epub 2005 Nov 2. PubMed 16263237 ↗
  • Alonso-Lebrero JL, Dominguez-Jimenez C, Tejedor R, Brieva A, Pivel JP. Photoprotective properties of a hydrophilic extract of the fern Polypodium leucotomos on human skin cells. J Photochem Photobiol B. 2003 Apr;70(1):31-7. doi: 10.1016/s1011-1344(03)00051-4. PubMed 12745244 ↗
  • Middelkamp-Hup MA, Pathak MA, Parrado C, Garcia-Caballero T, Rius-Diaz F, Fitzpatrick TB, Gonzalez S. Orally administered Polypodium leucotomos extract decreases psoralen-UVA-induced phototoxicity, pigmentation, and damage of human skin. J Am Acad Dermatol. 2004 Jan;50(1):41-9. doi: 10.1016/s0190-9622(03)02732-4. PubMed 14699363 ↗
  • Middelkamp-Hup MA, Pathak MA, Parrado C, Goukassian D, Rius-Diaz F, Mihm MC, Fitzpatrick TB, Gonzalez S. Oral Polypodium leucotomos extract decreases ultraviolet-induced damage of human skin. J Am Acad Dermatol. 2004 Dec;51(6):910-8. doi: 10.1016/j.jaad.2004.06.027. PubMed 15583582 ↗
  • Agar NS, Halliday GM, Barnetson RS, Ananthaswamy HN, Wheeler M, Jones AM. The basal layer in human squamous tumors harbors more UVA than UVB fingerprint mutations: a role for UVA in human skin carcinogenesis. Proc Natl Acad Sci U S A. 2004 Apr 6;101(14):4954-9. doi: 10.1073/pnas.0401141101. Epub 2004 Mar 23. PubMed 15041750 ↗
  • Berneburg M, Gattermann N, Stege H, Grewe M, Vogelsang K, Ruzicka T, Krutmann J. Chronically ultraviolet-exposed human skin shows a higher mutation frequency of mitochondrial DNA as compared to unexposed skin and the hematopoietic system. Photochem Photobiol. 1997 Aug;66(2):271-5. doi: 10.1111/j.1751-1097.1997.tb08654.x. PubMed 9277148 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 18, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00520910
Responsible party
Robert S. Kirsner (Professor, University of Miami) — Principal investigator
First posted
Aug 27, 2007
Start date
Aug 2007
Primary completion
May 2009
Completion
May 2009
Results posted
Jun 18, 2019
Last update
Jun 18, 2019

Study contacts

Brian Berman, M.D., Ph.D.
principal investigator · University of Miami, Department of Dermatology and Cutaneous Surgery

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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