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アトピー性皮膚炎に対する治療効果

健康なボランティアとアトピー性皮膚炎患者のマイクロバイオームに対する治療の効果

Background:

- Atopic dermatitis, or eczema, is a chronic skin disorder. Patients sometimes have infections with S. aureus bacteria. Researchers want to study how eczema treatments affect the number and the type of bacteria on the skin.

Objectives:

- To study the effect of eczema treatments on skin bacteria.

Eligibility:

  • Individuals between 2 and 25 years of age who have moderate to severe atopic dermatitis.
  • Healthy volunteers between 18 and 40 years of age with no history of eczema.

Design:

  • Participants will be screened with a physical exam and medical history. Research samples will be collected. Skin biopsies may also be performed.
  • All participants will be assigned to one of several study groups.
  • Healthy volunteers must not have taken antibiotics in the year before the start of the study.
  • All participants will have regular study visits during their 1-year participation. More research samples will be collected at these visits.
  • Healthy volunteers may be asked to come in for a one-time follow up after the 1 year mark.

調査の概要

詳細な説明

BACKGROUND:

  • The use of antibiotics has revolutionized medicine, yet the impact of antimicrobials on the human microbiome is incompletely understood.
  • Antimicrobial treatments, including topical and systemic antibiotics, are highly effective and are frequently used to manage disease flares of atopic dermatitis (AD). Concomitant use of dilute bleach baths reduces the clinical severity of AD in patients with clinical signs of bacterial skin infections.
  • The longitudinal impact of various antimicrobials on the human microbiome, particularly in skin, has not been systematically investigated.
  • Our recent study demonstrated that antibiotic-resistant bacteria can be observed after antibiotic exposure; however, multi-year persistence has not been evaluated

OBJECTIVES:

Primary:

- To characterize microbiome alterations in healthy adult volunteers and patients with AD after antimicrobial treatments.

ELIGIBILITY:

  • All subjects must be co-enrolled in NIH protocol 08-HG-0059
  • (Cohorts 1 [NO FURTHER ACCRUAL], 2 [INACTIVE], 4 [NO FURTHER ACCRUAL], 5 [INACTIVE]) Healthy volunteers aged 18 to 50 years with no history of AD.
  • (Cohort 1 [NO FURTHER ACCRUAL], 2 [INACTIVE], 4 [NO FURTHER ACCRUAL] and 5 [INACTIVE]) No prior use of systemic antibiotics in preceding 12 months.
  • (Cohort 3 [INACTIVE]) Subjects 2-50 years with atopic dermatitis with symptoms of active bacterial infection.
  • (Cohort 3 [INACTIVE]) Objective SCORAD (SCORing Atopic Dermatitis) score of >= 15 indicating moderate-to-severe disease.
  • (Cohort 6) Individuals previously enrolled in Cohorts 1 [NO FURTHER ACCRUAL] and 4 [NO FURTHER ACCRUAL].

DESIGN:

  • A prospective, interventional, longitudinal study examining changes in microbiome resulting from randomized, placebo-controlled, investigator-blinded antimicrobial treatments.
  • Subjects in Cohort 1 [NO FURTHER ACCRUAL] will be randomized to take one of 4 open label antibiotic regimens.
  • Subjects from Cohort 2 [INACTIVE] randomized to one of four possible blinded treatment combinations of study baths and antibiotics.
  • Subjects in Cohort 3 [INACTIVE] will be randomized to a cephalexin regimen with or without study baths.
  • Subjects in Cohorts 4 [NO FURTHER ACCRUAL] and 5 [INACTIVE] will receive one of two open label antibiotic regimens.
  • All subjects will undergo longitudinal microbiome sampling.
  • Subjects who completed on-protocol antibiotic regimen in Cohorts 1 [NO FURTHER ACCRUAL] and 4 [NO FURTHER ACCRUAL] may be recruited >1 year after completion of Cohorts 1 and 4 to undergo an optional single visit for microbiome sampling as Cohort 6.
  • AD patients [INACTIVE] will undergo clinical assessment to determine responses of skin infections to treatment.

研究の種類

介入

入学 (推定)

130

段階

  • フェーズ2

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

  • 名前:Heidi H Kong, M.D.
  • 電話番号:(301) 827-2460
  • メール:NIAMSderm@nih.gov

研究場所

    • Maryland
      • Bethesda、Maryland、アメリカ、20892
        • 募集
        • National Institutes of Health Clinical Center
        • コンタクト:
          • NIH Clinical Center Office of Patient Recruitment (OPR)
          • 電話番号:TTY dial 711 800-411-1222
          • メール:ccopr@nih.gov

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

2年~50年 (子、大人)

健康ボランティアの受け入れ

はい

受講資格のある性別

全て

説明

  • INCLUSION CRITERIA:

Cohorts 1 [NO FURTHER ACCRUAL], 2 [INACTIVE], 4 [NO FURTHER ACCRUAL] and 5 [INACTIVE]: Healthy Volunteers

  • Males and females aged 18-50 years at time of initial protocol sampling
  • Subjects must participate fully and be willing to comply with the procedures of the protocol
  • Subjects must be co-enrolled in NIH protocol 08-HG-0059
  • Ability of subject to understand and provide written informed consent
  • Access to bathing facilities (Cohort 2 [INACTIVE])
  • Ability to swallow capsules or tablets

Cohort 3 [INACTIVE]: Atopic Dermatitis Patients

  • Subjects must be aged 2-50 years
  • Subjects must be co-enrolled in NIH protocol 08-HG-0059
  • Subjects must have a diagnosis of atopic dermatitis on the basis of the criteria defined by UK Working Party s Diagnostic Criteria for Atopic Dermatitis
  • Subjects must have a primary care provider
  • Subjects must have an Objective SCORAD (SCORing Atopic Dermatitis) of greater than or equal to 15 indicating AD severity of moderate to severe
  • Prior to initiation of randomized treatment, subjects must have signs of bacterial skin infections (skin weeping, crusting, and/or pustules)
  • Access to bathing facilities
  • All subjects and/or their Legally Authorized Representative (LAR) must have the ability and agree to participate fully and comply with

the procedures of the protocol and provide informed consent. Pediatric patients will be included in age appropriate discussions and

age appropriate assent will be obtained in accordance with NIH guidelines.

-Ability of subject to understand and provide written informed consent

Cohort 6: Healthy Volunteers

  • Subjects previously enrolled in Cohorts 1 [NO FURTHER ACCRUAL] and 4 [INACTIVE] who completed on-protocol antibiotic regimen
  • Subjects must participate fully and be willing to comply with the procedures of the protocol
  • Ability of subject to understand and provide written informed consent

EXCLUSION CRITERIA:

Cohorts 1 [NO FURTHER ACCRUAL] and 2 [INACTIVE]: Healthy Volunteers

  • Does not meet inclusion criteria
  • Any female with symptoms and/or serum hormone levels consistent with perimenopause or menopause
  • Use of systemic antibiotics in 12 months preceding baseline sampling
  • Use of swimming pools, hot tubs, or whirlpools in 7 days preceding baseline sampling
  • Use of topical or oral complementary/alternative medicine (CAM) agents within 4 weeks of initiation of treatment
  • Known allergic reaction to sulfa, beta-lactam, or tetracycline class drugs; or lidocaine or epinephrine
  • Family history of toxic epidermal necrolysis
  • Known allergy or sensitivity to sodium hypochlorite (NaOCl)
  • History of AD or asthma
  • Inability to comply with the requirements of the protocol
  • Pregnant or lactating
  • Subjects with a primary or acquired immunodeficiency, including HIV seropositiviy
  • Any chronic past or present medical illness, including chronic skin diseases like psoriasis
  • Subjects receiving or planning to receive an IND agent, ultraviolet light therapy, monoclonal antibodies, or systemic immunosuppressants
  • Subjects who provide direct healthcare or reside in healthcare facilities or in non-hospital settings such as, assisted living facilities, homeless shelters, jails and prisons as well as subjects with frequent exposure to laboratory animals

Cohort 3 [INACTIVE]: Atopic Dermatitis Patients

  • Does not meet inclusion criteria
  • Any female with symptoms and/or serum hormone levels consistent with perimenopause or menopause
  • Known allergic reaction to beta-lactam class drugs, lidocaine, or epinephrine
  • Family history of toxic epidermal necrolysis
  • Known allergic reaction to sodium hypochlorite (NaOCl)
  • Use of systemic antibiotics within 8 weeks, or topical antibiotics on intended sampling sites within 3 weeks, prior to baseline sampling
  • Use of topical corticosteroids on all intended sampling sites within 7 days, prior to baseline sampling
  • Use of topical or oral CAM agents within 4 weeks of initiation of treatment
  • Subjects with known primary or acquired immunodeficiency
  • Subjects with unstable or uncontrolled medical conditions that could require hospitalization during the initial month of the study or who have been hospitalized for treatment of these conditions in the one month prior to baseline sampling
  • Subjects receiving or planning to receive an IND agent, ultraviolet light therapy, monoclonal antibodies, or systemic immunosuppressants within 7 days or 5 half-lives (whichever is the longer time period) of initiating treatment on this protocol
  • Subjects who are currently receiving or have received chemotherapy or radiation for treatment of malignancies within the previous 6 months
  • Pregnancy or lactating

Cohorts 4 [NO FURTHER ACCRUAL] and 5 [INACTIVE]: Healthy Volunteers

  • Does not meet inclusion criteria
  • Any female with symptoms and/or serum hormone levels consistent with perimenopause or menopause
  • Use of systemic antibiotics in 12 months preceding baseline sampling
  • Use of swimming pools, hot tubs, or whirlpools in 7 days preceding baseline sampling
  • Use of topical or oral complementary/alternative medicine (CAM) agents within 4 weeks of initiation of treatment
  • (Cohort 4 [NO FURTHER ACCRUAL]) Known allergic reaction to sulfa class drugs; or lidocaine or epinephrine
  • (Cohort 5 [INACTIVE]) Known allergic reaction to tetracycline class drugs; or lidocaine or epinephrine
  • Family history of toxic epidermal necrolysis
  • History of AD or asthma
  • Inability to comply with the requirements of the protocol
  • Pregnant or lactating
  • Subjects with a primary or acquired immunodeficiency, including HIV seropositivity
  • Any chronic past or present medical illness, including chronic skin diseases like psoriasis
  • Subjects receiving or planning to receive an IND agent, ultraviolet light therapy, monoclonal antibodies, or systemic immunosuppressants
  • Subjects who provide direct healthcare or reside in healthcare facilities or in non-hospital settings such as assisted living facilities, homeless shelters, jails and prisons as well as subjects with frequent exposure to laboratory animals

Cohort 6: Healthy Volunteers

  • Does not meet inclusion criteria
  • Use of swimming pools, hot tubs, or whirlpools in 7 days preceding sampling
  • Use of topical or oral CAM agents within 1 week or 4 weeks, respectively, prior to sampling
  • Pregnant or lactating females in all cohorts are excluded from participating due to the potential effects of the above listed antimicrobials on the developing human fetus or nursing infant; listed in Sections 11.1 through 11.5. Females of childbearing potential must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while she is participating in this study, she should inform her treating physician immediately. Lactating mothers will discontinue breastfeeding prior to study enrollment.
  • Smokers and subjects who use smokeless tobacco products are excluded in all cohorts due to tobacco s unknown impact on human oral mucosa and microflora.

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:独身

武器と介入

参加者グループ / アーム
介入・治療
アクティブコンパレータ:1A/Cephalexin

Cephalexin + Placebo bleach

500 mg orally every 8 hours for 14 days

アクティブコンパレータ:1B/TMP/SMX

TMP/SMZ DS 800 /160 orally every 12 hours for 14 days

800/160 orally every 12 hours for 14 days

アクティブコンパレータ:1C/Doxycycline 100

Doxycycline 100 mg orally every 12 hours for 56 days

500 mg orally every 8 hours for 14 days

6 % dilute bleach

アクティブコンパレータ:1D/Doxycycline 20

Doxycycline 20 mg orally every 12 hours for 56 days

20 mg orally every 12 hours for 56 days or 100 mg orally every 12 hours for 56 days

アクティブコンパレータ:2A/Cephalexin + Dilute bleach

Systemic antibiotics (Cephalexin) + dilute bleach study bath liquid

500 mg orally every 8 hours for 14 days

6 % dilute bleach

プラセボコンパレーター:2B/Cephalexin + Placebo bleach

Systemic antibiotics (Cephalexin) + placebo study bath liquid

500 mg orally every 8 hours for 14 days

Three times a week for 14 days

プラセボコンパレーター:2C/Placebo capsules + Dilute bleach

Placebo capsules + dilute bleach study bath liquid

6 % dilute bleach

Capsule orally every 8 hours daily for 14 days

プラセボコンパレーター:2D/Placebo capsules + Placebo bleach

Placebo capsules + placebo study bath liquid

Three times a week for 14 days

Capsule orally every 8 hours daily for 14 days

アクティブコンパレータ:3A/Cephalexin + Dilute bleach

Systemic antibiotics (Cephalexin) + dilute bleach study bath liquid

500 mg orally every 8 hours for 14 days

6 % dilute bleach

プラセボコンパレーター:3B/Cephalexin + Placebo bleach

Systemic antibiotics (Cephalexin) + placebo study bath liquid

500 mg orally every 8 hours for 14 days

Three times a week for 14 days

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Characterize microbiome alterations
時間枠:2 weeks

Difference in Shannon Diversity Indices (SDI) from baseline to day 14.

2 weeks

二次結果の測定

結果測定
時間枠
健康な成人ボランティアからサンプルを入手して、ヒト微生物のゲノム分析を評価および改良する。
時間枠:研究期間中ずっと
研究期間中ずっと
さまざまな抗菌薬がヒトのマイクロバイオームをどのように変化させるかを調べること。
時間枠:研究期間中ずっと
研究期間中ずっと

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

捜査官

  • 主任研究者:Heidi H Kong, M.D.、National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2012年9月18日

一次修了 (推定)

2027年1月1日

研究の完了 (推定)

2027年1月1日

試験登録日

最初に提出

2012年6月28日

QC基準を満たした最初の提出物

2012年6月28日

最初の投稿 (推定)

2012年6月29日

学習記録の更新

投稿された最後の更新 (実際)

2026年10月29日

QC基準を満たした最後の更新が送信されました

2026年10月28日

最終確認日

2026年10月22日

詳しくは

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。

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