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The Natural History of Gene Expression in the Lung Cells of Non-Smokers, Smokers and Ex-Smokers in Health and Disease

2020년 7월 24일 업데이트: Weill Medical College of Cornell University

The Natural History of Gene Expression in Lung Cells of Non-Smokers, Smokers, and Ex-Smokers in Health and Disease

Cigarette smoking is the major risk factor for chronic obstructive pulmonary disease (COPD, commonly known as chronic bronchitis and emphysema). Despite this clear link, only 15-20% of smokers develop COPD suggesting that genetic factors affect the lung's susceptibility to the stress of cigarette smoke. The cells lining the airways (epithelium) and cells that help defend the lung (alveolar macrophages) of smokers develop gene expression changes that are different from that of nonsmokers. In the investigators' previous studies they have demonstrated that there are greater than 200 genes that are responsive to cigarette smoke in these cells. But the investigators do not know whether the gene expression is static or changes as a function of time. Genes that show significant changes over time may be relevant to the progression of the disease. Even though quitting smoking reduces the rate at which the lungs decline, many-smokers still go on to develop COPD. This study will provide insights into the natural history of smoking-related gene expression of the lung cells in health and disease.

연구 개요

상태

완전한

정황

상세 설명

Cigarette smoke is responsible for the majority of lung cancers and is the major cause of COPD, the fourth leading cause of death in the United States. Despite the well established causal role of cigarette smoking in lung cancer and COPD, only 10-20% of smokers actually develop these diseases. This suggests that there are genetic predisposing factors that place some individuals at greater risk. Our prior work shows that healthy smokers (cigarette smokers with normal history, physical exam, lung function tests and chest x-rays) and smokers with COPD have marked up and down regulation of greater than 200 genes in the small airway epithelium and alveolar macrophages. There is however, a varied response to smoking among individuals, with some individuals abnormally expressing far fewer genes. The focus of this study is to evaluate the hypothesis that the response of the lung cells to the stress of smoking is unique to each individual but is consistent over time. Furthermore, individuals that stop smoking will each have a unique response, but is constant over time for each individual. By defining the patterns of biologic response over time among smoking, ex-smoking and nonsmoking subjects, we will be able to identify common biologic pathways as potential targets for intervention.

연구 유형

관찰

등록 (실제)

171

연락처 및 위치

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연구 장소

  • 미국
    • New York
      • New York, New York, 미국, 10065-4870
        • Weill Cornell Medical College and Weill Cornell Medical Center, Department of Genetic Medicine

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

18년 이상 (성인, 고령자)

건강한 자원 봉사자를 받아들입니다

예

연구 대상 성별

모두

샘플링 방법

비확률 샘플

연구 인구

New York Metropolitan area residents

설명

Inclusion Criteria:

Group A: Healthy nonsmokers

  • All study individuals should be enrolled in the "Airway" protocol #1204012331 "Collection of Airway, Blood and/or Urine Specimens from Subjects for Research Studies"
  • Willing and able to provide informed consent for the long term follow up study with repeated bronchoscopies
  • Male and Female subject ≥18 years of age
  • Never smokers is defined as someone who has smoked < 100 cigarettes per lifetime and whose urine nicotine <2 ng/mL and/or urine cotinine <5 ng/mL, at entry into the study

Group B: Healthy current smokers Inclusion:

  • All study individuals should be enrolled in the "Airway" protocol
  • Willing and able to provide informed consent for the long term follow up study with repeated bronchoscopies
  • Male and Female subject ≥18 years of age
  • Active smoker as evidenced by self-report and urine nicotine >30 ng/mL and/or urine cotinine >50 ng/mL

Group C: Healthy smokers who elect to stop smoking Inclusion:

  • All study individuals should be enrolled in the "Airway" protocol
  • Willing and able to provide informed consent for the long term follow up study with repeated bronchoscopies
  • Male and Female subject ≥18 years of age
  • Current smoker as evidenced by self-report and urine nicotine >30 ng/mL and/or urine cotinine >50 ng/mL
  • Be a current smoker willing to stop smoking

Group D - Current smokers with COPD Inclusion:

  • All study subjects will be enrolled in the "Airway" protocol #1204012331 "Collection of Airway, Blood and/or Urine Specimens from Subjects for Research Studies"
  • All study subjects should meet the lung disease criteria for having COPD may be of any stage (GOLD I - IV), be ambulatory and have no evidence of respiratory failure
  • All study subjects should be able to provide informed consent for the long term follow up study with repeated bronchoscopies
  • Male and Female subject ≥18 years of age
  • Active smokers as evidenced by urine nicotine >30 ng/mL and/or urine cotinine >50 ng/mL

Group E - Current smokers with COPD who elect to stop smoking Inclusion:

  • All study subjects will be enrolled in the "Airway" protocol #1204012331 "Collection of Airway, Blood and/or Urine Specimens from Subjects for Research Studies"
  • All study subjects should meet the lung disease criteria for having COPD may be of any stage (GOLD I - IV), be ambulatory and have no evidence of respiratory failure
  • All study subjects should be able to provide informed consent for the long term follow up study with repeated bronchoscopies
  • Male and Female subject ≥18 years of age
  • Active smokers as evidenced by urine nicotine >30 ng/mL and/or urine cotinine >50 ng/mL
  • Be a current smoker willing to stop smoking

Exclusion Criteria:

Groups A - E

  • Individuals unable to provide proper informed consent
  • Habitual use of drugs and/or alcohol within the past six months (Acceptable: Marijuana one time in three months; average of two alcoholic beverages per day; drug and/or alcohol abuse is defined as per the DSM-IV Substance Abuse Criteria)
  • Individuals with asthma and with recurrent or recent (within three months) and/or acute pulmonary infection
  • Individuals with allergy to lidocaine
  • Significant kidney disease or subjects on dialysis
  • Females who are pregnant or lactating or intending to become pregnant in the next 12 months
  • Subjects who are HIV positive
  • Subjects that have unstable coronary artery disease as evidenced by unstable angina, >Class II New York Heart Association (NYHA) cardiac status, history of congestive heart failure or MI within the last 12 months
  • Subjects who are contraindicated for undergoing bronchoscopy
  • Subjects having any medical condition that in the opinion of the investigator would preclude the subject from entering the study

Groups D and E

- Subjects may not have evidence of respiratory failure such as SpO2 <90% or PaO2 <60 mmHg

Groups C and E

  • Current major depression or other significant psychiatric disorder
  • Subjects currently taking anti-depressant medication

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

코호트 및 개입

그룹/코호트
A-Healthy Non smokers
Healthy nonsmokers. Defined as non-smokers by self report and urine cotinine levels consistent with a nonsmoker (urine cotinine <5 ng/mL).
B-Healthy smoker
Healthy current smokers. Subjects categorized as healthy according to criteria under "Collection" (#1204012331) protocol.
C-Healthy smoker to quit
Healthy smokers willing to quit. Defined by self-report and urine cotinine levels consistent with an active smoker (urine cotinine >50 ng/mL).
D-Current smoker w. COPD
Current smokers with COPD. COPD as defined by the GOLD criteria and currently smoking as defined by self-report and urine cotinine levels consistent with an active smoker (urine cotinine >50 ng/mL)
E-Current COPD smoker to quit
Current smokers with COPD willing to stop smoking. Subjects have COPD as defined by the GOLD criteria

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Evaluate gene expression over time
기간: 12/31/2013
To prospectively assess changes in lung cell gene expression over time in healthy nonsmokers, healthy smokers and smokers with COPD. To examine what smoking-induced gene expression changes occur in the lung cells of healthy smokers and COPD smokers over time in response to cessation of smoking.
12/31/2013

2차 결과 측정

결과 측정
측정값 설명
기간
Quitters who return to smoking and the effects on gene expression
기간: 12/31/2012
In individuals who quit but start smoking again despite the standard smoking cessation therapy, what are the effects on gene expression of returning to smoking. To assess whether baseline gene expression determines what genes rapidly change to a more "normal" expression pattern with smoking cessation. Does having established COPD determine the relative reversibility of the gene expression pattern with smoking cessation compared to healthy smokers.
12/31/2012

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Weill Medical College of Cornell University

간행물 및 유용한 링크

연구에 대한 정보 입력을 담당하는 사람이 자발적으로 이러한 간행물을 제공합니다. 이것은 연구와 관련된 모든 것에 관한 것일 수 있습니다.

일반 간행물

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (실제)

2009년 8월 1일

기본 완료 (실제)

2013년 6월 1일

연구 완료 (실제)

2013년 6월 1일

연구 등록 날짜

최초 제출

2009년 9월 9일

QC 기준을 충족하는 최초 제출

2009년 9월 9일

처음 게시됨 (추정)

2009년 9월 10일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2020년 7월 27일

QC 기준을 충족하는 마지막 업데이트 제출

2020년 7월 24일

마지막으로 확인됨

2020년 7월 1일

추가 정보

이 연구와 관련된 용어

키워드

추가 관련 MeSH 약관

기타 연구 ID 번호

  • 0905010391

개별 참가자 데이터(IPD) 계획

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미정

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