Doxycycline In Lymphangioleiomyomatosis (LAM)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified June 2012 by University of Nottingham.
Recruitment status was  Active, not recruiting
Sponsor:
Information provided by (Responsible Party):
University of Nottingham
ClinicalTrials.gov Identifier:
NCT00989742
First received: October 2, 2009
Last updated: June 14, 2012
Last verified: June 2012
  Purpose

The purpose of the study is to test if the drug doxycycline is effective in slowing the progression of lung disease in LAM. Lymphangioleiomyomatosis (LAM) is a rare lung disease which affects young women. Women with LAM develop enlarged air spaces in the lungs called cysts, caused by an excess of matrix metalloproteinases (MMPs), protein-digesting enzymes. LAM is associated with kidney tumours, called angiomyolipomas, and causes recurrent lung collapse, breathlessness and death or need for lung transplant. There is no proven treatment. Doxycycline, a commonly used antibiotic can block MMP production and a small number of patients have shown some benefit from doxycycline. The investigators will perform a study to test if doxycycline can slow the fall in lung function in patients with LAM. Forty patients who consent to participate will take doxycycline or a placebo (dummy) tablet for two years in addition to their standard treatment.


Condition Intervention Phase
Lymphangioleiomyomatosis
Tuberous Sclerosis
Drug: Doxycycline
Drug: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator)
Primary Purpose: Treatment
Official Title: A Randomised, Double Blind, Placebo Controlled Trial of Doxycycline in Lymphangioleiomyomatosis.

Resource links provided by NLM:


Further study details as provided by University of Nottingham:

Primary Outcome Measures:
  • Mean rate of change of FEV1 over 24 months on doxycycline compared with placebo. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • Rate change FVC over 24 months Change DLCO at 12 & 24 mths Change in shuttle walk distance at 12 & 24 mths Change in QOL at 12 & 24 mths Time to composite safety endpoint Number complications Number respiratory infections Adverse effects [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 40
Study Start Date: July 2009
Estimated Study Completion Date: June 2013
Estimated Primary Completion Date: April 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Doxycycline Drug: Doxycycline
50mg od
Placebo Comparator: Placebo Drug: Placebo
50mg od

  Hide Detailed Description

Detailed Description:

Summary

We will perform a 2 year double blind, placebo controlled trial of doxycycline in 40 patients with LAM. The main endpoints will be change in FEV1, other measures of efficacy, safety and dose required to suppress MMP activity. After clinical evaluation, lung function, shuttle walk, QoL assessment, blood tests, serum and urine MMPs (termed full assessment) plus baseline chest X-ray patients will be randomised to doxycycline 50 mg od or placebo. Patients will be assessed at 2 weeks for a safety screen, every 3 months for clinical evaluation and spirometry and at 12 and 24 months for full assessment. At 3 months urine zymography will be performed to see if MMPs are present in urine at the prescribed dose. Doxycycline will be increased to 100 mg bd at three months after urine zymography has been performed. To avoid withholding treatment from those who decline rapidly, patients who, on two occasions, have either a fall from baseline FEV1 of 300 ml or fall in resting SaO2 of 3% will be assessed by an independent expert (AET). Patients receiving placebo will be given the option of doxycycline according to protocol. Those receiving doxycycline the option of continuing in the study or withdrawal. These patients and those withdrawn due to recurrent pneumothorax, increase in chylous effusion or bleeding angiomyolipoma will be included in a composite safety endpoint and analysed on an intention to treat basis. Power calculations based on retrospective cohorts(Johnson and Tattersfield 1999) show that 20 patients per group will give 80% power to detect a 70 ml/year difference in FEV1 based an assumed SD for a fall in FEV1 of 75 ml/year. The mean slope of regression lines for FEV1 and FVC, plus change DLCO, shuttle walk distance and QoL in the doxycycline and placebo groups will be compared by parametric or non-parametric analysis dependent on data, time to composite safety endpoint by Caplan-Meier analysis, complications and adverse events by Chi Square test.

1. Introduction

Lymphangioleiomyomatosis Lymphangioleiomyomatosis (LAM) is a disease of the lungs and lymphatics, which can occur sporadically or in association with tuberous sclerosis complex (TSC). The disease is rare, occurring in 1-2 / million of the population but in up to 40% of women with TSC LAM almost exclusively affects women, generally developing before the menopause. The disease is characterised by progressive pulmonary cystic change, recurrent pneumothorax, chylous pleural collections and, in most cases, progressive respiratory failure. Abdominal manifestations caused by obstruction and dilation of the axial lymphatics include lymphadenopathy, cystic lymphatic masses (lymphangioleiomyomas), chylous ascites and angiomyolipoma (a benign tumour). Survival in LAM is, 70 90% at 10 yrs, although this is highly variable since long-term survivors have been described. Diagnosis is made by a combination of clinical features and computed tomography scanning or, in cases of doubt, lung biopsy. In patients with rapidly progressive disease, hormone treatment (predominantly progesterone) has been used, although no firm evidence supports its use. Otherwise, treatment is aimed at complications including pneumothorax, chylous collections and extra-pulmonary manifestations. The only treatment for severe LAM is currently lung transplantation(Johnson 2006). Recently identification of abnormalities in the tuberous sclerosis complex (TSC) genes in sporadic and TSC associated LAM have identified dysregulation of the mTOR pathway in LAM (Carsillo, Astrinidis et al. 2000; Sato, Seyama et al. 2002) and have lead to clinical trials of mTOR inhibitors such as rapamycin in LAM and TSC. At the time of writing these have not been reported but appear promising.

Background and preliminary data Cystic lung destruction is the hallmark of pulmonary LAM and generally results in respiratory failure over a variable period of time(Johnson 2006). Over-activity of proteases including elastase, trypsin and the matrix metalloproteinases (MMPs) is responsible for parenchymal destruction in emphysema and other lung diseases. The MMPs are a family of zinc dependent proteolytic enzymes with proteolytic activities against extra-cellular matrix proteins. The MMPs are overexpressed in inflammatory and neoplastic diseases where in addition to processing extra-cellular matrix they also have roles in metastasis, angiogenesis, growth factor activation and inactivation(Stamenkovic 2003). MMPs -1, -2, and -9 are involved in the sequential digestion of collagen and gelatin and are strongly expressed in the walls of cysts where it is thought they contribute to parenchymal destruction in LAM(Matsui, Takeda et al. 2000). Further, MMPs can be detected by gelatin zymography in the urine of patients with LAM but not controls. Doxycycline is a tetracycline antibiotic in common clinical use. In addition to its antimicrobial action it inhibits the synthesis and activity of several MMPs and inhibits proliferation of a range of cell types including arterial smooth muscle, cancer cells and cancer model systems(Bendeck, Conte et al. 2002; Duivenvoorden, Popovic et al. 2002; Onoda, Ono et al. 2004). In preliminary experiments we have demonstrated that primary LAM derived and angiomyolipoma cells produce MMP-2 and -7 and that MMP expression and proliferation in these cells in inhibited by doxycycline.

Preliminary clinical data of doxycycline in LAM In a preliminary open label study of doxycycline (50 - 100 mg qds) in 10 patients with LAM, doxycycline improved 6 minute walk distance) and Borg dyspnoea score (Glassberg et al. Data presented at the LAM Foundation International Research Conference, Cincinnati Ohio 2006). In a single case report, Moses et al. observed an improvement in FEV1 and oxygenation during exercise in a patient with LAM treated with 100mg doxycycline daily (Moses, Harper et al. 2006). In both of these cases MMP-2 and -9 were initially present in the patient's urine and was undetectable after treatment with doxycycline. In a study of 14 patients, doxycycline 100mg bd is known to give a mean plasma concentration of 4.41 µg/ml (range 1.9-9.4 µg/ml)(Prall, Longo et al. 2002).

Specific issues in orphan disease clinical trials and rationale for trial design Studying orphan diseases presents specific challenges, specifically the limited number of patients available, wide geographic distribution and low priority for funding due to the perceived poor economic benefit. Patients are well informed about potential developments due to patient groups and internet based information(Tattersfield and Glassberg 2006) and may obtain potential treatments 'off label' making definitive research studies impossible. As LAM is rare, cohorts drawn from a wide area are required for studies to achieve adequate power. We have 15 years experience of LAM research and from our UK LAM database estimate there are approximately 120 patients in the UK. We are currently performing an open label study of Sirolimus in LAM and tuberous sclerosis (TESSTAL, a Study of The Efficacy and Safety of Sirolimus (Rapamycin) Therapy for Renal Angiomyolipomas in Patients with Tuberous Sclerosis Complex And Sporadic Lymhangioleiomyomatosis). This included six patients with LAM whom we found to be well motivated and will travel long distances for study visits (including Cornwall, Kent and Perth). Despite the known adverse effects of rapamycin six of eight eligible (i.e. with LAM and angiomyolipoma) patients invited took part in the study. The current study protocol has been designed as a simple protocol which is both inclusive of most patients with LAM and has a follow up which is similar to routine clinical care which we hope will facilitate recruitment. In addition the protocol is less demanding than that of the TESSTAL study. As most patients are known to us via our database or clinical contacts we expect recruitment to be complete within six months.

Designing a definitive study is difficult without having an estimate of the likely size of effect, if this is large, as suggested by the one case report(Moses, Harper et al. 2006) a small number of patients are needed. If it is small as seems more likely a priori, a larger number of patients are needed requiring European collaboration and considerably greater funding. We therefore designed a pragmatic pilot study using a single geographic population with a simple, inexpensive protocol which will serve several functions, specifically to: (1) determine the optimum dose of doxycycline needed to suppress MMP production. (2) define the safety profile of doxycycline in LAM. (3) provide evidence of efficacy and size of effect. (4) provide data to help optimise the design and logistics of future trials.

2 Study aims/objectives

Hypothesis Doxycycline will prevent matrix metalloproteinase dependent tissue destruction in lymphangioleiomyomatosis (LAM) thus preserving lung function, exercise capacity and quality of life.

We will perform a randomised placebo controlled trial of doxycycline on rate of decline of FEV1 over two years against matched placebo. This study will:

  1. determine the optimum dose of doxycycline needed to suppress MMP production.
  2. define the safety profile of doxycycline in LAM.
  3. provide evidence for efficacy and size of effect.
  4. provide data to help optimise the design and logistics of future trials.

With the data obtained we will be in a strong position to apply for European funding for a European wide trial should this still be required.

3 Investigational plan

Patient population and recruitment

Forty patients with either sporadic LAM or TSC-LAM will be recruited from the UK LAM database, physician referrals, LAM Action (a patients group for women with LAM) and the Tuberous Sclerosis Association. Patients will be contacted by mail by the principal investigator. Potential participants will receive a preliminary information sheet and response sheet for return by prepaid post. Those that express a potential interest in participating will be offered a face to face interview with one of the study doctors to assess eligibility, answer questions, obtain details of all physicians involved in their care and obtain written consent prior to enrolment. We anticipate recruitment will be complete within 12 months of starting the study.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Sporadic LAM diagnosed either by cystic lung disease on HRCT classical of LAM plus angiomyolipoma or chylous effusion or cystic lung disease on HRCT and tissue biopsy showing LAM or angiomyolipoma
  • TSC-LAM diagnosed by cystic lung disease on HRCT and tuberous sclerosis diagnosed by TSC consensus criteria(13).
  • Patients with either an FEV1 below 80% predicted or evidence of a 20% deterioration in FEV1.
  • Hormone and bronchodilator treatment for LAM* is allowed providing treatment has not changed in the three months prior to enrollment.

    • progesterone, GnRh agonists and bronchodilators

Exclusion Criteria:

  • Inability to give informed consent.
  • Mental retardation.
  • Age less than 18 years.
  • Pneumothorax, chylous effusion, bleeding angiomyolipoma or change in hormone treatment within 3 months.
  • Previous organ transplantation.
  • Severe or uncontrolled epilepsy.
  • Use of any oral contraceptive pill.
  • Pregnancy or breast feeding. Pre-menopausal patients must be willing to use appropriate birth control measures to avoid pregnancy while enrolled in the study.
  • Major systemic diseases (malignancy, myocardial infarction or unstable angina, type1 diabetes, severe hypertension, liver cirrhosis).
  • Use of drugs known to interact with doxycycline, including anticoagulation with warfarin.
  • Anticoagulation with warfarin.
  • Hypersensitivity to tetracyclines.
  • Treatment with mTOR inhibitor within the previous 3 months (sirolimus, everolimus).
  • Use of doxycycline or other experimental drug within the previous three months.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00989742

Locations
United Kingdom
Nottingham University Hospitals
Nottingham, United Kingdom, NG7 2UH
Sponsors and Collaborators
University of Nottingham
Investigators
Principal Investigator: Simon R Johnson, DM FRCP University of Nottingham
  More Information

Publications:

Responsible Party: University of Nottingham
ClinicalTrials.gov Identifier: NCT00989742     History of Changes
Other Study ID Numbers: 07061
Study First Received: October 2, 2009
Last Updated: June 14, 2012
Health Authority: United Kingdom: Medicines and Healthcare Products Regulatory Agency

Keywords provided by University of Nottingham:
lymphangioleiomatosis
LAM
tuberous sclerosis
doxycycline
matrix metalloproteinases
MMP

Additional relevant MeSH terms:
Lymphangioleiomyomatosis
Sclerosis
Tuberous Sclerosis
Congenital Abnormalities
Genetic Diseases, Inborn
Hamartoma
Heredodegenerative Disorders, Nervous System
Immune System Diseases
Immunoproliferative Disorders
Lymphangiomyoma
Lymphatic Diseases
Lymphatic Vessel Tumors
Lymphoproliferative Disorders
Malformations of Cortical Development
Neoplasms
Neoplasms by Histologic Type
Neoplasms, Connective and Soft Tissue
Neoplasms, Multiple Primary
Neoplastic Syndromes, Hereditary
Nervous System Diseases
Nervous System Malformations
Neurocutaneous Syndromes
Neurodegenerative Diseases
Pathologic Processes
Perivascular Epithelioid Cell Neoplasms
Doxycycline
Anti-Bacterial Agents
Anti-Infective Agents
Antimalarials
Antiparasitic Agents

ClinicalTrials.gov processed this record on October 23, 2014