Safety and Efficacy of Saracatinib In Subjects With Lymphangioleiomyomatosis

Pulmonary Lymphangioleiomyomatosis Clinical Trial

— SLAM-2  

Official title:

Safety and Efficacy of Saracatinib In Subjects With Lymphangioleiomyomatosis

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT02737202
• Other study ID #: SLAM 7602
• Secondary ID: 4UH3TR000961-02
• Status: Terminated
• Phase: Phase 2
• Start date: April 2016
• Est. completion date: July 30, 2019

Study information

• Verified date: July 2020
• Source: Baylor College of Medicine
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This study is being done to determine if there is a potential benefit of saracatinib in LAM subjects. Based on the information of this trial, additional clinical development trials will be needed. The study will also test the tolerability of 125 mg of saracatinib given once daily over a 9 month period.

Description:

Tuberous sclerosis complex (TSC) is an autosomal dominant disorder caused by mutations in tuberous sclerosis complex 1 (TSC1) or TSC2 tumor suppressor genes. TSC is characterized by tumors in a wide range of tissues, seizures, mental retardation, autism, and organ failure. Lymphangioleiomyomatosis (LAM), the major pulmonary manifestation in women with TSC, is a progressive lung disease characterized by infiltration of atypical smooth muscle like cells (TSC-/- LAM cells) and formation of parenchymal cysts. Sporadic LAM can develop in women who do not meet the criteria for the diagnosis of TSC, owing to somatic mutations in the TSC2 gene.

The long term goal of this research is to devise novel therapeutic strategies for patients with LAM. The observed behavior of LAM cells with respect to their infiltrative growth pattern, metastatic potential, and altered cell differentiation is reminiscent of cells undergoing epithelial-mesenchymal transition (EMT). Src kinases are key regulators of cellular proliferation, motility, invasiveness and EMT. Recent results have shown that autophagy promotes degradation of active Src. Thereby, decreased autophagy due to mTOR activation known to occur in LAM cells, may play a significant role in accumulation of active Src in these cells. Src suppresses transcription of E-cadherin by upregulating its transcriptional repressors. The preliminary data reveal an increase in active Src in lung tissues of patients with LAM as well as in cultured TSC2-/- cells. Further, in TSC2-/- cells, E-cadherin is considerably reduced and does not localize to the plasma membrane, as it does in wild-type cells.

The focus of this study is to examine if Src inhibition represents a potential therapeutic strategy in LAM. It is proposed that Src activation in TSC2-/- cells results in the reduction of E-cadherin, loss of cell-cell adhesion and elevation of oncogenic and metastatic potential of these cells. The increased Src activity in TSC2-/- cells is likely caused by inhibition of autophagy associated with hyper-activation of mTOR. Therefore, the use of Src inhibitors may lead to a reduction in tumor growth and prevent dissemination of TSC2-/- cells. In this study, the investigators will evaluate the safety and efficacy of Src inhibition in subjects with LAM.

A number of inhibitors of Src are now in clinical trials in patients with a range of different tumors. Dasatinib, an oral adenosine triphosphate (ATP)-competitive Src inhibitor, is now approved for clinical use in patients with chronic myeloid leukemia or acute lymphoblastic leukemia. However, dasatinib has wider 'off target' inhibitory activity than saracatinib including potent activity against Abl, ephrin receptor kinases, platelet-derived growth factor receptor and c-KIT (type of receptor tyrosine kinase and a type of tumor marker. Also called CD117 and stem cell factor receptor.) In contrast, saracatinib has a >10-fold preference for Src over Abl kinases and has very little activity against other tyrosine and serine/threonine kinases. Saracatinib has been already characterized in multiple clinical trials in terms of safety and pharmacokinetics.

The investigators have conducted a Phase1b study to test the safety of various doses of Saracatinib in LAM subjects. The purpose of the Phase1b trial was to determine the optimal dose in terms of safety and tolerability in LAM population. Three escalating doses of saracatinib; 50, 125 and 175 mg were studied. Saracatinib was given orally once a day. Overall, subjects tolerated Saracatinib well. The investigators chose the dose of 125 mg to conduct further testing of both safety and efficacy in this Phase 2a trial.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 28
• Est. completion date: July 30, 2019
• Est. primary completion date: July 30, 2019
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 18 Years to 65 Years

Eligibility

Inclusion Criteria:

• Female patients. It should be noted that LAM occurs almost exclusively in women.

• 18 to 65 years of age.

• All patients must have a diagnosis of LAM as defined by compatible cystic changes on chest computed tomography (CT) and one of the following:

• Open lung, transbronchial or thoracic needle biopsy consistent with LAM

• Open or needle abdominal biopsy findings consistent with LAM

• Clinical findings of tuberous scleroma complex (TSC), renal angiomyolipoma, cystic abdominal lymphangiomas, or history of chylous effusion in the chest or abdomen

• Serum vascular endothelial growth factor D (VEGF-D) > 800 pg/ml

• Subjects must have had a recent reduction in forced expiratory volume at 1-second (FEV1) of > 50ml/year, as shown by at least two pulmonary function testing (PFT) measured at least 6 months apart in the last 24 months prior to enrolling study.

Exclusion Criteria:

• Current infection.

• Major surgery within the past 2 months

• Advanced hematologic, renal, hepatic, non-LAM lung disease or metabolic diseases; or BMI of >35

• The use of another investigational drug within 30 days

• The use of mTOR (mammalian target of rapamycin) inhibitors within 30 days

• Previous lung transplantation.

• Inability to attend scheduled clinic visits

• Inability to give informed consent

• Inability to perform pulmonary function testing

• History of malignancy in the past two years, other than squamous or basal cell skin cancer or status post successful excision or treatment.

• Nursing mothers

• Current or planned pregnancy.

• Not using adequate contraception (in woman of childbearing potential).

• Significant clinical change in health in the past 30 days

Related Conditions & MeSH terms

• Lymphangioleiomyomatosis
• Pulmonary Lymphangioleiomyomatosis

Intervention

Drug:
• saracatinib
Subjects will receive enough tablets for 90 days +/- 14 days at each visit. Subject will have visits every 90 days for drug accountability as well as safety and efficacy testing to include pulmonary function testing, laboratory testing to include liver and kidney profile, urine pregnancy testing at each visit, vital signs, physical examination - any medically significant changes from baseline visit will be recorded, all adverse events will be monitored until resolution.

Locations

Country	Name	City	State
United States	Laboratory of Translational Research NHLBI	Bethesda	Maryland
United States	Loyola Medical Center	Chicago	Illinois
United States	University of Cincinnati	Cincinnati	Ohio
United States	Baylor College of Medicine - Ben Taub General Hospital	Houston	Texas
United States	Stanford University	Stanford	California

Sponsors (7)

Lead Sponsor	Collaborator
Baylor College of Medicine	Brigham and Women's Hospital, Loyola University, National Institutes of Health (NIH), Stanford University, University of Cincinnati, University of South Florida

Country where clinical trial is conducted

United States, 

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* Note: There are 39 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Pulmonary Function Testing		12 months
Primary	FEV1		9 months
Secondary	Angiomyolipoma measured volumetrically on MRI		12 months
Secondary	Lung Cyst size measured on chest CT		9 months
Secondary	VEGF-D serum levels		12 months