Budget Impact Analysis of Eliglustat for the Treatment of Gaucher Disease Type 1 in the United States.

BACKGROUND: Gaucher disease type 1 (GD1) is a rare, genetic, lysosomal storage disease with no cure. Current treatment options include intravenous (IV) enzyme replacement therapy ([ERT]; imiglucerase, velaglucerase alfa, or taliglucerase alfa) or oral substrate reduction therapy ([SRT]; eliglustat or miglustat). The cost to U.S. payers of an IV-administered drug can vary depending on the site of care (i.e., home, outpatient clinic, or hospital setting). Treatment with oral eliglustat may present an opportunity for cost savings. OBJECTIVE: To evaluate the budget impact from a U.S. payer perspective associated with transitioning patients receiving ERTs to the oral SRT eliglustat for the treatment of adults with GD1. METHODS: A budget impact model estimated the change in pharmaceutical and administration costs resulting from increasing the market share of eliglustat from 12% (current) to 44% (new). The market share for eliglustat was drawn equally from existing shares of imiglucerase (40%) and velaglucerase alfa (40%) and assumed to be static over the analysis period. ERT costs were adjusted to account for site of care-based markup and the proportion of patients receiving infusions in each site of care (home, infusion center, or hospital outpatient). Annual ERT costs were calculated assuming a biweekly dose of 47.4 U per kg, a 72-kg patient weight, and 24 infusions per year. The effect of key variables was tested in the sensitivity analyses. All costs are expressed in 2017 U.S. dollars. RESULTS: In a new plan with 5 million members and 25 GD1 treated patients, increased use of eliglustat resulted in an annual savings of $1,526,710 and a total savings of $4,580,130 (13.6%) over 3 years. The corresponding annual per member per month savings was $0.025. This is further illustrated in the sensitivity and scenario analyses where the use of eliglustat was cost saving in all cases. Shifting more patients receiving ERT in the hospital outpatient setting to eliglustat resulted in increased savings. CONCLUSIONS: Based on these analyses, increased use of eliglustat resulted in meaningful cost savings to a payer's overall budget. Cost savings are highest among patients switching from ERT administered in a hospital outpatient setting. The results suggest that cost savings are also likely achievable from initiating patients on oral eliglustat instead of infusion-based therapy from the outset of treatment. DISCLOSURES: This study was sponsored by Sanofi Genzyme. Evidera received funding from Sanofi Genzyme to conduct this study and prepare the manuscript. The sponsor collaborated on the study design, analysis, interpretation of results, and writing of the manuscript. Nalysnyk is an employee of and shareholder in Sanofi Genzyme. Ward, Cele, and Uyei are employees of Evidera, which provides consulting and other research services to biopharmaceutical companies. Sugarman was also an Evidera employee when the study was being conducted and the manuscript written. This study was presented as a poster at the Academy of Managed Care Pharmacy Nexus 2016, October 3-6, 2016; National City, MD, and at the International Society for Pharmacoeconomics and Outcomes Research, 22nd Annual International Meeting; May 20-24, 2017; Boston, MA.

Imiglucerase in the treatment of Gaucher disease: a history and perspective.

The scientific and therapeutic development of imiglucerase (Cerezyme(®)) by the Genzyme Corporation is a paradigm case for a critical examination of current trends in biotechnology. In this article the authors argue that contemporary interest in treatments for rare diseases by major pharmaceutical companies stems in large part from an exception among rarities: the astonishing commercial success of Cerezyme. The fortunes of the Genzyme Corporation, latterly acquired by global giant Sanofi SA, were founded on the evolution of a blockbuster therapy for a single but, as it turns out, propitious ultra-orphan disorder: Gaucher disease.

Stakeholder involvement in expensive drug recommendation decisions: an international perspective.

OBJECTIVES: To describe stakeholder involvement in the priority setting and appeals processes across five drug reimbursement recommendation committees. METHODS: We conducted qualitative case studies of how five independent drug advisory committees from Canada, Israel, England and Wales, Australia, and the USA made funding decisions for six expensive drugs. Interviews with 48 informants were conducted with committee members, patient groups, and industry representatives. RESULTS: Different stakeholders were allowed, in varying degrees, to participate in the formal mechanisms for revisions and appeals of decisions. Participants identified a number of stakeholder groups who were already involved in the process, as well as stakeholders whom they believed should be included in the decision-making process. CONCLUSIONS: A central component of a legitimate and fair priority setting process is to make priority setting explicit and to involve both pertinent values and stakeholders in decision-making. Study participants believed that the involvement of multiple stakeholder groups within the deliberative and appeals/revisions processes would contribute to a fair and legitimate drug reimbursement process.

A plant-derived recombinant human glucocerebrosidase enzyme--a preclinical and phase I investigation.

UNLABELLED: Gaucher disease is a progressive lysosomal storage disorder caused by the deficiency of glucocerebrosidase leading to the dysfunction in multiple organ systems. Intravenous enzyme replacement is the accepted standard of treatment. In the current report, we evaluate the safety and pharmacokinetics of a novel human recombinant glucocerebrosidase enzyme expressed in transformed plant cells (prGCD), administered to primates and human subjects. Short term (28 days) and long term (9 months) repeated injections with a standard dose of 60 Units/kg and a high dose of 300 Units/kg were administered to monkeys (n = 4/sex/dose). Neither clinical drug-related adverse effects nor neutralizing antibodies were detected in the animals. In a phase I clinical trial, six healthy volunteers were treated by intravenous infusions with escalating single doses of prGCD. Doses of up to 60 Units/kg were administered at weekly intervals. prGCD infusions were very well tolerated. Anti-prGCD antibodies were not detected. The pharmacokinetic profile of the prGCD revealed a prolonged half-life compared to imiglucerase, the commercial enzyme that is manufactured in a costly mammalian cell system. These studies demonstrate the safety and lack of immunogenicity of prGCD. Following these encouraging results, a pivotal phase III clinical trial for prGCD was FDA approved and is currently ongoing. TRIAL REGISTRATION: ClinicalTrials.gov NCT00258778.

Lysosomal storage diseases: natural history and ethical and economic aspects.

Potential treatment for lysosomal diseases now includes enzyme replacement therapy, substrate reduction therapy, and chaperone therapy. The first two of these have been implemented commercially, and the spectrum of diseases that are now treatable has expanded from Gaucher disease to include several other disorders. Treatment of these diseases is extremely costly. We explore some of the reasons for the high cost and discuss how, by proper selection of patients and appropriate dosing, the economic burden on society of treating these disease may be ameliorated, at least in part. However, the cost of treating rare diseases is a growing problem that society needs to address.

Management of Gaucher disease in a post-communist transitional health care system: Croatian experience.

AIM: To evaluate the feasibility of financing the treatment of Gaucher disease with recombinant human imiglucerase in the Croatian health care system. METHODS: Treatment with enzyme replacement therapy of 5 patients with Gaucher disease was started on January 2001. In 4 patients the typical signs of Gaucher disease (organomegaly, bone changes, anemia, and thrombocytopenia) were documented at the time of diagnosis. One patient received bone marrow stem cell transplant as treatment for acute myeloid leukemia from a HLA-matching sibling with Gaucher disease. All patients underwent therapy with imiglucerase (Cerezyme) infusion every 14 days. The outcome and actual cost of the treatment were followed during 12 months. RESULTS: After 3 months of therapy, hemoglobin rose above low normal range in 2 patients. After 6 months, 3 patients had platelet count above 100x10(9)/L, and bone pain crises completely disappeared in patients with severe bone involvement. After 12 months, normal blood counts were restored in all patients. At the same time point, bone destruction remained unchanged in 3 patients and showed marked improvement in one. In agreement with the Ministry of Health, the Croatian Institute for Health Insurance restructured its funds and established a special "Fund for expensive drugs." This fund covers the treatment costs for patients with Gaucher disease (approximately 150,000 per patient per year) as well as the cost of treatment for patients with Fabry disease, AIDS, adenosine deaminase deficiency, multiple sclerosis, chronic myeloid leukemia, juvenile arthritis, and ovarian cancer. CONCLUSION: Collaboration of the institutions in a post-communist transition health care system can provide an effective model for financing expensive treatment for patients with rare diseases in a resource-poor health system.

Enzyme replacement therapy for Gaucher's disease: the early Canadian experience.

BACKGROUND: The management of severe Gaucher's disease was dramatically improved by the development of enzyme replacement therapy. However, this treatment is very costly (currently about $21,000 per infusion for adults at the starting dose recommended by the manufacturer). The goal of this study was to determine how enzyme replacement therapy was being prescribed and financially supported in various parts of Canada. In addition, demographic and outcome information was elicited. METHODS: Prescribing physicians were identified through professional associations and with the help of the manufacturer of the enzyme preparations used for the treatment of Gaucher's disease. The physicians were surveyed by questionnaire in July 1995. The study included all patients in Canada who had received enzyme replacement therapy for Gaucher's disease before July 1, 1995. RESULTS: A total of 25 patients (15 children and 10 adults) with type 1 Gaucher's disease, the common nonneuronopathic variant of the disease, were receiving enzyme replacement therapy by the end of 1995. The indications for treatment included massive splenomegaly, growth failure, and severe bony, hematologic and pulmonary complications of the disease; no patients with mild disease were receiving treatment. Treatment regimens varied markedly (from 12 to 160 units of enzyme/kg per month). All the patients were reported to have responded well to therapy, based on serial measurements of hematologic indices, liver and spleen volumes, and numbers of bony crises as well as patients' subjective impressions. Financial support for therapy varied markedly from one province to another. None of the reporting physicians was aware of any patients with severe Gaucher's disease who were denied therapy as a result of inability to pay for the medication. Various agencies provided financial support for therapy, including both federal and provincial governments, private insurance carriers and the commercial supplier of the enzyme. In Ontario provincial health care officials accepted the development, by a multidisciplinary panel of medical experts, of formal guidelines for determining eligibility, on the basis of objective medical criteria, for reimbursement for enzyme replacement treatment. INTERPRETATION: Although some differences were found across the country with respect to the details of treatment, the indications for enzyme replacement therapy and the selection of severely affected patients were similar in the various provinces. However, financial support was inconsistent and varied among provinces and patients. This will prove to be a challenge in future, not only with respect to this disease but also for other diseases for which effective, expensive therapy has been developed.

The impact of Gaucher disease and its treatment on quality of life.

To obtain information about how Gaucher disease and its treatment, specifically enzyme replacement therapy, affect patients' health-related quality of life (HRQoL), we interviewed 16 patients with type I Gaucher disease (range 8-67 years). All but three patients had been receiving enzyme replacement therapy for at least 6 months. The quality of life factors examined for these patients included physical health, social life, emotional health, financial burden, future plans and satisfaction with health care. The results indicated that bone pain and chronic fatigue interfered with school, job and social activities and were the most debilitating symptoms of Gaucher disease. Most patients experienced a significant increase in energy level from therapy and reported significant improvements in quality of life. Most patients did not perceive an effect of Gaucher disease on their overall emotional health, but some patients expressed anxieties about the discomfort, inconvenience and high costs of therapy. We conclude that a measure of HRQoL for Gaucher patients should include a generic core of items supplemented by disease-specific items designed to assess the changes in symptoms and in the occupational, recreational, social and emotional aspects of patients' lives that occur as a result of disease progression and/or management.

Gaucher disease, enzyme replacement therapy, and the Patient Assistance Program.

Gaucher disease is the most common lysosomal storage disorder characterized by a missing enzyme, glucocerebrosidase. Enzyme replacement therapy has been available in the form of Ceredase (Genzyme Corporation, Cambridge, Massachusetts) (alglucerase injection) since 1991, and in the form Cerezyme (Genzyme Corporation, Cambridge, Massachusetts) (imiglucerase for injection) since 1994. Because of the high cost associated with enzyme replacement therapy, the Genzyme Corporation, manufacturers of Ceredase and Cerezyme, developed the Patient Assistance Program. The program assisted those patients who chose to use it with the facilitation of coverage approvals from their insurance carriers. The program has become a comprehensive case management service made up of nurses and social workers who work with patients on many issues from access to coverage. Case managers also provide support to providers who are transitioning patients to home therapy. Home health agencies can benefit from the information and assistance offered by this program as well as other resources throughout Genzyme and the Gaucher community.

Gaucher disease. Current issues in diagnosis and treatment. NIH Technology Assessment Panel on Gaucher Disease.

OBJECTIVE: To provide physicians with a responsible assessment of the diagnosis and treatment of Gaucher disease. PARTICIPANTS: A nonfederal, nonadvocate, 14-member panel representing the fields of pediatrics, obstetrics and gynecology, genetics, endocrinology, molecular biology, internal medicine, and biostatistics. In addition, 30 experts in genetics, pediatrics, neurology, obstetrics and gynecology, orthopedics, hematology, genetic counseling, clinical pathology, and epidemiology presented data to the panel and a conference audience of 230 during a 1 1/2 public session. Questions and statements from conference attendees were considered during the open session. Closed deliberations by the panel occurred during the remainder of the second day and the morning of the third. EVIDENCE: The literature was searched through MEDLINE, and an extensive bibliography of references was provided to the panel and the conference audience. Experts prepared abstracts with relevant citations from the literature. Scientific evidence was given precedence over clinical anecdotal experience. CONSENSUS PROCESS: The panel, answering predefined questions, developed their conclusions based on the scientific evidence presented in open forum and on the scientific literature. The panel composed a draft statement that was read in its entirety and circulated to the experts and the audience for comment. Thereafter, the panel resolved conflicting recommendations and released a revised statement at the end of the conference. The panel finalized the revisions within a few weeks after the conference. CONCLUSIONS: Despite the success of enzyme therapy, treatment is limited by the cost of the agent. This makes it imperative to determine the lowest effective initial and maintenance doses, to define the appropriate clinical indications for treatment, and to establish uniform methods for optimize outcome assessment. The value of treatment for asymptomatic individuals has not been determined. General population screening for affected individuals and for carriers is not appropriate at this time. As a prototype for all rare diseases, the plight of patients with Gaucher disease raises difficult financial and ethical issues, which we as a society must address.