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Fleseriu M, Zhang Z, Hanman K, Haria K, Houchard A, Khawaja S, Ribeiro-Oliveira A, Gadelha M. A systematic literature review to evaluate extended dosing intervals in the pharmacological management of acromegaly. Pituitary 2023; 26:9-41. [PMID: 36447058 PMCID: PMC9708130 DOI: 10.1007/s11102-022-01285-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/14/2022] [Indexed: 12/05/2022]
Abstract
PURPOSE This systematic literature review investigated whether extended dosing intervals (EDIs) of pharmacological acromegaly treatments reduce patient burden and costs compared with standard dosing, while maintaining effectiveness. METHODS MEDLINE/Embase/the Cochrane Library (2001-June 2021) and key congresses (2018-2021) were searched and identified systematic literature review bibliographies reviewed. Included publications reported on efficacy/effectiveness, safety and tolerability, health-related quality of life (HRQoL), and patient-reported and economic outcomes in longitudinal/cross-sectional studies in adults with acromegaly. Interventions included EDIs of pegvisomant, cabergoline, and somatostatin receptor ligands (SRLs): lanreotide autogel/depot (LAN), octreotide long-acting release (OCT), pasireotide long-acting release (PAS), and oral octreotide; no comparator was required. RESULTS In total, 35 publications reported on 27 studies: 3 pegvisomant monotherapy, 11 pegvisomant combination therapy with SRLs, 9 LAN, and 4 OCT; no studies reported on cabergoline, PAS, or oral octreotide at EDIs. Maintenance of normal insulin-like growth factor I (IGF-I) was observed in ≥ 70% of patients with LAN (1 study), OCT (1 study), and pegvisomant monotherapy (1 study). Achievement of normal IGF-I was observed in ≥ 70% of patients with LAN (3 studies) and pegvisomant in combination with SRLs (4 studies). Safety profiles were similar across EDI and standard regimens. Patients preferred and were satisfied with EDIs. HRQoL was maintained and cost savings were provided with EDIs versus standard regimens. CONCLUSIONS Clinical efficacy/effectiveness, safety, and HRQoL outcomes in adults with acromegaly were similar and costs lower with EDIs versus standard regimens. Physicians may consider acromegaly treatment at EDIs, especially for patients with good disease control.
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Affiliation(s)
- M Fleseriu
- Pituitary Center at Oregon Health & Science University, Portland, OR, USA.
| | - Z Zhang
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | | | - K Haria
- Costello Medical, London, UK
| | - A Houchard
- Ipsen Pharma, Boulogne-Billancourt, France
| | - S Khawaja
- World Alliance of Pituitary Organizations, Zeeland, The Netherlands
| | | | - M Gadelha
- Neuroendocrinology Research Center/Endocrinology Division, Medical School and Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Malaysian Consensus Statement for the Diagnosis and Management of Acromegaly. J ASEAN Fed Endocr Soc 2019; 34:8-14. [PMID: 33442131 PMCID: PMC7784186 DOI: 10.15605/jafes.034.01.03] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 05/14/2019] [Indexed: 12/17/2022] Open
Abstract
In Malaysia, acromegaly is under-recognised with only 10-15% of the expected number of cases from prevalence estimates, having been diagnosed and managed in established endocrine centres with access to multidisciplinary care. This is mainly due to lack of awareness and standardised approach in diagnosing this disease resulting in delay in diagnosis and management with suboptimal treatment outcomes. This first Malaysian consensus statement on the diagnosis and management of acromegaly addresses these issues and is based on current best practices and latest available evidence so as to reduce the disease burden on acromegaly patients managed in the Malaysian healthcare system.
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Öberg K, Lamberts SWJ. Somatostatin analogues in acromegaly and gastroenteropancreatic neuroendocrine tumours: past, present and future. Endocr Relat Cancer 2016; 23:R551-R566. [PMID: 27697899 DOI: 10.1530/erc-16-0151] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/03/2016] [Indexed: 11/08/2022]
Abstract
Acromegaly is a hormonal disorder that arises when the pituitary gland secretes excess growth hormone (GH), which in turn stimulates a concomitant increase in serum insulin-like growth factor 1 (IGF-1) levels. Gastroenteropancreatic neuroendocrine tumours (GEP-NET) constitute a heterogeneous group of tumours that can secrete serotonin and a variety of peptide hormones that may cause characteristic symptoms known as carcinoid syndrome or other symptoms and hormonal hypersecretion syndromes depending on the tumour's site of origin. Current medical therapy for the treatment of acromegaly and GEP-NET involves the administration of somatostatin analogues that effectively suppress excess hormone secretion. After its discovery in 1979, octreotide became the first synthetic biologically stable somatostatin analogue with a short-acting formulation of octreotide introduced into clinical practice in the late 1980s. Lanreotide, another somatostatin analogue, became available in the mid-1990s initially as a prolonged-release formulation administered every 10 or 14 days. Long-acting release formulations of both octreotide (Sandostatin LAR and Novartis) and lanreotide (Somatuline Autogel, Ipsen), based on microparticle and nanoparticle drug-delivery technologies, respectively, were later developed, which allowed for once-monthly administration and improved convenience. First-generation somatostatin analogues remain one of the cornerstones of medical therapy in the management of pituitary and GEP-NET hormone hypersecretion, with octreotide having the longest established efficacy and safety profile of the somatostatin analogue class. More recently, pasireotide (Signifor), a next-generation multireceptor-targeted somatostatin analogue, has emerged as an alternative therapeutic option for the treatment of acromegaly. This review summarizes the development and clinical success of somatostatin analogues.
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Pokuri VK, Fong MK, Iyer R. Octreotide and Lanreotide in Gastroenteropancreatic Neuroendocrine Tumors. Curr Oncol Rep 2016; 18:7. [PMID: 26743514 DOI: 10.1007/s11912-015-0492-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neuroendocrine tumors are heterogeneous, rare malignancies that arise most commonly in the gastrointestinal tract and pancreas. They often secrete vasoactive substances resulting in carcinoid syndrome and the tumor cells exclusively express somatostatin receptors. Octreotide and lanreotide are the two synthetic somatostatin analogs used for the control of carcinoid symptoms and tumor progression in advanced inoperable disease. Recent pivotal trials (PROMID and CLARINET studies) established their antitumor activity. We discuss the available data to support their use as symptom controlling and antiproliferative agents. This article also reviews the guidelines (National Comprehensive Cancer Network and North American Neuro Endocrine Tumor Society), cost-analysis (suggesting the cost-effectiveness of lanreotide autogel compared to higher doses of octreotide long acting release formulation in refractory patients), and future directions of somatostatin analogs in the management of patients refractory to conventional doses of octreotide and lanreotide.
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Affiliation(s)
- Venkata K Pokuri
- Department of Medical Oncology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Mei Ka Fong
- Department of Pharmacy, Carolinas Healthcare System, Levine Cancer Institute, Charlotte, NC, USA
| | - Renuka Iyer
- Department of Medical Oncology, Roswell Park Cancer Institute, Buffalo, NY, USA.
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Neggers SJCMM, Pronin V, Balcere I, Lee MK, Rozhinskaya L, Bronstein MD, Gadelha MR, Maisonobe P, Sert C, van der Lely AJ. Lanreotide Autogel 120 mg at extended dosing intervals in patients with acromegaly biochemically controlled with octreotide LAR: the LEAD study. Eur J Endocrinol 2015; 173:313-23. [PMID: 26047625 PMCID: PMC4544680 DOI: 10.1530/eje-15-0215] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/05/2015] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To evaluate extended dosing intervals (EDIs) with lanreotide Autogel 120 mg in patients with acromegaly previously biochemically controlled with octreotide LAR 10 or 20 mg. DESIGN AND METHODS Patients with acromegaly had received octreotide LAR 10 or 20 mg/4 weeks for ≥ 6 months and had normal IGF1 levels. Lanreotide Autogel 120 mg was administered every 6 weeks for 24 weeks (phase 1); depending on week-24 IGF1 levels, treatment was then administered every 4, 6 or 8 weeks for a further 24 weeks (phase 2). Hormone levels, patient-reported outcomes and adverse events were assessed. PRIMARY ENDPOINT proportion of patients on 6- or 8-week EDIs with normal IGF1 levels at week 48 (study end). RESULTS 107/124 patients completed the study (15 withdrew from phase 1 and two from phase 2). Of 124 patients enrolled, 77.4% were allocated to 6- or 8-week EDIs in phase 2 and 75.8% (95% CI: 68.3-83.3) had normal IGF1 levels at week 48 with the EDI (primary analysis). A total of 88.7% (83.1-94.3) had normal IGF1 levels after 24 weeks with 6-weekly dosing. GH levels were ≤ 2.5 μg/l in > 90% of patients after 24 and 48 weeks. Patient preferences for lanreotide Autogel 120 mg every 4, 6 or 8 weeks over octreotide LAR every 4 weeks were high. CONCLUSIONS Patients with acromegaly achieving biochemical control with octreotide LAR 10 or 20 mg/4 weeks are possible candidates for lanreotide Autogel 120 mg EDIs. EDIs are effective and well received among such patients.
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Affiliation(s)
- Sebastian J C M M Neggers
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Vyacheslav Pronin
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Inga Balcere
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Moon-Kyu Lee
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Liudmila Rozhinskaya
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Marcello D Bronstein
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Mônica R Gadelha
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Pascal Maisonobe
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Caroline Sert
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
| | - Aart Jan van der Lely
- Department of EndocrinologyErasmus Medical Center, Rotterdam, NetherlandsDepartment of EndocrinologyI.M. Sechenov First Moscow State Medical University, Moscow, Russian FederationDepartment of EndocrinologyPauls Stradins Clinical University Hospital, Riga, LatviaDivision of Endocrinology and MetabolismSamsung Medical Center, Sungkyunkwan University, Seoul, Republic of KoreaDepartment of Neuroendocrinology and Bone DiseasesNational Endocrinology Research Centre, Moscow, Russian FederationNeuroendocrine UnitDivision of Endocrinology and Metabolism, Hospital das Clinicas, University of São Paulo Medical School, São Paulo, BrazilEndocrine SectionHospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, BrazilIpsen Boulogne-BillancourtFrance
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Espinosa-de-los-Monteros AL, Gonzalez B, Vargas G, Sosa E, Mercado M. Octreotide LAR treatment of acromegaly in "real life": long-term outcome at a tertiary care center. Pituitary 2015; 18:290-6. [PMID: 24781039 DOI: 10.1007/s11102-014-0570-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To report our day-to day experience with the long-term use of octreotide LAR in the treatment of acromegaly. PATIENTS AND METHODS Patients with acromegaly managed between 2003 and 2012 with octreotide LAR for a median of 27 months (interquartile ranges 12-60) and who had not received radiation therapy or concomitant treatment with cabergoline were retrospectively evaluated. Both primarily treated patients (n = 33) and patients who received octreotide after failed pituitary surgery (adjunctive treatment, n = 124) were included. Full biochemical response was defined as the achievement of a GH <2.5 ng/mL and an IGF-1 <1.2 times the upper limit of normal (× ULN); we also evaluated efficacy using a GH cut off of <1 ng/mL. RESULTS Over 60% of the patients achieved a GH of <2.5 ng/mL. The combined GH (<2.5 ng/mL) and IGF-1 (<1.2 × ULN) target was achieved by 35.5 and 33.6% of the patients treated primarily and adjunctively, respectively; these figures dropped to 22.6 and 23% when using a GH target of <1 ng/mL. All patients reported a significant improvement in acromegalic symptoms. Lower pretreatment GH and IGF-1 levels were both associated with a higher probability of achieving the composite biochemical target. CONCLUSION Currently recommended GH and IGF-1 targets are reached by <36% of patients treated with octreotide LAR in a day-to day practice context. Nevertheless, in most instances a clinical benefit and an improvement in biochemical markers can be clearly documented.
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Affiliation(s)
- Ana Laura Espinosa-de-los-Monteros
- Endocrinology Service, Experimental Endocrinology Unit, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Aritsóteles 68, Polanco, 11560, Mexico City, Mexico
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Melmed S, Popovic V, Bidlingmaier M, Mercado M, van der Lely AJ, Biermasz N, Bolanowski M, Coculescu M, Schopohl J, Racz K, Glaser B, Goth M, Greenman Y, Trainer P, Mezosi E, Shimon I, Giustina A, Korbonits M, Bronstein MD, Kleinberg D, Teichman S, Gliko-Kabir I, Mamluk R, Haviv A, Strasburger C. Safety and efficacy of oral octreotide in acromegaly: results of a multicenter phase III trial. J Clin Endocrinol Metab 2015; 100:1699-708. [PMID: 25664604 DOI: 10.1210/jc.2014-4113] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND A novel oral octreotide formulation was tested for efficacy and safety in a phase III, multicenter, open-label, dose-titration, baseline-controlled study in patients with acromegaly. METHODS We enrolled 155 complete or partially controlled patients (IGF-1 <1.3 × upper limit of normal [ULN], and 2-h integrated GH <2.5 ng/mL) receiving injectable somatostatin receptor ligand (SRL) for ≥ 3 months. Subjects were switched to 40 mg/d oral octreotide capsules (OOCs), and the dose escalated to 60 and then up to 80 mg/d to control IGF-1. Subsequent fixed doses were maintained for a 7-month core treatment, followed by a voluntary 6-month extension. RESULTS Of 151 evaluable subjects initiating OOCs, 65% maintained response and achieved the primary endpoint of IGF-1 <1.3 × ULN and mean integrated GH <2.5 ng/mL at the end of the core treatment period and 62% at the end of treatment (up to 13 mo). The effect was durable, and 85 % of subjects initially controlled on OOCs maintained this response up to 13 months. When controlled on OOCs, GH levels were reduced compared to baseline, and acromegaly-related symptoms improved. Of 102 subjects completing the core treatment, 86% elected to enroll in the 6-month extension. Twenty-six subjects who were considered treatment failures (IGF-1 ≥ 1.3 × ULN) terminated early, and 23 withdrew for adverse events, consistent with those known for octreotide or disease related. CONCLUSIONS OOC, an oral therapeutic peptide, achieves efficacy in controlling IGF-1 and GH after switching from injectable SRLs for up to 13 months, with a safety profile consistent with approved SRLs. OOC appears to be effective and safe as an acromegaly monotherapy.
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Affiliation(s)
- Shlomo Melmed
- Cedars-Sinai Medical Center (S.M.), Los Angeles, California 90048; Clinical Center of Serbia (V.P.), Belgrade 11080, Serbia; Medizinische Klinik IV (M.Bi., J.S.), LMU, Munich 80336, Germany; ABC Medical Center (M.M.), Mexico City 00-16, Mexico; Erasmus Medical Center (A.J.V.D.L.), Rotterdam 3000, The Netherlands; Leiden University Medical Center (N.B.), Leiden 2333 ZA, The Netherlands; Wroclaw Medical University (M.Bo.), Wroclaw 50-345, Poland; National Institute of Endocrinology (M.C.), Bucharest 11420, Romania; Semmelweis University (K.R.), Budapest 1085, Hungary; Hadassah-Hebrew University Medical Center (B.G.), Jerusalem 9112001, Israel; Health Center (M.G.), Hungarian Defense Forces, Budapest 1134, Hungary; Sourasky Medical Center (Y.G.), Tel Aviv 64239, Israel; The Christie Hospital (P.T.), Manchester M20 4BX, United Kingdom; University of Pecs (E.M.), Pecs 7600, Hungary; Rabin Medical Center (I.S.), Petah-Tikva 4941492, Israel; University of Brescia (A.G.), Brescia 25100, Italy; Queen Mary University of London (M.K.), London E1 4NS, United Kingdom; Sao Paulo University (M.D.B.), Sao Paulo 03071-000, Brazil; New York University Langone Medical Center (D.K.), New York, New York 10016; Chiasma (S.T., I.G.-K., R.M., A.H.), Newton, Massachusetts 02459; and Charite Universitätsmedizin (C.S.), Berlin 10098, Germany
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Mercado M. Somatostatin analog withdrawal in patients with acromegaly: an elusive goal? Endocrine 2014; 46:368-9. [PMID: 24736999 DOI: 10.1007/s12020-014-0262-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 03/29/2014] [Indexed: 02/08/2023]
Affiliation(s)
- Moisés Mercado
- Experimental Endocrinology Unit, Hospital de Especialidades, Centro Médico Nacional, Siglo XXI, IMSS, Aristóteles 68, Polanco, 11560, Mexico City, Mexico,
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Adelman DT, Burgess A, Davies PR. Evaluation of long-acting somatostatin analog injection devices by nurses: a quantitative study. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2012; 5:103-9. [PMID: 23293542 PMCID: PMC3534535 DOI: 10.2147/mder.s37831] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The somatostatin analogs (SSAs) lanreotide Autogel/Depot and octreotide long-acting release are used to treat acromegaly and neuroendocrine tumors. The present study evaluated opinions on SSA injection devices, including a recently approved lanreotide new device (lanreotide-ND), among nurses in Europe and the USA. Nurses injecting SSAs for at least three patients per year (n = 77) were interviewed regarding SSA devices. Device attributes were rated via questionnaire; nurses were then timed administering test injections with lanreotide-ND and octreotide long-acting release. The most important delivery system attributes were easy/convenient preparation and injection (ranked in the top five by 70% of nurses), low clogging risk (58%), and high product efficacy (55%). Compared with the octreotide long-acting release device, lanreotide-ND scored higher on 15/16 attributes, had shorter mean preparation and administration time (329 versus 66 seconds, respectively; P ≤ 0.01) and a higher overall preference score (70 versus 114, respectively; P ≤ 0.01). The five most important lanreotide-ND attributes were: prefilled device, confidence a full dose was delivered, low clogging risk, easy/convenient preparation and injection, and fast administration. These device features could lead to improvements in clinical practice and benefit patients/caregivers who administer SSAs at home.
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Affiliation(s)
- Daphne T Adelman
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Cozzi R, Attanasio R. Octreotide long-acting repeatable for acromegaly. Expert Rev Clin Pharmacol 2012; 5:125-43. [PMID: 22390555 DOI: 10.1586/ecp.12.4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Acromegaly remains a therapeutic challenge for the endocrinologist. Among the available therapeutic options, octreotide long-acting repeatable (Sandostatin(®) LAR(®), Novartis) plays a chief role, both as a primary therapy and as an adjuvant treatment after unsuccessful surgery. A plethora of papers and a meta-analysis have demonstrated its efficacy in: control of clinical picture; achievement of safe growth hormone and normal age-matched IGF-I levels (both factors associated with restoration of normal life expectancy) in 60-70% of patients; control of tumor volume (with real shrinkage in over half of cases); and halt or reversal of most acromegaly-associated comorbidities. Treatment is well tolerated in most patients and can be safely prolonged for many years if required.
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Affiliation(s)
- Renato Cozzi
- Division of Endocrinology, Ospedale Niguarda, Via Canonica 81, I-20154 Milan, Italy.
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Li ZQ, Quan Z, Tian HL, Cheng M. Preoperative Lanreotide Treatment Improves Outcome in Patients with Acromegaly Resulting from Invasive Pituitary Macroadenoma. J Int Med Res 2012; 40:517-24. [PMID: 22613412 DOI: 10.1177/147323001204000213] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE: To investigate whether 3 months' preoperative treatment with lanreotide improved outcome in newly diagnosed patients with acromegaly resulting from invasive pituitary macroadenoma. METHODS: After baseline evaluation, untreated patients were randomized to undergo direct trans-sphenoidal surgery or lanreotide treatment (30 mg via intramuscular injection every 2 weeks, increased to 30 mg/week at week 8 if growth hormone nadir > 2.5 μg/l), for 3 months prior to surgery. Tumour shrinkage following lanreotide treatment was analysed. Cure was evaluated at 3 months postsurgery by measuring growth hormone and insulinlike growth factor-1 (IGF-1) levels. RESULTS: Preoperative lanreotide treatment significantly reduced mean tumour size. Growth hormone and IGF-1 levels were lower in the pretreatment group than in the direct surgery group at 3 months postsurgery. According to combined growth hormone and IGF-1 levels, significantly more patients were cured by trans-sphenoidal surgery in the pretreatment group compared with the direct surgery group (11 of 24 and five of 25 patients, respectively). CONCLUSIONS: Lanreotide treatment for 3 months before trans-sphenoidal surgery effectively reduced tumour size, and improved surgical cure rate, in newly diagnosed patients with acromegaly resulting from invasive pituitary macroadenoma.
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Affiliation(s)
- Z-Q Li
- Department of Neurosurgery, Fengxian Branch of Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Neurological Research Institute of Anhui University of Science and Technology, Shanghai, China
| | - Z Quan
- Department of Neurosurgery, Fengxian Branch of Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Neurological Research Institute of Anhui University of Science and Technology, Shanghai, China
| | - H-L Tian
- Department of Neurosurgery, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - M Cheng
- Department of Radiography, Fengxian Branch of Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Ramírez C, Vargas G, González B, Grossman A, Rábago J, Sosa E, Espinosa-de-Los-Monteros AL, Mercado M. Discontinuation of octreotide LAR after long term, successful treatment of patients with acromegaly: is it worth trying? Eur J Endocrinol 2012; 166:21-6. [PMID: 21993154 DOI: 10.1530/eje-11-0738] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Somatostatin analogs (SA) have been used for over 25 years in the treatment of acromegaly. A major disadvantage is the need to continue therapy indefinitely. OBJECTIVE To evaluate the feasibility of discontinuing therapy in well-controlled patients with acromegaly treated chronically with SA. DESIGN AND METHODS Of the 205 subjects on octreotide LAR, we selected those who met the following criteria: two or more years of treatment, a stable dose and injection interval of 20 mg every 8 weeks or longer for the previous year, no history of radiation, no cabergoline for the previous 6 months, a GH <1.5 ng/ml, and an IGF1 <1.2×upper limit of normal (ULN). Octreotide LAR was stopped and both GH and IGF1 were measured monthly for 4 months; a glucose-suppressed GH value and magnetic resonance imaging were obtained at the 4th month, thereafter, basal GH and IGF1 were measured q. 3 months, for 12-18 months. Patients were removed from the study if GH or IGF1 rose to 1.5 ng/ml or 1.2×ULN respectively. RESULTS Twelve patients (ten women, mean age 48±13 years) were studied. Seven patients (58.3%) relapsed biochemically within 1 year of having stopped the SA; two patients relapsed by GH and IGF1 criteria, the remaining five patients kept GH levels within target. Five patients (41.7%) remain in remission after 12 months of follow-up. Non-recurring patients were on longer injection intervals but no other characteristic was associated with a successful withdrawal. CONCLUSION Withdrawal of SA is possible in a small but distinct subset of patients, particularly in those who are very well controlled on relatively low doses administered at long intervals.
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Affiliation(s)
- Claudia Ramírez
- Endocrinology Service and Experimental Endocrinology Unit, Hospital de Especialidades, CMN S.XXI, IMSS, Aristoteles 68, Polanco 11560, Mexico City, Mexico
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13
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Ludlam WH, Anthony L. Safety review: dose optimization of somatostatin analogs in patients with acromegaly and neuroendocrine tumors. Adv Ther 2011; 28:825-41. [PMID: 21964965 DOI: 10.1007/s12325-011-0062-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Patients with either acromegaly or neuroendocrine tumors (NET) can be treated with somatostatin analogs to relieve symptoms and improve disease control. However, there is an absence of large clinical trials specifically designed to document the safety when increases in somatostatin analog dosing are needed in patients who do not achieve their treatment goals. To fully explore and communicate any potential risks, we conducted a literature review and present a summary of the studies documenting the safety and tolerability of dose optimization with somatostatin analogs in patients with acromegaly and NET. METHODS A literature search was undertaken to find clinical studies specifically reporting the effects of dose titration using the depot formulations of the somatostatin analogs, octreotide long-acting repeatable (LAR) or lanreotide, in patients with acromegaly and NET. RESULTS Publications that described the treatment and management of patients with acromegaly and NET were reviewed. The rationale for dose optimization, including high-dose treatment in patients who are inadequately controlled on conventional doses and the safety and tolerability of somatostatin analogs, is discussed. CONCLUSION A review of published clinical studies demonstrates that dose optimization provides additional biochemical control in patients with acromegaly and NET who are inadequately controlled with conventional starting doses of octreotide LAR and lanreotide ATG. The benefits of dose optimization include improved efficacy without a significant change in the recorded adverse events and the tolerability of the treatment. Therefore, patient response to treatment should be routinely monitored and their somatostatin analog dose increased or decreased thereafter according to their individual response.
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Affiliation(s)
- William H Ludlam
- Seattle Pituitary Center, Swedish Neuroscience Institute, Seattle, WA, USA
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14
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Fleseriu M, Delashaw JB, Cook DM. Acromegaly: a review of current medical therapy and new drugs on the horizon. Neurosurg Focus 2010; 29:E15. [PMID: 20887125 DOI: 10.3171/2010.7.focus10154] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Acromegaly is a disease that results from a growth hormone (GH)–secreting pituitary tumor. Clinically, the disease is characterized by excessive skeletal growth, soft tissue enlargement with disfigurement, and increased risk of cardiovascular death. The goals of treatment are the removal or reduction of the tumor mass via surgery and normalization of GH secretion. Another treatment goal is the preservation of normal pituitary function if possible. Transsphenoidal surgery by an experienced neurosurgeon is usually the first line of therapy, especially for small tumors. Surgeon expertise is crucial for outcome, with dedicated pituitary surgeons having better results. However, overall cure rates remain low because patients with these tumors usually present at an incurable stage. Therefore, medical therapy to control excess GH secretion plays a significant role in a large proportion of patients with acromegaly who are not cured by surgery or other forms of therapy, such as radiotherapy, and/or are awaiting the effects of radiotherapy. If surgery is not curative, lifelong monitoring and the control of excess GH is usually necessary by a care team experienced in handling this chronic disease. In the past decade major progress has occurred in the development of highly specific and selective pharmacological agents that have greatly facilitated more aggressive management of active acromegaly. Treatment approach should be individualized and take into consideration a patient's tumor size and location, symptoms, comorbid conditions, and preferences. Because a surgical cure can be difficult to achieve, all patients, even those with what seems to be a clinically and biochemically inactive disease, should undergo long-term biochemical testing and pituitary MR imaging.
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Affiliation(s)
- Maria Fleseriu
- Department of Neurological Surgery, Division of Endocrinology, Diabetes, and Clinical Nutrition, and Northwest Pituitary Center, Oregon Health & Science University, Portland, Oregon 97239, USA.
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Klibanski A, Melmed S, Clemmons DR, Colao A, Cunningham RS, Molitch ME, Vinik AI, Adelman DT, Liebert KJP. The endocrine tumor summit 2008: appraising therapeutic approaches for acromegaly and carcinoid syndrome. Pituitary 2010; 13:266-86. [PMID: 20012914 PMCID: PMC2913001 DOI: 10.1007/s11102-009-0210-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The Endocrine Tumor Summit convened in December 2008 to address 6 statements prepared by panel members that reflect important questions in the treatment of acromegaly and carcinoid syndrome. Data pertinent to each of the statements were identified through review of pertinent literature by one of the 9-member panel, enabling a critical evaluation of the statements and the evidence supporting or refuting them. Three statements addressed the validity of serum growth hormone (GH) and insulin-like growth factor-I (IGF-I) concentrations as indicators or predictors of disease in acromegaly. Statements regarding the effects of preoperative somatostatin analog use on pituitary surgical outcomes, their effects on hormone and symptom control in carcinoid syndrome, and the efficacy of extended dosing intervals were reviewed. Panel opinions, based on the level of available scientific evidence, were polled. Finally, their views were compared with those of surveyed community-based endocrinologists and neurosurgeons.
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Affiliation(s)
- Anne Klibanski
- Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114 USA
| | - Shlomo Melmed
- Cedars-Sinai Medical Center, Academic Affairs, Room #2015, 8700 Beverly Boulevard, Los Angles, CA 90048 USA
| | - David R. Clemmons
- University of North Carolina School of Medicine, 8024 Burnette Womack, CB 7170, Bowles Building, Chapel Hill, NC 27599-7170 USA
| | - Annamaria Colao
- Department of Molecular and Clinical Endocrinology and Oncology, University Federico II of Naples, Via S. Pansini 5, Naples, 80131 Italy
| | - Regina S. Cunningham
- The Cancer Institute of New Jersey, Robert Wood Johnson Medical Center, 195 Little Albany Street, New Brunswick, NJ 08903-2681 USA
| | - Mark E. Molitch
- Northwestern University Feinberg School of Medicine, 645 N. Michigan Avenue Suite 530, Chicago, IL 60611 USA
| | - Aaron I. Vinik
- Department of Internal Medicine, Eastern Virginia Medical School, Strelitz Diabetes Center, 855 West Brambleton Ave., Norfolk, VA 23510 USA
| | - Daphne T. Adelman
- Northwestern University Feinberg School of Medicine, 645 N. Michigan Avenue Suite 530, Chicago, IL 60611 USA
| | - Karen J. P. Liebert
- Neuroendocrine Unit, Massachusetts General Hospital, Bulfinch 457 B, 55 Fruit Street, Boston, MA 02114 USA
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16
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Debono M, Newell-Price J. New formulations and approaches in the medical treatment of acromegaly. Curr Opin Endocrinol Diabetes Obes 2010; 17:350-5. [PMID: 20502324 DOI: 10.1097/med.0b013e32833ab099] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To discuss novel drug formulations being developed for the medical treatment of acromegaly and to highlight recent data from studies reporting more effective therapeutic strategies using existing drugs. RECENT FINDINGS Despite advances in the management of acromegaly a significant number of patients remain uncontrolled. Primary medical treatment is being increasingly considered, but use of somatostatin analogues, the current mainstay of medical therapy, achieves control in only around 60% of patients, whilst 10-20% may be controlled with dopamine agonists. Consequently, improvements in drug efficacy and convenience are needed. Newer longer-acting somatostatin analogues are in development and combination regimes with the growth hormone receptor antagonist, pegvisomant, given at more cost-effective weekly doses show promising results. Somatostatin analogue-resistant tumours may respond to ligands with higher affinities to other receptors, such as pasireotide (SOM 230). Further, the combined dopamine/somatostatin receptor analogue BIM-23A760 has increased affinity to somatostatin receptors 2 and 5 and to the dopamine 2 receptor, and phase 2 clinical studies are underway. SUMMARY These novel drugs, formulations and treatment regimes should potentially add to the armamentarium of treatment options for patients with acromegaly.
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Affiliation(s)
- Miguel Debono
- Academic Unit of Endocrinology, Department of Human Metabolism, University of Sheffield, Beech Hill Road, Sheffield, UK
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17
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Barkan A, Bronstein MD, Bruno OD, Cob A, Espinosa-de-los-Monteros AL, Gadelha MR, Garavito G, Guitelman M, Mangupli R, Mercado M, Portocarrero L, Sheppard M. Management of acromegaly in Latin America: expert panel recommendations. Pituitary 2010; 13:168-75. [PMID: 19882249 PMCID: PMC2855858 DOI: 10.1007/s11102-009-0206-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Although there are international guidelines orienting physicians on how to manage patients with acromegaly, such guidelines should be adapted for use in distinct regions of the world. A panel of neuroendocrinologists convened in Mexico City in August of 2007 to discuss specific considerations in Latin America. Of major discussion was the laboratory evaluation of acromegaly, which requires the use of appropriate tests and the adoption of local institutional standards. As a general rule to ensure diagnosis, the patient's GH level during an oral glucose tolerance test and IGF-1 level should be evaluated. Furthermore, to guide treatment decisions, both GH and IGF-1 assessments are required. The treatment of patients with acromegaly in Latin America is influenced by local issues of cost, availability and expertise of pituitary neurosurgeons, which should dictate therapeutic choices. Such treatment has undergone profound changes because of the introduction of effective medical interventions that may be used after surgical debulking or as first-line medical therapy in selected cases. Surgical resection remains the mainstay of therapy for small pituitary adenomas (microadenomas), potentially resectable macroadenomas and invasive adenomas causing visual defects. Radiotherapy may be indicated in selected cases when no disease control is achieved despite optimal surgical debulking and medical therapy, when there is no access to somatostatin analogues, or when local issues of cost preclude other therapies. Since not all the diagnostic tools and treatment options are available in all Latin American countries, physicians need to adapt their clinical management decisions to the available local resources and therapeutic options.
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Affiliation(s)
| | | | - Oscar D. Bruno
- Hospital de Clínicas José de San Martín, UBA, Buenos Aires, Argentina
| | | | - Ana Laura Espinosa-de-los-Monteros
- Endocrinology Unit, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, del Instituto Mexicano del Seguro Social (IMSS), Aristóteles # 68, Col. Polanco, CP 115560 Mexico City, Mexico
| | | | | | - Mirtha Guitelman
- División Endocrinología, Hospital General de Agudos Carlos G. Durand, Buenos Aires, Argentina
| | | | - Moisés Mercado
- Endocrinology Unit, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, del Instituto Mexicano del Seguro Social (IMSS), Aristóteles # 68, Col. Polanco, CP 115560 Mexico City, Mexico
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18
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Bornschein J, Drozdov I, Malfertheiner P. Octreotide LAR: safety and tolerability issues. Expert Opin Drug Saf 2010; 8:755-68. [PMID: 19998528 DOI: 10.1517/14740330903379525] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Somatostatin analogues are the cornerstone in therapy of acromegaly and functioning neuroendocrine tumors. Long-acting retard formulations have improved patient survival and contributed considerably to quality of life. The first such compound was octreotide LAR ('long-acting release'), characterized by high affinity to somatostatin receptor subtypes 2 and 5, which has to be injected intramuscularly every 4 weeks. OBJECTIVE The aim was to screen all octreotide LAR-related literature and assess the compound's profile for safety and tolerability. METHODS An extensive literature search has been performed using the MEDLINE database to retrieve data from clinical studies evaluating the efficacy and tolerability of octreotide LAR. RESULTS/CONCLUSION Octreotide LAR is well tolerated; however, diarrhea and gallstone formation were identified as the main adverse events. Impairment of glucose homeostasis was a regular phenomenon, but its occurrence was unpredictable. General side effects such as headache, abdominal discomfort or fatigue were also reported. According to incidental case reports, administration during pregnancy appears to be safe for both mother and child; however, definitive evidence is missing. In addition, octreotide LAR has been evaluated for further indications including treatment of solid tumor entities, due to its antiproliferative effect. Currently, several compounds (lanreotide, SOM230) with a broader receptor spectrum are under evaluation and may improve treatment efficacy and lower incidence of side effects.
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Affiliation(s)
- Jan Bornschein
- Otto-von-Guericke University of Magdeburg, Department of Gastroenterology, Hepatology and Infectious Diseases, Germany
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19
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Shen M, Shou X, Wang Y, Zhang Z, Wu J, Mao Y, Li S, Zhao Y. Effect of presurgical long-acting octreotide treatment in acromegaly patients with invasive pituitary macroadenomas: a prospective randomized study. Endocr J 2010; 57:1035-44. [PMID: 21099129 DOI: 10.1507/endocrj.k10e-203] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Therapeutic effects of presurgical long-acting octreotide treatment on tumor shrinkage, and short- and long-term postoperative GH and IGF-1 levels of acromegaly patients with invasive pituitary macroadenomas were investigated prospectively in Huashan Hospital, Shanghai, China. Thirty-nine untreated acromegaly patients, all with invasive pituitary macroadenomas, were randomly divided into two groups: experimental group (n=19), and control group (n=20). Patients in the experimental group received a three-month course of long-acting octreotide treatment before transsphenoidal surgery; the control group underwent surgery directly. Tumor shrinkage after drug treatment and short- and long-term postoperative GH and IGF-1 levels were analyzed in the two groups. Long-acting octreotide treatment reduced tumor size from 7893 ± 6450 to 4794 ± 4682 mm(3). Mean shrinkage rate was 37.4 ± 30.9%. GH and IGF-1 levels of the experimental group were lower than the control group at 3 months, 6 months after surgery, and after long-term follow-up. Remission rate (both GH and IGF-1 normal) of the experimental group was higher at 3 and 6 months follow-up, but exhibited no advantage in long-term follow-up. In the experimental group, the total resection rate was higher in patients whose Hardy-Knosp grading decreased to ≤ 2 than those whose Hardy-Knosp grading is still ≥ 3 after drug pretreatment. In conclusion, presurgical long-acting octreotide treatment effectively reduces tumor size and invasion, which helps enhance early remission rates of invasive macroadenomas by transsphenoidal surgery, but does not appear to improve the long-term cure rate.
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Affiliation(s)
- Ming Shen
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 20040, China
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20
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Feelders RA, Hofland LJ, van Aken MO, Neggers SJ, Lamberts SWJ, de Herder WW, van der Lely AJ. Medical therapy of acromegaly: efficacy and safety of somatostatin analogues. Drugs 2009; 69:2207-26. [PMID: 19852525 DOI: 10.2165/11318510-000000000-00000] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Acromegaly is a chronic disease with signs and symptoms due to growth hormone (GH) excess. The most frequent cause of acromegaly is a GH-producing pituitary adenoma. Chronic GH excess is accompanied by long-term complications of the locomotor (arthrosis) and cardiovascular (atherosclerosis, cardiomyopathy) systems and is, when untreated, associated with an increased mortality. The aim of treatment of acromegaly is to improve symptoms, to achieve local tumour mass control, and to decrease morbidity and mortality. Treatment options include surgery, medical therapy and radiotherapy. Transsphenoidal surgery is the first choice of treatment when a definitive cure can be achieved, particularly in the case of microadenomas and when decompression of surrounding structures (optic chiasm, ophthalmic motor nerves) is indicated. Primary medical therapy has been increasingly applied in recent years, especially when a priori chances of surgical cure are low (because of adenoma size and localization) and in patients with advanced age and/or serious co-morbidity. In addition, preoperative primary medical therapy may result in tumour shrinkage, facilitating tumour resection, and may reduce perioperative complications due to GH excess. Within the spectrum of medical therapy, long-acting somatostatin analogues (somatostatins) are considered as first-line treatment. Treatment with somatostatin analogues results in GH control in approximately 60% of patients. In addition, somatostatin analogues induce tumour shrinkage in 30-50% of patients, particularly when applied as primary therapy. Prolonged treatment with somatostatin analogues appears to be safe and is usually well tolerated. The currently available somatostatin analogues, octreotide and lanreotide, seem to be equally effective; however, this should still be evaluated in prospective, randomized trials evaluating efficacy with respect to GH control and tumour shrinkage. In patients with an insufficient clinical and biochemical response to somatostatin analogues, combination therapy with dopamine receptor agonists or the GH receptor antagonist pegvisomant usually leads to disease control. New developments in the medical therapy of acromegaly include the universal somatostatin receptor agonist pasireotide, which has a broader affinity for all somatostatin receptor (sst) subtypes compared with the currently available somatostatin analogues with preferential affinity for the sst2 receptor, and chimeric compounds that interact with both somatostatin and dopamine receptors with synergizing effects on GH secretion.
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Affiliation(s)
- Richard A Feelders
- Department of Internal Medicine, Section of Endocrinology, Erasmus Medical Center, Rotterdam, The Netherlands.
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21
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Abstract
BACKGROUND Acromegaly is characterized by overproduction of growth hormone (GH) by the pituitary gland. GH stimulates the synthesis of insulin-like growth factor-I (IGF-I), and the somatic growth and metabolic dysfunction that characterize acromegaly are a consequence of elevated GH and IGF-I levels. Gastroenteropancreatic neuroendocrine tumors (GEP-NETs) are rare, slow-growing neoplasms that have usually metastasized by the time of diagnosis. The majority of GEP-NETs are carcinoid tumors whose syndrome is caused by the hypersecretion of biogenic amines, peptides and polypeptides responsible for the principal symptoms of diarrhea and flushing. METHODS The MEDLINE and EMBASE databases were searched for preclinical and clinical studies of octreotide (Sandostatin* ), a potent synthetic somatostatin analogue, in patients with acromegaly or GEP-NETs. OBJECTIVE This article reviews the 20 years of clinical experience with octreotide and the impact it has made in patients with acromegaly or GEP-NETs. RESULTS Octreotide has proven to be an essential component in the management strategy of acromegaly and GEP-NETs over the past 20 years. The multiple beneficial effects of octreotide throughout the body, combined with its established safety profile (the most common adverse effects are injection-site pain and gastrointestinal events), have made it an appealing option for clinicians. The advent of the long-acting release (LAR) formulation of octreotide provided additional benefits to patients through monthly administration, while maintaining the efficacy and tolerability profile of the daily subcutaneous formulation. CONCLUSIONS Octreotide is a potent synthetic somatostatin analogue that has become the mainstay of medical therapy for tumor control in neuroendocrine disorders such as acromegaly and GEP-NETs. The development of octreotide LAR offered a further advancement; less frequent dosing provided valuable benefits in quality of life to patients, with equivalent efficacy and tolerability. Moreover, recent results from the PROMID study have confirmed the antiproliferative effect of octreotide LAR in patients with well-differentiated metastatic GEP-NETs of the midgut. New therapeutic uses of octreotide are currently under investigation in a variety of clinical settings.
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Biermasz NR, Roelfsema F, Pereira AM, Romijn JA. Cost-effectiveness of lanreotide Autogel in treatment algorithms of acromegaly. Expert Rev Pharmacoecon Outcomes Res 2009; 9:223-34. [PMID: 19527094 DOI: 10.1586/erp.09.17] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The introduction of effective pharmacological treatments has changed the management of acromegaly. However, chronic, life-long treatment with somatostatin analogues and/or growth hormone receptor antagonists is very expensive. We estimated the costs of treatment algorithms to control acromegaly from a Dutch perspective. We used the following assumptions: after the diagnosis of acromegaly there is a mean remaining lifespan of approximately 33 years; the success rates of surgery and somatostatin analogues in controlling the disease are approximately 60%; and the lifelong costs of different algorithms to control acromegaly in 100 patients ranged from 43 million euros (primary surgery and secondary somatostatin analogues) to 57 million euros (primary somatostatin analogues and secondary surgery) and even reached 95 million euros (medical treatment only). In algorithms that include trans-sphenoidal surgery, the lifetime treatment costs are almost 46-59% cheaper per 100 patients than in algorithms with medical treatment but without trans-sphenoidal surgery. Algorithms with primary surgery and secondary somatostatin analogs are 30% cheaper per 100 patients than algorithms with primary somatostatin analogues and secondary surgery. Per 100 patients, algorithms including lanreotide Autogel are 14-34% more expensive than algorithms including octreotide long-acting release. These life-long costs should be taken into consideration when making choices between treatment algorithms.
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Affiliation(s)
- Nienke R Biermasz
- Department of Endocrinology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands.
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23
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Abrams P, Alexopoulou O, Abs R, Maiter D, Verhelst J. Optimalization and cost management of lanreotide-Autogel therapy in acromegaly. Eur J Endocrinol 2007; 157:571-7. [PMID: 17984236 DOI: 10.1530/eje-07-0366] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Lanreotide-Autogel is a depot formulation of the somatostatin analog lanreotide used in the treatment of acromegaly. We investigated whether prolonging or shortening the interval between injections would offer any benefit. SUBJECTS AND METHODS The interval was prolonged from once every 4 weeks to once every 6 weeks when patients (n=9) had normal IGF-I and GH concentrations. When patients (n=12) had still elevated IGF-I or GH on the maximal dose of 120 mg every 4 weeks, the interval was shortened to once every 3 weeks. Serum IGF-I and GH were measured after 12 and 24 weeks to allow for dose adaptation. Symptoms and tumor volume were evaluated at baseline and after 36 weeks. RESULTS In seven of the nine subjects with normal IGF-I and GH, the interval could be extended to 6 weeks without loosing efficacy on IGF-I (195 vs 213 microg/l; not significant, NS) and GH concentrations (1.4 vs 1.3 microg/l; NS). The weekly dose could significantly be reduced (from 23.3 to 17.8 mg; P=0.002). In only 1 of the 12 not-controlled patients, reducing the interval to once every 3 weeks induced normalization of IGF-I and GH. CONCLUSION In subjects whose acromegaly is well controlled using lanreotide-Autogel, prolonging the time interval between injections can often be increased 4 to 6 weeks without loss of efficacy, thereby improving the subject's comfort and reducing the cost of treatment. On the other hand, in subjects whose acromegaly is not controlled on a dose of 120 mg every 4 weeks, reducing the interval to every 3 weeks is rarely beneficial.
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Affiliation(s)
- Pascale Abrams
- Department of Endocrinology, University Hospital of Antwerp, Wilrijkstraat 1, B-2650 Antwerp, Belgium.
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24
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Ronchi CL, Boschetti M, Degli Uberti EC, Mariotti S, Grottoli S, Loli P, Lombardi G, Tamburrano G, Arvigo M, Angeletti G, Boscani PF, Beck-Peccoz P, Arosio M. Efficacy of a slow-release formulation of lanreotide (Autogel) 120 mg) in patients with acromegaly previously treated with octreotide long acting release (LAR): an open, multicentre longitudinal study. Clin Endocrinol (Oxf) 2007; 67:512-9. [PMID: 17555511 DOI: 10.1111/j.1365-2265.2007.02917.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Lanreotide Autogel 120 mg (ATG120; Ipsen S.p.A, Milan, Italy) is a high-dose, sustained-release aqueous gel formulation, supplied in a prefilled syringe and given by deep subcutaneous injection. The aim of this study was to compare efficacy and tolerability of ATG120 given every 4-8 weeks with those of octreotide LAR (o-LAR) given every 4 weeks. DESIGN PATIENTS AND INTERVENTION: A phase III multicentre Italian open clinical study of 23 acromegalic patients (15 female, 8 male). All patients had received o-LAR for 6-18 months and, after 3 months wash out, ATG120 was given every 6 weeks for a total of four injections (Period 1). Then the interval between ATG120 injections was adjusted according to three different schemes: every 4, 6 or 8 weeks depending on GH levels (GH > 2.5 microg/l; 1 < GH <or= 2.5 microg/l; GH <or= 1 microg/l, respectively). ATG120 was given for a further two to three doses, with a final assessment (Period 2) at Week 34, 36 or 42. MEASUREMENTS Hormonal (GH and IGF-I) and clinical efficacy and tolerability. RESULTS ATG120 induced a significant GH decrease from 9.9 +/- 11.3 at baseline (Visit 1) to 3.5 +/- 5.7 at the end of Period 1 (P < 0.01) and to 3.8 +/- 5.7 microg/l at the final visit (P < 0.01). IGF-I also decreased from 544 +/- 312 at baseline (Visit 1) to 318 +/- 181 at Period 1 and to 356 +/- 187 microg/l at the final visit (both P < 0.05 vs. baseline). The frequency of ATG120 administrations was adjusted to every 4 weeks in 12 patients, every 6 weeks in 4 patients and every 8 weeks in 6 patients; 1 patient withdrew before the dose adjustment. Serum GH and IGF-I achieved at the end of Period 1 and Period 2 were similar to those reached with o-LAR. The number of patients who achieved GH < 2.5 microg/l was comparable between o-LAR (43%) and ATG120 at Period 1 (48%) and at Period 2 (62%). Normal IGF-I levels were recorded in 8 patients during o-LAR (35%), 11 during ATG Period 1 (48%) and 10 at the final visit (43%). Last, 4 patients showed a better response to ATG120 and 2 to o-LAR. CONCLUSIONS Lanreotide Autogel 120 mg is an effective and well-tolerated therapy for acromegaly. In approximately half of patients ATG120 may be administered every 6-8 weeks, instead of every 4 weeks, without lost of efficacy.
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Affiliation(s)
- C L Ronchi
- Department of Medical Sciences, University of Milan, Unit of Endocrinology and Metabolism, Fondazione IRCCS Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena, Milan, Italy.
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Abstract
Octreotide has dramatically changed the results of medical treatment of acromegaly. It is the reference drug for the pharmacological treatment of acromegaly, owing to its impressive efficacy in suppressing growth hormome secretion, and excellent compliance. Safe growth hormone and normal insulin-like growth factor I values are reached in 50-60% of unselected patients. Octreotide arrests the growth of the tumor and shrinks tumor in over half of all patients (namely, up to 88% of naive patients and to complete disappearance in anecdotic cases). The safety profile of octreotide is excellent, but in some patients, glucose metabolism worsens and cholelythiasis occurs. This review will address the primary treatment and the relative roles of pharmacological and surgical treatment, as well as the predictivity of octreotide results.
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Affiliation(s)
- Renato Cozzi
- a Ospedale Niguarda Milano, Division of Endocrinology, via Canonica 81, 20154 Milano, Italy.
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Fainstein Day P, Frohman L, Garcia Rivello H, Reubi JC, Sevlever G, Glerean M, Fernandez Gianotti T, Pietrani M, Rabadan A, Racioppi S, Bidlingmaier M. Ectopic growth hormone-releasing hormone secretion by a metastatic bronchial carcinoid tumor: a case with a non hypophysial intracranial tumor that shrank during long acting octreotide treatment. Pituitary 2007; 10:311-9. [PMID: 17373589 DOI: 10.1007/s11102-007-0019-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Ectopic acromegaly represents less than 1% of the reported cases of acromegaly. Although clinical improvement is common after treatment with somatostatin (SMS) analogs, the biochemical response and tumor size of the growth hormone-releasing hormone (GHRH)-producing tumor and its metastases are less predictable. Subject A 36-year-old male was referred because of a 3-year history of acromegaly related symptoms. He had undergone lung surgery in 1987 for a "benign" carcinoid tumor. Endocrine evaluation confirmed acromegaly Plasma IGF-1: 984 ng/ml (63-380), GH: 49.8 ng/ml (<5). MRI showed a large mass in the left cerebellopontine angle and diffuse pituitary hyperplasia. Pulmonary, liver and bone metastases were shown by chest and abdominal CT scans. Ectopic GHRH secretion was suspected. Methods Measurement of circulating GHRH levels by fluorescence immunoassay levels and immunohistochemical study of the primary lung tumor and metastatic tissue with anti-GHRH and anti-somatostatin receptor type 2 (sst2A) antibodies. Results Basal plasma GHRH: 4654 pg/ml (<100). Pathological study of liver and bone biopsy material and lung tissue removed 19 years earlier was consistent with an atypical carcinoid producing GHRH and exhibiting sst2A receptor expression. Treatment with octreotide LAR 20-40 mg q. month resulted in normalization of plasma IGF-1 levels. Circulating GHRH levels decreased dramatically. The size of the left prepontine cistern mass, with SMS receptors shown by a radiolabeled pentetreotide scan, decreased by 80% after 18 months of therapy. Total regression of pituitary enlargement was also observed. No changes were observed in lung and liver metastases. After 24 months of therapy the patient is asymptomatic and living a full and active life.
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Affiliation(s)
- Patricia Fainstein Day
- Department of Endocrinology and Nuclear Medicine, Hospital Italiano, Gascón 450 (1187), Buenos Aires, Argentina.
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Biermasz NR, Romijn JA, Pereira AM, Roelfsema F. Current pharmacotherapy for acromegaly: a review. Expert Opin Pharmacother 2006; 6:2393-405. [PMID: 16259571 DOI: 10.1517/14656566.6.14.2393] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Acromegaly is associated with considerable morbidity and excess mortality; however, after effective treatment, both morbidity and mortality risks improve. Growth hormone excess in acromegaly can be controlled in many patients by pharmacotherapy alone, and with a combination of transsphenoidal surgery and pharmacotherapy in almost all patients. Since the clinical introduction of pegvisomant, a growth hormone-receptor antagonist, the role of radiotherapy is restricted. This review focuses on the treatment options for acromegaly (e.g., surgery, radiotherapy and pharmacotherapy with the depot preparations of the somatostatin analogues octreotide long-acting release formulation, lanreotide slow-release formulation and lanreotide Autogel, the growth hormone antagonist pegvisomant and the dopamine agonist cabergoline). Pharmacological characteristics of these drugs and the clinical and adverse effects are discussed individually and in relation to the other treatment modalities. The evidence for biochemical goals aimed at during medical treatment and the costs of pharmacotherapy are discussed. A new treatment algorithm is proposed, in which the choice between primary medical treatment and primary surgery is individualised, dependent on adenoma size and extension, patient factors (age, preference for therapy, contraindication for surgery), surgical experience of the centre and octreotide sensitivity of the adenoma. The high cost of lifelong medical treatment, especially of pegvisomant, must be weighed against the cost of a single surgical procedure.
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Affiliation(s)
- Nienke R Biermasz
- Department of Endocrinology and Metabolism, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
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Biermasz NR, Pereira AM, Neelis KJ, Roelfsema F, Romijn JA. Role of radiotherapy in the management of acromegaly. Expert Rev Endocrinol Metab 2006; 1:449-460. [PMID: 30764082 DOI: 10.1586/17446651.1.3.449] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Active acromegaly can be treated effectively by transsphenoidal surgery, radiotherapy and medical treatment in the form of somatostatin analogs and growth hormone receptor antagonists. Many patients will require a combination of treatment modalities to normalize growth hormone excess and associated increased mortality, and to improve comorbidity. Following postoperative radiotherapy, growth hormone and insulin-like growth factor-I levels gradually decrease and normalization of growth hormone and insulin-like growth factor-I is achieved in 50% of patients after 5 years and 75% after 10 years. Disadvantages of radiotherapy include the long interval until hormone levels have sufficiently decreased and the high incidence of radiation-induced hypopituitarism. Radiotherapy was associated with increased mortality in some but not other studies. Limitations in the design and confounding factors, such as years spent with active disease and changing treatment strategies, make it impossible to draw conclusions on this topic. Gamma knife radiosurgery may combine faster decline of growth hormone excess with a lower incidence of hypopituitarism in eligible cases, but long-term results of this radiation technique are lacking. At present, patients will preferentially be treated by primary surgery and/or somatostatin analog treatment, followed, if necessary, by growth hormone receptor antagonist treatment, while radiotherapy is reserved for selected cases only. The indications for radiotherapy and radiosurgery need to be revisited in the near future, when longer follow-up results for medical treatment and radiosurgery have become available. This review summarizes the recent literature on efficacy and side effects of radiotherapy and radiosurgery in acromegaly and discusses the place of radiation treatment in the treatment algorithm of acromegaly.
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Affiliation(s)
- Nienke R Biermasz
- a Leiden University Medical Center, Departments of Endocrinology and Metabolism, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Alberto M Pereira
- b Leiden University Medical Center, Departments of Endocrinology and Metabolism, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Karen J Neelis
- c Leiden University Medical Center, Department of Clinical Oncology, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Ferdinand Roelfsema
- d Leiden University Medical Center, Departments of Endocrinology and Metabolism, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Johannes A Romijn
- e Leiden University Medical Center, Departments of Endocrinology and Metabolism, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
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Damjanovic SS, Neskovic AN, Petakov MS, Popovic V, Macut D, Vukojevic P, Joksimovic MM. Clinical indicators of biochemical remission in acromegaly: does incomplete disease control always mean therapeutic failure? Clin Endocrinol (Oxf) 2005; 62:410-7. [PMID: 15807870 DOI: 10.1111/j.1365-2265.2005.02233.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Correction of GH and IGF-I levels are associated with improvements in insulin secretion, cardiac performance and body composition in patients with acromegaly, but whether these parallel post-treatment levels of GH-IGF-I axis activity is undefined. We investigate whether various biochemical outcomes after transsphenoidal pituitary surgery (TSS) in these patients are associated with clinically relevant differences in cardiac performance, insulin resistance and body composition. DESIGN Cross-sectional study of consecutive patients with acromegaly admitted to the hospital between 2001 and 2002. PATIENTS AND METHODS Forty-one patients after TSS for somatotroph pituitary adenoma and 23 patients with naive acromegaly serving as positive controls were enrolled in the study. Mean daily GH levels (mGH), IGF-I, leptin and lipid levels, glucose, insulin and GH concentrations during oral glucose tolerance test (oGTT) were measured in all study participants. Insulin resistance was measured by homeostatic model index (R(HOMA)). Body composition was assessed by dual-energy X-ray absorptiometry. Left ventricular mass index (LVM(i)) and cardiac index (C(i)) were determined by echocardiography. RESULTS We found no difference in cardiac indices, insulin resistance, body composition and leptin levels between patients with complete biochemical remission and those with inadequately controlled disease (P > 0.05 for all) after TSS. Cured patients had lower values (mean +/- SD) of cardiac index (2.2 +/- 0.7 vs. 3.0 +/- 1.0 l/min/m(2); P = 0.04) compared with naive patients. A similar decrease in LVM(i) was observed in controlled (108.4 +/- 30.0 g/m(2); P = 0.015) and inadequately controlled disease (108.8 +/- 30.7 g/m(2); P = 0.03) in comparison with naive disease (160.3 +/- 80.6 g/m(2)). Insulin resistance and leptin changed in opposite ways. In controlled and inadequately controlled disease, R(HOMA) index was lower (2.2 +/- 1.4; P = 0.001 and 3.1 +/- 2.0; P = 0.05 vs. 5.1 +/- 3.1) while leptin concentration was higher (14.9 +/- 8.7 microg/l, P = 0.004 and 12.8 +/- 7.8 microg/l, P = 0.05 vs. 7.4 +/- 3.8 microg/l) than in naive disease. In all patients, leptin correlated negatively with cardiac index (r = -0.46; P = 0.001) and IGF-I levels (r = -0.45; P < 0.001). Independent predictors of biochemical remission, based on normal IGF-I levels only, were cardiac [P = 0.04, odds ratio (OR) 0.4; 95% confidence interval (CI) 0.2-0.9] and R(HOMA) index (P = 0.009, OR 0.6; 95% CI 0.4-0.8). Similar results were obtained if the definition of cure included both normal IGF-I levels and the ability to achieve GH nadir < 1 microg/l during oGTT. Insulin resistance (P = 0.02, OR 0.6; 95% CI 0.4-0.9) and leptin level (P = 0.002, OR 1.3; 95% CI 1.1-1.6) were independent predictors of normalized mGH values. CONCLUSION This study shows that cardiac indices, insulin resistance and body composition were not different between patients with complete biochemical remission and those with discordant GH and IGF-I levels. It appears that even incomplete disease control after TSS can result in improvement of these clinical markers.
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Affiliation(s)
- Svetozar S Damjanovic
- Institute of Endocrinology, Diabetes and Diseases of Metabolism, Dr Subotica 13, 11000 Belgrade, Serbia.
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