1
|
Blodi BA, Domalpally A, Corkery E, Osborne A, Blotner S, Grzeschik SM, Gune S. Prevalence of Macular Atrophy in the MARINA Study of Ranibizumab versus Sham for Neovascular Age-Related Macular Degeneration. Ophthalmol Retina 2023:S2468-6530(23)00101-X. [PMID: 37086257 DOI: 10.1016/j.oret.2023.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 02/24/2023] [Accepted: 03/09/2023] [Indexed: 04/23/2023]
Abstract
OBJECTIVE Determine prevalence, progression rates, and associations of newly detectable macular atrophy (MA) in patients with choroidal neovascularization (CNV) secondary to neovascular age-related macular degeneration (nAMD) with/without ranibizumab treatment. DESIGN Post hoc analysis of MA in patients with occult/minimally classic nAMD who received monthly intravitreal ranibizumab (0.3 or 0.5 mg) or sham injections for 24 months (M) in MARINA, a phase III trial in treatment-naive patients (NCT00056836). PARTICIPANTS Seven hundred six patients with nAMD: ranibizumab 0.3 mg, n = 236; 0.5 mg, n = 237; sham, n = 233. METHODS Macular atrophy, assessed by color fundus photographs/fluorescein angiography, was classified as "within," "adjacent," or "nonadjacent" to the original CNV lesion. Factors associated with MA were assessed by multivariate logistic regression. MAIN OUTCOME MEASURES Prevalence/incidence of newly detectable MA over time, association with CNV area, MA progression rate, association of MA with visual acuity (VA), changes in CNV/leakage area, and factors predictive of new MA at 24M. RESULTS At 24M, new MA was detected in 36.8%, 40.4%, and 21.0% of eyes for ranibizumab 0.3 mg, 0.5 mg, and sham, respectively, most frequently within the area of the baseline CNV lesion (93.2%, 85.0%, and 69.0%). Rate of MA progression was similar across arms (∼ 0.3 to 0.4 mm/year). There was strong association between absence of fibrosis and detectable MA (odds ratio, 2.7; 95% confidence interval [CI], 1.29-5.56), whereas an association was not identified between detectable MA and baseline VA, baseline fellow eye atrophy, ranibizumab treatment, or change in leakage/CNV area at 24M. Ranibizumab-treated eyes gained VA with (0.3 mg: 5.3 letters [95% CI, -3.3, 13.8]; 0.5 mg: 9.8 [4.7-15.0]) or without new MA (0.3 mg: 6.4 [4.1-8.6]; 0.5 mg: 8.0 [5.3-10.6]), whereas VA in sham-treated eyes deteriorated with/without new MA (-14.7 [-23.6, -5.8] and -14.0 [-16.9, -11.1], respectively). CONCLUSIONS New MA was more frequently detected in ranibizumab-treated than sham-treated eyes. Macular atrophy progression was similar across arms. Multivariate analysis showed that absence of fibrosis was the only variable associated with increased MA. Regardless of MA presence/location at baseline or throughout the study, ranibizumab-treated eyes showed clinically significant improvements in VA, whereas VA in sham-treated eyes worsened. FINANCIAL DISCLOSURE(S) Proprietary or commercial disclosure may be found after the references.
Collapse
Affiliation(s)
- Barbara A Blodi
- Wisconsin Reading Center, Department of Ophthalmology and Visual Science, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
| | - Amitha Domalpally
- Wisconsin Reading Center, Department of Ophthalmology and Visual Science, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Ellie Corkery
- Wisconsin Reading Center, Department of Ophthalmology and Visual Science, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | | | | | | | - Shamika Gune
- Genentech, Inc., South San Francisco, California
| |
Collapse
|
2
|
Holekamp NM, Sadda S, Sarraf D, Guymer R, Hill L, Blotner S, Spicer G, Gune S. Effect of Residual Retinal Fluid on Visual Function in Ranibizumab-Treated Neovascular Age-Related Macular Degeneration. Am J Ophthalmol 2022; 233:8-17. [PMID: 34289338 DOI: 10.1016/j.ajo.2021.06.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/26/2021] [Accepted: 06/26/2021] [Indexed: 12/25/2022]
Abstract
PURPOSE To investigate the relationship between retinal fluid and vision in ranibizumab-treated patients with neovascular age-related macular degeneration (nAMD). DESIGN Clinical cohort study using post hoc analysis of clinical trial data. METHODS We assessed data from HARBOR (NCT00891735), a phase III, randomized, controlled trial. We reviewed 917 patients ≥50 years of age with subfoveal nAMD associated with subretinal (SRF) and/or intraretinal fluid (IRF) at baseline, screening, or week 1. The intervention was intravitreal ranibizumab 0.5 or 2.0 mg (all treatment arms pooled). Outcomes included mean best-corrected visual acuity (BCVA) and BCVA change from baseline at months (M) 12 and 24 evaluated by the presence/absence of SRF and/or IRF. RESULTS Baseline BCVA was higher with residual vs resolved SRF at M12 (mean [95% confidence interval {CI}] 58.8 letters [57.2-60.4] vs 53.5 [52.4-54.5]) and M24 (59.3 letters [57.8-60.8] vs 53.5 [52.5-54.5]). Mean BCVA change (adjusted for baseline) to M12 was greater with residual vs resolved SRF (mean difference [95% CI], +2.4 letters [+0.1 to +4.7]), but lower with residual vs resolved IRF (-3.5 letters [-5.8 to -1.2]). Eyes with residual SRF (no IRF) exhibited the largest mean BCVA gains (M12, +14.1 letters; M24, +13.2 letters), followed by resolved SRF/IRF (M12, +10.6 letters; M24, +10.0 letters), residual SRF/IRF (M12, +7.2 letters; M24, +8.5 letters), and residual IRF only (M12, +5.5 letters; M24, +3.6 letters). CONCLUSIONS Vision outcomes (adjusted for baseline BCVA) through M24 were better in ranibizumab-treated eyes with residual vs resolved SRF, and worse with residual vs resolved IRF. Presence of residual retinal fluid requires a more complex and nuanced assessment and interpretation in the context of nAMD management.
Collapse
Affiliation(s)
| | - Srinivas Sadda
- Doheny Eye Institute, University of California, Los Angeles, Pasadena, California, USA
| | - David Sarraf
- Stein Eye Institute, University of California, Los Angeles, Los Angeles, California, USA
| | - Robyn Guymer
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, and Department of Surgery (Ophthalmology), University of Melbourne, Melbourne, Australia
| | - Lauren Hill
- Genentech, Inc., South San Francisco, California, USA
| | - Steve Blotner
- Genentech, Inc., South San Francisco, California, USA
| | - Galin Spicer
- Genentech, Inc., South San Francisco, California, USA
| | - Shamika Gune
- Genentech, Inc., South San Francisco, California, USA
| |
Collapse
|
3
|
Kurzrock R, Bowles DW, Kang H, Meric-Bernstam F, Hainsworth J, Spigel DR, Bose R, Burris H, Sweeney CJ, Beattie MS, Blotner S, Schulze K, Cuchelkar V, Swanton C. Targeted therapy for advanced salivary gland carcinoma based on molecular profiling: results from MyPathway, a phase IIa multiple basket study. Ann Oncol 2020; 31:412-421. [PMID: 32067683 PMCID: PMC9743163 DOI: 10.1016/j.annonc.2019.11.018] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/08/2019] [Accepted: 11/28/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Systemic therapy options for salivary cancers are limited. MyPathway (NCT02091141), a phase IIa study, evaluates targeted therapies in non-indicated tumor types with actionable molecular alterations. Here, we present the efficacy and safety results for a subgroup of MyPathway patients with advanced salivary gland cancer (SGC) matched to targeted therapies based on tumor molecular characteristics. PATIENTS AND METHODS MyPathway is an ongoing, multiple basket, open-label, non-randomized, multi-center study. Patients with advanced SGC received pertuzumab + trastuzumab (HER2 alteration), vismodegib (PTCH-1/SMO mutation), vemurafenib (BRAF V600 mutation), or atezolizumab [high tumor mutational burden (TMB)]. The primary endpoint is the objective response rate (ORR). RESULTS As of January 15, 2018, 19 patients with SGC were enrolled and treated in MyPathway (15 with HER2 amplification and/or overexpression and one each with a HER2 mutation without amplification or overexpression, PTCH-1 mutation, BRAF mutation, and high TMB). In the 15 patients with HER2 amplification/overexpression (with or without mutations) who were treated with pertuzumab + trastuzumab, 9 had an objective response (1 complete response, 8 partial responses) for an ORR of 60% (9.2 months median response duration). The clinical benefit rate (defined by patients with objective responses or stable disease >4 months) was 67% (10/15), median progression-free survival (PFS) was 8.6 months, and median overall survival was 20.4 months. Stable disease was observed in the patient with a HER2 mutation (pertuzumab + trastuzumab, n = 1/1, PFS 11.0 months), and partial responses in patients with the PTCH-1 mutation (vismodegib, n = 1/1, PFS 14.3 months), BRAF mutation (vemurafenib, n = 1/1, PFS 18.5 months), and high TMB (atezolizumab, n = 1/1, PFS 5.5+ months). No unexpected toxicity occurred. CONCLUSIONS Overall, 12 of 19 patients (63%) with advanced SGC, treated with chemotherapy-free regimens matched to specific molecular alterations, experienced an objective response. Data from MyPathway suggest that matched targeted therapy for SGC has promising efficacy, supporting molecular profiling in treatment determination.
Collapse
Affiliation(s)
- R. Kurzrock
- Moores Cancer Center, UC San Diego, San Diego,Correspondence to: Dr Razelle Kurzrock, Moores Cancer Center, UC San Diego, 3855 Health Sciences Dr. #1503, La Jolla, CA 92093, USA. Tel: +1-858-246-1102; Fax: +1-858-246-1915, (R. Kurzrock)
| | - D. W. Bowles
- Department of Medicine, University of Colorado Denver, Aurora
| | - H. Kang
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore
| | - F. Meric-Bernstam
- Department of Investigational Cancer Therapeutics, University of Texas MD Anderson Cancer Center, Houston
| | - J. Hainsworth
- Oncology Department, Sarah Cannon Research Institute, Nashville,Tennessee Oncology, PLLC, Nashville
| | - D. R. Spigel
- Oncology Department, Sarah Cannon Research Institute, Nashville,Tennessee Oncology, PLLC, Nashville
| | - R. Bose
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis
| | - H. Burris
- Oncology Department, Sarah Cannon Research Institute, Nashville,Tennessee Oncology, PLLC, Nashville
| | - C. J. Sweeney
- Dana-Farber Cancer Institute, Harvard Medical School, Boston
| | - M. S. Beattie
- Department of Product Development, Medical Affairs, F. Hoffmann-La Roche, South San Francisco, USA
| | - S. Blotner
- Department of Biostatistics, South San Francisco, USA
| | - K. Schulze
- Department of Oncology Biomarker Development, South San Francisco, USA
| | - V. Cuchelkar
- Department of BioOncology, Genentech, Inc., South San Francisco, USA
| | - C. Swanton
- Department of Tumour Biology, Francis Crick Institute, London, UK
| |
Collapse
|
4
|
Razak A, Gore L, Britten C, Miller W, Uy G, Nichols G, Middleton S, Blotner S, Zhi J, Jukofsky L, Pierceall W, Higgins B, Chen L. A phase I study of the MDM2 antagonist RO6839921, a pegylated prodrug of idasanutlin, for intravenous (IV) administration in patients with advanced solid tumors. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32645-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
5
|
Leijen S, Middleton MR, Tresca P, Kraeber-Bodéré F, Dieras V, Scheulen ME, Gupta A, Lopez-Valverde V, Xu ZX, Rueger R, Tessier JJL, Shochat E, Blotner S, Naegelen VM, Schellens JHM, Eberhardt WEE. Phase I dose-escalation study of the safety, pharmacokinetics, and pharmacodynamics of the MEK inhibitor RO4987655 (CH4987655) in patients with advanced solid tumors. Clin Cancer Res 2012; 18:4794-805. [PMID: 22767668 DOI: 10.1158/1078-0432.ccr-12-0868] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE This phase I study of the mitogen-activated protein/extracellular signal-regulated kinase inhibitor RO4987655 (CH4987655) assessed its maximum tolerated dose (MTD), dose-limiting toxicities (DLT), safety, pharmacokinetic/pharmacodynamic profile, and antitumor activity in patients with advanced solid tumors. PATIENTS AND METHODS An initial dose escalation was conducted using a once-daily dosing schedule, with oral RO4987655 administered at doses of 1.0 to 2.5 mg once daily over 28 consecutive days in 4-week cycles. Doses were then escalated from 3.0 to 21.0 mg [total daily dose (TDD)] using a twice-daily dosing schedule. RESULTS Forty-nine patients were enrolled. DLTs were blurred vision (n = 1) and elevated creatine phosphokinase (n = 3). The MTD was 8.5 mg twice daily (TDD, 17.0 mg). Rash-related toxicity (91.8%) and gastrointestinal disorders (69.4%) were the most frequent adverse events. The pharmacokinetic profile of RO4987655 showed dose linearity and a half-life of approximately 4 hours. At the MTD, target inhibition, assessed by suppression of extracellular signal-regulated kinase phosphorylation in peripheral blood mononuclear cells, was high (mean 75%) and sustained (90% of time >IC(50)). Of the patients evaluable for response, clinical benefit was seen in 21.1%, including two partial responses (one confirmed and one unconfirmed). 79.4% of patients showed a reduction in fluorodeoxyglucose uptake by positron emission tomography between baseline and day 15. CONCLUSION In this population of heavily pretreated patients, oral RO4987655 showed manageable toxicity, a favorable pharmacokinetics/pharmacodynamics profile, and promising preliminary antitumor activity, which has been further investigated in specific populations of patients with RAS and/or RAF mutation driven tumors.
Collapse
Affiliation(s)
- Suzanne Leijen
- The Netherlands Cancer Institute, Amsterdam; Department of Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Martinez-Garcia M, Banerji U, Albanell J, Bahleda R, Dolly S, Kraeber-Bodéré F, Rojo F, Routier E, Guarin E, Xu ZX, Rueger R, Tessier JJL, Shochat E, Blotner S, Naegelen VM, Soria JC. First-in-human, phase I dose-escalation study of the safety, pharmacokinetics, and pharmacodynamics of RO5126766, a first-in-class dual MEK/RAF inhibitor in patients with solid tumors. Clin Cancer Res 2012; 18:4806-19. [PMID: 22761467 DOI: 10.1158/1078-0432.ccr-12-0742] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE This phase I study assessed the maximum tolerated dose (MTD), dose-limiting toxicities (DLT), safety, pharmacokinetics, pharmacodynamics, and clinical activity of the first-in-class dual MEK/RAF inhibitor, RO5126766. EXPERIMENTAL DESIGN Initial dose-escalation was conducted using once daily dosing over 28 consecutive days in 4-week cycles. Further escalation was completed using 2 intermittent dosing schedules [7 days on treatment followed by 7 days off (7on/7off); 4 days on treatment followed by 3 days off (4on/3off)]. RESULTS Fifty-two patients received RO5126766 at doses of 0.1 to 2.7 mg once daily, 2.7 to 4.0 mg (4 on/3 off), or 2.7 to 5.0 mg (7 on/7 off). The most common DLTs were elevated creatine phosphokinase (CPK) and blurred vision. The MTD for each dosing schedule was 2.25 mg once daily, 4.0 mg (4 on/3 off), and 2.7 mg (7 on/7 off). The dose/schedule recommended for phase II (RP2D) investigation was 2.7 mg (4 on/3 off). Frequent adverse events included rash-related disorders (94.2%), elevated CPK (55.8%), and diarrhea (51.9%). C(max) occurred 1 to 2 hours after dosing and mean terminal half-life was approximately 60 hours. Pharmacodynamic changes included reduced ERK phosphorylation, an increase in apoptosis in tumor tissue, and a reduction in fluorodeoxyglucose (FDG) uptake after 15 days of dosing. Three partial responses were seen: two in BRAF-mutant melanoma tumors and one in an NRAS-mutant melanoma. CONCLUSION This first-in-human study shows that oral RO5126766 has manageable toxicity, a favorable pharmacokinetic/pharmacodynamic profile, and encouraging preliminary antitumor activity in this population of heavily pretreated patients, achieving tumor shrinkage in around 40% of patients across all dose levels and all tumor types.
Collapse
Affiliation(s)
- Maria Martinez-Garcia
- Medical Oncology Service, Hospital del Mar, Autonomous University of Barcelona, Barcelona, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Leijen S, Middleton MR, Tresca P, Kraeber-Bodere F, Dieras V, Scheulen ME, Tessier J, Xu ZX, Shochat E, Walz A, Deutsch J, Blotner S, Lopez Valverde V, Naegelen VM, Schellens JHM, Eberhardt WE. Phase I (Ph) safety, pharmacodynamic (PD), and pharmacokinetic (PK) trial of a pure MEK inhibitor (i), RO4987655, in patients with advanced /metastatic solid tumor. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.3017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
8
|
Dolly SO, Albanell J, Kraeber-Bodere F, Banerji U, Bahleda R, Martinez Garcia M, Xu ZX, Guarin E, Tessier J, Shochat E, Deutsch J, Blotner S, Meresse V, Soria J. First-in-human, safety, pharmacodynamic (PD) and pharmacokinetic (PK) trial of a first-in-class dual RAF/MEK inhibitor, RO5126766, in patients with advanced or metastatic solid tumors. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.3006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
9
|
Lee L, Niu H, Goelzer P, Rueger R, Deutsch J, Busse-Reid R, DeSchepper S, Blotner S, Barrett J, Weissgerber G, Peck R. The safety, tolerability, pharmacokinetics, and pharmacodynamics of single oral doses of RO5068760, an MEK inhibitor, in healthy volunteers: assessment of target suppression. J Clin Pharmacol 2010; 50:1397-405. [PMID: 20386016 DOI: 10.1177/0091270010361254] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
RO5068760, a substituted hydantoin, represents a new class of potent, highly selective, non-adenosine triphosphate (ATP)-competitive MEK1/2 inhibitors. The study aimed to determine the safety/tolerability, pharmacokinetics, and pharmacodynamics of single ascending doses of RO5068760 in human healthy volunteers. All participants received a single dose followed by 48 hours of pharmacokinetics, pharmacodynamics, and safety/tolerability assessments. The pharmacodynamics were measured by changes in ERK phosphorylation (pERK) in peripheral blood mononuclear cells, ex vivo stimulated by phorbol 12-myristate 13-acetate (PMA). Forty-eight participants received 6 doses (50, 100, 200, 400, 600, 800 mg). RO5068760 was well tolerated up to 800 mg. There were no clinically significant safety findings, including laboratory, electrocardiogram, ophthalmological assessment, and fecal occult blood tests. Of the total 13 adverse events (n = 12), 11 were mild, 2 were moderate, and none were severe, and only 5 were considered by the investigator as possibly related to treatment. RO5068760 was absorbed with a t(max), of 2 hours. Disposition appeared to be biphasic with a terminal elimination t(1/2) of 5 to 9 hours. The variability was moderate to high, ranging from 38% to 62% for C(max) and 41% to 69% AUC. Within the dose range tested, pERK inhibition was relatively modest with a mean maximal pERK suppression of 55%.
Collapse
Affiliation(s)
- Lucy Lee
- Clinical Pharmacology, Hoffman-La Roche, Inc, 340 Kingsland Street, Nutley, NJ 07110, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Abstract
Orlistat is a gastrointestinal lipase inhibitor that is used to reduce dietary fat absorption and to enhance weight loss in subjects consuming a hypocaloric diet. To assess whether orlistat has an effect on the metabolism of six minerals, a 21-d, double-blind, randomized, parallel-group, placebo-controlled mineral balance study was conducted in obese (body mass index > 30 kg/m(2)) men. Subjects consumed a hypocaloric diet with a constant daily mineral content and received daily oral treatment with orlistat (120 mg three times daily) (n = 14) or placebo (three times daily) (n = 14) for 21 d. After a 14-d equilibration period, calcium, phosphorus, magnesium, iron, copper and zinc balances were assessed for d 15-21. In addition, the effect of diet and orlistat treatment on bone metabolism was estimated from measurement of biomarkers of bone formation and bone resorption. Serum and urine electrolytes were also measured at baseline and at the end of treatment. Orlistat inhibited fat absorption by approximately 33% (P < 0.05). There were no significant differences in mineral apparent absorption, urinary mineral loss or mineral balance between the orlistat and placebo groups. Markers of bone turnover and serum and urine electrolytes did not differ between the orlistat and placebo groups. Orlistat was well tolerated; adverse events were of mild or moderate intensity, and the majority of these events were unrelated or remotely related to study treatment. In obese men consuming a hypocaloric diet, the administration of orlistat had no significant effect on the balance of six selected minerals. In addition, biomarkers of bone turnover, as well as serum and urine electrolytes, were not affected by orlistat treatment.
Collapse
Affiliation(s)
- D G Pace
- Roche Laboratories Inc., Nutley, New Jersey, USA.
| | | | | |
Collapse
|
11
|
Shepard TY, Jensen DR, Blotner S, Zhi J, Guerciolini R, Pace D, Eckel RH. Orlistat fails to alter postprandial plasma lipid excursions or plasma lipases in normal-weight male volunteers. Int J Obes (Lond) 2000; 24:187-94. [PMID: 10702769 DOI: 10.1038/sj.ijo.0801105] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES After 10 d of orlistat administration (120 mg three times/day), the primary objective was to determine the drug's effect on postprandial plasma lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL) activities on day 10 after an oral fat-load. The secondary objectives were to determine the effects of orlistat on 12 h postprandial measures of: (1) preheparin HTGL and LPL; and (2) serum triglycerides, very-low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and free fatty acids. METHODS Twenty-four normal-weight, healthy male volunteers were randomized to either 120 mg orlistat (n=12) or placebo (n=12) three times a day with meals for 10 d. Preheparin LPL and HTGL activities and LPL specific activity were measured in the fasted state on days 1, 5, and 10. On days 5 and 10 the study medication (orlistat or placebo) was taken at the beginning of a fat-rich breakfast and serum lipid and lipoprotein levels monitored for 12 h postprandially. On day 10, 15 min postheparin HTGL activity was measured 8 h after the fat-rich breakfast. RESULTS No differences were found between groups in fasting levels of preheparin LPL or HTGL activity or in LPL-specific activity on days 1, 5 and 10. No difference was found between the two treatment groups in postheparin HTGL activity 8 h after the fat-rich breakfast. Also, no differences were found between the two groups in plasma triglycerides or lipoproteins. CONCLUSION The results indicate that the oral administration of orlistat (120 mg t. i.d.) does not significantly alter plasma triglycerides or lipoproteins, and that the inhibitory effect of orlistat on lipases is limited to the gastrointestinal tract and is not manifested systemically.
Collapse
Affiliation(s)
- T Y Shepard
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Health Sciences Center, 4200 E. 9th Avenue, Denver, CO 80262, USA
| | | | | | | | | | | | | |
Collapse
|