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Avila-Tavares R, Gibran L, Brito LGO, Tavoni TM, Gonçalves MO, Baracat EC, Maranhão RC, Podgaec S. Pilot study of treatment of patients with deep infiltrative endometriosis with methotrexate carried in lipid nanoparticles. Arch Gynecol Obstet 2024; 309:659-667. [PMID: 37987824 DOI: 10.1007/s00404-023-07246-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 09/27/2023] [Indexed: 11/22/2023]
Abstract
OBJECTIVE Previously, lipid nanoparticles (LDE) injected in women with endometriosis were shown to concentrate in the lesions. Here, the safety and feasibility of LDE carrying methotrexate (MTX) to treat deep infiltrating endometriosis was tested. DESIGN Prospective pilot study. SETTING Perola Byington Hospital Reference for Women's Health. SUBJECTS Eleven volunteers (aged 30-47 years, BMI 26.15 ± 6.50 kg/m2) with endometriosis with visual analog scale pelvic pain scores (VAS) > 7 and rectosigmoid lesions were enrolled in the study. INTERVENTION Three patients were treated with LDE-MTX at single intravenous 25 mg/m2 dose of MTX and eight patients with two 25 mg/m2 doses with 1-week interval. MAIN OUTCOME MEASURES Clinical complaints, blood count, and biochemistry were analyzed before treatment and on days 90, 120, and 180 after LDE-MTX administration. Endometriotic lesions were evaluated by pelvic and transvaginal ultrasound (TVUS) before treatment and on days 30 and 180 after LDE-MTX administration. RESULTS No clinical complaints related with LDE-MTX treatment were reported by the patients, and no hematologic, renal, or hepatic toxicities were observed in the laboratorial exams. FSH, LH, TSH, free T4, anti-Müllerian hormone, and prolactin levels were also within normal ranges during the observation period. Scores for deep dyspareunia (p < 0.001), chronic pelvic pain (p = 0.008), and dyschezia (p = 0.025) were improved over the 180-day observation period. There was a non-significant trend for reduction of VAS scores for dysmenorrhea. Bowel lesions by TVUS were unchanged. No clear differences between the two dose levels in therapeutic responses were observed. CONCLUSION Results support the safety and feasibility of using LDE-MTX in women with deep infiltrating endometriosis as a novel and promising therapy for the disease. More prolonged treatment schemes should be tested in future placebo-controlled studies aiming to establish the usefulness of this novel nanomedicine approach.
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Affiliation(s)
- Roberta Avila-Tavares
- Gynecological Endoscopy Center of the Perola Byington Hospital Reference for Women's Health, São Paulo, Brazil.
- Department of Obstetrics and Gynecology, School of Medical Sciences, University of Campinas, Campinas, Brazil.
| | - Luciano Gibran
- Gynecological Endoscopy Center of the Perola Byington Hospital Reference for Women's Health, São Paulo, Brazil
| | - Luiz Gustavo Oliveira Brito
- Department of Obstetrics and Gynecology, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Thauany Martins Tavoni
- Lipid Metabolism Laboratory, Heart Institute, University of Sao Paulo, São Paulo, Brazil
| | | | - Edmund Chada Baracat
- Department of Obstetrics and Gynecology, Medical School Hospital, University of Sao Paulo, São Paulo, Brazil
| | | | - Sergio Podgaec
- Department of Obstetrics and Gynecology, Medical School Hospital, University of Sao Paulo, São Paulo, Brazil
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Albuquerque CI, Tavares ER, Guido MC, Carvalho PO, Tavoni TM, Lopes NM, Silva BMDO, Jensen L, Stolf NAG, Maranhão RC. Treatment of rabbits with atherosclerosis induced by cholesterol feeding with daunorubicin associated to a lipid core nanoparticle (LDE). J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2022.104067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Vital CG, Maranhão RC, Freitas FR, Van Eyll BM, Graziani SR. Use of paclitaxel carried in lipid core nanoparticles in patients with late-stage solid cancers with bone metastases: Lack of toxicity and therapeutic benefits. J Bone Oncol 2022; 34:100431. [PMID: 35517058 PMCID: PMC9065304 DOI: 10.1016/j.jbo.2022.100431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 11/30/2022] Open
Abstract
LDE-PTX at 175 mg/m2/3wk dose was devoid of toxicity at > 3rd line treatment. Among 18 LDE-PTX treated patients, 9 had PFS > 6 months and 2 had PFS > 1 yr. LDE-PTX diminished bone pain and improved quality of life in all treated patients.
Patients with heavily pretreated, late-stage cancer and bone metastasis are usually poor candidates for further chemotherapy. Previously, we showed that association to lipid nanoparticles (LDE) drastically decreases the toxicity of anti-cancer drugs. Here, we tested the hypothesis that paclitaxel (PTX) carried in LDE could benefit end-of-life patients with painful bone metastases that had been previously treated with conventional PTX. Methods: Eighteen consecutive patients with late-stage cancer, 8 with breast, 5 with prostate and 5 with lung carcinoma, aged 59±9 years, were included in this study. All were receiving opioid medication. LDE-PTX was administered at 175 mg/m 2 every 3 weeks until disease progression. Clinical imaging examinations and serum biochemistry determinations were performed to monitor disease progression. Intensity of bone pain, use of opioid medications and occurrence of pathological bone fractures were also evaluated. Results: In total, 104 chemotherapy cycles were performed and none of the patients showed clinical and laboratorial toxicities or pathological bone fractures. In all patients, pain was reduced so as to allow substitution of non-opioid for opioid medication. Median progression-free survival (PFS) was four months (95% CI 2.4-5.5), but in five patients PFS was longer than 6 months. Conclusions: Absence of observable clinical and laboratorial toxicities from LDE-PTX treatment, improvement of bone pain and the possible effect on PFS in some patients, despite previous use of conventional PTX, suggest that LDEPTX merits further clinical investigation.
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Pereira ELR, Feio DCA, Tavares JPL, Morikawa NM, Deus DF, Vital CG, Tavares ER, Maranhão RC. Uptake of lipid core nanoparticles by fragments of tissues collected during cerebral tumor excision surgeries: hypotheses for use in drug targeting therapy. J Neurooncol 2022; 158:413-421. [PMID: 35612697 DOI: 10.1007/s11060-022-04028-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/05/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE Malignant cerebral tumors have poor prognosis and the blood-brain barrier is a major hindrance for most drugs to reach those tumors. Lipid nanoparticles (LDE) that bind to lipoprotein receptors may carry anticancer drugs and penetrate the cells through those receptors that are overexpressed in gliomas. The aim was to investigate the in vivo uptake of LDE by human cerebral tumors. METHODS Twelve consecutive patients (4 with glioblastomas, 1 meduloblastoma, 1 primary lymphoma, 2 with non-cerebral metastases and 4 with benign tumors) scheduled for tumor excision surgery were injected intravenously, 12 h before surgery, with LDE labeled 14C-cholesterol oleate. Fragments of tumors and of normal head tissues (muscle, periosteum, dura mater) discarded by the surgeon were submitted to lipid extraction and radioactive counting. RESULTS Tumor LDE uptake (range: 10-283 d.p.m./g of tissue) was not lower than that of normal tissues (range: 20-263 d.p.m./g). Malignant tumor uptake was threefold greater than benign tumor uptake (140 ± 93 vs 46 ± 18 d.p.m./g, p < 0.05). Results show that LDE can concentrate in brain malignant tumors and may be used to carry drugs directed against those tumors. CONCLUSION As LDE was previously shown to markedly decrease drug toxicity this new therapeutic strategy should be tested in future trials.
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Affiliation(s)
- Edmundo Luís Rodrigues Pereira
- Servico de Cirurgia, Nucleo de Pesquisas em Neurooncologia, Hospital Universitario Joao de Barros Barreto, Universidade Federal do Para, Belem, Para, Brazil
| | | | - João Pojucan Lobo Tavares
- Servico de Cirurgia, Nucleo de Pesquisas em Neurooncologia, Hospital Universitario Joao de Barros Barreto, Universidade Federal do Para, Belem, Para, Brazil
| | - Natalia Megumi Morikawa
- Servico de Cirurgia, Nucleo de Pesquisas em Neurooncologia, Hospital Universitario Joao de Barros Barreto, Universidade Federal do Para, Belem, Para, Brazil
| | - Debora Fernandes Deus
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil
| | - Carolina Graziani Vital
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil
| | - Elaine Rufo Tavares
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil
| | - Raul Cavalcante Maranhão
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil. .,Faculdade de Ciencias Farmaceuticas, Universidade de Sao Paulo, São Paulo, Brazil. .,Instituto Nacional de Ciencias e Tecnologia em Fluidos Complexos (INCT-FCx), São Paulo, São Paulo, Brazil. .,Laboratório de Metabolismo e Lípides, Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Av. Dr. Enéas de Carvalho Aguiar, 44, bloco 2, 1º subsolo, São Paulo, SP, Brazil.
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Barkat MA, Harshita, Rizwanullah M, Pottoo FH, Beg S, Akhter S, Ahmad FJ. Therapeutic Nanoemulsion: Concept to Delivery. Curr Pharm Des 2020; 26:1145-1166. [PMID: 32183664 DOI: 10.2174/1381612826666200317140600] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/23/2020] [Indexed: 11/22/2022]
Abstract
Nanoemulsions (NEs) or nanometric-scaled emulsions are transparent or translucent, optically isotropic and kinetically stable heterogeneous system of two different immiscible liquids namely, water and oil stabilized with an amphiphilic surfactant having droplet size ranges up to 100 nm. They offer a variety of potential interests for certain applications: improved deep-rooted stability; excellent optical clarity; and, enhanced bioavailability due to its nanoscale of particles. Though there is still comparatively narrow insight apropos design, development, and optimization of NEs, which mainly stems from the fact that conventional characteristics of emulsion development and stabilization only partly apply to NEs. The contemporary article focuses on the nanoemulsion dosage form journey from concept to key application in drug delivery. In addition, industrial scalability of the nanoemulsion, as well as its presence in commercial and clinical practice, are also addressed.
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Affiliation(s)
- Md A Barkat
- Department of Pharmaceutics, College of Pharmacy, University of Hafr Al Batin, Al Jamiah, Hafr Al Batin 39524, Saudi Arabia
| | - Harshita
- Department of Pharmaceutics, College of Pharmacy, University of Hafr Al Batin, Al Jamiah, Hafr Al Batin 39524, Saudi Arabia
| | - Md Rizwanullah
- Formulation Research Lab, Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Faheem H Pottoo
- Department of Pharmacology, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University (Formerly University of Dammam), 31441, Dammam, Saudi Arabia
| | - Sarwar Beg
- Nanomedicine Research Lab, Department of Pharmaceutics, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Sohail Akhter
- Le Studium research fellow for Centre de Biophysique Moléculaire (CBM)-CNRS, University of Orléans, UPR4301, Orléans, France
| | - Farhan J Ahmad
- Nanomedicine Research Lab, Department of Pharmaceutics, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
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Rohr SS, Maranhão RC, Tavoni TM, Morikawa AT, Areco K, Deus DF, Oliveira JSR. Novel Approach for Bone Marrow Transplantation Conditioning in Acute Myelogenous Leukemia not Responding to the Induction Therapy Using Etoposide Carried in Lipid Core Nanoparticles: A Pilot Clinical Study. Biol Blood Marrow Transplant 2020; 26:2027-2033. [PMID: 32682949 DOI: 10.1016/j.bbmt.2020.07.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 07/08/2020] [Accepted: 07/08/2020] [Indexed: 11/18/2022]
Abstract
Allogeneic hematopoietic cell transplantation (HCT) is the treatment of choice for acute myelogenous leukemia (AML) not responding to induction therapy. It is a therapeutic choice for the blast phase of chronic myelogenous leukemia (CML-BP) in patients failing to respond to tyrosine kinase inhibitors (TKIs). Lipid core nanoparticles (LDEs) concentrate severalfold more in blast cells than in corresponding normal cells. Incorporation of anticancer drugs to LDE formulations increases the pharmacologic action and decreases the toxicity. We tested a drug-targeting system, LDE-etoposide plus total body irradiation (TBI; 1200 cGy dose), in 13 patients with AML not responding to the induction therapy and in 2 patients with CML-BP refractory to second-generation TKIs. The mean patient age was 46.7 years (range, 22 to 66 years). The LDE-etoposide dose was escalated at 20, 30, 40, 50, and 60 mg/kg. No patients developed grade 4 or 5 toxicity; however, mucositis grade 3 occurred in 6 patients, 3 patients experienced diarrhea, and 1 patient had an elevated total bilirubin level. No deaths were related to conditioning. All patients were successfully engrafted. The median times to neutrophil and platelet engraftment were 20 ± 5 days and 16 ± 4 days, respectively. Five patients (33.4%) had acute graft-versus-host-disease (GVHD), including 4 grade I, and 1 with grade II, and 8 patients (57.1%) had moderate-to-severe chronic GVHD. This pilot study shows the potential of LDE-etoposide plus TBI as an HCT conditioning regimen in AML patients not responding to the induction and refractory therapies for CML-BP patient. These findings pave the way for subsequent larger clinical trials.
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Affiliation(s)
- Sandra S Rohr
- Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil; Hospital Santa Marcelina, São Paulo, Brazil
| | - Raul C Maranhão
- Instituto do Coração (InCor), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil; Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil.
| | - Thauany M Tavoni
- Instituto do Coração (InCor), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil; Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Aleksandra T Morikawa
- Instituto do Coração (InCor), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Kelsy Areco
- Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Debora F Deus
- Instituto do Coração (InCor), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - José S R Oliveira
- Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil; Hospital Santa Marcelina, São Paulo, Brazil
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Plasma and erythrocyte ω-3 and ω-6 fatty acids are associated with multiple inflammatory and oxidative stress biomarkers in breast cancer. Nutrition 2019; 58:194-200. [DOI: 10.1016/j.nut.2018.07.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 06/23/2018] [Accepted: 07/17/2018] [Indexed: 12/18/2022]
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Bedin A, Maranhão RC, Tavares ER, Carvalho PO, Baracat EC, Podgaec S. Nanotechnology for the treatment of deep endometriosis: uptake of lipid core nanoparticles by LDL receptors in endometriotic foci. Clinics (Sao Paulo) 2019; 74:e989. [PMID: 31291391 PMCID: PMC6607935 DOI: 10.6061/clinics/2019/e989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 03/19/2019] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE Rapidly dividing cells in multiple types of cancer and inflammatory diseases undergo high low density lipoprotein (LDL) uptake for membrane synthesis, and coupling an LDL-like nanoemulsion, containing lipid nanoparticles (LDE) to a chemotherapeutic agent efficiently targets these cells without significant systemic effects. This was a prospective exploratory study that evaluated the uptake of a radioactively labeled LDE emulsion by receptors of endometriotic foci and the capacity of the LDE for cellular internalization. METHODS The lipid profile of each patient was determined before surgery, and labeled LDE were injected into fourteen patients with intestinal or nonintestinal endometriosis. The radioactivity of each tissue sample (intestinal endometriosis, nonintestinal endometriosis, healthy peritoneum, or topical endometrium) was measured. RESULTS The group with intestinal endometriosis presented higher levels of plasma LDL but lower LDE uptake by foci than the nonintestinal group, suggesting less cell division and more fibrosis. The uptake of LDE was highest in the topical endometrium, followed by the healthy peritoneum, and lowest in the endometriotic lesion. Since the endometriotic foci showed significant LDE uptake, there was likely increased consumption of LDL by these cells, similar to cells in cancers and inflammatory diseases. Plasma cholesterol levels had no influence on LDE uptake, which showed that the direct delivery of the nanoemulsion to target tissues was independent of serum lipoproteins. There were no significant differences in the parameters (p>0.01) because of the small sample size, but the findings were similar to those of previous studies. CONCLUSION Nanotechnology is a promising therapeutic option for surgery and hormonal blockage for deep endometriosis, with a lower complication rate and no systemic side effects.
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Affiliation(s)
- Alessandra Bedin
- Departamento de Ginecologia e Obstetricia, Faculdade de Medicina (FMUSP), Universidade de Sao Paulo, Sao Paulo, SP, BR
- Hospital Israelita Albert Einstein, Sao Paulo, SP, BR
- *Corresponding author. E-mail:
| | - Raul C Maranhão
- Laboratorio de Metabolismo de Lipides, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Elaine R Tavares
- Laboratorio de Metabolismo de Lipides, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Priscila O Carvalho
- Laboratorio de Metabolismo de Lipides, Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Edmund C Baracat
- Departamento de Ginecologia e Obstetricia, Faculdade de Medicina (FMUSP), Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Sérgio Podgaec
- Departamento de Ginecologia e Obstetricia, Faculdade de Medicina (FMUSP), Universidade de Sao Paulo, Sao Paulo, SP, BR
- Hospital Israelita Albert Einstein, Sao Paulo, SP, BR
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Gomes FLT, Maranhão RC, Tavares ER, Carvalho PO, Higuchi ML, Mattos FR, Pitta FG, Hatab SA, Kalil-Filho R, Serrano CV. Regression of Atherosclerotic Plaques of Cholesterol-Fed Rabbits by Combined Chemotherapy With Paclitaxel and Methotrexate Carried in Lipid Core Nanoparticles. J Cardiovasc Pharmacol Ther 2018; 23:561-569. [PMID: 29779420 DOI: 10.1177/1074248418778836] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In previous studies, it was demonstrated that lipid core nanoparticles (LDE) resemble the low-density lipoprotein structure and carrying the antiproliferative agent paclitaxel (PTX) strongly reduced atherosclerosis lesions induced in rabbits by cholesterol feeding. Currently, the aim was to verify whether combining LDE-PTX treatment with methotrexate (MTX) associated with LDE (LDE-MTX) could accelerate the atherosclerosis regression attained with single LDE-PTX treatment, after withdrawing the cholesterol feeding. Thirty-eight rabbits were fed 1% cholesterol chow for 8 weeks. Six of these rabbits were then euthanized for analyses of the aorta (controls). In the remaining rabbits, cholesterol feeding was withdrawn, and those 32 animals were allocated to 3 groups submitted to different 8-week intravenous treatments, all once/week: LDE-PTX (n = 10; 4 mg/kg), LDE-PTX + LDE-MTX (n = 11; 4 mg/kg), and LDE-alone (n = 11). Rabbits were then euthanized and aortas were excised for morphometric, immunohistochemical, and gene expression analyses. After cholesterol feeding withdrawal, in comparison with LDE-alone group, both LDE-PTX and LDE-PTX + LDE-MTX treatments had the ability to increase the regression of plaque areas: -49% in LDE-PTX and -59% for LDE-PTX + LDE-MTX. However, only LDE-PTX + LDE-MTX treatment elicited reduction in the intima area, estimated in -57%. Macrophage presence in aortic lesions was reduced 48% by LDE-PTX and 43% by LDE-PTX + LDE-MTX treatment. Matrix metalloproteinase 9 was reduced by either LDE-PTX (74%) or LDE-PTX + LDE-MTX (78%). Tumor necrosis factor α gene expression was reduced 65% by LDE-PTX and 79% by LDE-PTX + LDE-MTX. In conclusion, treatment with LDE-PTX indeed accelerated plaque reduction after cholesterol feeding; LDE-PTX + LDE-MTX further increased this effect, without any observed toxicity. These results pave the way for the use of combined chemotherapy to achieve stronger effects on aggravated, highly inflamed atherosclerotic lesions.
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Affiliation(s)
- Fernando L T Gomes
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil.,2 Hospital Cassiano Antônio de Moraes, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Raul C Maranhão
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil.,3 Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Elaine R Tavares
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Priscila O Carvalho
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Maria L Higuchi
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Fernando R Mattos
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Fabio G Pitta
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Sergio A Hatab
- 2 Hospital Cassiano Antônio de Moraes, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Roberto Kalil-Filho
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
| | - Carlos V Serrano
- 1 Heart Institute (InCor) of the Medical School Hospital University of São Paulo, São Paulo, Brazil
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Freitas SCMP, Tavares ER, Silva BMO, Meneghini BC, Kalil-Filho R, Maranhão RC. Lipid core nanoparticles resembling low-density lipoprotein and regression of atherosclerotic lesions: effects of particle size. ACTA ACUST UNITED AC 2018. [PMID: 29513883 PMCID: PMC5912096 DOI: 10.1590/1414-431x20177090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Particles are usually polydispersed and size is an important feature for lipid-based drug delivery systems in order to optimize cell-particle interactions as to pharmacologic action and toxicity. Lipid nanoparticles (LDE) with composition similar to that of low-density lipoprotein carrying paclitaxel were shown to markedly reduce atherosclerosis lesions induced in rabbits by cholesterol feeding. The aim of this study was to test whether two LDE fractions, one with small (20-60 nm) and the other with large (60-100 nm) particles, had different actions on the atherosclerotic lesions. The two LDE-paclitaxel fractions, prepared by microfluidization, were separated by density gradient ultracentrifugation and injected (4 mg/body weight, intravenously once a week) into two groups of rabbits previously fed cholesterol for 4 weeks. A group of cholesterol-fed animals injected with saline solution was used as control to assess lesion reduction with treatment. After the treatment period, the animals were euthanized for analysis. After treatment, both the small and large nanoparticle preparations of LDE-paclitaxel had equally strong anti-atherosclerosis action. Both reduced lesion extension in the aorta by roughly 50%, decreased the intima width by 75% and the macrophage presence in the intima by 50%. The two preparations also showed similar toxicity profile. In conclusion, within the 20-100 nm range, size is apparently not an important feature regarding the LDE nanoparticle system and perhaps other solid lipid-based systems.
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Daminelli EN, Fotakis P, Mesquita CH, Maranhão RC, Zannis VI. Tissue Uptake Mechanisms Involved in the Clearance of Non-Protein Nanoparticles that Mimic LDL Composition: A Study with Knockout and Transgenic Mice. Lipids 2017; 52:991-998. [PMID: 29094255 DOI: 10.1007/s11745-017-4306-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/28/2017] [Indexed: 10/18/2022]
Abstract
Lipid core nanoparticles (LDE) resembling LDL behave similarly to native LDL when injected in animals or subjects. In contact with plasma, LDE acquires apolipoproteins (apo) E, A-I and C and bind to LDL receptors. LDE can be used to explore LDL metabolism or as a vehicle of drugs directed against tumoral or atherosclerotic sites. The aim was to investigate in knockout (KO) and transgenic mice the plasma clearance and tissue uptake of LDE labeled with 3H-cholesteryl ether. LDE clearance was lower in LDLR KO and apoE KO mice than in wild type (WT) mice (p < 0.05). However, infusion of human apoE3 into the apoE KO mice increased LDE clearance. LDE clearance was higher in apoA-I KO than in WT. In apoA-I transgenic mice, LDE clearance was lower than in apoA-I KO and than in apoA-I KO infusion with human HDL. Infusion of human HDL into the apoA-I KO mice resulted in higher LDE clearance than in the apoA-I transgenic mice (p < 0.05). In apoA-I KO and apoA-I KO infused human HDL, the liver uptake was greater than in WT animals and apoA-I transgenic animals (p < 0.05). LDE clearance was lower in apoE/A-I KO than in WT. Infusion of human HDL increased LDE clearance in those double KO mice. No difference among the groups in LDE uptake by the tissues occurred. In conclusion, results support LDLR and apoE as the key players for LDE clearance, apoA-I also influences those processes.
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Affiliation(s)
- Elaine N Daminelli
- Heart Institute (InCor) of the Medical School Hospital, FMUSP, University of São Paulo, São Paulo, SP, Brazil.,Departments of Medicine and Biochemistry, Molecular Genetics, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Panagiotis Fotakis
- Departments of Medicine and Biochemistry, Molecular Genetics, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA.,Department of Biochemistry, University of Crete Medical School, Crete, Greece
| | - Carlos H Mesquita
- Heart Institute (InCor) of the Medical School Hospital, FMUSP, University of São Paulo, São Paulo, SP, Brazil
| | - Raul C Maranhão
- Heart Institute (InCor) of the Medical School Hospital, FMUSP, University of São Paulo, São Paulo, SP, Brazil. .,Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil.
| | - Vassilis I Zannis
- Departments of Medicine and Biochemistry, Molecular Genetics, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA.,Department of Biochemistry, University of Crete Medical School, Crete, Greece
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Fiorelli AI, Lourenço-Filho DD, Tavares ER, Carvalho PO, Marques AF, Gutierrez PS, Maranhão RC, Stolf NAG. Methotrexate associated to lipid core nanoparticles improves cardiac allograft vasculopathy and the inflammatory profile in a rabbit heart graft model. ACTA ACUST UNITED AC 2017; 50:e6225. [PMID: 28832763 PMCID: PMC5561808 DOI: 10.1590/1414-431x20176225] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 07/11/2017] [Indexed: 11/25/2022]
Abstract
Coronary allograft vasculopathy is an inflammatory-proliferative process that compromises the long-term success of heart transplantation and has no effective treatment. A lipid nanoemulsion (LDE) can carry chemotherapeutic agents in the circulation and concentrates them in the heart graft. The aim of the study was to investigate the effects of methotrexate (MTX) associated to LDE. Rabbits fed a 0.5% cholesterol diet and submitted to heterotopic heart transplantation were treated with cyclosporine A (10 mg·kg–1·day–1 orally) and allocated to treatment with intravenous LDE-MTX (4 mg/kg, weekly, n=10) or with weekly intravenous saline solution (control group, n=10), beginning on the day of surgery. Animals were euthanized 6 weeks later. Compared to controls, grafts of LDE-MTX treated rabbits showed 20% reduction of coronary stenosis, with a four-fold increase in vessel lumen and 80% reduction of macrophage staining in grafts. Necrosis was attenuated by LDE-MTX. Native hearts of both LDE-MTX and Control groups were apparently normal. Gene expression of lipoprotein receptors was significantly greater in grafts compared to native hearts. In LDE-MTX group, gene expression of the pro-inflammatory factors tumor necrosis factor-α, monocyte chemoattractant protein-1, interleukin-18, vascular cell adhesion molecule-1, and matrix metalloproteinase-12 was strongly diminished whereas expression of anti-inflammatory interleukin-10 increased. LDE-MTX promoted improvement of the cardiac allograft vasculopathy and diminished inflammation in heart grafts.
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Affiliation(s)
- A I Fiorelli
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - D D Lourenço-Filho
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - E R Tavares
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - P O Carvalho
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - A F Marques
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - P S Gutierrez
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - R C Maranhão
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.,Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brasil
| | - N A G Stolf
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Influence of Drugs Carried in Lipid Nanoparticles in Coronary Disease of Rabbit Transplanted Heart. Ann Thorac Surg 2017; 104:577-583. [DOI: 10.1016/j.athoracsur.2016.12.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 11/17/2016] [Accepted: 12/20/2016] [Indexed: 11/19/2022]
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Graziani SR, Vital CG, Morikawa AT, Van Eyll BM, Fernandes Junior HJ, Kalil Filho R, Maranhão RC. Phase II study of paclitaxel associated with lipid core nanoparticles (LDE) as third-line treatment of patients with epithelial ovarian carcinoma. Med Oncol 2017; 34:151. [DOI: 10.1007/s12032-017-1009-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 07/19/2017] [Indexed: 11/29/2022]
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Feio DCA, de Oliveira NCL, Pereira ELR, Morikawa AT, Muniz JAPC, Montenegro RC, Alves APNN, de Lima PDL, Maranhão RC, Burbano RR. Organic effects of associating paclitaxel with a lipid-based nanoparticle system on a nonhuman primate, Cebus apella. Int J Nanomedicine 2017; 12:3827-3837. [PMID: 28572727 PMCID: PMC5441669 DOI: 10.2147/ijn.s129153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Lipid-based nanoparticle systems have been used as vehicles for chemotherapeutic agents in experimental cancer treatments. Those systems have generally been credited with attenuating the severe toxicity of chemotherapeutic agents. This study aimed to investigate the effects of associating paclitaxel (PTX) with a lipid-based nanoparticle system on a nonhuman primate, Cebus apella, documenting the toxicity as measured by serum biochemistry, which is a detailed analysis of blood and tissue. Eighteen C. apella were studied: three animals were treated with cholesterol-rich nanoemulsion (LDE) only, without PTX, administered intravenously every 3 weeks, during six treatment cycles; six animals were treated with PTX associated with LDE at the same administration scheme, three with lower (175 mg/m2) and three with higher (250 mg/m2) PTX doses; and six animals were treated with commercial PTX, three with the lower and three with the higher doses. In the LDE-PTX group, no clinical toxicity appeared, and the weight-food consumption curve was similar to that of the controls. Two animals treated with commercial PTX presented weight loss, nausea and vomiting, diarrhea, skin flaking, 70% loss of body hair, and decreased physical activity. The use of LDE as a carrier at both lower and higher doses reduced the toxicity of the drug in this species, which is closely related to human subjects. This was observed not only by clinical, biochemical, and hematological profiles but also by the histopathological analysis. The results of this study support the assumption that lipid-based nanoparticle systems used as drug carriers can serve as valuable tools to decrease the toxicity and increase the safety of chemotherapeutic agents.
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Affiliation(s)
| | | | | | | | | | | | | | - Patrícia Danielle Lima de Lima
- Molecular Biology Laboratory, Post Graduate Program of Amazon Parasitic Biology, Biological and Health Sciences Center, State University of Pará, Belem, Brazil
| | | | - Rommel Rodríguez Burbano
- Human Cytogenetics Laboratory, Institute of Biological Sciences, Federal University of Pará, Belem
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16
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D Lima A, Hua N, C Maranhão R, A Hamilton J. Evaluation of atherosclerotic lesions in cholesterol-fed mice during treatment with paclitaxel in lipid nanoparticles: a magnetic resonance imaging study. J Biomed Res 2017; 31:116-121. [PMID: 28808193 PMCID: PMC5445214 DOI: 10.7555/jbr.31.20160123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Cholesterol-core nanoparticles (LDE) have been shown to be recognized by low-density lipoprotein receptors (LDLR) after administration; therefore, LDE is an ideal vehicle to deliver drug with targeting property. Paclitaxel, when incorporated into LDE, promotes atherosclerosis regression with reduced drug toxicity in rabbits through LDLR. Here, we tested whether LDE-paclitaxel could still be effective in reducing diet-induced atherosclerosis in a mouse model without LDLR. Nineteen LDLR knockout male mice were fed 1% cholesterol for 12 weeks. Then, 12 animals received 4-weekly intraperitoneal LDE-paclitaxel (4 mg/kg) while 7 controls received saline solution. On week 12 and 16, in vivo MRI of the aortic roots was performed. Aorta macroscopy was made after euthanasia. Reduction of atherosclerotic lesions was observed. LDE-paclitaxel treatment resulted in reduction of wall area (14%) and stenosis (22%) by MRI and 33% by macroscopy. Thus, LDE-paclitaxel may produce pharmacological effects through LDE uptake by mechanisms other than LDLR.
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Affiliation(s)
- Aline D Lima
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, S?o Paulo, Brazil.,Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Ning Hua
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Raul C Maranhão
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, S?o Paulo, Brazil
| | - James A Hamilton
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
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Nanoemulsion: Concepts, development and applications in drug delivery. J Control Release 2017; 252:28-49. [PMID: 28279798 DOI: 10.1016/j.jconrel.2017.03.008] [Citation(s) in RCA: 599] [Impact Index Per Article: 85.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/03/2017] [Accepted: 03/04/2017] [Indexed: 01/07/2023]
Abstract
Nanoemulsions are biphasic dispersion of two immiscible liquids: either water in oil (W/O) or oil in water (O/W) droplets stabilized by an amphiphilic surfactant. These come across as ultrafine dispersions whose differential drug loading; viscoelastic as well as visual properties can cater to a wide range of functionalities including drug delivery. However there is still relatively narrow insight regarding development, manufacturing, fabrication and manipulation of nanoemulsions which primarily stems from the fact that conventional aspects of emulsion formation and stabilization only partially apply to nanoemulsions. This general deficiency sets up the premise for current review. We attempt to explore varying intricacies, excipients, manufacturing techniques and their underlying principles, production conditions, structural dynamics, prevalent destabilization mechanisms, and drug delivery applications of nanoemulsions to spike interest of those contemplating a foray in this field.
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Maranhão RC, Vital CG, Tavoni TM, Graziani SR. Clinical experience with drug delivery systems as tools to decrease the toxicity of anticancer chemotherapeutic agents. Expert Opin Drug Deliv 2017; 14:1217-1226. [PMID: 28042707 DOI: 10.1080/17425247.2017.1276560] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The toxicity of chemotherapeutic agents, resulting from their low pharmacological index, introduces considerable discomfort and risk to cancer patients. Among several strategies to reduce the toxicity of chemotherapeutic agents, targeted drug delivery is the most promising one. Areas covered: Liposomes, micelles, albumin-based, polymeric, dendritic and lipid core nanoparticles have been used as carriers to concentrate anticancer drugs in neoplastic tissues, and clinical studies of those preparations are reviewed. In most clinical studies, drug delivery systems reduced drug toxicity. Lipid core nanoparticles (LDE) that bind to cell lipoprotein receptors have the ability to concentrate in neoplastic tissues and were the first artificial non-liposomal system shown in in vivo studies to possess targeting properties. The toxicity reduction achieved by LDE as vehicle of carmustine, etoposide and paclitaxel was singularly strong. Expert opinion: The reduced toxicity offered by drug delivery systems has expanded treatment population that may benefit from chemotherapy including feeble, overtreated and elderly patients that would otherwise be offered palliative therapy. Drug delivery systems may either prolong the duration of treatments or allow increases in drug dose.
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Affiliation(s)
- Raul C Maranhão
- a Heart Institute of the Medical School Hospital , University of São Paulo , São Paulo , Brazil.,b Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Carolina G Vital
- a Heart Institute of the Medical School Hospital , University of São Paulo , São Paulo , Brazil.,b Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Thauany M Tavoni
- a Heart Institute of the Medical School Hospital , University of São Paulo , São Paulo , Brazil.,b Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Silvia R Graziani
- a Heart Institute of the Medical School Hospital , University of São Paulo , São Paulo , Brazil
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Reduction of Atherosclerotic Lesions by the Chemotherapeutic Agent Carmustine Associated to Lipid Nanoparticles. Cardiovasc Drugs Ther 2016; 30:433-443. [DOI: 10.1007/s10557-016-6675-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Kretzer IF, Maria DA, Guido MC, Contente TC, Maranhão RC. Simvastatin increases the antineoplastic actions of paclitaxel carried in lipid nanoemulsions in melanoma-bearing mice. Int J Nanomedicine 2016; 11:885-904. [PMID: 27022257 PMCID: PMC4788363 DOI: 10.2147/ijn.s88546] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
PURPOSE Lipid nanoemulsions (LDEs) that bind to low-density lipoprotein (LDL) receptors used as carriers of paclitaxel (PTX) can decrease toxicity and increase PTX antitumoral action. The administration of simvastatin (Simva), which lowers LDL-cholesterol, was tested as an adjuvant to commercial PTX and to PTX associated with LDE (LDE-PTX). MATERIALS AND METHODS B16F10 melanoma-bearing mice were treated with saline solution or LDE (controls), Simva, PTX, PTX and Simva, LDE-PTX, and LDE-PTX and Simva: PTX dose 17.5 μmol/kg (three intraperitoneal injections, 3 alternate days): Simva 50 mg/kg/day by gavage, 9 consecutive days. RESULTS Compared with saline controls, 95% tumor-growth inhibition was achieved by LDE-PTX and Simva, 61% by LDE-PTX, 44% by PTX and Simva, and 43% by PTX. Simva alone had no effect. Metastasis developed in only 37% of the LDE-PTX and Simva, 60% in LDE-PTX, and 90% in PTX and Simva groups. Survival rates were higher in LDE-PTX and Simva and in LDE-PTX groups. The LDE-PTX and Simva group presented tumors with reduced cellular density and increased collagen fibers I and III. Tumors from all groups showed reduction in immunohistochemical expression of ICAM, MCP-1, and MMP-9; LDE-PTX and Simva presented the lowest MMP-9 expression. Expression of p21 was increased in the Simva, LDE-PTX, and LDE-PTX and Simva groups. In the Simva and LDE-PTX and Simva groups, expression of cyclin D1, a proliferation and survival promoter of tumor cells, was decreased. Therapy with LDE-PTX and Simva showed negligible toxicity compared with PTX and Simva, which resulted in weight loss and myelosuppression. CONCLUSION Simva increased the antitumor activity of PTX carried in LDE but not of PTX commercial presentation, possibly because statins increase the expression of LDL receptors that internalize LDE-PTX.
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Affiliation(s)
- Iara F Kretzer
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, University of São Paulo, São Paulo, Brazil; Department of Clinical Chemistry, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Durvanei A Maria
- Biochemistry and Biophysics Laboratories, Butantan Institute, São Paulo, Brazil
| | - Maria C Guido
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, University of São Paulo, São Paulo, Brazil
| | - Thaís C Contente
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, University of São Paulo, São Paulo, Brazil
| | - Raul C Maranhão
- Laboratory of Metabolism and Lipids, Heart Institute of the Medical School Hospital, University of São Paulo, São Paulo, Brazil; Department of Clinical Chemistry, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Mello SBV, Tavares ER, Guido MC, Bonfá E, Maranhão RC. Anti-inflammatory effects of intravenous methotrexate associated with lipid nanoemulsions on antigen-induced arthritis. Clinics (Sao Paulo) 2016; 71:54-8. [PMID: 26872084 PMCID: PMC4732406 DOI: 10.6061/clinics/2016(01)09] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 11/12/2015] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To test the hypothesis that intravenous use of methotrexate associated with lipid nanoemulsions can achieve superior anti-inflammatory effects in the joints of rabbits with antigen-induced arthritis compared with commercial methotrexate. METHODS Arthritis was induced in New Zealand rabbits sensitized with methylated bovine serum albumin and subsequently intra-articularly injected with the antigen. A nanoemulsion of methotrexate labeled with 3H-cholesteryl ether (4 mg/kg methotrexate) was then intravenously injected into four rabbits to determine the plasma decaying curves and the biodistribution of the methotrexate nanoemulsion by radioactive counting. Additionally, the pharmacokinetics of the methotrexate nanoemulsion were determined by high-pressure liquid chromatography. Twenty-four hours after arthritis induction, the animals were allocated into three groups, with intravenous injection with saline solution (n=9), methotrexate nanoemulsion (0.5 µmol/kg methotrexate, n=7), or commercial methotrexate (0.5 µmol/kg, n=4). The rabbits were sacrificed 24 h afterward. Synovial fluid was then collected for protein leakage and cell content analyses and synovial membranes were collected for histopathological analysis. RESULTS The methotrexate nanoemulsion was taken up mainly by the liver and the uptake by arthritic joints was two-fold greater than that by control joints. The methotrexate nanoemulsion treatment reduced leukocyte influx into the synovial fluid by nearly 65%; in particular, mononuclear and polymorphonuclear cells were reduced by 47 and 72%, respectively. In contrast, cell influx was unaffected following treatment with commercial methotrexate. Protein leakage into the arthritic knees of the rabbits was also more limited following methotrexate nanoemulsion treatment than following commercial methotrexate treatment. CONCLUSIONS The intravenous methotrexate nanoemulsion showed anti-inflammatory effects on the synovia of arthritic joints that were clearly superior to the effects of a commercial methotrexate preparation. This result is conceivably due to greater methotrexate uptake by the joints when the drug is associated with a nanoemulsion.
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Affiliation(s)
- Suzana B V Mello
- />Instituto do Coração (InCor), Faculdade de Medicina da Universidade de São Paulo
| | | | | | - Eloisa Bonfá
- />Instituto do Coração (InCor), Faculdade de Medicina da Universidade de São Paulo
| | - Raul C Maranhão
- Divisão de Reumatologia
- Laboratório de Metabolismo de Lipídios, São Paulo/, SP, Brazil
- corresponding author E-mail:
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Use of combined chemotherapy with etoposide and methotrexate, both associated to lipid nanoemulsions for atherosclerosis treatment in cholesterol-fed rabbits. Cardiovasc Drugs Ther 2015; 29:15-22. [PMID: 25672520 DOI: 10.1007/s10557-014-6566-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE Treatment of atherosclerotic rabbits with intravenous methotrexate or etoposide carried in lipid nanoemulsions (LDE) markedly reduced the lesions in the aorta. Here, the combined treatment with LDE-methotrexate and LDE-etoposide was investigated aiming to increase the anti-atherosclerosis effect. METHODS Thirty-six male rabbits received a diet with 1 % cholesterol for 2 months. After the first month, the animals received 4 weekly intravenous injections of LDE-methotrexate (4 mg/kg dose), LDE-etoposide (6 mg/kg), or a combination of those two drugs, while the control animals were injected with LDE (n = 9 for each group). RESULTS LDE-methotrexate+LDE-etoposide reduced aortic lesion areas by 95 % compared with controls and the intima-media ratio was reduced five-fold, whereas LDE-methotrexate reduced the lesions by 81 % and LDE-etoposide by 83 %. Compared to controls, the positive area of macrophages and MMP-9 in the arterial intima was significantly reduced in all treated groups (p < 0.001), but the MMP9 reduction was greater with the combined chemotherapy than the reduction achieved by the isolated treatments. Presence of CD3 positive cells was equal in controls and LDE-methotrexate+LDE-etoposide treated animals. However, FOXP3 positive T lymphocytes in the intima were increased in the LDE-methotrexate+LDE-etoposide rabbits. Weight, food intake evolution and the hematologic parameters suggested that the treatment had very low toxicity. CONCLUSIONS Compared to the single treatments with LDE-methotrexate and LDE-etoposide, the combined treatment was more effective in reducing the atherosclerotic lesions. Because the toxicity of the novel drug-target combined scheme was low, those results favor the possibility of future clinical studies in patients with cardiovascular disease.
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Maranhão RC, Tavares ER. Advances in non-invasive drug delivery for atherosclerotic heart disease. Expert Opin Drug Deliv 2015; 12:1135-47. [DOI: 10.1517/17425247.2015.999663] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Ganta S, Talekar M, Singh A, Coleman TP, Amiji MM. Nanoemulsions in translational research-opportunities and challenges in targeted cancer therapy. AAPS PharmSciTech 2014; 15:694-708. [PMID: 24510526 DOI: 10.1208/s12249-014-0088-9] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 01/17/2014] [Indexed: 12/29/2022] Open
Abstract
Nanoemulsion dosage form serves as a vehicle for the delivery of active pharmaceutical ingredients and has attracted great attention in drug delivery and pharmacotherapy. In particular, nanoemulsions act as an excellent vehicle for poorly aqueous soluble drugs, which are otherwise difficult to formulate in conventional dosage forms. Nanoemulsions are submicron emulsions composed of generally regarded as safe grade excipients. Particle size at the nanoscale and larger surface area lead to some very interesting physical properties that can be exploited to overcome anatomical and physiological barriers associated in drug delivery to the complex diseases such as cancer. Along these lines, nanoemulsions have been engineered with specific attributes such as size, surface charge, prolonged blood circulation, target specific binding ability, and imaging capability. These attributes can be tuned to assist in delivering drug/imaging agents to the specific site of interest, based on active and passive targeting mechanisms. This review focuses on the current state of nanoemulsions in the translational research and its role in targeted cancer therapy. In addition, the production, physico-chemical characterization, and regulatory aspects of nanoemulsion are addressed.
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Lucas SRR, Maranhão RC, Guerra JL, Coelho BMP, Barboza R, Pozzi DHB. Pilot clinical study of carmustine associated with a lipid nanoemulsion in combination with vincristine and prednisone for the treatment of canine lymphoma. Vet Comp Oncol 2013; 13:184-93. [DOI: 10.1111/vco.12033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 01/11/2013] [Accepted: 02/15/2013] [Indexed: 12/01/2022]
Affiliation(s)
- S. R. R. Lucas
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science; University of São Paulo; São Paulo Brazil
| | - R. C. Maranhão
- Lipid Metabolism Laboratory, Heart Institute (InCor), Medical School Hospital; University of São Paulo; São Paulo Brazil
- Department of Clinical Biochemistry, Faculty of Pharmaceutical Sciences; University of São Paulo; São Paulo Brazil
| | - J. L. Guerra
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science; University of São Paulo; São Paulo Brazil
| | - B. M. P. Coelho
- Department of Clinical Medicine, Medical School Hospital; University of São Paulo; São Paulo Brazil
| | - R. Barboza
- Lipid Metabolism Laboratory, Heart Institute (InCor), Medical School Hospital; University of São Paulo; São Paulo Brazil
| | - D. H. B. Pozzi
- Department of Clinical Medicine, Medical School Hospital; University of São Paulo; São Paulo Brazil
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Mello SBV, Tavares ER, Bulgarelli A, Bonfá E, Maranhão RC. Intra-articular methotrexate associated to lipid nanoemulsions: anti-inflammatory effect upon antigen-induced arthritis. Int J Nanomedicine 2013; 8:443-9. [PMID: 23439784 PMCID: PMC3576886 DOI: 10.2147/ijn.s29392] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective Commercial methotrexate formulations (MTX) have poor anti-inflammatory action for intra-articular treatment of rheumatoid arthritis. Our aim was to investigate whether an association between methotrexate and lipidic nanoemulsions (LDE) could improve MTX intra-articular action. Methods For its association to LDE, MTX was previously esterified with dodecyl bromide. LDE-MTX was prepared by high pressure homogenization. Antigen-induced arthritis (AIA) was achieved in rabbits sensitized with methylated bovine serum albumin, and the rabbits were subsequently intra-articularly injected with the antigen. Twenty-four hours after AIA induction, groups of four to nine rabbits were intra-articularly injected with increasing doses (0.0625–0.5 μmol/kg) of LDE-MTX, and were compared to treatment with 0.5 μmol/kg commercial MTX, LDE alone, and saline (controls). Synovial fluid was collected 48 hours after AIA induction for analysis of protein leakage and cell content. Synovial membranes were collected for histopathology. Uptake of LDE labeled with 3H-cholesteryl ether by the synovial tissue was also determined. Results Uptake of radioactive LDE by arthritic joints was 2.5-fold greater than by normal joints. Treatment with intra-articular LDE-MTX elicited a clear dose response pattern by reducing the synovial leukocyte infiltrate (P = 0.004) and protein leakage (P = 0.032) when compared with arthritic non-treated joints. In contrast, the intra-articular injection of commercial MTX and LDE did not reduce leukocyte infiltrate or protein leakage. Toxicity to treatment was not observed in any of the animals. Conclusion The association between LDE and MTX presented a marked anti-inflammatory effect that was absent after intra-articular commercial MTX treatment. Therefore, the new formulation is a candidate for future clinical studies.
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Affiliation(s)
- Suzana B V Mello
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Assumpção JUCV, Campos ML, Ferraz Nogueira Filho MA, Pestana KC, Baldan HM, Formariz Pilon TP, de Oliveira AG, Peccinini RG. Biocompatible microemulsion modifies the pharmacokinetic profile and cardiotoxicity of doxorubicin. J Pharm Sci 2012; 102:289-96. [PMID: 23150468 DOI: 10.1002/jps.23368] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/22/2012] [Accepted: 10/19/2012] [Indexed: 11/11/2022]
Abstract
Doxorubicin (DOX) is an anthracycline antibiotic with a broad antitumor spectrum. However, the clinical use of DOX is limited because of its cardiotoxicity, a dose-dependent effect. Colloidal drug delivery systems, such as microemulsions (MEs), allow the incorporation of drugs, modifying the pharmacokinetic (PK) profile and toxic effects. In this study, we evaluated the PK profile and cardiotoxicity of a new DOX ME (DOX-ME). The PK profile of DOX-ME was determined and compared with that of the conventional DOX after single-dose administration (6 mg/kg, intravenous) in male Wistar rats (n = 12 per group). The cardiotoxicity of DOX formulations was evaluated by serum creatine kinase MB (CKMB) activity in both animal groups before and after drug administration. The plasma DOX measurements were performed by high-performance liquid chromatography with fluorescence detection, and the CKMB levels were assayed using the CKMB Labtest® kit. The ME system showed a significant increase in plasma DOX concentrations and lower distribution volume when compared with conventional DOX. Serum CKMB activity increased after conventional DOX administration but was unchanged in the DOX-ME group. These results demonstrate modifications in drug access to susceptible sites using DOX-ME. DOX-ME displayed features that make it a promising system for future therapeutic application.
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Kretzer IF, Maria DA, Maranhão RC. Drug-targeting in combined cancer chemotherapy: tumor growth inhibition in mice by association of paclitaxel and etoposide with a cholesterol-rich nanoemulsion. Cell Oncol (Dordr) 2012; 35:451-60. [DOI: 10.1007/s13402-012-0104-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2012] [Indexed: 01/29/2023] Open
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Occhiutto ML, Freitas FR, Maranhao RC, Costa VP. Breakdown of the blood-ocular barrier as a strategy for the systemic use of nanosystems. Pharmaceutics 2012; 4:252-75. [PMID: 24300231 PMCID: PMC3834913 DOI: 10.3390/pharmaceutics4020252] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 04/17/2012] [Accepted: 05/05/2012] [Indexed: 12/14/2022] Open
Abstract
Several drug delivery systems have been proposed to overcome physiological barriers, improving ocular bioavailability. Systemic routes are seldom used due to the blood-ocular barrier. Novel drug delivery systems based on nanotechnology techniques have been developed to overcome ocular physiological barriers. This non-systematic review suggests the utilization of a transitory blood-ocular breakdown to allow the access of drugs by nanotechnology drug delivery systems via the systemic route. We discuss the possible ways to cause the breakdown of the blood-ocular barrier: acute inflammation caused by intraocular surgery, induced ocular hypotony, and the use of inflammatory mediators. The suitability of use of the systemic route and its toxic effects are also discussed in this article.
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Affiliation(s)
- Marcelo L. Occhiutto
- Heart Institute, Medical School Hospital, University of São Paulo, São Paulo 05403-000, Brazil; (M.L.O.); (F.R.F.); (R.C.M.)
| | - Fatima R. Freitas
- Heart Institute, Medical School Hospital, University of São Paulo, São Paulo 05403-000, Brazil; (M.L.O.); (F.R.F.); (R.C.M.)
| | - Raul C. Maranhao
- Heart Institute, Medical School Hospital, University of São Paulo, São Paulo 05403-000, Brazil; (M.L.O.); (F.R.F.); (R.C.M.)
- Faculty of Pharmaceutical Science, University of São Paulo, São Paulo 05508-000, Brazil
| | - Vital P. Costa
- Department of Ophthalmology, University of Campinas, Campinas, São Paulo 13083-887, Brazil
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Pires LA, Hegg R, Freitas FR, Tavares ER, Almeida CP, Baracat EC, Maranhão RC. Effect of neoadjuvant chemotherapy on low-density lipoprotein (LDL) receptor and LDL receptor-related protein 1 (LRP-1) receptor in locally advanced breast cancer. Braz J Med Biol Res 2012; 45:557-64. [PMID: 22570085 PMCID: PMC3854302 DOI: 10.1590/s0100-879x2012007500068] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Accepted: 03/26/2012] [Indexed: 11/22/2022] Open
Abstract
Low-density lipoprotein (LDL) receptors are overexpressed in most neoplastic cell lines and provide a mechanism for the internalization and concentration of drug-laden nanoemulsions that bind to these receptors. The aim of the present study was to determine whether the administration of standard chemotherapeutic schemes can alter the expression of LDL and LDL receptor-related protein 1 (LRP-1) receptors in breast carcinoma. Fragments of tumoral and normal breast tissue from 16 consecutive volunteer women with breast cancer in stage II or III were obtained from biopsies before the beginning of neoadjuvant chemotherapy and after chemotherapy, from fragments excised during mastectomy. Tissues were analyzed by immunohistochemistry for both receptors. Because complete response to treatment was achieved in 4 patients, only the tumors from 12 were analyzed. Before chemotherapy, there was overexpression of LDL receptor in the tumoral tissue compared to normal breast tissue in 8 of these patients. LRP-1 receptor overexpression was observed in tumors of 4 patients. After chemotherapy, expression of both receptors decreased in the tumors of 6 patients, increased in 4 and was unchanged in 2. Nonetheless, even when chemotherapy reduced receptors expression, the expression was still above normal. The fact that chemotherapy does not impair LDL receptors expression supports the use of drug carrier systems that target neoplastic cells by the LDL receptor endocytic pathway in patients on conventional chemotherapy.
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Affiliation(s)
- L A Pires
- Laboratório de Metabolismo de Lípides, Instituto do Coração, Faculdade de Medicina, Hospital das Clínicas, Universidade de São Paulo, Brasil
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Lourenço-Filho DD, Maranhão RC, Méndez-Contreras CA, Tavares ER, Freitas FR, Stolf NA. An artificial nanoemulsion carrying paclitaxel decreases the transplant heart vascular disease: A study in a rabbit graft model. J Thorac Cardiovasc Surg 2011; 141:1522-8. [DOI: 10.1016/j.jtcvs.2010.08.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 07/14/2010] [Accepted: 08/08/2010] [Indexed: 10/18/2022]
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Almeida CP, Vital CG, Contente TC, Maria DA, Maranhão RC. Modification of composition of a nanoemulsion with different cholesteryl ester molecular species: effects on stability, peroxidation, and cell uptake. Int J Nanomedicine 2010; 5:679-86. [PMID: 20957219 PMCID: PMC2948947 DOI: 10.2147/ijn.s12293] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Indexed: 12/04/2022] Open
Abstract
Purpose: Use of lipid nanoemulsions as carriers of drugs for therapeutic or diagnostic purposes has been increasingly studied. Here, it was tested whether modifications of core particle constitution could affect the characteristics and biologic properties of lipid nanoemulsions. Methods: Three nanoemulsions were prepared using cholesteryl oleate, cholesteryl stearate, or cholesteryl linoleate as main core constituents. Particle size, stability, pH, peroxidation of the nanoemulsions, and cell survival and uptake by different cell lines were evaluated. Results: It was shown that cholesteryl stearate nanoemulsions had the greatest particle size and all three nanoemulsions were stable during the 237-day observation period. The pH of the three nanoemulsion preparations tended to decrease over time, but the decrease in pH of cholesteryl stearate was smaller than that of cholesteryl oleate and cholesteryl linoleate. Lipoperoxidation was greater in cholesteryl linoleate than in cholesteryl oleate and cholesteryl stearate. After four hours’ incubation of human umbilical vein endothelial cells (HUVEC) with nanoemulsions, peroxidation was minimal in the presence of cholesteryl oleate and more pronounced with cholesteryl linoleate and cholesteryl stearate. In contrast, macrophage incubates showed the highest peroxidation rates with cholesteryl oleate. Cholesteryl linoleate induced the highest cell peroxidation rates, except in macrophages. Uptake of cholesteryl oleate nanoemulsion by HUVEC and fibroblasts was greater than that of cholesteryl linoleate and cholesteryl stearate. Uptake of the three nanoemulsions by monocytes was equal. Uptake of cholesteryl oleate and cholesteryl linoleate by macrophages was negligible, but macrophage uptake of cholesteryl stearate was higher. In H292 tumor cells, cholesteryl oleate showed the highest uptakes. HUVEC showed higher survival rates when incubated with cholesteryl stearate and smaller survival with cholesteryl linoleate. H292 survival was greater with cholesteryl stearate. Conclusion: Although all three nanoemulsion types were stable for a long period, considerable differences were observed in size, oxidation status, and cell survival and nanoemulsion uptake in all tested cell lines. Those differences may be helpful in protocol planning and interpretation of data from experiments with lipid nanoemulsions.
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Affiliation(s)
- Cristina P Almeida
- Lipid Metabolism Laboratory, Heart Institute (InCor), Medical School Hospital, University of São Paulo, São Paulo, Brazil
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Valduga CJ, Fernandes DC, Lo Prete AC, Azevedo CHM, Rodrigues DG, Maranhão RC. Use of a cholesterol-rich microemulsion that binds to low-density lipoprotein receptors as vehicle for etoposide. J Pharm Pharmacol 2010; 55:1615-22. [PMID: 14738586 DOI: 10.1211/0022357022232] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
A cholesterol-rich microemulsion (LDE) that binds to low-density lipoprotein (LDL) receptors is selectively taken up by malignant cells that overexpress those receptors and may be used as vehicle for antineoplastic agents. This study aimed to develop the association of etoposide with LDE. It was firstly observed that etoposide poorly associates with the microemulsion, therefore the experiments were performed with a lipophilic fatty acid derivative of the drug. The association of etoposide oleate with LDE was almost 100% and was tested for physical and chemical stability, as well as for cellular uptake, toxicity in mice and cytotoxic activity against a neoplastic cell line (NCI-H292). Uptake and cytotoxic activity of LDE-etoposide oleate by NCI-H292 cells was mediated by LDL receptors. The anti-proliferative activity of LDE-etoposide oleate against the neoplastic cells was smaller than that of etoposide oleate (IC50 (drug concentration required to inhibit 50% of the cell growth) = 0.48 and 0.19 mm, respectively). This difference, however, can be ascribed to the activity of the commercially used vehicle and not the drug itself because when this vehicle was added to the cultures with LDE-etoposide oleate, the IC50 decreased. On the other hand, the tolerability of LDE-etoposide oleate to mice was remarkable, such that its lethal dose (LD50) was about five-fold that of the commercial formulation (LD50=315 and 58 mg kg−1, respectively). In conclusion, LDE-etoposide oleate association is stable and the cytostatic activity of the drug is preserved while its toxicity to animals is small. By diminishing the side effects and directing etoposide to neoplastic tissues, LDE may be regarded as an advance in chemotherapy with this drug.
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Affiliation(s)
- Claudete J Valduga
- Lipid Metabolism Laboratory, the Heart Institute (InCor) of the Medical School Hospital, São Paulo, Brazil
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Teixeira RS, Valduga CJ, Benvenutti LA, Schreier S, Maranhão RC. Delivery of daunorubicin to cancer cells with decreased toxicity by association with a lipidic nanoemulsion that binds to LDL receptors. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.60.10.0004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
A lipidic nanoemulsion termed LDE concentrates in neoplastic cells after injection into the bloodstream and thus can be used as a drug carrier to tumour sites. The chemotherapeutic agent daunorubicin associates poorly with LDE; the aim of this study was to clarify whether the derivatization of daunorubicin by the attachment of an oleyl group increases the association with LDE, and to test the cytotoxicity and animal toxicity of the new preparation. The association of oleyldaunorubicin (oDNR) to LDE showed high yield (93 ± 2% and 84 ± 4% at 1:10 and 1:5 drug:lipid mass, respectively) and was stable for at least 20 days. Association with oDNR increased the LDE particle diameter from 42 ± 4 nm to 75 ± 6 nm. Cytotoxicity of LDE-oDNR was reduced two-fold in HL-60 and K-562 cell lines, fourteen-fold in B16 cells and nine-fold in L1210 cells when compared with commercial daunorubicin. When tested in mice, LDE-oDNR showed remarkable reduced toxicity (maximum tolerated dose > 253 μmol kg−1, compared with <3 μmol kg−1 for commercial daunorubicin). At high doses, the cardiac tissue of LDE-oDNR-treated animals had much smaller structural lesions than with commercial daunorubicin. LDE-oDNR is therefore a promising new preparation that may offer superior tolerability compared with commercial daunorubicin.
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Affiliation(s)
- Raquel S Teixeira
- Lipid Metabolism and Pathology Laboratories, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Claudete J Valduga
- Lipid Metabolism and Pathology Laboratories, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Luis A Benvenutti
- Lipid Metabolism and Pathology Laboratories, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Shirley Schreier
- Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Raul C Maranhão
- Lipid Metabolism and Pathology Laboratories, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
- Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Dantas SA, Ficker ES, Vinagre CGC, Ianni BM, Maranhão RC, Mady C. Metabolism of a lipid nanoemulsion resembling low-density lipoprotein in patients with grade iii obesity. Clinics (Sao Paulo) 2010; 65:23-7. [PMID: 20126342 PMCID: PMC2815278 DOI: 10.1590/s1807-59322010000100005] [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] [Received: 07/21/2009] [Accepted: 10/11/2009] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Obesity increases triglyceride levels and decreases high-density lipoprotein concentrations in plasma. Artificial emulsions resembling lipidic plasma lipoprotein structures have been used to evaluate low-density lipoprotein metabolism. In grade III obesity, low density lipoprotein metabolism is poorly understood. OBJECTIVE To evaluate the kinetics with which a cholesterol-rich emulsion (called a low-density emulsion) binds to low-density lipoprotein receptors in a group of patients with grade III obesity by the fractional clearance rate. METHODS A low-density emulsion was labeled with [(14)C]-cholesterol ester and [(3)H]-triglycerides and injected intravenously into ten normolipidemic non-diabetic patients with grade III obesity [body mass index higher than 40 kg/m(2)] and into ten non-obese healthy controls. Blood samples were collected over 24 hours to determine the plasma decay curve and to calculate the fractional clearance rate. RESULTS There was no difference regarding plasma levels of total cholesterol or low-density lipoprotein cholesterol between the two groups. The fractional clearance rate of triglycerides was 0.086 +/- 0.044 in the obese group and 0.122 +/- 0.026 in the controls (p = 0.040), and the fractional clearance rate of cholesterol ester (h(-1)) was 0.052 +/- 0.021 in the obese subjects and 0.058 +/- 0.015 (p = 0.971) in the controls. CONCLUSION Grade III obese subjects exhibited normal low-density lipoprotein removal from plasma as tested by the nanoemulsion method, but triglyceride removal was slower.
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Affiliation(s)
- Simone Alves Dantas
- Unidade Clínica de Miocardiopatias - Instituto do Coração - Hospital das Clinicas, Faculdade de Medicina da Universidade de São Paulo,São Paulo/SP,Brazil.
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36
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Mendes S, Graziani S, Vitório T, Padoveze A, Hegg R, Bydlowski S, Maranhão R. Uptake by breast carcinoma of a lipidic nanoemulsion after intralesional injection into the patients: A new strategy for neoadjuvant chemotherapy. Gynecol Oncol 2009; 112:400-4. [DOI: 10.1016/j.ygyno.2008.10.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 10/16/2008] [Accepted: 10/25/2008] [Indexed: 10/21/2022]
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Su J, Zhang N, Ho PC. Evaluation of the pharmacokinetics of all-trans-retinoic acid (ATRA) in Wistar rats after intravenous administration of ATRA loaded into tributyrin submicron emulsion and its cellular activity on caco-2 and HepG2 cell lines. J Pharm Sci 2008; 97:2844-53. [PMID: 17879972 DOI: 10.1002/jps.21193] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The pharmacokinetics of all-trans-retinoic acid (ATRA), an anti-cancer drug was highly variable due to its poor aqueous solubility. In this study, we investigated the pharmacokinetics of ATRA in male Wistar rats following intravenous administration of the ATRA loaded tributyrin emulsion. In vitro, the ATRA emulsion was proved binding to apolipoprotein(s). In vivo, the clearance of ATRA was significantly reduced by formulating into the tributyrin emulsion, leading to higher AUCs. Co-administration with 17alpha-ethynylestradiol, a compound known to upregulate the activity of low-density lipoprotein receptors in tissues, significantly increased the K(e), V, and CL of ATRA. The variation of plasma AUCs after administering the ATRA emulsion to the healthy rats was two times less than that after the ATRA solution. The IC(50) in ATRA of the ATRA emulsion for the Caco-2 carcinoma cells was 3.8 microg/mL lower than 6 microg/mL of the ATRA solution. The IC(50) of the emulsion for the HepG2 carcinoma cells was 2.8 microg/mL, while IC(50) was not achieved with the ATRA solution over the test concentration range. The finding indicated that the tributyrin emulsion could be used as a carrier for ATRA and enhances the drug effect by reducing the clearance and increasing the in vitro activity.
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Affiliation(s)
- Jie Su
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
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Maranhão RC, Tavares ER, Padoveze AF, Valduga CJ, Rodrigues DG, Pereira MD. Paclitaxel associated with cholesterol-rich nanoemulsions promotes atherosclerosis regression in the rabbit. Atherosclerosis 2008; 197:959-66. [DOI: 10.1016/j.atherosclerosis.2007.12.051] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Revised: 11/22/2007] [Accepted: 12/14/2007] [Indexed: 11/24/2022]
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Use of cholesterol-rich nanoparticles that bind to lipoprotein receptors as a vehicle to paclitaxel in the treatment of breast cancer: pharmacokinetics, tumor uptake and a pilot clinical study. Cancer Chemother Pharmacol 2008; 63:281-7. [DOI: 10.1007/s00280-008-0738-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Accepted: 03/10/2008] [Indexed: 11/26/2022]
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40
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Vinagre CGC, Ficker ES, Finazzo C, Alves MJN, de Angelis K, Irigoyen MC, Negrão CE, Maranhão RC. Enhanced removal from the plasma of LDL-like nanoemulsion cholesteryl ester in trained men compared with sedentary healthy men. J Appl Physiol (1985) 2007; 103:1166-71. [PMID: 17626830 DOI: 10.1152/japplphysiol.01176.2006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to evaluate the effects of exercise training on plasma removal of a cholesterol-rich nanoemulsion (LDE) that mimics low-density lipoprotein (LDL) lipid structure and binds to LDL receptors. LDE-derived cholesteryl ester plasma kinetics was studied in 24 exercise-trained and 20 sedentary male subjects. LDE labeled with [14C]cholesteryl ester was injected intravenously, and plasma samples were collected over a 24-h period to determine radioisotope decay curves. LDL cholesterol concentration was similar in both groups. Fractional clearance rate (FCR) of the nanoemulsion label was greater in the exercise-trained group compared with the sedentary group (0.138 ± 0.152 and 0.0261 ± 0.023 h−1, respectively). A positive correlation was found ( r = 0.60, P < 0.01) between FCR and peak O2consumption in trained subjects. Circulating oxidized LDL levels were lower in trained subjects compared with the sedentary group (9.0 ± 2.0 and 16.0 ± 3.0 mU/l). LDE was also injected into control and LDL receptor gene knockout mice submitted and not submitted to training. Muscle LDE uptake percentage was increased in the trained mice compared with the untrained mice (1.1 ± 0.8 and 0.2 ± 0.1, respectively, P < 0.0001) in the control group but not in the knockout animals, indicating that the LDL receptor is involved in the increased uptake elicited by exercise. These results show that exercise training increases LDE plasma removal, which in turn suggests that it also increases LDL receptors or LDL receptor activity.
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Affiliation(s)
- Carmen G C Vinagre
- Heart Institute (InCor), University of São Paulo Medical School, University of São Paulo, São Paulo, Brazil
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Couto RD, Dallan LAO, Lisboa LAF, Mesquita CH, Vinagre CGC, Maranhão RC. Deposition of free cholesterol in the blood vessels of patients with coronary artery disease: a possible novel mechanism for atherogenesis. Lipids 2007; 42:411-8. [PMID: 17443358 DOI: 10.1007/s11745-007-3041-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Accepted: 02/07/2007] [Indexed: 01/05/2023]
Abstract
A cholesterol-rich nanoemulsion (LDE) that mimics the composition of low-density lipoprotein (LDL) acquires apoE in the plasma and is taken-up by the cells by LDL receptors. In this study, to verify whether free cholesterol (FC) and the cholesteryl ester (CE) components of LDL are taken-up differently by the vessels. LDE labeled with (3)H-cholesterol and (14)C-cholesteryl oleate was injected into 20 coronary artery disease patients 24 h before a scheduled myocardial coronary artery bypass grafting. The plasma kinetics of both radiolabels was determined from plasma samples collected over 24 h, and fragments of vessels discarded during surgery were collected and analyzed for radioactivity. LDE FC was removed faster than CE. The radioactive counting of LDE CE was greater than that of LDE FC in the blood, but the uptake of FC was markedly greater than that of CE in all fragments: fivefold greater in the aorta (p = 0.04), fourfold greater in the internal thoracic artery (p = 0.03), tenfold greater in the saphenous vein (p = 0.01) and threefold in the radial artery (p = 0.05). In conclusion, the greater removal from plasma of FC compared with CE and the remarkably greater vessel tissue uptake of FC compared with CE suggests that, in the plasma, FC dissociates from the nanoemulsion particles and precipitates in the vessels. Considering LDE as an artificial nanoemulsion model for LDL, our results suggest that dissociation of FC from lipoprotein particles and deposition in the vessel wall may play a role as an independent mechanism in atherogenesis.
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Affiliation(s)
- Ricardo D Couto
- Lipid Metabolism Laboratory and the Surgical Division, The Heart Institute (INCOR) of the Medical School Hospital, University of São Paulo, Sao Paulo, Brazil
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Lo Prete AC, Maria DA, Rodrigues DG, Valduga CJ, Ibañez OCM, Maranhão RC. Evaluation in melanoma-bearing mice of an etoposide derivative associated to a cholesterol-rich nano-emulsion. J Pharm Pharmacol 2006; 58:801-8. [PMID: 16734981 DOI: 10.1211/jpp.58.6.0010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
A cholesterol-rich nano-emulsion (LDE) may be used as a vehicle to target antineoplastic drugs against cancer cells. The association of an etoposide derivative to LDE is stable and retains the cytotoxic activity of etoposide. We have evaluated the toxicity and antitumoral action of this new preparation in-vivo. Melanoma-bearing mice and control mice were administered LDE-etoposide oleate or commercial etoposide, either with or without radioactive labelling. The maximum tolerated dose (MTD), tissue distribution, plasma decay curves, pharmacokinetic parameters and antitumoral activity were determined. Association to LDE drastically reduced the drug toxicity, since MTD was approximately five-fold greater than in commercial etoposide. LDE-etoposide oleate was concentrated four-fold in the tumour compared with the normal adjacent tissues, was removed faster from plasma in tumour-bearing mice than in controls, and remained in the bloodstream longer than commercial etoposide. The tumour growth inhibition rate and survival were greater in animals treated with LDE-etoposide oleate compared with commercial etoposide. However, increasing the dose from 17 to 85 microM kg(-1) did not result in further improvement of the antitumour action. The incorporation of etoposide oleate to LDE resulted in markedly reduced toxicity and superior antitumoral activity. LDE-etoposide oleate is a promising new weapon for cancer treatment.
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Affiliation(s)
- Ana C Lo Prete
- Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Dias MLN, Carvalho JP, Rodrigues DG, Graziani SR, Maranhão RC. Pharmacokinetics and tumor uptake of a derivatized form of paclitaxel associated to a cholesterol-rich nanoemulsion (LDE) in patients with gynecologic cancers. Cancer Chemother Pharmacol 2006; 59:105-11. [PMID: 16699792 DOI: 10.1007/s00280-006-0252-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2006] [Accepted: 04/11/2006] [Indexed: 11/28/2022]
Abstract
OBJECTIVE A cholesterol-rich nanoemulsion termed LDE concentrates in cancer tissues after injection into the bloodstream. The association of a derivatized paclitaxel to LDE showed lower toxicity and increased antitumoral activity as tested in a B16 melanoma murine model. Here, the pharmacokinetics of LDE-paclitaxel oleate and the ability of LDE to concentrate the drug in the tumor were investigated in patients with gynecologic cancers. METHODS Either LDE-paclitaxel oleate doubly labeled with [(14)C]-cholesteryl oleate and [(3)H]-paclitaxel oleate or [(3)H]-paclitaxel-cremophor was intravenously injected into eight patients. Blood samples were collected over 24 h to determine the plasma decay curves. Fractional clearance rate (FCR) and pharmacokinetic parameters were calculated by compartmental analysis. Also, specimens of tumors and the corresponding normal tissues were excised during the surgery for radioactivity measurement. RESULTS The LDE and paclitaxel oleate FCR were similar (0.092 +/- 0.039 and 0.069 +/- 0.027 h(-1), respectively, n = 5, P = 0.390). FCR of paclitaxel oleate associated to LDE was smaller than that of paclitaxel-cremophor (0.231 +/- 0.128 h(-1), P = 0.028). Paclitaxel oleate T (1/2 )and AUC were greater than those of paclitaxel-cremophor (T (1/2 )=( )14.51 +/- 3.23 and 6.62 +/- 2.05 h and AUC = 2.49 +/- 0.35 and 1.26 +/- 0.40, respectively, P = 0.009, P = 0.004). The amount of paclitaxel and LDE-radioactive labels in the tumor was 3.5 times greater than in the normal tissues. CONCLUSION Paclitaxel oleate associated to LDE is stable in the bloodstream and has greater plasma half-life and AUC than those for paclitaxel-cremophor. LDE concentrates 3.5 times more paclitaxel in malignant tissues than in normal tissues. Therefore, association to LDE is an interesting strategy for using paclitaxel to treat gynecologic cancers.
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Affiliation(s)
- Maria L N Dias
- Department of Gynecology, Medical School Hospital, University of São Paulo, Sao Paulo, Brazil
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Su J, He L, Zhang N, Ho PC. Evaluation of Tributyrin Lipid Emulsion with Affinity to Low-Density Lipoprotein: Pharmacokinetics in Adult Male Wistar Rats and Cellular Activity on Caco-2 and HepG2 Cell Lines. J Pharmacol Exp Ther 2005; 316:62-70. [PMID: 16188956 DOI: 10.1124/jpet.105.090464] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The tributyrin lipid emulsion was proved to be able to bind to low-density lipoprotein (LDL) in vitro. The aim of this study was to investigate the pharmacokinetics of the emulsion in vivo and the cellular activity in vitro. The pharmacokinetics of tributyrin and its metabolite, butyrate, was evaluated in male Wistar rats after administration with pure tributyrin or tributyrin emulsion. After oral administration, maximal plasma concentration (C(max)), time to reach maximal plasma concentration (T(max)), and elimination half-life (T(1/2)) of butyrate were 87.6 muM and 25.3 and 63.0 min, respectively, for the pure tributyrin compared with 1344.5 microM and 8.5 and 19.8 min for the 10% (v/v) tributyrin emulsion. C(max) and mean residence time of tributyrin were 2.74 microM and 87.9 min and 4.2 microM and 132.0 min for pure tributyrin and 10% emulsion, respectively. The bioavailabilities of the pure tributyrin versus tributyrin emulsion were 15.3 versus 65.7% and 34.9 versus 64.5% calculated from butyrate and tributyrin, respectively. After the rats were treated with 17alpha-ethynylestradiol (an LDL receptor up-regulator), the distribution volumes calculated from both butyrate and tributyrin were significantly increased after oral administration or infusion of the 10% tributyrin emulsion. The increased distribution volume after coadministration with a LDL receptor up-regulator suggested the increased uptake of tributyrin/butyrate by tissues with increased expression of LDL receptors. The selective uptake of the emulsion by the cellular LDL receptors was further confirmed by testing the cellular viability in the presence of competing LDL. The viable cells can reach 92% of control at IC(50) in Caco-2 and 77% in HepG2 incubated with emulsion in the presence of LDL.
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Affiliation(s)
- Jie Su
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543
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Pinheiro KV, Hungria VTM, Ficker ES, Valduga CJ, Mesquita CH, Maranhão RC. Plasma kinetics of a cholesterol-rich microemulsion (LDE) in patients with Hodgkin's and non-Hodgkin's lymphoma and a preliminary study on the toxicity of etoposide associated with LDE. Cancer Chemother Pharmacol 2005; 57:624-30. [PMID: 16133527 DOI: 10.1007/s00280-005-0090-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Accepted: 07/27/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Neoplastic diseases are often associated with low plasma low-density lipoprotein (LDL) cholesterol and diminished LDL clearance due to upregulation in cancer cells of the receptors that internalize the lipoprotein. Thus, it is possible to use LDL or cholesterol-rich microemulsions (LDE) that bind to LDL receptors as carriers of antineoplastic agents to concentrate those drugs into cancer tissues. Our aim was to determine whether LDL cholesterol concentration plus LDE increased clearance occur in lymphomas. PATIENTS AND METHODS The LDE labeled with [(3) H]-cholesteryl oleate was injected into four Hodgkin's and 12 non-Hodgkin's lymphoma patients and into 16 healthy control subjects and the LDE plasma residence time (RT) was determined from sequential plasma samples. Two volunteers with relapsed/refractory lymphoma were treated with 300 mg/m(2) body surface etoposide associated with LDE in six cycles at 3-week intervals. RESULTS The LDL cholesterol was lower in lymphoma patients than in controls (94+/-52 and 115+/-16 mg/dL, p=0.0362, respectively). The LDE RT was 49% smaller in lymphoma patients than in controls (RT=21.9 and 45.7 h; p=0.0134), with positive correlation between RT and LDL cholesterol. LDE-etoposide showed no considerable toxicity in all cycles in the two treated patients and the disease remained stable during the treatment. CONCLUSIONS Our results suggest that lymphomas overexpress LDL receptors that make room for using LDE as drug-targeting vehicle and that the LDE-etoposide preparation is suitable for patient use.
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Affiliation(s)
- Ketlin V Pinheiro
- Lipid Metabolism Laboratory, Heart Institute (InCor), University of São Paulo Medical School Hospital, Av. Dr. Eneas de Carvalho Aguiar, 44,1, subsolo, 05403-000, São Paulo, Brazil
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Azevedo CHM, Carvalho JP, Valduga CJ, Maranhão RC. Plasma kinetics and uptake by the tumor of a cholesterol-rich microemulsion (LDE) associated to etoposide oleate in patients with ovarian carcinoma. Gynecol Oncol 2005; 97:178-82. [PMID: 15790455 DOI: 10.1016/j.ygyno.2004.12.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Indexed: 11/20/2022]
Abstract
OBJECTIVES Previously, we reported that etoposide oleate associated to a cholesterol-rich microemulsion (LDE) is taken up by malignant cells overexpressing low-density lipoprotein (LDL) receptors. The association is stable, preserves antiproliferative activity of the drug, and reduces toxicity to animals. Here, we determined in patients the plasma kinetics of LDE-etoposide oleate and verified whether the complex concentrates in ovarian carcinomas. METHODS [(3)H]-etoposide oleate associated to LDE labeled with [(14)C]-cholesteryl oleate was intravenously injected into four ovarian carcinoma patients (50 +/- 8.7 years) 24 h before surgery. Blood samples were collected over a 24-h period to determine the radioactivity plasma decay curves, and the plasma fractional clearance rate (FCR) was calculated by compartmental analysis. Specimens of tumors and normal ovaries excised during the surgery were collected for lipid extraction and radioactive counting. RESULTS FCRs of LDE label and of the drug were similar (0.0985 and 0.1722, respectively, P = 0.2422). [(14)C]-LDE uptake was 4.9 times and [(3)H]-etoposide oleate uptake was 4.1 times greater in the ovarian tumors than in the contralateral normal ovaries (LDE uptake, in cpm/g = 560 +/- 171 and 146 +/- 59; etoposide oleate uptake = 346 +/- 75 and 103 +/- 56, respectively). CONCLUSIONS Most of the drug is retained in the microemulsion particles until its removal from the circulation and internalization by the cells. In addition, LDE-etoposide oleate has the ability to concentrate in malignant ovarian tissues. Therefore, the complex may be used to direct and concentrate etoposide oleate in ovarian carcinomas.
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Rodrigues DG, Maria DA, Fernandes DC, Valduga CJ, Couto RD, Ibañez OCM, Maranhão RC. Improvement of paclitaxel therapeutic index by derivatization and association to a cholesterol-rich microemulsion: in vitro and in vivo studies. Cancer Chemother Pharmacol 2005; 55:565-76. [PMID: 15726368 DOI: 10.1007/s00280-004-0930-y] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2004] [Accepted: 09/27/2004] [Indexed: 11/24/2022]
Abstract
A cholesterol-rich microemulsion or nanoparticle termed LDE concentrates in cancer tissues after injection into the bloodstream. Here the cytotoxicity, pharmacokinetics, toxicity to animals and therapeutic action of a paclitaxel lipophilic derivative associated to LDE is compared with those of the commercial paclitaxel. Results show that LDE-paclitaxel oleate is stable. The cytostatic activity of the drug in the complex is diminished compared with the commercial paclitaxel due to the cytotoxicity of the vehicle Cremophor EL used in the commercial formulation. Competition experiments in neoplastic cultured cells show that paclitaxel oleate and LDE are internalized together by the LDL receptor pathway. LDE-paclitaxel oleate arrests the G(2)/M phase of cell cycle, similarly to commercial paclitaxel. Tolerability to mice is remarkable, such that the lethal dose (LD(50)) was ninefold greater than that of the commercial formulation (LD(50) = 326 microM and 37 microM, respectively). LDE concentrates paclitaxel oleate in the tumor roughly fourfold relative to the normal adjacent tissues. At equimolar doses, the association of paclitaxel oleate with LDE results in remarkable changes in the drug pharmacokinetic parameters when compared to commercial paclitaxel (t(1/2)=218 min and 184 min, AUC=1,334 microg h/ml and 707 microg h/ml and CL=0.125 ml/min and 0.236 ml/min, respectively). Finally, the therapeutic efficacy of the complex is pronouncedly greater than that of the commercial paclitaxel, as indicated by the reduction in tumor growth, increase in survival rates and % cure of treated mice. In conclusion, LDE-paclitaxel oleate is a stable complex and compared with paclitaxel toxicity is considerably reduced and activity is enhanced, which may lead to improved therapeutic index in clinical use.
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Affiliation(s)
- Debora G Rodrigues
- Lipid Metabolism Laboratory, Heart Institute (InCor), University of São Paulo Medical School Hospital, Av. Dr. Eneas de Carvalho Aguiar, 44, 1 subsolo, 05403-000 Sao Paulo, Brazil
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Tamilvanan S. Oil-in-water lipid emulsions: implications for parenteral and ocular delivering systems. Prog Lipid Res 2005; 43:489-533. [PMID: 15522762 DOI: 10.1016/j.plipres.2004.09.001] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Lipid emulsions (LEs) are heterogenous dispersions of two immiscible liquids (oil-in-water or water-in-oil) and they are subjected to various instability processes like aggregation, flocculation, coalescence and hence eventual phase separation according to the second law of thermodynamics. However, the physical stability of the LE can substantially be improved with help of suitable emulsifiers that are capable of forming a mono- or multi-layer coating film around the dispersed liquid droplets in such a way to reduce interfacial tension or to increase droplet-droplet repulsion. Depending on the concentrations of these three components (oil-water-emulsifier) and the efficiency of the emulsification equipments used to reduce droplet size, the final LE may be in the form of oil-in-water (o/w), water-in-oil (w/o), micron, submicron and double or multiple emulsions (o/w/o and w/o/w). The o/w type LEs (LE) are colloidal drug carriers, which have various therapeutic applications. As an intravenous delivery system it incorporates lipophilic water non-soluble drugs, stabilize drugs that tend to undergo hydrolysis and reduce side effects of various potent drugs. When the LE is used as an ocular delivery systems they increase local bioavailability, sustain the pharmacological effect of drugs and decrease systemic side effects of the drugs. Thus, the rationale of using LE as an integral part of effective treatment is clear. Following administration of LE through these routes, the biofate of LE associated bioactive molecules are somehow related to the vehicles disposition kinetics inside blood or eyeball. However, the LE is not devoid from undergoing various bio-process while exerting their efficacious actions. The purpose of this review is therefore to give an implication of LE for parenteral and ocular delivering systems.
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Affiliation(s)
- S Tamilvanan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S. Nagar, Punjab 160062, India.
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Naoum FA, Gualandro SFM, Latrilha MDCM, Maranhão RC. Plasma kinetics of a cholesterol-rich microemulsion in subjects with heterozygous beta-thalassemia. Am J Hematol 2004; 77:340-5. [PMID: 15551284 DOI: 10.1002/ajh.20206] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Patients with beta-thalassemia trait have been reported to present lower plasma concentrations of low-density lipoprotein (LDL) and lower frequencies of acute myocardial infarction than normal subjects. In this study, the metabolism of LDL was tested in 12 patients with heterozygous beta-thalassemia trait (HBT) and 13 healthy subjects without the disease by determining the plasma kinetics of an artificially made cholesterol-rich microemulsion (LDE) that mimics the LDL metabolism and binds to LDL receptors. The emulsion was labeled with 14C-cholesterol ester and injected intravenously into the subjects. Blood samples were drawn at regular intervals over 24 hr to determine the plasma decay curve of the emulsion radioactive label and to estimate its plasma fractional clearance rate (FCR, in hr(-1)). FCR of the 14C-cholesterol ester was greater in HBT compared to controls (0.0631 +/- 0.0178 hr(-1) and 0.0501 +/- 0.0094 hr(-1), respectively; mean +/- SD, P = 0.022). No differences were found regarding LDL cholesterol plasma concentration between the two groups, but apolipoprotein B concentration was lower in HBT than in control subjects (80 +/- 44 and 96 +/- 14, respectively; mean +/- SD, P = 0.026). Our results show that LDE FCR is increased in HBT, indicating that LDL clearance is increased in patients with beta-thalassemia trait possibly due to the increased proliferation in the bone marrow of erythroid precursors.
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Affiliation(s)
- Flávio A Naoum
- Hematology Service, University of São Paulo Medical School, São Paulo, Brazil
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Puk CG, Vinagre CGC, Bocchi E, Bacal F, Stolf N, Maranhão RC. Plasma kinetics of a cholesterol-rich microemulsion in patients submitted to heart transplantation. Transplantation 2004; 78:1177-81. [PMID: 15502716 DOI: 10.1097/01.tp.0000137788.15004.7f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Development of coronary graft disease is currently the main cause of late heart-transplantation (HT) failure. HT patients frequently show hypercholesterolemia as well as alterations in chylomicron metabolism. These postHT changes may be important in coronary graft disease development. To clarify whether hypercholesterolemia is caused by decreased low-density lipoprotein (LDL) removal from the plasma, we studied the plasma kinetics of a cholesterol-rich emulsion that binds to LDL receptor. METHODS We studied 13 HT patients and 13 healthy normolipidemic subjects paired for sex, age, and body mass index. An emulsion labeled with C-cholesteryl oleate was injected intravenously, and blood samples were collected in predetermined intervals (5 minutes, 1, 2, 4, 6, and 8 hours) to determine the radioactivity decay curves and to calculate the fractional clearance rates (FCR). RESULTS The plasma level of total cholesterol, LDL cholesterol, high-density lipoprotein cholesterol, and apo B were greater in HT group than in the control group (P<0.005). FCR C-cholesteryl oleate was smaller in HT patients when compared with the control group (P=0.02). CONCLUSION The results showed that HT patients have a deficiency in the mechanisms of LDL removal from the plasma, as tested by the cholesterol-rich emulsion, and this may be important in the development of coronary graft disease.
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Affiliation(s)
- Camila G Puk
- The Heart Institute (InCor) of the Medical School Hospital, University of São Paulo, CEP 05423-000 São Paulo, SP, Brazil
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