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2.
J Neurol Sci ; 378: 233-237, 2017 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-28566170

RESUMO

BACKGROUND: Despite the recent advances in the understanding of natalizumab (NTZ) related progressive multifocal leukoencephalopathy (PML) and its associated immune reconstitution inflammatory syndrome (PML-IRIS), the therapeutic options are still under investigated. In this context, the beneficial use of maraviroc is still an anecdotal observation. OBJECTIVE: To evaluate the impact of maraviroc in modifying the course of PML preventing IRIS or blunting IRIS manifestations. METHODS: Three patients with NTZ PML included in the Italian dataset of PML were treated with maraviroc. Their longitudinal clinical and radiological course was described in detail. RESULTS: The three patients were characterized by a steady clinical worsening not controlled by maraviroc. All the three patients manifested PML-IRIS, which emerged, respectively, at 62, 64 and 90days post NTZ withdrawal. This is in accordance with the data of the Italian dataset. Clinical and radiological stabilization of PML-IRIS occurred only after corticosteroids administration. CONCLUSION: In these three cases, maraviroc did not show any clear effect in modulating the clinical course of PML preventing IRIS. Moreover, once PML-IRIS emerged, the clinical stabilization was achieved only with the use of corticosteroids. Thus, the use of maraviroc should be regarded with extreme caution due the potential adverse events associated with its use.


Assuntos
Cicloexanos/uso terapêutico , Fatores Imunológicos/efeitos adversos , Leucoencefalopatia Multifocal Progressiva/tratamento farmacológico , Esclerose Múltipla/tratamento farmacológico , Natalizumab/efeitos adversos , Triazóis/uso terapêutico , Inibidores de Proteínas Virais de Fusão/uso terapêutico , Adulto , Encéfalo/diagnóstico por imagem , Encéfalo/efeitos dos fármacos , Feminino , Humanos , Síndrome Inflamatória da Reconstituição Imune/diagnóstico por imagem , Síndrome Inflamatória da Reconstituição Imune/tratamento farmacológico , Síndrome Inflamatória da Reconstituição Imune/etiologia , Fatores Imunológicos/uso terapêutico , Leucoencefalopatia Multifocal Progressiva/diagnóstico por imagem , Leucoencefalopatia Multifocal Progressiva/etiologia , Leucoencefalopatia Multifocal Progressiva/imunologia , Estudos Longitudinais , Masculino , Maraviroc , Pessoa de Meia-Idade , Esclerose Múltipla/complicações , Esclerose Múltipla/diagnóstico por imagem , Esclerose Múltipla/imunologia , Natalizumab/uso terapêutico , Falha de Tratamento
3.
Diabetes Obes Metab ; 19(12): 1751-1761, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28556449

RESUMO

AIMS: There are no treatments for the extreme hyperphagia and obesity in Prader-Willi syndrome (PWS). The bestPWS clinical trial assessed the efficacy, safety and tolerability of the methionine aminopeptidase 2 (MetAP2) inhibitor, beloranib. MATERIALS AND METHODS: Participants with PWS (12-65 years old) were randomly assigned (1:1:1) to biweekly placebo, 1.8 mg beloranib or 2.4 mg beloranib injection for 26 weeks at 15 US sites. Co-primary endpoints were the changes in hyperphagia [measured by Hyperphagia Questionnaire for Clinical Trials (HQ-CT); possible score 0-36] and weight by intention-to-treat. ClinicalTrials.gov registration: NCT02179151. RESULTS: One-hundred and seven participants were included in the intention-to-treat analysis: placebo (n = 34); 1.8 mg beloranib (n = 36); or 2.4 mg beloranib (n = 37). Improvement (reduction) in HQ-CT total score was greater in the 1.8 mg (mean difference -6.3, 95% CI -9.6 to -3.0; P = .0003) and 2.4 mg beloranib groups (-7.0, 95% CI -10.5 to -3.6; P = .0001) vs placebo. Compared with placebo, weight change was greater with 1.8 mg (mean difference - 8.2%, 95% CI -10.8 to -5.6; P < .0001) and 2.4 mg beloranib (-9.5%, 95% CI -12.1 to -6.8; P < .0001). Injection site bruising was the most frequent adverse event with beloranib. Dosing was stopped early due to an imbalance in venous thrombotic events in beloranib-treated participants (2 fatal events of pulmonary embolism and 2 events of deep vein thrombosis) compared with placebo. CONCLUSIONS: MetAP2 inhibition with beloranib produced statistically significant and clinically meaningful improvements in hyperphagia-related behaviours and weight loss in participants with PWS. Although investigation of beloranib has ceased, inhibition of MetAP2 is a novel mechanism for treating hyperphagia and obesity.


Assuntos
Aminopeptidases/antagonistas & inibidores , Depressores do Apetite/uso terapêutico , Cinamatos/uso terapêutico , Cicloexanos/uso terapêutico , Compostos de Epóxi/uso terapêutico , Glicoproteínas/antagonistas & inibidores , Hiperfagia/prevenção & controle , Obesidade/prevenção & controle , Síndrome de Prader-Willi/tratamento farmacológico , Inibidores de Proteases/uso terapêutico , Sesquiterpenos/uso terapêutico , Adolescente , Adulto , Aminopeptidases/metabolismo , Depressores do Apetite/administração & dosagem , Depressores do Apetite/efeitos adversos , Índice de Massa Corporal , Cinamatos/administração & dosagem , Cinamatos/efeitos adversos , Cicloexanos/administração & dosagem , Cicloexanos/efeitos adversos , Relação Dose-Resposta a Droga , Método Duplo-Cego , Término Precoce de Ensaios Clínicos , Compostos de Epóxi/administração & dosagem , Compostos de Epóxi/efeitos adversos , Feminino , Glicoproteínas/metabolismo , Humanos , Hiperfagia/etiologia , Hiperfagia/fisiopatologia , Análise de Intenção de Tratamento , Masculino , Metionil Aminopeptidases , Obesidade/etiologia , Síndrome de Prader-Willi/fisiopatologia , Inibidores de Proteases/administração & dosagem , Inibidores de Proteases/efeitos adversos , Sesquiterpenos/administração & dosagem , Sesquiterpenos/efeitos adversos , Índice de Gravidade de Doença , Trombose Venosa/induzido quimicamente , Trombose Venosa/fisiopatologia , Redução de Peso/efeitos dos fármacos , Adulto Jovem
4.
Diabetes Obes Metab ; 19(8): 1165-1170, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-28261955

RESUMO

AIMS: Hypothalamic injury-associated obesity (HIAO) results from damage to the hypothalamus that often occurs with surgical removal/radiation therapy of tumours in the hypothalamic region, such as craniopharyngioma. There is currently no rigorously studied pharmaceutical treatment for the intractable weight gain and cardiometabolic consequences that occur in patients with HIAO. We aimed to assess efficacy, safety and tolerability of beloranib treatment for 4 to 8 weeks in patients with HIAO. MATERIALS AND METHODS: This Phase 2a, double-blind, placebo-controlled study included 14 patients with HIAO, randomized to receive beloranib 1.8 mg or placebo subcutaneously twice weekly for 4 weeks with an optional 4-week open-label extension in which all patients received beloranib. The primary endpoint was change in weight from baseline to Week 4. RESULTS: Participants were 64% female, with a mean (SD) age of 32 (9) years, BMI of 43 (7) kg/m2 and weight of 126 (22) kg. Compared with placebo (N = 4), beloranib 1.8 mg (N = 8) resulted in a mean (95% CI) difference in weight of -3.2 (-5.4, -0.9) kg after 4 weeks. Weight loss continued through the 8 weeks in patients randomized to beloranib (mean -6.2 [-8.2, -4.1] kg). Beloranib treatment was associated with improvements in high-sensitivity CRP. Adverse events were mild to moderate. No patients who received beloranib discontinued treatment. CONCLUSION: Beloranib treatment resulted in progressive weight loss in patients with HIAO that was comparable to that observed with beloranib in patients with exogenous obesity. These findings indicate a novel mechanism for treating obesity in patients with HIAO.


Assuntos
Aminopeptidases/antagonistas & inibidores , Depressores do Apetite/uso terapêutico , Doenças Cardiovasculares/prevenção & controle , Cinamatos/uso terapêutico , Cicloexanos/uso terapêutico , Compostos de Epóxi/uso terapêutico , Glicoproteínas/antagonistas & inibidores , Hipotálamo/lesões , Síndrome Metabólica/prevenção & controle , Obesidade Mórbida/tratamento farmacológico , Sesquiterpenos/uso terapêutico , Adulto , Aminopeptidases/metabolismo , Depressores do Apetite/administração & dosagem , Depressores do Apetite/efeitos adversos , Biomarcadores/sangue , Índice de Massa Corporal , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/etiologia , Cinamatos/administração & dosagem , Cinamatos/efeitos adversos , Estudos de Coortes , Cicloexanos/administração & dosagem , Cicloexanos/efeitos adversos , Método Duplo-Cego , Inibidores Enzimáticos/administração & dosagem , Inibidores Enzimáticos/efeitos adversos , Inibidores Enzimáticos/uso terapêutico , Compostos de Epóxi/administração & dosagem , Compostos de Epóxi/efeitos adversos , Feminino , Seguimentos , Glicoproteínas/metabolismo , Humanos , Injeções Subcutâneas , Masculino , Síndrome Metabólica/epidemiologia , Síndrome Metabólica/etiologia , Metionil Aminopeptidases , Obesidade Mórbida/sangue , Obesidade Mórbida/etiologia , Obesidade Mórbida/fisiopatologia , Estudo de Prova de Conceito , Risco , Sesquiterpenos/administração & dosagem , Sesquiterpenos/efeitos adversos , Redução de Peso/efeitos dos fármacos , Adulto Jovem
5.
Antivir Ther ; 22(3): 263-269, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-27924779

RESUMO

BACKGROUND: In the primary 48-week analysis of a hepatic safety trial in patients with HIV-1 coinfected with HBV and/or HCV, maraviroc-containing treatment regimens were not associated with increased hepatotoxicity. METHODS: In this randomized, double-blind, placebo-controlled, multicentre study, patients received maraviroc twice daily (n=70) or placebo (n=67) with concomitant antiretroviral therapy for 144 weeks (Clinicaltrials.gov identifier, NCT01327547). The primary end point was the proportion of patients with protocol-defined Grade 3/4 alanine aminotransferase (ALT) abnormalities through week 48. Key secondary end points included 144-week analysis of Grade 3/4 ALT abnormalities and liver fibrosis by enhanced liver fibrosis (ELF) testing, hepatic elastography and an optional biopsy substudy. RESULTS: Through 144 weeks of treatment, two (maraviroc) and three (placebo) patients met the protocol-defined Grade 3/4 ALT end point. Similar to the 48-week results, there were no statistically significant differences between groups in change from baseline in ELF or hepatic elastography. However, decreased elastography scores were noted in the maraviroc group. Blinded pathologist review suggested that 2 of 11 paired biopsies (both on maraviroc) showed signs of decreased fibrosis. One (maraviroc) and two (placebo) patients experienced treatment-related hepatobiliary adverse events (AEs). Five patients in the maraviroc group discontinued because of treatment-related AEs versus three in the placebo group. One death in the maraviroc group and two deaths in the placebo group were reported. CONCLUSIONS: Use of maraviroc did not increase hepatotoxicity in this population through 144 weeks. Further investigation regarding possible beneficial effects of maraviroc on liver fibrosis may be warranted.


Assuntos
Coinfecção , Cicloexanos/efeitos adversos , Inibidores da Fusão de HIV/efeitos adversos , Infecções por HIV/tratamento farmacológico , Hepatite B , Hepatite C , Fígado/efeitos dos fármacos , Triazóis/efeitos adversos , Adulto , Idoso , Terapia Antirretroviral de Alta Atividade/efeitos adversos , Cicloexanos/uso terapêutico , Feminino , Inibidores da Fusão de HIV/uso terapêutico , Infecções por HIV/metabolismo , Hepatite B/virologia , Hepatite C/virologia , Humanos , Fígado/metabolismo , Fígado/patologia , Fígado/virologia , Testes de Função Hepática , Masculino , Maraviroc , Pessoa de Meia-Idade , Resultado do Tratamento , Triazóis/uso terapêutico , Carga Viral
6.
Endocrinology ; 158(1): 41-55, 2017 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-27849360

RESUMO

Hypothalamic lesions or deficient melanocortin (MC) signaling via MC4 receptor (MC4r) mutations often lead to hyperphagia and severe treatment-resistant obesity. We tested the methionine aminopeptidase 2-inhibitor beloranib (ZGN-440) in 2 male rat models of obesity, one modeling hypothalamic obesity with a combined medial hypothalamic lesion (CMHL) and the other modeling a monogenic form of obesity with MC4r mutations (MC4r knockout [MC4rKO]). In CMHL rats (age 3 months), postsurgery excess weight gain was significantly inhibited (ZGN-440, 0.2 ± 0.7 g/d; vehicle, 3.8 ± 0.6 g/d; P < 0.001) during 12 days of ZGN-440 treatment (0.1 mg/kg daily subcutaneously) together with a 30% reduction of daily food intake vs vehicle injection. In addition, ZGN-440 treatment improved glucose tolerance and reduced plasma insulin, and circulating levels of α-melanocyte stimulating hormone were increased. Serum lipid levels did not differ significantly in ZGN-440-treated vs vehicle-treated rats. Similar results were found in MC4rKO rats: ZGN-440 treatment (14-21 d) was associated with significant reductions of body weight gain (MC4rKO, -1.7 ± 0.6 vs 2.8 ± 0.4 g/d; lean wild-type controls, -0.7 ± 0.2 vs 1.7 ± 0.7 g/d; ZGN-440 vs vehicle, respectively), reduction of food intake (MC4rKO, -28%; lean controls, -7.5%), and insulin resistance, whereas circulating levels of interleukin-1ß did not change. In both obesity models, body temperature and locomotor activity were not affected by ZGN-440 treatment. In conclusion, the robust reduction of body weight in response to ZGN-440 observed in rats with severe obesity is related to a strong reduction of food intake that is likely related to changes in the central regulation of feeding.


Assuntos
Aminopeptidases/antagonistas & inibidores , Cinamatos/uso terapêutico , Cicloexanos/uso terapêutico , Compostos de Epóxi/uso terapêutico , Hipotálamo Médio/lesões , Metaloendopeptidases/antagonistas & inibidores , Obesidade/tratamento farmacológico , Receptor Tipo 4 de Melanocortina/genética , Sesquiterpenos/uso terapêutico , Animais , Temperatura Corporal , Peso Corporal , Cinamatos/farmacologia , Cicloexanos/farmacologia , Modelos Animais de Doenças , Avaliação Pré-Clínica de Medicamentos , Ingestão de Alimentos , Compostos de Epóxi/farmacologia , Expressão Gênica , Teste de Tolerância a Glucose , Hiperfagia/complicações , Resistência à Insulina , Leptina/sangue , Metabolismo dos Lipídeos , Fígado/enzimologia , Masculino , Obesidade/sangue , Obesidade/etiologia , Ratos Sprague-Dawley , Ratos Transgênicos , Sesquiterpenos/farmacologia
7.
Inflamm Res ; 65(11): 917-924, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27423909

RESUMO

OBJECTIVE: Our preview study found that CCR5 blockade combined with cyclosporine A could attenuate the severity of liver GVHD. But the potential immunological mechanisms have not yet been explored. So our present study was designed to clarify the potential immunological mechanisms in mouse models after allo-HSCT. METHODS: Firstly, we detected donor T cells homing to target organs, and analyzed the specific effector subsets in liver. Additionally, we assessed antigen-presenting cells (APCs), especially DCs and CD4+ T cells differentiation in secondary lymphoid organs. RESULTS: Data showed that MVC combined with CsA reduced donor T cells migration to target organs in vivo. MVC and CsA treatment reduced the amount of donor T cells in the absolute numbers, also in donor CD4+ and CD8+ T cells by targeting at CCR5. And MVC co-injected with CsA was capable of slightly suppressing DC maturation, and reduced the percentage of Th1 and Th17 mainly by noncompetitive combination of CCR5. CONCLUSION: Combined use of MVC and CsA was effective in attenuating liver GVHD in murine model. It can suppress DC maturation, affect T cells differentiation, and reduce donor T cells homing to target organs. This may offer a novel therapeutic perspective approach for clinical liver GVHD after allo-HSCT.


Assuntos
Antagonistas dos Receptores CCR5 , Cicloexanos , Ciclosporina , Doença Enxerto-Hospedeiro/tratamento farmacológico , Imunossupressores , Linfócitos T/efeitos dos fármacos , Triazóis , Animais , Antagonistas dos Receptores CCR5/farmacologia , Antagonistas dos Receptores CCR5/uso terapêutico , Cicloexanos/farmacologia , Cicloexanos/uso terapêutico , Ciclosporina/farmacologia , Ciclosporina/uso terapêutico , Citocinas/genética , Citocinas/imunologia , Quimioterapia Combinada , Feminino , Doença Enxerto-Hospedeiro/imunologia , Doença Enxerto-Hospedeiro/metabolismo , Doença Enxerto-Hospedeiro/patologia , Transplante de Células-Tronco Hematopoéticas , Imunossupressores/farmacologia , Imunossupressores/uso terapêutico , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Masculino , Maraviroc , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Receptores CCR5/metabolismo , Linfócitos T/imunologia , Triazóis/farmacologia , Triazóis/uso terapêutico
8.
Cancer Cell ; 29(4): 587-601, 2016 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-27070705

RESUMO

The immune response influences the clinical course of colorectal cancer (CRC). Analyzing the invasive margin of human CRC liver metastases, we identified a mechanism of immune cell exploitation by tumor cells. While two distinct subsets of myeloid cells induce an influx of T cells into the invasive margin via CXCL9/CXCL10, CCL5 is produced by these T cells and stimulates pro-tumoral effects via CCR5. CCR5 blockade in patient-derived functional in vitro organotypic culture models showed a macrophage repolarization with anti-tumoral effects. These anti-tumoral effects were then confirmed in a phase I trial with a CCR5 antagonist in patients with liver metastases of advanced refractory CRC. Mitigation of tumor-promoting inflammation within the tumor tissue and objective tumor responses in CRC were observed.


Assuntos
Adenocarcinoma/secundário , Quimiocina CCL5/antagonistas & inibidores , Neoplasias Colorretais/imunologia , Neoplasias Hepáticas/secundário , Terapia de Alvo Molecular , Proteínas de Neoplasias/antagonistas & inibidores , Receptores CCR5/efeitos dos fármacos , Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/imunologia , Apoptose/efeitos dos fármacos , Quimiocina CCL5/biossíntese , Quimiocina CCL5/metabolismo , Quimiocinas/fisiologia , Quimiotaxia , Ensaios Clínicos Fase I como Assunto , Ácido Clodrônico/farmacologia , Cicloexanos/farmacologia , Cicloexanos/uso terapêutico , Humanos , Interferon-alfa/metabolismo , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/imunologia , Neoplasias Hepáticas/metabolismo , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/secundário , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/metabolismo , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Maraviroc , NG-Nitroarginina Metil Éster/farmacologia , Invasividade Neoplásica , Proteínas de Neoplasias/fisiologia , Compostos de Fenilureia/uso terapêutico , Projetos Piloto , Piridinas/uso terapêutico , Receptores CCR5/metabolismo , Fator de Transcrição STAT3/fisiologia , Análise de Sobrevida , Triazóis/farmacologia , Triazóis/uso terapêutico , Células Tumorais Cultivadas , Microambiente Tumoral/efeitos dos fármacos
9.
Oncologist ; 21(5): 576-85, 2016 05.
Artigo em Inglês | MEDLINE | ID: mdl-27026677

RESUMO

BACKGROUND: Treatment options for women with metastatic, persistent, or recurrent cervical cancer are limited and thus the disease portends a poor prognosis. It is critical to understand the pathophysiology of cervical cancer to better delineate therapeutic targets. The development of antiangiogenic therapies and their subsequent analysis in rigorous therapeutic trials have redefined current management strategies and is an exciting area of current exploration. RESULTS: Translational trials have furthered the understanding of molecular determinants of angiogenesis. Phase II trials have shown promising trends with developing antiangiogenic therapies. A practice-changing phase III trial has recently been published. Given the potential benefits and different toxicity spectrum compared with standard cytotoxic chemotherapy, antiangiogenic options are under active investigation for this vulnerable patient population. Emerging data are promising for other antiangiogenic-directed therapeutics, as well as cervical cancer molecular biomarkers to guide diagnosis and treatment. CONCLUSION: Antiangiogenic therapies have evolved during the past 20 years and remain an exciting area of current exploration. IMPLICATIONS FOR PRACTICE: Understanding of the angiogenic microenvironment has furthered understanding of tumor biology and management. Antiangiogenic therapies show promise for women with advanced cervical cancer. A review of the evolution of these biologic agents shows them to be an effective and tolerable management strategy for many patients in this vulnerable population, with exciting future potential.


Assuntos
Inibidores da Angiogênese/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Neoplasias do Colo do Útero/tratamento farmacológico , Bevacizumab/uso terapêutico , Ensaios Clínicos como Assunto , Cicloexanos/uso terapêutico , Feminino , Humanos , Metástase Neoplásica , O-(Cloroacetilcarbamoil)fumagilol , Prognóstico , Sesquiterpenos/uso terapêutico , Neoplasias do Colo do Útero/irrigação sanguínea , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/patologia
10.
Heart Lung Circ ; 25(5): 425-34, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26993094

RESUMO

Heart failure is a significant global health problem, which is becoming worse as the population ages, and remains one of the biggest burdens on our economy. Despite significant advances in cardiovascular medicine, management and surgery, mortality rates remain high, with almost half of patients with heart failure dying within five years of diagnosis. As a multifactorial clinical syndrome, heart failure still represents an epidemic threat, highlighting the need for deeper insights into disease mechanisms and the development of innovative therapeutic strategies for both treatment and prevention. In this review, we discuss conventional heart failure therapies and highlight new pharmacological agents targeting pathophysiological features of the failing heart, for example, non-coding RNAs, angiotensin receptor-neprilysin inhibitors, cardiac myosin activators, BGP-15 and molecules targeting GRK2 including M119, gallein and paroxetine. Finally, we address the disparity between phase II and phase III clinical trials that prevent the translation of emerging HF therapies into new and approved therapies.


Assuntos
Antagonistas de Receptores de Angiotensina/uso terapêutico , Cicloexanos/uso terapêutico , Insuficiência Cardíaca/terapia , Oximas/uso terapêutico , Paroxetina/uso terapêutico , Piperidinas/uso terapêutico , Xantenos/uso terapêutico , Miosinas Cardíacas/metabolismo , Ensaios Clínicos Fase II como Assunto , Ensaios Clínicos Fase III como Assunto , Quinase 2 de Receptor Acoplado a Proteína G/antagonistas & inibidores , Quinase 2 de Receptor Acoplado a Proteína G/metabolismo , Insuficiência Cardíaca/metabolismo , Insuficiência Cardíaca/mortalidade , Insuficiência Cardíaca/fisiopatologia , Humanos , Neprilisina/antagonistas & inibidores , Neprilisina/metabolismo , RNA não Traduzido/metabolismo
11.
Curr Top Med Chem ; 16(13): 1478-88, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26369821

RESUMO

Angiogenesis has been identified as a crucial process in the development and spread of cancers. There are many regulators of angiogenesis which are not yet fully understood. Methionine aminiopeptidase is a metalloenzyme with two structurally distinct forms in humans, Type-1 (MetAP-1) and Type-2 (MetAP-2). It has been shown that small molecule inhibitors of MetAP-2 suppress endothelial cell proliferation. The initial discovery by Donald Ingber of MetAP-2 inhibition as a potential target in angiogenesis began with a fortuitous observation similar to the discovery of penicillin activity by Sir Alexander Fleming. From a drug design perspective, MetAP-2 is an attractive target. Fumagillin and ovalicin, known natural products, bind with IC50 values in low nanomolar concentrations. Crystal structures of the bound complexes provide 3-dimensional coordinates for advanced computational studies. More recent discoveries have shown other biological activities for MetAP-2 inhibition, which has generated new interests in the design of novel inhibitors. Semisynthetic fumagillin derivatives such as AGM-1470 (TNP-470) have been shown to have better drug properties, but have not been very successful in clinical trials. The rationale and development of novel multicyclic analogs of fumagillin are reviewed.


Assuntos
Aminopeptidases/antagonistas & inibidores , Inibidores Enzimáticos/farmacologia , Glicoproteínas/antagonistas & inibidores , Neovascularização Patológica/tratamento farmacológico , Aminopeptidases/metabolismo , Animais , Proliferação de Células/efeitos dos fármacos , Cicloexanos/química , Cicloexanos/farmacologia , Cicloexanos/uso terapêutico , Inibidores Enzimáticos/química , Glicoproteínas/metabolismo , Humanos , Metionil Aminopeptidases , Modelos Moleculares , Conformação Molecular , Neovascularização Patológica/metabolismo , O-(Cloroacetilcarbamoil)fumagilol , Sesquiterpenos/química , Sesquiterpenos/farmacologia , Sesquiterpenos/uso terapêutico
12.
Pharm Dev Technol ; 21(1): 121-6, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-25380396

RESUMO

MJC13, a novel FKBP52 targeting agent, has potential use for the treatment of castration-resistant prostate cancer. The purpose of this work was to develop a solution formulation of MJC13, and obtain its efficacy profile in a human prostate cancer xenograft mouse model. Preformulation studies were conducted to evaluate the physicochemical properties. Co-solvent systems were evaluated for aqueous solubility and tolerance. A human prostate cancer xenograft mouse model was established by growing 22Rv1 prostate cancer cells in C.B-17 SCID mice. The optimal formulation was used to study the efficacy of MJC13 in this preclinical model of castrate-resistant prostate cancer. We found that MJC13 was stable (at least for 1 month), highly lipophilic (logP = 6.49), poorly soluble in water (0.28 µg/mL), and highly plasma protein bound (>98%). The optimal formulation consisting of PEG 400 and Tween 80 (1:1, v/v) allowed us to achieve a MJC13 concentration of 7.5 mg/mL, and tolerated an aqueous environment. After twice weekly intratumoral injection with 10 mg/kg MJC13 in this formulation for four consecutive weeks, tumor volumes were significantly reduced compared to vehicle-treated controls.


Assuntos
Anilidas/síntese química , Antineoplásicos/síntese química , Química Farmacêutica/métodos , Cicloexanos/síntese química , Modelos Animais de Doenças , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Anilidas/uso terapêutico , Animais , Antineoplásicos/uso terapêutico , Linhagem Celular Tumoral , Cicloexanos/uso terapêutico , Humanos , Injeções Intralesionais , Masculino , Camundongos , Camundongos SCID , Soluções Farmacêuticas/síntese química , Soluções Farmacêuticas/uso terapêutico , Ratos , Resultado do Tratamento , Ensaios Antitumorais Modelo de Xenoenxerto/métodos
13.
Expert Rev Anti Infect Ther ; 14(1): 5-8, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26509356

RESUMO

Maraviroc is a first-in-class selective CCR5 antagonist only approved in combination with other antiretrovirals for the treatment of HIV-infection. However, sometimes, off-label prescribing is necessary. In this regard, interesting data have been obtained with maraviroc from studies using murine models. In human daily clinical practice there are many researching areas of interest where CCR5 could play an important role. Nowadays few clinical trials are evaluating maraviroc's role in non-HIV-infected patients but there are many open issues that need to be answered about CCR5 antagonists. In this article we review some of them.


Assuntos
Artrite Reumatoide/tratamento farmacológico , Antagonistas dos Receptores CCR5/uso terapêutico , Cicloexanos/uso terapêutico , Doença Enxerto-Hospedeiro/tratamento farmacológico , Inibidores da Fusão de HIV/uso terapêutico , Neoplasias Hematológicas/tratamento farmacológico , Sarcoidose/tratamento farmacológico , Triazóis/uso terapêutico , Animais , Artrite Reumatoide/imunologia , Artrite Reumatoide/patologia , Ensaios Clínicos como Assunto , Doença Enxerto-Hospedeiro/imunologia , Doença Enxerto-Hospedeiro/patologia , Infecções por HIV/tratamento farmacológico , Infecções por HIV/imunologia , Infecções por HIV/virologia , HIV-1/efeitos dos fármacos , HIV-1/fisiologia , Neoplasias Hematológicas/imunologia , Neoplasias Hematológicas/patologia , Humanos , Maraviroc , Camundongos , Uso Off-Label , Sarcoidose/patologia
14.
Drug Des Devel Ther ; 9: 5447-68, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26491256

RESUMO

The human immunodeficiency virus-1 (HIV-1) enters target cells by binding its envelope glycoprotein gp120 to the CD4 receptor and/or coreceptors such as C-C chemokine receptor type 5 (CCR5; R5) and C-X-C chemokine receptor type 4 (CXCR4; X4), and R5-tropic viruses predominate during the early stages of infection. CCR5 antagonists bind to CCR5 to prevent viral entry. Maraviroc (MVC) is the only CCR5 antagonist currently approved by the United States Food and Drug Administration, the European Commission, Health Canada, and several other countries for the treatment of patients infected with R5-tropic HIV-1. MVC has been shown to be effective at inhibiting HIV-1 entry into cells and is well tolerated. With expanding MVC use by HIV-1-infected humans, different clinical outcomes post-approval have been observed with MVC monotherapy or combination therapy with other antiretroviral drugs, with MVC use in humans infected with dual-R5- and X4-tropic HIV-1, infected with different HIV-1 genotype or infected with HIV-2. This review discuss the role of CCR5 in HIV-1 infection, the development of the CCR5 antagonist MVC, its pharmacokinetics, pharmacodynamics, drug-drug interactions, and the implications of these interactions on treatment outcomes, including viral mutations and drug resistance, and the mechanisms associated with the development of resistance to MVC. This review also discusses available studies investigating the use of MVC in the treatment of other diseases such as cancer, graft-versus-host disease, and inflammatory diseases.


Assuntos
Antagonistas dos Receptores CCR5/uso terapêutico , Cicloexanos/uso terapêutico , Inibidores da Fusão de HIV/uso terapêutico , Infecções por HIV/tratamento farmacológico , HIV-1/efeitos dos fármacos , Triazóis/uso terapêutico , Animais , Anti-Inflamatórios/uso terapêutico , Antineoplásicos/uso terapêutico , Antagonistas dos Receptores CCR5/efeitos adversos , Antagonistas dos Receptores CCR5/farmacocinética , Cicloexanos/efeitos adversos , Cicloexanos/farmacocinética , Interações Medicamentosas , Farmacorresistência Viral/genética , Genótipo , Inibidores da Fusão de HIV/efeitos adversos , Inibidores da Fusão de HIV/farmacocinética , Infecções por HIV/diagnóstico , Infecções por HIV/virologia , HIV-1/genética , HIV-1/metabolismo , Humanos , Maraviroc , Mutação , Fenótipo , Polimedicação , Resultado do Tratamento , Triazóis/efeitos adversos , Triazóis/farmacocinética
15.
Curr Obes Rep ; 4(4): 451-9, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26346394

RESUMO

Obesity drugs have had a chequered history. In the recent past, only the low efficacy, pancreatic lipase inhibitor orlistat was available worldwide and it was little used. The 5HT2C agonist, lorcaserin, and two combinations of old drugs have been approved in the United States but not in Europe. The diabetes drug liraglutide has been approved in both the US and Europe and seems likely to be most widely accepted. In view of regulators' caution in approving obesity drugs, some (like beloranib) may initially be progressed for niche obesity markets. New drug targets have been identified in brown adipose tissue with the aim of not only activating thermogenesis but also increasing the capacity for thermogenesis in this tissue. Attempts are being made to match the efficacy of bariatric surgery by mimicking multiple gut hormones. Unapproved pharmacotherapies are tempting for some patients. Others remain optimistic about more conventional routes to pharmacotherapy.


Assuntos
Fármacos Antiobesidade/uso terapêutico , Obesidade/tratamento farmacológico , Redução de Peso/efeitos dos fármacos , Tecido Adiposo Marrom/efeitos dos fármacos , Tecido Adiposo Marrom/metabolismo , Fármacos Antiobesidade/farmacologia , Depressores do Apetite/uso terapêutico , Benzazepinas/uso terapêutico , Cinamatos/uso terapêutico , Ensaios Clínicos como Assunto , Cicloexanos/uso terapêutico , Aprovação de Drogas , Combinação de Medicamentos , Compostos de Epóxi/uso terapêutico , Europa (Continente) , Humanos , Lactonas/uso terapêutico , Liraglutida/uso terapêutico , Terapia de Alvo Molecular/tendências , Orlistate , Sesquiterpenos/uso terapêutico , Termogênese/efeitos dos fármacos , Estados Unidos
16.
BMJ Open ; 5(8): e007901, 2015 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-26275900

RESUMO

OBJECTIVES: While bidirectional relationships exist between body weight and physical activity, direction of causality remains uncertain and previous studies have been limited by self-reported activity or weight and small sample size. We investigated the prospective relationships between weight and physical activity. DESIGN: Observational analysis of data from the Nateglinide And Valsartan in Impaired Glucose Tolerance Outcomes Research (NAVIGATOR) study, a double-blinded randomised clinical trial of nateglinide and valsartan, respectively. SETTING: Multinational study of 9306 participants. PARTICIPANTS: Participants with biochemically confirmed impaired glucose tolerance had annual measurements of both weight and step count using research grade pedometers, worn for 7 days consecutively. Along with randomisation to valsartan or placebo plus nateglinide or placebo, participants took part in a lifestyle modification programme. OUTCOME MEASURES: Longitudinal regression using weight as response value and physical activity as predictor value was conducted, adjusted for baseline covariates. Analysis was then repeated with physical activity as response value and weight as predictor value. Only participants with a response value preceded by at least three annual response values were included. RESULTS: Adequate data were available for 2811 (30%) of NAVIGATOR participants. Previous weight (χ(2)=16.8; p<0.0001), but not change in weight (χ(2)=0.1; p=0.71) was inversely associated with subsequent step count, indicating lower subsequent levels of physical activity in heavier individuals. Change in step count (χ(2)=5.9; p=0.02) but not previous step count (χ(2)=0.9; p=0.34) was inversely associated with subsequent weight. However, in the context of trajectories already established for weight (χ(2) for previous weight measurements 747.3; p<0.0001) and physical activity (χ(2) for previous step count 432.6; p<0.0001), these effects were of limited clinical importance. CONCLUSIONS: While a prospective bidirectional relationship was observed between weight and physical activity, the magnitude of any effect was very small in the context of natural trajectories already established for these variables. TRIAL REGISTRATION NUMBER: NCT00097786.


Assuntos
Peso Corporal , Atividade Motora , Cicloexanos/uso terapêutico , Método Duplo-Cego , Intolerância à Glucose/tratamento farmacológico , Intolerância à Glucose/fisiopatologia , Humanos , Hipoglicemiantes/uso terapêutico , Estilo de Vida , Nateglinida , Fenilalanina/análogos & derivados , Fenilalanina/uso terapêutico , Estudos Prospectivos , Valsartana/uso terapêutico
17.
Cancer Res ; 75(19): 4063-73, 2015 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-26238785

RESUMO

Triple-negative breast cancer (TNBC) patients have the highest risk of recurrence and metastasis. Because they cannot be treated with targeted therapies, and many do not respond to chemotherapy, they represent a clinically underserved group. TNBC is characterized by reduced expression of metastasis suppressors such as Raf kinase inhibitory protein (RKIP), which inhibits tumor invasiveness. Mechanisms by which metastasis suppressors alter tumor cells are well characterized; however, their ability to regulate the tumor microenvironment and the importance of such regulation to metastasis suppression are incompletely understood. Here, we use species-specific RNA sequencing to show that RKIP expression in tumors markedly reduces the number and metastatic potential of infiltrating tumor-associated macrophages (TAM). TAMs isolated from nonmetastatic RKIP(+) tumors, relative to metastatic RKIP(-) tumors, exhibit a reduced ability to drive tumor cell invasion and decreased secretion of prometastatic factors, including PRGN, and shed TNFR2. RKIP regulates TAM recruitment by blocking HMGA2, resulting in reduced expression of numerous macrophage chemotactic factors, including CCL5. CCL5 overexpression in RKIP(+) tumors restores recruitment of prometastatic TAMs and intravasation, whereas treatment with the CCL5 receptor antagonist Maraviroc reduces TAM infiltration. These results highlight the importance of RKIP as a regulator of TAM recruitment through chemokines such as CCL5. The clinical significance of these interactions is underscored by our demonstration that a signature comprised of RKIP signaling and prometastatic TAM factors strikingly separates TNBC patients based on survival outcome. Collectively, our findings identify TAMs as a previously unsuspected mechanism by which the metastasis-suppressor RKIP regulates tumor invasiveness, and further suggest that TNBC patients with decreased RKIP activity and increased TAM infiltration may respond to macrophage-based therapeutics.


Assuntos
Quimiocinas/fisiologia , Quimiotaxia , Macrófagos/imunologia , Neoplasias Mamárias Experimentais/imunologia , Metástase Neoplásica/imunologia , Proteínas de Neoplasias/fisiologia , Proteína de Ligação a Fosfatidiletanolamina/fisiologia , Neoplasias de Mama Triplo Negativas/imunologia , Microambiente Tumoral/imunologia , Animais , Linhagem Celular Tumoral/transplante , Quimiocina CCL5/biossíntese , Quimiocina CCL5/genética , Quimiocina CCL5/fisiologia , Cicloexanos/farmacologia , Cicloexanos/uso terapêutico , Intervalo Livre de Doença , Feminino , Perfilação da Expressão Gênica , Técnicas de Silenciamento de Genes , Proteína HMGA2/fisiologia , Xenoenxertos/imunologia , Humanos , Neoplasias Mamárias Experimentais/tratamento farmacológico , Maraviroc , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Camundongos Nus , Proteínas de Neoplasias/biossíntese , Proteínas de Neoplasias/genética , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , RNA Neoplásico/biossíntese , RNA Neoplásico/genética , Receptores CCR5/efeitos dos fármacos , Análise de Sequência de RNA , Triazóis/farmacologia , Triazóis/uso terapêutico , Neoplasias de Mama Triplo Negativas/mortalidade
18.
Anticancer Res ; 35(9): 4757-64, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26254366

RESUMO

The purpose of the present study was to develop an advanced method of anti-angiogenic chemoembolization to target morphological vascular heterogeneity in tumors and further the therapeutic efficacy of cancer treatment. This new chemoembolization approach was designed using resorbable calcium-phosphate ceramic microspheres (CPMs), in a mixture of three different sizes, which were loaded with an anti-angiogenic agent to target the tumor vasculature in highly angiogenic solid tumors in humans in vivo. The human uterine carcinosarcoma cell line, FU-MMT-3, was used in this study because the tumor is highly aggressive and exhibits a poor response to radiotherapy and chemotherapeutic agents that are in current use. CPMs loaded with TNP-470, an anti-angiogenic agent, were injected into FU-MMT-3 xenografts in nude mice three times per week for 8 weeks. The treatment with TNP-470-loaded CPMs of three different diameters achieved a greater suppression of tumor growth in comparison to treatment with single-size TNP-470-loaded CPMs alone, and the control. Severe loss of body weight was not observed in any mice treated with any size of TNP-470-loaded CPMs. These results suggest that treatment with a mixture of differently-sized anti-angiogenic CPMs might be more effective than treatment with CPMs of a single size. This advanced chemoembolization method, which incorporated an anti-angiogenic agent to target the morphological vascular heterogeneity of tumors may contribute to effective treatment of locally advanced or recurrent solid tumors.


Assuntos
Inibidores da Angiogênese/uso terapêutico , Fosfatos de Cálcio/uso terapêutico , Cerâmica/uso terapêutico , Quimioembolização Terapêutica , Microesferas , Neoplasias/irrigação sanguínea , Neovascularização Patológica/tratamento farmacológico , Animais , Antineoplásicos/uso terapêutico , Cristalização , Cicloexanos/farmacologia , Cicloexanos/uso terapêutico , Humanos , Camundongos Nus , Microscopia Eletrônica de Varredura , Neoplasias/tratamento farmacológico , Neoplasias/patologia , Neovascularização Patológica/patologia , O-(Cloroacetilcarbamoil)fumagilol , Sesquiterpenos/farmacologia , Sesquiterpenos/uso terapêutico , Ensaios Antitumorais Modelo de Xenoenxerto
19.
Diabetes Obes Metab ; 17(11): 1021-32, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26040215

RESUMO

Recently, the recognition of obesity as a complex disease that requires chronic management has become more widespread. There has also been a movement away from a focus on body mass index alone, and toward the management of obesity-related comorbidities as well as excess weight. This article examines the current and emerging pharmacological options for weight management in people with overweight or obesity who have, or are at a high risk of, weight-related comorbidities. In the USA, the current options for pharmacological weight management are phentermine (indicated for short-term use only), orlistat, combined phentermine/topiramate extended release, lorcaserin, naltrexone/bupropion and liraglutide 3.0 mg. Currently, orlistat, naltrexone/bupropion and liraglutide 3.0 mg are approved in Europe. All of the above-mentioned medications have shown weight-loss efficacy versus placebo. Those approved for long-term weight management have also been associated with improvements in weight-related comorbidities, such as hypertension, prediabetes, diabetes or dyslipidaemia, or related biomarkers. As with all drugs, the safety and tolerability profiles of medications for weight management should be considered alongside their efficacy to ensure correct use. Additional medications for weight management that are in clinical development include bupropion/zonisamide and beloranib. The field of obesity treatment is advancing with a number of medications being recently approved, and with other pharmacological options emerging.


Assuntos
Fármacos Antiobesidade/uso terapêutico , Obesidade/tratamento farmacológico , Sobrepeso/tratamento farmacológico , Bupropiona/uso terapêutico , Cinamatos/uso terapêutico , Comorbidade , Cicloexanos/uso terapêutico , Diabetes Mellitus/epidemiologia , Dislipidemias/epidemiologia , Compostos de Epóxi/uso terapêutico , Humanos , Hipertensão/epidemiologia , Isoxazóis/uso terapêutico , Obesidade/epidemiologia , Sobrepeso/epidemiologia , Estado Pré-Diabético/epidemiologia , Sesquiterpenos/uso terapêutico , Redução de Peso/efeitos dos fármacos , Zonisamida
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