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1.
Pediatr. aten. prim ; 23(89): 95-97, ene.-mar. 2021. ilus
Artigo em Espanhol | IBECS | ID: ibc-202622

RESUMO

La glucogenosis es una enfermedad metabólica poco frecuente, producida por un trastorno del metabolismo de los hidratos de carbono. Existen múltiples variantes en función de la enzima implicada, la tipo 9 se produce por una deficiencia de la glucógeno desfoforilasa-cinasa a nivel hepático y se caracteriza por la presencia de hepatomegalia, hipertransaminasemia e hipoglucemia con el ayuno. Se presenta el caso de una lactante de 10 meses, cuyos síntomas guías fueron la distensión abdominal y la hiperfagia. El diagnóstico de glucogenosis se confirmó mediante el estudio genético, objetivándose una mutación en el gen PHKG2, compatible con el diagnóstico de enfermedad de almacenamiento de glucógeno tipo 9C. Se instauró tratamiento sintomático, evitando el ayuno y aumentando la ingesta hidratos de carbono de absorción lenta, con buena evolución clínica


Glycogenesis is a rare metabolic disease caused by a carbohydrate metabolism disorder. There are multiple variants depending on the enzyme involved. Type 9 is produced by a deficiency of glycogen defoforilase-kinase in the liver and is characterized by the presence of hepatomegaly, hypertransaminasemia and hypoglycemia during fasting. We describe the case of a 10-month-old girl, whose guiding symptoms were abdominal distention and hyperphagia. The diagnosis of glycogenosis was confirmed by genetic study, observing a mutation in the PHKG2 gene, compatible with the diagnosis of type 9C glycogen storage disease. Symptomatic treatment was established, avoiding fasting and increasing the intake of slowly absorbing carbohydrates, with good clinical evolution


Assuntos
Humanos , Feminino , Lactente , Hepatomegalia/diagnóstico por imagem , Transaminases/efeitos dos fármacos , Hipoglicemia/diagnóstico , Hiperfagia/complicações , Dietoterapia , Doença de Depósito de Glicogênio/diagnóstico , Hepatomegalia/fisiopatologia , Transaminases/sangue , Carboidratos/uso terapêutico , Hipoglicemia/sangue , Ecocardiografia
2.
Breast ; 54: 160-163, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33096323

RESUMO

Cyclin-dependent kinase inhibitors (CDKIs) and endocrine therapy (ET) are the corner-stone of systemic therapy for patients with hormone-positive (HR+) HER2-negative metastatic breast cancer (MBC). However, limited data exist regarding rechallenge treatment strategies with CDKIs after limiting toxicity. In this report, we provide evidence of the safety and efficacy of sequential treatment with palbociclib or abemaciclib in 6 HR+/HER- MBC patients who experienced grade ≥3 ribociclib-induced hypertransaminasemia. Until results from large observational or randomized studies are communicated, empirical evidence may help make individualized decisions on CDKI rechallenge beyond ribociclib-induced unacceptable liver toxicity.


Assuntos
Aminopiridinas/administração & dosagem , Antineoplásicos/administração & dosagem , Benzimidazóis/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Piperazinas/administração & dosagem , Inibidores de Proteínas Quinases/administração & dosagem , Piridinas/administração & dosagem , Aminopiridinas/efeitos adversos , Antineoplásicos/efeitos adversos , Neoplasias da Mama/sangue , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Quinase 4 Dependente de Ciclina/antagonistas & inibidores , Quinase 6 Dependente de Ciclina/antagonistas & inibidores , Substituição de Medicamentos , Feminino , Humanos , Pessoa de Meia-Idade , Inibidores de Proteínas Quinases/efeitos adversos , Purinas/efeitos adversos , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo , Estudos Retrospectivos , Transaminases/sangue , Transaminases/efeitos dos fármacos , Resultado do Tratamento
4.
J Cutan Pathol ; 47(9): 800-808, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32310304

RESUMO

BACKGROUND: There are conflicting reports on the association between interface dermatitis and hepatic involvement in DRESS. METHODS: A cross-sectional analysis of the clinical and the histopathologic features of DRESS was performed to study the association between the histopathology of the skin rash and hepatic involvement. RESULTS: The clinical and the histopathologic findings were evaluated in 40 cases of DRESS. Thirty patients (75%) had a hepatic involvement. Thirty (75%) biopsy specimens showed a combination of different inflammatory patterns. The interface dermatitis was noted in 24 specimens (60%). Twenty-one patients with the interface dermatitis had a hepatic involvement (P = .04). CONCLUSIONS: The skin rash of DRESS often shows the coexistence of different inflammatory patterns. The interface dermatitis showed a statistically significant association with the hepatic involvement in DRESS.


Assuntos
Dermatite/patologia , Síndrome de Hipersensibilidade a Medicamentos/patologia , Eosinofilia/induzido quimicamente , Exantema/induzido quimicamente , Fígado/efeitos dos fármacos , Adulto , Biópsia , Estudos Transversais , Dermatite/imunologia , Síndrome de Hipersensibilidade a Medicamentos/diagnóstico , Exantema/patologia , Feminino , Humanos , Hiperbilirrubinemia/induzido quimicamente , Fígado/enzimologia , Fígado/patologia , Masculino , Pessoa de Meia-Idade , Transaminases/sangue , Transaminases/efeitos dos fármacos
5.
Autophagy ; 16(1): 106-122, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-30909789

RESUMO

GBM (glioblastoma multiforme) is the most common and aggressive brain tumor with no curative options available. Therefore, it is imperative to develop novel potent therapeutic drugs for GBM treatment. Here, we show that regorafenib, an oral multi-kinase inhibitor, exhibits superior therapeutic efficacy over temozolomide, the first-line chemotherapeutic agent for GBM treatment both in vitro and in vivo. Mechanistically, regorafenib directly stabilizes PSAT1 (phosphoserine aminotransferase 1), a critical enzyme for serine synthesis, to trigger PRKAA-dependent autophagy initiation and inhibit RAB11A-mediated autophagosome-lysosome fusion, resulting in lethal autophagy arrest in GBM cells. Maintenance of PSAT1 at a high level is essential for regorafenib-induced GBM suppression. Together, our data provide novel mechanistic insights of regorafenib-induced autophagy arrest and suggest a new paradigm for effective treatment of GBM.Abbreviations: 3-MA: 3-methyladenine; ACACA: acetyl coenzyme A carboxylase alpha; ACTB/ß-actin: actin, beta; AMPK: adenosine monophosphate-activated protein kinase; ATG5: autophagy related 5; CTSD: cathepsin D; DN-: dominant-negative; GBM: glioblastoma multiforme; LAMP1: lysosomal-associated membrane protein 1; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; PIK3C3/VPS34: phosphatidylinositol 3-kinase catalytic subunit type 3; PRKAA/AMPKα: protein kinase AMP-activated catalytic subunit alpha; PSAT1: phosphoserine aminotransferase 1; SQSTM1/p62: sequestosome 1; TKIs: tyrosine kinase inhibitors.


Assuntos
Autofagia/efeitos dos fármacos , Glioblastoma/tratamento farmacológico , Compostos de Fenilureia/farmacologia , Piridinas/farmacologia , Transaminases/efeitos dos fármacos , Proteínas Quinases Ativadas por AMP/metabolismo , Autofagia/fisiologia , Proteína 5 Relacionada à Autofagia/efeitos dos fármacos , Glioblastoma/patologia , Humanos , Proteínas Associadas aos Microtúbulos , Proteína Sequestossoma-1/metabolismo , Transdução de Sinais/efeitos dos fármacos , Serina-Treonina Quinases TOR/efeitos dos fármacos , Serina-Treonina Quinases TOR/metabolismo
6.
Rev Soc Bras Med Trop ; 52: e20180526, 2019 Sep 05.
Artigo em Inglês | MEDLINE | ID: mdl-31508780

RESUMO

INTRODUCTION: Crotalus envenomations cause serious complications and can be fatal without appropriate treatment. Venom isoforms present and inter/intraspecific variations in the venom composition can result in different symptoms presented by bites by snakes from the same species but from different geographical regions. We comparatively evaluated the local and systemic effects caused by Crotalus durissus terrificus (Cdt), C.d. collilineatus (Cdcolli), and C.d. cascavella (Cdcasc) envenomation. METHODS: Venom chromatography was performed. Proteolytic, phospholipase, and LAAO activities were analyzed. Edema, myotoxicity, hepatotoxicity, nephrotoxicity, and coagulation alterations were evaluated. RESULTS: The venom SDS-PAGE analyses found the presence of convulxin, gyroxin, crotoxin, and crotamine in Cdt and Cdcolli venoms. Crotamine was not present in the Cdcasc venom. Cdt, Cdcollli, and Cdcasc venoms had no proteolytic activity. Only Cdcasc and Cdt venoms had phospholipase activity. LAAO activity was observed in Cdcolli and Cdcasc venoms. Cdcolli and Cdcasc venoms caused 36.7% and 13.3% edema increases, respectively. Cdt venom caused a 10% edema induction compared to those by other venoms. All venoms increased TOTAL-CK, MB-CK, and LDH levels (indicating muscle injury) and ALT, AST, GGT, and ALP levels (markers of liver damage) and were able to induce a neuromuscular blockade. Urea and creatinine levels were also altered in both plasma and urine, indicating kidney damage. Only Cdcolli and Cdcasc venoms increased TAPP and TAP. CONCLUSIONS: Together, these results allow us to draw a distinction between local and systemic effects caused by Crotalus subspecies, highlighting the clinical and biochemical effects produced by their respective venoms.


Assuntos
Venenos de Crotalídeos/toxicidade , Crotalus/classificação , Edema/induzido quimicamente , Rim/efeitos dos fármacos , Fígado/efeitos dos fármacos , Fosfatase Alcalina/sangue , Fosfatase Alcalina/efeitos dos fármacos , Animais , Creatina Quinase/sangue , Creatina Quinase/efeitos dos fármacos , Creatinina/sangue , Edema/patologia , Eletroforese em Gel de Poliacrilamida , Rim/patologia , L-Lactato Desidrogenase/sangue , L-Lactato Desidrogenase/efeitos dos fármacos , Fígado/patologia , Camundongos , Modelos Animais , Transaminases/sangue , Transaminases/efeitos dos fármacos , Ureia/sangue
7.
Pharm. pract. (Granada, Internet) ; 17(1): 0-0, ene.-mar. 2019. tab, graf
Artigo em Inglês | IBECS | ID: ibc-184607

RESUMO

Background: Turmeric and its curcumin extract have been evaluated in patients with nonalcoholic fatty liver disease (NAFLD), a common ailment that can lead to irreparable liver damage. Objective: To identify the evidence supporting the use of turmeric or curcumin therapy in NAFLD. Methods: We searched PubMed, EMBASE, and Cochrane Central from the earliest possible date to 12/17/18 including terms for turmeric, curcumin, and NAFLD. We assessed the impact of turmeric or its curcumin extract on alanine transaminase (ALT), aspartate transaminase (AST), and NAFLD severity via ultrasound. Results: Five trials assessed the comparative efficacy of curcumin/turmeric in NAFLD. One trial was single armed with comparisons only versus baseline and another trial was only available in abstract form. All of the trials had small sample sizes, 4 of 5 trials had limited durations of follow-up, and all trials had methodological limitations that negatively impacted the strength and applicability of evidence. Clinical and methodological heterogeneity precluded statistical pooling. Three of the 4 trials with evaluable data for turmeric or curcumin versus their own baseline demonstrated significant reductions in ALT, AST, and NAFLD severity grade. Two of the 4 placebo controlled trials had significant mean difference reductions in ALT and AST for turmeric or curcumin versus placebo while 2 of 3 of these trials found significant reductions in NAFLD severity grade. Among these trials, only one used turmeric instead of a curcumin extract and this turmeric trial did not demonstrate any differences in ALT, AST, or NAFLD severity between the turmeric and placebo groups. Conclusions: Curcumin extract is a promising, but not proven, treatment for NAFLD while the role for turmeric is less clear. The general findings are that ALT, AST and NAFLD severity are reduced with the use of curcumin


No disponible


Assuntos
Humanos , Curcumina/uso terapêutico , Fígado Gorduroso/tratamento farmacológico , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Transaminases/efeitos dos fármacos , Testes de Função Hepática/estatística & dados numéricos , Resultado do Tratamento
8.
Rev. Soc. Bras. Med. Trop ; 52: e20180526, 2019. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1020439

RESUMO

Abstract INTRODUCTION: Crotalus envenomations cause serious complications and can be fatal without appropriate treatment. Venom isoforms present and inter/intraspecific variations in the venom composition can result in different symptoms presented by bites by snakes from the same species but from different geographical regions. We comparatively evaluated the local and systemic effects caused by Crotalus durissus terrificus (Cdt), C.d. collilineatus (Cdcolli), and C.d. cascavella (Cdcasc) envenomation. METHODS: Venom chromatography was performed. Proteolytic, phospholipase, and LAAO activities were analyzed. Edema, myotoxicity, hepatotoxicity, nephrotoxicity, and coagulation alterations were evaluated. RESULTS: The venom SDS-PAGE analyses found the presence of convulxin, gyroxin, crotoxin, and crotamine in Cdt and Cdcolli venoms. Crotamine was not present in the Cdcasc venom. Cdt, Cdcollli, and Cdcasc venoms had no proteolytic activity. Only Cdcasc and Cdt venoms had phospholipase activity. LAAO activity was observed in Cdcolli and Cdcasc venoms. Cdcolli and Cdcasc venoms caused 36.7% and 13.3% edema increases, respectively. Cdt venom caused a 10% edema induction compared to those by other venoms. All venoms increased TOTAL-CK, MB-CK, and LDH levels (indicating muscle injury) and ALT, AST, GGT, and ALP levels (markers of liver damage) and were able to induce a neuromuscular blockade. Urea and creatinine levels were also altered in both plasma and urine, indicating kidney damage. Only Cdcolli and Cdcasc venoms increased TAPP and TAP. CONCLUSIONS: Together, these results allow us to draw a distinction between local and systemic effects caused by Crotalus subspecies, highlighting the clinical and biochemical effects produced by their respective venoms.


Assuntos
Animais , Crotalus/classificação , Venenos de Crotalídeos/toxicidade , Edema/induzido quimicamente , Rim/efeitos dos fármacos , Fígado/efeitos dos fármacos , Ureia/sangue , Creatina Quinase/efeitos dos fármacos , Creatina Quinase/sangue , Creatinina/sangue , Modelos Animais , Edema/patologia , Eletroforese em Gel de Poliacrilamida , Fosfatase Alcalina/efeitos dos fármacos , Fosfatase Alcalina/sangue , Transaminases/efeitos dos fármacos , Transaminases/sangue , Rim/patologia , L-Lactato Desidrogenase/efeitos dos fármacos , L-Lactato Desidrogenase/sangue , Fígado/patologia , Camundongos
9.
Am J Hematol ; 93(11): 1318-1326, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30094870

RESUMO

Duvelisib (IPI-145), an oral, dual inhibitor of phosphoinositide-3-kinase (PI3K)-δ and -γ, was evaluated in a Phase 1 study in advanced hematologic malignancies, which included expansion cohorts in relapsed/refractory (RR) chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL) and treatment-naïve (TN) CLL. Per protocol, TN patients were at least 65 years old or had a del(17p)/TP53 mutation. Duvelisib was administered twice daily (BID) in 28-day cycles at doses of 8-75 mg in RR patients (n = 55) and 25 mg in TN patients (n = 18.) Diarrhea was the most common nonhematologic AE (TN 78%, RR 47%); transaminase elevations the most frequent lab-abnormality AE (TN 33.3%, RR 30.9%); and neutropenia the most common ≥grade 3 AE (RR 44%, TN 33%). The overall response rates were 56.4% for RR patients (1.8% CR, 54.5% PR) and 83.3% for TN patients (all PRs); median response duration was 21.0 months in RR patients but was not reached for TN patients. Based upon phase 1 efficacy, pharmacodynamics, and safety, duvelisib 25 mg BID was selected for further investigation in a phase 3 study in RR CLL/SLL.


Assuntos
Isoquinolinas/administração & dosagem , Leucemia Linfocítica Crônica de Células B/tratamento farmacológico , Purinas/administração & dosagem , Adulto , Idoso , Feminino , Humanos , Isoquinolinas/efeitos adversos , Isoquinolinas/farmacocinética , Leucemia Linfocítica Crônica de Células B/complicações , Masculino , Pessoa de Meia-Idade , Neutropenia/induzido quimicamente , Inibidores de Fosfoinositídeo-3 Quinase , Purinas/efeitos adversos , Purinas/farmacocinética , Indução de Remissão/métodos , Transaminases/efeitos dos fármacos , Resultado do Tratamento
10.
Am J Hematol ; 93(11): 1311-1317, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30033575

RESUMO

Duvelisib (IPI-145) is an oral dual inhibitor of phosphoinositide-3-kinase (PI3K)-δ and -γ in clinical development for the treatment of hematologic malignancies, including indolent non-Hodgkin lymphoma (iNHL). In a Phase 1, open-label study to determine the maximum tolerated dose (MTD), pharmacokinetics, pharmacodynamics, clinical activity, and safety of duvelisib monotherapy in patients with advanced hematologic malignancies, duvelisib was administered at eight dose levels (8-100 mg BID) in a dose-escalation phase (n = 31 evaluable patients). Two dose-limiting toxicities (DLTs), Grade 3 transaminase elevations and Grade 3 rash, occurred at 100 mg BID, and the MTD was determined to be 75 mg BID. Across all doses, 58.1% of iNHL patients had a response (19.4% complete, 35.5% partial, and 3.2% minor); median time to response was 1.84 months and duration of response was 16.9 months. Median progression-free survival was 14.7 months, and the probability of overall survival at 24 months was 71.7%. Severe (Grade ≥ 3) adverse events included elevated liver enzymes (38.7%), diarrhea (25.8%), and neutropenia (29.0%). Three patients, all in the 75 mg BID cohort, experienced fatal AEs: E. coli sepsis, acute respiratory failure, and fungal pneumonia. No iNHL patients experienced Pneumocystis pneumonia. Duvelisib demonstrated favorable clinical activity and an acceptable safety profile in these high-risk, heavily pretreated, relapsed/refractory iNHL patients, with 25 mg BID selected for further clinical development.


Assuntos
Isoquinolinas/administração & dosagem , Linfoma não Hodgkin/tratamento farmacológico , Purinas/administração & dosagem , Adulto , Idoso , Exantema/induzido quimicamente , Feminino , Humanos , Isoquinolinas/toxicidade , Linfoma não Hodgkin/complicações , Linfoma não Hodgkin/mortalidade , Masculino , Dose Máxima Tolerável , Pessoa de Meia-Idade , Inibidores de Fosfoinositídeo-3 Quinase , Purinas/toxicidade , Análise de Sobrevida , Transaminases/efeitos dos fármacos , Resultado do Tratamento
11.
Parasitology ; 145(2): 184-195, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-27804891

RESUMO

Tuberculosis is an infectious disease associated with significant mortality and morbidity worldwide, particularly in developing countries. The rise of antibiotic resistance in Mycobacterium tuberculosis (Mtb) urgently demands the development of new drug leads to tackle resistant strains. Fragment-based methods have recently emerged at the forefront of pharmaceutical development as a means to generate more effective lead structures, via the identification of fragment molecules that form weak but high quality interactions with the target biomolecule and subsequent fragment optimization. This review highlights a number of novel inhibitors of Mtb targets that have been developed through fragment-based approaches in recent years.


Assuntos
Proteínas de Bactérias/efeitos dos fármacos , Descoberta de Drogas/métodos , Mycobacterium tuberculosis/efeitos dos fármacos , Tuberculose/tratamento farmacológico , Sistema Enzimático do Citocromo P-450/efeitos dos fármacos , Humanos , Peptídeo Sintases/antagonistas & inibidores , Peptídeo Sintases/efeitos dos fármacos , Proteínas Repressoras/efeitos dos fármacos , Transaminases/efeitos dos fármacos , Tuberculose/microbiologia
12.
ACS Infect Dis ; 3(11): 854-865, 2017 11 10.
Artigo em Inglês | MEDLINE | ID: mdl-28942642

RESUMO

The continuing rise of multidrug resistant pathogens has made it clear that in the absence of new antibiotics we are moving toward a "postantibiotic" world, in which even routine infections will become increasingly untreatable. There is a clear need for the development of new antibiotics with truly novel mechanisms of action to combat multidrug resistant pathogens. Experimental evolution to resistance can be a useful tactic for the characterization of the biochemical mechanism of action for antibiotics of interest. Herein, we demonstrate that the use of a diverse panel of strains with well-annotated reference genomes improves the success of using experimental evolution to characterize the mechanism of action of a novel pyrrolizidinone antibiotic analog. Importantly, we used experimental evolution under conditions that favor strongly polymorphic populations to adapt a panel of three substantially different Gram-positive species (lab strain Bacillus subtilis and clinical strains methicillin-resistant Staphylococcus aureus MRSA131 and Enterococcus faecalis S613) to produce a sufficiently diverse set of evolutionary outcomes. Comparative whole genome sequencing (WGS) between the susceptible starting strain and the resistant strains was then used to identify the genetic changes within each species in response to the pyrrolizidinone. Taken together, the adaptive response across a range of organisms allowed us to develop a readily testable hypothesis for the mechanism of action of the CJ-16 264 analog. In conjunction with mitochondrial inhibition studies, we were able to elucidate that this novel pyrrolizidinone antibiotic is an electron transport chain (ETC) inhibitor. By studying evolution to resistance in a panel of different species of bacteria, we have developed an enhanced method for the characterization of new lead compounds for the discovery of new mechanisms of action.


Assuntos
Antibacterianos/farmacologia , Pirrolidinonas/farmacologia , Transaminases/efeitos dos fármacos , Antibacterianos/química , Evolução Biológica , Farmacorresistência Bacteriana Múltipla , Variação Genética , Genoma Bacteriano , Testes de Sensibilidade Microbiana , Estrutura Molecular , Consumo de Oxigênio , Pirrolidinonas/química , Relação Estrutura-Atividade , Transaminases/genética
13.
Alcohol Alcohol ; 51(1): 20-6, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26224731

RESUMO

AIMS: The tryptophan metabolites 3-hydroxykynurenine (3-HK) and 3-hydroxyanthranilic acid (3-HAA) inhibit the liver mitochondrial low Km aldehyde dehydrogenase and possess alcohol-aversive and immunosuppressant properties. As the disulfiram (DS) metabolite carbon disulphide activates enzymes forming 3-HK and 3-HAA, we investigated if repeated disulfiram treatment increases the hepatic and serum levels of these 2 metabolites. METHODS: Livers and sera of male Wistar rats were analysed for tryptophan and kynurenine metabolites after repeated DS treatment for 7 days. RESULTS: DS increased liver and serum [3-HK] and [3-HAA] possibly by increasing the flux of tryptophan down the hepatic kynurenine pathway and activation of kynurenine hydroxylase and kynureninase. CONCLUSIONS: We provisionally suggest that elevation of some kynurenine metabolites may be an additional mechanism of the alcohol-aversive and anticancer effects of disulfiram.


Assuntos
Ácido 3-Hidroxiantranílico/metabolismo , Dissuasores de Álcool/farmacologia , Dissulfiram/farmacologia , Cinurenina/análogos & derivados , Fígado/efeitos dos fármacos , Animais , Cromatografia Líquida de Alta Pressão , Hidrolases/efeitos dos fármacos , Hidrolases/metabolismo , Cinurenina/efeitos dos fármacos , Cinurenina/metabolismo , Quinurenina 3-Mono-Oxigenase/efeitos dos fármacos , Quinurenina 3-Mono-Oxigenase/metabolismo , Fígado/metabolismo , Masculino , Ratos , Ratos Wistar , Transaminases/efeitos dos fármacos , Transaminases/metabolismo , Triptofano/efeitos dos fármacos , Triptofano/metabolismo
14.
N Engl J Med ; 373(10): 908-19, 2015 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-26332545

RESUMO

BACKGROUND: Current drugs for myeloproliferative neoplasm-associated myelofibrosis, including Janus kinase (JAK) inhibitors, do not induce complete or partial remissions. Imetelstat is a 13-mer lipid-conjugated oligonucleotide that targets the RNA template of human telomerase reverse transcriptase. METHODS: We sought to obtain preliminary information on the therapeutic activity and safety of imetelstat in patients with high-risk or intermediate-2-risk myelofibrosis. Imetelstat was administered as a 2-hour intravenous infusion (starting dose, 9.4 mg per kilogram of body weight) every 1 to 3 weeks. The primary end point was the overall response rate, and the secondary end points were adverse events, spleen response, and independence from red-cell transfusions. RESULTS: A total of 33 patients (median age, 67 years) met the eligibility criteria; 48% had received prior JAK inhibitor therapy. A complete or partial remission occurred in 7 patients (21%), with a median duration of response of 18 months (range, 13 to 20+) for complete responses and 10 months (range, 7 to 10+) for partial responses. Bone marrow fibrosis was reversed in all 4 patients who had a complete response, and a molecular response occurred in 3 of the 4 patients. Response rates were 27% among patients with a JAK2 mutation versus 0% among those without a JAK2 mutation (P=0.30) and 32% among patients without an ASXL1 mutation versus 0% among those with an ASXL1 mutation (P=0.07). The rate of complete response was 38% among patients with a mutation in SF3B1 or U2AF1 versus 4% among patients without a mutation in these genes (P=0.04). Responses did not correlate with baseline telomere length. Treatment-related adverse events included grade 4 thrombocytopenia (in 18% of patients), grade 4 neutropenia (in 12%), grade 3 anemia (in 30%), and grade 1 or 2 elevation in levels of total bilirubin (in 12%), alkaline phosphatase (in 21%), and aspartate aminotransferase (in 27%). CONCLUSIONS: Imetelstat was found to be active in patients with myelofibrosis but also had the potential to cause clinically significant myelosuppression. (Funded by Geron; ClinicalTrials.gov number, NCT01731951.).


Assuntos
Indóis/administração & dosagem , Niacinamida/análogos & derivados , Mielofibrose Primária/tratamento farmacológico , Telomerase/antagonistas & inibidores , Idoso , Células da Medula Óssea/efeitos dos fármacos , Células da Medula Óssea/patologia , Análise Mutacional de DNA , Esquema de Medicação , Feminino , Fibrose/tratamento farmacológico , Humanos , Indóis/efeitos adversos , Infusões Intravenosas , Janus Quinase 2/genética , Masculino , Pessoa de Meia-Idade , Mutação , Niacinamida/administração & dosagem , Niacinamida/efeitos adversos , Oligonucleotídeos , Projetos Piloto , Policitemia Vera/complicações , Mielofibrose Primária/etiologia , Mielofibrose Primária/genética , Indução de Remissão , Trombocitemia Essencial/complicações , Transaminases/efeitos dos fármacos
15.
Acta Med Iran ; 53(6): 351-5, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26069172

RESUMO

The present study has been directed to investigate Ursodeoxycholic Acid (UDCA) effect in children, to reduce the high Liver transaminases induced by Anticonvulsant drugs (drug induced hepatitis). This idea has been driven from Cytoprotective and antioxidant properties of UDCA to be used in drug induced inflammation in Liver. Twenty two epileptic patients aged between 4 mo - 3 yr whom were under anticonvulsant therapy with drugs such as valperoic acid, primidone, levetiracetam, Phenobarbital or any combination of them and had shown Liver transaminases rise , after rule out of Viral-Autoimmune, Metabolic and Anatomic causes, have been prescribed UDCA in dose of 10-15 mg/kg/day, at least for 6 months. Any patient who have shown confusing factors such as genetic disorders with liver involvement or spontaneous decline in enzymes or had not treatment compliance has been excluded from the study. Transaminases range changes as well as Probable side effects of the drug have been monitored. The results indicated that UDCA is effective and well tolerable in the children with drug induced hyper transaminasemia. No side effect has been seen and recorded in this study. Based on this study and its results, we recommend UDCA as a safe and effective choice in drug induced hepatotoxicities.


Assuntos
Anticonvulsivantes/uso terapêutico , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Transaminases/efeitos dos fármacos , Ácido Ursodesoxicólico/farmacologia , Antioxidantes/farmacologia , Pré-Escolar , Feminino , Humanos , Lactente , Testes de Função Hepática , Masculino , Projetos Piloto , Estudos Prospectivos , Transaminases/metabolismo
16.
J Psychiatr Pract ; 20(4): 301-7, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25036587

RESUMO

Olanzapine induced a marked elevation in triglyceride and cholesterol levels and in liver transaminase enzymes after 12 weeks of treatment in a patient with schizophrenia. These changes were not seen in an earlier 10-week course of treatment with risperidone, and improved substantially 1 week after the patient stopped olanzapine and began treatment with aripiprazole. The patient did not exhibit weight gain or hyperglycemia with any of the medications. This case and a review of the literature suggest that olanzapine may have unique properties that affect hepatic enzyme pathways, independent of any effects on weight and glucose, that may lead to hyperlipidemia and transaminitis in some patients.


Assuntos
Antipsicóticos/efeitos adversos , Benzodiazepinas/efeitos adversos , Hipertrigliceridemia/induzido quimicamente , Esquizofrenia/tratamento farmacológico , Transaminases/efeitos dos fármacos , Adulto , Antipsicóticos/administração & dosagem , Antipsicóticos/farmacologia , Aripiprazol , Benzodiazepinas/administração & dosagem , Humanos , Hipertrigliceridemia/sangue , Fígado/efeitos dos fármacos , Fígado/enzimologia , Masculino , Olanzapina , Piperazinas/administração & dosagem , Piperazinas/farmacologia , Quinolonas/administração & dosagem , Quinolonas/farmacologia , Transaminases/sangue , Resultado do Tratamento
17.
Tumori ; 100(6): e301-4, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25688516

RESUMO

In recent years many new agents have been introduced into clinical practice to treat metastatic renal cell carcinoma. Some of these agents are tyrosine kinase inhibitors, which have different adverse events compared to chemotherapy or immunotherapy. We describe the case of a man treated with pazopanib as first-line therapy for metastatic disease, demonstrating the efficacy, good tolerability and easy management of some side effects of this tyrosine kinase inhibitor. The patient, who presented with lung metastases, started therapy in November 2012 and was alive and in continuous response at the time of writing (November 2014). We controlled the elevation of transaminase levels with low-dose corticosteroid administration. The patient had no other significant adverse events (apart from dysgeusia and grade 1 diarrhea), he had good quality of life, and his performance status throughout the treatment was very good (ECOG 0).


Assuntos
Antineoplásicos/uso terapêutico , Carcinoma de Células Renais/tratamento farmacológico , Neoplasias Renais/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/uso terapêutico , Proteínas Tirosina Quinases/antagonistas & inibidores , Pirimidinas/uso terapêutico , Sulfonamidas/uso terapêutico , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Carcinoma de Células Renais/secundário , Esquema de Medicação , Humanos , Indazóis , Neoplasias Renais/patologia , Neoplasias Pulmonares/secundário , Masculino , Pessoa de Meia-Idade , Nefrectomia , Tomografia por Emissão de Pósitrons , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/efeitos adversos , Pirimidinas/administração & dosagem , Pirimidinas/efeitos adversos , Qualidade de Vida , Receptores de Fatores de Crescimento do Endotélio Vascular/antagonistas & inibidores , Sulfonamidas/administração & dosagem , Sulfonamidas/efeitos adversos , Tomografia Computadorizada por Raios X , Transaminases/sangue , Transaminases/efeitos dos fármacos , Resultado do Tratamento
18.
Molecules ; 18(7): 7570-83, 2013 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-23812249

RESUMO

Nowadays there is an increase in the number of people taking herbals worldwide. Scutia buxifolia is used for the treatment of hypertension, but little is known about its action on liver. Thirty-two Wistar rats were divided into four groups: control and groups treated during 30 days with 100, 200 and 400 mg of lyophilized aqueous extract of S. buxifolia (SBSB)/kg of body weight. This study was planned to explore hepatotoxic effect of SBSB, which was assessed by serum transaminases (ALT and AST). Thiobarbituric acid reactive substances (TBARS) levels were determined in liver, along with thiols content (NPSH), catalase (CAT) activity and, superoxide dismutase (SOD) enzymes. Histopathological studies of liver tissue were performed. Flavonoids and phenolics were quantified in SBSB by high performance liquid chromatography with diode array detection (HPLC/DAD). We did not observe alterations on redox status (TBARS, NPSH, CAT and, SOD) in the control and experimental groups. An increase on AST activity was only observed at 200 mg of SBSB, whereas ALT score was not affected by SBSB. Moreover, no morphological alterations were observed on the hepatocytes, matching the analysed biochemical parameters. This way, we conclude that SBSB was not toxic.


Assuntos
Fígado/efeitos dos fármacos , Extratos Vegetais/toxicidade , Rhamnaceae/metabolismo , Animais , Antioxidantes/análise , Catalase/efeitos dos fármacos , Catalase/metabolismo , Flavonoides/análise , Medicina Herbária , Testes de Função Hepática , Oxirredução/efeitos dos fármacos , Ratos , Ratos Wistar , Superóxido Dismutase/efeitos dos fármacos , Superóxido Dismutase/metabolismo , Substâncias Reativas com Ácido Tiobarbitúrico/análise , Transaminases/efeitos dos fármacos
20.
Hepatology ; 55(5): 1369-78, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22183915

RESUMO

UNLABELLED: Hepatic fat accumulation and changes in lipid composition are hallmarks of nonalcoholic fatty liver disease (NAFLD). As an experimental approach for treatment of NAFLD, we synthesized the bile acid-phospholipid conjugate ursodeoxycholyl lysophosphatidylethanolamide (UDCA-LPE). Previous work demonstrated profound hepatoprotective properties of the conjugate in vitro and in vivo. Here we investigated the effects of UDCA-LPE in two nutritional mouse models of NAFLD. C57BL/6 mice were fed a high-fat diet (HFD) for 28 weeks, resulting in steatosis with hyperlipidemia. In a second model, mice received a methionin-choline-deficient (MCD) diet for up to 11 weeks, which induced advanced nonalcoholic steatohepatitis (NASH). Establishment of liver injury was followed by intraperitoneal injections of 30 mg/kg UDCA-LPE three times a week for different time periods. UDCA-LPE ameliorated both HFD- and MCD-induced increases in alanine aminotransferase (ALT) values near to normalization. As for metabolic parameters, UDCA-LPE reduced elevated serum triglyceride and cholesterol values in HFD mice. Liver histology showed improvement of steatosis in HFD and MCD mice concomitant with reductions in hepatic triglyceride and cholesterol levels. Additionally, the conjugate lowered serum caspase-8 activity in both models and decreased lipid hydroperoxides in MCD mice. Abundance of proinflammatory lysophosphatidylcholine (LPC), which was detectable in both HFD and MCD mice, was reduced by UDCA-LPE. Quantitative reverse transcriptase-polymerase chain reaction qRT-PCR of liver specimens revealed that UDCA-LPE strongly down-regulated inflammatory genes and modified the expression of genes involved in lipid metabolism. CONCLUSION: The current study demonstrates that UDCA-LPE improves hepatic injury at different stages of NAFLD. By concurrently lowering hepatic lipid overloading as well as susceptibility of hepatocytes toward inflammatory stimuli, the conjugate may be able to ameliorate disease progression. Thus, UDCA-LPE represents a promising compound suitable for the treatment of NAFLD.


Assuntos
Fígado Gorduroso/tratamento farmacológico , Fígado Gorduroso/patologia , Transaminases/metabolismo , Ácido Ursodesoxicólico/farmacologia , Animais , Biópsia por Agulha , Caspase 8/efeitos dos fármacos , Caspase 8/metabolismo , Dieta , Modelos Animais de Doenças , Regulação para Baixo , Hepatite/tratamento farmacológico , Hepatite/patologia , Imuno-Histoquímica , Peroxidação de Lipídeos/efeitos dos fármacos , Peroxidação de Lipídeos/fisiologia , Lipogênese/efeitos dos fármacos , Lipogênese/genética , Testes de Função Hepática , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Hepatopatia Gordurosa não Alcoólica , Distribuição Aleatória , Reação em Cadeia da Polimerase em Tempo Real/métodos , Sensibilidade e Especificidade , Transaminases/efeitos dos fármacos , Triglicerídeos/metabolismo
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