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1.
Acta Dermatovenerol Alp Pannonica Adriat ; 33(3): 141-143, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39324352

RESUMO

INTRODUCTION: Cellulite, also known as edematous fibrosclerotic panniculopathy (EFP), affects up to 90% of women and has a significant aesthetic impact. EFP is a multifactorial condition characterized by local circulatory changes, increased adipose tissue thickness, and a fibrotic response involving thick collagen bundles and septa, driven by local hypoxia. Although numerous treatments exist, their effects are typically temporary. This study evaluates the outcomes of four patients with EFP treated using a combined recombinant enzymatic therapy consisting of a lyase, lipase, and collagenase. METHODS: A standardized protocol involving injections of a combined enzyme solution (pbserum Medium™) was administered to the lower limbs in three separate sessions. Pre- and post-treatment photographs were collected for comparative analysis. RESULTS: All four patients showed improvements in skin appearance and fibrosis, with no systemic or local adverse events reported. CONCLUSIONS: We propose that a treatment strategy targeting the edematous, adipose, and fibrotic components of EFP may offer an economical and pathogenic-based approach for managing this condition in affected women.


Assuntos
Celulite , Humanos , Feminino , Celulite/terapia , Celulite/tratamento farmacológico , Adulto , Pessoa de Meia-Idade , Colagenases/uso terapêutico , Lipase/uso terapêutico , Lipase/sangue , Resultado do Tratamento , Terapia Enzimática
2.
Life Sci ; 353: 122920, 2024 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-39047898

RESUMO

AIMS: Antibiotic resistance including multidrug resistance (MDR) is a negative symbol to the human health system because it loses the capability to treat infections. Unfortunately, the available antibiotics do not show an effective therapeutic response against bacterial infections. In the situation of global antibiotic unresponsiveness, enzymatic therapy especially in combinatorial form seems an effective approach to control bacterial infection and combat resistance. The article is important because it focuses on combinatorial enzymatic therapy that has multiple properties (effective antibacterial performances, antibiofilm capacity, immunomodulators, targeted actions, synergistic actions, multiple targeting, and resistance-proof properties) and can address antibiotic resistance effectively. MATERIALS AND METHODS: We searched the related topics with Pubmed, Scopus, and Google Scholar databases and finally 73 relevant papers were reviewed in detail and cited in this article. KEY FINDINGS: Discusses properties of combinatorial therapeutic enzymes made it an accomplished means over antibiotic therapy. This article discusses the need for combinatorial enzymatic therapy against bacterial infection, its distinguished features, and properties with multi-mechanistic antibacterial action. It discussed the European Medicine Agency and Food and Drug Administration-approved therapeutic enzymes (antibacterial and antibiofilm). SIGNIFICANCE: This article provided the possible combination of the enzyme that may be used as an antibacterial agent along with limitations and future scope of combinatorial antibacterial enzymatic agents. This article could draw the attention of researchers to combinatorial therapeutic enzymatic molecules as effective and futuristic therapy to overcome the problem of multiple antibiotic resistance in bacteria.


Assuntos
Antibacterianos , Bactérias , Infecções Bacterianas , Biofilmes , Farmacorresistência Bacteriana Múltipla , Farmacorresistência Bacteriana Múltipla/efeitos dos fármacos , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Humanos , Infecções Bacterianas/tratamento farmacológico , Bactérias/efeitos dos fármacos , Biofilmes/efeitos dos fármacos , Animais , Terapia Enzimática , Enzimas/metabolismo , Enzimas/farmacologia
3.
Artigo em Inglês | MEDLINE | ID: mdl-38955512

RESUMO

Enzyme-based therapy has garnered significant attention for its current applications in various diseases. Despite the notable advantages associated with the use of enzymes as therapeutic agents, that could have high selectivity, affinity, and specificity for the target, their application faces challenges linked to physico-chemical and pharmacological properties. These limitations can be addressed through the encapsulation of enzymes in nanoplatforms as a comprehensive solution to mitigate their degradation, loss of activity, off-target accumulation, and immunogenicity, thus enhancing bioavailability, therapeutic efficacy, and circulation time, thereby reducing the number of administrations, and ameliorating patient compliance. The exploration of novel nanomedicine-based enzyme therapeutics for the treatment of challenging diseases stands as a paramount goal in the contemporary scientific landscape, but even then it is often not enough. Combining an enzyme with another therapeutic (e.g., a small molecule, another enzyme or protein, a monoclonal antibody, or a nucleic acid) within a single nanocarrier provides innovative multidrug-integrated therapy and ensures that both the actives arrive at the target site and exert their therapeutic effect, leading to synergistic action and superior therapeutic efficacy. Moreover, this strategic approach could be extended to gene therapy, a field that nowadays has gained increasing attention, as enzymes acting at genomic level and nucleic acids may be combined for synergistic therapy. This multicomponent therapeutic approach opens opportunities for promising future developments. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Neurological Disease Therapeutic Approaches and Drug Discovery > Nanomedicine for Oncologic Disease Therapeutic Approaches and Drug Discovery > Emerging Technologies.


Assuntos
Terapia Enzimática , Nanomedicina , Humanos , Animais
4.
J Control Release ; 372: 619-647, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38909702

RESUMO

In recent years, enzyme therapy strategies have rapidly evolved to catalyze essential biochemical reactions with therapeutic potential. These approaches hold particular promise in addressing rare genetic disorders, cancer treatment, neurodegenerative conditions, wound healing, inflammation management, and infectious disease control, among others. There are several primary reasons for the utilization of enzymes as therapeutics: their substrate specificity, their biological compatibility, and their ability to generate a high number of product molecules per enzyme unit. These features have encouraged their application in enzyme replacement therapy where the enzyme serves as the therapeutic agent to rectify abnormal metabolic and physiological processes, enzyme prodrug therapy where the enzyme initiates a clinical effect by activating prodrugs, and enzyme dynamic or starving therapy where the enzyme acts upon host substrate molecules. Currently, there are >20 commercialized products based on therapeutic enzymes, but approval rates are considerably lower than other biologicals. This has stimulated nanobiotechnology in the last years to develop nanoparticle-based solutions that integrate therapeutic enzymes. This approach aims to enhance stability, prevent rapid clearance, reduce immunogenicity, and even enable spatio-temporal activation of the therapeutic catalyst. This comprehensive review delves into emerging trends in the application of therapeutic enzymes, with a particular emphasis on the synergistic opportunities presented by incorporating enzymes into nanomaterials. Such integration holds the promise of enhancing existing therapies or even paving the way for innovative nanotherapeutic approaches.


Assuntos
Terapia Enzimática , Nanoestruturas , Humanos , Terapia Enzimática/métodos , Animais , Nanoestruturas/química , Enzimas/administração & dosagem , Enzimas/metabolismo , Enzimas/química , Pró-Fármacos/administração & dosagem , Pró-Fármacos/uso terapêutico , Terapia de Reposição de Enzimas/métodos
5.
Eur J Neurol ; 31(9): e16324, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38693756

RESUMO

Neuronal ceroid lipofuscinosis type 2 (CLN2) disease is a rare, lysosomal storage disorder that causes pediatric onset neurodegenerative disease. It is characterized by mutations in the TPP1 gene. Symptoms begin between 2 and 4 years of age with loss of previously acquired motor, cognitive, and language abilities. Cerliponase alfa, a recombinant human TPP1 enzyme, is the only approved therapy. We report the first presymptomatic cerliponase alfa intraventricular treatment in a familial case of CLN2 related to a classical TPP1 variant. Sister 1 presented with motor, cognitive, and language decline and progressive myoclonic epilepsy since the age of 3 years, evolved with severe diffuse encephalopathy, received no specific treatment, and died at 11 years. Sister 2 had a CLN2 presymptomatic diagnosis and has been treated with cerliponase since she was 12 months old. She is now 6 years 8 months and has no CLN2 symptom except one generalized seizure 1 year ago. No serious adverse event has occurred. Repeated Wechsler Preschool and Primary Scale of Intelligence, Fourth Edition standardized index scores are heterogeneous in the extremely low to low average ranges. Mean length of utterances, a global index of sentence complexity, showed a delay, but a gradual improvement. The reported case enhances the major contribution of presymptomatic diagnosis and significant middle-term treatment benefit for patients with CLN2.


Assuntos
Aminopeptidases , Dipeptidil Peptidases e Tripeptidil Peptidases , Lipofuscinoses Ceroides Neuronais , Serina Proteases , Tripeptidil-Peptidase 1 , Humanos , Lipofuscinoses Ceroides Neuronais/genética , Lipofuscinoses Ceroides Neuronais/tratamento farmacológico , Lipofuscinoses Ceroides Neuronais/complicações , Dipeptidil Peptidases e Tripeptidil Peptidases/genética , Feminino , Serina Proteases/genética , Aminopeptidases/genética , Proteínas Recombinantes/uso terapêutico , Proteínas Recombinantes/administração & dosagem , Criança , Terapia Enzimática
6.
Molecules ; 29(7)2024 Mar 28.
Artigo em Inglês | MEDLINE | ID: mdl-38611800

RESUMO

4-Chloroisocoumarin compounds have broad inhibitory properties against serine proteases. Here, we show that selected 3-alkoxy-4-chloroisocoumarins preferentially inhibit the activity of the conserved serine protease High-temperature requirement A of Chlamydia trachomatis. The synthesis of a new series of isocoumarin-based scaffolds has been developed, and their anti-chlamydial properties were investigated. The structure of the alkoxy substituent was found to influence the potency of the compounds against High-temperature requirement A, and modifications to the C-7 position of the 3-alkoxy-4-chloroisocoumarin structure attenuate anti-chlamydial properties.


Assuntos
Álcoois , Chlamydia trachomatis , Inibidores de Proteases , Inibidores de Proteases/farmacologia , Terapia Enzimática , Isocumarinas , Serina Endopeptidases , Serina Proteases
7.
J Control Release ; 367: 76-92, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38262488

RESUMO

Glucose oxidase (GOx)-based enzyme therapeutics are potential alternatives for colorectal cancer (CRC) treatment via glucose consumption and accumulation of hydrogen peroxide (H2O2). Given that H2O2 can be eliminated by cytoprotective autophagy, autophagy inhibitors that can interrupt autolysosome-induced H2O2 elimination are promising combination drugs of GOx. Here, we developed a multifunctional biomimetic nanocarrier for effective co-delivery of an autophagy inhibitor-chloroquine phosphate (CQP) and GOx to exert their synergistic effect by irreversibly upregulating intracellular reactive oxygen species (ROS) levels. Poly (D, l-lactide-co-glycolide) (PLGA) nanoparticles (NPs) were used to encapsulate both GOx and CQP using a W/O/W multi-emulsion method. Calcium phosphate (CaP) was used to "fix" CQP to GOx in the internal water phase, where it served as a pH-sensitive unit to facilitate intracellular drug release. Folic acid-modified red blood cell membranes (FR) were used to camouflage the GOx/CQP/CaP encapsulated PLGA NPs (referred to as PLGA/GCC@FR). In an AOM/DSS-induced CRC mouse model, PLGA/GCC@FR exhibited improved antitumor effects, in which the number of tumor nodes were only a quarter of that in the free drug combination group. The enhanced therapeutic effects of PLGA/GCC@FR were attributed to the prolonged tumor retention which was verified by both dynamic in vivo imaging and drug biodistribution. This multifunctional biomimetic nanocarrier facilitated combined enzyme therapeutics by depleting glucose and augmenting intracellular ROS levels in tumor cells, which exerted a synergistic inhibitory effect on tumor growth. Therefore, this study proposed a novel strategy for the enhancement of combined enzyme therapeutics, which provided a promising method for effective CRC treatment.


Assuntos
Neoplasias Colorretais , Nanopartículas , Neoplasias , Animais , Camundongos , Óxidos , Glucose/metabolismo , Biomimética , Peróxido de Hidrogênio/metabolismo , Espécies Reativas de Oxigênio , Distribuição Tecidual , Neoplasias/metabolismo , Copolímero de Ácido Poliláctico e Ácido Poliglicólico/metabolismo , Terapia Enzimática , Neoplasias Colorretais/tratamento farmacológico , Glucose Oxidase , Linhagem Celular Tumoral
8.
Int J Mol Sci ; 24(24)2023 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-38139411

RESUMO

Papillary subtypes of renal-cell carcinoma (pRCC) represent 10-15% of the cases and commonly have MET alterations. This systematic review and single-arm meta-analysis evaluated MET inhibitor therapy (METi) efficacy and safety in adults with confirmed advanced pRCC. The search strategy included PubMed, Web-of-science, Cochrane, and Scopus. We used the DerSimonian/Laird random effect model for all analyses; p-value < 5% was considered significant, and heterogeneity was assessed with I2. Three clinical trials and six cohort studies were included with 504 patients; 31% were MET-driven. Our pooled analysis demonstrated an objective response rate (ORR) in MET-driven, MET-independent, and overall patients of: 36% (95%CI: 10-62), 0% (95%CI: 0-3), and 21% (95%CI: 1-41), respectively. One-year disease control and progression-free survival rates were, respectively, 70% (95%CI: 52-88) and 15% (95%CI: 10-20). Twelve- and twenty-four-month survival rates were, respectively, 43% (95%CI: 23-64) and 10% (95%CI: 0-30). The prevalence of adverse events of any grade and grades 3-5 were 96% (95%CI: 91-100) and 44% (95%CI: 37-50), respectively. We suggest METi has anti-tumor activity and is tolerable in patients with advanced pRCC.


Assuntos
Carcinoma de Células Renais , Neoplasias Renais , Adulto , Humanos , Carcinoma de Células Renais/tratamento farmacológico , Carcinoma de Células Renais/patologia , Estudos de Coortes , Terapia Enzimática , Neoplasias Renais/patologia , Inibidores de Proteínas Quinases/efeitos adversos
10.
Sci Rep ; 13(1): 18199, 2023 10 24.
Artigo em Inglês | MEDLINE | ID: mdl-37875583

RESUMO

Response to tyrosine kinase inhibitor (TKI) therapy in patients with chronic myeloid leukemia (CML) is monitored by quantification of BCR::ABL1 transcript levels. Milestones for assessing optimal treatment response have been defined in adult CML patients and are applied to children and adolescents although it is questionable whether transferability to pediatric patients is appropriate regarding genetic and clinical differences. Therefore, we analyzed the molecular response kinetics to TKI therapy in 129 pediatric CML patients and investigated whether response assessment based on continuous references can support an early individual therapy adjustment. We applied a moving quantiles approach to establish a high-resolution response target curve and contrasted the median responses in all patients with the median of the ideal target curve obtained from a subgroup of optimal responders. The high-resolution response target curve of the optimal responder group presents a valuable tool for continuous therapy monitoring of individual pediatric CML patients in addition to the fixed milestones. By further comparing BCR::ABL1 transcript levels with BCR::ABL1 fusion gene copy numbers, it is also possible to model the differential dynamics of BCR::ABL1 expression and cell number under therapy. The developed methodology can be transferred to other biomarkers for continuous therapy monitoring.


Assuntos
Proteínas de Fusão bcr-abl , Leucemia Mielogênica Crônica BCR-ABL Positiva , Adulto , Humanos , Criança , Adolescente , Proteínas de Fusão bcr-abl/genética , Proteínas de Fusão bcr-abl/metabolismo , Inibidores de Proteínas Quinases/uso terapêutico , Inibidores de Proteínas Quinases/farmacologia , Leucemia Mielogênica Crônica BCR-ABL Positiva/tratamento farmacológico , Leucemia Mielogênica Crônica BCR-ABL Positiva/genética , Terapia de Alvo Molecular , Terapia Enzimática
11.
Am J Respir Crit Care Med ; 208(12): 1305-1315, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-37820359

RESUMO

Rationale: Assessing the early use of video-assisted thoracoscopic surgery (VATS) or intrapleural enzyme therapy (IET) in pleural infection requires a phase III randomized controlled trial (RCT). Objectives: To establish the feasibility of randomization in a surgery-versus-nonsurgery trial as well as the key outcome measures that are important to identify relevant patient-centered outcomes in a subsequent RCT. Methods: The MIST-3 (third Multicenter Intrapleural Sepsis Trial) was a prospective multicenter RCT involving eight U.K. centers combining on-site and off-site surgical services. The study enrolled all patients with a confirmed diagnosis of pleural infection and randomized those with ongoing pleural sepsis after an initial period (as long as 24 h) of standard care to one of three treatment arms: continued standard care, early IET, or a surgical opinion with regard to early VATS. The primary outcome was feasibility based on >50% of eligible patients being successfully randomized, >95% of randomized participants retained to discharge, and >80% of randomized participants retained to 2 weeks of follow-up. The analysis was performed per intention to treat. Measurements and Main Results: Of 97 eligible patients, 60 (62%) were randomized, with 100% retained to discharge and 84% retained to 2 weeks. Baseline demographic, clinical, and microbiological characteristics of the patients were similar across groups. Median times to intervention were 1.0 and 3.5 days in the IET and surgery groups, respectively (P = 0.02). Despite the difference in time to intervention, length of stay (from randomization to discharge) was similar in both intervention arms (7 d) compared with standard care (10 d) (P = 0.70). There were no significant intergroup differences in 2-month readmission and further intervention, although the study was not adequately powered for this outcome. Compared with VATS, IET demonstrated a larger improvement in mean EuroQol five-dimension health utility index (five-level edition) from baseline (0.35) to 2 months (0.83) (P = 0.023). One serious adverse event was reported in the VATS arm. Conclusions: This is the first multicenter RCT of early IET versus early surgery in pleural infection. Despite the logistical challenges posed by the coronavirus disease (COVID-19) pandemic, the study met its predefined feasibility criteria, demonstrated potential shortening of length of stay with early surgery, and signals toward earlier resolution of pain and a shortened recovery with IET. The study findings suggest that a definitive phase III study is feasible but highlights important considerations and significant modifications to the design that would be required to adequately assess optimal initial management in pleural infection.The trial was registered on ISRCTN (number 18,192,121).


Assuntos
Doenças Transmissíveis , Doenças Pleurais , Sepse , Humanos , Cirurgia Torácica Vídeoassistida/efeitos adversos , Estudos de Viabilidade , Doenças Transmissíveis/etiologia , Sepse/tratamento farmacológico , Sepse/cirurgia , Sepse/etiologia , Terapia Enzimática
12.
Soins Pediatr Pueric ; 44(334): 40-46, 2023.
Artigo em Francês | MEDLINE | ID: mdl-37813520

RESUMO

The six pediatric care units of the Assistance publique - Hôpitaux de Paris home hospitalization service provide daily care for 150 children. A small proportion are treated for enzyme-deficiency diseases at the reference centers of the Necker-Enfants malades and Armand-Trousseau hospitals. Treatment consists of a weekly injection of enzyme therapy, lasting from three to five hours. In order to reduce the time spent by the nursery nurse, while guaranteeing the quality and safety of care, a team discussion led to the drafting of a procedure for harmonizing practices and empowering families to carry out this enzymotherapy injection.


Assuntos
Serviços de Assistência Domiciliar , Hospitais , Criança , Humanos , Hospitalização , Terapia Enzimática
13.
Molecules ; 28(17)2023 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-37687159

RESUMO

The use of protease inhibitors in human immunodeficiency virus type 1 (HIV-1) treatment is limited by adverse effects, including metabolic complications. To address these challenges, efforts are underway in the pursuit of more potent and less toxic HIV-1 protease inhibitors. Repurposing existing drugs offers a promising avenue to expedite the drug discovery process, saving both time and costs compared to conventional de novo drug development. This study screened FDA-approved and investigational drugs in the DrugBank database for their potential as HIV-1 protease inhibitors. Molecular docking studies and cell-based assays, including anti-HIV-1 in vitro assays and XTT cell viability tests, were conducted to evaluate their efficacy. The study findings revealed that CBR003PS, an antibiotic currently in clinical use, and CBR013PS, an investigational drug for treating endometriosis and uterine fibroids, exhibited significant binding affinity to the HIV-1 protease with high stability. Their EC50 values, measured at 100% cell viability, were 9.4 nM and 36.6 nM, respectively. Furthermore, cell-based assays demonstrated that these two compounds showed promising results, with therapeutic indexes higher than 32. In summary, based on their favorable therapeutic indexes, CBR003PS and CBR013PS show potential for repurposing as HIV-1 protease inhibitors.


Assuntos
HIV-1 , Inibidores de Proteases , Feminino , Humanos , Inibidores de Proteases/farmacologia , Simulação de Acoplamento Molecular , Terapia Enzimática , Antibacterianos , Drogas em Investigação
14.
Molecules ; 28(17)2023 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-37687169

RESUMO

The CD13 inhibitor ubenimex is used as an adjuvant drug with chemotherapy for the treatment of cancer due to its function as an immunoenhancer, but it has limitations in its cytotoxic efficacy. The proteasome inhibitor ixazomib is a landmark drug in the treatment of multiple myeloma with a high anti-cancer activity. Herein, we conjugated the pharmacophore of ubenimex and the boric acid of ixazomib to obtain a dual CD13 and proteasome inhibitor 7 (BC-05). BC-05 exhibited potent inhibitory activity on both human CD13 (IC50 = 0.13 µM) and the 20S proteasome (IC50 = 1.39 µM). Although BC-05 displayed lower anti-proliferative activity than that of ixazomib in vitro, an advantage was established in the in vivo anti-cancer efficacy and prolongation of survival time, which may be due to its anti-metastatic and immune-stimulating activity. A pharmacokinetic study revealed that BC-05 is a potentially orally active agent with an F% value of 24.9%. Moreover, BC-05 showed more favorable safety profiles than those of ixazomib in preliminary toxicity studies. Overall, the results indicate that BC-05 is a promising drug candidate for the treatment of multiple myeloma.


Assuntos
Mieloma Múltiplo , Inibidores de Proteassoma , Humanos , Inibidores de Proteassoma/farmacologia , Mieloma Múltiplo/tratamento farmacológico , Terapia Enzimática , Antivirais
15.
Int J Mol Sci ; 24(14)2023 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-37511325

RESUMO

Serpin family A member 1 (SERPINA1) encodes a protease inhibitor participating in many human diseases, but its value in immunoregulation and prognosis of human cancers remains unclear. In this study, through comprehensive analysis of data from The Cancer Genome Atlas (TCGA) datasets, we found that SERPINA1 was dysregulated in many cancers compared with normal tissues. SERPINA1 expression was significantly associated with prognosis, immune subtype, molecular subtype, immune checkpoint (ICP) genes, tumor mutational burden (TMB), microsatellite instability (MSI), and the estimation of stromal and immune cells in malignant tumor tissues using expression data (ESTIMATE) score. There was a strong connection between SERPINA1 expression and tumor-infiltrating lymphocytes, and SERPINA1 showed significant relation to gene markers of immune cells in digestive tumors. Fluorescence-based multiplex immunohistochemistry confirmed that SERPINA1 protein expression was related to clinicopathologic features and immune infiltrates in hepatic cancer. This study suggests that SERPINA can potentially serve as a novel biomarker for cancer prognosis and immunotherapy.


Assuntos
Neoplasias Hepáticas , Humanos , Antivirais , Terapia Enzimática , Neoplasias Hepáticas/genética , Prognóstico , Inibidores de Proteases
16.
J Inherit Metab Dis ; 46(6): 1089-1103, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37494004

RESUMO

Maple syrup urine disease (MSUD) is an inborn error of branched-chain amino acid metabolism affecting several thousand individuals worldwide. MSUD patients have elevated levels of plasma leucine and its metabolic product α-ketoisocaproate (KIC), which can lead to severe neurotoxicity, coma, and death. Patients must maintain a strict diet of protein restriction and medical formula, and periods of noncompliance or illness can lead to acute metabolic decompensation or cumulative neurological impairment. Given the lack of therapeutic options for MSUD patients, we sought to develop an oral enzyme therapy that can degrade leucine within the gastrointestinal tract prior to its systemic absorption and thus enable patients to maintain acceptable plasma leucine levels while broadening their access to natural protein. We identified a highly active leucine decarboxylase enzyme from Planctomycetaceae bacterium and used directed evolution to engineer the enzyme for stability to gastric and intestinal conditions. Following high-throughput screening of over 12 000 enzyme variants over 9 iterative rounds of evolution, we identified a lead variant, LDCv10, which retains activity following simulated gastric or intestinal conditions in vitro. In intermediate MSUD mice or healthy nonhuman primates given a whey protein meal, oral treatment with LDCv10 suppressed the spike in plasma leucine and KIC and reduced the leucine area under the curve in a dose-dependent manner. Reduction in plasma leucine correlated with decreased brain leucine levels following oral LDCv10 treatment. Collectively, these data support further development of LDCv10 as a potential new therapy for MSUD patients.


Assuntos
Doença da Urina de Xarope de Bordo , Humanos , Camundongos , Animais , Leucina , Aminoácidos de Cadeia Ramificada , Proteínas , Terapia Enzimática , Primatas/metabolismo
17.
Pediatr Hematol Oncol ; 40(4): 422-428, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36125320

RESUMO

This case reports concomitant use of enzyme and substrate reduction therapy to improve chemotherapy adherence in a pediatric patient diagnosed with Ewing sarcoma (ES) and type 1 Gaucher disease (GD). The 17-year-old female presented with 5 months of right knee pain with associated mass on exam. She was diagnosed with ES with pulmonary metastasis. The patient was treated with 17 alternating cycles of vincristine-doxorubicin-cyclophosphamide and ifosfamide and etoposide chemotherapy followed by tumor resection and radiation per standard protocol. As part of her staging work-up, bone marrow biopsy was performed, significant for Gaucher cells. After the second cycle of chemotherapy the patient began to experience severe delays averaging 30 days between cycles compared to 17.29 days observed in Children's Oncology Group data. Given her bone marrow biopsy findings and chemotherapy delays GD screening was obtained and the patient was diagnosed with GD following genetic confirmation. Due to delays in chemotherapy decreasing chance of remission, the patient was referred to Genetics for aggressive management with imiglucerase and eliglustat. After initiation of therapy the period between chemotherapy cycles decreased to 23 days on average, with a 21% increase in platelet count during therapy. The patient was able to complete ES therapy achieving remission. GD is associated with an increased risk of malignancy, as seen in our patient with ES. GD patients experience prolonged hematologic cytopenia during cancer treatment. Combining Enzyme and Substrate Reduction Therapies should be investigated as an option to improve chemotherapy adherence in GD patients.


Assuntos
Neoplasias Ósseas , Doença de Gaucher , Sarcoma de Ewing , Feminino , Humanos , Criança , Adolescente , Sarcoma de Ewing/tratamento farmacológico , Doença de Gaucher/tratamento farmacológico , Neoplasias Ósseas/tratamento farmacológico , Neoplasias Ósseas/patologia , Ciclofosfamida/uso terapêutico , Etoposídeo , Protocolos de Quimioterapia Combinada Antineoplásica , Ifosfamida , Doxorrubicina/uso terapêutico , Vincristina , Terapia Enzimática
18.
Rev. méd. Chile ; 150(12): 1555-1564, dic. 2022. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-1515396

RESUMO

BACKGROUND: Alcohol and tobacco are important risk factors for chronic pancreatitis (CP). AIM: To analyze the effect of etiological factors such as tobacco and alcohol and pancreatic enzyme replacement therapy (PERT) in the progression of CP. MATERIAL AND METHODS: Patients with a diagnosis of CP were recruited and grouped according to variables such as tobacco, alcohol and PERT. They were followed for 18 months. Subsequently, different variables and analytical parameters involved in the progression of the disease were analyzed. RESULTS: A total of 50 patients diagnosed with CP were included. Of these, 28 patients underwent PERT, 39 were smokers and 33 were alcohol users. Compared with patients without PERT, those with PERT had a higher proportion of diabetes (64 and 32%, respectively), had a higher need for endoscopic treatment (25 and 0%, respectively) and a normal body mass index (71 and 27.3%, respectively. The smokers had higher calcium levels and increased lymphocytosis and leukocytosis. The alcohol consumption group had a higher mean age (p = 0.04) CONCLUSIONS: PERT may improve the nutritional status but does not reduce the need for endoscopic or surgical treatment. Smoking and alcohol consumption favored the progression of CP. Also, smoking induced a pro-inflammatory state.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Pancreatite Crônica/etiologia , Pancreatite Crônica/terapia , Pancreatite Crônica/epidemiologia , Pâncreas , Insuficiência Pancreática Exócrina/etiologia , Insuficiência Pancreática Exócrina/terapia , Nicotiana/efeitos adversos , Consumo de Bebidas Alcoólicas/efeitos adversos , Fatores de Risco , Distribuição por Sexo , Progressão da Doença , Terapia Enzimática
19.
Chest ; 162(6): 1384-1392, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35716828

RESUMO

BACKGROUND: Combination intrapleural fibrinolytic and enzyme therapy (IET) has been established as a therapeutic option in pleural infection. Despite demonstrated efficacy, studies specifically designed and adequately powered to address complications are sparse. The safety profile, the effects of concurrent therapeutic anticoagulation, and the nature and extent of nonbleeding complications remain poorly defined. RESEARCH QUESTION: What is the bleeding complication risk associated with IET use in pleural infection? STUDY DESIGN AND METHODS: This was a multicenter, retrospective observational study conducted in 24 centers across the United States and the United Kingdom. Protocolized data collection for 1,851 patients treated with at least one dose of combination IET for pleural infection between January 2012 and May 2019 was undertaken. The primary outcome was the overall incidence of pleural bleeding defined using pre hoc criteria. RESULTS: Overall, pleural bleeding occurred in 76 of 1,833 patients (4.1%; 95% CI, 3.0%-5.0%). Using a half-dose regimen (tissue plasminogen activator, 5 mg) did not change this risk significantly (6/172 [3.5%]; P = .68). Therapeutic anticoagulation alongside IET was associated with increased bleeding rates (19/197 [9.6%]) compared with temporarily withholding anticoagulation before administration of IET (3/118 [2.6%]; P = .017). As well as systemic anticoagulation, increasing RAPID score, elevated serum urea, and platelets of < 100 × 109/L were associated with a significant increase in bleeding risk. However, only RAPID score and use of systemic anticoagulation were independently predictive. Apart from pain, non-bleeding complications were rare. INTERPRETATION: IET use in pleural infection confers a low overall bleeding risk. Increased rates of pleural bleeding are associated with concurrent use of anticoagulation but can be mitigated by withholding anticoagulation before IET. Concomitant administration of IET and therapeutic anticoagulation should be avoided. Parameters related to higher IET-related bleeding have been identified that may lead to altered risk thresholds for treatment.


Assuntos
Doenças Transmissíveis , Empiema Pleural , Doenças Pleurais , Derrame Pleural , Humanos , Ativador de Plasminogênio Tecidual/efeitos adversos , Fibrinolíticos/efeitos adversos , Estudos Retrospectivos , Derrame Pleural/complicações , Doenças Pleurais/complicações , Hemorragia/induzido quimicamente , Hemorragia/epidemiologia , Terapia Enzimática , Empiema Pleural/tratamento farmacológico , Empiema Pleural/epidemiologia , Empiema Pleural/complicações
20.
Science ; 376(6589): 147, 2022 04 08.
Artigo em Inglês | MEDLINE | ID: mdl-35389804
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