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1.
Eur J Oncol Nurs ; 70: 102569, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38593535

RESUMO

PURPOSE: Dysgeusia is a common side effect in oncology patients, significantly impacting their quality of life. This systematic review aims to evaluate the effectiveness of non-pharmacological strategies in treating dysgeusia in patients undergoing chemotherapy or radiotherapy. METHODS: Adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we conducted a comprehensive literature search across five databases: PubMed, Embase, Cochrane Library, CINAHL, and the British Nursing Database. We used the Joanna Briggs Institute Critical Appraisal Tools to assess the quality of the included studies. A harvest plot was used to synthesise evidence about the differential effects of population-level interventions. RESULTS: Nine studies of non-pharmacological strategies to manage dysgeusia were included. These studies encompassed a variety of interventions, including oral applications and supplements, instrumental techniques, and educational programs. The review identified promising interventions such as cryotherapy and Miraculine supplementation, which showed potential in mitigating taste alterations. Instrumental techniques like photobiomodulation therapy and complementary and integrative medicine approaches, including acupuncture and herbs, were also found to be beneficial. Educational and self-management strategies emerged as effective interventions for empowering patients to manage dysgeusia. Despite the diversity of interventions and the limitations of the included studies, such as small sample sizes and geographical differences, these findings underscore the potential of non-pharmacological strategies in managing dysgeusia. CONCLUSION: The results support the integration of these strategies into clinical practice, highlighting the importance of multidisciplinary approaches to improve patient care. Further research should prioritize rigorous studies to enhance evidence and explore long-term effects.


Assuntos
Antineoplásicos , Disgeusia , Neoplasias , Feminino , Humanos , Masculino , Antineoplásicos/efeitos adversos , Terapias Complementares/métodos , Disgeusia/induzido quimicamente , Neoplasias/tratamento farmacológico , Neoplasias/complicações , Qualidade de Vida
2.
J Craniofac Surg ; 35(1): e8-e11, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37609997

RESUMO

PURPOSE: The aim was to evaluate the safety and effectiveness of a computed tomography-guided surgery implant placement with a flapless technique and immediate functional loading in an American Society of Anesthesiology-III patient. METHODS: This technical note involved a 64-year-old American Society of Anesthesiology-III patient. Her hopeless teeth were extracted and a restorative evaluation was provided as a prosthetic reference. The surgical procedure was based on the flapless technique that let us to use local anesthesia. The authors used an All-on-4 concept restoration for maxilla and conventional fixed prosthesis procedures for jaw rehabilitation. The authors placed 4 tilted implants in the upper maxilla and 6 right implants in the jaw. Implants were loaded with a provisional prosthesis on the same day of surgery. Five months later, provisional restoration was removed; the authors placed into the ceramic crowns 2 Procera Implant Bridge (Nobel Biocare) frameworks, developed through computer-aided design/computer-aided manufacturing technology. CONCLUSIONS: Computed tomography-guided surgery is a minimally invasive technique that allows, through a flapless approach, safer and more predictable procedures. In this technical note, the authors achieved accurate implant placement and precise fit of restoration with natural looking appearance; this patient-oriented-treatment led to a reduced healing time with better compliance.


Assuntos
Anestesiologia , Implantes Dentários , Carga Imediata em Implante Dentário , Arcada Edêntula , Cirurgia Assistida por Computador , Humanos , Feminino , Pessoa de Meia-Idade , Implantação Dentária Endóssea/métodos , Tomografia Computadorizada por Raios X , Carga Imediata em Implante Dentário/métodos , Prótese Dentária Fixada por Implante , Maxila/cirurgia , Arcada Edêntula/cirurgia , Resultado do Tratamento
3.
Eur J Dent ; 18(1): 392-396, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37311550

RESUMO

This clinical case report's objective was to describe an alternative technique executed to ensure bone regeneration after removing a cystic lesion in the upper jaw. The bone defect after the cystectomy was filled with autologous fibrin-rich clots containing concentrated growth factor (CGF). A 45-year-old female patient was presumed to have a cystic lesion with massive bone destruction on the vestibular and palatal walls between teeth 2.2 and 2.3. CGF was applied to fill the gap to promote the development of the bone. The tooth was asymptomatic and repair was still increasing steadily after a year, according to the results of the clinical and radiological follow-up assessment. This article describes a different way to treat a two-wall defect involving both the palatal and buccal bone, after removing a cystic lesion, with the use of CGF as an equivalent to the traditional use of autologous or heterologous bone. A promising substance for bone repair is CGF fibrin, which may encourage the growth of new bone in jaw deformities and promote bone tissue healing.

4.
Br J Haematol ; 204(1): 306-314, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37990447

RESUMO

Haemochromatosis (HC) encompasses a range of genetic disorders. HFE-HC is by far the most common in adults, while non-HFE types are rare due to mutations of HJV, HAMP, TFR2 and gain-of-function mutations of SLC40A1. HC is often unknown to paediatricians as it is usually asymptomatic in childhood. We report clinical and biochemical data from 24 paediatric cases of HC (10 cases of HFE-, 5 TFR2-, 9 HJV-HC), with a median follow-up of 9.6 years. Unlike in the adult population, non-HFE-HC constitutes 58% (14/24) of the population in our series. Transferrin saturation was significantly higher in TFR2- and HJV-HC compared to HFE-HC, and serum ferritin and LIC were higher in HJV-HC compared to TFR2- and HFE-HC. Most HFE-HC subjects had relatively low ferritin and LIC at the time of diagnosis, so therapy could be postponed for most of them after the age of 18. Our results confirm that HJV-HC is a severe form already in childhood, emphasizing the importance of early diagnosis and treatment to avoid the development of organ damage and reduce morbidity and mortality. Although phlebotomies were tolerated by most patients, oral iron chelators could be a valid option in early-onset HC.


Assuntos
Hemocromatose , Sobrecarga de Ferro , Adulto , Humanos , Criança , Hemocromatose/diagnóstico , Hemocromatose/genética , Hemocromatose/terapia , Estudos Retrospectivos , Proteína da Hemocromatose/genética , Mutação , Ferritinas , Antígenos de Histocompatibilidade Classe I/genética , Sobrecarga de Ferro/genética
5.
J Cancer Res Clin Oncol ; 149(9): 5773-5779, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36577902

RESUMO

BACKGROUND: The emerging use of direct oral anticoagulants (DOAC) in the management of cancer-associated venous thromboembolism (CAT) is significantly improving therapeutic adherence and quality of life. Despite this, many conditions can restrict the therapeutic index of these drugs. For all these reasons the latest guidelines recommend the use of heparins in the treatment of CAT as the preferred treatment in some clinical settings. OBJECTIVES: We evaluated the efficacy and the safety of DOAC, in terms of recurrent venous thromboembolism (VTE) and major bleeding (MB), as a composite primary outcome. Mortality and clinically relevant non-major bleeding (CRNMB) were evaluated as secondary outcomes. METHODS: We performed a retrospective study on 209 patients to compare the effects of DOAC versus heparins for the treatment of CAT. 127 patients with a high bleeding risk neoplasia were enrolled. RESULTS: A primary-outcome event occurred in 11.3% of patients treated with heparins and in 10.5% treated with DOAC (Relative Risk 0.92; 95% CI 0.42-2.01, p = 0.84). Recurrent VTE occurred in 6.1% in the heparins group and in 8.4% in the DOAC group (RR 1.37; 95% CI 0.51-3.64, p = 0.52). MB occurred in 5.2% in the heparins group and in 2.1% in the DOAC group (RR 0.40; 95% CI 0.08-1.93, p = 0.25). CONCLUSIONS: DOAC seem to be as effective and safe as heparins in the treatment of CAT. Most bleeding events occurred in patients with high-risk bleeding neoplasms regardless of the type of anticoagulant. Considering the characteristics and satisfaction of patients using DOAC in this setting, this approach should be considered as a first choice.


Assuntos
Neoplasias , Tromboembolia Venosa , Humanos , Tromboembolia Venosa/tratamento farmacológico , Tromboembolia Venosa/etiologia , Estudos Retrospectivos , Qualidade de Vida , Anticoagulantes/efeitos adversos , Heparina/efeitos adversos , Hemorragia/induzido quimicamente , Hemorragia/complicações , Hemorragia/tratamento farmacológico , Neoplasias/complicações , Neoplasias/tratamento farmacológico , Administração Oral
6.
Front Pediatr ; 10: 1031687, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36419910

RESUMO

Myelofibrosis is a rare myeloproliferative disorder. The detailed descriptions of myelofibrosis in children and adolescents is limited to a few case series and case reports describing fewer than 100 patients, thus suggesting the extreme rarity of this condition prior to adulthood. Though pediatric patients rarely present the typical features and outcomes usually observed in older people, pediatric myelofibrosis is not considered an independent entity. Here we aim to describe patients with pediatric myelofibrosis, showing different clinical and pathological features when compared to the World Health Organization 2016 Primary Myelofibrosis classification. We retrospectively collected and analyzed 14 consecutive pediatric myelofibrosis diagnosed in our Pediatric hematology outpatient clinic over a six-year period. According to clinical data and bone marrow biopsy findings, patients were classified into three subgroups: adult-like myelofibrosis, pediatric immune myelofibrosis, idiopathic myelofibrosis. Pediatric Immune Myelofibrosis was the predominant subgroup in our cohort (7/14). Pediatric Immune Myelofibrosis is characterized by peculiar bone marrow features (i.e., T lymphocyte infiltration) and a milder course compared to the other patients Pediatric Immune Myelofibrosis is a novel and distinct pathological entity. We suggest to carefully consider Pediatric Immune Myelofibrosis in case of bone marrow biopsies showing myelofibrosis that do not fulfill WHO criteria.

7.
PLoS Med ; 19(3): e1003827, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-35324910

RESUMO

BACKGROUND: Violence against women and girls (VAWG) is a human rights violation with social, economic, and health consequences for survivors, perpetrators, and society. Robust evidence on economic, social, and health impact, plus the cost of delivery of VAWG prevention, is critical to making the case for investment, particularly in low- and middle-income countries (LMICs) where health sector resources are highly constrained. We report on the costs and health impact of VAWG prevention in 6 countries. METHODS AND FINDINGS: We conducted a trial-based cost-effectiveness analysis of VAWG prevention interventions using primary data from 5 randomised controlled trials (RCTs) in sub-Saharan Africa and 1 in South Asia. We evaluated 2 school-based interventions aimed at adolescents (11 to 14 years old) and 2 workshop-based (small group or one to one) interventions, 1 community-based intervention, and 1 combined small group and community-based programme all aimed at adult men and women (18+ years old). All interventions were delivered between 2015 and 2018 and were compared to a do-nothing scenario, except for one of the school-based interventions (government-mandated programme) and for the combined intervention (access to financial services in small groups). We computed the health burden from VAWG with disability-adjusted life year (DALY). We estimated per capita DALYs averted using statistical models that reflect each trial's design and any baseline imbalances. We report cost-effectiveness as cost per DALY averted and characterise uncertainty in the estimates with probabilistic sensitivity analysis (PSA) and cost-effectiveness acceptability curves (CEACs), which show the probability of cost-effectiveness at different thresholds. We report a subgroup analysis of the small group component of the combined intervention and no other subgroup analysis. We also report an impact inventory to illustrate interventions' socioeconomic impact beyond health. We use a 3% discount rate for investment costs and a 1-year time horizon, assuming no effects post the intervention period. From a health sector perspective, the cost per DALY averted varies between US$222 (2018), for an established gender attitudes and harmful social norms change community-based intervention in Ghana, to US$17,548 (2018) for a livelihoods intervention in South Africa. Taking a societal perspective and including wider economic impact improves the cost-effectiveness of some interventions but reduces others. For example, interventions with positive economic impacts, often those with explicit economic goals, offset implementation costs and achieve more favourable cost-effectiveness ratios. Results are robust to sensitivity analyses. Our DALYs include a subset of the health consequences of VAWG exposure; we assume no mortality impact from any of the health consequences included in the DALYs calculations. In both cases, we may be underestimating overall health impact. We also do not report on participants' health costs. CONCLUSIONS: We demonstrate that investment in established community-based VAWG prevention interventions can improve population health in LMICs, even within highly constrained health budgets. However, several VAWG prevention interventions require further modification to achieve affordability and cost-effectiveness at scale. Broadening the range of social, health, and economic outcomes captured in future cost-effectiveness assessments remains critical to justifying the investment urgently required to prevent VAWG globally.


Assuntos
Países em Desenvolvimento , Pobreza , Adolescente , Adulto , Criança , Análise Custo-Benefício , Feminino , Humanos , Masculino , África do Sul , Violência/prevenção & controle
8.
Cancers (Basel) ; 14(4)2022 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-35205831

RESUMO

Bleomycin is a chemotherapy agent that, when administered systemically, can cause severe pulmonary toxicity. Bleosome is a novel formulation of bleomycin encapsulated in ultra-deformable (UD) liposomes that may be applicable as a topical chemotherapy for diseases such as non-melanoma skin cancer. To date, the ability of Bleosome to effectively penetrate through the skin has not been evaluated. In this study, we investigated the ability of Bleosome to penetrate through ex vivo skin explants from dogs and horses. We visualized the penetration of UD liposomes through the skin by transmission electron microscopy. However, to effectively image the drug itself we fluorescently labeled bleomycin prior to encapsulation within liposomes and utilized multiphoton microscopy. We showed that UD liposomes do not penetrate beyond the stratum corneum, whereas bleomycin is released from UD liposomes and can penetrate to the deeper layers of the epidermis. This is the first study to show that Bleosome can effectively penetrate through the skin. We speculate that UD liposomes are penetration enhancers in that UD liposomes carry bleomycin through the outer skin to the stratum corneum and then release the drug, allowing diffusion into the deeper layers. Our results are comparative in dogs and horses and warrant further studies on the efficacy of Bleosome as topical treatment.

9.
J Cachexia Sarcopenia Muscle ; 13(2): 1360-1372, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35083887

RESUMO

BACKGROUND: Duchenne muscular dystrophy (DMD) is caused by DMD mutations leading to dystrophin loss. Full-length Dp427 is the primary dystrophin isoform expressed in muscle and is also expressed in the central nervous system (CNS). Two shorter isoforms, Dp140 and Dp71, are highly expressed in the CNS. While a role for Dp140 and Dp71 on DMD CNS comorbidities is well known, relationships between mutations expected to disrupt Dp140 and Dp71 and motor outcomes are not. METHODS: Functional outcome data from 387 DMD boys aged 4-15 years were subdivided by DMD mutation expected effects on dystrophin isoform expression; Group 1 (Dp427 absent, Dp140/Dp71 present, n = 201); Group 2 (Dp427/Dp140 absent, Dp71 present, n = 152); and Group 3 (Dp427/Dp140/Dp71 absent, n = 34). Relationships between isoform group and North Star ambulatory assessment (NSAA) scores, 10 m walk/run velocities and rise time velocities were explored using regression analysis. Western blot analysis was used to study Dp427, Dp140 and Dp71 production in myogenic cells (control and DMD human), control skeletal muscle, DMD skeletal muscle from the three isoform groups and cerebral cortex from mice (wild-type and DMD models). Grip strength and rotarod running test were studied in wild-type mice and DMD mouse models. DMD mouse models were mdx (Dp427 absent, Dp140/Dp71 present), mdx52 (Dp427/Dp140 absent, Dp71 present) and DMD-null (lacking all isoforms). RESULTS: In DMD boys, mean NSAA scores at 5 years of age were 6.1 points lower in Group 3 than Group 1 (P < 0.01) and 4.9 points lower in Group 3 than Group 2 (P = 0.05). Mean peak NSAA scores were 4.0 points lower in Group 3 than Group 1 (P < 0.01) and 1.6 points lower in Group 2 than Group 1 (P = 0.04). Mean four-limb grip strength was 1.5 g/g lower in mdx52 than mdx mice (P = 0.003) and 1.5 g/g lower in DMD-null than mdx mice (P = 0.002). Dp71 was produced in myogenic cells (control and DMD human) and skeletal muscle from humans in Groups 1 and 2 and mdx mice, but not skeletal muscle from human controls, myogenic cells and skeletal muscle from humans in Group 3 or skeletal muscle from wild-type, mdx52 or DMD-null mice. CONCLUSIONS: Our results highlight the importance of considering expected effects of DMD mutations on dystrophin isoform production when considering patterns of DMD motor impairment and the implications for clinical practice and clinical trials. Our results suggest a complex relationship between dystrophin isoforms expressed in the brain and DMD motor function.


Assuntos
Distrofina , Distrofia Muscular de Duchenne , Animais , Distrofina/genética , Distrofina/metabolismo , Humanos , Camundongos , Camundongos Endogâmicos mdx , Músculo Esquelético/metabolismo , Distrofia Muscular de Duchenne/genética , Isoformas de Proteínas/genética , Isoformas de Proteínas/metabolismo
10.
Acta Paediatr ; 110(2): 643-651, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33025591

RESUMO

AIM: To evaluate the cumulative prevalence of coeliac disease, systemic lupus erythematosus, autoimmune hyperthyroidism and primary immunodeficiencies in children with either newly diagnosed/persistent or chronic immune thrombocytopenia (ITP). METHODS: Monocentric retrospective analysis of the clinical and biochemical features of 330 consecutive patients with ITP referred to our Pediatric Hematology Unit between January 2009 and December 2018. RESULTS: The prevalence of systemic lupus erythematosus (0.3%), coeliac disease (0.3%) and autoimmune hyperthyroidism (0.6%) was not increased compared to general paediatric population. Of note, the prevalence of underlying primary immunodeficiencies was 2.4%, remarkably higher than the general paediatric population (P = .005). All the patients diagnosed with immunodeficiency developed either bi-/trilinear cytopenia or splenomegaly. CONCLUSION: Whilst autoimmune and immunological screening is already recommended at the onset of immune thrombocytopenia, we recommend that primary immunodeficiencies be regularly screened during follow-up, especially in case of additional cytopenia or lymphoproliferation.


Assuntos
Doença Celíaca , Hipertireoidismo , Lúpus Eritematoso Sistêmico , Púrpura Trombocitopênica Idiopática , Doença Celíaca/complicações , Doença Celíaca/epidemiologia , Criança , Humanos , Lúpus Eritematoso Sistêmico/complicações , Lúpus Eritematoso Sistêmico/epidemiologia , Púrpura Trombocitopênica Idiopática/epidemiologia , Púrpura Trombocitopênica Idiopática/etiologia , Estudos Retrospectivos
11.
EMBO Mol Med ; 12(12): e12357, 2020 12 07.
Artigo em Inglês | MEDLINE | ID: mdl-33210465

RESUMO

Directional cell migration is a critical process underlying morphogenesis and post-natal tissue regeneration. During embryonic myogenesis, migration of skeletal myogenic progenitors is essential to generate the anlagen of limbs, diaphragm and tongue, whereas in post-natal skeletal muscles, migration of muscle satellite (stem) cells towards regions of injury is necessary for repair and regeneration of muscle fibres. Additionally, safe and efficient migration of transplanted cells is critical in cell therapies, both allogeneic and autologous. Although various myogenic cell types have been administered intramuscularly or intravascularly, functional restoration has not been achieved yet in patients with degenerative diseases affecting multiple large muscles. One of the key reasons for this negative outcome is the limited migration of donor cells, which hinders the overall cell engraftment potential. Here, we review mechanisms of myogenic stem/progenitor cell migration during skeletal muscle development and post-natal regeneration. Furthermore, strategies utilised to improve migratory capacity of myogenic cells are examined in order to identify potential treatments that may be applied to future transplantation protocols.


Assuntos
Movimento Celular , Desenvolvimento Muscular , Músculo Esquelético/citologia , Animais , Humanos , Fibras Musculares Esqueléticas/citologia , Células Satélites de Músculo Esquelético/citologia
13.
Stem Cell Reports ; 12(3): 461-473, 2019 03 05.
Artigo em Inglês | MEDLINE | ID: mdl-30745033

RESUMO

Satellite cells are responsible for skeletal muscle regeneration. Upon activation, they proliferate as transient amplifying myoblasts, most of which fuse into regenerating myofibers. Despite their remarkable differentiation potential, these cells have limited migration capacity, which curtails clinical use for widespread forms of muscular dystrophy. Conversely, skeletal muscle perivascular cells have less myogenic potential but better migration capacity than satellite cells. Here we show that modulation of Notch and PDGF pathways, involved in developmental specification of pericytes, induces perivascular cell features in adult mouse and human satellite cell-derived myoblasts. DLL4 and PDGF-BB-treated cells express markers of perivascular cells and associate with endothelial networks while also upregulating markers of satellite cell self-renewal. Moreover, treated cells acquire trans-endothelial migration ability while remaining capable of engrafting skeletal muscle upon intramuscular transplantation. These results extend our understanding of muscle stem cell fate plasticity and provide a druggable pathway with clinical relevance for muscle cell therapy.


Assuntos
Biomarcadores/metabolismo , Movimento Celular/fisiologia , Receptores Notch/metabolismo , Receptores do Fator de Crescimento Derivado de Plaquetas/metabolismo , Células Satélites de Músculo Esquelético/metabolismo , Transdução de Sinais/fisiologia , Células-Tronco/metabolismo , Animais , Células Endoteliais/metabolismo , Humanos , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Proteínas de Membrana/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Desenvolvimento Muscular/fisiologia , Músculo Esquelético/metabolismo , Mioblastos/metabolismo , Pericitos/metabolismo , Regeneração/fisiologia , Regulação para Cima/fisiologia
14.
Ophthalmic Genet ; 39(4): 532-538, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29902089

RESUMO

BACKGROUND: 22q11.2 microduplication is a relatively recently recognized syndrome. Findings in affected individuals range from apparent normality to a wide variety of systemic and ocular conditions. We describe the association between 22q11.2 microduplication and juvenile glaucoma in two brothers. MATERIALS AND METHODS: We reviewed ophthalmological, genetic, and hematological medical records of two patients and their unaffected mother. RESULTS: A 2.07 Mb interstitial duplication in 22q11.21 and a smaller 182 kb duplication in 22q11.23 were identified in both subjects. Patient 1 showed an initial intraocular pressure (IOP) of 15 mmHg in right eye (RE) and 32 mmHg in left eye (LE) under maximum medical treatment. Deep sclerectomy surgery in LE was converted to trabeculectomy due to a macroperforation of the trabeculo-descemetic membrane. Postoperatively, the patient developed persistent hypotony with retinal folds, while IOP in RE increased to 28 mmHg. Trabeculectomy in RE was also complicated by persistent hypotony. Autologous blood injection was performed, resulting in an increase in both visual acuity and IOP. Patient 2 presented with an IOP of 29 mmHg in RE and 33 mmHg in LE. We planned an elective trabeculectomy and added orally administered acetazolamide. The patient developed bilinear cytopenia that contraindicated the surgical procedure. After hematologic normalization, the patient underwent trabeculectomy in LE, causing persistent hypotony. We performed deep sclerectomy surgery in RE, without any significant intra- or post-operative complications. CONCLUSIONS: 22q11.2 microduplication syndrome can be associated with juvenile glaucoma. Trabeculectomy may be complicated by persistent hypotony. Deep sclerectomy appears to be a better surgical option, although the presence of a thin sclera may result in conversion to trabeculectomy.


Assuntos
Anormalidades Múltiplas/genética , Duplicação Cromossômica/genética , Síndrome de DiGeorge/genética , Glaucoma de Ângulo Aberto/genética , Adulto , Cromossomos Humanos Par 22/genética , Cirurgia Filtrante , Glaucoma de Ângulo Aberto/diagnóstico , Glaucoma de Ângulo Aberto/cirurgia , Gonioscopia , Humanos , Pressão Intraocular , Masculino , Estudos Retrospectivos , Tonometria Ocular , Acuidade Visual/fisiologia , Campos Visuais/fisiologia , Adulto Jovem
15.
Haematologica ; 103(1): 107-115, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29079599

RESUMO

The prognostic value of minimal residual disease (MRD) in Philadelphia-chromosome-positive (Ph+) childhood acute lymphoblastic leukemia (ALL) treated with tyrosine kinase inhibitors is not fully established. We detected MRD by real-time quantitative polymerase chain reaction (RQ-PCR) of rearranged immunoglobulin/T-cell receptor genes (IG/TR) and/or BCR/ABL1 fusion transcript to investigate its predictive value in patients receiving Berlin-Frankfurt-Münster (BFM) high-risk (HR) therapy and post-induction intermittent imatinib (the European intergroup study of post-induction treatment of Philadelphia-chromosome-positive acute lymphoblastic leukemia (EsPhALL) study). MRD was monitored after induction (time point (TP)1), consolidation Phase IB (TP2), HR Blocks, reinductions, and at the end of therapy. MRD negativity progressively increased over time, both by IG/TR and BCR/ABL1. Of 90 patients with IG/TR MRD at TP1, nine were negative and none relapsed, while 11 with MRD<5×10-4 and 70 with MRD≥5×10-4 had a comparable 5-year cumulative incidence of relapse of 36.4 (15.4) and 35.2 (5.9), respectively. Patients who achieved MRD negativity at TP2 had a low relapse risk (5-yr cumulative incidence of relapse (CIR)=14.3[9.8]), whereas those who attained MRD negativity at a later date showed higher CIR, comparable to patients with positive MRD at any level. BCR/ABL1 MRD negative patients at TP1 had a relapse risk similar to those who were IG/TR MRD negative (1/8 relapses). The overall concordance between the two methods is 69%, with significantly higher positivity by BCR/ABL1. In conclusion, MRD monitoring by both methods may be functional not only for measuring response but also for guiding biological studies aimed at investigating causes for discrepancies, although from our data IG/TR MRD monitoring appears to be more reliable. Early MRD negativity is highly predictive of favorable outcome. The earlier MRD negativity is achieved, the better the prognosis.


Assuntos
Proteínas de Fusão bcr-abl/genética , Imunoglobulinas/genética , Neoplasia Residual/diagnóstico , Neoplasia Residual/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Receptores de Antígenos de Linfócitos T/genética , Biomarcadores Tumorais , Terapia Combinada , Feminino , Humanos , Mesilato de Imatinib/uso terapêutico , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/mortalidade , Prognóstico , Recidiva , Análise de Sobrevida , Resultado do Tratamento
16.
EMBO Mol Med ; 10(2): 254-275, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29242210

RESUMO

Transferring large or multiple genes into primary human stem/progenitor cells is challenged by restrictions in vector capacity, and this hurdle limits the success of gene therapy. A paradigm is Duchenne muscular dystrophy (DMD), an incurable disorder caused by mutations in the largest human gene: dystrophin. The combination of large-capacity vectors, such as human artificial chromosomes (HACs), with stem/progenitor cells may overcome this limitation. We previously reported amelioration of the dystrophic phenotype in mice transplanted with murine muscle progenitors containing a HAC with the entire dystrophin locus (DYS-HAC). However, translation of this strategy to human muscle progenitors requires extension of their proliferative potential to withstand clonal cell expansion after HAC transfer. Here, we show that reversible cell immortalisation mediated by lentivirally delivered excisable hTERT and Bmi1 transgenes extended cell proliferation, enabling transfer of a novel DYS-HAC into DMD satellite cell-derived myoblasts and perivascular cell-derived mesoangioblasts. Genetically corrected cells maintained a stable karyotype, did not undergo tumorigenic transformation and retained their migration ability. Cells remained myogenic in vitro (spontaneously or upon MyoD induction) and engrafted murine skeletal muscle upon transplantation. Finally, we combined the aforementioned functions into a next-generation HAC capable of delivering reversible immortalisation, complete genetic correction, additional dystrophin expression, inducible differentiation and controllable cell death. This work establishes a novel platform for complex gene transfer into clinically relevant human muscle progenitors for DMD gene therapy.


Assuntos
Cromossomos Artificiais Humanos , Distrofina/genética , Terapia Genética/métodos , Distrofia Muscular de Duchenne/genética , Distrofia Muscular de Duchenne/terapia , Animais , Células Cultivadas , Vetores Genéticos , Humanos , Camundongos , Modelos Animais , Mutação
17.
Gut ; 66(7): 1268-1277, 2017 07.
Artigo em Inglês | MEDLINE | ID: mdl-27618837

RESUMO

OBJECTIVE: Transcribed-ultraconserved regions (T-UCR) are long non-coding RNAs which are conserved across species and are involved in carcinogenesis. We studied T-UCRs downstream of the Wnt/ß-catenin pathway in liver cancer. DESIGN: Hypomorphic Apc mice (Apcfl/fl) and thiocetamide (TAA)-treated rats developed Wnt/ß-catenin dependent hepatocarcinoma (HCC) and cholangiocarcinoma (CCA), respectively. T-UCR expression was assessed by microarray, real-time PCR and in situ hybridisation. RESULTS: Overexpression of the T-UCR uc.158- could differentiate Wnt/ß-catenin dependent HCC from normal liver and from ß-catenin negative diethylnitrosamine (DEN)-induced HCC. uc.158- was overexpressed in human HepG2 versus Huh7 cells in line with activation of the Wnt pathway. In vitro modulation of ß-catenin altered uc.158- expression in human malignant hepatocytes. uc.158- expression was increased in CTNNB1-mutated human HCCs compared with non-mutated human HCCs, and in human HCC with nuclear localisation of ß-catenin. uc.158- was increased in TAA rat CCA and reduced after treatment with Wnt/ß-catenin inhibitors. uc.158- expression was negative in human normal liver and biliary epithelia, while it was increased in human CCA in two different cohorts. Locked nucleic acid-mediated inhibition of uc.158- reduced anchorage cell growth, 3D-spheroid formation and spheroid-based cell migration, and increased apoptosis in HepG2 and SW1 cells. miR-193b was predicted to have binding sites within the uc.158- sequence. Modulation of uc.158- changed miR-193b expression in human malignant hepatocytes. Co-transfection of uc.158- inhibitor and anti-miR-193b rescued the effect of uc.158- inhibition on cell viability. CONCLUSIONS: We showed that uc.158- is activated by the Wnt pathway in liver cancers and drives their growth. Thus, it may represent a promising target for the development of novel therapeutics.


Assuntos
Neoplasias dos Ductos Biliares/metabolismo , Carcinoma Hepatocelular/metabolismo , Colangiocarcinoma/metabolismo , Sequência Conservada/genética , Neoplasias Hepáticas/metabolismo , RNA não Traduzido/genética , Via de Sinalização Wnt , Animais , Neoplasias dos Ductos Biliares/genética , Carcinoma Hepatocelular/genética , Colangiocarcinoma/genética , Regulação Neoplásica da Expressão Gênica/genética , Hepatócitos/metabolismo , Humanos , Neoplasias Hepáticas/genética , Camundongos Knockout , MicroRNAs/metabolismo , Neoplasias Experimentais , Transfecção , beta Catenina/genética , beta Catenina/metabolismo
19.
Hematol Rep ; 6(3): 5554, 2014 Aug 26.
Artigo em Inglês | MEDLINE | ID: mdl-25317319

RESUMO

In the last two decades great improvements have been made in the treatment of childhood acute lymphoblastic leukemia, with 5-year overall survival rates currently approaching almost 90%. In comparison, results reported in adolescents and young adults (AYAs) are relatively poor. In adults, results have improved, but are still lagging behind those obtained in children. Possible reasons for this different pattern of results include an increased incidence of unfavorable and a decreased incidence of favorable cytogenetic abnormalities in AYAs compared with children. Furthermore, in AYAs less intensive treatments (especially lower cumulative doses of drugs such as asparaginase, corticosteroids and methotrexate) and longer gaps between courses of chemotherapy are planned compared to those in children. However, although favorable results obtained in AYAs receiving pediatric protocols have been consistently reported in several international collaborative trials, physicians must also be aware of the specific toxicity pattern associated with increased success in AYAs, since an excess of toxicity may compromise overall treatment schedule intensity. Cooperative efforts between pediatric and adult hematologists in designing specific protocols for AYAs are warranted.

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