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BACKGROUND: The incidence of cancer diagnosed during pregnancy is increasing. Data relating to investigation and management, as well as maternal and foetal outcomes is lacking in a United Kingdom (UK) population. METHODS: In this retrospective study we report data from 119 patients diagnosed with cancer during pregnancy from 14 cancer centres in the UK across a five-year period (2016-2020). RESULTS: Median age at diagnosis was 33 years, with breast, skin and haematological the most common primary sites. The majority of cases were new diagnoses (109 patients, 91.6%). Most patients were treated with radical intent (96 patients, 80.7%), however, gastrointestinal cancers were associated with a high rate of palliative intent treatment (63.6%). Intervention was commenced during pregnancy in 68 (57.1%) patients; 44 (37%) had surgery and 31 (26.1%) received chemotherapy. Live births occurred in 98 (81.7%) of the cases, with 54 (55.1%) of these delivered by caesarean section. Maternal mortality during the study period was 20.2%. CONCLUSIONS: This is the first pan-tumour report of diagnosis, management and outcomes of cancer diagnosed during pregnancy in the UK. Our findings demonstrate proof of concept that data collection is feasible and highlight the need for further research in this cohort of patients.
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Cesárea , Neoplasias , Embarazo , Humanos , Femenino , Estudios Retrospectivos , Neoplasias/diagnóstico , Neoplasias/epidemiología , Neoplasias/terapia , Reino Unido/epidemiología , Nacimiento VivoRESUMEN
Osteoporosis, a common chronic metabolic bone disease is associated with considerable morbidity and mortality. As the prevalence of osteoporosis increases with age, a paralleled elevation in the rate of incident fragility fractures will be observed. This narrative review explores the origins of bone and considers physiological mechanisms involved in bone homeostasis relevant to management and treatment. Secondary causes of osteoporosis, as well as osteosarcopenia are discussed followed by an overview of the commonly used pharmacological treatments for osteoporosis in older people.
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Enfermedades Óseas Metabólicas , Fracturas Óseas , Osteoporosis , Sarcopenia , Anciano , Anciano de 80 o más Años , Humanos , Osteoporosis/tratamiento farmacológico , PrevalenciaRESUMEN
AIMS: To revisit the data analysis used to inform National Institute of Health and Care Excellence (NICE) NG17 guidance for initiating basal insulin in adults with type 1 diabetes mellitus (diabetes). METHODS: We replicated the data, methodology and analysis used by NICE diabetes in the NG17 network meta-analysis (NMA). We expanded this data cohort to a more contemporary data set (extended 2017 NMA) and restricted the studies included to improve the robustness of the data set (restricted 2017 NMA) and in a post hoc analysis, changed the index comparator from neutral protamine Hagedorn (NPH) insulin twice daily to insulin detemir twice daily. RESULTS: The absolute changes in HbA1c were similar to those reported in the NG17. However, all 95% credible intervals for change in HbA1c point estimates crossed the line of null effect, except for detemir twice daily (in the NICE and extended 2017 NMAs) and NPH four times daily. In the detemir twice-daily centred post hoc analysis, the 95% credible intervals for change in HbA1c crossed the line of null effect for all basal therapies, except NPH. CONCLUSIONS: In NG17, comparisons of basal insulins were based solely on efficacy of glycaemic control. Many of the trials used in this analysis were treat-to-target, which minimize differences in HbA1c . In the NMAs, statistical significance was severely undermined by the wide credible intervals. Despite these limitations, point estimates of HbA1c were used to rank the insulins and formed the basis of NG17 guidance. This study queries whether such analyses should be used to make specific clinical recommendations.
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Diabetes Mellitus Tipo 1/tratamiento farmacológico , Hemoglobina Glucada/metabolismo , Hipoglucemiantes/uso terapéutico , Insulina/uso terapéutico , Diabetes Mellitus Tipo 1/metabolismo , Humanos , Hipoglucemia/inducido químicamente , Insulina Detemir/uso terapéutico , Insulina Glargina/uso terapéutico , Insulina Isófana/uso terapéutico , Insulina de Acción Prolongada/uso terapéutico , Metaanálisis en Red , Guías de Práctica Clínica como AsuntoRESUMEN
AIM: To conduct an open-label study to provide UK real-world evidence regarding the use of insulin glargine 300 units/ml (U300) in people with Type 1 diabetes mellitus. METHODS: People with Type 1 diabetes who had been prescribed U300 ≥6 months before data collection and had HbA1c levels recorded within 3 months prior to U300 (baseline) were included. The primary endpoint was change in HbA1c from baseline to month 6 after U300 initiation. Other endpoints included number of documented hypoglycaemic and diabetic ketoacidosis episodes, and change in daily basal insulin dose. RESULTS: A total of 298 people with Type 1 diabetes were included [mean age 42.1 years, mean HbA1c 79 mmol/mol (9.4%)]. After U300 initiation, the mean reduction in HbA1c from baseline to month 6 was -4 mmol/mol (-0.4%; P<0.001; n=188). The total daily basal insulin dose at 6 months was 1.3 units higher than at the time of U300 initiation (P<0.001; n=275) but was not significantly different from the prior basal insulin dose. There was no clinically significant difference in weight between baseline and month 6 [mean difference +0.7 kg, 95% CI -0.1, 1.5; P=0.084; n=115). During the 6 months before and after U300 initiation, severe hypoglycaemic episodes were documented for 6/298 and 4/298 participants. Diabetic ketoacidosis episodes requiring Accident and Emergency department visits or hospitalization were documented for 4/298 and 6/298 participants, before and after U300 initiation, respectively. CONCLUSIONS: In people with Type 1 diabetes, a change in basal insulin to U300 was associated with clinically and statistically significant HbA1c improvements, without significant changes in basal insulin dose and weight. Documented severe hypoglycaemia episodes and diabetic ketoacidosis requiring Accident and Emergency department visits or hospitalization were low and similar before and after U300 initiation.
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Glucemia/efectos de los fármacos , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Cetoacidosis Diabética/prevención & control , Insulina Glargina/administración & dosificación , Insulina Glargina/uso terapéutico , Adulto , Diabetes Mellitus Tipo 1/epidemiología , Diabetes Mellitus Tipo 1/fisiopatología , Cetoacidosis Diabética/epidemiología , Relación Dosis-Respuesta a Droga , Femenino , Hemoglobina Glucada/metabolismo , Humanos , Hipoglucemiantes/administración & dosificación , Hipoglucemiantes/uso terapéutico , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del Tratamiento , Reino Unido/epidemiologíaRESUMEN
Ageing populations have greater incidences of dementia. People with dementia present for emergency and, increasingly, elective surgery, but are poorly served by the lack of available guidance on their peri-operative management, particularly relating to pharmacological, medico-legal, environmental and attitudinal considerations. These guidelines seek to deliver such guidance, by providing information for peri-operative care providers about dementia pathophysiology, specific difficulties anaesthetising patients with dementia, medication interactions, organisational and medico-legal factors, pre-, intra- and postoperative care considerations, training, sources of further information and care quality improvement tools.
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Anestesistas , Demencia/terapia , Atención Perioperativa , Guías de Práctica Clínica como Asunto , Anestesia/efectos adversos , Anestesia/métodos , Demencia/diagnóstico , Demencia/etiología , Electroencefalografía , Humanos , Sociedades MédicasRESUMEN
Gastric metastases are a rare occurrence in patients with malignancy. In case reports of these arising from germ cell tumours, the majority were non-seminomatous germ cell tumours and had evidence of retroperitoneal involvement. We present a unique case of a 67-year-old man with metastatic testicular pure seminoma. He presented with dyspepsia and investigation found isolated metastases to the gastric mucosa and sub-mucosa from a right testicular primary. No lymph node involvement was identified. The patient was managed with curative intent with total gastrectomy and inguinal orchidectomy. To date, there is no evidence of disease recurrence.
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Seminoma/patología , Neoplasias Gástricas/secundario , Neoplasias Testiculares/patología , Anciano , Gastrectomía , Humanos , Masculino , Orquiectomía , Seminoma/cirugía , Neoplasias Gástricas/cirugía , Neoplasias Testiculares/cirugíaRESUMEN
AIM: To evaluate the impact of severe hypoglycaemia on NHS resources and overall glycaemic control in adults with Type 1 diabetes. METHODS: An observational, retrospective study of adults (aged ≥ 18 years) with Type 1 diabetes reporting one or more episodes of severe hypoglycaemia during the preceding 24 months in 10 NHS hospital diabetes centres in England and Wales. The primary outcome was healthcare resource utilization associated with severe hypoglycaemia. Secondary outcomes included demographic and clinical characteristics, diabetes control and pathway of care. RESULTS: Some 140 episodes of severe hypoglycaemia were reported by 85 people during the 2-year observation period. Ambulances were called in 99 of 140 (71%) episodes and Accident and Emergency attendance occurred in 26 of 140 (19%) episodes, whereas 29 of 140 (21%) episode required no immediate help from healthcare providers. Participants attended a median of 5 (range 0-58) diabetes clinic consultations during the observation period; 13% (70 of 552) of all consultations were severe hypoglycaemia-related. Of the HbA1c measurements recorded closest prior to severe hypoglycaemia (n = 119), only 7 of 119 measurements were < 48 mmol/mol (< 6.5%) and mean HbA1c was 70 (sd 19) mmol/mol (8.5%, sd 1.7%). Some 119 changes to diabetes treatment were recorded during the observation period (median/person 0;, range 0-11), of which 52 of 119 changes (44%) followed severe hypoglycaemic events. CONCLUSIONS: We observed a high level of ambulance service intervention but surprisingly low levels of hypoglycaemia follow-up, therapy change and specialist intervention in people self-reporting severe hypoglycaemia. These results suggest there may be important gaps in care pathways for people with Type 1 diabetes self-reporting severe hypoglycaemia.
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BACKGROUND: Socio-emotional development is the expression and management of emotions, which in non-human primates can be examined using responses toward increasing levels of threat. Damage to the limbic system alters socio-emotional development in primates. Thus, neuronal and glial cell loss caused by exposure to general anaesthesia early in infancy might also impact socio-emotional development. We recently reported that repeated sevoflurane exposure in the first month of life alters emotional behaviours at 6 months of age and impairs visual recognition memory after the first year of life in rhesus monkeys. The present study evaluated socio-emotional behaviour at 1 and 2 yr of age in those same monkeys to determine the persistence of altered emotional behaviour. METHODS: Rhesus monkeys of both sexes were exposed to sevoflurane anaesthesia three times for 4 h each time in the first 6 weeks of life. At 1 and 2 yr of age, they were tested on the human intruder task, a well-established mild acute social stressor. RESULTS: Monkeys exposed to sevoflurane as infants exhibited normal fear and hostile responses, but exaggerated self-directed (displacement) behaviours, a general indicator of stress and anxiety in non-human primates. CONCLUSIONS: Early repeated sevoflurane exposure in infant non-human primates results in an anxious phenotype that was first detected at 6 months, and persists for at least 2 yr of age. This is the first demonstration of such a prolonged impact of early anaesthesia exposure on emotional reactivity.
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Anestésicos por Inhalación/efectos adversos , Conducta Animal/efectos de los fármacos , Sevoflurano/efectos adversos , Conducta Social , Estrés Psicológico , Animales , Modelos Animales de Enfermedad , Macaca mulattaRESUMEN
Background: The prevalence of MDR Neisseria gonorrhoeae is increasing globally and represents a public health emergency. Development and approval of new anti-gonococcal agents may take years. As a concurrent approach to developing new antimicrobials, the laboratory and clinical evaluation of currently licensed antimicrobials not widely used for the treatment of gonorrhoea may provide new options for the treatment of gonococcal infections. Objectives: To determine the in vitro activity of nine alternative, currently licensed and late-development antimicrobials with the potential to treat gonococcal infections against 112 clinical isolates of N. gonorrhoeae resistant to one or multiple antimicrobials. Methods: The MICs of conventional anti-gonococcal antimicrobials (penicillin, ceftriaxone, cefixime, azithromycin, ciprofloxacin, tetracycline and spectinomycin) and alternative antimicrobials (ertapenem, gentamicin, netilmicin, tigecycline, eravacycline, fosfomycin, linezolid, ceftazidime/avibactam and ceftaroline) were determined by agar dilution. Results: Ertapenem and the novel cephalosporins demonstrated similar MIC values to the third-generation cephalosporins, but increased MICs were observed for isolates with increased cefixime and ceftriaxone MICs. Tigecycline and eravacycline had MIC values below expected serum concentrations for all isolates tested. The aminoglycosides gentamicin and netilmicin were generally more potent than spectinomycin, with netilmicin demonstrating the greatest potency. Fosfomycin MICs were elevated compared with other agents, but remained within the MIC range for susceptible organisms, while linezolid MICs were generally higher than those for organisms considered resistant. Conclusions: Among potentially therapeutically useful alternative agents, the aminoglycosides, eravacycline, tigecycline and fosfomycin had good in vitro activity. The novel cephalosporins and ertapenem had comparable activity to cefixime and ceftriaxone.
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Antiinfecciosos/farmacología , Gonorrea/microbiología , Neisseria gonorrhoeae/efectos de los fármacos , Humanos , Pruebas de Sensibilidad Microbiana , Neisseria gonorrhoeae/aislamiento & purificaciónRESUMEN
BACKGROUND: Experimental studies in animals have shown that exposure to general anaesthesia in infancy can cause loss of cells in the central nervous system and long-term impairments in neurocognitive function. Some human epidemiological studies have shown increased risk of learning disability after repeated anaesthesia exposure in early childhood. Thus, we investigated in a highly translational rhesus monkey model, whether repeated exposure in infancy to the inhalation anaesthetic sevoflurane is associated with impaired visual recognition memory during the first two yr of life. METHODS: Rhesus monkeys of both sexes were exposed to sevoflurane inhalation anaesthesia on approximately postnatal day 7 and then again 14 and 28 days later, for four h each time. Visual recognition memory was tested using the visual paired comparison task, which measures memory by assessing preference for looking at a new image over a previously-viewed image. Monkeys were tested at 6-10 months of age, again at 12-18 months of age, and again at 24-30 months of age. RESULTS: No memory impairment was detected at 6-10 months old, but significant impairment (reduced time looking at the novel image) was observed at 12-18 and 24-30 months old. CONCLUSIONS: Repeated exposure of infant rhesus monkeys to sevoflurane results in visual recognition memory impairment that emerges after the first yr of life. This is consistent with epidemiological studies that show increased risk of learning disability after repeated exposure to anaesthesia in infancy/early childhood. Moreover, these deficits may emerge at later developmental stages, even when memory performance is unaffected earlier in development.
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Anestésicos por Inhalación/efectos adversos , Trastornos de la Memoria/inducido químicamente , Memoria/efectos de los fármacos , Reconocimiento en Psicología/efectos de los fármacos , Sevoflurano/efectos adversos , Percepción Visual/efectos de los fármacos , Animales , Animales Recién Nacidos , Modelos Animales de Enfermedad , Femenino , Macaca mulatta , MasculinoRESUMEN
AIM: To estimate potential cost avoidance through modest and achievable improvements in glycaemic control in adults with Type 1 or Type 2 diabetes mellitus in the UK healthcare system. METHODS: The IMS Core Diabetes Model was used to examine the impact of improved glycaemic control (indicated by reduction in HbA1c level), in a representative cohort of adults with Type 1 or Type 2 diabetes. The cumulative incidence of microvascular and macrovascular complications was modelled across 5-year periods to a 25-year time horizon. Complication costs were applied to the data to estimate potential accrued cost avoidance. RESULTS: Significant cost avoidance of ~£340 m is apparent in the first 5 years, increasing to ~£5.5bn after 25 years of sustained improvement in control. The overwhelming majority of cost avoidance arises from reductions in microvascular complications. In people with Type 1 diabetes the greatest cost avoidance comes from a reduction in renal disease (74% of cost avoidance), while in people with Type 2 diabetes it is generated by a reduction in foot ulcers, amputations and neuropathy: 57% cost avoidance). Greater cost reduction is accrued more rapidly in people with higher starting HbA1c levels. CONCLUSION: Modest improvements in glycaemic control generate significant reductions in the incidence and, therefore, cost of microvascular complications in people with Type 1 or Type 2 diabetes. This study provides clear support for the premise that prioritized and sustained investment in early and better intervention can provide concrete financial benefits in both the short and longer term.
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Glucemia/metabolismo , Complicaciones de la Diabetes/economía , Diabetes Mellitus Tipo 1/complicaciones , Diabetes Mellitus Tipo 1/economía , Diabetes Mellitus Tipo 1/terapia , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/economía , Diabetes Mellitus Tipo 2/terapia , Costos de la Atención en Salud , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Cohortes , Complicaciones de la Diabetes/sangre , Complicaciones de la Diabetes/epidemiología , Diabetes Mellitus Tipo 1/epidemiología , Diabetes Mellitus Tipo 2/epidemiología , Femenino , Estudios de Seguimiento , Hemoglobina Glucada/metabolismo , Humanos , Masculino , Persona de Mediana Edad , Reino Unido/epidemiologíaRESUMEN
Salmonellae initiate disease through the invasion of host cells within the intestine. This ability to invade requires the coordinated action of numerous genes, many of which are found within Salmonella pathogenicity island 1 (SPI-1). The key to this process is the ability of the bacteria to respond to the environment, thereby upregulating the necessary genes under optimal conditions. Central to the control of SPI-1 is the transcriptional activator hilA. Work has identified at least 10 different activators and 8 different repressors responsible for the control of hilA. We have previously shown that hilE is a Salmonella-specific negative regulator that is able to repress hilA expression and invasion. Additionally, fimZ, a transcriptional activator responsible for the expression of type I fimbriae as well as flagellar genes, has also been implicated in this process. fimZ is homologous to response regulators from other two-component regulatory systems, although a sensor for the system has not been identified. The phoPQ and phoBR regulons are both two-component systems that negatively affect hilA expression, although the mechanism of action has not been determined. Our results show that PhoBR is capable of inducing fimZ expression, whereas PhoPQ does not affect fimZ expression but does upregulate hilE in an FimZ-dependent manner. Therefore, phosphate (sensed by PhoBR) and magnesium (sensed by PhoPQ) levels are important in controlling hilA expression levels when Salmonella is in the intestinal environment.
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Proteínas Bacterianas/genética , Fimbrias Bacterianas/genética , Regulación Bacteriana de la Expresión Génica , Regulón , Proteínas Represoras/genética , Salmonella typhimurium/genética , Transactivadores/genética , Proteínas Bacterianas/metabolismo , Fimbrias Bacterianas/metabolismo , Islas Genómicas , Magnesio/metabolismo , Fosfatos/metabolismo , Regiones Promotoras Genéticas , Proteínas Represoras/metabolismo , Salmonella typhimurium/metabolismo , Salmonella typhimurium/patogenicidad , Transactivadores/metabolismo , Transcripción GenéticaRESUMEN
Of 1,927 Enterococcus species isolates collected across Canada from 2007 to 2013, 80 (4.2%) were identified as vancomycin-resistant enterococci (VRE). VRE infections during this time tripled in Canadian hospitals, from 1.8% to 6.0% (P = 0.03). All VRE were Enterococcus faecium, with 90% possessing vanA. The prevalence of vanB decreased from 37.5% in 2007 to 0% in 2013 (P < 0.05). The VRE were multidrug resistant, but 70.6%, 86.3%, and 100% were susceptible to doxycycline, linezolid, and daptomycin, respectively.
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Enterococcus/efectos de los fármacos , Infecciones por Bacterias Grampositivas/epidemiología , Infecciones por Bacterias Grampositivas/microbiología , Resistencia a la Vancomicina , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Antibacterianos/farmacología , Proteínas Bacterianas/genética , Canadá/epidemiología , Ligasas de Carbono-Oxígeno/genética , Niño , Preescolar , Farmacorresistencia Bacteriana Múltiple/genética , Enterococcus faecium/efectos de los fármacos , Femenino , Hospitales , Humanos , Lactante , Recién Nacido , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Prevalencia , Vigilancia en Salud Pública , Vancomicina/farmacología , Adulto JovenRESUMEN
Plazomicin is a next-generation aminoglycoside that is not affected by most clinically relevant aminoglycoside-modifying enzymes. The in vitro activities of plazomicin and comparator antimicrobials were evaluated against a collection of 5,015 bacterial isolates obtained from patients in Canadian hospitals between January 2011 and October 2012. Susceptibility testing was performed using the Clinical and Laboratory Standards Institute (CLSI) broth microdilution method, with MICs interpreted according to CLSI breakpoints, when available. Plazomicin demonstrated potent in vitro activity against members of the family Enterobacteriaceae, with all species except Proteus mirabilis having an MIC90 of ≤1 µg/ml. Plazomicin was active against aminoglycoside-nonsusceptible Escherichia coli, with MIC50 and MIC90 values identical to those for aminoglycoside-susceptible isolates. Furthermore, plazomicin demonstrated equivalent activities versus extended-spectrum ß-lactamase (ESBL)-producing and non-ESBL-producing E. coli and Klebsiella pneumoniae, with 90% of the isolates inhibited by an MIC of ≤1 µg/ml. The MIC50 and MIC90 values for plazomicin against Pseudomonas aeruginosa were 4 µg/ml and 16 µg/ml, respectively, compared with 4 µg/ml and 8 µg/ml, respectively, for amikacin. Plazomicin had an MIC50 of 8 µg/ml and an MIC90 of 32 µg/ml versus 64 multidrug-resistant P. aeruginosa isolates. Plazomicin was active against methicillin-susceptible and methicillin-resistant Staphylococcus aureus, with both having MIC50 and MIC90 values of 0.5 µg/ml and 1 µg/ml, respectively. In summary, plazomicin demonstrated potent in vitro activity against a diverse collection of Gram-negative bacilli and Gram-positive cocci obtained over a large geographic area. These data support further evaluation of plazomicin in the clinical setting.
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Antibacterianos/farmacología , Bacterias Gramnegativas/efectos de los fármacos , Bacterias Grampositivas/efectos de los fármacos , Sisomicina/análogos & derivados , Enterobacteriaceae/efectos de los fármacos , Humanos , Klebsiella pneumoniae/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Pseudomonas aeruginosa/efectos de los fármacos , Sisomicina/farmacología , Staphylococcus aureus/efectos de los fármacosRESUMEN
The International Commission on Radiological Protection (ICRP) have suggested the identification of a series of terrestrial, marine and freshwater sites from which samples of each Reference animal and plant (RAP) could be systematically collected and analysed. We describe the first such study in which six of the eight terrestrial RAPs, and associated soil samples, were collected from a site located in a managed coniferous forestry plantation in north-west England. Adult life stages of species representing six of the terrestrial RAPs (Wild grass, Pine tree, Deer, Rat, Earthworm and Bee) were sampled and analysed to determine concentrations of 60 elements and gamma-emitting radionuclides. The resultant data have been used to derive concentration ratios (CR(wo-soil)) relating element/radionuclide concentrations in the RAPs to those in soil. This paper presents the first-reported transfer parameters for a number of the RAP-element combinations. Where possible, the derived CR(wo-soil) values are compared with the ICRPs-recommended values and any appreciable differences discussed.
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Bosques , Agencias Internacionales , Plantas/química , Monitoreo de Radiación , Protección Radiológica/normas , Animales , Rayos gamma , Concentración de Iones de Hidrógeno , Radioisótopos/análisis , Estándares de Referencia , Suelo/químicaRESUMEN
Photoperiod is essential in manipulating sexual maturity and reproductive performance in avian species. Light can be perceived by photoreceptors in the retina of the eye, pineal gland, and hypothalamus. However, the relative sensitivity and specificity of each organ to wavelength, and consequently the physiological effects, may differ. The purpose of this experiment was to test the impacts of light wavelengths on reproduction, growth, and stress in laying hens maintained in cages and to determine whether the retina of the eye is necessary. Individual cages in 3 optically isolated sections of a single room were equipped with LED strips providing either pure green, pure red or white light (red, green, and blue) set to 10 lx (hens levels). The involvement of the retina on mediating the effects of light wavelength was assessed by using a naturally blind line (Smoky Joe) of chickens. Red and white lights resulted in higher estradiol concentrations after photostimulation, indicating stronger ovarian activation, which translated into a significantly lower age at first egg when compared with the green light. Similarly, hens maintained under red and white lights had a longer and higher peak production and higher cumulative egg number than hens under green light. No significant difference in BW gain was observed until sexual maturation. However, from 23 wk of age onward, birds exposed to green light showed higher body growth, which may be the result of their lower egg production. Although corticosterone levels were higher at 20 wk of age in hens under red light, concentrations were below levels that can be considered indicative of stress. Because no significant differences were observed between blind and sighted birds maintained under red and white light, the retina of the eye did not participate in the activation of reproduction. In summary, red light was required to stimulate the reproductive axis whereas green light was ineffective, and the effects of stimulatory wavelengths do not appear to require a functional retina of the eye.
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Crianza de Animales Domésticos/métodos , Pollos/fisiología , Luz , Reproducción/efectos de la radiación , Retina/efectos de la radiación , Animales , Color , Femenino , Iluminación , Fotoperiodo , Células Fotorreceptoras/efectos de la radiación , Retina/anatomía & histología , Maduración SexualRESUMEN
Pseudomonas aeruginosa clinical isolates demonstrating difficult-to-treat resistance (DTR) and multidrug-resistant (MDR) phenotypes were evaluated by broth microdilution. Susceptibility was lower for all antimicrobials versus DTR relative to MDR isolates. Ceftazidime-avibactam, ceftolozane-tazobactam, and imipenem-relebactam susceptibility was 35.9%, 64.5%, and 47.0% for DTR isolates and 60.5%, 80.6%, and 71.5% for MDR isolates.
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Antiinfecciosos , Infecciones por Pseudomonas , Humanos , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Pseudomonas aeruginosa , Farmacorresistencia Bacteriana , Ceftazidima/farmacología , Ceftazidima/uso terapéutico , Cefalosporinas/farmacología , Cefalosporinas/uso terapéutico , Infecciones por Pseudomonas/tratamiento farmacológico , Antiinfecciosos/farmacología , Compuestos de Azabiciclo/farmacología , Compuestos de Azabiciclo/uso terapéutico , Combinación de Medicamentos , Pruebas de Sensibilidad Microbiana , Farmacorresistencia Bacteriana MúltipleRESUMEN
AIMS: WHO Grade 3 (G3) meningiomas are rare tumours with limited data to guide management. This retrospective study documents UK management approaches across 14 centres over 11 years. MATERIALS AND METHODS: Patients with WHO G3 meningioma between 01/01/2008 and 31/12/2018 were identified. Data were collected on demographics, management strategy, adjuvant radiotherapy, approach in recurrence setting and survival. RESULTS: 84 patients were identified. 21.4% transformed from lower-grade disease. 96.4% underwent primary surgical resection, with 20.8% having evidence of residual disease on their post-op MRI. 59.3% of patients underwent adjuvant radiotherapy (RT) following surgical resection. Overall median PFS and OS were 12.6 months and 28.2 months, respectively. Median OS in the group who underwent complete surgical resection was 34.9 months, compared to 27.5 months for those who had incomplete resection (HR 0.58, 95% CI 0.27-1.23, p = 0.15). Median OS was 33.1 months for those who underwent adjuvant RT and 14.0 months for those who did not (HR 0.48, 95% CI 0.27-0.84, p = 0.004). Median adjuvant RT dose delivered was 60Gy (range 12Gy-60Gy), 45.8% of adjuvant RT was delivered using IMRT. At disease relapse, 31% underwent salvage surgery and 29.3% underwent salvage RT. Of those treated with salvage RT, 64.7% were re-treats and all were treated with hypofractionated RT. CONCLUSION: Surgery continues to be the preferred primary management strategy. Post-operative MRI within 48 hours is indicated to assess presence of residual disease and guide further surgical options. Adjuvant radiotherapy plays an important part of the management paradigm in these patients with the data supporting an attached survival advantage. Further surgery and re-irradiation is an option in the disease recurrence setting with radiosurgery frequently utilised in this context.
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Neoplasias Meníngeas , Meningioma , Humanos , Estudios Retrospectivos , Masculino , Femenino , Meningioma/radioterapia , Meningioma/patología , Meningioma/mortalidad , Meningioma/terapia , Meningioma/cirugía , Persona de Mediana Edad , Reino Unido , Anciano , Neoplasias Meníngeas/radioterapia , Neoplasias Meníngeas/patología , Neoplasias Meníngeas/terapia , Neoplasias Meníngeas/cirugía , Radioterapia Adyuvante , Adulto , Clasificación del Tumor , Anciano de 80 o más Años , Recurrencia Local de Neoplasia/radioterapiaRESUMEN
BACKGROUND: An improved understanding of which gastroesophageal adenocarcinoma (GOA) patients respond to both chemotherapy and immune checkpoint inhibitors (ICI) is needed. We investigated the predictive role and underlying biology of a 44-gene DNA damage immune response (DDIR) signature in patients with advanced GOA. MATERIALS AND METHODS: Transcriptional profiling was carried out on pretreatment tissue from 252 GOA patients treated with platinum-based chemotherapy (three dose levels) within the randomized phase III GO2 trial. Cross-validation was carried out in two independent GOA cohorts with transcriptional profiling, immune cell immunohistochemistry and epidermal growth factor receptor (EGFR) fluorescent in situ hybridization (FISH) (n = 430). RESULTS: In the GO2 trial, DDIR-positive tumours had a greater radiological response (51.7% versus 28.5%, P = 0.022) and improved overall survival in a dose-dependent manner (P = 0.028). DDIR positivity was associated with a pretreatment inflamed tumour microenvironment (TME) and increased expression of biomarkers associated with ICI response such as CD274 (programmed death-ligand 1, PD-L1) and a microsatellite instability RNA signature. Consensus pathway analysis identified EGFR as a potential key determinant of the DDIR signature. EGFR amplification was associated with DDIR negativity and an immune cold TME. CONCLUSIONS: Our results indicate the importance of the GOA TME in chemotherapy response, its relationship to DNA damage repair and EGFR as a targetable driver of an immune cold TME. Chemotherapy-sensitive inflamed GOAs could benefit from ICI delivered in combination with standard chemotherapy. Combining EGFR inhibitors and ICIs warrants further investigation in patients with EGFR-amplified tumours.