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1.
Neurosurg Rev ; 47(1): 72, 2024 Jan 29.
Artículo en Inglés | MEDLINE | ID: mdl-38285230

RESUMEN

Cranioplasty (CP) after decompressive hemicraniectomy (DHC) is a common neurosurgical procedure with a high complication rate. The best material for the repair of large cranial defects is unclear. The aim of this study was to evaluate different implant materials regarding surgery related complications after CP. Type of materials include the autologous bone flap (ABF), polymethylmethacrylate (PMMA), calcium phosphate reinforced with titanium mesh (CaP-Ti), polyetheretherketone (PEEK) and hydroxyapatite (HA). A retrospective, descriptive, observational bicenter study was performed, medical data of all patients who underwent CP after DHC between January 1st, 2016 and December 31st, 2022 were analyzed. Follow-up was until December 31st, 2023. 139 consecutive patients with a median age of 54 years who received either PMMA (56/139; 40.3%), PEEK (35/139; 25.2%), CaP-Ti (21/139; 15.1%), ABF (25/139; 18.0%) or HA (2/139; 1.4%) cranial implant after DHC were included in the study. Median time from DHC to CP was 117 days and median follow-up period was 43 months. Surgical site infection was the most frequent surgery-related complication (13.7%; 19/139). PEEK implants were mostly affected (28.6%; 10/35), followed by ABF (20%; 5/25), CaP-Ti implants (9.5%; 2/21) and PMMA implants (1.7%, 1/56). Explantation was necessary for 9 PEEK implants (25.7%; 9/35), 6 ABFs (24.0%; 6/25), 3 CaP-Ti implants (14.3%; 3/21) and 4 PMMA implants (7.1%; 4/56). Besides infection, a postoperative hematoma was the most common cause. Median surgical time was 106 min, neither longer surgical time nor use of anticoagulation were significantly related to higher infection rates (p = 0.547; p = 0.152 respectively). Ventriculoperitoneal shunt implantation prior to CP was noted in 33.8% (47/139) and not significantly associated with surgical related complications. Perioperative lumbar drainage, due to bulging brain, inserted in 38 patients (27.3%; 38/139) before surgery was protective when it comes to explantation of the implant (p = 0.035). Based on our results, CP is still related to a relatively high number of infections and further complications. Implant material seems to have a high effect on postoperative infections, since surgical time, anticoagulation therapy and hydrocephalus did not show a statistically significant effect on postoperative complications in this study. PEEK implants and ABFs seem to possess higher risk of postoperative infection. More biocompatible implants such as CaP-Ti might be beneficial. Further, prospective studies are necessary to answer this question.


Asunto(s)
Benzofenonas , Polímeros , Polimetil Metacrilato , Cráneo , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Cráneo/cirugía
2.
Artículo en Inglés | MEDLINE | ID: mdl-37360558

RESUMEN

Pharmaceuticals and personal care products present potential risks to human health and the environment. In particular, wastewater treatment plants often detect emerging pollutants that disrupt biological treatment. The activated sludge process is a traditional biological method with a lower capital cost and limited operating requirements than more advanced treatment methods. In addition, the membrane bioreactor combines a membrane module and a bioreactor, widely used as an advanced method for treating pharmaceutical wastewater with good pollution performance. Indeed, the fouling of the membrane remains a major problem in this process. In addition, anaerobic membrane bioreactors can treat complex pharmaceutical waste while recovering energy and producing nutrient-rich wastewater for irrigation. Wastewater characterizations have shown that wastewater's high organic matter content facilitates the selection of low-cost, low-nutrient, low-surface-area, and effective anaerobic methods for drug degradation and reduces pollution. However, to improve the biological treatment, researchers have turned to hybrid processes in which all physical, chemical, and biological treatment methods are integrated to remove various emerging contaminants effectively. Hybrid systems can generate bioenergy, which helps reduce the operating costs of the pharmaceutical waste treatment system. To find the most effective treatment technique for our research, this work lists the different biological treatment techniques cited in the literature, such as activated sludge, membrane bioreactor, anaerobic treatment, and hybrid treatment, combining physicochemical and biological techniques.

3.
Pol J Vet Sci ; 25(3): 447-454, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-36155994

RESUMEN

In this study, we aimed to investigate the effects of vitamin E on mouse adrenal glands in immobilization stress. Twenty-eight male, 10-week-old, BALB/C mice weighing 30-45 grams were divided into four groups. Mice were placed in a cage where no movement was allowed 6 hours/day for 7 days for immobilization stress. 10 ml/kg vitamin E was administered orogastrically 1 hour before immobilization stress in the vitamin E and stress+vitamin E group. At the end of the 7th day, all the animals were subjected to elevated-plus maze (anxiety) and forced swimming (depression) tests. Left adrenal glands were dissected for routine paraffin tissue embedding protocol. Adrenal sections were stained with hematoxylin-eosin and Azan. Malonaldehyde (MDA) levels were also measured in the adrenal tissues. Anxiety level (0.023), depression level (p=0.042) and MDA values (p=0.01) were significantly increased in the stress group. Histological sections of the stress group showed cortical atrophy, medullary hypertrophy, vascular dilation and hemorrhage. Azan staining revealed a thinned capsule and corticomedullary fibrosis in the stress group. Pathologies induced by immobilization stress were mostly reversed after vitamin E administration. The results suggested that vitamin E alleviates adverse effects of immobilization stress (oxidative, behavioral and histopathologic changes) in mice.


Asunto(s)
Parafina , Vitamina E , Glándulas Suprarrenales , Animales , Eosina Amarillenta-(YS) , Hematoxilina , Masculino , Malondialdehído , Ratones , Ratones Endogámicos BALB C , Estrés Oxidativo , Vitamina E/farmacología
4.
Eur Rev Med Pharmacol Sci ; 26(10): 3686-3694, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35647850

RESUMEN

OBJECTIVE: This study aims to investigate the relationship between postoperative infection-related mortality and lymphocyte-to-C-reactive protein ratio (LCR), a newly defined parameter with the combination of inflammatory and immune parameters, in patients undergoing cardiac surgery. PATIENTS AND METHODS: Between January 2016 and November 2021, 236 patients who underwent on-pomp cardiac surgery with median sternotomy and developed postoperative infection were analyzed retrospectively. Patients were divided into six groups according to the types of postoperative infection. Preoperative, perioperative, and postoperative variables of the patient groups were compared, and factors affecting postoperative mortality were evaluated. RESULTS: The mortality rate in the patient group we included in the study was 22.9%. Mortality rates did not differ significantly between the infection groups. However, when the LCR value was evaluated between the groups, there was a statistically significant difference (p<0.001). The preoperative LCR cut-off value, which predicts postoperative infection-related mortality, was determined as 133.46 (area under the curve (AUC): 0.607, p=0.017, 48.1% sensitivity, and 47.8% specificity). In the multivariate analysis, postoperative cerebrovascular event (OR: 78.365, 95% CI: 12.367-496.547, p<0.001) and Intensive Care Unit (ICU) stay (odds ratio (OR): 1.136, 95% confidence interval (CI): 1.004-1.284, p=0.042) variables were found to be independent predictive factors of postoperative infection-related mortality in the model. There was no positive differentiation of the type of infection in predicting mortality. CONCLUSIONS: The calculated LCR value is a novel and remarkable parameter in estimating postoperative infection-related mortality in patients undergoing cardiac surgery.


Asunto(s)
Proteína C-Reactiva , Procedimientos Quirúrgicos Cardíacos , Procedimientos Quirúrgicos Cardíacos/efectos adversos , Procedimientos Quirúrgicos Cardíacos/mortalidad , Humanos , Linfocitos , Complicaciones Posoperatorias/epidemiología , Estudios Retrospectivos , Infección de la Herida Quirúrgica/epidemiología
5.
Eur Rev Med Pharmacol Sci ; 25(8): 3272-3278, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33928614

RESUMEN

OBJECTIVE: Ventricular arrhythmias were the most frequent manifestations in patients with COVID-19. Both the natural course of the disease and the treatment drugs used have effects on ventricular repolarization. The objective of this study was to evaluate the effects of repolarization parameters obtained from surface electrocardiography (ECG) on prognosis. PATIENTS AND METHODS: Participants were 205 consecutive patients hospitalized with COVID-19 diagnosis. The 12-lead surface ECG was obtained from each patient on admission. The ECG results were evaluated against the patients' clinical characteristics and outcomes by experienced cardiology specialists. RESULTS: The mean age was higher in the non-survivor group compared to the survivor group (57.4 ± 15.7 vs. 65.6 ± 16.6; p = 0.001). The demographical characteristics were similar between the survivor and non-survivor groups. Multivariate analyses demonstrated that age (OR: 1.041; p = 0.009), D-dimer (OR: 1.002; p = 0.031), high-sensitivity troponin I (hs-TnI) (OR: 1.010; p = 0.041), pneumonia on computed tomography (CT) (OR: 4.985; p < 0.001), the peak-to-end interval of the T wave (Tp-e) (OR: 3.421; p < 0.001), and Tp-e/QTc ratio (OR: 1.978; p = 0.013) were statistically significant independent predictors in terms of determining mortality. CONCLUSIONS: Prolonged Tp-e interval and increased Tp-e/QTc ratio on admission are decent predictors and linked with mortality. ECG is a practical study to evaluate prognosis and potential arrhythmias, as well as initiating suitable treatment.


Asunto(s)
Arritmias Cardíacas/fisiopatología , COVID-19/fisiopatología , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Arritmias Cardíacas/epidemiología , COVID-19/epidemiología , COVID-19/metabolismo , COVID-19/mortalidad , Electrocardiografía , Femenino , Productos de Degradación de Fibrina-Fibrinógeno/metabolismo , Humanos , Unidades de Cuidados Intensivos/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Oportunidad Relativa , Pronóstico , Respiración Artificial/estadística & datos numéricos , Estudios Retrospectivos , SARS-CoV-2 , Índice de Severidad de la Enfermedad , Tomografía Computarizada por Rayos X , Troponina I/metabolismo
6.
Neurosurg Focus ; 50(1): E16, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-33386016

RESUMEN

OBJECTIVE: Placement of a ventricular drain is one of the most common neurosurgical procedures. However, a higher rate of successful placements with this freehand procedure is desirable. The authors' objective was to develop a compact navigational augmented reality (AR)-based tool that does not require rigid patient head fixation, to support the surgeon during the operation. METHODS: Segmentation and tracking algorithms were developed. A commercially available Microsoft HoloLens AR headset in conjunction with Vuforia marker-based tracking was used to provide guidance for ventriculostomy in a custom-made 3D-printed head model. Eleven surgeons conducted a series of tests to place a total of 110 external ventricular drains under holographic guidance. The HoloLens was the sole active component; no rigid head fixation was necessary. CT was used to obtain puncture results and quantify success rates as well as precision of the suggested setup. RESULTS: In the proposed setup, the system worked reliably and performed well. The reported application showed an overall ventriculostomy success rate of 68.2%. The offset from the reference trajectory as displayed in the hologram was 5.2 ± 2.6 mm (mean ± standard deviation). A subgroup conducted a second series of punctures in which results and precision improved significantly. For most participants it was their first encounter with AR headset technology and the overall feedback was positive. CONCLUSIONS: To the authors' knowledge, this is the first report on marker-based, AR-guided ventriculostomy. The results from this first application are encouraging. The authors would expect good acceptance of this compact navigation device in a supposed clinical implementation and assume a steep learning curve in the application of this technique. To achieve this translation, further development of the marker system and implementation of the new hardware generation are planned. Further testing to address visuospatial issues is needed prior to application in humans.


Asunto(s)
Realidad Aumentada , Drenaje , Humanos , Procedimientos Neuroquirúrgicos , Ventriculostomía
7.
Dev Comp Immunol ; 106: 103614, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-31962062

RESUMEN

The emergent availability in public databases of more complete genome assemblies allows us to improve genomic data obtained by classical molecular cloning. The main goal of this study was to refine the genomic map of the dromedary TRG locus by integrating our previous genomic data with the analysis of recent genomic assemblies. We identified an additional TRGC cassette, defined as a V-J-C recombination unit, located at the 5' of the locus and made up of five TRGV genes followed by three TRGJ genes and one TRGC gene. Hence, the complete dromedary TRG locus spans about 105 Kb and consists of three in tandem TRGC cassettes delimited by AMPH and STARD3NL genes at the 5' and 3' end, respectively. An expression assay carried out on peripheral blood showed the functional competency for the dromedary TRGC5 cassette and confirmed the presence of the somatic hypermutation mechanism able to enlarge the repertoire diversity of the dromedary γδ T cells.


Asunto(s)
Camelus/inmunología , Sitios Genéticos/genética , Receptores de Antígenos de Linfocitos T gamma-delta/genética , Linfocitos T/metabolismo , Animales , Evolución Molecular , Variación Genética , Genoma , Filogenia , Recombinación Genética , Alineación de Secuencia , Ovinos , Hipermutación Somática de Inmunoglobulina
8.
J Neurosurg ; : 1-7, 2019 Jun 28.
Artículo en Inglés | MEDLINE | ID: mdl-31252391

RESUMEN

OBJECTIVE: Intraneural ganglion cysts are rare and benign mucinous lesions that affect peripheral nerves, most frequently the common peroneal nerve (CPN). The precise pathophysiological mechanisms of intraneural ganglion cyst development remain unclear. A well-established theory suggests the spread of mucinous fluid along the articular branch of the peroneal nerve as the underlying mechanism. Clinical outcome following decompression of intraneural ganglion cysts has been demonstrated to be excellent. The aim of this study was to evaluate the correlation between clinical outcome and ultrasound-detected morphological nerve features following decompression of intraneural ganglion cysts of the CPN. METHODS: Data were retrospectively analyzed from 20 patients who underwent common peroneal nerve ganglion cyst decompression surgery at the Universität Ulm/Günzburg Neurosurgery Department between October 2003 and October 2017. Postoperative clinical outcome was evaluated by assessment of the muscular strength of the anterior tibial muscle, the extensor hallucis longus muscle, and the peroneus muscle according to the Medical Research Council grading system. Hypesthesia was measured by sensation testing. In all patients, postoperative morphological assessment of the peroneal nerve was conducted between October 2016 and October 2017 using the iU22 Philips Medical ultrasound system at the last routine follow-up appointment. Finally, the correlations between morphological changes in nerve ultrasound and postoperative clinical outcomes were evaluated. RESULTS: During the postoperative ultrasound scan an intraneural hypoechogenic ring structure located at the medial side of the peroneal nerve was detected in 15 (75%) of 20 patients, 14 of whom demonstrated an improvement in motor function. A regular intraneural fasicular structure was identified in 3 patients (15%), who also reported recovery. In 1 patient, a recurrent cyst was detected, and 1 patient showed intraneural fibrosis for which recovery did not occur in the year following the procedure. Two patients (10%) developed neuropathic pain that could not be explained by nerve ultrasound findings. CONCLUSIONS: The results of this study demonstrate significant recovery from preoperative weakness after decompression of intraneural ganglion cysts of the CPN. A favorable clinical outcome was highly correlated with an intraneural hypoechogenic ring-shaped structure on the medial side of the CPN identified during a follow-up postoperative ultrasound scan. These study results indicate the potential benefit of ultrasound scanning as a prognostic tool following decompression procedures for intraneural ganglion cysts of the CPN.

9.
HNO ; 67(4): 307-318, 2019 Apr.
Artículo en Alemán | MEDLINE | ID: mdl-30790007

RESUMEN

Pituitary adenomas are among the most common primary brain tumors. These tumors can produce all hormones of the anterior pituitary and thus cause endocrine diseases. Compression of the pituitary gland, the surrounding cranial nerves, or brain structures can lead to hypopituitarism, cranial nerve deficits, or diverse neurological symptoms. Visual impairment, typically with bitemporal hemianopsia, is the most common cardinal symptom. The diagnostic workup requires broad interdisciplinary cooperation. With the exception of prolactinoma, the treatment of choice for symptomatic pituitary adenoma is transnasal transsphenoidal resection. For prolactinoma, dopamine agonistic therapy is the primary treatment. Adequate hormone replacement therapy is essential in cases of hypopituitarism. Long-term follow-up is a vital part of the treatment concept.


Asunto(s)
Adenoma , Hipopituitarismo , Neoplasias Hipofisarias , Adenoma/diagnóstico , Adenoma/terapia , Neoplasias Encefálicas , Diagnóstico Diferencial , Humanos , Sistema Hipotálamo-Hipofisario/fisiopatología , Pruebas de Función Hipofisaria , Neoplasias Hipofisarias/diagnóstico , Neoplasias Hipofisarias/terapia
10.
Folia Morphol (Warsz) ; 77(3): 471-477, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29345720

RESUMEN

BACKGROUND: Nicotine is associated with increased incidence of periodontal disease and poor response to therapy. This article aimed at identifying the expression of matrix metalloproteinases 2 (MMPs2) and vascular endothelial growth factor (VEGF) proteins on extracellular matrix, fibrous distribution and angiogenetic development in periodontitis caused by nicotine effects on periodontal membrane. MATERIALS AND METHODS: In this experimental study, rats were divided into nicotine and control groups. While the rats in the nicotine group (n = 6) were administered 2 mg/kg nicotine sulphate for 28 days, the animals in the control group (n = 6) were only administered 1.5 mL physiologic saline solution subcutaneously for 28 days. RESULTS: Histological sections were prepared and immunohistochemically stained for MMP2 and VEGF. The sections stained with Trichrome-Masson were observed under light microscope. VEGF and MMP2 immunoreactivity of periodontal gingiva and dentin was assessed by immunohistochemical staining. CONCLUSIONS: Nicotine reduces MMP production, disrupts collagen synthesis and causes periodontitis. We observed that nicotine increases periodontitis by disrupting periodontal membrane and prevents tooth to anchor in dental alveoli by disrupting epithelial structure.


Asunto(s)
Matriz Extracelular/metabolismo , Encía/metabolismo , Metaloproteinasa 2 de la Matriz/metabolismo , Nicotina/efectos adversos , Periodontitis/metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo , Animales , Matriz Extracelular/patología , Encía/patología , Masculino , Nicotina/farmacología , Periodontitis/inducido químicamente , Periodontitis/patología , Ratas , Ratas Wistar
12.
Int J Tuberc Lung Dis ; 21(8): 852-861, 2017 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-28786792

RESUMEN

Tuberculosis (TB) and depression act synergistically via social, behavioral, and biological mechanisms to magnify the burden of disease. Clinical depression is a common, under-recognized, yet treatable condition that, if comorbid with TB, is associated with increased morbidity, mortality, community TB transmission, and drug resistance. Depression may increase risk of TB reactivation, contribute to disease progression, and/or inhibit the physiological response to anti-tuberculosis treatment because of poverty, undernutrition, immunosuppression, and/or negative coping behaviors, including substance abuse. Tuberculous infection and/or disease reactivation may precipitate depression as a result of the inflammatory response and/or dysregulation of the hypothalamic-pituitary-adrenal axis. Clinical depression may also be triggered by TB-related stigma, exacerbating other underlying social vulnerabilities, and/or may be attributed to the side effects of anti-tuberculosis treatment. Depression may negatively impact health behaviors such as diet, health care seeking, medication adherence, and/or treatment completion, posing a significant challenge for global TB elimination. As several of the core symptoms of TB and depression overlap, depression often goes unrecognized in individuals with active TB, or is dismissed as a normative reaction to situational stress. We used evidence to reframe TB and depression comorbidity as the 'TB-depression syndemic', and identified critical research gaps to further elucidate the underlying mechanisms. The World Health Organization's Global End TB Strategy calls for integrated patient-centered care and prevention linked to social protection and innovative research. It will require multidisciplinary approaches that consider conditions such as TB and depression together, rather than as separate problems and diseases, to end the global TB epidemic.


Asunto(s)
Antituberculosos/uso terapéutico , Depresión/epidemiología , Tuberculosis/psicología , Antituberculosos/administración & dosificación , Antituberculosos/efectos adversos , Costo de Enfermedad , Depresión/complicaciones , Progresión de la Enfermedad , Farmacorresistencia Bacteriana , Conductas Relacionadas con la Salud , Humanos , Cumplimiento de la Medicación/psicología , Atención Dirigida al Paciente/organización & administración , Estigma Social , Tuberculosis/tratamiento farmacológico , Tuberculosis/epidemiología
13.
J Neurophysiol ; 118(2): 1141-1150, 2017 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-28592685

RESUMEN

In vivo studies of neurophysiology using the whole cell patch-clamp technique enable exquisite access to both intracellular dynamics and cytosol of cells in the living brain but are underrepresented in deep subcortical nuclei because of fouling of the sensitive electrode tip. We have developed an autonomous method to navigate electrodes around obstacles such as blood vessels after identifying them as a source of contamination during regional pipette localization (RPL) in vivo. In mice, robotic navigation prevented fouling of the electrode tip, increasing RPL success probability 3 mm below the pial surface to 82% (n = 72/88) over traditional, linear localization (25%, n = 24/95), and resulted in high-quality thalamic whole cell recordings with average access resistance (32.0 MΩ) and resting membrane potential (-62.9 mV) similar to cortical recordings in isoflurane-anesthetized mice. Whole cell yield improved from 1% (n = 1/95) to 10% (n = 9/88) when robotic navigation was used during RPL. This method opens the door to whole cell studies in deep subcortical nuclei, including multimodal cell typing and studies of long-range circuits.NEW & NOTEWORTHY This work represents an automated method for accessing subcortical neural tissue for intracellular electrophysiology in vivo. We have implemented a novel algorithm to detect obstructions during regional pipette localization and move around them while minimizing lateral displacement within brain tissue. This approach leverages computer control of pressure, manipulator position, and impedance measurements to create a closed-loop platform for pipette navigation in vivo. This technique enables whole cell patching studies to be performed throughout the living brain.


Asunto(s)
Encéfalo/fisiología , Electrofisiología/métodos , Neuronavegación/métodos , Neuronas/fisiología , Técnicas de Placa-Clamp/métodos , Algoritmos , Animales , Masculino , Ratones Endogámicos C57BL , Robótica
14.
World Neurosurg ; 102: 144-150, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28286276

RESUMEN

BACKGROUND: The routine use of intraoperative magnetic resonance imaging (iMRI) helps to achieve gross total resection in transsphenoidal pituitary surgery. We compared the added value of iMRI for extent of resection in endoscopic versus microsurgical transsphenoidal adenomectomy. METHODS: A total of 96 patients with pituitary adenoma were included. Twenty-eight consecutive patients underwent endoscopic transsphenoidal tumor resection. For comparison, we used a historic cohort of 68 consecutive patients treated microsurgically. We evaluated the additional resection after conducting iMRI using intraoperative and late postoperative volumetric tumor analysis 3 months after surgery. Demographic data, clinical symptoms, and complications as well as pituitary function were evaluated. RESULTS: We found significantly fewer additional resections after conducting iMRI in the endoscopic group (P = 0.042). The difference was even more profound in Knosp grade 0-2 adenomas (P = 0.029). There was no significant difference in Knosp grade 3-4 adenomas (P = 0.520). The endoscopic approach was associated with smaller intraoperative tumor volume (P = 0.023). No significant difference was found between both techniques in postoperative tumor volume (P = 0.228). Satisfactory results of pituitary function were significantly more often associated with an endoscopic approach in the multiple regression analysis (P = 0.007; odds ratio, 17.614; confidence interval 95%, 2.164-143.396). CONCLUSIONS: With the endoscopic approach, significantly more tumor volume reduction was achieved before conducting iMRI, decreasing the need for further resection. This finding was even more pronounced in adenomas graded Knosp 0-2. In the case of extensive and invasive adenomas with infiltration of cavernous sinus and suprasellar or parasellar extension, additional tumor resection and increase in the extent of resection was achieved with iMRI in both groups. The endoscopic approach seems to result in better endocrine outcomes, especially in Knosp grade 0-2 pituitary adenomas.


Asunto(s)
Adenoma/diagnóstico por imagen , Adenoma/cirugía , Endoscopía/métodos , Microcirugia/métodos , Neoplasias Hipofisarias/diagnóstico por imagen , Neoplasias Hipofisarias/cirugía , Hueso Esfenoides/cirugía , Adolescente , Adulto , Anciano , Niño , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Nariz/cirugía , Hueso Esfenoides/diagnóstico por imagen , Resultado del Tratamiento , Adulto Joven
15.
Nature ; 537(7620): 374-377, 2016 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-27462808

RESUMEN

White dwarfs are compact stars, similar in size to Earth but approximately 200,000 times more massive. Isolated white dwarfs emit most of their power from ultraviolet to near-infrared wavelengths, but when in close orbits with less dense stars, white dwarfs can strip material from their companions and the resulting mass transfer can generate atomic line and X-ray emission, as well as near- and mid-infrared radiation if the white dwarf is magnetic. However, even in binaries, white dwarfs are rarely detected at far-infrared or radio frequencies. Here we report the discovery of a white dwarf/cool star binary that emits from X-ray to radio wavelengths. The star, AR Scorpii (henceforth AR Sco), was classified in the early 1970s as a δ-Scuti star, a common variety of periodic variable star. Our observations reveal instead a 3.56-hour period close binary, pulsing in brightness on a period of 1.97 minutes. The pulses are so intense that AR Sco's optical flux can increase by a factor of four within 30 seconds, and they are also detectable at radio frequencies. They reflect the spin of a magnetic white dwarf, which we find to be slowing down on a 107-year timescale. The spin-down power is an order of magnitude larger than that seen in electromagnetic radiation, which, together with an absence of obvious signs of accretion, suggests that AR Sco is primarily spin-powered. Although the pulsations are driven by the white dwarf's spin, they mainly originate from the cool star. AR Sco's broadband spectrum is characteristic of synchrotron radiation, requiring relativistic electrons. These must either originate from near the white dwarf or be generated in situ at the M star through direct interaction with the white dwarf's magnetosphere.

16.
Mater Sci Eng C Mater Biol Appl ; 63: 628-36, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27040258

RESUMEN

Carboxymethyl guar gum (CMGG) synthesized from commercially available polysaccharide was formulated into nanoparticles via ionic gelation using trisodium trimetaphosphate (STMP) as cross-linking agent. Characterisation using a range of analytical techniques (FTIR, NMR, GPC, TGA and DLS) confirmed the CMGG structure and revealed the effect of the CMGG and STMP concentration on the main characteristics of the obtained nanoformulations. The average nanoparticle diameter was found to be around 208 nm, as determined by dynamic light scattering (DLS) and confirmed by scanning electron microscopy (SEM) and nanoparticle tracking analysis (NTA). Experiments using simulated gastric and intestinal fluids evidenced significant pH-dependent drug release behaviour of the nanoformulations loaded with Rhodamine B (RhB) as a model drug (loading capacity in excess of 83%), as monitored by UV-Vis. While dose-dependent cytotoxicity was observed, the nanoformulations appeared completely non-toxic at concentrations below 0.3 mg/mL. Results obtained so far suggest that carboxymethylated guar gum nanoparticles formulated with STMP warrant further investigations as polysaccharide based biocompatible drug nanocarriers.


Asunto(s)
Portadores de Fármacos/química , Galactanos/química , Mananos/química , Nanopartículas/química , Gomas de Plantas/química , Línea Celular , Supervivencia Celular/efectos de los fármacos , Reactivos de Enlaces Cruzados/química , Liberación de Fármacos , Dispersión Dinámica de Luz , Humanos , Espectroscopía de Resonancia Magnética , Microscopía Electrónica de Rastreo , Tamaño de la Partícula , Rodaminas/química , Rodaminas/metabolismo , Rodaminas/toxicidad , Espectrofotometría Ultravioleta , Espectroscopía Infrarroja por Transformada de Fourier
17.
Brain Behav Immun ; 56: 105-13, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26883521

RESUMEN

Depressive symptoms cause major impairment and may accelerate HIV progression despite the use of antiretroviral medication. The somatic symptoms criteria for HIV infection and depression partially overlap, which can make differential diagnosis challenging. Because of chronic inflammation caused by HIV infection, HIV-positive patients may develop somatic and affective-cognitive symptoms of depression. Inflammation-related depression is primarily characterized with severe somatic symptoms such as fatigue and sleep disturbance. This study sought to explore the patterns of somatic and cognitive-affective depressive symptoms that characterize HIV-positive patients. Our specific aims were (1) to identify subtypes of depressive symptoms in a sample of HIV-positive patients; and (2) to test the subtypes' difference on inflammatory and HIV disease progression biomarkers. HIV-positive men and women (N=102) with and without depressive symptoms were randomly selected from an Italian HIV clinic. Depressive symptoms (PHQ-9), viral load (VL), CD4+, Il-6, TNF-α, and monocytes were assessed. The three subtypes formed using Latent Class Analysis (LCA) identified patients with (1) severe cognitive-affective and somatic depressive symptoms; (2) severe/moderate somatic symptoms; and (3) absent or low depressive symptoms. The subtype with severe/moderate somatic symptoms was characterized with elevated levels of Il-6 and monocytes. No difference on HIV progression biomarkers was found. The subtypes of depressive symptoms might help differentiating depressive symptoms from HIV- and inflammatory-related somatic symptoms. When present, cognitive-affective and/or somatic symptoms cause significant impairment to patients' lives and thus warrant further assessment and treatment.


Asunto(s)
Depresión , Infecciones por VIH , Inflamación , Interleucina-6/sangre , Monocitos , Carga Viral , Adulto , Biomarcadores/sangre , Depresión/sangre , Depresión/clasificación , Depresión/inmunología , Depresión/fisiopatología , Femenino , Infecciones por VIH/sangre , Infecciones por VIH/inmunología , Humanos , Inflamación/sangre , Inflamación/inmunología , Masculino , Persona de Mediana Edad
18.
Int J Immunopathol Pharmacol ; 29(1): 129-36, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26680255

RESUMEN

Although allergic rhinitis is considered a raising medical problem in many countries it is often undertreated. The reasons for this phenomenon are not completely clear.The aim of this study is to evaluate factors associated with allergic rhinitis under-/no treatment.A sample of 518 allergic rhinitis patients recruited by their primary care physicians, as a part of the ARGA study, were invited to fill in a specific questionnaire regarding rhinitis symptoms, treatment, and rhinitis-related work/social disability. Chi-square test and logistic regression were performed to assess risk factors for allergic rhinitis under-/no treatment.Over one out of four patients had no treatment despite the symptoms and 13.5% were inadequately treated. Participants with asthma (OR 0.47, 95% CI 0.30-0.75) and conjunctivitis (0.44, 95% CI 0.27-0.71) were at lower risk of allergic rhinitis under-/no treatment: in asthmatics this reduction was related mainly to the concomitant asthma treatment (OR 0.19, 95% CI 0.10-0.37).Asthmatics with under-/not treated rhinitis had the highest prevalence of rhinitis-related quality of life impairment.Under-/no treatment for allergic rhinitis is still rather frequent despite the relevance of this disease. The simultaneous presence of asthma and an anti-asthmatic therapy are able to influence positively the treatment. Targeted interventions toward a better characterization and a tight follow-up of rhinitis patient without asthma are needed.


Asunto(s)
Atención Primaria de Salud , Rinitis Alérgica/tratamiento farmacológico , Femenino , Humanos , Modelos Logísticos , Masculino , Calidad de Vida , Rinitis Alérgica/etiología , Rinitis Alérgica/psicología
19.
Exp Clin Endocrinol Diabetes ; 123(4): 246-51, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-25868060

RESUMEN

OBJECTIVE: To evaluate the association between cognitive functions and metabolic status in cases with gestational diabetes mellitus (GDM). METHODS: In this study 44 patients with GDM and 45 normal pregnant were included. Depression was evaluated with Beck's depression inventory (BDI). Cognitive functions were evaluated with Montreal cognitive assessment (MOCA), paced auditory serial addition test (PASAT), spatial recall test (SRT), symbol digit modalities (SDMT), and word list generation (WLG). RESULTS: The mean gestational age, educational level and account of previous birth of the subjects in the study were not statistically different between the groups. The mean scores of BDI of the 2 groups were not statistically different. MOCA score and SDMT was significantly decreased in GDM in comparison to NP (p=0.005, p=0.04 respectively). Also, SDMT score was inversely correlated with number of pregnancies, postprandial blood glucose and HbA1c.The scores of PASAT, SRT, SPART and WLG were statistically similar between the groups. CONCLUSIONS: Our findings may be a clue for early onset of impairment in cognitive functions in cases with new onset diabetes during pregnancy.


Asunto(s)
Trastornos del Conocimiento/diagnóstico , Cognición/fisiología , Diabetes Gestacional/psicología , Adulto , Trastornos del Conocimiento/etiología , Trastornos del Conocimiento/psicología , Depresión/diagnóstico , Depresión/psicología , Femenino , Prueba de Tolerancia a la Glucosa , Humanos , Pruebas Neuropsicológicas , Embarazo , Escalas de Valoración Psiquiátrica
20.
J Behav Med ; 38(4): 620-31, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25833137

RESUMEN

Illness perceptions can influence the coping strategies used in response to HIV-related stressors, and ultimately patients' clinical status. With this work, we aimed to: (1) identify illness perception-related profiles of HIV-positive patients; (2) evaluate the association between the profiles, illness-related coping strategies, HIV-progression biomarkers (CD4+ cell counts and viral load) and antiretroviral therapy use. Data about illness perceptions, HIV-related coping strategies and HIV-progression biomarkers (CD4+ and viral load) were collected from 248 Italian HIV-positive patients. Three latent classes ("high," "moderate" and "low" influence perception) that differed on consequences, emotional representation, personal control and identity were identified. A greater perception of illness influence was associated with dysfunctional coping strategies (e.g., passive coping and alcohol use), and greater viral load was observed among patients with high and moderate influence perception. In conclusion, patients with detectable or high viral load may show a greater perception of illness influence (i.e., consequences), which is associated with dysfunctional coping strategies in response to HIV-related stressors.


Asunto(s)
Adaptación Psicológica/fisiología , Actitud Frente a la Salud , Infecciones por VIH/psicología , Adulto , Fármacos Anti-VIH/uso terapéutico , Emociones/fisiología , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Masculino , Persona de Mediana Edad
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