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BACKGROUND: Governing organisations for health services currently recommend a patient-centred (PC) approach to practice for all health professions, including dietetics. For the vulnerable older malnourished patient, this approach needs to be prioritised to improve outcomes. The paucity of patient experience data likely limits evidence-based, patient-centred care (PCC) from being implemented effectively. The present study aimed to identify quality indicators of dietetic services from the perspectives of older malnourished patients to inform evidence-based PC dietetic care. METHODS: Surveys were completed by a sample of 28 females and 28 males (mean age 81 years) who had been seen by a dietitian for malnutrition assessment. In-depth, face-to-face, semi-structured interviews were undertaken with a sub-sample of four females and six males (mean age 81 years). Interviews were transcribed verbatim. Thematic analysis of transcripts and open-ended survey responses was conducted to determine patient-identified quality indicators. RESULTS: Three structure indicators (continuity of care through regular contact and post-discharge dietetic follow-up; interdisciplinary coordination and collaboration; and high-quality hospital food services), five process indicators (addressing a patient's primary medical concern; involving the patient's family; providing clear and simple dietetic information; providing expert dietary knowledge; utilising interpersonal communication skills) and three outcome indicators (improvement in health status; improvement or maintenance of independence; weight gain) were identified. The experiences of older malnourished patients with dietetic services, as described in the present study, reinforce the importance of ensuring high-quality and tailored dietetic care as a key element of PC dietetic services. CONCLUSIONS: The quality indicators of dietetic services identified in the present study may facilitate dietitians to provide evidence-based PCC for older malnourished patients.
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Dietética , Desnutrición/dietoterapia , Atención Dirigida al Paciente , Anciano , Anciano de 80 o más Años , Dieta , Femenino , Servicio de Alimentación en Hospital , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Nutricionistas , Encuestas y CuestionariosRESUMEN
There is a growing interest for cost-effective and nondestructive analytical techniques in both research and application fields. The growing approach by near-infrared spectroscopy (NIRs) pushes to develop handheld devices devoted to be easily applied for in situ determinations. Consequently, portable NIR spectrometers actually result definitively recognized as powerful instruments, able to perform nondestructive, online, or in situ analyses, and useful tools characterized by increasingly smaller size, lower cost, higher robustness, easy-to-use by operator, portable and with ergonomic profile. Chemometrics play a fundamental role to obtain useful and meaningful results from NIR spectra. In this review, portable NIRs applications, published in the period 2019-2022, have been selected to indicate starting references. These publications have been chosen among the many examples of the most recent applications to demonstrate the potential of this analytical approach which, not having the need for extraction processes or any other pre-treatment of the sample under examination, can be considered the "true green analytical chemistry" which allows the analysis where the sample to be characterized is located. In the case of industrial processes or plant or animal samples, it is even possible to follow the variation or evolution of fundamental parameters over time. Publications of specific applications in this field continuously appear in the literature, often in unfamiliar journal or in dedicated special issues. This review aims to give starting references, sometimes not easy to be found.
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OBJECTIVE: The aim of this study was to characterize the role of attachment in adoption, first by assessing the influence of adoptive parents on their late-adopted children and second by investigating the role of children's attachment on an emotional understanding task. DESIGN: On children's arrival into adoptive families, parents' attachment was evaluated. After 12-18 months, children's attachment towards mothers and fathers was assessed. Twelve months later, children participated in an emotional understanding task. METHOD: Parents' attachment was assessed using the Adult Attachment Interview. Children's attachment and emotional understanding were evaluated respectively using the Manchester Child Attachment Story Task and the Test of Emotion Comprehension. RESULTS: A correspondence of 80% (security vs. insecurity) and 60% (security vs. avoidant or ambivalent insecurity K= 0.40) between mothers' and children's pattern of attachment was found. A secure state of mind in both adoptive parents was a protective factor towards children's attachment disorganization. Finally, there was a significant association between children's security of attachment and their performance on the emotional understanding task. CONCLUSION: Adoption appears to be an intervention that assures the adoptive child an opportunity to catch up on emotional development and to partially resolve prior traumatic attachment experiences; adoptive parents play a central role in the emotional adjustment of their children.
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Adopción/psicología , Comprensión , Emociones , Apego a Objetos , Padres/psicología , Adulto , Preescolar , Femenino , Humanos , Masculino , Relaciones Padres-HijoRESUMEN
OBJECTIVE: Implantation or replacement of a cardiovascular implantable electronic device (CIED) may be associated with complications, such as pocket hematomas and infections. This study aims to determine whether a lyophilized gentamycin-containing collagen implant (GCCI) reduces major CIED infections and pocket hematomas after implant. SUBJECTS AND METHODS: A retrospective study was conducted among patients who underwent implantation or replacement of CIED at the Tor Vergata Polyclinic (Rome, Italy) between June 2007 and November 2019. The primary combined endpoint was infection and hematoma occurrence through 12 months of follow-up post-procedure. The rate of single infectious complications, pocket hematomas or both were also assessed. RESULTS: We compared 475 patients treated with the GCCI (GCCI group) with 714 patients who did not receive it (control group). Complications occurred in 127 patients (11%); a statistically significant reduction of infections and pocket hematomas in the GCCI group was reported when compared with control patients (1% vs. 17%; p<0.0001). A total of 20 (2%) infectious events were reported, 102 (8%) patients developed a pocket hematoma, and 5 (0.4%) had both. The rate of single complications was significantly lower in GCCI group: infection 0.2% vs. 2.6% (p=0.002), pocket hematoma 0.6% vs. 13.8% (p<0.001). The association between antiplatelet/anticoagulation therapy and hematoma development was not statistically significant. CONCLUSIONS: The GCCI is a medical device that can be used in addition to local hemostasis and prophylactic doses of systemic antibiotics with the aim of reducing infective complications and pocket hematoma after permanent CIED implantation or replacement.
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Desfibriladores Implantables , Marcapaso Artificial , Anticoagulantes/uso terapéutico , Colágeno , Desfibriladores Implantables/efectos adversos , Electrónica , Gentamicinas , Hematoma/etiología , Hematoma/prevención & control , Humanos , Marcapaso Artificial/efectos adversos , Inhibidores de Agregación Plaquetaria/uso terapéutico , Estudios RetrospectivosRESUMEN
BACKGROUND: During the intensive care units' (ICUs) reorganization that was forced by the COVID-19 emergency, attention to traditional infection control measures may have been reduced. Nevertheless, evidence on the effect of the COVID-19 pandemic on healthcare-associated infections (HAIs) is still limited and mixed. In this study, we estimated the pandemic impact on HAI incidence and investigated the HAI type occurring in COVID-19 patients. METHODS: Patients admitted to the main ICU of the Umberto I teaching hospital of Rome from March 1st and April 4th 2020 were compared with patients hospitalized in 2019. We assessed the association of risk factors and time-to-first event through multivariable Fine and Grey's regression models, that consider the competitive risk of death on the development of HAI (Model 1) or device related-HAI (dr-HAI, Model 2) and provide estimates of the sub-distribution hazard ratio (SHR) and its associated confidence interval (CI). A subgroup analysis was performed on the 2020 cohort. RESULTS: Data from 104 patients were retrieved. Overall, 59 HAIs were recorded, 32 of which occurred in the COVID-19 group. Patients admitted in 2020 were found to be positively associated with both HAI and dr-HAI onset (SHR: 2.66, 95% CI 1.31-5.38, and SHR: 10.0, 95% CI 1.84-54.41, respectively). Despite being not confirmed at the multivariable analysis, a greater proportion of dr-HAIs seemed to occur in COVID-19 patients, especially ventilator-associated pneumonia, and catheter-related urinary tract infections. CONCLUSIONS: We observed an increase in the incidence of patients with HAIs, especially dr-HAIs, mainly sustained by COVID-19 patients. A greater susceptibility of these patients to device-related infections was hypothesized, but further studies are needed.
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COVID-19/epidemiología , Infección Hospitalaria/epidemiología , Unidades de Cuidados Intensivos/estadística & datos numéricos , Anciano , Infecciones Relacionadas con Catéteres/epidemiología , Cuidados Críticos , Atención a la Salud , Femenino , Hospitalización , Hospitales de Enseñanza , Humanos , Incidencia , Control de Infecciones , Masculino , Persona de Mediana Edad , Pandemias , Neumonía Asociada al Ventilador/epidemiología , Estudios Retrospectivos , Factores de Riesgo , SARS-CoV-2/aislamiento & purificaciónRESUMEN
BACKGROUND AND OBJECTIVES: Glycemic control has been suggested to improve prognosis in diabetic patients, but recent trials failed to show benefits from intensive glycemic control. Hypoglycaemic episodes or large variability in glucose blood levels causing a sympatho-vagal imbalance of cardiac autonomic function (CAF) might play a role in this result. In our study we assessed whether blood glucose fluctuation may be related to variations in CAF during daily life in diabetic patients with coronary artery disease (CAD). MATERIALS AND METHODS: Twelve patients with type 2 diabetes mellitus with CAD (65+/-4 years, 2 women) underwent simultaneous 48-hour ECG Holter monitoring and continuous interstitial glucose measurements. The highest and lowest glucose levels for each 3-hour segments of the day were identified and heart rate variability (HRV) parameters were measured on Holter recordings on 5-minute intervals centred on these times. RESULTS: Overall, 294 glucose levels were available for analysis. In the whole population several HRV indices were significantly lower in correspondence of the lowest glucose blood levels and this difference was much more evident in patients who were not taking beta-blockers, than in patients who were taking beta-blockers. A significant, although mild, correlation was found between glucose blood levels and several time-and frequency domain HRV variables in patients not taking beta-blockers, but not in these on beta-blockers therapy. DISCUSSION: Our data suggest that, in type 2 diabetic patients with CAD, hypoglycaemic episodes are associated with depressed HRV and that beta-blocking agents are able to contrast this relation. These interesting results merit to be investigated in a larger population of patients.
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Glucemia/metabolismo , Enfermedad de la Arteria Coronaria/etiología , Diabetes Mellitus Tipo 2/complicaciones , Angiopatías Diabéticas/etiología , Corazón/inervación , Hipoglucemia/etiología , Sistema Nervioso Simpático/fisiopatología , Nervio Vago/fisiopatología , Antagonistas Adrenérgicos beta/uso terapéutico , Anciano , Ritmo Circadiano , Enfermedad de la Arteria Coronaria/sangre , Enfermedad de la Arteria Coronaria/tratamiento farmacológico , Enfermedad de la Arteria Coronaria/fisiopatología , Diabetes Mellitus Tipo 2/sangre , Diabetes Mellitus Tipo 2/fisiopatología , Angiopatías Diabéticas/sangre , Angiopatías Diabéticas/tratamiento farmacológico , Angiopatías Diabéticas/fisiopatología , Electrocardiografía Ambulatoria , Femenino , Frecuencia Cardíaca , Humanos , Hipoglucemia/sangre , Hipoglucemia/fisiopatología , Masculino , Persona de Mediana Edad , Proyectos Piloto , Sistema Nervioso Simpático/efectos de los fármacos , Nervio Vago/efectos de los fármacosRESUMEN
In the attempt to optimise the balance between the risk of local recurrence and the cosmetic outcomes in breast surgery, new surgical procedures, so-called oncoplastic techniques, have been introduced in recent years. The term oncoplastic surgery refers to surgery on the basis of oncological principles during which the techniques of plastic surgery are used, mostly for reconstructive and cosmetic reasons. The advantage of the oncoplastic surgery for breast cancer is the possibility of performing a wider excision of the tumour with a good cosmetic result. Oncoplastic surgery is a broad concept that can be used for several different combinations of oncological surgery and plastic surgery: excision of the tumour by reduction mammoplasty, tumour excision followed by remodelling mammoplasty, mastectomy with immediate reconstruction of the breast and partial mastectomy with reconstruction. Careful patient selection and preoperative planning are key components for the success of any oncoplastic operation for breast cancer. Accurate preoperative evaluation of the clinical and biological features of the tumour as well as of the morphological aspects of the breast allow the surgeon to make a decision if a conservative or radical approach is preferable and select the most effective oncoplastic surgical technique. In this review we summarise the indications, advantages and limitations of several oncoplastic procedures.
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Neoplasias de la Mama/cirugía , Mastectomía Segmentaria/métodos , Femenino , Humanos , Mamoplastia , Mastectomía Simple , Colgajos QuirúrgicosRESUMEN
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a common cause of non-typhoideal salmonellosis in humans and animals; since the end of '90 a monophasic serovar defined by the antigenic formula 4,5:i:- has been emerged. This study shows occurrence of monophasic serovar in Italy (Lombardia Region) and analyses antimicrobial resistance of 147 S. Typhimurium and 45 monophasic strains. Multiple drug resistance (MDR) has been detected in 94,5% and 76,6% of 55 porcine and 137 human isolates, respectively; tetra-resistance pattern AmSSuTe is the most common among in both sources (55 out of 116 strains of MDR S. Typhimurium and 16 out of 41 strains of MDR monophasic variant). Transfer of resistance determinants has been investigated by plasmid conjugation for all the 157MDR strains: only 16 isolates (10,2%) gave positive results, and transfer has almost been partial. Data from our investigation and data reported by other studies show a wide difference in the circulating phenotypes and in polymorphism of S. Typhimurium, confirmed also by the emergence of the monophasic serovar.
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Salmonella typhimurium/clasificación , Salmonella typhimurium/efectos de los fármacos , Animales , Farmacorresistencia Bacteriana , Humanos , Pruebas de Sensibilidad Microbiana , Salmonella typhimurium/aislamiento & purificación , Porcinos/microbiologíaRESUMEN
BACKGROUND: Previous preclinical studies of combinations of estramustine and vinblastine or paclitaxel (Taxol) have shown that it is possible to achieve a greater than additive cytotoxicity with these antimicrotubule drug combinations. Phase II studies in hormone-refractory prostate cancer have demonstrated clinical antitumor activity of sufficient magnitude to stimulate further laboratory and clinical studies of these drugs combinations. PURPOSE: Our purpose was to characterize the interactions of estramustine with P-glycoprotein and to determine its effects. METHODS: Standard laboratory techniques were used to study the effects of estramustine on intracellular drug concentrations, cytotoxicity, and induction of messenger RNA (mRNA) for the MDR1 (also known as PGY1) gene. Using a photoaffinity analogue of estramustine 17-0-[[2-[3-(4-azido-3-[125I]-iodophenyl) propionamido]ethyl]-carbamyl]estradiol-3-N-bis(2-chloroethyl)ca rba mate ([125I]AIPP-estramustine), binding to the membrane proteins of human ovarian (SKOV3) and their multidrug-resistant counterpart SKVLB1 cells was studied. Southern-blot analysis was performed on DNA extracted from human prostate carcinoma wild-type DU145, estramustine-resistant cell line (E4), and SKVLB1 cells. RESULTS: Membrane fractions from SKOV3 and SKVLB1 cells were analyzed for proteins that could be photoaffinity labeled with [125I]AIPP-estramustine. Competitive inhibition of this binding was achieved with excess concentrations of (in order of efficacy) estramustine, vinblastine, verapamil, progesterone, and to a lesser degree, by paclitaxel but not with estramustine phosphate, estradiol, and estriol. SKVLB1 cells accumulated much less [3H]vinblastine and [3H]paclitaxel than did SKOV3 cells. Estramustine caused a concentration-dependent enhancement of drug accumulation in the SKVLB1 cells to a maximum of approximately 12-fold. No effect of estramustine was apparent for the wild-type SKOV3 cells. In comparison with verapamil, estramustine was less effective as a modulator; however estramustine demonstrated good chemosensitizing activity in combination with actinomycin D and vinblastine. Neither short-term, low-dose no longer-term, higher concentration were found to produce measurable transcript (mRNA for the MDR1 gene levels. Such data suggest that, at least levels. Such data suggest that, at least for two distinct human cell line (SKOV3 and DU145), estramustine does not induce the overexpression of the MDR1 gene. CONCLUSION: It is apparent from the P-glycoprotein data that estramustine interacts with this efflux pump, altering intracellular drug accumulation. Overall, the nonempiric basis for including estramustine in clinical protocols that contain other multidrug-resistant drugs is strengthened by the present data.
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Proteínas Portadoras/efectos de los fármacos , Estramustina/farmacología , Glicoproteínas de Membrana/efectos de los fármacos , Proteínas de Neoplasias/efectos de los fármacos , Neoplasias Ováricas/tratamiento farmacológico , Neoplasias Ováricas/metabolismo , Miembro 1 de la Subfamilia B de Casetes de Unión a ATP , Proteínas Portadoras/metabolismo , Resistencia a Medicamentos/genética , Estramustina/uso terapéutico , Femenino , Expresión Génica/efectos de los fármacos , Humanos , Glicoproteínas de Membrana/metabolismo , Proteínas de Neoplasias/metabolismo , Neoplasias Ováricas/genética , Fenotipo , Unión Proteica , ARN Mensajero , Células Tumorales CultivadasRESUMEN
Estramustine (EM) and taxol, two antimicrotubule agents with distinct and apparently opposing mechanisms of action, were found to be effective in combination in the preclinical treatment of EM-resistant and sensitive, wild-type human prostatic carcinoma cell lines. Estramustine combined with 1 nM taxol (concentration 100-fold less than that measured in plasma of patients treated with taxol) produced greater than additive effects on the inhibition of cell survival of both wild-type and EM-resistant cells. When taxol was used with another microtubule-destabilizing drug, vinblastine, no significantly increased cytotoxicity was observed. Other effects on wild-type and EM-resistant cells produced by the combination of EM and taxol included (a) an increased proportion of the cells in the S phase of the cell cycle; (b) no mitotic block; and (c) an increase in the percentage of micronucleated cells from a control value of less than 1% to greater than 20% after drug treatment. Immunofluorescent microscopic analysis of the effect of this drug combination on the mitotic spindle apparatus revealed specific examples of aberrant mitotic figures, including multiple asters, cells with two distinct spindles, and tripolar spindles able to traverse mitosis and complete cytokinesis. These data provide supportive preclinical evidence for the potential development of an EM/taxol combination clinical regimen either for prostate or other cancers.
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Protocolos de Quimioterapia Combinada Antineoplásica/farmacología , Carcinoma/tratamiento farmacológico , Microtúbulos/efectos de los fármacos , Neoplasias de la Próstata/tratamiento farmacológico , Alcaloides/farmacología , Antineoplásicos Fitogénicos/farmacología , Carcinoma/ultraestructura , Ciclo Celular/efectos de los fármacos , Ensayos de Selección de Medicamentos Antitumorales , Estramustina/farmacología , Citometría de Flujo , Humanos , Masculino , Pruebas de Micronúcleos , Microtúbulos/ultraestructura , Paclitaxel , Neoplasias de la Próstata/ultraestructura , Células Tumorales Cultivadas , Ensayo de Tumor de Célula MadreRESUMEN
An estramustine-resistant human ovarian carcinoma cell line, SKEM, was generated to explore resistance mechanisms associated with this agent. Cytogenetic analysis revealed that SKEM cells have a homogeneously staining region (hsr) at chromosome 9q34. Microdissection of the hsr, followed by fluorescence in situ hybridization to SKEM and normal metaphase spreads, confirmed that the amplified region was derived from sequences from 9q34. In situ hybridization with a probe specific for ABC2, a gene located at 9q34 that encodes an ATP-binding cassette 2 (ABC2) transporter, indicated that this gene is amplified approximately 6-fold in the estramustine-resistant cells. Southern analysis confirmed that ABC2 was amplified in SKEM, and Northern analysis indicated that the ABC2 transcript was overexpressed approximately 5-fold. The ABC1 gene located at 9q22-31 was not amplified in the resistant cells, and mRNA levels of several other ABC transporter genes were unaltered. Consistent with the concept that increased ABC2 expression contributes to the resistant phenotype, we observed that the rate of efflux of dansylated estramustine was increased in SKEM compared with control cells. In addition, antisense treatment directed toward ABC2 mRNA sensitized the resistant cells to estramustine. Together, these results suggest that amplification and overexpression of ABC2 contributes to estramustine resistance and provides the first indication of a potential cellular function for this product.
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Transportadoras de Casetes de Unión a ATP/genética , Transportadoras de Casetes de Unión a ATP/fisiología , Antineoplásicos Hormonales/farmacocinética , Carcinoma/genética , Carcinoma/metabolismo , Estramustina/farmacocinética , Neoplasias Ováricas/genética , Neoplasias Ováricas/metabolismo , Transportadoras de Casetes de Unión a ATP/biosíntesis , Antineoplásicos Hormonales/farmacología , Carcinoma/patología , Cromosomas Humanos Par 9 , Regulación hacia Abajo , Resistencia a Antineoplásicos , Estramustina/farmacología , Femenino , Amplificación de Genes , Regulación Neoplásica de la Expresión Génica , Humanos , Hibridación Fluorescente in Situ , Oligonucleótidos Antisentido/farmacología , Neoplasias Ováricas/patología , Reacción en Cadena de la Polimerasa , ARN Mensajero/genética , ARN Mensajero/metabolismo , Transcripción Genética , Células Tumorales CultivadasRESUMEN
The protein composition in the extracellular matrix of cultured neonatal rat aortic smooth muscle cells has been monitored over time in culture. The influence of ascorbate on insoluble elastin and collagen has been described. In the absence of ascorbate, the cells accumulate an insoluble elastin component which can account for as much as 50% of the total protein in the extracellular matrix. In the presence of ascorbate, the amount of insoluble collagen increases, while the insoluble elastin content is significantly less. When ascorbate conditions are varied at different times during the culture, the extracellular matrices are altered with respect to collagen and elastin ratios. The decrease in elastin accumulation in the presence of ascorbate may be explained by an overhydroxylation of tropoelastin. Approximately 1/3 of the prolyl residues in the soluble elastin fractions isolated from cultures grown in the presence of ascorbate are hydroxylated. Since the insoluble elastin accumulated in these cultures contain the unique lysine-derived cross-links in amounts comparable to aortic tissue, this culture system proves ideal for studying the influence of extracellular matrix elastin on cell growth and metabolism.
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Ácido Ascórbico/farmacología , Matriz Extracelular/efectos de los fármacos , Músculo Liso Vascular/efectos de los fármacos , Aminoácidos/análisis , Animales , Aorta/efectos de los fármacos , Células Cultivadas , Fenómenos Químicos , Química , Embrión de Pollo , Cromatografía Líquida de Alta Presión , Colágeno/metabolismo , Elastina/metabolismo , Matriz Extracelular/metabolismo , Matriz Extracelular/ultraestructura , Microscopía Electrónica , Proteínas Musculares/metabolismo , Músculo Liso Vascular/metabolismo , Músculo Liso Vascular/ultraestructura , Proteína-Lisina 6-Oxidasa/metabolismo , Ratas , SolubilidadRESUMEN
The polymerase chain reaction (PCR) was used to identify the presence of DNA sequences homologous to HIV-1 in the buffy-coat leukocytes of antibody-positive and antibody-negative individuals in a haemophiliac population. The presence of HIV sequences was demonstrated in all of the antibody-positive haemophiliacs with the exception of one patient who was repeatedly negative. None of the seronegative haemophiliacs gave an overall positive result, although there were clear differences between this population and the negative controls who were examined. We conclude that, in our hands, PCR represents a reliable test which represents a useful diagnostic advance in HIV medicine.
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ADN Viral/sangre , Infecciones por VIH/diagnóstico , Seropositividad para VIH/sangre , Hemofilia A/sangre , Reacción en Cadena de la Polimerasa , Secuencia de Bases , Estudios de Evaluación como Asunto , VIH/genética , VIH/aislamiento & purificación , Infecciones por VIH/microbiología , Seropositividad para VIH/microbiología , Hemofilia A/microbiología , Linfocitos/microbiología , Datos de Secuencia Molecular , Provirus/aislamiento & purificación , Factores de RiesgoRESUMEN
Normal rat osteoblasts in culture undergo a developmental sequence consisting of a proliferation period in which high levels of the histone and collagen type I genes are expressed, followed by periods of matrix maturation [high levels of alkaline phosphatase (AP)] and mineralization that signal a high level of production of osteopontin (OP) and osteocalcin (OC). Since these parameters are regulated by vitamin D, the effects of both short term and chronic treatment with 1,25-dihydroxyvitamin D3 were examined during osteoblast growth and differentiation. In acute studies, during the proliferation period, histone mRNA (reflecting DNA synthesis) was inhibited (20-60%). Matrix Gla protein (MGP) and OP mRNA were significantly elevated during proliferation (30- and 15-fold), in contrast to OC which is not expressed and was not induced by hormone treatment. OP and MGP remained stimulated throughout the developmental sequence, but to a lesser degree (from 6- to 10-fold). Collagen and AP mRNA were inhibited by hormone at their peak levels of expression, but were stimulated at their lowest basal levels in the mineralization period. OC expression, which was initiated at the onset of mineralization, was stimulated 13- to 15-fold when basal levels were low, then from 6- to 8-fold by hormone throughout its period of expression. In chronic studies a different profile of gene expression was observed. When hormone treatment was initiated during the proliferation period on day 6, type I collagen and AP expression were suppressed, mineralized nodules did not develop, and induced levels of OP and OC gene expression did not occur. When chronic treatment was initiated on day 20 after the development of a mineralized matrix, OC, but not collagen and OP, levels were stimulated by the hormone. This observation is consistent with the requirement of a competent or mineralized bone matrix for expression of OC. In contrast, MGP expression was stimulated in the chronic vitamin D-treated cultures similar to acute treatments. Taken together these studies demonstrate that vitamin D, a physiological mediator of bone formation and remodelling, can both positively and negatively regulate expression of osteoblast phenotypic markers as a function of duration of hormone treatment and basal levels of gene expression, which is a reflection of bone matrix competency and the differentiated state of the osteoblast.
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Matriz Ósea/fisiología , Regulación de la Expresión Génica , Osteoblastos/fisiología , Vitamina D/farmacología , Animales , Diferenciación Celular , División Celular , Células Cultivadas , Osteoblastos/metabolismo , Fenotipo , Proteínas/metabolismo , Ratas , Valores de Referencia , Factores de TiempoRESUMEN
The normal population of neurons and their distributions within the dorsal nucleus of the lateral lemniscus were studied in both Nissl-stained celloidin and frozen sections and in Golgi impregnations from brains of mature cats. According to axial measurements of somata in Nissl-stained material, neurons of the dorsal nucleus of the lateral lemniscus (DNLL) were classified by width:length ratio (r) into round (0.80 less than or equal to r less than or equal to 1.0), ovoid (0.65 < r < 0.80), or elongate (r less than or equal to 0.65) types. These same neurons could also be classed by average diameter (Dm) as large (Dm greater than or equal to 22), medium (12.0 less than or equal to Dm < 22.0), or small (Dm < 12.0). A combination of data on ratios (shape) and average diameters (size) provided the following possible categories of Nissl-stained, DNLL neurons: large round (LR), large ovoid (LO), large elongate (LE), medium round (MR), medium ovoid (MO), medium elongate (ME), small round (SR), small ovoid (SQ), and small elongate (SE). Very few small cells were found, however. Quantitative studies of the distributions of cell type within the whole DNLL showed (1) most medium-sized and most LE cells in the caudal third of the DNLL and (2) most LO and LR cells dorsally located in the rostral third of the DNLL. There were progressively more large and more round types along the caudal-to-rostral axis. In Golgi impregnations of the DNLL, all medium and large cell types, but no small cell types (defined in the Nissl study) were found. Golgi material showed (1) subdivisions of the LO class into vertical (LOV) and horizontal (LOH) types, and (2) radiate (MRR) and oriented (MRO) subclasses of MR neurons according to dendritic arbor and cytology, orientation within the DNLL, and axonal morphology. Examples from all classes of large cells (particularly, LE cells) could have ventrally directed axons. These ventrally directed axons might be efferents to the cochlear nucleus, known from our previous work. A strong horizontal orientation of most DNLL cell somata and dendrites, shown in both our Nissl and Golgi material, is discussed in relation to known inputs to the DNLL. Correlations of our morphological findings with limited electrophysiological data on the DNLL are also discussed.
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Nervio Coclear/anatomía & histología , Colículos Inferiores/anatomía & histología , Núcleo Olivar/anatomía & histología , Puente/anatomía & histología , Animales , Vías Auditivas/anatomía & histología , Gatos , Dendritas/ultraestructura , Neuronas/ultraestructura , Sinapsis/ultraestructuraRESUMEN
In this study a canine model was developed to investigate the nature of early healing responses to both chondral and osteochondral defects and to evaluate the tissue regenerative capacity of cultured autologous chondrocytes in chondral defects. The healing response to surgically created chondral defects was minor, with little cellular infiltration. In contrast, osteochondral defects exhibited a rapid cellular response, resulting ultimately in the formation of fibrous tissue. The lack of significant cellular activity in chondral defects suggests that an evaluation of the capacity of cultured autologous chondrocytes to regenerate articular cartilage is best studied in chondral defects using the canine model. When dedifferentiated cultured articular chondrocytes were implanted into chondral defects, islands of type II collagen staining were demonstrated in the regenerative tissue within 6 weeks. The relatively early expression of cartilage specific markers by the implanted chondrocytes, coupled with the inability of untreated chondral defects to repair or regenerate, demonstrates the utility of the canine model in evaluating novel materials for cartilage repair and regeneration.
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Cartílago Articular/citología , Trasplante de Células/rehabilitación , Osteocondritis/terapia , Regeneración/fisiología , Animales , Matriz Ósea/metabolismo , Cartílago Articular/fisiología , Comunicación Celular/fisiología , Diferenciación Celular/fisiología , Células Cultivadas , Colágeno/metabolismo , Modelos Animales de Enfermedad , Perros , Fibrina/metabolismo , InmunohistoquímicaRESUMEN
The implementation and pharmacoeconomic analysis of a clinical staff pharmacist (CSP) practice model are described. Staff pharmacists at a large, tertiary care, academic medical center were selected and trained to perform clinical pharmacy services under the direction of clinical pharmacy specialist mentors. Clinical interventions by these CSP practitioners were evaluated in terms of direct cost savings (the difference in actual acquisition costs between therapies) and cost avoidance (the dollar value of adverse drug events [ADEs] avoided). The CSPs performed a total of 4959 interventions during a 12-month period. The interventions provided direct cost savings of $92,076 and an estimated cost avoidance of $488,436. Comparing cost savings and cost avoidance with the expenses of providing these services indicated a net economic benefit of $392,660. A new model of pharmacy practice that integrates staff pharmacists into existing clinical practice has the potential to minimize the risks, decrease the costs, and improve the outcomes associated with drug therapy.
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Monitoreo de Drogas/economía , Evaluación de Resultado en la Atención de Salud/economía , Personal de Hospital/economía , Farmacéuticos/economía , Servicio de Farmacia en Hospital/economía , Ahorro de Costo/economía , Monitoreo de Drogas/métodos , HumanosRESUMEN
OBJECTIVES: A study was undertaken to determine which nutritional assessment tool would be better in assessing changes in nutritional status over time in hospitalised older patients. The two tools used were the Mini Nutritional Assessment (MNA) and the Subjective Global Assessment (SGA). DESIGN: Single blind, prospective study conducted over a 60-day period. SETTING: Five regional hospitals within Southern New South Wales, Australia. SUBJECTS: There were 43 patients at the commencement of the study, then 28 patients at day 30 and 20 patients at day 60. METHODS: All patients over 65 years of age admitted to the five hospitals during May 2001 were eligible. The only exclusions were those patients admitted to palliative care or with severe dementia. Two dietitians saw each patient. Each dietitian assessed the patient using his or her assigned nutritional assessment tool either the SGA or the MNA. All dietitians were randomly assigned the tool at the commencement of the study. They were familiarised with the use of the tool by participating in a workshop prior to the start of the study. RESULT: The MNA was able to detect greater numbers of malnourished subjects when compared to the SGA. This finding was consistent across Day 0, 30 and 60 and statistically significant (p<0.05) at all time periods. CONCLUSIONS: This study has shown the MNA to be a more appropriate nutrition assessment tool for older patients when compared to the SGA. The MNA is better able to identify severely malnourished patients. This study illustrated the potential use of the MNA as an ongoing monitor of nutritional status and hence a measure of the impact of nutrition intervention.
Asunto(s)
Evaluación Geriátrica/estadística & datos numéricos , Evaluación Nutricional , Trastornos Nutricionales/diagnóstico , Estado Nutricional/fisiología , Anciano , Anciano de 80 o más Años , Envejecimiento/fisiología , Australia , Femenino , Hospitalización , Humanos , Masculino , Estudios Prospectivos , Método Simple Ciego , Estadísticas no Paramétricas , Factores de TiempoRESUMEN
Two horses were presented with lethargy, weight loss, anorexia, and swelling of the limbs and ventral body wall. One horse, a 12-month-old American Paso Fino colt, also had acute abdominal pain. The other horse, a seven-month-old Tennessee Walking Horse (TWH) filly passed diarrheic stools during the initial examination. Each horse had low serum protein, neutropenia, and a normal packed cell volume (3.2 g/dl, 1300 cells/ul, and 38%, respectively, for the colt, and 2.4 g/dl, 696 cells/ul, and 44%, respectively for the filly). After intravenously administering plasma, the colt's PCV dropped to 23%, and the filly's dropped to 30%. During exploratory surgery, 3.5 and 2.0 meters of thickened terminal small intestine were removed from the colt and filly respectively, and a jejunocecostomy performed. The results of histologic examination of resected intestine were consistent with a diagnosis of equine granulomatous enteritis (EGE). Both horses showed clinical improvement within two days after surgery. The colt developed a neutrophilia (20,500 cells/ul) within 24 hours of surgery. Serum protein concentrations remained stable and gradually elevated to normal or near normal values of 7.0 g/dl (colt) and 5.8 g/dl (filly) by two weeks. The colt was killed four months after surgery because of signs of abdominal pain. Postmortem examination revealed a small intestinal volvulus associated with an adhesion. The TWH filly remains clinically normal 13 months after surgery.
Asunto(s)
Enteritis/veterinaria , Granuloma/veterinaria , Enfermedades de los Caballos/cirugía , Animales , Cecostomía/veterinaria , Colon/patología , Enteritis/patología , Enteritis/cirugía , Femenino , Granuloma/patología , Granuloma/cirugía , Enfermedades de los Caballos/patología , Caballos , Yeyunostomía/veterinaria , Yeyuno/patología , MasculinoRESUMEN
BACKGROUND/OBJECTIVES: Older malnourished patients experience increased surgical complications and greater morbidity compared with their well-nourished counterparts. This study aimed to assess whether nutritional status at hospital admission predicted clinical outcomes at 18 months follow-up. SUBJECTS/METHODS: A retrospective analysis of N=2076 patient admissions (65+ years) from two subacute hospitals, New South Wales, Australia. Analysis of outcomes at 18 months, according to nutritional status at index admission, was performed in a subsample of n = 476. Nutritional status was determined within 72 h of admission using the Mini Nutritional Assessment (MNA). Outcomes, obtained from electronic patient records, included hospital readmission rate, total Length of Stay (LOS), change in level of care at discharge and mortality. Survival analysis, using a Cox proportional hazards model, included age, sex, Major Disease Classification, mobility and LOS at index admission as covariates. RESULTS: At baseline, 30% of patients were malnourished and 53% were at risk of malnutrition. LOS was higher in malnourished and at risk, compared with well-nourished patients (median (interquartile range): 34 (21, 58); 26 (15, 41); 20 (14, 26) days, respectively; P<0.001). Hazard rate for death in the malnourished group is 3.41 (95% confidence interval: 1.07-10.87; P = 0.038) times the well-nourished group. Discharge to a higher level of residential care was 33.1%, 16.9% and 4.9% for malnourished, at-risk and well-nourished patients, respectively; P ≤ 0.001). CONCLUSION: Malnutrition in elderly subacute patients predicts adverse clinical outcomes and identifies a need to target this population for nutritional intervention following hospital discharge.