RESUMEN
Docetaxel (DTX) is a key drug used in perioperative chemotherapy for breast cancer. Edema is a known adverse effect of DTX, but its effect on health-related QOL (HRQOL) is unclear. In this study, we evaluated the effects of edema caused by administration of DTX on HRQOL in patients with early-stage breast cancer. We prospectively investigated patients diagnosed with early-stage breast cancer (stage I-III) who received 4 cycles of DTX as preoperative or postoperative chemotherapy between September 2021 and December 2022 at Yamanashi Prefectural Central Hospital. The circumference of each extremity was measured at each administration of DTX, and limb edema was evaluated by Common Terminology Criteria for Adverse Events version 5.0. HRQOL was evaluated using SF-12 version 2, which has a range of 0-100 (national standard, 50), and compared between the presence and absence of grade 2 or higher edema and between before and after administration of DTX. Twenty patients met the eligibility criteria and were included in the study. There was no difference in the HRQOL score according to whether grade 2 limb edema was present. The median HRQOL summary scores before and after administration of DTX were 51.1 and 50.8 (p=0.763), respectively, for mental health, 52.6 and 49.4 (p=0.005) for physical health, and 38.9 and 37.5 (p=1.000) for role/social health. We found no direct effect of DTX-induced limb edema on HRQOL in patients with early-stage breast cancer. However, HRQOL summary scores indicated that administration of DTX reduced physical health in these patients.
Asunto(s)
Neoplasias de la Mama , Docetaxel , Edema , Calidad de Vida , Humanos , Docetaxel/efectos adversos , Docetaxel/administración & dosificación , Neoplasias de la Mama/tratamiento farmacológico , Femenino , Estudios Prospectivos , Persona de Mediana Edad , Edema/inducido químicamente , Edema/etiología , Anciano , Estadificación de Neoplasias , Adulto , Extremidades , Antineoplásicos/efectos adversos , Atención PerioperativaRESUMEN
"Academic detailing" is used to clearly explain scientific issues. In the field of clinical practice, "academic detailing" is a form of interactive educational outreach to physicians in order to provide unbiased, non-commercial, evidence-based information about medications and other therapeutic modalities, with the goal of improving patient care. It is necessary to provide proper information about prescription drugs for their appropriate use in clinical practice. However, this requires of physicians significant time and labor to comprehensively collect and summarize all necessary information for the proper clinical application of pharmaceutical products, a task which may be both difficult and prohibitive to a busy physician. However, if clinical experience and other pharmaceutical or treatment information is derived solely from the commercial entities, this may lead to improper prescription practices. In western countries, public funds are used to support universities and other research institution programs. In Canada, clinical pharmacists act as "detailers". Their mission and role is to listen to the needs of the physician or health care professional, to provide objective, evidence-based drug information on selected drug therapy topics, to educate physicians on the optimal use of medications, to provide practical alternatives, and to extend the physician's usable knowledge base. The importance of this "academic detailing" activity is also recognized in Japan, and pharmacists can be expected to act as detailers in the future. We hope that this will lead to improvement in the quality of medical care.
Asunto(s)
Servicios de Información sobre Medicamentos , Quimioterapia , Atención al Paciente , Farmacéuticos , Médicos , Medicamentos bajo Prescripción , Mejoramiento de la Calidad , Calidad de la Atención de Salud , Análisis Costo-Beneficio , Quimioterapia/economía , Educación Médica Continua , Humanos , Prescripción Inadecuada/prevención & control , Medicamentos bajo Prescripción/economía , Rol ProfesionalRESUMEN
Linezolid (LZD) is an antimicrobial that is commonly used for treatment of vancomycin-resistant Enterococci and methicillin-resistant Staphylococcus aureus infections. However, the development of thrombocytopenia, one of the most frequent adverse side effects of this antimicrobial, can lead to discontinuation of LZD treatment. While clinical studies indicate that risk factors for the development of LZD-induced thrombocytopenia include treatment for >14 consecutive days, renal dysfunction, and chronic liver disease, the fundamental mechanism governing the pathogenesis of this disorder remains unclear. In this study, we aimed to elucidate the mechanism of LZD-induced thrombocytopenia by investigating the impact of LZD treatment on platelet destruction and production using rat platelet-rich plasma (PRP) and human immortalized cell lines, respectively. Compared to the control population, an increase in lactate dehydrogenase release was not detected upon exposure of rat PRP to varying concentrations of LZD, indicating that this compound is not cytotoxic towards platelets. Meanwhile, LZD treatment resulted in a significant dose-dependent increase in the proliferation of HEL human erythroleukemia and MEG-01 human megakaryoblast cells in vitro, but did not influence the differentiation of these cell lines. Lastly, LZD treatment yielded elevated levels of phosphorylation of myosin light chain 2 (MLC2), which regulates platelet release, in MEG-01 cells. Based on these results, we speculate that LZD induces thrombocytopenia by promoting MLC2 phosphorylation and thereby suppressing the release of platelets from mature megakaryocytes. These findings provide the first insight into the mechanism of LZD-mediated thrombocytopenia and may facilitate the development of strategies to treat and/or prevent this disease.
Asunto(s)
Antibacterianos/efectos adversos , Plaquetas/efectos de los fármacos , Miosinas Cardíacas/metabolismo , Linezolid/efectos adversos , Cadenas Ligeras de Miosina/metabolismo , Trombocitopenia/metabolismo , Animales , Plaquetas/metabolismo , Diferenciación Celular/efectos de los fármacos , Línea Celular , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Humanos , L-Lactato Deshidrogenasa/metabolismo , Masculino , Fosforilación/efectos de los fármacos , Ratas Wistar , Trombocitopenia/inducido químicamenteRESUMEN
Clenbuterol is a long-acting ß2-adrenoceptor agonist and bronchodilator that is used for the treatment of asthma, but the desired activities reside almost exclusively in the (-)-R-enantiomer. This study examined enantioselectivity in the disposition of clenbuterol following administration of clenbuterol racemate to rats. Concentrations of clenbuterol enantiomers in plasma, urine and bile were determined by LC-MS/MS assay with a Chirobiotic T column. This method was confirmed to show high sensitivity, specificity and precision, and clenbuterol enantiomers in 0.1 ml volumes of plasma were precisely quantified at concentrations as low as 0.25 ng/ml. The pharmacokinetic profiles of clenbuterol enantiomers following intravenous and intraduodenal administration of clenbuterol racemate (2 mg/kg) in rats were significantly different. The distribution volume of (-)-R-clenbuterol (9.17 l/kg) was significantly higher than that of (+)-S-clenbuterol (4.14 l/kg). The total body clearance of (-)-R-clenbuterol (13.5 ml/min/kg) was significantly higher than that of the (+)-S-enantiomer (11.5 ml/min/kg). An in situ absorption study in jejunal loops showed no difference in the residual amount between the (-)-R- and (+)-S-enantiomers. Urinary clearance was the same for the two enantiomers, but biliary excretion of (-)-R-clenbuterol was higher than that of the (+)-S-enantiomer. The fractions of free (non-protein-bound) (-)-R- and (+)-S-clenbuterol in rat plasma were 48.8% and 33.1%, respectively. These results indicated that there are differences in the distribution and excretion of the clenbuterol enantiomers, and these may be predominantly due to enantioselective protein binding.
Asunto(s)
Agonistas Adrenérgicos beta/química , Agonistas Adrenérgicos beta/farmacocinética , Clenbuterol/química , Clenbuterol/farmacocinética , Agonistas Adrenérgicos beta/sangre , Agonistas Adrenérgicos beta/orina , Animales , Bilis/química , Proteínas Sanguíneas/metabolismo , Clenbuterol/sangre , Clenbuterol/orina , Masculino , Unión Proteica , Ratas Wistar , Estereoisomerismo , Distribución TisularRESUMEN
Peripheral neuropathy is a common side effect of the chemotherapeutic agent oxaliplatin (Oxp), and is associated with hypersensitivity to cold sensation in the acute stage. Recently, gosha-jinki-gan (GJG), a Japanese herbal medicine, was reported to improve Oxp-induced cold hypersensitivity. However, the mechanism for this effect was not elucidated. We hypothesized that the effect of GJG on Oxp-induced cold hypersensitivity may be associated with the expression of the transient receptor potential melastatin 8 (TRPM8) and transient receptor potential ankyrin 1 (TRPA1) channels, which are cold-gated ion channels. To assess this hypothesis, we examined alteration of the withdrawal response to cold stimulation following coadministration of GJG and Oxp in rats, and the relationship between this altered withdrawal response and the expression of TRPM8 and TRPA1 mRNA in the dorsal root ganglia (DRG). Assessment of cold hypersensitivity was performed at 4 and 10°C using a cold plate. Compared with Oxp administration alone, coadministration of GJG (oral dose: 1 g/kg/day for 12 days) and Oxp (intraperitoneal dose: 4 mg/kg twice a week) significantly reduced the withdrawal response to cold stimulation. On the 12th day of drug administration, the L4-L6 DRG were removed and the expression of TRPM8 and TRPA1 mRNA was determined using RT-PCR. The expression of TRPM8 and TRPA1 in the DRG of rats that were coadministered GJG and Oxp decreased significantly compared with that in the rats administered Oxp alone. These results suggest that coadministration of GJG may improve Oxp-induced cold hypersensitivity by suppressing the overexpression of TRPM8 and TRPA1 mRNA.
Asunto(s)
Antineoplásicos/efectos adversos , Frío , Medicamentos Herbarios Chinos/farmacología , Hiperalgesia/tratamiento farmacológico , Compuestos Organoplatinos/efectos adversos , Enfermedades del Sistema Nervioso Periférico/tratamiento farmacológico , Canales Catiónicos TRPC/metabolismo , Canales Catiónicos TRPM/metabolismo , Animales , Medicamentos Herbarios Chinos/uso terapéutico , Hiperalgesia/inducido químicamente , Hiperalgesia/metabolismo , Masculino , Oxaliplatino , Enfermedades del Sistema Nervioso Periférico/inducido químicamente , Enfermedades del Sistema Nervioso Periférico/metabolismo , Ratas , Sensación/efectos de los fármacos , Canal Catiónico TRPA1 , Canales Catiónicos TRPC/genética , Canales Catiónicos TRPM/genéticaRESUMEN
We investigated the use of multiple antipsychotics and the manifestation of side effects in outpatients with schizophrenia and compared the results of patients who received 1 antipsychotic (monotherapy) with those of patients who received more than 1 antipsychotic (multidrug therapy). To achieve this, we visited 8 community life-support centers and conducted a face-to-face questionnaire survey with 47 outpatients. Sixteen (34%) of these patients had received monotherapy and 31 (66%), multidrug therapy. Complaints involving the central nervous system, anticholinergic symptoms, metabolic symptoms (weight gain, increase in blood glucose, etc.), and extrapyramidal symptoms were seen across the patients. The average incidence of side effects was 2.2 per person in the monotherapy group and 4.8 in the multidrug-therapy group. The number of nonantipsychotic drugs used concomitantly in the monotherapy group was also smaller than that used in the multidrug-therapy group (2.3 and 5.0 per person, respectively). Further, we analyzed the 47 patients as described above; 20 patients received typical antipsychotics (TA group), 10 patients received atypical antipsychotics (AA group), and 17 patients received both typical and atypical antipsychotics (MIX group). The average incidence of side effects in the TA, AA, and MIX groups was 2.8, 3.2, and 5.5 per person, respectively, and the number of nonantipsychotic drugs used concomitantly was 2.2, 3.2, and 6.1, respectively. On the basis of our results, it can be suggested that monotherapy with an atypical antipsychotic can reduce both the number of nonantipsychotic drugs used concomitantly and the average incidence of side effects.
Asunto(s)
Antipsicóticos/administración & dosificación , Antipsicóticos/efectos adversos , Enfermedades de los Ganglios Basales/inducido químicamente , Enfermedades de los Ganglios Basales/epidemiología , Esquizofrenia/tratamiento farmacológico , Encuestas y Cuestionarios , Adulto , Anciano , Antipsicóticos/clasificación , Quimioterapia Combinada , Femenino , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Pacientes Ambulatorios , Cooperación del Paciente , Adulto JovenRESUMEN
To determine the effectiveness of human chorionic gonadotropin (hCG) administered rectally, we studied the pharmacokinetics and pharmacodynamics of hCG using a hollow-type suppository. HCG was not detected in plasma when only hCG was administered rectally, even at a higher dose (4,000 IU/kg body weight) than intravenous injection, because of its low bioavailability due to high molecular weight or degradation by proteolytic activity. To enhance the rectal absorption of hCG, the effectiveness of its coadministration with alpha-cyclodextrin (alpha-CyD), an absorption-enhancing agent, was investigated in male rabbits. HCG was detected in plasma following coadministration of hCG and alpha-CyD (10 mg/kg body weight) into the rectum. The plasma hCG concentration increased with increasing dose of alpha-CyD. The AUC(0-48) observed after coadministration of hCG and alpha-CyD at 30 mg/kg body weight was approximately four times higher than that of hCG and alpha-CyD at 10mg/kg body weight. HCG at a high concentration induced a rapid increase in the plasma testosterone concentration (74.2 +/- 3.4 ng/ml) 2 h after intravenous administration. However, the testosterone concentration 24 h after intravenous administration decreased to the physiological level (approximately 20 ng/ml) which had been observed before such administration. On the other hand, the maximum level of testosterone concentration (40.0 +/- 12.6 ng/ml) was observed 24 h after rectal administration of hCG (400 IU/kg body weight) in combination with alpha-CyD (30 mg/kg body weight). Moreover, the plasma testosterone concentration (31.0 +/- 11.4 ng/ml) obtained 72 h after rectal administration tended to be maintained at a higher level than that (14.4 +/- 0.9ng/ml) observed before the administration. These results suggest that the hollow-type suppository as a rectal delivery system of hCG is promising as a new mode of hCG therapy.
Asunto(s)
Gonadotropina Coriónica/farmacología , Gonadotropina Coriónica/farmacocinética , alfa-Ciclodextrinas , Administración Rectal , Animales , Área Bajo la Curva , Gonadotropina Coriónica/administración & dosificación , Ciclodextrinas , Humanos , Inyecciones Intravenosas , Masculino , Conejos , Supositorios , Testosterona/sangreRESUMEN
To investigate the transport function of the blood-brain barrier (BBB), we employed an in vitro model of the BBB, consisting of a co-culture of porcine brain capillary endothelial cells (BCECs) with rat astrocytes. Porcine BCECs were cultured on a filter insert with rat astrocytes on the underlying plastic well. Rat astrocytes induced characteristic BBB properties of porcine BCECs, such as gamma-glutamyl-transpeptidase activity and intercellular adhesion of porcine BCECs. Next, the transport properties of P-glycoprotein (P-gp) substrate and several anionic compounds across the co-cultured porcine BCECs were characterized. Expression of P-gp was detected by immunocytochemistry, and efflux-directed transport of the P-gp substrate [(3)H]daunomycin was observed. Luminal-to-abluminal transport of the monocarboxylic acid transporter 1 (MCT1) substrate [(14)C]benzoic acid was saturable, and the K(m) value (3.05 mM) was similar to that for brain uptake observed in vivo. Abluminal-to-luminal transport of [(14)C]benzoic acid was also saturable, indicating that the monocarboxylic acid transporter of the BBB contributes to the efflux from the brain as well as to blood-to-brain influx. Abluminal-to-luminal transport of organic anions, [(3)H]dehydroepiandrosterone sulfate, [(3)H]estrone sulfate and [(3)H]estradiol 17beta-D-glucuronide was significantly higher than the corresponding luminal-to-abluminal transport. These results demonstrate the presence of multiple efflux transport pathways in this in vitro model.