RESUMEN
The ligands of chemokine receptors 2 and 5 (CCR2 and CCR5, respectively) are associated with the pathomechanism of neuropathic pain development, but their role in painful diabetic neuropathy remains unclear. Therefore, the aim of our study was to examine the function of these factors in the hypersensitivity accompanying diabetes. Additionally, we analyzed the analgesic effect of cenicriviroc (CVC), a dual CCR2/CCR5 antagonist, and its influence on the effectiveness of morphine. An increasing number of experimental studies have shown that targeting more than one molecular target is advantageous compared with the coadministration of individual pharmacophores in terms of their analgesic effect. The advantage of using bifunctional compounds is that they gain simultaneous access to two receptors at the same dose, positively affecting their pharmacokinetics and pharmacodynamics and consequently leading to improved analgesia. Experiments were performed on male and female Swiss albino mice with a streptozotocin (STZ, 200 mg/kg, i.p.) model of diabetic neuropathy. We found that the blood glucose level increased, and the mechanical and thermal hypersensitivity developed on the 7th day after STZ administration. In male mice, we observed increased mRNA levels of Ccl2, Ccl5, and Ccl7, while in female mice, we observed additional increases in Ccl8 and Ccl12 levels. We have demonstrated for the first time that a single administration of cenicriviroc relieves pain to a similar extent in male and female mice. Moreover, repeated coadministration of cenicriviroc with morphine delays the development of opioid tolerance, while the best and longest-lasting analgesic effect is achieved by repeated administration of cenicriviroc alone, which reduces pain hypersensitivity in STZ-exposed mice, and unlike morphine, no tolerance to the analgesic effects of CVC is observed until Day 15 of treatment. Based on these results, we suggest that targeting CCR2 and CCR5 with CVC is a potent therapeutic option for novel pain treatments in diabetic neuropathy patients.
Asunto(s)
Antagonistas de los Receptores CCR5 , Neuropatías Diabéticas , Modelos Animales de Enfermedad , Receptores CCR2 , Receptores CCR5 , Animales , Ratones , Neuropatías Diabéticas/tratamiento farmacológico , Masculino , Receptores CCR2/antagonistas & inhibidores , Receptores CCR2/metabolismo , Femenino , Receptores CCR5/metabolismo , Receptores CCR5/genética , Antagonistas de los Receptores CCR5/farmacología , Antagonistas de los Receptores CCR5/uso terapéutico , Morfina/farmacología , Morfina/uso terapéutico , Diabetes Mellitus Experimental/tratamiento farmacológico , Diabetes Mellitus Experimental/complicaciones , Analgésicos/farmacología , Analgésicos/uso terapéutico , Hiperalgesia/tratamiento farmacológico , Imidazoles , SulfóxidosRESUMEN
AIM: The main goal of this study was to asses the possibility of using mass production structured-light 3d scanner to asses human body posture. MATERIALS AND METHODS: The study was conducted on a healthy 23 year old volunteer and a lay-figure. The experiment consisted of 28 3D scans, divided into three separate tests. RESULTS: The largest deviation observed in the first two trials was 24.42 mm. While the largest deviation observed in the third trial was 49.91 mm. CONCLUSIONS: Data obtained with the mass production structured-light 3d scanner may have comparable or better performance than commercially available systems for the assessment of BP.
Asunto(s)
Antropometría/instrumentación , Imagenología Tridimensional/instrumentación , Luz , Examen Físico/instrumentación , Postura/fisiología , Adulto , Puntos Anatómicos de Referencia , Diseño de Equipo , Humanos , Imagenología Tridimensional/métodos , Modalidades de Fisioterapia/instrumentación , Proyectos Piloto , Valores de Referencia , Reproducibilidad de los Resultados , Curvaturas de la Columna Vertebral/diagnóstico , Adulto JovenRESUMEN
Corpus luteum (CL) is a reproductive gland that plays a crucial endocrine role in the regulation of the estrous cycle, fertility, and pregnancy in cattle. The main function of CL is secretion of progesterone (P4), an important hormone for establishment a successful pregnancy, whereas prostaglandin F(2alpha) (PGF(2alpha)), 17beta-estradiol (E(2)) and testosterone (T) are implicated in the regulation of luteolysis. It has been shown that phytoestrogens may disrupt numerous reproductive functions on several levels of regulation and via different intracellular mechanisms. Using a cell-culture system of steroidogenic cells of the bovine CL, we determined effects of active phytoestrogen metabolites (equol and para-ethyl-phenol) on PGF(2alpha), P4, and T synthesis in steroidogenic CL cells. Moreover, we examined the intracellular mechanisms of phytoestrogen metabolite actions. Phytoestrogen metabolites did not affect P4 production in steroidogenic CL cells. However, PGF(2alpha) and T were significantly stimulated by metabolites of phytoestrogens in the bovine steroidogenic CL cells. To study the intracellular mechanism of endogenous E(2) and phytoestrogen metabolites action, steroidogenic cells were preincubated with a phospholipase C inhibitor (U73122), a protein kinase C inhibitor (staurosporine), an estrogen receptor antagonist (ICI) and a transcription inhibitor (actinomycin D) for 0.5h, and then stimulated with para-ethyl-phenol, equol or E(2). Only U73122 and staurosporine totally reduced the stimulatory effect of E(2) on PGF(2alpha) production by the cells. ICI and actinomycin D only partially reduced E(2) action on CL cells. In contrast, the stimulatory effect of phytoestrogen metabolites was totally inhibited by ICI and actinomycin D. Moreover, in contrast to E(2) action, phytoestrogen metabolites did not cause intracellular calcium mobilization in the cells. The present study demonstrated that phytoestrogen metabolites stimulate PGF(2alpha) secretion in steroidogenic cells of the bovine CL via the estrogen receptor-dependent, genomic pathway.
Asunto(s)
Bovinos/metabolismo , Cuerpo Lúteo/metabolismo , Dinoprost/metabolismo , Isoflavonas/farmacología , Fenoles/farmacología , Animales , Calcio/metabolismo , Células Cultivadas , Cuerpo Lúteo/citología , Dactinomicina/metabolismo , Dactinomicina/farmacología , Dieta , Equol , Estrenos/metabolismo , Estrenos/farmacología , Femenino , Isoflavonas/metabolismo , Hormona Luteinizante/metabolismo , Hormona Luteinizante/farmacología , Fenoles/metabolismo , Fitoestrógenos/metabolismo , Pirrolidinonas/metabolismo , Pirrolidinonas/farmacología , Glycine max/química , Estaurosporina/metabolismo , Estaurosporina/farmacología , Linfocitos T/metabolismo , Acetato de Tetradecanoilforbol/análogos & derivados , Acetato de Tetradecanoilforbol/metabolismo , Acetato de Tetradecanoilforbol/farmacologíaRESUMEN
The aim of this study was to examine whether active metabolites of phytoestrogens (equol and para-ethyl-phenol) inhibit sensitivity of bovine corpus luteum (CL) to luteinizing hormone (LH) and to auto/paracrine luteotropic factors (prostaglandin E2-PGE2 and prostaglandin F(2alpha)-PGF(2alpha)), and whether they influence pulsatile progesterone (P4) secretion by the bovine CL. In in vivo experiments, high levels of equol and para-ethyl-phenol were found in plasma and in the CL tissue of heifers and cows fed a soy bean diet (2.5 kg/animal/day), along with lower concentrations of P4 (P < 0.05). Both Prostaglandins (PG) and LH strongly stimulated P4 secretion in cultured pieces of CL that were collected from cows fed a standard diet (P < 0.01). There was no effect of PGs and LH on P4 stimulation in CLs obtained from cows fed a diet rich in soy bean. Finally, we examined whether active metabolites of phytoestrogens participated in regulation of pulsatile P4 secretion and LH-stimulated P4 secretion in vitro using a microdialysis system. Equol and para-ethyl-phenol had no effect on basic and pulsatile P4 secretion in CLs during 240 min of perfusion when compared to the control (P < 0.05). However, they inhibited LH-stimulated P4 secretion (P < 0.05). Phytoestrogens and their metabolites may disrupt CL function by inhibiting PG- and LH-stimulated P4 secretion.