Erichsenpark3459
Endocrine disrupting chemicals (EDCs) are found in plastics, personal care products, household items, and other consumer goods. Risk assessments are intended to characterize a chemical's hazards, identify the doses at which adverse outcomes are observed, quantify exposure levels, and then compare these doses to determine the likelihood of risk in a given population. There are many problems with risk assessments for EDCs, allowing people to be exposed to levels that are later associated with serious health outcomes in epidemiology studies.
In this review, we examine issues that affect the evaluation of EDCs in risk assessments (e.g., use of insensitive rodent strains and absence of disease-oriented outcomes in hazard assessments; inadequate exposure assessments). We then review one well-studied chemical, Bisphenol A (BPA; CAS #80-05-7) an EDC found in plastics, food packaging, and other consumer products. More than one hundred epidemiology studies suggest associations between BPA exposures and adverse healand other EDCs.
Phencyclidine (PCP, I) and its substituted analogs are significant and broadly abused psychotomimetic drugs that affect the central nervous system. They show many pharmacological properties due to the presence of specific receptors in the brain.
Methyl group, despite strong electron-donating and characters of dipole moments, were placed on various positions of phenyl and amine moieties of Phencyclidine along with the substitution of benzylamine, piperazine, and aniline derivatives in place of piperidine ring of Phencyclidine to create novel compounds of the core with analgesic properties.
For evaluation of the Analgesic activities of newly synthesized compounds, they were screened by tests of tail immersion (thermal) and formalin (chemical) pains. The obtained data with the control and PCP groups were compared too.
The outcomes indicated that some new compounds have more antinociceptive effects than PCP in tail immersion and formalin tests. In the tail immersion test, the methyl piperazine analog (III) shows more efficacy than others. In the formalin test, none of the compounds are as effective as phencyclidine at the earliest time-point, but compounds IV and V do show more effective during the second stage of formalin pain.
It can be concluded that the methyl-piperazine analog of phencyclidine was the best candidate to decrease acute thermal and benzylamine derivatives were suitable candidates to reduce chemical pains.
It can be concluded that the methyl-piperazine analog of phencyclidine was the best candidate to decrease acute thermal and benzylamine derivatives were suitable candidates to reduce chemical pains.
The Gochnatia decora (Kurz) A. L. Cabrera is a rare woody plant belonging to the family of Asteraceae. The bark of this plant is used in Chinese folk medicine to treat cough and pneumonia. However, the effective substance related to its efficacy remains unknown. This study aims to evaluate the potential anti-inflammatory activities of the chemicals isolated from this plant using a model of LPS-induced RAW264.7 cells.
Chemical constituents were isolated from the stems and leaves of G. decora by a series of chromatographic separation methods and identified by spectral analysis techniques. The model of inflammation in vitro was established by treatment of 1 µM LPS on RAW264.7 cells. The influence of tested compounds on inflammatory factor production, including NO, TNF-α, IL-1β, IL-6, IL-17, were determined by ELISA. The mechanisms involved were studied by western blot analysis.
Two known ent-kaurane diterpenes (1 and 2), identified as ent-17-hydroxy-15-oxokauran-19-oic acid (1) and ent-15α-hydroxy-16-kauran-19-oic acid (2), were isolated from the stems and leaves of G. decora. The bioassay showed both of them produced significant inhibition of LPS-induced release of NO, TNF-α, IL-1β, IL-6, IL-17, iNOS, and COX-2 expression. Western blot analysis showed that these same 2 chemicals blocked LPS-induced phosphorylation of NF-κB.
Compounds 1 and 2 were obtained from the genus Gochnatia. These compounds demonstrated useful anti-inflammatory activities in the model of LPS-induced RAW264.7 cells. A potential action mechanism may be correlation of the NF-κB pathway.
Compounds 1 and 2 were obtained from the genus Gochnatia. These compounds demonstrated useful anti-inflammatory activities in the model of LPS-induced RAW264.7 cells. A potential action mechanism may be correlation of the NF-κB pathway.
A high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of hypaphorine, a potential agent for treating osteoclast-based bone loss, was developed and valadated in rat plasma.
Plasma samples were pretreated by the protein precipitation. Chromatographic separation was performed using an Inertsil ODS-3 column (50 mm × 4.6 mm, 5 μm). The mobile phase consisted of water (containing 0.1% formic acid) and acetonitrile in a gradient mode at a flow rate of 0.5 mL/min. The acquisition was carried out in selected reaction monitoring (SRM) of the transitions from protonated precursor ion [M + H]+ to the particular daughter ion and the mass transitions of hypaphorine and IS were 247 → 188 and m/z 219 → 188, respectively. The method was validated in terms of selectivity, linearity, accuracy and precision, extraction recovery and matrix effect, stability and carryover.
It showed good linearity over the range of 1-2000 ng/mL (R2 = 0.9978). The intra-batch accuracy was within 93.95-105.81% and the precision was within 4.92-11.53%. The inter-batch accuracy was within 96.18-100.39% with a precision of 6.22-11.23%. The extraction recovery and matrix factors were acceptable.
The simple and rapid method was successfully applied to the pharmacokinetics study in rats following oral administration of hypaphorine at the doses of 0.5, 1.5, and 4.5 mg/kg.
The simple and rapid method was successfully applied to the pharmacokinetics study in rats following oral administration of hypaphorine at the doses of 0.5, 1.5, and 4.5 mg/kg.We identify the core services included in a community hub model of care to improve the understanding of this model for health system leaders, decision-makers in community-based organizations, and primary healthcare clinicians. We searched Medline, PubMed, CINAHL, Scopus, Web of Science, and Google from 2000 to 2020 to synthesize original research on community hubs. Eighteen sources were assessed for quality and narratively synthesized (n = 18). Our analysis found 4 streams related to the service delivery in a community hub model of care (1) Chronic disease management; (2) mental health and addictions; (3) family and reproductive health; and (4) seniors. The specific services within these streams were dependent upon the needs of the community, as a community hub model of care responds and adapts to evolving needs. Our findings inform the work of health leaders tasked with implementing system-level transformations towards community-informed models of care.Respiratory monitoring, using impedance with implanted telemetry in socially housed animals, was not possible until the recent development of digital signal transmission. The objective of this study was to evaluate digital telemetry monitoring of cardiopulmonary parameters (respiratory rate, tidal volume, minute volume, electrocardiography (DII), systemic arterial blood pressure, physical activity, and body temperature) in conscious, single-housed, non-rodent species commonly used in toxicology studies following administration of positive/negative controls (saline, dexmedetomidine, morphine, amphetamine, and doxapram), and also, the effects of various social housing arrangements in untreated female and/or male cynomolgus monkeys, Beagle dogs, and Göttingen minipigs (n = 4 per species). Aggressions were observed in socially housed male minipigs, however, which prevented pair-housed assessments in this species. All tested pharmacological agents significantly altered more than one organ system, highlighting important inter-organ dependencies when analyzing functional endpoints. Stress-related physiological changes were observed with single-housing or pair-housing with a new cage mate in cynomolgus monkeys and Beagle dogs, suggesting that stable social structures are preferable to limit variability, especially around dosing. Concomitant monitoring of cardiovascular and respiratory parameters from the same animals may help reduce the number of animals (3 Rs) needed to fulfill the S7A guidelines and allows for identification of organ system functional correlations. Globally, the data support the use of social housing in non-rodents for safety pharmacology multi-organ system (heart and lungs) monitoring investigations.The rate of value decadence and degeneration of moral value as it applies to work ethic amongst teachers is worrisome, especially in Nigeria. This value decadence amongst Nigerian teachers could have been triggered off as a result of their false perceptions in placing demands. This study therefore investigated the effect of rational emotive occupational intervention on the perceptions of work value and ethical practices amongst teachers in primary schools in Nigeria. Randomized group control intervention was adopted with 168 primary school teachers selected as participants for this study. selleck chemical The participants were allocated to (treatment group n = 84) and (waitlisted control group n = 84). The participants in the treatment group received a 12-week program of activities (REBOI) whereas the waitlisted group received the conventional means of counseling. The results showed that rational emotive behavioural occupational intervention was significant in the work values of primary school teachers in Nigeria as measured by the Organizational Values Scale . Rational emotive occupational intervention was significant in the ethical sensitivity of primary school teachers in Nigeria as measured by the Ethical Sensitivity Scale. It was also found that rational emotive behavioral occupational intervention has significant long-term effects on work value and ethical practices among primary school teachers in Nigeria as measured by the Organizational Values Scale, Ethical Sensitivity Scale. Therefore, we conclude that rational emotive behavioral occupational intervention is effective in changing the false perceptions of work value and ethical practices among primary school teachers in Nigeria.
Diabetes is a serious global health concern which severely affected public health as well as socio-economic growth worldwide. Scutellarin (SCU), a bioactive flavonoid, is known for its efficacious action against a range of ailments including cardiovascular problems. The present study was conducted to find out possible protective effect and its associated mechanisms of SCU on experimental type 2 diabetes-induced cardiac injury.
Type 2 diabetes was induced by treating animals with high fat diet for 4 weeks and a single intraperitoneal dose (35mg/kg body weight) of streptozotocin and diabetic animals received SCU (10 or 20mg/kg/day) for 6 weeks.
Scutellarin attenuated type 2 diabetes-induced hyperglycemia, bodyweight loss, hyperlipidaemia, cardiac functional damage with histopathological alterations and fibrosis. Scutellarin treatment to type 2 diabetic mice ameliorated oxidative stress, inflammatory status and apoptosis in heart. Furthermore, the underlying mechanisms for such mitigation of oxidative stress, inflammation and apoptosis in heart involved modulation of Nrf2/Keap1 pathway, TLR4/MyD88/NF-κB mediated inflammatory pathway and intrinsic (mitochondrial) apoptosis pathway, respectively.
