Nicolau syndrome following intramuscular penicillin injection

Nicolau Syndrome (NS) is a rare but severe localized adverse reaction at the site of intramuscular drug injection. The typical presentation is intense pain around the injection site soon after injection, followed by erythema, purplish network discolouration of the skin, haemorrhagic patch, and finally tissue necrosis. Here in, we report a 9 years old boy, the third Nicolau Syndrome (NS) reported from Iran after a single intramuscular injection of penicillin.     

Omentin-1, visfatin and adiponectin levels in relation to bone mineral density in Iranian postmenopausal women

The bone and fat interface is implicated in the pathogenesis of postmenopausal osteoporosis. The association between circulating omentin-1 levels and bone mineral density (BMD) in postmenopausal women has never been assessed. A total of 382 healthy postmenopausal women were randomly selected. Omentin-1, visfatin, adiponectin, the receptor activator of nuclear factor-κB ligand (RANKL), osteoprotegerin, high sensitivity C-reactive protein, degradation products of C-terminal telopeptides of type I collagen, and osteocalcin were measured by highly specific enzyme-linked immunosorbent assay methods. BMD was determined for the lumbar spine (L2-L4) and the proximal femur using dual-energy X-ray absorptiometry. In multivariable-adjusted linear regression, serum omentin-1 levels were inversely correlated with BMD at the lumbar spine (β=-0.11, p=0.020). In multiple regression analyses, serum visfatin and adiponectin levels were not significantly correlated with BMD at different skeletal sites after controlling for age, body mass index, and bone-related markers. However, the highest quartile of adiponectin compared to the lowest quartile, after adjusting for potential confounders, revealed an inverse association with BMD in the lumbar spine (β=-0.19, p=0.010). In conclusion, circulating omentin-1 levels had an inverse correlation with BMD at the lumbar spine in Iranian postmenopausal women. To further understand the role of omentin-1 in bone and mineral metabolism, large-scale longitudinal studies focusing on BMD and osteoporotic fractures are warranted.     

Cannabidiol is a negative allosteric modulator of the cannabinoid CB1 receptor

Background and Purpose

Cannabidiol has been reported to act as an antagonist at cannabinoid CB₁ receptors. We hypothesized that cannabidiol would inhibit cannabinoid agonist activity through negative allosteric modulation of CB₁ receptors.

Experimental Approach

Internalization of CB₁ receptors, arrestin2 recruitment, and PLCβ3 and ERK1/2 phosphorylation, were quantified in HEK 293A cells heterologously expressing CB₁ receptors and in the STHdh ^Q7/Q7 cell model of striatal neurons endogenously expressing CB₁ receptors. Cells were treated with 2‐arachidonylglycerol or Δ⁹‐tetrahydrocannabinol alone and in combination with different concentrations of cannabidiol.

Key Results

Cannabidiol reduced the efficacy and potency of 2‐arachidonylglycerol and Δ⁹‐tetrahydrocannabinol on PLCβ3‐ and ERK1/2‐dependent signalling in cells heterologously (HEK 293A) or endogenously (STHdh ^Q7/Q7) expressing CB₁ receptors. By reducing arrestin2 recruitment to CB₁ receptors, cannabidiol treatment prevented internalization of these receptors. The allosteric activity of cannabidiol depended upon polar residues being present at positions 98 and 107 in the extracellular amino terminus of the CB₁ receptor.

Conclusions and Implications

Cannabidiol behaved as a non‐competitive negative allosteric modulator of CB₁ receptors. Allosteric modulation, in conjunction with effects not mediated by CB₁ receptors, may explain the in vivo effects of cannabidiol. Allosteric modulators of CB₁ receptors have the potential to treat CNS and peripheral disorders while avoiding the adverse effects associated with orthosteric agonism or antagonism of these receptors.

Abbreviations

2‐AG

2‐arachidonyl glycerol

BRET_Eff

BRET efficiency

CBD

cannabidiol

FAAH

fatty acid amide hydrolase

NAM

negative allosteric modulator

THC

Δ⁹‐tetrahydrocannabinol

     

Prevalence of intimate partner violence and reproductive health outcomes among Afghan refugee women in Iran

Refugee women are at high risk of experiencing high level of Intimate Partner Violence (IPV) and its negative impacts. We conducted a cross-sectional population-based household survey with refugees in a settlement in the city of Semnan, Iran, from 2016 to 2017. Afghan refugee women (n?=?188) with ages between 15 and 49?years were recruited for the survey. Overall, about 79.8% of the participants reported to have experienced a form of IPV in the past 12?months. IPV exposure is associated with a negative reproductive health outcome. The high prevalence of IPV found among refugee women in the present research and its strong links with poor reproductive health outcomes, underline the urgent need for the development and testing of appropriate interventions in refugee settlements.     

Flixweed vs. Polyethylene Glycol in the Treatment of Childhood Functional Constipation: A Randomized Clinical Trial

Background:

Polyethylene glycol (PEG) is often considered as the first-line treatment for functional constipation in children. Descurainia sophia (L.) Webb et Berth (D. sophia) is a safe recommended medicine in Iranian folk and Traditional Persian Medicine for the treatment of constipation.

Objectives:

To clinically compare D. sophia with PEG 4000 (without electrolyte) in pediatric constipation and to assess its efficacy and side effects.

Patients and Methods:

120 patients aged 2 - 12 years with constipation for at least 3 months were included in an 8 weeks lasting randomized controlled trial within two parallel-groups. Children received either PEG, 0.4 g/kg/day, or D. sophia seeds, 2 grams (for children aged 2 - 4 years) and 3 grams (for those aged > 4 years) per day.

Results:

A total of 109 patients completed the study (56 in D. sophia and 53 in PEG group). At the end of the study, 36 (64.3%) patients in D. sophia group and 29 (54.7%) in PEG group were out of Rome III criteria (P = 0.205). Median weekly stool frequency in 0, 1, 2, 3 weeks of the treatment was found to be 2, 5, 5, 5 in D. sophia and 3, 4, 4, 5 in PEG group (P = 0.139, 0.076, 0.844, 0.294), respectively. The number of patients who suffered flatulence was less (5, 8.9%) in D. sophia group as compared to PEG group (6, 11.3%) at the end of the trial (P = 0.461). D. sophia taste was less tolerated.

Conclusions:

D. sophia is introduced as a cheap and available medication which can be applied as a safe alternative to conventional PEG in the management of pediatric chronic functional constipation.     

Molecular survey of ITS1 spacer and Rickettsia infection in human flea,Pulex irritans

Parasitology Research - The human flea is an important ectoparasite causing serious public health problems worldwide. Planning and monitoring the control programs against this vector require the...     

Estimation of effective brain connectivity with dual Kalman filter and EEG source localization methods

Effective connectivity is one of the most important considerations in brain functional mapping via EEG. It demonstrates the effects of a particular active brain region on others. In this paper, a new method is proposed which is based on dual Kalman filter. In this method, firstly by using a brain active localization method (standardized low resolution brain electromagnetic tomography) and applying it to EEG signal, active regions are extracted, and appropriate time model (multivariate autoregressive model) is fitted to extracted brain active sources for evaluating the activity and time dependence between sources. Then, dual Kalman filter is used to estimate model parameters or effective connectivity between active regions. The advantage of this method is the estimation of different brain parts activity simultaneously with the calculation of effective connectivity between active regions. By combining dual Kalman filter with brain source localization methods, in addition to the connectivity estimation between parts, source activity is updated during the time. The proposed method performance has been evaluated firstly by applying it to simulated EEG signals with interacting connectivity simulation between active parts. Noisy simulated signals with different signal to noise ratios are used for evaluating method sensitivity to noise and comparing proposed method performance with other methods. Then the method is applied to real signals and the estimation error during a sweeping window is calculated. By comparing proposed method results in different simulation (simulated and real signals), proposed method gives acceptable results with least mean square error in noisy or real conditions.