Inflammation and Immune Evasion Coexist in Treponema Pallidum-infected Skin

Syphilis is a systemic, multistage, sexually transmitted infection caused by the highly invasive spirochetal bacterium, Treponema pallidum, subspecies pallidum. In the United States, the annual rate of primary and secondary syphilis (SS) between 2002 and 2016 has increased from 2.1 to 8.7 cases per 100,000.1 Gestational and congenital syphilis cases have also increased in the last few years. There is no evidence of a change in T pallidum susceptibility to penicillin as an explanation for the significant increase in the number of syphilis cases in the United States. It is more likely that changes in risk-taking behavior in the general population are responsible for this change. Although syphilis is easily treatable with penicillin, if left untreated up to one-third of syphilitic patients will go on to have the typical complications associated with tertiary syphilis. It is therefore critically important for clinicians to be well versed in the classic and not so classic dermatologic manifestations of the disease

Involvement of opioidergic system of the ventral hippocampus, the nucleus accumbens or the central amygdala in anxiety-related behavior

In the present study, the influence of opioidergic system of the ventral hippocampus, the nucleus accumbens or the central amygdala on anxiety-related behaviour was investigated in rats. As a model of anxiety, the elevated plus maze which is a useful test to investigate the effects of anxiogenic or anxiolytic drugs in rodents was used. Bilateral microinjection of different doses of morphine (2.5, 5 and 7.5 μg/rat) into the ventral hippocampus or the nucleus accumbens increased the percentage of open arm time (OAT) and open arm entries (OAE) but not locomotor activity, indicating an anxiolytic response. However, intra-central amygdala administration of the opioid did not show any response. On the other hand, microinjection of a dose of naloxone into the ventral hippocampus (2 μg/rat) or the nucleus accumbens (1 μg/rat) increased open arm time (OAT), but not open arm entry (OAE) which may indicate an anxiolytic effect. Pre-treatment administration of naloxone (0.5, 1 and 2 μg/rat) reversed the anxiolytic effect of morphine (7.5 μg/rat) injected into the ventral hippocampus in a dose-dependent manner. A dose of the antagonist (1 μg/rat) also reduced the morphine response (2.5 μg/rat) when injected in the nucleus accumbens. In conclusion, it seems that the opioidergic system in the ventral hippocampus and the nucleus accumbens are involved in anxiety-related behaviors and the ventral hippocampus may be the main site of action of the anxiolytic properties of morphine. © 2008 Elsevier Inc. All rights reserved

A Novel miR-451a isomiR, Associated with Amelanotypic Phenotype, Acts as a Tumor Suppressor in Melanoma by Retarding Cell Migration and Invasion

<div><p>miRNAs are key regulatory small non-coding RNAs involved in critical steps of melanoma tumorigenesis; however, the relationship between sequence specific variations at the 5′ or 3′ termini (isomiR) of a miRNA and cancer phenotype remains unclear. Deep-sequencing and qRT-PCR showed reduced expression of miR-144/451a cluster and most abundant isomiR (miR451a.1) in dysplastic nevi, in-situ and invasive melanomas compared to common nevi and normal skin (n = 101). miRNA in situ hybridization reproducibly confirmed lost miR-451a.1 in melanoma compared to nevus cells or adjacent keratinocytes. Significantly higher expression of miR-451a.1 was associated with amelanotic phenotype in melanomas (n = 47). In contrast, miR-451a was associated with melanotic phenotype, absent pagetoid scatter of intraepidermal melanocytes, superficial spreading histological subtype and tumor inflammation. Sequencing miRNAs from cultured melanocytes with cytoplasmic melanin gradient (light, medium to dark) showed absent miR-451a while revealing other melanin-associated miRNAs, e.g. miR-30b, miR-100 and miR-590 in darkly and let-7a, let-7i and let-7f in lightly to moderately pigmented cultured melanocytes. Ectopic expression of miR-144/451a in melanoma cell lines resulted in markedly higher levels of mature miR-451a.1 than miR451a or miR-144; and significantly retarded cell migration and inhibited invasion in a glucose-sensitive manner. Surprisingly, these effects were not mediated by calcium binding protein 39 (CAB39), a proven miR451a gene target. miR-144/miR-451a cluster is a novel miRNA locus with tumor suppressive activity in melanoma.</p></div

Menopause Age and the Associated Factors in Postmenopausal Women in Babol, Iran

BACKGROUND AND OBJECTIVE: Menopause plays a pivotal role in women&rsquo;s life comprising of approximately one third of it. Nevertheless, few studies have focused on the significance of this period. This study aimed to determine the age of menopause and its associated factors in postmenopausal women in Babol, Iran METHODS: This cross-sectional study was conducted by cluster sampling on 300 postmenopausal women identified by doorstep questioning of the homes in selected areas. The questionnaires consisted of information on the menopause age, body mass index (BMI), age at menarche, first pregnancy age, duration of hormonal contraceptive use, left-handedness, occupation, menstrual regularity, exercise, smoking habits, couple&rsquo;s education degree, marital status, family size and the number of births and abortions. The collected data were registered into checklists and The Holmes&nbsp;&&nbsp;Rahe Stress Scale was used for the assessment of the variables. FINDINGS: In total, the average age of menopause was 50.02&plusmn;0.21 years, the average length of marriage was 42.10&plusmn;0.63 years, age at last pregnancy was 35.15&plusmn;0.35 years and the lactation duration was 106.02&plusmn;3.5 months. A significant correlation was found between the length of marriage, age at last pregnancy, stress scores, lactation duration and the menopause age (p<0.001), while some factors such as BMI, regulation and age at menarche, duration of hormonal contraceptive use and exercise were found to have no significant correlations with the onset of menopause. CONCLUSION: According to the results of this study, the mean age of menopause in Babol is within the normal range and it is associated with the length of marriage, age at last pregnancy, stress scores and lactation duration

Expressing either miR-211 or miR-451a retarded migration and invasion of melanoma cells.

<p>(a) miR-211 or miR-451a significantly reduced the migration rate of WM983A cells after 48 h in normal glucose (4.5 g/L). (b) Lowering glucose (0.3 g/L) dramatically retarded migration rate of miR-451a or miR-144-transfected WM983A cells after 24 h; expressing both miR-144 and miR-451a together did not result in an added effect of retarded migration. (c) Moreover, expressing either miR-211 or miR-451a reduced the migration rate and (d) invasion of A375SM cells, respectively. (e) Cells transfected with miR-SCR nearly closed the gap by cross migration after 24 h whereas this process was retarded by miR-211 and miR-451a. The error bars represent standard deviation from at least two different independent experiments. *<i>P</i>-value<0.05; **<i>P</i>-value<0.005; ***<i>P</i>-value<0.0005.</p