Hydrophobicity-responsive engineered mesoporous silica nanoparticles: application in the delivery of essential nutrients to bacteria combating oil spills.

Facile chemical modification of mesoporous silica particles allows the production of gated reservoir systems capable of hydrophobicity-triggered release. Applied to the delivery of nutrients specifically to an oil phase, the systems developed have been shown to reliably assist the bacterial degradation of hydrocarbons. The gated system developed, made of C18 hydrocarbon chains, is demonstrated to be in a closed collapsed state in an aqueous environment, yet opens up through solvation by lipophilic alkanes and releases its content on contact with the oil phase.

A Systematic Review of Sexuality and Depression of Cervical Cancer Patients.

Objectives: The goal of this article is to investigate the correlation between sexuality and depression of cervical cancer (CC) patients. Methods: A bibliographical search was carried out in the databases CINAHL, PubMed, and Cochrane Library with the following terms in English for the years 2006 to 2017: sexuality, sexual function, sexual dysfunction, sexual problems, mood, depression, emotional distress, cervical cancer. Results: Fourteen studies were included. They present heterogeneity in the stage of the disease, the selected treatments, and their sample. From the studies, only 7 are evaluated as good methodologically. Sexual dysfunction and depression of CC patients persist for many years after treatments. The younger women, those who underwent radiotherapy, and those who had chronic fatigue, as an aftereffect of treatments, had increased depression. Women that underwent surgery and adjuvant therapy experienced the highest rates of depressive symptoms. There is a positive relationship between sexuality and depression in patients with CC. Conclusions: Sexuality and depression οf women with CC are affected by their therapies to a significant extent. There is a positive correlation between the two variables. The existing methodologically good studies are scarce, and for this reason the results cannot be generalized in all CC patients.

Towards Elucidating Carnosic Acid Biosynthesis in Lamiaceae: Functional Characterization of the Three First Steps of the Pathway in Salvia fruticosa and Rosmarinus officinalis.

Carnosic acid (CA) is a phenolic diterpene with anti-tumour, anti-diabetic, antibacterial and neuroprotective properties that is produced by a number of species from several genera of the Lamiaceae family, including Salvia fruticosa (Cretan sage) and Rosmarinus officinalis (Rosemary). To elucidate CA biosynthesis, glandular trichome transcriptome data of S. fruticosa were mined for terpene synthase genes. Two putative diterpene synthase genes, namely SfCPS and SfKSL, showing similarities to copalyl diphosphate synthase and kaurene synthase-like genes, respectively, were isolated and functionally characterized. Recombinant expression in Escherichia coli followed by in vitro enzyme activity assays confirmed that SfCPS is a copalyl diphosphate synthase. Coupling of SfCPS with SfKSL, both in vitro and in yeast, resulted in the synthesis miltiradiene, as confirmed by 1D and 2D NMR analyses (1H, 13C, DEPT, COSY H-H, HMQC and HMBC). Coupled transient in vivo assays of SfCPS and SfKSL in Nicotiana benthamiana further confirmed production of miltiradiene in planta. To elucidate the subsequent biosynthetic step, RNA-Seq data of S. fruticosa and R. officinalis were searched for cytochrome P450 (CYP) encoding genes potentially involved in the synthesis of the first phenolic compound in the CA pathway, ferruginol. Three candidate genes were selected, SfFS, RoFS1 and RoFS2. Using yeast and N. benthamiana expression systems, all three where confirmed to be coding for ferruginol synthases, thus revealing the enzymatic activities responsible for the first three steps leading to CA in two Lamiaceae genera.