Στην βιολογία, το περιβάλλον μπορεί να καθοριστεί σαν ενα σύνολο κλιματικών, βιοτικών, κοινωνικών και εδαφικών παραγόντων που δρουν σε έναν οργανισμό και καθορίζουν την ανάπτυξη και την επιβίωση του. Έτσι, περιλαμβάνει οτιδήποτε μπορεί να επηρεάσει άμεσα τον μεταβολισμό ή τη συμπεριφορά των ζωντανών οργανισμών ή ειδών, όπως το φως, ο αέρας, το νερό, το έδαφος και άλλοι παράγοντες. Δείτε επίσης το άρθρο για το φυσικό περιβάλλον και τη φυσική επιλογή.
Στην αρχιτεκτονική, την εργονομία και την ασφάλεια στην εργασία, περιβάλλον είναι το σύνολο των χαρακτηριστικών ενός δωματίου ή κτιρίου που επηρεάζουν την ποιότητα ζωής και την αποδοτικότητα, περιλαμβανομένων των διαστάσεων και της διαρρύθμισης των χώρων διαβίωσης και της επίπλωσης, του φωτισμού, του αερισμού, της θερμοκρασίας, του θορύβου κλπ. Επίσης μπορεί να αναφέρεται στο σύνολο των δομικών κατασκευών. Δείτε επίσης το άρθρο για το δομημένο περιβάλλον.
Στην ψυχολογία, περιβαλλοντισμός είναι η θεωρία ότι το περιβάλλον (με τη γενική και κοινωνική έννοια) παίζει μεγαλύτερο ρόλο από την κληρονομικότητα καθορίζοντας την ανάπτυξη ενός ατόμου. Συγκεκριμένα, το περιβάλλον είναι ένας σημαντικός παράγοντας πολλών ψυχολογικών θεωριών.
Στην τέχνη, το περιβάλλον αποτελεί κινητήριο μοχλό και μούσα εμπνέοντας τους ζωγράφους ή τους ποιητές. Σε όλες τις μορφές της Τέχνης αποτελεί έμπνευση και οι Καλές Τέχνες φανερώνουν την επιρροή οπού άσκησε σε όλους τους καλλιτέχνες με όποιο είδος Τέχνης κι αν ασχολούνται. Ο άνθρωπος μέσα στο περιβάλλον δημιουργεί Μουσική, Ζωγραφική, Ποίηση, Γλυπτική, χορό, τραγούδι, θέατρο, αλλά και όλες οι μορφές τέχνης έχουν άμεση έμπνευση από το περιβάλλον.

Κυριακή 19 Φεβρουαρίου 2023

Multifunctional Two-Dimensional Bi2Se3 Nanodiscs for Anti-Inflammatory Therapy of Inflammatory Bowel Diseases

AlexandrosSfakianakis shared this article with you from Inoreader

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Publication date: Available online 17 February 2023

Source: Acta Biomaterialia

Author(s): Cong Zhang, Qingrong Li, Jie Shan, Jianghao Xing, Xiaoyan Liu, Yan Ma, Haisheng Qian, Xulin Chen, Xianwen Wang, Lian-Ming Wu, Yue Yu

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Downregulation of miR‐193a/b‐3p during HPV‐induced cervical carcinogenesis contributes to anchorage‐independent growth through PI3K/AKT pathway regulators

AlexandrosSfakianakis shared this article with you from Inoreader

Abstract

Cervical cancer is caused by a persistent infection with high-risk types of HPV and an accumulation of (epi)genetic alterations in host cell. Acquisition of anchorage-independent growth represents a critical hallmark during HPV-induced carcinogenesis, thereby yielding the most valuable biomarkers for early diagnosis and therapeutic targets. In a previous study, we found that miR-193a-3p and miR-193b-3p were involved in anchorage-independent growth. This study aimed to delineate the role of miR-193a/b-3p in HPV-induced carcinogenesis and to identify their target genes related to anchorage-independent growth. Cell viability and colony formation were assessed in SiHa cancer cells and HPV-16 and -18 immortalized keratinocytes upon miR-193a/b-3p overexpression. Both miRNAs reduced cell growth of all three cell lines in low-attachment conditions and showed a minor effect in adherent conditions. Online target predicting programs and publicly available expression data were used to find ca ndidate mRNAs targets of miR-193a/b-3p. Seven targets showed reduced mRNA expression upon miR-193a/b-3p overexpression. For 3 targets Western blot analysis was also performed, all showing a reduced protein expression. A direct interaction was confirmed using luciferase assays for 6 genes: LAMC1, PTK2, STMN1, KRAS, SOS2, and PPP2R5C, which are PIK3/AKT regulators. All 6 targets were overexpressed in cervical cancers and/or precursor lesions. Together with an oberserved downregulation of phosphorylated-AKT upon miR-193a/b-3p overexpression, this underlines the biological relevance of miR-193a/b-3p downregulation during HPV-induced cervical carcinogenesis.

In conclusion, downregulation of miR-193a-3p and miR-193b-3p is functionally involved in the acquisition of HPV-induced anchorage independence by targeting regulators of the PIK3/AKT pathway.

This article is protected by copyright. All rights reserved.

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Xenogeneic collagen matrix versus connective tissue graft for soft tissue augmentation at immediately placed implants: a prospective clinical trial

AlexandrosSfakianakis shared this article with you from Inoreader
The advantages of immediate implant placement for patients include a reduced number of surgical procedures and a shorter overall treatment time. Disadvantages include a higher risk of aesthetic complications. The aim of this study was to compare xenogeneic collagen matrix (XCM) versus a subepithelial connective tissue graft (SCTG) used for soft tissue augmentation in combination with immediate implant placement without provisionalization. Forty-eight patients requiring a single implant-supported rehabilitation were selected and assigned to one of two surgical procedures: immediate implant with SCTG (SCTG group) or immediate implant with XCM (XCM group). (Source: International Journal of Oral and Maxillofacial Surgery)
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Recombinant measles virus encoding the spike protein of SARS-CoV-2 efficiently induces Th1 responses and neutralizing antibodies that block SARS-CoV-2 variants

AlexandrosSfakianakis shared this article with you from Inoreader
via Vaccine

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In this study, we developed a recombinant MeV expressing the full-length SARS-CoV-2 spike protein (rMeV-S) and tested its efficacy using mouse and hamster models. In hCD46Tg mice, two-dose rMeV-S vaccination induced higher Th1 secretion and humoral responses than one-dose vaccination. Interestingly, neutralizing antibodies induced by one-dose and two-dose rMeV-S immunization effectively blocked the entry of the α, β, γ, and δ variants of SARS-CoV-2. Furthermore, two-dose rMeV-S immunization provided complete protection against SARS-CoV-2 in the hamster model. These results suggest the potential of rMeV-S as a vaccine candidate for targeting SARS-CoV-2 and its variants.PMID:3679 2434 | DOI:10.1016/j.vaccine.2023.02.005 (Source: Vaccine)
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Characterization of protein-based risk signature to predict prognosis and evaluate the tumor immune environment in breast cancer

AlexandrosSfakianakis shared this article with you from Inoreader
CONCLUSION: This study established an effective prognostic proteomics signature with reliable predictive performance for survival, immune activity, and drug sensitivity. It might provide a novel perspective into the protein function in BC, and guide the individual treatment strategies for BC patients.PMID:36732487 | DOI:10.1007/s12282-023-01435-8 (Source: Breast Cancer)
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Acute Posterior Multifocal Placoid Pigment Epitheliopathy: A Rare Presentation of Anklylosing Spondylitis or a Paradoxical Reaction to Secukinumab?

AlexandrosSfakianakis shared this article with you from Inoreader
CONCLUSION: In AS patients, posterior uveitis can manifest as APMPPE. It should be recorded as an entity to be considered in the differential diagnosis.PMID:36608284 | DOI:10.1080/09273948.2022.2150225 (Source: Ocular Immunology and Inflammation)
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Πέμπτη 16 Φεβρουαρίου 2023

Autophagy and its role in osteosarcoma

AlexandrosSfakianakis shared this article with you from Inoreader
Autophagy and its role in osteosarcoma

In this review, we summarized the role of autophagy in OS proliferation, metastasis, chemotherapy, radiotherapy, and immunotherapy. And we think that autophagy-related genes and pathways could serve as potential targets for OS therapy.


Abstract

Osteosarcoma (OS) is the most common bone malignancy and preferably occurs in children and adolescents. Despite significant advances in surgery and chemotherapy for OS over the past few years, overall survival rates of OS have reached a bottleneck. Thus, extensive researches aimed at developing new therapeutic targets for OS are urgently needed. Autophagy, a conserved process which allows cells to recycle altered or unused organelles and cellular components, has been proven to play a critical role in multiple biological processes in OS. In this article, we summarized the association between autophagy and proliferation, metastasis, chemotherapy, radiotherapy, and immunotherapy of OS, revealing that autophagy-related genes and pathways could serve as potential targets for OS therapy.

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