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The human oral microbiota is highly diverse and has a complex ecology, comprising bacteria, microeukaryotes, archaea and viruses. These communities have elaborate and highly structured biogeography that shapes metabolic exchange on a local scale and results from the diverse microenvironments present in the oral cavity. The oral microbiota also interfaces with the immune system of the human host and has an important role in not only the health of the oral cavity but also systemic health. In this Review, we highlight recent advances including novel insights into the biogeography of several oral niches at the species level, as well as the ecological role of candidate phyla radiation bacteria and non-bacterial members of the oral microbiome. In addition, we summarize the relationship between the oral microbiota and the pathology of oral diseases and systemic diseases. Together, these advances move the field towards a more holistic understanding of the oral microbiota and its role in health, which in turn opens the door to the study of novel preventive and therapeutic strategies.In this Review, He and co-workers explore the structure and diversity of the oral microbiota, and they discuss the role of the oral microbiota in the pathology of both oral and systemic diseases.

هذا الكتاب ما هو الا عبارة عن مقدمة في التربية الخاصة حول الاطفال والمراهقين المضطربين سلوكيا وانفعاليا ولكون الاضطرابات السلوكية والانفعالية يمكن ملاحظتها بشكل مستمر في سلوكات الاطفال والمراهقين في جميع تصنيفات ويمكن أن يكون ذا قيمم في المواد التي تتناول خصائص الاشخاص المعاقين عقليا أو صعوبات التعلم أو علم النفس التربوي أو علم النفس الشواذ الاطفال وهذا الكتاب مفيد ويحتوي الكتاب على ست حالات جديدة مقدماتها واسئالتها مما يساعد على ممارسة أعمق في تطبيق المعرفة في حالات حقيقية مع الاطفال والمراهقين وتعتبر هذا الفئة في التربية الخاصة من أكثر الفئات تجاهلا في المجتمعات الانسانية وأكثر تعرضا للغبن هي فئة الاشخاص المعاقين سلوكيا وانفعاليا.

Microbial communities are shaped by viral predators. Yet, resolving which viruses (phages) and bacteria are interacting is a major challenge in the context of natural levels of microbial diversity. Thus, fundamental features of how phage-bacteria interactions are structured and evolve in the wild remain poorly resolved. Here we use large-scale isolation of environmental marine Vibrio bacteria and their phages to obtain estimates of strain-level phage predator loads, and use all-by-all host range assays to discover how phage and host genomic diversity shape interactions. We show that lytic interactions in environmental interaction networks (as observed in agar overlay) are sparse—with phage predator loads being low for most bacterial strains, and phages being host-strain-specific. Paradoxically, we also find that although overlap in killing is generally rare between tailed phages, recombination is common. Together, these results suggest that recombination during cryptic co-infections is an important mode of phage evolution in microbial communities. In the development of phages for bioengineering and therapeutics it is important to consider that nucleic acids of introduced phages may spread into local phage populations through recombination, and that the likelihood of transfer is not predictable based on lytic host range. Understanding the interactions between bacteria and their viruses (phages) in natural communities is a major challenge. Here, the authors isolate and study large numbers of marine Vibrio bacteria and their phages, and find that lytic interactions are sparse and many phages are host-strain-specific, but nevertheless recombination between some phages is common.

هذا الكتاب يعد من أفضل الكتب في موضوعه والمتعلق في فئات ذوو الحاجات الخاصة فقد تم ترجمته مع قبل مختصين في مجالهم ومنفردين في تخصصاتهم الدقيقة ليعطي كل فرد منهم الفصل المتعلق به لتكون الترجمة دقيقة ومتخصصة وهذا الكتاب يساعد المعلمين والطلاب في التربية الخاصة والشمرفين والشمرفات والاباء والامهات في فهم هؤلاء ذوو الحاجات الخاصة حسب فئاتهم المختلفة وعمل البرامج الخاصة وبهم ومساعدتعم على الدخول الى المجتمع ويزود الكتاب المادة العلمية الرصينة بأسس علمية وتولد لديهم اتجاهات ايجابية وصحية نحو عملهم في خدمة فئات الطلبة فهذا الكتاب يستخدم أحدث واطور المصطلحات العلمية وأحدث الدرسات العالمية بهذا المجال التربية الخاصة ليكون مواكب للعصر والتطورات الحديثة في التربية الخاصة.

Inclusive education has developed worldwide popularity in education for learners with various disabilities but is particularly controversial for students with intellectual disabilities because of their unique needs. The foremost of these are the development of the social, vocational and life skills needed to facilitate their transition to adulthood. This article presents a discussion that focuses on theory, practice and research relevant to inclusive education for students with intellectual disabilities. It points out that the movement for full inclusion started by focusing on students with intellectual disabilities and has encountered roadblocks to further progress because of its difficulties in addressing their special needs. This is explored by considering the theory underpinning the international drivers of the full inclusion movement, the reality of the implementation of inclusion policies worldwide, and research on the effects of inclusion of students with intellectual disabilities in mainstream schools.

Members of a family of marine dsDNA non-tailed bacterial viruses have short, 10-kb genomes, infect a broader range of hosts than tailed viruses and belong to the double jelly roll capsid lineage of viruses, which are associated with diverse bacterial and archaeal hosts. Microbial predator found in the ocean Double-stranded DNA (dsDNA) viruses comprise both tailed and non-tailed viruses and are thought to be the most abundant viruses on Earth. Tailed viruses of the Caudovirales dominate sequence and culture collections, whereas non-tailed dsDNA viruses often dominate ocean samples but remain largely uncharacterized. Martin Polz and colleagues describe a family of diverse marine non-tailed viruses, called the Autolykiviridae . Through metagenomics and phylogenetic analyses, the team show that Autolykiviridae represent an ancient lineage of double jelly roll capsid viruses. They also show that these viruses are abundant in the ocean, where they prey on marine bacteria and archaea. This finding was facilitated by updated methods for environmental viral discovery, and represents an important step forwards in our understanding of environmental bacteria–virus interactions. The most abundant viruses on Earth are thought to be double-stranded DNA (dsDNA) viruses that infect bacteria 1 . However, tailed bacterial dsDNA viruses ( Caudovirales ), which dominate sequence and culture collections, are not representative of the environmental diversity of viruses 2 , 3 . In fact, non-tailed viruses often dominate ocean samples numerically 4 , raising the fundamental question of the nature of these viruses. Here we characterize a group of marine dsDNA non-tailed viruses with short 10-kb genomes isolated during a study that quantified the diversity of viruses infecting Vibrionaceae bacteria. These viruses, which we propose to name the Autolykiviridae , represent a novel family within the ancient lineage of double jelly roll (DJR) capsid viruses. Ecologically, members of the Autolykiviridae have a broad host range, killing on average 34 hosts in four Vibrio species, in contrast to tailed viruses which kill on average only two hosts in one species. Biochemical and physical characterization of autolykiviruses reveals multiple virion features that cause systematic loss of DJR viruses in sequencing and culture-based studies, and we describe simple procedural adjustments to recover them. We identify DJR viruses in the genomes of diverse major bacterial and archaeal phyla, and in marine water column and sediment metagenomes, and find that their diversity greatly exceeds the diversity that is currently captured by the three recognized families of such viruses. Overall, these data suggest that viruses of the non-tailed dsDNA DJR lineage are important but often overlooked predators of bacteria and archaea that impose fundamentally different predation and gene transfer regimes on microbial systems than on tailed viruses, which form the basis of all environmental models of bacteria–virus interactions.

The key nuclear export protein CRM1/XPO1 may represent a promising novel therapeutic target in human multiple myeloma (MM). Here we showed that chromosome region maintenance 1 (CRM1) is highly expressed in patients with MM, plasma cell leukemia cells and increased in patient cells resistant to bortezomib treatment. CRM1 expression also correlates with increased lytic bone and shorter survival. Importantly, CRM1 knockdown inhibits MM cell viability. Novel, oral, irreversible selective inhibitors of nuclear export (SINEs) targeting CRM1 (KPT-185, KPT-330) induce cytotoxicity against MM cells (ED 50 <200 n M ), alone and cocultured with bone marrow stromal cells (BMSCs) or osteoclasts (OC). SINEs trigger nuclear accumulation of multiple CRM1 cargo tumor suppressor proteins followed by growth arrest and apoptosis in MM cells. They further block c-myc, Mcl-1, and nuclear factor κB (NF-κB) activity. SINEs induce proteasome-dependent CRM1 protein degradation; concurrently, they upregulate CRM1, p53-targeted, apoptosis-related, anti-inflammatory and stress-related gene transcripts in MM cells. In SCID mice with diffuse human MM bone lesions, SINEs show strong anti-MM activity, inhibit MM-induced bone lysis and prolong survival. Moreover, SINEs directly impair osteoclastogenesis and bone resorption via blockade of RANKL-induced NF-κB and NFATc1, with minimal impact on osteoblasts and BMSCs. These results support clinical development of SINE CRM1 antagonists to improve patient outcome in MM.

Verrucae plantaris (plantar warts) are common cutaneous lesions of the plantar aspect of the foot that are caused by the human papillomavirus (HPV). Ubiquitous in our environment, asymptomatic infection with HPV occurs frequently, with most infections controlled or cleared by cellular and humoral immune responses. However, certain populations have been observed to manifest plantar warts at higher rates compared with the general population, placing them at increased risk for wart-induced pain and complications. Plantar warts shed HPV, which can then infect other sites in the plantar region or spread to other people. Although controlling risk factors is useful in preventing infection, the pervasive nature of HPV makes these preventive measures frequently impractical. This literature review outlines the current knowledge regarding the relationship between plantar wart pathophysiology, HPV transmission, and epidemiologic characteristics. Given the high propensity for treatment resistance of plantar warts and no established, practical, and reliable method of prevention, HPV prophylaxis for populations that demonstrate high rates of plantar warts may be of benefit in controlling the spread of lesions.

The reasons are examined for the disparity between the inclusive vision espoused by Article 24 of the United Nations Convention on the Rights of Persons with Disabilities and the reality of the limited extent of inclusion in education systems worldwide. First, the leadership of key senior academics in the field of special education is considered to have been misguided in promoting a vision of full inclusion despite the lack of research evidence for the benefits of inclusive education over traditional special education provision. Second, attitudes toward and the treatment of people with disabilities have a long and complex history, and in this, many proponents of inclusion have been critical of 20th century special education. In particular, they claim that the sorting, labelling and categorizing required by special education have negative implications. Third, educators have been encouraged to imagine a system of education that is limitless, in the sense that all children with disabilities can be included in general education. This is because it is envisaged that general education classrooms will become so flexible that there will be no limits to the accommodation of students with disabilities, regardless of the nature or severity of their special educational needs. Fourth is the issue that deciding a student’s placement for education requires a judgment call and that, since human judgment is fallible, errors of judgment will always be made. Fifth, commitments to inclusion require that educators consider the practical, reality-based implications, whereas this has not been the case for many supporters of full inclusion. In conclusion, inclusion in the sense of students being physically present in general education classrooms is not considered as important as inclusion in the reality of being engaged in a program of instruction that is meaningful and challenging. Therefore, we consider that, rather than becoming extinct, special education needs to continue to be developed, disseminated and rigorously implemented in schools. Key special education strategies and approaches must co-exist with those from inclusive education, in order to provide effective education for all young people with special educational needs and disabilities.