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https://www.readbyqxmd.com/read/28917658/multiple-events-of-gene-manipulation-via-in-pouch-electroporation-in-a-marsupial-model-of-mammalian-forebrain-development
#1
Annalisa Paolino, Laura R Fenlon, Peter Kozulin, Linda J Richards, Rodrigo Suárez
BACKGROUND: The technique of in utero electroporation has been widely used in eutherians, such as mice and rats, to investigate brain development by selectively manipulating gene expression in specific neuronal populations. A major challenge, however, is that surgery is required to access the embryos, affecting animal survival and limiting the number of times it can be performed within the same litter. New method: Marsupials are born at an early stage of brain development as compared to eutherians...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28895534/molecular-conservation-of-marsupial-and-eutherian-placentation-and-lactation
#2
Michael W Guernsey, Edward B Chuong, Guillaume Cornelis, Marilyn B Renfree, Julie C Baker
Eutherians are often mistakenly termed 'placental mammals', but marsupials also have a placenta to mediate early embryonic development. Lactation is necessary for both infant and fetal development in eutherians and marsupials, although marsupials have a far more complex milk repertoire that facilitates morphogenesis of developmentally immature young. In this study, we demonstrate that the anatomically simple tammar placenta expresses a dynamic molecular program that is reminiscent of eutherian placentation, including both fetal and maternal signals...
September 12, 2017: ELife
https://www.readbyqxmd.com/read/28895533/what-is-a-placental-mammal-anyway
#3
Patrick Abbot, John A Capra
Many developmental functions in marsupials and eutherian mammals are accomplished by different tissues, but similar genes.
September 12, 2017: ELife
https://www.readbyqxmd.com/read/28880940/development-of-body-head-and-brain-features-in-the-australian-fat-tailed-dunnart-sminthopsis-crassicaudata-marsupialia-dasyuridae-a-postnatal-model-of-forebrain-formation
#4
Rodrigo Suárez, Annalisa Paolino, Peter Kozulin, Laura R Fenlon, Laura R Morcom, Robert Englebright, Patricia J O'Hara, Peter J Murray, Linda J Richards
Most of our understanding of forebrain development comes from research of eutherian mammals, such as rodents, primates, and carnivores. However, as the cerebral cortex forms largely prenatally, observation and manipulation of its development has required invasive and/or ex vivo procedures. Marsupials, on the other hand, are born at comparatively earlier stages of development and most events of forebrain formation occur once attached to the teat, thereby permitting continuous and non-invasive experimental access...
2017: PloS One
https://www.readbyqxmd.com/read/28874269/locomotion-and-basicranial-anatomy-in-primates-and-marsupials
#5
Catalina I Villamil
There is ongoing debate in paleoanthropology about whether and how the anatomy of the cranium, and especially the cranial base, is evolving in response to locomotor and postural changes. However, the majority of studies focus on two-dimensional data, which fails to capture the complexity of cranial anatomy. This study tests whether three-dimensional cranial base anatomy is linked to locomotion or to other factors in primates (n = 473) and marsupials (n = 231). Results indicate that although there is a small effect of locomotion on cranial base anatomy in primates, this is not the case in marsupials...
October 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28872729/a-retrospective-cohort-study-of-the-cumulative-survival-rate-of-obturator-prostheses-for-marsupialization
#6
Mamoru Murakami, Yasuhiro Nishi, Misaki Nishio, Yoko Minemoto, Takaharu Shimizu, Masahiro Nishimura
PURPOSE: After marsupialization of benign tumors and jawbone cysts, insertion of an obturator prosthesis maintains the surgical opening and improves hygiene. To date, there have been no reports clarifying the relationship between the obturator design and treatment outcomes. The purpose of this study was to examine the survival rate of three types of obturator, and to investigate the factors that expedite the removal of the obturator. MATERIALS AND METHODS: The subject group comprised 100 patients who had an obturator inserted after marsupialization at Kagoshima University Hospital between May 31, 2012 and March 31, 2015; 73 patients with lesions in the mandible were eligible...
September 5, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28864293/dna-methylation-profiles-of-22-apoptosis-related-genes-in-odontogenic-keratocysts-before-and-after-marsupialization
#7
Karuza Maria Alves Pereira, Sara Ferreira Dos Santos Costa, Núbia Braga Pereira, Marina Gonçalves Diniz, Wagner Henriques Castro, Carolina Cavaliéri Gomes, Ricardo Santiago Gomez
OBJECTIVE: Odontogenic keratocysts (OKCs) are cystic lesions of the jaw and tend to recur after treatment. Marsupialization is an effective preliminary treatment for large OKCs. This procedure induces epithelial lining changes in association with reduction of Bcl-2 protein expression, but the underlying mechanisms remain unknown. The purpose of our study was to compare the methylation profile of the apoptosis-related genes of OKCs before and after marsupialization. STUDY DESIGN: We assessed the methylation percentages of the promoter region of 22 apoptosis-related genes in 13 OKCs, both marsupialized and nonmarsupialized lesions, by using methylation quantitative polymerase chain reaction array...
August 3, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28864021/the-core-transcriptome-of-mammalian-placentas-and-the-divergence-of-expression-with-placental-shape
#8
Don L Armstrong, Michael R McGowen, Amy Weckle, Priyadarshini Pantham, Jason Caravas, Dalen Agnew, Kurt Benirschke, Sue Savage-Rumbaugh, Eviatar Nevo, Chong J Kim, Günter P Wagner, Roberto Romero, Derek E Wildman
INTRODUCTION: The placenta is arguably the most anatomically variable organ in mammals even though its primary function is conserved. METHOD: Using RNA-Seq, we measured the expression profiles of 55 term placentas of 14 species of mammals representing all major eutherian superordinal clades and marsupials, and compared the evolution of expression across clades. RESULTS: We identified a set of 115 core genes which is expressed (FPKM ≥10) in all eutherian placentas, including genes with immune-modulating properties (ANXA2, ANXA1, S100A11, S100A10, and LGALS1), cell-cell interactions (LAMC1, LUM, and LGALS1), invasion (GRB2 and RALB) and syncytialization (ANXA5 and ANXA1)...
September 2017: Placenta
https://www.readbyqxmd.com/read/28857166/atlantic-camtraps-a-dataset-of-medium-and-large-terrestrial-mammal-communities-in-the-atlantic-forest-of-south-america
#9
Fernando Lima, Gabrielle Beca, Renata de Lara Muylaert, Clinton N Jenkins, Miriam Lucia Lages Perilli, Ana Maria de Oliveira Paschoal, Rodrigo Lima Massara, Adriano Pereira Paglia, Adriano Garcia Chiarello, Maurício Eduardo Graipel, Jorge José Cherem, André Luis Regolin, Luiz Gustavo Rodrigues Oliveira Santos, Carlos Rodrigo Brocardo, Agustín Paviolo, Mario S Di Bitetti, Leandro Moraes Scoss, Fabiana Lopes Rocha, Roberto Fusco-Costa, Clarissa Alves da Rosa, Marina Xavier da Silva, Ludmila Hufnagel, Paloma Marques Santos, Gabriela Teixeira Duarte, Luiza Neves Guimarães, Larissa Lynn Bailey, Flávio Henrique Guimarães Rodrigues, Heitor Morais Cunha, Felipe Moreli Fantacini, Graziele Oliveira Batista, Juliano André Bogoni, Marco Adriano Tortato, Micheli Ribeiro Luiz, Nivaldo Peroni, Pedro Volkmer de Castilho, Thiago Bernardes Maccarini, Vilmar Picinatto Filho, Carlos De Angelo, Paula Cruz, Verónica Quiroga, María Eugenia Iezzi, Diego Varela, Sandra Maria Cintra Cavalcanti, Alexandre Camargo Martensen, Erica Vanessa Maggiorini, Fabíola Ferreira Keesen, André Valle Nunes, Gisele Mendes Lessa, Pedro Cordeiro-Estrela, Mayara Guimarães Beltrão, Anna Carolina Figueiredo de Albuquerque, Bianca Ingberman, Camila Righetto Cassano, Laury Cullen Junior, Milton Cezar Ribeiro, Mauro Galetti
Our understanding of mammal ecology has always been hindered by the difficulties of observing species in closed tropical forests. Camera trapping has become a major advance for monitoring terrestrial mammals in biodiversity rich ecosystems. Here we compiled one of the largest datasets of inventories of terrestrial mammal communities for the Neotropical region based on camera trapping studies. The dataset comprises 170 surveys of medium to large terrestrial mammals using camera traps conducted in 144 areas by 74 studies, covering six vegetation types of tropical and subtropical Atlantic Forest of South America (Brazil and Argentina), and present data on species composition and richness...
August 31, 2017: Ecology
https://www.readbyqxmd.com/read/28834173/conserved-and-variable-understanding-mammary-stem-cells-across-species
#10
REVIEW
Gat Rauner, Melissa M Ledet, Gerlinde R Van de Walle
Postnatal mammary gland development requires the presence of mammary stem and progenitor cells (MaSC), which give rise to functional milk-secreting cells and regenerate the mammary epithelium with each cycle of lactation. These long-lived, tissue-resident MaSC are also targets for malignant transformation and may be cancer cells-of-origin. Consequently, MaSC are extensively researched in relation to their role and function in development, tissue regeneration, lactation, and breast cancer. The basic structure and function of the mammary gland are conserved among all mammalian species, from the most primitive to the most evolved...
August 22, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28814902/orbital-apex-cyst-a-rare-cause-of-compressive-optic-neuropathy-post-functional-endoscopic-sinus-surgery
#11
Yi Ni Koh, Shu Fen Ho, Letchumanan Pathma, Harvinder Singh, Embong Zunaina
There are various causes that can lead to compressive optic neuropathy. We present here orbital apex cyst as an unusual cause of compressive optic neuropathy in a 49-year-old male. He presented with 2 weeks painless loss of vision in the left eye with left-sided headache. He had had left functional endoscopic sinus surgery for left nasal polyps 4 years earlier. Magnetic resonance imaging of brain and orbit revealed a left discrete orbital nodule, possibly orbital cyst or mucocele, which was compressing on the left optic nerve...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28813431/skeleton-of-an-unusual-cat-sized-marsupial-relative-metatheria-marsupialiformes-from-the-middle-eocene-lutetian-44-43-million-years-ago-of-turkey
#12
A Murat Maga, Robin M D Beck
We describe a near-complete, three-dimensionally preserved skeleton of a metatherian (relative of modern marsupials) from the middle Eocene (Lutetian: 44-43 million years ago) Lülük member of the Uzunçarşıdere Formation, central Turkey. With an estimated body mass of 3-4 kg, about the size of a domestic cat (Felis catus) or spotted quoll (Dasyurus maculatus), it is an order of magnitude larger than the largest fossil metatherians previously known from the Cenozoic of the northern hemisphere. This new taxon is characterised by large, broad third premolars that probably represent adaptations for hard object feeding (durophagy), and its craniodental morphology suggests the capacity to generate high bite forces...
2017: PloS One
https://www.readbyqxmd.com/read/28811882/seasonal-changes-in-leaf-chemistry-and-leaf-selection-of-the-japanese-giant-flying-squirrel-upon-two-tree-species
#13
Mutsumi Ito, Noriko Tamura, Fumio Hayashi
Tree leaves are important food sources for arboreal herbivores, such as primates, rodents, and marsupials. These animals do not eat leaves randomly in habitats with many tree species but rather choose based on the chemical components of leaves, such as sugars, fibers, proteins, and toxins. However, the effects of the microscale distribution of these chemicals within each leaf have not been examined for these animals. The giant flying squirrels Petaurista leucogenys are entirely arboreal, nocturnal herbivores, usually feeding on leaves and dropping leaf debris on the ground after partially consuming them...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28809378/reduction-rate-by-decompression-as-a-treatment-of-odontogenic-cysts
#14
L Oliveros-Lopez, A Fernandez-Olavarria, D Torres-Lagares, M-A Serrera-Figallo, R Castillo-Oyagüe, J-J Segura-Egea, J-L Gutierrez-Perez
BACKGROUND: Odontogenic cysts are defined as those cysts that arise from odontogenic epithelium and occur in the tooth-bearing regions of the jaws. Cystectomy, marsupialization or decompression of odontogenic cyst are treatment approach to this pathology. The aim of this study was to evaluate the effectiveness of the decompression as the primary treatment of the cystic lesions of the jaws and them reduction rates involving different factors. MATERIAL AND METHODS: 23 patients with odontogenic cysts of the jaws, previously diagnosed by anatomical histopathology (follicular cysts (7) and radicular cysts (16)) underwent decompression as an initial treatment...
September 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28809370/marsupialization-facilitates-movement-of-the-cystic-lesion-associated-deeply-impacted-mandibular-third-molar-in-spite-of-its-mature-roots
#15
R Sun, Y Cai, Y Wu, J-H Zhao
BACKGROUND: The odontogenic cystic lesions happened in the angle and ramus region are frequently associated with impacted mandibular third molars. The treatment plan was difficult to work out for the huge cystic lesions with deeply impacted third molars, since the enucleation with simultaneously removing the deeply impacted teeth may cause serious complications. Therefore, the marsupialization of the cystic lesions followed by enucleation with tooth removal has also been advocated. The aim of this study was to explore the movement of cystic lesion-associated deeply impacted mandibular third molars (IMTM) after marsupialization...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28797038/plant-diversity-and-structure-describe-the-presence-of-a-new-threatened-australian-marsupial-within-its-highly-restricted-post-fire-habitat
#16
Eugene D Mason, Jennifer Firn, Harry B Hines, Andrew M Baker
Management of critical habitat for threatened species with small ranges requires location-specific, fine-scale survey data. The silver-headed antechinus (Antechinus argentus) is known from only two isolated, fire-prone locations. At least one of these populations, at Kroombit Tops National Park in central-eastern Queensland, Australia, possesses a very small range. Here, we present detailed vegetation species diversity and structure data from three sites comprising the known habitat of A. argentus at Kroombit Tops and relate it to capture data obtained over two years...
2017: PloS One
https://www.readbyqxmd.com/read/28792958/can-remote-infrared-cameras-be-used-to-differentiate-small-sympatric-mammal-species-a-case-study-of-the-black-tailed-dusky-antechinus-antechinus-arktos-and-co-occurring-small-mammals-in-southeast-queensland-australia
#17
Emma L Gray, Todd E Dennis, Andrew M Baker
The black-tailed dusky antechinus (Antechinus arktos) is an endangered, small carnivorous marsupial endemic to Australia, which occurs at low population density along with abundant sympatric populations of other small mammals: Antechinus stuartii, Rattus fuscipes and Melomys cervinipes. Using A. arktos as a model species, we aimed to evaluate the effectiveness of infrared digital camera traps for detecting and differentiating small mammals and to comment on the broad applicability of this methodology. We also sought to understand how the detection probabilities of our target species varied over time and characterize their activity patterns...
2017: PloS One
https://www.readbyqxmd.com/read/28792929/new-gliding-mammaliaforms-from-the-jurassic
#18
Qing-Jin Meng, David M Grossnickle, Di Liu, Yu-Guang Zhang, April I Neander, Qiang Ji, Zhe-Xi Luo
Stem mammaliaforms are Mesozoic forerunners to mammals, and they offer critical evidence for the anatomical evolution and ecological diversification during the earliest mammalian history. Two new eleutherodonts from the Late Jurassic period have skin membranes and skeletal features that are adapted for gliding. Characteristics of their digits provide evidence of roosting behaviour, as in dermopterans and bats, and their feet have a calcaneal calcar to support the uropagatium as in bats. The new volant taxa are phylogenetically nested with arboreal eleutherodonts...
August 17, 2017: Nature
https://www.readbyqxmd.com/read/28791270/herlyn-werner-wunderlich-syndrome-an-unusual-presentation-with-pyocolpos
#19
Eun Jung Jung, Moon Hyeong Cho, Da Hyun Kim, Jung Mi Byun, Young Nam Kim, Dae Hoon Jeong, Moon Su Sung, Ki Tae Kim, Kyung Bok Lee
Herlyn-Werner-Wunderlich syndrome is a rare congenital anomaly of the urogenital tract, which is characterized by the triad of uterus didelphys, obstructed hemivagina, and ipsilateral renal agenesis. It usually presents at puberty with pelvic pain, dysmenorrhea, and a vaginal or pelvic mass. Although rare, it may present with purulent vaginal discharge due to secondary infection of the obstructed hemivagina, making diagnosis difficult. A careful pelvic examination to identify the cervix and vagina is the key to the diagnosis of Müllerian duct anomalies and magnetic resonance imaging can provide additional useful information...
July 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28762355/bismuth-subnitrate-iodoform-parafin-paste-used-in-the-management-of-inflammatory-follicular-cyst-report-of-two-cases
#20
Abdul Morawala, Dayanand Shirol, Yusuf Chunawala, Nupur Kanchan, Mayuri Kale
Dentigerous cyst or follicular cyst is a type of odontogenic cyst which encloses the crown of an unerupted tooth and is attached to the amelocemental junction and is the second most common odontogenic cyst contributing about 16.6% to 21.3% of all odontogenic cysts. Occurrence of Dentigerous cysts according to Shear is usually in 3rd and 4th decade in contrast to this finding Shibata et al showed that the age of discovery of the dentigerous cyst was generally 9-11 years. The treatment indicated for dentigerous cysts are surgical enucleation of the cyst, along with removal of the involved tooth; or the use of a marsupialization technique, which removes the cyst while preserving the developing tooth...
July 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
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