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https://www.readbyqxmd.com/read/28717292/conservative-management-of-unicystic-ameloblastoma-in-young-patients-a-prospective-single-center-trial-and-review-of-literature
#1
Mitsu Meshram, Lalit Sagarka, Jigar Dhuvad, Sonal Anchlia, Siddharth Vyas, Harsh Shah
AIMS: The study intends to evaluate the clinical outcome of treating young patients of unicystic ameloblastoma, by various conservative treatment modalities such as marsupialization, enucleation with bone curettage and aid in establishing sound treatment guidelines. MATERIALS AND METHODS: A case series of fifteen patients is presented of unicystic ameloblastoma, who presented to our Department over the past 6 years (2010-2015) and conservative method of treatment elected in all the patients...
September 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28704561/diet-overlap-and-spatial-segregation-between-two-neotropical-marsupials-revealed-by-multiple-analytical-approaches
#2
Vanessa Villanova Kuhnen, Gustavo Quevedo Romero, Arício Xavier Linhares, Jeferson Vizentin-Bugoni, Erica Aline Correa Porto, Eleonore Zulnara Freire Setz
Species co-existence depends on how organisms utilize their environment and resources. When two sympatric species are similar in some ecological requirements, their coexistence may arise from differences in resource use over time and/or space. Interactions among coexisting marsupials remain poorly understood, especially in the Neotropics. Here we combine spatial niche measurements, individual-resource networks, and isotopic niche approaches, to investigate the ecological strategies used by the Neotropical marsupials Didelphis aurita and Metachirus nudicaudatus to co-occur in an area of Serra do Mar State Park (southeast of Brazil)...
2017: PloS One
https://www.readbyqxmd.com/read/28695294/the-role-of-mhc-genes-in-contagious-cancer-the-story-of-tasmanian-devils
#3
REVIEW
Alison Caldwell, Hannah V Siddle
The Tasmanian devil, a marsupial species endemic to the island of Tasmania, harbours two contagious cancers, Devil Facial Tumour 1 (DFT1) and Devil Facial Tumour 2 (DFT2). These cancers pass between individuals in the population via the direct transfer of tumour cells, resulting in the growth of large tumours around the face and neck of affected animals. While these cancers are rare, a contagious cancer also exists in dogs and five contagious cancers circulate in bivalves. The ability of tumour cells to emerge and transmit in mammals is surprising as these cells are an allograft and should be rejected due to incompatibility between Major Histocompatibility Complex (MHC) genes...
July 11, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28689530/congenital-vallecular-cyst-arare-and-potentially-lethal-condition
#4
Shabbir Ahmed Mallick, Tabinda Naz Qureshi, Ajoy Methew Varghese, Mona Mohammed Al Busaidi
Congenital vallecular cyst is a rare laryngeal lesion, accounting for 10-20% of all laryngeal cysts, with a potential to cause severe upper airway obstruction, which can be fatal. It can cause stridor, apnea, cyanosis, respiratory distress, and feeding difficulties. Diagnosis requires a high level of clinical suspicion and helps in timely intervention. Direct laryngoscopy is gold standard for definitive diagnosis. Treatment options include aspiration, marsupialization, and surgical excision. Here, we report a case of 7-week-old infant with complain of recurrent episodes of cyanosis when agitated, since the age of 3 weeks, admitted with impression of apparent life-threatening events (ALTEs)...
June 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28688214/uterine-molecular-changes-for-non-invasive-embryonic-attachment-in-the-marsupials-macropus-eugenii-macropodidae-and-trichosurus-vulpecula-phalangeridae
#5
Melanie K Laird, Jessica R Dargan, Lillian Paterson, Christopher R Murphy, Bronwyn M McAllan, Geoff Shaw, Marilyn B Renfree, Michael B Thompson
Pregnancy in mammals requires remodelling of the uterus to become receptive to the implanting embryo. Remarkably similar morphological changes to the uterine epithelium occur in both eutherian and marsupial mammals, irrespective of placental type. Nevertheless, molecular differences in uterine remodelling indicate that the marsupial uterus employs maternal defences, including molecular reinforcement of the uterine epithelium, to regulate embryonic invasion. Non-invasive (epitheliochorial) embryonic attachment in marsupials likely evolved secondarily from invasive attachment, so uterine defences in these species may prevent embryonic invasion...
July 8, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28686679/the-acoustic-repertoire-and-behavioural-context-of-the-vocalisations-of-a-nocturnal-dasyurid-the-eastern-quoll-dasyurus-viverrinus
#6
Annalie Dorph, Paul G McDonald
Defining an acoustic repertoire is essential to understanding vocal signalling and communicative interactions within a species. Currently, quantitative and statistical definition is lacking for the vocalisations of many dasyurids, an important group of small to medium-sized marsupials from Australasia that includes the eastern quoll (Dasyurus viverrinus), a species of conservation concern. Beyond generating a better understanding of this species' social interactions, determining an acoustic repertoire will further improve detection rates and inference of vocalisations gathered by automated bioacoustic recorders...
2017: PloS One
https://www.readbyqxmd.com/read/28683451/sleep-related-electrophysiology-and-behavior-of-tinamous-eudromia-elegans-tinamous-do-not-sleep-like-ostriches
#7
Ryan K Tisdale, Alexei L Vyssotski, John A Lesku, Niels C Rattenborg
The functions of slow wave sleep (SWS) and rapid eye movement (REM) sleep, distinct sleep substates present in both mammals and birds, remain unresolved. One approach to gaining insight into their function is to trace the evolution of these states through examining sleep in as many taxonomic groups as possible. The mammalian and avian clades are each composed of two extant groups, i.e., the monotremes (echidna and platypus) and therian (marsupial and eutherian [or placental]) mammals, and Palaeognaths (cassowaries, emus, kiwi, ostriches, rheas, and tinamous) and Neognaths (all other birds) among birds...
July 7, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/28679786/juvenile-marsupials-need-the-sun-to-warm-up
#8
Julia Nowack
No abstract text is available yet for this article.
July 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28678954/occurrence-of-dermoid-cyst-in-the-floor-of-the-mouth-the-importance-of-differential-diagnosis-in-pediatric-patients
#9
Edela Puricelli, Bernardo Ottoni Braga Barreiro, Alexandre Silva Quevedo, Deise Ponzoni
Lesions in the floor of the mouth can be a challenging diagnosis due to the variety of pathological conditions that might be found in this area. Within a broad range of lesions, attention has to be addressed to those that require specific management, such as a dermoid cyst (DC) and a ranula. Especially in pediatric patients, in whom the failure of diagnosis can postpone the correct treatment and cause sequelae later in life. DC, a developmental anomaly, is managed primarily by surgical resection. On the other hand, ranula is a pseudocyst that may be treated by marsupialization...
May 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28670836/epithelial-cadherin-disassociates-from-the-lateral-plasma-membrane-of-uterine-epithelial-cells-throughout-pregnancy-in-a-marsupial
#10
Jessica S Dudley, Christopher R Murphy, Michael B Thompson, Bronwyn M McAllan
The uterine luminal epithelium is the first site of contact between fetal and maternal tissues during therian pregnancy and must undergo specialised changes for implantation of the blastocyst to be successful. These changes, collectively termed the plasma membrane transformation (PMT), allow the blastocyst to attach to the uterine epithelium preceding the formation of a placenta. There are similarities in the morphological and molecular changes occurring in live-bearing eutherian species during the PMT studied so far...
July 3, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28667298/evolution-of-gene-expression-in-the-uterine-cervix-related-to-steroid-signaling-conserved-features-in-the-regulation-of-cervical-ripening
#11
Günter P Wagner, Mauris C Nnamani, Arun Rajendra Chavan, Jamie Maziarz, Stella Protopapas, Jennifer Condon, Roberto Romero
The uterine cervix is the boundary structure between the uterus and the vagina and is key for the maintenance of pregnancy and timing of parturition. Here we report on a comparative transcriptomic study of the cervix of four placental mammals, mouse, guinea pig, rabbit and armadillo, and one marsupial, opossum. Our aim is to investigate the evolution of cervical gene expression as related to putative mechanisms for functional progesterone withdrawal. Our findings are: 1) The patterns of gene expression in eutherian (placental) mammals are consistent with the notion that an increase in the E/P4 signaling ratio is critical for cervical ripening...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28663566/marsupial-brood-care-in-cretaceous-tanaidaceans
#12
Alba Sánchez-García, Xavier Delclòs, Michael S Engel, Graham J Bird, Vincent Perrichot, Enrique Peñalver
Parental care in animal evolution has long fascinated biologists, but tracing this complex of behavioural repertoires is challenging, as these transitory states often leave no corporeal traces as fossils. Among modern invertebrates, the tanaidaceans (Malacostraca: Peracarida), a lineage of marsupial crustaceans, show an interesting variety of brooding strategies. Here we report on fossil tanaidaceans from the Cretaceous of Spain and France that provide conclusive evidence for marsupial care of brood-offspring...
June 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28652619/testing-hypotheses-of-developmental-constraints-on-mammalian-brain-partition-evolution-using-marsupials
#13
Alison Carlisle, Lynne Selwood, Lyn A Hinds, Norman Saunders, Mark Habgood, Karine Mardon, Vera Weisbecker
There is considerable debate about whether the partition volumes of the mammalian brain (e.g. cerebrum, cerebellum) evolve according to functional selection, or whether developmental constraints of conserved neurogenetic scheduling cause predictable partition scaling with brain size. Here we provide the first investigation of developmental constraints on partition volume growth, derived from contrast-enhanced micro-computed tomography of hydrogel-stabilized brains from three marsupial species. ANCOVAs of partition vs...
June 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28650779/management-of-ranula-in-a-child-by-modified-micro-marsupialization-technique-a-case-report
#14
Sapna Hegde, Ketan Bubna, Dinesh Rao
Ranulas pose a challenging situation, both clinically and surgically, because of their location on the floor of the mouth, an area that exhibits tightly-netted vital structures. Several treatments have been proposed, including excision with or without removal of the sublingual gland, marsupialization with or without cauterization of the roof of the lesion, drainage of the lesion, and micro-marsupialization. It has been suggested that a modified micro-marsupialization technique can establish drainage of saliva and formation of new permanent epithelized tracts along the path of sutures, thereby reducing the recurrence...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28620997/morphology-and-evolution-of-the-oral-shield-in-marsupial-neonates-including-the-newborn-monito-del-monte-dromiciops-gliroides-marsupialia-microbiotheria-pouch-young
#15
Nanette Y Schneider, Yamila Gurovich
Newborn marsupials can be arranged into three grades of developmental complexity based on their external form, as well as based on their organ systems and their cytology. The dasyurids are considered the least developed marsupials at birth, while didelphids and peramelids are intermediate, and macropods are the most developed. Currently there is still little information on caenolestid and microbiotherid development at birth. Developmental stages can be graded as G1, G2 and G3, with G1 being the least developed at birth, and G3 the most developed...
July 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28587847/molecular-cloning-and-tissue-distribution-of-crh-and-pomc-mrna-in-the-fat-tailed-dunnart-sminthopsis-crassicaudata-an-australian-marsupial
#16
Ellyse B Noy, Melissa K Scott, Sylvia V H Grommen, Kylie A Robert, Bert De Groef
Like all vertebrates, marsupials respond to stressors with the activation of the hypothalamo-pituitary-adrenal axis. However, peptides operating at the higher regulatory levels of this hormonal system, i.e. corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH), have not been investigated in marsupials. Here we report the molecular cloning of the precursor cDNAs of CRH (prepro-CRH) and of ACTH (proopiomelanocortin; POMC) in an Australian marsupial, the fat-tailed dunnart (Sminthopsis crassicaudata)...
June 3, 2017: Gene
https://www.readbyqxmd.com/read/28576823/heart-rate-dynamics-in-a-marsupial-hibernator
#17
Steven J Swoap, Gerhard Körtner, Fritz Geiser
The eastern pygmy-possum (Cercartetus nanus) is a small marsupial that can express spontaneous short bouts of torpor, as well as multi-day bouts of deep hibernation. To examine heart rate (HR) control at various stages of torpor in a marsupial hibernator, and to see whether HR variability differs from deep placental hibernators, we used radiotelemetry to measure ECG and Tb while measuring the rate of O2 consumption and ventilation. The HR and rate of O2 consumption during euthermia was at its minimum (321±34 bpm, 0...
June 2, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28558801/astroglial-mediated-remodeling-of-the-interhemispheric-midline-during-telencephalic-development-is-exclusive-to-eutherian-mammals
#18
Ilan Gobius, Rodrigo Suárez, Laura Morcom, Annalisa Paolino, Timothy J Edwards, Peter Kozulin, Linda J Richards
The corpus callosum forms the major interhemispheric connection in the human brain and is unique to eutherian (or placental) mammals. The developmental events associated with the evolutionary emergence of this structure, however, remain poorly understood. A key step in callosal formation is the prior remodeling of the interhemispheric fissure by embryonic astroglial cells, which then subsequently act as a permissive substrate for callosal axons, enabling them to cross the interhemispheric midline. However, whether astroglial-mediated interhemispheric remodeling is unique to eutherian mammals, and thus possibly associated with the phylogenetic origin of the corpus callosum, or instead is a general feature of mammalian brain development, is not yet known...
May 30, 2017: Neural Development
https://www.readbyqxmd.com/read/28529879/beyond-the-raccoon-roundworm-the-natural-history-of-non-raccoon-baylisascaris-species-in-the-new-world
#19
REVIEW
Sarah G H Sapp, Pooja Gupta, Melissa K Martin, Maureen H Murray, Kevin D Niedringhaus, Madeleine A Pfaff, Michael J Yabsley
A total of 10 species of Baylisascaris, a genus of ascaridoid nematodes, occur worldwide and 6 of them occur in the New World. Most of the Baylisascaris species have a similar life cycle with carnivorous mammals or marsupials serving as definitive hosts and a smaller prey host serving as paratenic (or intermediate) hosts. However, one species in rodents is unique in that it only has one host. Considerable research has been conducted on B. procyonis, the raccoon roundworm, as it is a well-known cause of severe to fatal neurologic disease in humans and many wildlife species...
August 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28524458/forelimb-myology-of-carnivorous-marsupials-marsupialia-dasyuridae-implications-for-the-ancestral-body-plan-of-the-australidelphia
#20
Natalie M Warburton, Charlie-Rose Marchal
Carnivorous marsupials of the family Dasyuridae represent a more generalized anatomical condition of both craniodental and postcranial features in comparison to other groups of Australidelphian marsupials. Plesiomorphic characters include polyprotodont dentition, didactylous (rather than syndactylous) pedal morphology, the retention of clavicles and epipubic bones, and an unossified patelloid. In light of the anatomy of the postcranial skeleton, we hypothesized that the muscular anatomy of the Dasyuridae would likely display a range of plesiomorphic traits...
May 19, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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