RESUMO
Rodents are important in the transmission of infectious diseases that affect the respiratory tract, including simple infections and those caused by specific pathogens. These animals are natural reservoirs of zoonoses that cause many public health diseases. Basic knowledge on the morphology of these animals is important as basic research is useful for applied studies, such as the development of clinical, therapeutic, surgical and clinical models. Morphological data of respiratory tract in Oligoryzomys nigripes are absent in the literature. Therefore, the aim of this study was to perform a morphological analysis of the respiratory tract of O. nigripes. Five adult females from the environmental reserve in São Joaquim da Barra, São Paulo were used, donated to the Museum of Veterinary Anatomy (FMVZ/USP). Several morphological features follow the same pattern seen in rodents; however, this species showed some differences such as the presence of three lobar bronchi, nonlobed left lung and the right lung constituted by two lobes. Respiratory epithelium lined the whole respiratory tract and was seen using scanning electron microscopy the oval shape of the parenchyma and alveoli.
Assuntos
Sistema Respiratório/anatomia & histologia , Sigmodontinae/anatomia & histologia , Animais , Biometria , Feminino , Laringe/anatomia & histologia , Pulmão/anatomia & histologia , Microscopia Eletrônica de Varredura , Nariz/anatomia & histologia , Sistema Respiratório/ultraestrutura , Traqueia/anatomia & histologiaRESUMO
Diabetes mellitus is a common disease in dogs and cats. It consists of a group of metabolic diseases characterized by hyperglycemia resulting from defects in secretion and/or insulin activity. The islets of Langerhans from donor pancreas may be an alternative for the cure of diabetes, however, this approach is limited because the donation is scarce and complications occur due to the concurrent use of immunosuppressive drugs. For many decades researchers have sought ways to replace pancreatic islets in diabetic individuals. Current studies in progress with stem cell culture for production of pancreatic islet cells are promising, despite the difficulties in their production. This review reports several aspects concerning the use of stem cells in diabetes cell therapy. Recent studies in mice have shown that embryonic stem cells can be induced to differentiate into insulin-producing -cells. In parallel with this study, a new class of stem cells has emerged, i.e. induced pluripotent stem cells (iPSCs) aimed at clinical and therapeutic use. Adult stem cells may circumvent the ethical issues surrounding embryonic stem cells and allow auto-transplantation.
RESUMO
The aim of this research was to study the topography and morphology of Australian parakeet (Melopsittacus undulatus) viscera. Ten Australian parakeet were used (5 males and 5 females). The animals were fixed in 10% formaldehyde solution, through perfusion in the musculature and visceral cavity. Macroscopically, the Australian parakeet viscera did not show expressive differences when compared to other domestic birds species. Microscopically, the main difference was the presence of mechanoreceptors (Corpuscles of Pacini) in the tongue, found for the first time in this psittaciform species.KEY WORDS: Melopsittacus undulatus, morphology, topography, viscera.
Em virtude da escassez de dados referentes à morfologia e topografia das aves em geral, o presente estudo teve como objetivo descrever a topografia e morfologia das vísceras do periquito-australiano (Melopsittacus undulatus), para assim proporcionar um conhecimento mais amplo sobre características específicas dessa espécie. Para a descrição da morfologia e topografia das vísceras foram utilizados dez periquitos, sendo cinco machos e cinco fêmeas. Os animais foram fixados com solução de formaldeído 10%, através de perfusão na musculatura e cavidade visceral. Macroscopicamente, as vísceras do periquito não apresentaram muitas diferenças comparadas a outras espécies de aves domésticas. Microscopicamente, a principal diferença estava na presença de mecanorreceptores (corpúsculos de Pacini) na língua, encontrados pela primeira vez nesta espécie de psitaciforme. PALAVRAS-CHAVES: Melopsittacus undulatus, morfologia, topografia, vísceras.
RESUMO
The aim of this research was to study the topography and morphology of Australian parakeet (Melopsittacus undulatus) viscera. Ten Australian parakeet were used (5 males and 5 females). The animals were fixed in 10% formaldehyde solution, through perfusion in the musculature and visceral cavity. Macroscopically, the Australian parakeet viscera did not show expressive differences when compared to other domestic birds species. Microscopically, the main difference was the presence of mechanoreceptors (Corpuscles of Pacini) in the tongue, found for the first time in this psittaciform species.KEY WORDS: Melopsittacus undulatus, morphology, topography, viscera.
Em virtude da escassez de dados referentes à morfologia e topografia das aves em geral, o presente estudo teve como objetivo descrever a topografia e morfologia das vísceras do periquito-australiano (Melopsittacus undulatus), para assim proporcionar um conhecimento mais amplo sobre características específicas dessa espécie. Para a descrição da morfologia e topografia das vísceras foram utilizados dez periquitos, sendo cinco machos e cinco fêmeas. Os animais foram fixados com solução de formaldeído 10%, através de perfusão na musculatura e cavidade visceral. Macroscopicamente, as vísceras do periquito não apresentaram muitas diferenças comparadas a outras espécies de aves domésticas. Microscopicamente, a principal diferença estava na presença de mecanorreceptores (corpúsculos de Pacini) na língua, encontrados pela primeira vez nesta espécie de psitaciforme. PALAVRAS-CHAVES: Melopsittacus undulatus, morfologia, topografia, vísceras.