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  • 1
    In: Veterinary Sciences, MDPI AG, Vol. 9, No. 5 ( 2022-05-10), p. 228-
    Abstract: In addition to Helicobacter pylori, many non-Helicobacter pylori Helicobacters (NHPH) are able to cause gastric disease in humans. Cats are a natural reservoir for many of these species. Accordingly, living in close and intimate contact with animals has been identified as a risk factor, and an important zoonotic significance has therefore been attributed to NHPH. To determine the prevalence and associated gastric histopathological changes of Helicobacter species, the gastric mucosa of 71 cats were evaluated. Only four presented normal histopathological mucosa with the absence of spiral-shaped organisms. Normal gastric mucosa and the presence of spiral-shaped bacteria were observed in 13 cats. The remaining animals presented histopathological changes representative of gastritis. Helicobacter species were detected in 53 cats (74.6%) by at least one detection method. None of the animals were positive for H. pylori or for H. ailurogastricus. Helicobacter heilmannii organisms were identified in 20 animals, predominantly in the body gastric region. Helicobacter salomonis was the second most prevalent species (57.1%), although it was mainly found in association with other NHPH. Helicobacter felis and H. bizzozeronii were less frequently detected. The great majority of the Helicobacter spp. PCR-positive animals presented normal features regarding fibrosis/mucosal atrophy, neutrophils, eosinophils, or other inflammatory cells and lymphofollicular hyperplasia. Given the controversy and the strong evidence of absence of significant histopathological alterations associated with the presence of Helicobacter spp. in cats, it is possible to hypothesize that these bacteria may be able to adapt to the feline gastric microenvironment or even to comprise part of the gastric microbiome of this animal species. Thus, prudency must be taken when prescribing an antibiotic therapy based solely on the presence of these bacteria in the feline stomach.
    Type of Medium: Online Resource
    ISSN: 2306-7381
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2768971-2
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  • 2
    In: Pesquisa Veterinária Brasileira, FapUNIFESP (SciELO), Vol. 37, No. 12 ( 2017-12), p. 1519-1525
    Abstract: RESUMO: Colorações histoquímicas consistem de um conjunto de reações químicas específicas das estruturas ou substâncias endógenas do tecido. Logo a Imunohistoquímica permite observar proteínas presentes nos tecidos relacionadas com fatores determinantes do comportamento biológico e patológico. A padronização dos métodos que avaliam a angiogênese decorrente de procedimentos que utilizam substâncias estimulantes à formação de novos vasos são importantes, a fim de facilitar a execução das pesquisas, bem como auxiliar na interpretação dos dados, visto que em coelhos alguns anticorpos marcadores de angiogênese na pele ainda não são padronizadas em virtude das reações cruzadas que podem ocorrer devido aos anticorpos serem confeccionados a partir de tais animais. Objetivou-se analisar os métodos histoquímicos por meio das colorações e imunohistoquímicas com marcadores de angiogênese em coelhos (Oryctolagus cuniculus) submetidos ao emprego de enxertos cutâneos associado com estimulador de angiogênese plasma rico em plaquetas, a fim de avaliar qual método seria melhor para visualização dos vasos, bem como avaliar qual anticorpo promoveria melhor imunomarcação, buscando-se assim encontrar a diferenças entre os métodos e padronizar a metodologia a ser aplicada em experimentos que utilizem coelhos. Utilizou-se 16 coelhos, separados em dois grupos com oito animais, compreendendo os grupos Gprp (plasma rico em plaquetas) e Gc (controle, solução fisiológica 0,9%). Em todos os animais foi realizada a mesma técnica de cirurgia reconstrutiva de enxertia do tipo malha, os grupos diferiram apenas a aplicação do plasma rico em plaquetas antes da síntese da ferida cirúrgica. As amostras para avaliação da angiogênese foram coletadas após 15 dias do procedimento cirúrgico. Utilizou-se no estudo histoquímico as colorações Hematoxilina & Eosina e Tricrômico de Masson para avaliação da proliferação vascular, e os anticorpos CD31 e CD34 e Caveolina - 1 para avaliação imunohistoquímica. A comparação entre os grupos (Gprp e Gc) em relação à variável categórica (intensidade de proliferação vascular) foi utilizado o teste de Kruskal-Wallis, com valores de p iguais ou inferiores a 0,05 foram considerados significativos. Os dados imuno-histoquímico foram submetidos à análise de variância para um delineamento inteiramente ao acaso, com 2 grupos e 5 repetições (médias) e nível de significância de 5%. Nas comparações múltiplas das médias dos grupos, utilizou-se o teste de Tukey (α = 0,05). A intensidade de proliferação vascular avaliada pelo método histoquímico HE e Tricômico de Masson encontrou-se que tal variável foi significativa no Gprp, quando comparado com o Gc. Avaliando os métodos utilizados não houve diferença significativa. A contagem microvascular (MVC) realizada com os diferentes marcadores (Caveolina-1, CD31 e CD34) foi significativa no Gprp. Correlacionando a contagem microvascular dos três marcadores utilizados não houve diferença significativa, no entanto observou-se marcação mais intensa dos vasos utilizando o anticorpo Caveolina-1, sendo intensa a marcação dos capilares, vasos de pequeno calibre, bem como em vasos maiores. Nas avaliações de CD31 e CD34 observou que houve imunomarcação dos vasos, porém não foi intensa como a Caveolina-1, alguns casos apresentaram fundo, bem como marcação discreta. Os resultados encontrados neste estudo evidenciaram os métodos histoquímicos são eficazes para avaliação semiquantitativa da angiogênese. A comparação imunohistoquímicas da Caveolina-1, CD31 e CD34 como marcadores de angiogênese em coelhos evidenciaram que ambos os anticorpos são capazes de imunomarcar os vasos neoformados, porém a Caveolina-1 apresentou melhor imunomarcação de vasos de pequeno e médio calibre, bem como menor presença de fundo, embora não seja um marcador específico para angiogênese pode ser utilizada como marcador imunohistoquímico de endotélio vascular em coelhos.
    Type of Medium: Online Resource
    ISSN: 1678-5150 , 0100-736X
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2017
    detail.hit.zdb_id: 2028762-8
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  • 3
    In: Biochimica et Biophysica Acta (BBA) - General Subjects, Elsevier BV, Vol. 1830, No. 3 ( 2013-03), p. 2690-2700
    Type of Medium: Online Resource
    ISSN: 0304-4165
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2013
    detail.hit.zdb_id: 2209617-6
    SSG: 12
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  • 4
    In: Helicobacter, Wiley, Vol. 19, No. 4 ( 2014-08), p. 249-259
    Abstract: The gastric mucosa of dogs is often colonized by non ‐Helicobacter pylori helicobacters ( NHPH ), while H. pylori is the predominant gastric Helicobacter species in humans. The colonization of the human gastric mucosa by H. pylori is highly dependent on the recognition of host glycan receptors. Our goal was to define the canine gastric mucosa glycophenotype and to evaluate the capacity of different gastric Helicobacter species to adhere to the canine gastric mucosa. Materials and Methods The glycosylation profile in body and antral compartments of the canine gastric mucosa, with focus on the expression of histo‐blood group antigens was evaluated. The in vitro binding capacity of FITC ‐labeled H. pylori and NHPH to the canine gastric mucosa was assessed in cases representative of the canine glycosylation pattern. Results The canine gastric mucosa lacks expression of type 1 Lewis antigens and presents a broad expression of type 2 structures and A antigen, both in the surface and glandular epithelium. Regarding the canine antral mucosa, H. heilmannii s.s. presented the highest adhesion score whereas in the body region the SabA‐positive H. pylori strain was the strain that adhered more. Conclusions The canine gastric mucosa showed a glycosylation profile different from the human gastric mucosa suggesting that alternative glycan receptors may be involved in Helicobacter spp. binding. Helicobacter pylori and NHPH strains differ in their ability to adhere to canine gastric mucosa. Among the NHPH , H. heilmannii s.s. presented the highest adhesion capacity in agreement with its reported colonization of the canine stomach.
    Type of Medium: Online Resource
    ISSN: 1083-4389 , 1523-5378
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2020336-6
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Frontiers Media SA ; 2021
    In:  Frontiers in Veterinary Science Vol. 8 ( 2021-5-12)
    In: Frontiers in Veterinary Science, Frontiers Media SA, Vol. 8 ( 2021-5-12)
    Abstract: This report provides a clinical, histological, and immunohistochemical description of an unusual hibernoma (pale cell variant) in the subepidermal area of the nipple of a six-year-old bitch. Furthermore, an extensive literature review of hibernomas in animals was made. Physical examination revealed a nodular lesion in the subepidermal area of the third nipple of the left mammary chain. The histopathological findings included lobules of round to oval cells with abundant pale to eosinophilic cytoplasm, containing one or multiple optically empty vacuoles, consistent with nipple hibernoma. Immunohistochemically, the neoplastic cells were negative for cytokeratin AE1/AE3 and p53 but showed strong immunoreaction for vimentin and uncoupling protein-1, thus confirming the brown adipose tissue origin. Local recurrence was not detected after 18 months of follow-up. Hibernomas are rare and benign neoplastic lesions, originating from brown adipose tissue. Due to their histological and molecular resemblance with liposarcoma, a correct diagnosis of these neoplasms is required. In addition, the literature review suggests that hibernomas may present different features, according to species.
    Type of Medium: Online Resource
    ISSN: 2297-1769
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2834243-4
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  • 6
    In: Helicobacter, Wiley, Vol. 27, No. 1 ( 2022-02)
    Abstract: Helicobacter pylori infects half of the world population, being associated with several gastric disorders, such as chronic gastritis and gastric carcinoma. The Helicobacter genus also includes other gastric helicobacters, such as H . heilmannii¸ H . ailurogastricus , H . suis , H . felis , H . bizzozeronii , and H . salomonis . These gastric helicobacters colonize both the human and animal stomach. The prevalence of gastric non‐ Helicobacter pylori Helicobacter (NHPH) species in humans has been described as low, and the in vitro binding to the human gastric mucosa was never assessed. Herein, human gastric tissue sections were used for the evaluation of the tissue glycophenotype and for the binding of gastric NHPH strains belonging to different species. Histopathological evaluation showed that 37.5% of the patients enrolled in our cohort presented chronic gastritis, while the presence of neutrophil or eosinophilic activity (chronic active gastritis) was observed in 62.5% of the patients. The secretor phenotype was observed in 68.8% of the individuals, based on the expression of Lewis B antigen and binding of the UleX lectin. The in vitro binding assay showed that all the NHPH strains evaluated were able to bind, albeit in low frequency, to the human gastric mucosa. The H . heilmannii , H . bizzozeronii , and H . salomonis strains displayed the highest binding ability both to the gastric superficial epithelium and to the deep glands. Interestingly, we observed binding of NHPH to the gastric mucosa of individuals with severe chronic inflammation and intestinal metaplasia, suggesting that NHPH binding may not be restricted to the healthy gastric mucosa or slight chronic gastritis. Furthermore, the in vitro binding of NHPH strains was observed both in secretor and non‐secretor individuals in a similar frequency. In conclusion, this study is the first report of the in vitro binding ability of gastric NHPH species to the human gastric mucosa. The results suggest that other glycans, besides the Lewis antigens, could be involved in the bacterial adhesion mechanism; however, the molecular intervenients remain unknown.
    Type of Medium: Online Resource
    ISSN: 1083-4389 , 1523-5378
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020336-6
    SSG: 12
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  • 7
    In: BMC Veterinary Research, Springer Science and Business Media LLC, Vol. 11, No. 1 ( 2015-12)
    Type of Medium: Online Resource
    ISSN: 1746-6148
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2015
    detail.hit.zdb_id: 2191675-5
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  • 8
    In: Journal of Agricultural Science, Canadian Center of Science and Education, Vol. 9, No. 4 ( 2017-03-14), p. 51-
    Abstract: Skin graft is one of the techniques used to reconstruct surgical wounds. The graft is composed of epidermal and dermal segments that are completely removed from the donor region and transferred to the recipient bed. After its implantation it’s recommended to make compressive dressing in the receiver bed. Since the grafts do not have a vascular pedicle, it’s important to make the compressive dressing to improve graft contact with the wound and allow adequate angiogenesis. The compressive dressing is made with a sponge or foam, which offers adequate protection and reduces the discomfort of the patient in the postoperative period. The use of platelet-rich plasma (PRP) is the objective of several studies associated with the reduction of postoperative surgical complications, especially necrosis. This product is a result of the centrifugation of the patient’s blood that promotes the separation of its constituents and allows the extraction of plasma with higher concentration of platelets. PRP improves the tissue healing process by releasing biological mediators and growth factors at the site of application. Researches on platelet-rich plasma used in reconstructive surgery are important because this product has therapeutic characteristics to promote healing. When it’s used in skin grafts, platelet-rich plasma is able to improve graft integration in the recipient bed, and reduce necrosis after the surgical procedure. The use of postoperative surgical sponges associated with platelet-rich plasma is indicated to improve the healing of the graft and to avoid its displacement of the recipient bed.
    Type of Medium: Online Resource
    ISSN: 1916-9760 , 1916-9752
    Language: Unknown
    Publisher: Canadian Center of Science and Education
    Publication Date: 2017
    detail.hit.zdb_id: 2501913-2
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  • 9
    Online Resource
    Online Resource
    Elsevier BV ; 2001
    In:  Cancer Genetics and Cytogenetics Vol. 131, No. 1 ( 2001-11), p. 54-59
    In: Cancer Genetics and Cytogenetics, Elsevier BV, Vol. 131, No. 1 ( 2001-11), p. 54-59
    Type of Medium: Online Resource
    ISSN: 0165-4608
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2001
    detail.hit.zdb_id: 2004205-X
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  • 10
    In: Journal of Personalized Medicine, MDPI AG, Vol. 12, No. 2 ( 2022-01-29), p. 181-
    Abstract: The genus Helicobacter is composed of bacteria that colonize both the human and animal gastrointestinal tract. Helicobacter pylori infects half of the world’s population, causing various disorders, such as gastritis, duodenitis and gastric cancer. Additionally, non-Helicobacter pylori Helicobacter species (NHPH) are commonly found in the stomach of pigs, dogs and cats. Most of these species have zoonotic potential and prevalence rates of 0.2–6.0%, and have been described in human patients suffering from gastric disorders undergoing a gastric biopsy. The aim of this study was to determine the occurrence of Helicobacter spp. in the stomach of patients with gastric cancer (n = 17) and obese (n = 63) patients. Furthermore, the outcome of the Helicobacter eradication treatment and the current infection status was evaluated. Overall, based on the genus-specific PCR followed by sequencing, DNA from Helicobacter spp. was detected in 46.3% of the patients, including single infections with H. pylori in 43.8% of the patients and mixed infections with H. pylori and canine- or feline-associated H. felis in 2.5%. About 32.5% of the patients had been subjected to previous Helicobacter eradication therapy and the triple standard therapy was the most frequent scheme (42.3%). In 48.0% of the patients who received eradication treatment, bacteria were still detected, including one mixed infection. In 23.1% of the patients who reported that a subsequent test had been performed to confirm the elimination of the bacteria, Helicobacter were still detected. In conclusion, although in a smaller percentage, NHPH may also be present in the human stomach. Thus, specific NHPH screening should be included in the diagnostic routine. The continued presence of H. pylori in the stomach of patients recently subjected to eradication schemes raises questions about the efficacy of the current Helicobacter treatments.
    Type of Medium: Online Resource
    ISSN: 2075-4426
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2662248-8
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