scholarly journals PCR-based identification of Mycobacterium murphy causing Canine Leproid Granuloma Syndrome in Niterói, southeast Brazil - case report

2018 ◽  
Vol 70 (6) ◽  
pp. 1699-1702
Author(s):  
M.A.A. Pereira ◽  
V. Nowosh ◽  
P.N. Suffys ◽  
G.B. Queiroz ◽  
K.M.O. Silva ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Rio De Janeiro ◽  
Skin Diseases ◽  
Pcr Amplification ◽  
Infectious Agent ◽  
Skin Lesions ◽  
Molecular Techniques ◽  
Hsp65 Gene ◽  
Janeiro State

ABSTRACT Canine Leproid Granuloma Syndrome (CLGS), also known as canine leprosy, is a cutaneous nodular infectious disease caused by Mycobacterium sp.. Despite being reported worldwide, it is still quite unknown and underdiagnosed. Diagnosis may be achieved by cytopathology or histopathology of skin lesions, but identification of the infectious agent is complex, since bacterial in vitro growth is not possible, relying upon molecular techniques such as PCR to confirm Mycobacterium DNA in the sample. We report a CLGS case in Niteroi, Rio de Janeiro state, Brazil, diagnosed by cytopathology and submitted to molecular identification of the agent. PCR amplification of hsp65 gene was performed and revealed 100% genetic homology to M. murphy strain. This is the first CLGS report with molecular identification in Rio de Janeiro state, and this finding should raise awareness about CLGS as a differential diagnosis among granulomatous skin diseases in this region.

scholarly journals Basophil Recruitment to Skin Lesions of Patients with Systemic Lupus Erythematosus Mediated by CCR1 and CCR2

2017 ◽  
Vol 43 (2) ◽  
pp. 832-839 ◽  
Author(s):  
Qingjun Pan ◽  
Yongmin Feng ◽  
Yanxia Peng ◽  
Hongjiu Zhou ◽  
Zhenzhen Deng ◽  
...  
Keyword(s):  
Systemic Lupus Erythematosus ◽  
Lupus Erythematosus ◽  
Migration Rate ◽  
Skin Diseases ◽  
Normal Skin ◽  
Flow Cytometric Analysis ◽  
Skin Lesions ◽  
Skin Tissue ◽  
Systemic Lupus

Background/Aims: Basophils have been reported to infiltrate skin lesions in various skin diseases, but not in systemic lupus erythematosus (SLE). This study investigated basophil infiltration in SLE and its mechanism. Methods: Twenty newly diagnosed SLE patients and twenty healthy controls were enrolled. Nine SLE patients underwent skin biopsies. Flow cytometric analysis the phenotype of peripheral basophils and their migration rate toward RANTES and MCP-1 were analyzed with the transwell culture system, also the expression of these two chemokines in skin tissue were analyzed with immunohistochemistry. Results: Increased activation and decreased numbers of peripheral basophils were observed in SLE patients compared with controls. Basophil migration into skin lesions of SLE patients were observed, but not in normal skin tissue. This migration was related to the upregulation of chemokine receptors CCR1 and CCR2 on basophils. In vitro studies showed that migration rate toward RANTES and MCP-1 increased significantly in basophils from SLE patients compared with those from controls. Consistently, high levels of RANTES and MCP-1 expression were observed in skin lesions from SLE patients but not in normal skin tissue. Conclusion: Basophil recruitment to skin lesions of SLE patients mediated by CCR1 and CCR2, which may contribute to tissue damage in SLE.

scholarly journals ZnO NPs delay the recovery of psoriasis-like skin lesions through promoting inflammation and keratinocyte apoptosis via nuclear translocation of phosphorylated NF-κB p65 and cysteine deficiency

2020 ◽  
Author(s):  
Xuan Lai ◽  
Menglei Wang ◽  
Yixia Zhu ◽  
Xiaoli Feng ◽  
Huimin Liang ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Nuclear Translocation ◽  
Normal Skin ◽  
Redox Homeostasis ◽  
Skin Lesions ◽  
Zno Nps ◽  
Inflammatory Skin Diseases ◽  
Tnf Α ◽  
Jnk Inhibitors

Abstract Background This study aimed to confirm the safety and risk of applying zinc oxide nanoparticles (ZnO NPs) to pathological skin, such as psoriasis-like skin. The majority of previous studies confirmed the safety of applying ZnO NPs to normal skin. However, we know very little about the risks of using sunscreen, cosmetics and topical drugs containing ZnO NPs for individuals with skin diseases. In addition, some studies claimed that ZnO NPs can penetrate normal or pathological skin, and ZnO NPs have frequently been reported to have proinflammatory and lethal effects in vitro. Therefore, it is necessary to evaluate the safety of applying ZnO NPs to pathological skin. Results ZnO NPs passed through gaps between keratinocytes and entered stratum basale of epidermis and dermis in imiquimod (IMQ)-induced psoriasis-like skin lesions. Application of a ZnO NP-containing suspension for 3 connective days delayed the healing of the epidermal barrier; increased the expression levels of inflammatory cytokines; promoted keratinocyte apoptosis and disturbed redox homeostasis. In vitro, ZnO NPs promoted TNF-α, IL-1β and IL-6 secretion and apoptosis of recombinant-human-TNF-α-stimulated HaCaT cells. NF-κB, ERK, p38 and JNK inhibitors blocked ZnO NP-induced inflammation. JSH-23, an inhibitor of the nuclear translocation of p-NF-κB p65, and NAC, an acetylated precursor of L-cysteine, not only inhibited the ZnO NP-induced inflammation but also inhibited apoptosis and cysteine deficiency. Neither erastin nor RSL3 induced p-NF-κB p65 nuclear translocation, but they did reduce cysteine biosynthesis. Additionally, ferropstatin-1, an inhibitor of lipid peroxidation, partially rescued ZnO NP-induced decreases in cell viability and cysteine content. Conclusions ZnO NPs delay the recovery of psoriasis-like skin lesions through promoting inflammation and keratinocyte apoptosis via the nuclear translocation of phosphorylated NF-κB p65 and cysteine deficiency. This work reminds the public that ZnO NPs are not safe for pathological skin, especially in inflammatory skin diseases such as psoriasis, and has revealed a partial mechanism by which ZnO NPs delay the recovery of pathological skin, promoting the appropriate use of ZnO NPs.

scholarly journals Three Constituents of Moringa oleifera Seeds Regulate Expression of Th17-Relevant Cytokines and Ameliorate TPA-Induced Psoriasis-Like Skin Lesions in Mice

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3256 ◽  
Author(s):  
Nuan Ma ◽  
Qin Tang ◽  
Wan-Ting Wu ◽  
Xin-An Huang ◽  
Qin Xu ◽  
...  
Keyword(s):  
Moringa Oleifera ◽  
Skin Diseases ◽  
Critical Role ◽  
Folk Medicine ◽  
Skin Lesions ◽  
Keratinocyte Differentiation ◽  
Therapeutic Application ◽  
Differentiation Markers

As a folk medicine, Moringa oleifera L. is used effectively to treat inflammatory conditions and skin diseases. However, its mechanism of action is not well understood, limiting its medical use. We isolated and identified three compounds, namely niazirin, marumoside A and sitosterol-3-O-β-d-glucoside, from the seeds of Moringa oleifera, and studied their effects on the expression of Th17-relevant cytokines (IL-12/IL-23 p40, IL-17A, IL-22 and IL-23 p19) using lipopolysaccharide-stimulated THP-1 cells. Additionally, as Th17 plays a critical role in the pathogenesis of psoriasis, we used a 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced psoriasis-like skin lesion mouse model to study their potential therapeutic application in vivo. The compounds suppressed the expression of IL-12/IL-23 p40, IL-17A, IL-22 and IL-23 p19 in vitro, and in vivo they ameliorated psoriasis-like skin lesions, decreased IL-17A mRNA expression, and increased the expression of keratinocyte differentiation markers. To our knowledge, this is the first report regarding the mechanism and therapeutic application of Moringa oleifera seeds to treat psoriasis-like lesions in vivo.

scholarly journals Morphobiological, morphometric and ultrastructural characterization of sylvatic Trypanosoma cruzi isolates from Rio de Janeiro state, Brazil

2019 ◽  
Vol 79 (2) ◽  
pp. 294-303 ◽  
Author(s):  
C. Santos da Silva ◽  
A. L. Carbajal-de-la-Fuente ◽  
C. E. Almeida ◽  
T. C. M. Gonçalves ◽  
J. Reis dos Santos-Mallet
Keyword(s):  
Trypanosoma Cruzi ◽  
Rio De Janeiro ◽  
Natural Infection ◽  
Growth Curves ◽  
Maximum Growth ◽  
Ultrastructural Characterization ◽  
High Prevalence ◽  
Janeiro State

Abstract Triatoma vitticeps is a triatomine with geographic distribution restrict to Brazil, which exhibits high prevalence of Trypanosoma cruzi natural infection. Of special epidemiologic concern, this species often invades households in the states of Rio de Janeiro, Minas Gerais and Espírito Santo. The objective of this study was to evaluate morphological and ultrastructural parameters on three T. cruzi isolates obtained from wild T. vitticeps specimens. The growth and cell differentiation of the parasite was evaluated through epimastigote and trypomastigote forms obtained in the growth curves for three distinct isolates. The maximum growth showed differences at the 20th day of the curve. Our in vitro results show a heterogeneity, regarding these features for samples cultivated under the same conditions. Morphometric analyzes based on the shape of epimastigotes and trypomastigotes corroborated such differentiation. These results highlight the need of better understanding the meaning of this diversity under an eco-epidemiological perspective.

scholarly journals Characterization of Staphylococcus aureus Isolates from Buffalo, Bovine, Ovine, and Caprine Milk Samples Collected in Rio de Janeiro State, Brazil

2007 ◽  
Vol 73 (12) ◽  
pp. 3845-3849 ◽  
Author(s):  
Marta Aires-de-Sousa ◽  
Carlos E. S. R. Parente ◽  
Olney Vieira-da-Motta ◽  
Isabel C. F. Bonna ◽  
Denise A. Silva ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Rio De Janeiro ◽  
Animal Species ◽  
Subclinical Mastitis ◽  
Molecular Techniques ◽  
Dairy Herds ◽  
Milk Samples ◽  
Caprine Milk ◽  
Major Clone ◽  
Janeiro State

ABSTRACT Eighty-four staphylococcal isolates were obtained from milk samples from cows, sheep, goats, and buffalo with subclinical mastitis and from colonization samples from ostriches. The animals were hosted in 18 small dairy herds and an ostrich breeding located in 10 municipalities of the state of Rio de Janeiro, Brazil. Thirty isolates were identified as Staphylococcus aureus by biochemical and molecular techniques and were comparatively characterized by phenotypic and genotypic methods. The molecular characterization by pulsed-field gel electrophoresis (PFGE), spa typing, and multilocus sequence typing (MLST) revealed five clonal types (PFGE A, spa type t359, sequence type 747 [ST747]; PFGE B, spa type t1180, ST750; PFGE C, spa type t605, ST126; PFGE D, spa type t127, ST751; and PFGE F, spa type t002, ST5). None of the isolates harbored the Panton-Valentine leukocidin or exfoliative toxin D gene. The detection of major clone A (in 63% of the isolates) in different herds, among all animal species studied, and in infection and colonization samples evidenced its geographical spread among Rio de Janeiro State and no host preference among the animal species. Comparison with S. aureus from a human origin suggested that all but one clone found in the present study might be animal specific.

scholarly journals miR-155 Contributes to Normal Keratinocyte Differentiation and Is Upregulated in the Epidermis of Psoriatic Skin Lesions

2020 ◽  
Vol 21 (23) ◽  
pp. 9288
Author(s):  
Lucian Beer ◽  
Polina Kalinina ◽  
Martin Köcher ◽  
Maria Laggner ◽  
Markus Jeitler ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Normal Skin ◽  
Skin Lesions ◽  
Keratinocyte Differentiation ◽  
Psoriatic Skin ◽  
Bioinformatics Analyses ◽  
Epidermal Barrier ◽  
Barrier Formation

The role of microRNAs (miRNAs) during keratinocyte (KC) differentiation and in skin diseases with epidermal phenotypes has attracted strong interest over the past few years. However, combined mRNA and miRNA expression analyses to elucidate the intricate mRNA–miRNA networks of KCs at different stages of differentiation have not been performed yet. In the present study, we investigated the dynamics of miRNA and mRNA expression during KC differentiation in vitro and in normal and psoriatic epidermis. While we identified comparable numbers of up- and downregulated mRNAs (49% and 51%, respectively), miRNAs were predominantly upregulated (76% vs 24%) during KC differentiation. Further bioinformatics analyses suggested an important inhibitory role for miR-155 in KC differentiation, as it was repressed during KC differentiation in normal skin but strongly upregulated in the epidermis of psoriatic skin lesions. Mimicking the inflammatory milieu of psoriatic skin in vitro, we could show that the pro-inflammatory cytokines IL17, IL1β and INFγ synergistically upregulated miR-155 expression in KCs. Forced over-expression of miR-155 in human in vitro skin models specifically reduced the expression of loricrin (LOR) in KCs, indicating that miR-155 interferes with the establishment of a normal epidermal barrier. Together, our data indicate that downregulation of miR-155 during KC differentiation is a crucial step for epidermal barrier formation. Furthermore, its strong upregulation in psoriatic lesions suggests a contributing role of miR-155 in the altered keratinocyte differentiation observed in psoriasis. Therefore, miR-155 represents as a potential target for treating psoriatic skin lesions.

scholarly journals Molecular Identification of Vibrio alginolyticus Causing Vibriosis in Shrimp and Its Herbal Remedy

2019 ◽  
Vol 68 (4) ◽  
pp. 429-438 ◽  
Author(s):  
MD. ABDUL HANNAN ◽  
MD. MAHBUBUR RAHMAN ◽  
MD. NURUNNABI MONDAL ◽  
SUZAN CHANDRA DEB ◽  
GAZLIMA CHOWDHURY ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Herbal Remedy ◽  
Challenge Test ◽  
Molecular Techniques ◽  
Rrna Gene ◽  
Syzygium Aromaticum ◽  
Herbal Extracts ◽  
Immersion Method

Penaeus monodon is highly susceptible to vibriosis disease. Aims of the study were to identify the pathogen causing vibriosis in P. monodon through molecular techniques and develop a biocontrol method of the disease by application of herbal extracts. Shrimp samples were col¬lected aseptically from the infected farm and the bacteria were isolated from the infected region of those samples. Based on phenotypic identification, several isolates were identified as Vibrio sp. 16S rRNA gene sequences of the selected isolates exhibited 100% homology with V. alginolyticus strain ATCC 17749. An in vivo infection challenge test was performed by immersion method with V. alginolyticus where these isolates caused high mortality in juvenile shrimp with prominent symptoms of hepatopancreatic necrosis. Antibiogram profile of the isolates was determined against eleven commercial antibiotic discs whereas the isolates were found resistant to multiple antibiotics. A total of twenty-one herbal extracts were screened where Emblica officinalis, Allium sativum, and Syzygium aromaticum strongly inhibited the growth of V. alginolyticus in in vitro conditions. In in vivo conditions, the ethyl acetate extracts of E. officinalis and A. sativum successfully controlled the vibriosis disease in shrimp at a dose of 10 mg/g feed. This is the first report on molecular identification and biocontrol of V. alginolyticus in shrimp in Bangladesh.

scholarly journals FIRST REPORT OF ACUTE CHAGAS DISEASE BY VECTOR TRANSMISSION IN RIO DE JANEIRO STATE, BRAZIL

2015 ◽  
Vol 57 (4) ◽  
pp. 361-364 ◽  
Author(s):  
Luiz Henrique Conde SANGENIS ◽  
Andréa Silvestre DE SOUSA ◽  
Gilberto Marcelo SPERANDIO DA SILVA ◽  
Sérgio Salles XAVIER ◽  
Carolina Romero Cardoso MACHADO ◽  
...  
Keyword(s):  
Case Report ◽  
Chagas Disease ◽  
Rio De Janeiro ◽  
Skin Lesions ◽  
Vector Transmission ◽  
Left Wrist ◽  
Triatomine Bugs ◽  
Means Of Transmission ◽  
Acute Chagas Disease ◽  
Janeiro State

SUMMARY Chagas disease (CD) is an endemic anthropozoonosis from Latin America of which the main means of transmission is the contact of skin lesions or mucosa with the feces of triatomine bugs infected by Trypanosoma cruzi. In this article, we describe the first acute CD case acquired by vector transmission in the Rio de Janeiro State and confirmed by parasitological, serological and PCR tests. The patient presented acute cardiomyopathy and pericardial effusion without cardiac tamponade. Together with fever and malaise, a 3 cm wide erythematous, non-pruritic, papule compatible with a "chagoma" was found on his left wrist. This case report draws attention to the possible transmission of CD by non-domiciled native vectors in non-endemic areas. Therefore, acute CD should be included in the diagnostic workout of febrile diseases and acute myopericarditis in Rio de Janeiro.

scholarly journals Cutaneous leishmaniasis in frequent in equines from an endemic area in Rio de Janeiro, Brazil

1986 ◽  
Vol 81 (4) ◽  
pp. 471-472 ◽  
Author(s):  
Cruz Manuel Aguilar ◽  
Elizabeth Ferreira Rangel ◽  
Leonidas M. Deane
Keyword(s):  
Cutaneous Leishmaniasis ◽  
Human Disease ◽  
Rio De Janeiro ◽  
Endemic Area ◽  
Skin Lesions ◽  
Systematic Search ◽  
Leishmania Parasites ◽  
Janeiro State

In an endemic area of cutaneous leishmaniasis in Rio de Janeiro State where a mule had been found infected, a systematic search among equines was performed, resulting in the detection of Leishmania parasites in skin lesions of 30.8% of the animals, which included horses and mules. The eventual role of equines in the epidemiology of the human disease is being investigated.

scholarly journals Collagen-Carboxymethylcellulose Biocomposite Wound-Dressings with Antimicrobial Activity

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1153
Author(s):  
Ionela Andreea Neacsu ◽  
Sorina-Alexandra Leau ◽  
Stefania Marin ◽  
Alina Maria Holban ◽  
Bogdan-Stefan Vasile ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Skin Diseases ◽  
Chemical Characterization ◽  
Antimicrobial Effect ◽  
Skin Lesions ◽  
Wound Dressings ◽  
In Vitro Tests ◽  
Absorption Bands ◽  
Freeze Dried

Microbial infections associated with skin diseases are frequently investigated since they impact on the progress of pathology and healing. The present work proposes the development of freeze-dried, glutaraldehyde cross-linked, and non-cross-linked biocomposite dressings with a porous structure, which may assist the reepithelization process through the presence of collagen and carboxymethylcellulose, along with a therapeutic antimicrobial effect, due to silver nanoparticles (AgNPs) addition. Phisyco-chemical characterization revealed the porous morphology of the obtained freeze-dried composites, the presence of high crystalline silver nanoparticles with truncated triangular and polyhedral morphologies, as well as the characteristic absorption bands of collagen, silver, and carboxymethylcellulose. In vitro tests also assessed the stability, functionality, and the degradability rate of the obtained wound-dressings. Antimicrobial assay performed on Gram-negative (Escherichia coli), Gram-positive (Staphyloccocus aureus) bacteria, and yeast (Candida albicans) models demonstrated that composite wound dressings based on collagen, carboxymethylcellulose, and AgNPs are suitable for skin lesions because they prevent the risk of infection and have prospective wound healing capacity. Moreover, the cell toxicity studies proved that the obtained materials can be used in long time treatments, with no cytotoxic effects.

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