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  • 1
    In: Science Immunology, American Association for the Advancement of Science (AAAS), Vol. 5, No. 46 ( 2020-04-03)
    Abstract: It is well established that tissue macrophages and tissue-resident memory CD8 + T cells (T RM ) play important roles for pathogen sensing and rapid protection of barrier tissues. In contrast, the mechanisms by which these two cell types cooperate for homeostatic organ surveillance after clearance of infections is poorly understood. Here, we used intravital imaging to show that T RM dynamically followed tissue macrophage topology in noninflamed murine submandibular salivary glands (SMGs). Depletion of tissue macrophages interfered with SMG T RM motility and caused a reduction of interepithelial T cell crossing. In the absence of macrophages, SMG T RM failed to cluster in response to local inflammatory chemokines. A detailed analysis of the SMG microarchitecture uncovered discontinuous attachment of tissue macrophages to neighboring epithelial cells, with occasional macrophage protrusions bridging adjacent acini and ducts. When dissecting the molecular mechanisms that drive homeostatic SMG T RM motility, we found that these cells exhibit a wide range of migration modes: In addition to chemokine- and adhesion receptor–driven motility, resting SMG T RM displayed a remarkable capacity for autonomous motility in the absence of chemoattractants and adhesive ligands. Autonomous SMG T RM motility was mediated by friction and insertion of protrusions into gaps offered by the surrounding microenvironment. In sum, SMG T RM display a unique continuum of migration modes, which are supported in vivo by tissue macrophages to allow homeostatic patrolling of the complex SMG architecture.
    Type of Medium: Online Resource
    ISSN: 2470-9468
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2020
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  • 2
    In: Dermatology, S. Karger AG, Vol. 235, No. 4 ( 2019), p. 340-345
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 More epidemiological data about lentigo maligna melanoma (LMM) are required to define follow-up guidelines. The study focused on recurrence, progression, and overall survival of LMM managed with primary wide local excision. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 In a 23-year retrospective study (1994 to 2016), a cohort of patients with LMM was evaluated by collecting data about the tumor location, the Breslow depth, the presence of ulceration, and patients’ age and sex. Local recurrences, locoregional and distant metastases, and disease-free and overall survival were additionally assessed. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 Overall, 150 cases (84 male, 66 female, mean age 71.3 ± 11.3 years) of single, localized, primary LMM with a mean follow-up of 6.6 ± 4.4 years were included. A total of 33 (22.2%) patients underwent sentinel lymph node biopsy (SLNB) during surgical excision. However, positive SLNB was detected in none of them. The multivariable Cox analysis indicated that age of diagnosis and male gender significantly influenced the overall survival, while a shorter disease-free survival could be correlated with a greater Breslow thickness. The metastatic potential turned out to be low, entailing 7 deaths in the context of the LMM. 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 Male gender, age over 70 at diagnosis, and a Breslow thickness greater than 0.75 mm were associated with a statistically significant decrease in overall disease-free survival in the current study. The results of the study confirm the favorable outcome of LMM. However, diagnosed patients should undertake regular follow-ups. The intensity of follow-up in these patients can be individualized based on the probability of recurrence/metastasis and overall survival. Furthermore, the study showed that SLNB might not be a necessary staging procedure in patients with LMM.
    Type of Medium: Online Resource
    ISSN: 1018-8665 , 1421-9832
    RVK:
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2019
    detail.hit.zdb_id: 1482189-8
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  • 3
    In: Microsurgery, Wiley, Vol. 38, No. 6 ( 2018-09), p. 627-633
    Abstract: Despite various exisiting monitoring methods, there is still a need for new technologies to improve the quality of post‐operative evaluation of digital replantation. The purpose of the study is using a laser Doppler imaging device (Easy‐LDI) as an additional tool to assess perfusion. In this method, the changes in the frequency of the laser ligth provide information regarding perfusion of the monitored tissue. Patients and Methods This study included seven patients (10 fingers; age of patients: 21–57 years) who suffered from a total ( n  = 6) or subtotal amputation ( n  = 4) due to accidents. In addition to hourly standard monitoring with clinical evaluation and skin thermometry, revascularized fingers were hourly monitored with Easy LDI for 48 h. Results LDI measurement values ranged between 0.8 and 223 (mean 90.62 ± 21.42) arbitrary perfusion units (APU). The mean LDI values before and after revascularization were 7.1 ± 2.85 and 65.30 ± 30.83 APU, respectively. For the successful revascularized fingers (8 of 10 fingers) values from 19 to 223 APU (mean 98.52 ± 15.48) were demonstrated. All of the replants survived, but due to venous occlusion two digits required revision 12 and 35 h after revascularization, respectively. In the two cases, Easy‐LDI also showed a constant and slow decline of the perfusion values. Furthermore, Pearson normalized correlation coefficient showed a positive significant correlation between temperatures of the replants and LDI‐values ( P   〈  .001, r  = +0.392) and a negative significant correlation between Δtemperature and LDI‐values ( P   〈  .001, r  = –0.474). Conclusion The LDI‐device might be a promising additional monitoring technique in detection of perfusion disturbance in monitoring digital replantations.
    Type of Medium: Online Resource
    ISSN: 0738-1085 , 1098-2752
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1475571-3
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  • 4
    Online Resource
    Online Resource
    PiscoMed Publishing Pte. Ltd. ; 2017
    In:  Journal of Surgical Dermatology Vol. 2, No. 3 ( 2017-07-12)
    In: Journal of Surgical Dermatology, PiscoMed Publishing Pte. Ltd., Vol. 2, No. 3 ( 2017-07-12)
    Abstract: Surgical excision is the principal treatment for primary cutaneous melanoma.Selection of optimal excision margins is crucial to maximize outcomes and minimize morbidities.Insufficient resection may lead residual tumor cells to disease recurrences.
    Type of Medium: Online Resource
    ISSN: 2424-9165 , 2424-9084
    Language: Unknown
    Publisher: PiscoMed Publishing Pte. Ltd.
    Publication Date: 2017
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  • 5
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2017
    In:  Plastic & Reconstructive Surgery Vol. 139, No. 5 ( 2017-05), p. 1116e-1127e
    In: Plastic & Reconstructive Surgery, Ovid Technologies (Wolters Kluwer Health), Vol. 139, No. 5 ( 2017-05), p. 1116e-1127e
    Abstract: Despite great understanding of underlying mechanisms for flap necrosis and advances in surgical techniques, flap necrosis remains a critical issue. In the present study, the authors investigated the efficacy of electroporation-mediated hepatocyte growth factor ( HGF ) gene delivery to random dorsal skin flaps (McFarlane) to accelerate wound healing and reduce flap necrosis. Methods: Fifteen male Wistar rats (290 to 320 g) were divided randomly into three groups. Group a, the control group ( n = 5), underwent surgery and received no gene transfer. Group b received electroporation-mediated HGF gene delivery 24 hours after surgery as a treatment. Group c received electroporation-mediated HGF gene delivery 24 hours before surgery as prophylaxis ( n = 5). Planimetry, laser Doppler imaging, and immunohistochemistry were used to assess the efficacy of HGF gene therapy among the groups. Results: Electroporation-mediated HGF gene delivery significantly decreased flap necrosis percentage compared with the control group in prophylactic and treatment groups ( p = 0.0317 and p = 0.0079, respectively) and significantly increased cutaneous perfusion compared with the control group ( p = 0.0317 and p = 0.0159, respectively). Moreover, Spearman rank correlation showed a significant negative correlation between flap necrosis percentage and laser index ( p = 0.0213 and r = −0.5964, respectively). Furthermore, significantly higher mean CD31 + vessel density was detected in treatment and prophylactic groups ( p = 0.0079 and p = 0.0159, respectively). In addition, quantitative image analysis revealed significantly higher HGF protein expression in groups b and c ( p = 0.0079 and p = 0.0079, respectively). Conclusion: These findings suggested in vivo electroporation-mediated HGF gene delivery enhanced viability and vascularity of the ischemic skin flap.
    Type of Medium: Online Resource
    ISSN: 0032-1052
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 2037030-1
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  • 6
    In: Frontiers in Oncology, Frontiers Media SA, Vol. 11 ( 2021-8-12)
    Abstract: Autophagy is a highly conserved cellular process in which intracellular proteins and organelles are sequestered and degraded after the fusion of double-membrane vesicles known as autophagosomes with lysosomes. The process of autophagy is dependent on autophagy-related (ATG) proteins. The role of autophagy in cancer is very complex and still elusive. We investigated the expression of ATG proteins in benign nevi, primary and metastatic melanoma tissues using customized tissue microarrays (TMA). Results from immunohistochemistry show that the expression of ATG5 and ATG7 is significantly reduced in melanoma tissues compared to benign nevi. This reduction correlated with changes in the expression of autophagic activity markers, suggesting decreased basal levels of autophagy in primary and metastatic melanomas. Furthermore, the analysis of survival data of melanoma patients revealed an association between reduced ATG5 and ATG7 levels with an unfavourable clinical outcome. Currently, the mechanisms regulating ATG expression levels in human melanoma remains unknown. Using bioinformatic predictions of transcription factor (TF) binding motifs in accessible chromatin of primary melanocytes, we identified new TFs involved in the regulation of core ATGs. We then show that nuclear respiratory factor 1 (NRF1) stimulates the production of mRNA and protein as well as the promoter activity of ATG5 and ATG7 . Moreover, NRF1 deficiency increased in vitro migration of melanoma cells. Our results support the concept that reduced autophagic activity contributes to melanoma development and progression, and identifies NRF1 as a novel TF involved in the regulation of both ATG5 and ATG7 genes.
    Type of Medium: Online Resource
    ISSN: 2234-943X
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2649216-7
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  • 7
    Online Resource
    Online Resource
    Edizioni Minerva Medica ; 2018
    In:  Giornale Italiano di Dermatologia e Venereologia Vol. 153, No. 6 ( 2018-12)
    In: Giornale Italiano di Dermatologia e Venereologia, Edizioni Minerva Medica, Vol. 153, No. 6 ( 2018-12)
    Type of Medium: Online Resource
    ISSN: 0392-0488 , 1827-1820
    Language: English
    Publisher: Edizioni Minerva Medica
    Publication Date: 2018
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  • 8
    In: Dermatologic Therapy, Hindawi Limited, Vol. 35, No. 2 ( 2022-02)
    Type of Medium: Online Resource
    ISSN: 1396-0296 , 1529-8019
    URL: Issue
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2022
    detail.hit.zdb_id: 2020064-X
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  • 9
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2018
    In:  The Journal of Membrane Biology Vol. 251, No. 2 ( 2018-4), p. 211-219
    In: The Journal of Membrane Biology, Springer Science and Business Media LLC, Vol. 251, No. 2 ( 2018-4), p. 211-219
    Type of Medium: Online Resource
    ISSN: 0022-2631 , 1432-1424
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 1459323-3
    SSG: 12
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  • 10
    In: Dermatology, S. Karger AG, Vol. 238, No. 1 ( 2022), p. 156-160
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 There are no proper management guidelines for nail apparatus melanoma (NAM). 〈 b 〉 〈 i 〉 Objective: 〈 /i 〉 〈 /b 〉 This study aimed to describe the clinical features, the presence of locoregional and distant metastases and disease-free and overall survival of NAM treated at our institution. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 A retrospective cohort review of patients with single, primary localized histopathologically confirmed NAM was performed. Collected data consisted of patients’ characteristics and tumor features. In addition, local recurrence, locoregional metastases, distant metastases, disease-free survival (DFS) and overall survival (OS) were used as the main outcomes in our analysis. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 Thirty patients with NAM were included. The overall survival (OS) in our patients at 5 and 10 years was 85.6 and 73.4%, respectively. DFS was significantly higher in patients with primary tumor location in the hand and without tumor-infiltrating lymphocytes ( 〈 i 〉 p 〈 /i 〉 value = 0.01 and 0.04, respectively). The patients with in situ melanoma or Breslow thickness & #x3c;1 mm had a significantly higher chance of DFS and OS (90.0 and 94.1% at 5 years, respectively) than those with thicker NAM (58.3 and 55.6% at 5 years, respectively). A total of 53.3% of 30 patients underwent primary excision and covering with a full-thickness skin graft, while 13.3% of our 30 patients underwent digit amputation. The patients who underwent excision and covering with a full-thickness skin graft showed a complete overall survival (100% at 5 years). 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 Primary tumor location in the hand and lower tumor thickness might be correlated with better patients’ survival. The study results suggest that total amputation might not be necessary in all NAM cases.
    Type of Medium: Online Resource
    ISSN: 1018-8665 , 1421-9832
    RVK:
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2022
    detail.hit.zdb_id: 1482189-8
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