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  • 1
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), ( 2023-08-28)
    Abstract: Penile squamous cell carcinomas (PCs) are rare malignancies with a dismal prognosis in a metastatic setting; therefore, novel immunotherapeutic modalities are an unmet need. One such modality is the immune checkpoint molecule programmed cell death ligand 1 (PD-L1). We sought to analyze PD-L1 expression and its correlation with various clinicopathologic parameters in a contemporary cohort of 134 patients with PC. Methods A cohort of 134 patients with PC was studied for PD-L1 immunohistochemistry. The PD-L1 expression was evaluated using a combined proportion score with a cutoff of 1 or higher to define positivity. The results were correlated with various clinicopathologic parameters. Results Overall, 77 (57%) patients had positive PD-L1 expression. Significantly high PD-L1 expression was observed in high-grade tumors (P = .006). We found that 37% of human papillomavirus (HPV)–associated subtypes and 73% of other histotype tumors expressed PD-L1, while 63% of HPV-associated tumors and 27% of other histotype tumors did not (odds ratio, 1.35; P = .002 when compared for HPV-associated groups vs all others). Similarly, PD-L1–positive tumors had a 3.61-times higher chance of being node positive than PD-L1–negative tumors (P = .0009). In addition, PD-L1 high–positive tumors had a 5-times higher chance of being p16ink4a negative than PD-L1 low–positive tumors (P = .004). The PD-L1–positive tumors had a lower overall survival and cancer-specific survival than PD-L1–negative tumors. Conclusions Overall, PD-L1 expression is associated with high-grade and metastatic tumors. Lower PD-L1 expression is observed more frequently in HPV-associated (warty or basaloid) subtypes than in other, predominantly HPV-independent types. As a result, PD-L1 positivity, including higher expression, portends lower overall and cancer-specific survival. These data provide a rational for further investigating PD-L1–based immunotherapeutics in PC.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2039921-2
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  • 2
    In: SSRN Electronic Journal, Elsevier BV
    Type of Medium: Online Resource
    ISSN: 1556-5068
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
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  • 3
    Online Resource
    Online Resource
    IOP Publishing ; 2020
    In:  IOP Conference Series: Materials Science and Engineering Vol. 872, No. 1 ( 2020-06-01), p. 012045-
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 872, No. 1 ( 2020-06-01), p. 012045-
    Abstract: In this digital world, encryption plays an important role in various domains. Securing the information is the main goal when transfer of information takes place. Image encryption is a very important part of this as it applies to various domains like medical, multimedia, defence etc. A new method for image encryption is proposed here taking into account the “confusion-diffusion” structure. While working with secure data, requirements like fast computation, compression and processing are important issues. Deoxyribonucleic Acid (DNA) encoding has the capability to cope up with this requirement. In this paper a new algorithm is proposed based on composite chaos map for pixel scrambling and hence image encryption. First the algorithm takes the image and XORs with a composite chaotic map which further goes into dynamic DNA encoding followed by pixel scrambling which results in the image being very random thus it becomes less prone to attacks. The method discussed performs efficiently as shown in the experimental results.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2506501-4
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  • 4
    In: Health Science Reports, Wiley, Vol. 6, No. 9 ( 2023-09)
    Abstract: Historically, a critical aetiological agent of health concern stays till eternity after its discovery, so shall it be with the COVID‐19 outbreak. It has transformed human life to a ‘new normal’ with huge tolls on the social, psychological, intellectual and financial spheres. Aim This perspective aimed to collate numerous reported COVID‐19 vaccine‐associated adverse events and the predisposing factors. It focussed on the efficacy of mix‐n‐match (cocktail) vaccines to effectively counter COVID‐19 infection to facilitate future research and possible interventions. Material and Methods Databases like Scopus, Pubmed and the Web‐of‐science were searched for published literature on ‘adverse events associated with COVID‐19 vaccine’. The reports and updates from health agencies like the WHO and CDC were also considered for the purpose. The details with respect to the adverse events associated with COVID‐19 vaccination and the predisposing factors were compiled to obtain insights and suggest possible future directions in vaccine research. Results India stood strong to manage its health resources in time and turned into a dominant global vaccine supplier at a time when healthcare infrastructure of many countries was still significantly challenged. Developing indigenous vaccines and the vaccination drive in India were its major achievements during the second and the subsequent COVID‐19 waves. The fully indigenous Covaxin vaccine, primarily as an emergency intervention, was successfully rapidly launched. Similar such vaccines for emergency use were developed elsewhere as well. However, all of these reached the marketplace with a ‘emergency use only’ tag, without formal clinical trials and other associated formalities to validate and verify them as these would require much longer incubation time before they are available for human use. Discussion Many adverse events associated with either the first or the second/booster vaccination doses were reported. Evidently, these associated adverse events were considered as ‘usually rare’ or were often underreported. Without the additional financial or ethical burden on the vaccine companies, fortunately, the Phase IV (human) clinical trials of their manufactured vaccines are occurring by default as the human population receives these under the tag ‘emergency use’. Thus, focused and collaborative strategies to unveil the molecular mechanisms in vaccine‐related adverse events in a time‐bound manner are suggested. Conclusion Reliable data particularly on the safety of children is lacking as majority of the current over‐the‐counter COVID‐19 vaccines were for emergency use. Many of these were still in their Phase III and Phase IV trials. The need for a mutant‐proof, next‐gen COVID‐19 vaccine in the face of vaccine‐associated adverse events is opined.
    Type of Medium: Online Resource
    ISSN: 2398-8835 , 2398-8835
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2927182-4
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  • 5
    Online Resource
    Online Resource
    Wiley ; 2012
    In:  Environmental Toxicology Vol. 27, No. 7 ( 2012-07), p. 415-422
    In: Environmental Toxicology, Wiley, Vol. 27, No. 7 ( 2012-07), p. 415-422
    Abstract: Exposure to sublethal hexavalent chromium (as 2 and 4 mg L −1 potassium dichromate for 1 and 2 months) during late preparatory to mid prespawning phase of annual reproductive cycle severely affected the pituitary‐ovarian axis of a teleost Channa punctatus . Gonadosomatic index (GSI), ovarian histopathology, immunocytochemistry of the pituitary gonadotrophs (LHβ‐immunoreactive cells), and serum 17β‐estradiol level revealed distinct dose and duration‐dependent effects. Gonadosomatic index was declined. Diameter of ovary as well as ovarian follicles was reduced along with a distinct variation in the percentage of follicles. The greater percentage of previtellogenic follicles (stage I) and decline in vitellogenic ones (stage II and stage III) compared to control indicated the arrest of follicular development. The percentage of atretic follicles was also increased indicating toxic impact of metal on ovary. Decreased serum level of ovarian steroid 17β‐estradiol further indicated the same. Chromium interference of the pituitary was demonstrated as atrophy and less immunointensity of LH‐immunoreactive gonadotrophs. Thus, the hexavalent chromium impaired the pituitary‐ovarian axis affecting at the sites of both pituitary and ovary. © 2010 Wiley Periodicals, Inc. Environ Toxicol, 2012.
    Type of Medium: Online Resource
    ISSN: 1520-4081 , 1522-7278
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2027534-1
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  • 6
    Online Resource
    Online Resource
    Elsevier BV ; 2009
    In:  Science of The Total Environment Vol. 407, No. 18 ( 2009-9), p. 5031-5038
    In: Science of The Total Environment, Elsevier BV, Vol. 407, No. 18 ( 2009-9), p. 5031-5038
    Type of Medium: Online Resource
    ISSN: 0048-9697
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2009
    detail.hit.zdb_id: 1498726-0
    detail.hit.zdb_id: 121506-1
    SSG: 12
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  • 7
    In: American Journal of Nephrology, S. Karger AG, Vol. 47, No. 6 ( 2018), p. 376-384
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 Cortical bone is a significant determinant of bone strength and its deterioration contributes to bone fragility. Thin cortices and increased cortical porosity have been noted in patients with chronic kidney disease (CKD), but the “Turnover Mineralization Volume” classification of renal osteodystrophy does not emphasize cortical bone as a key parameter. We aimed to assess trabecular and cortical bone microarchitecture by histomorphometry and micro-CT in patients with CKD G5 and 5D (dialysis). 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 Transiliac bone biopsies were performed in 14 patients undergoing kidney transplantation ( 〈 i 〉 n 〈 /i 〉 = 12) and parathyroidectomy ( 〈 i 〉 n 〈 /i 〉 = 2). Structural parameters were analysed by histomorphometry and micro-CT including trabecular bone volume, thickness (TbTh), number (TbN) and separation and cortical thickness (CtTh) and porosity (CtPo). Indices of bone remodelling and mineralisation were obtained and relationships to bone biomarkers examined. Associations were determined by Spearman’s or Pearson’s rank correlation coefficients. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 By micro-CT, trabecular parameters were within normal ranges in most patients, but all patients showed very low CtTh (127 ± 44 µm) and high CtPo (60.3 ± 22.5%). CtPo was inversely related to TbN ( 〈 i 〉 r 〈 /i 〉 = –0.56; 〈 i 〉 p 〈 /i 〉 = 0.03) by micro-CT and to TbTh ( 〈 i 〉 r 〈 /i 〉 = –0.60; 〈 i 〉 p 〈 /i 〉 = 0.024) by histomorphometry and correlated to parathyroid hormone values ( 〈 i 〉 r  〈 /i 〉 = 0.62; 〈 i 〉 p 〈 /i 〉 = 0.021). By histomorphometry, bone turnover was high in 50%, low in 21% and normal in 29%, while 36% showed abnormal patterns of mineralization. Significant positive associations were observed between osteoblast surface, osteoclast surface, mineralization surface and bone turnover markers. 〈 b 〉 〈 i 〉 Conclusions: 〈 /i 〉 〈 /b 〉 Deterioration of cortical ­microarchitecture despite predominantly normal trabecular parameters reinforces the importance of comprehensive cortical evaluation in patients with CKD.
    Type of Medium: Online Resource
    ISSN: 0250-8095 , 1421-9670
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2018
    detail.hit.zdb_id: 1468523-1
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  • 8
    Online Resource
    Online Resource
    Elsevier BV ; 2008
    In:  Environmental Toxicology and Pharmacology Vol. 26, No. 2 ( 2008-9), p. 136-141
    In: Environmental Toxicology and Pharmacology, Elsevier BV, Vol. 26, No. 2 ( 2008-9), p. 136-141
    Type of Medium: Online Resource
    ISSN: 1382-6689
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2008
    detail.hit.zdb_id: 2015938-9
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  • 9
    Online Resource
    Online Resource
    Wiley ; 2015
    In:  Environmental Toxicology Vol. 30, No. 6 ( 2015-05-06), p. 621-627
    In: Environmental Toxicology, Wiley, Vol. 30, No. 6 ( 2015-05-06), p. 621-627
    Abstract: Acute exposure to hexavalent chromium (10 mg L −1 , 20 mg L −1 , and 40 mg L −1 potassium dichromate for 96 h) dose‐dependently affected the pituitary–thyroid axis of teleost, Channa punctatus . Significant hypertrophy of the thyroid follicle was observed in 20 mg L −1 and 40 mg L −1 groups; the follicular epithelium was however hypertrophied only in 40 mg L −1 group. The colloid depletion in the lumen of thyroid follicle was evident in 20 mg L −1 and 40 mg L −1 groups. Serum thyroid hormones (thyroxine/T4 and triiodothyronine/T3) level increased significantly at both the higher doses. Increased immunointensity and significant hypertrophy of the pituitary thyrotrophs (anti TSHβ‐immunoreactive cells) was observed in both 20 mg L −1 and 40 mg L −1 chromium‐exposed fish. The increased thyroid hormones secretion observed in this study might be an adaptive response of the pituitary–thyroid axis under acute chromium‐induced stress condition to maintain homeostasis. The long‐term Cr(VI) exposures, however, may lead to attenuation/exhaustion of the pituitary–thyroid axis and pose serious threat to fish health and affect their population. © 2013 Wiley Periodicals, Inc. Environ Toxicol 30: 621–627, 2015.
    Type of Medium: Online Resource
    ISSN: 1520-4081 , 1522-7278
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2027534-1
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  • 10
    Online Resource
    Online Resource
    Wiley ; 2014
    In:  Environmental Toxicology Vol. 29, No. 7 ( 2014-05), p. 733-739
    In: Environmental Toxicology, Wiley, Vol. 29, No. 7 ( 2014-05), p. 733-739
    Abstract: Acute exposure to hexavalent chromium (as 10, 20, and 40 mg/L potassium dichromate for 96 h) adversely affected the pituitary‐ovarian axis of a teleost Channa punctatus . The toxic impact of metal exposure on fish ovary was revealed in the form of increased percentage of atretic follicles, significantly in 20 mg/L and 40 mg/L exposure groups. The follicular atresia mostly occurred in vitellogenic (stage II and stage III) oocytes. Reduction of serum level of 17β‐estradiol was also significant in 20 mg/L and 40 mg/L exposure groups. The increase of LH‐immunointensity of pituitary gonadotrophs (LHβ‐immunoreactive cells) and their hypertrophy was evident, significantly in fish of 40 mg/L exposed group. Thus, the present acute metal spill‐mimicking laboratory study clearly demonstrated that short‐term exposures to high doses of hexavalent chromium may disrupt reproduction of the fish and affect their population. © 2012 Wiley Periodicals, Inc. Environ Toxicol 29: 733–739, 2014.
    Type of Medium: Online Resource
    ISSN: 1520-4081 , 1522-7278
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2027534-1
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