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Khatami A, Nahand JS, Kiani SJ, Khoshmirsafa M, Moghoofei M, Khanaliha K, Tavakoli A, Emtiazi N, Bokharaei-Salim F. Human papilloma virus (HPV) and prostate cancer (PCa): The potential role of HPV gene expression and selected cellular MiRNAs in PCa development. Microb Pathog 2022; 166:105503. [DOI: 10.1016/j.micpath.2022.105503] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 01/09/2023]
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2
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MicroRNA let-7 and viral infections: focus on mechanisms of action. Cell Mol Biol Lett 2022; 27:14. [PMID: 35164678 PMCID: PMC8853298 DOI: 10.1186/s11658-022-00317-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/26/2022] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs (miRNAs) are fundamental post-transcriptional modulators of several critical cellular processes, a number of which are involved in host defense mechanisms. In particular, miRNA let-7 functions as an essential regulator of the function and differentiation of both innate and adaptive immune cells. Let-7 is involved in several human diseases, including cancer and viral infections. Several viral infections have found ways to dysregulate the expression of miRNAs. Extracellular vesicles (EV) are membrane-bound lipid structures released from many types of human cells that can transport proteins, lipids, mRNAs, and miRNAs, including let-7. After their release, EVs are taken up by the recipient cells and their contents released into the cytoplasm. Let-7-loaded EVs have been suggested to affect cellular pathways and biological targets in the recipient cells, and can modulate viral replication, the host antiviral response, and the action of cancer-related viruses. In the present review, we summarize the available knowledge concerning the expression of let-7 family members, functions, target genes, and mechanistic involvement in viral pathogenesis and host defense. This may provide insight into the development of new therapeutic strategies to manage viral infections.
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Lao Y, Li M, Gao MA, Shao D, Chi C, Huang D, Chakraborty S, Ho T, Jiang W, Wang H, Wang S, Leong KW. HPV Oncogene Manipulation Using Nonvirally Delivered CRISPR/Cas9 or Natronobacterium gregoryi Argonaute. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700540. [PMID: 30027026 PMCID: PMC6051382 DOI: 10.1002/advs.201700540] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 03/01/2018] [Indexed: 05/25/2023]
Abstract
CRISPR/Cas9 technology enables targeted gene editing; yet, the efficiency and specificity remain unsatisfactory, particularly for the nonvirally delivered, plasmid-based CRISPR/Cas9 system. To tackle this, a self-assembled micelle is developed and evaluated for human papillomavirus (HPV) E7 oncogene disruption. The optimized micelle enables effective delivery of Cas9 plasmid with a transient transgene expression profile, benefiting the specificity of Cas9 recognition. Furthermore, the feasibility of using the micelle is explored for another nucleic acid-guided nuclease system, Natronobacterium gregoryi Argonaute (NgAgo). Both systems are tested in vitro and in vivo to evaluate their therapeutic potential. Cas9-mediated E7 knockout leads to significant inhibition of HPV-induced cancerous activity both in vitro and in vivo, while NgAgo does not show significant E7 inhibition on the xenograft mouse model. Collectively, this micelle represents an efficient delivery system for nonviral gene editing, adding to the armamentarium of gene editing tools to advance safe and effective precision medicine-based therapeutics.
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Affiliation(s)
- Yeh‐Hsing Lao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Mingqiang Li
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Madeleine A. Gao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Dan Shao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Chun‐Wei Chi
- Department of Biomedical EngineeringCUNY—City College of New YorkNew YorkNY10031USA
| | - Dantong Huang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | | | - Tzu‐Chieh Ho
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Weiqian Jiang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Hong‐Xia Wang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Sihong Wang
- Department of Biomedical EngineeringCUNY—City College of New YorkNew YorkNY10031USA
| | - Kam W. Leong
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
- Department of Systems BiologyColumbia University Medical CenterNew YorkNY10032USA
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Phusingha P, Ekalaksananan T, Vatanasapt P, Loyha K, Promthet S, Kongyingyoes B, Patarapadungkit N, Chuerduangphui J, Pientong C. Human papillomavirus (HPV) infection in a case-control study of oral squamous cell carcinoma and its increasing trend in northeastern Thailand. J Med Virol 2016; 89:1096-1101. [PMID: 27935063 DOI: 10.1002/jmv.24744] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 11/29/2016] [Accepted: 11/29/2016] [Indexed: 12/12/2022]
Abstract
Human papillomavirus (HPV) is an independent risk factor for development of oral squamous cell carcinoma (OSCC). This study aimed to investigate the role of HPV infection and the trend in percentage of HPV-associated OSCC over a 5-year period in northeastern Thailand. In this case-control study, 91 exfoliated oral cell samples and 80 lesion cell samples from OSCC cases and exfoliated oral cells from 100 age/gender-matched controls were collected. HPV infection was investigated by PCR using GP5+/GP6+ primers followed by HPV genotyping using reverse line blot hybridization. Quantitative RT-PCR was used to evaluate HPV oncogene transcription. Temporal trends of HPV infection were evaluated in archived formalin-fixed paraffin-embedded (FFPE) OSCC tissues using in situ hybridization. HPV DNA was found in 17.5% (14/80) of lesion samples from OSCC cases and 29.7% (27/91) of exfoliated oral cell samples from the same cases. These values were significantly higher than in exfoliated oral cell samples from controls (13%, 13/100). HPV-16 was the genotype most frequently found in OSCC cases (92.8%, 13/14 infected cases). Interestingly, HPV oncogene mRNA expression was detected and correlated with OSCC cases (P < 0.005). Of 146 archived FFPE OSCC samples, 82 (56.2%) were positive for high-risk HPV DNA and 64 (43.8%) cases were positive for HPV E6/E7 mRNA expression. There was a trend of increasing percentage of HPV-associated OSCC from 2005 to 2010. This was especially so for females with well-differentiated tumors in specific tongue sub-sites. We suggest that HPV infection plays an important role in oral carcinogenesis in northeastern Thailand.
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Affiliation(s)
- Pensiri Phusingha
- Faculty of Medicine, Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand.,HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Tipaya Ekalaksananan
- Faculty of Medicine, Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand.,HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Patravoot Vatanasapt
- HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Medicine, Department of Otorhinolaryngology, Khon Kaen University, Khon Kaen, Thailand
| | - Kulchaya Loyha
- Faculty of Public Health, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, Thailand
| | - Supannee Promthet
- HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Public Health, Department of Epidemiology, Khon Kaen University, Khon Kaen, Thailand
| | - Bunkerd Kongyingyoes
- Faculty of Medicine, Department of Pharmacology, Khon Kaen University, Khon Kaen, Thailand
| | - Natcha Patarapadungkit
- HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Medicine, Department of Pathology, Khon Kaen University, Khon Kaen, Thailand
| | - Jureeporn Chuerduangphui
- Faculty of Medicine, Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand.,HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Chamsai Pientong
- Faculty of Medicine, Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand.,HPV, EBV and Cancer Research Group, Khon Kaen University, Khon Kaen, Thailand
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5
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Das P, Thomas A, Kannan S, Deodhar K, Shrivastava SK, Mahantshetty U, Mulherkar R. Human papillomavirus (HPV) genome status & cervical cancer outcome--A retrospective study. Indian J Med Res 2016; 142:525-32. [PMID: 26658585 PMCID: PMC4743337 DOI: 10.4103/0971-5916.171276] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Background & objectives: Persistent infections with high-risk (HR) human papillomaviruses such as HPV 16, 18, 31, 33 and 45 have been identified as the major aetiological factor for cervical cancer. The clinical outcome of the disease is often determined by viral factors such as viral load, physical status and oncogene expression. The aim of the present study was to evaluate the impact of such factors on clinical outcome in HPV16 positive, locally advanced cervical cancer cases. Methods: One hundred and thirty two pretreatment cervical tumour biopsies were selected from patients undergoing radiotherapy alone (n=63) or concomitant chemo-radiation (n=69). All the samples were positive for HPV 16. Quantitative real time-PCR was carried out to determine viral load and oncogene expression. Physical status of the virus was determined for all the samples by the ratio of E2copies/E7copies; while in 73 cases, the status was reanalyzed by more sensitive APOT (amplification of papillomavirus oncogene transcripts) assay. Univariate analysis of recurrence free survival was carried out using Kaplan-Meier method and for multivariate analysis the Cox proportional hazard model was used. Results: The median viral load was 19.4 (IQR, 1.9- 69.3), with viral integration observed in 86 per cent cases by combination of the two methodologies. Both univariate and multivariate analyses identified viral physical status as a good predictor of clinical outcome following radiation treatment, with episomal form being associated with increased recurrence free survival. Interpretation & conclusions: The present study results showed that viral physical status might act as an important prognostic factor in cervical cancer.
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Affiliation(s)
| | | | | | | | | | | | - Rita Mulherkar
- Advanced Centre for Treatment, Research & Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India
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6
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Luu HN, Adler-Storthz K, Dillon LM, Follen M, Scheurer ME. Comparing the Performance of Hybrid Capture II and Polymerase Chain Reaction (PCR) for the Identification of Cervical Dysplasia in the Screening and Diagnostic Settings. Clin Med Insights Oncol 2013; 7:247-55. [PMID: 24137052 PMCID: PMC3795532 DOI: 10.4137/cmo.s12811] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE Both PCR and Hybrid Capture II (HCII) have been used for identifying cervical dysplasia; however, comparisons on the performance between these two tests show inconsistent results. We evaluated the performance of HCII and PCR MY09/11 in both screening and diagnostic populations in sub-sample of 1,675 non-pregnant women from a cohort in three clinical centers in the United States and Canada. METHODS Sensitivity, specificity, positive predictive value, negative predictive value, and concordance between the two tests were calculated. RESULTS Specificity of HCII in detecting low-grade squamous intraepithelial lesion (LSIL) was higher in the screening group (88.7%; 95% CI: 86.2%-90.8%) compared to the diagnostic group (46.3%; 95% CI: 42.1%-50.6%); however, specificity of PCR was low in both the screening (32.8%; 95% CI: 29.6%-36.2%) and diagnostic (14.4%; 95% CI: 11.6%-17.6%) groups. There was comparable sensitivity by both tests in both groups to detect high-grade squamous intraepithelial lesion (HSIL); however, HCII was more specific (89.1%; 95% CI: 86.8%-91.0%; 66.2%; 95% CI: 62.0%-70.1%) than PCR (33.3%; 95% CI: 30.2%-36.5%; 17.9%; 95% CI: 14.8%-21.6%) in the screening and diagnostic groups, respectively. Overall agreement for HPV positivity was approximately 50% between HCII and PCR MY09/11; with more positive results coming from the PCR MY09/11. CONCLUSION In the current study, PCR MY09/11 was more sensitive but less specific than HCII in detecting LSIL, and HCII was more sensitive and specific in detecting HSIL than PCR in both screening and diagnostic groups.
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Affiliation(s)
- Hung N Luu
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas, USA. ; Division of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, the University of Texas Health Science Center-Houston, Texas, USA
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Mukherjee A, Dass G, G JM, Gohain M, Brahma B, Datta TK, De S. Absolute copy number differences of Y chromosomal genes between crossbred (Bos taurus × Bos indicus) and Indicine bulls. J Anim Sci Biotechnol 2013; 4:15. [PMID: 23556478 PMCID: PMC3668231 DOI: 10.1186/2049-1891-4-15] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 03/25/2013] [Indexed: 11/12/2022] Open
Abstract
Background The Y chromosome in mammal is paternally inherited and harbors genes related to male fertility and spermatogenesis. The unique intra-chromosomal recombination pattern of Y chromosome and morphological difference of this chromosome between Bos taurus and Bos indicus make it an ideal model for studying structural variation, especially in crossbred (Bos taurus × Bos indicus) bulls. Copy Number Variation (CNV) is a type of genomic structural variation that gives information complementary to SNP data. The purpose of this study was to find out copy number differences of four Y chromosomal spermatogenesis-related candidate genes in genomic DNA of crossbred and purebred Indicine bulls. Result Four Y chromosomal candidate genes of spermatogenesis namely, sex determining gene on Y chromosome (SRY), DEAD box polypeptide 3-Y chromosome (DDX3Y), Ubiquitin specific peptidase 9, Y-linked (USP9Y), testis-specific protein on Y chromosome (TSPY) were evaluated. Absolute copy numbers of Y chromosomal genes were determined by standard curve-based quantitative real time PCR. Copy numbers of SRY and TSPY genes per unit amount of genomic DNA are higher in crossbred than Indicine bulls. However, no difference was observed in DDX3Y and USP9Y gene copy numbers between two groups. Conclusion The present study demonstrates that the structural organization of Y chromosomes differs between crossbred and Indicine bulls which are reproductively healthy as observed from analysis of semen attributes. The absolute copy numbers of SRY and TSPY genes in unit mass of genomic DNA of crossbred bulls are significantly higher than Indicine bulls. No alteration in absolute copies of DDX3Y and USP9Y gene was found between the genome of crossbred and Indicine bulls. This study suggests that the DDX3Y and USP9Y are likely to be single copy genes in the genome of crossbred and Indicine bulls and variation in Y chromosome length between crossbred and Indicine bulls may be due to the copy number variation of SRY gene and TSPY array.
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Affiliation(s)
- Ayan Mukherjee
- Animal Genomics Lab, Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India.
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8
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Paakkanen R, Vauhkonen H, Eronen KT, Järvinen A, Seppänen M, Lokki ML. Copy number analysis of complement C4A, C4B and C4A silencing mutation by real-time quantitative polymerase chain reaction. PLoS One 2012; 7:e38813. [PMID: 22737222 PMCID: PMC3380926 DOI: 10.1371/journal.pone.0038813] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 05/10/2012] [Indexed: 01/30/2023] Open
Abstract
Low protein levels and copy number variation (CNV) of the fourth component of human complement (C4A and C4B) have been associated with various diseases. High-throughput methods for analysing C4 CNV are available, but they commonly do not detect the most common C4A mutation, a silencing CT insertion (CTins) leading to low protein levels. We developed a SYBR® Green labelled real-time quantitative polymerase chain reaction (qPCR) with a novel concentration range approach to address C4 CNV and deficiencies due to CTins. This method was validated in three sample sets and applied to over 1600 patient samples. CTins caused C4A deficiency in more than 70% (76/105) of the carriers. Twenty per cent (76/381) of patients with a C4A deficiency would have been erroneously recorded as having none, if the CTins had not been assessed. C4A deficiency was more common in patients than a healthy reference population, (OR = 1.60, 95%CI = 1.02-2.52, p = 0.039). The number of functional C4 genes can be straightforwardly analyzed by real-time qPCR, also with SYBR® Green labelling. Determination of CTins increases the frequency of C4A deficiency and thus helps to elucidate the genotypic versus phenotypic disease associations.
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Affiliation(s)
- Riitta Paakkanen
- Transplantation Laboratory, Haartman Institute, University of Helsinki, Helsinki, Finland.
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9
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Buys TPH, Cantor SB, Guillaud M, Adler-Storthz K, Cox DD, Okolo C, Arulogon O, Oladepo O, Basen-Engquist K, Shinn E, Yamal JM, Beck JR, Scheurer ME, van Niekerk D, Malpica A, Matisic J, Staerkel G, Atkinson EN, Bidaut L, Lane P, Benedet JL, Miller D, Ehlen T, Price R, Adewole IF, MacAulay C, Follen M. Optical technologies and molecular imaging for cervical neoplasia: a program project update. ACTA ACUST UNITED AC 2011; 9:S7-24. [PMID: 21944317 DOI: 10.1016/j.genm.2011.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 08/02/2011] [Indexed: 12/23/2022]
Abstract
There is an urgent global need for effective and affordable approaches to cervical cancer screening and diagnosis. In developing nations, cervical malignancies remain the leading cause of cancer-related deaths in women. This reality may be difficult to accept given that these deaths are largely preventable; where cervical screening programs have been implemented, cervical cancer-related deaths have decreased dramatically. In developed countries, the challenges of cervical disease stem from high costs and overtreatment. The National Cancer Institute-funded Program Project is evaluating the applicability of optical technologies in cervical cancer. The mandate of the project is to create tools for disease detection and diagnosis that are inexpensive, require minimal expertise, are more accurate than existing modalities, and can be feasibly implemented in a variety of clinical settings. This article presents the status and long-term goals of the project.
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Affiliation(s)
- Timon P H Buys
- Imaging Unit, Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada.
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10
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Cantor SB, Yamal JM, Guillaud M, Cox DD, Atkinson EN, Benedet JL, Miller D, Ehlen T, Matisic J, van Niekerk D, Bertrand M, Milbourne A, Rhodes H, Malpica A, Staerkel G, Nader-Eftekhari S, Adler-Storthz K, Scheurer ME, Basen-Engquist K, Shinn E, West LA, Vlastos AT, Tao X, Beck JR, MacAulay C, Follen M. Accuracy of optical spectroscopy for the detection of cervical intraepithelial neoplasia: Testing a device as an adjunct to colposcopy. Int J Cancer 2011; 128:1151-68. [PMID: 20830707 PMCID: PMC3015005 DOI: 10.1002/ijc.25667] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Accepted: 07/12/2010] [Indexed: 12/11/2022]
Abstract
Testing emerging technologies involves the evaluation of biologic plausibility, technical efficacy, clinical effectiveness, patient satisfaction, and cost-effectiveness. The objective of this study was to select an effective classification algorithm for optical spectroscopy as an adjunct to colposcopy and obtain preliminary estimates of its accuracy for the detection of CIN 2 or worse. We recruited 1,000 patients from screening and prevention clinics and 850 patients from colposcopy clinics at two comprehensive cancer centers and a community hospital. Optical spectroscopy was performed, and 4,864 biopsies were obtained from the sites measured, including abnormal and normal colposcopic areas. The gold standard was the histologic report of biopsies, read 2 to 3 times by histopathologists blinded to the cytologic, histopathologic, and spectroscopic results. We calculated sensitivities, specificities, receiver operating characteristic (ROC) curves, and areas under the ROC curves. We identified a cutpoint for an algorithm based on optical spectroscopy that yielded an estimated sensitivity of 1.00 [95% confidence interval (CI) = 0.92-1.00] and an estimated specificity of 0.71 [95% CI = 0.62-0.79] in a combined screening and diagnostic population. The positive and negative predictive values were 0.58 and 1.00, respectively. The area under the ROC curve was 0.85 (95% CI = 0.81-0.89). The per-patient and per-site performance were similar in the diagnostic and poorer in the screening settings. Like colposcopy, the device performs best in a diagnostic population. Alternative statistical approaches demonstrate that the analysis is robust and that spectroscopy works as well as or slightly better than colposcopy for the detection of CIN 2 to cancer.
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Affiliation(s)
- Scott B. Cantor
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jose-Miguel Yamal
- Division of Biostatistics, The University of Texas School of Public Health, Houston, Texas
| | - Martial Guillaud
- Department of Cancer Imaging, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Dennis D. Cox
- Department of Statistics, Rice University, Houston, Texas
| | - E. Neely Atkinson
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - J. L. Benedet
- Department of Cancer Imaging, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Dianne Miller
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Thomas Ehlen
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jasenka Matisic
- Department of Pathology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dirk van Niekerk
- Department of Pathology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Monique Bertrand
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Andrea Milbourne
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Helen Rhodes
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anais Malpica
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gregg Staerkel
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Shahla Nader-Eftekhari
- Department of Obstetrics, Gynecology, and Reproductive Sciences, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Karen Adler-Storthz
- The University of Texas Health Science Center at Houston Dental Branch, Houston, Texas
| | - Michael E. Scheurer
- Department of Pediatrics and Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Karen Basen-Engquist
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Eileen Shinn
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Loyd A. West
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anne-Therese Vlastos
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xia Tao
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | | | - Calum MacAulay
- Department of Cancer Imaging, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Michele Follen
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Obstetrics, Gynecology, and Reproductive Sciences, The University of Texas Health Science Center at Houston, Houston, Texas
- Department of Obstetrics, Gynecology, and Reproductive Sciences, the Lyndon Baines Johnson Hospital, Houston, Texas
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del Moral-Hernández O, López-Urrutia E, Bonilla-Moreno R, Martínez-Salazar M, Arechaga-Ocampo E, Berumen J, Villegas-Sepúlveda N. The HPV-16 E7 oncoprotein is expressed mainly from the unspliced E6/E7 transcript in cervical carcinoma C33-A cells. Arch Virol 2010; 155:1959-70. [PMID: 20865289 DOI: 10.1007/s00705-010-0787-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 08/23/2010] [Indexed: 11/29/2022]
Abstract
The HPV-16 E6/E7 early transcripts are first produced as bicistronic or polycistronic mRNAs, and about 90% of the original pre-mRNA is spliced to produce three new alternative mRNAs. HPV-16 spliced transcripts are expressed heterogeneously in tumors and cell lines. Our results suggest that suboptimal splicing acceptor sites in E6/E7 intron 1 and the differential expression of splicing factors are involved in the production of the heterogeneous splicing profile in cell lines. The unspliced pre-mRNA and the alternative spliced transcripts contribute differentially to the production of E7 in stably transfected C33-A cells. The highest level of E7 was produced from the least prevalent transcript, the unspliced E6/E7(pre-mRNA). The order of relative expression of E7 was unspliced E6/E7(pre-mRNA) > E6*I/E7 > E6*II/E7. Our findings suggest that E6/E7 alternative splicing may be a mechanism for differential expression of the E6 and E7 oncoproteins, which also affects the expression of their targets, the proteins p53 and pRb.
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Affiliation(s)
- Oscar del Moral-Hernández
- Unidad Zacatenco, Depto. Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados-IPN (CINVESTAV-IPN), Av. IPN # 2508, Zacatenco, Apdo. Postal 14-740, 07360, Mexico, D.F., Mexico
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12
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Das D, Bhattacharjee B, Sen S, Mukhopadhyay I, Sengupta S. Association of viral load with HPV16 positive cervical cancer pathogenesis: causal relevance in isolates harboring intact viral E2 gene. Virology 2010; 402:197-202. [PMID: 20394955 DOI: 10.1016/j.virol.2010.03.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Revised: 02/03/2010] [Accepted: 03/17/2010] [Indexed: 10/19/2022]
Abstract
We tested the hypothesis that cervical cancers (CaCx) harbor high HPV16 viral load compared to controls and this is influenced by E2 status and age of subjects. Viral load (natural log transformed values) per 100ng genomic DNA was estimated (152 cases and 87 controls) by Taqman assay. Median viral load was significantly higher (Mann-Whitney U test) among cases (17.21) compared to controls (9.86), irrespective of E2 status or upon considering E2 status as a covariate in logistic regression model (p<0.001). Viral load of E2 intact cases (17.80) was significantly higher (p<0.001) compared to those with disrupted E2 (9.78). At equivalent probability of being a case, viral load was higher among individuals (i) of lower age, irrespective of E2 status, and (ii) with intact E2 but of similar age as those with disrupted E2. Thus viral load in association with E2 status and/or age might be of causal relevance in CaCx pathogenesis.
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Affiliation(s)
- Damayanti Das
- Human Genetics Unit, Indian Statistical Institute, 203, B.T. Road, Kolkata 700108, India
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Qu S, Shi Q, Zhou L, Guo Z, Zhou D, Zhai J, Yang R. Ambient stable quantitative PCR reagents for the detection of Yersinia pestis. PLoS Negl Trop Dis 2010; 4:e629. [PMID: 20231881 PMCID: PMC2834737 DOI: 10.1371/journal.pntd.0000629] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 01/25/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Although assays for detecting Yersinia pestis using TaqMan probe-based real-time PCR have been developed for years, little is reported on room-temperature-stable PCR reagents, which will be invaluable for field epidemic surveillance, immediate response to public health emergencies, counter-bioterrorism investigation, etc. In this work, a set of real-time PCR reagents for rapid detection of Y. pestis was developed with extraordinary stability at 37 degrees C. METHODS/PRINCIPAL FINDINGS TaqMan-based real-time PCR assays were developed using the primers and probes targeting the 3a sequence in the chromosome and the F1 antigen gene caf1 in the plasmid pMT1of Y. pestis, respectively. Then, carbohydrate mixtures were added to the PCR reagents, which were later vacuum-dried for stability evaluation. The vacuum-dried reagents were stable at 37 degrees C for at least 49 days for a lower concentration of template DNA (10 copies/microl), and up to 79 days for higher concentrations (> or =10(2) copies/microl). The reagents were used subsequently to detect soil samples spiked with Y. pestis vaccine strain EV76, and 5x10(4) CFU per gram of soil could be detected by both 3a- and caf1-based PCR reagents. In addition, a simple and efficient method for soil sample processing is presented here. CONCLUSIONS/SIGNIFICANCE The vacuum-dried reagents for real-time PCR maintain accuracy and reproducibility for at least 49 days at 37 degrees C, indicating that they can be easily transported at room temperature for field application if the machine for performing real-time PCR is available. This dry reagent is of great significance for routine plague surveillance.
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Affiliation(s)
- Shi Qu
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Qinghai Shi
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Lei Zhou
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Zhaobiao Guo
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Dongsheng Zhou
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Junhui Zhai
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Ruifu Yang
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
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Dharajiya N, Vaidya SV, Murai H, Cardenas V, Kurosky A, Boldogh I, Sur SA. FcgammaRIIb inhibits allergic lung inflammation in a murine model of allergic asthma. PLoS One 2010; 5:e9337. [PMID: 20179765 PMCID: PMC2825267 DOI: 10.1371/journal.pone.0009337] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 01/25/2010] [Indexed: 12/17/2022] Open
Abstract
Allergic asthma is characterized by airway eosinophilia, increased mucin production and allergen-specific IgE. Fc gamma receptor IIb (FcγRIIb), an inhibitory IgG receptor, has recently emerged as a negative regulator of allergic diseases like anaphylaxis and allergic rhinitis. However, no studies to date have evaluated its role in allergic asthma. Our main objective was to study the role of FcγRIIb in allergic lung inflammation. We used a murine model of allergic airway inflammation. Inflammation was quantified by BAL inflammatory cells and airway mucin production. FcγRIIb expression was measured by qPCR and flow cytometry and the cytokines were quantified by ELISA. Compared to wild type animals, FcγRIIb deficient mice mount a vigorous allergic lung inflammation characterized by increased bronchoalveolar lavage fluid cellularity, eosinophilia and mucin content upon ragweed extract (RWE) challenge. RWE challenge in sensitized mice upregulated FcγRIIb in the lungs. Disruption of IFN-γ gene abrogated this upregulation. Treatment of naïve mice with the Th1-inducing agent CpG DNA increased FcγRIIb expression in the lungs. Furthermore, treatment of sensitized mice with CpG DNA prior to RWE challenge induced greater upregulation of FcγRIIb than RWE challenge alone. These observations indicated that RWE challenge upregulated FcγRIIb in the lungs by IFN-γ- and Th1-dependent mechanisms. RWE challenge upregulated FcγRIIb on pulmonary CD14+/MHC II+ mononuclear cells and CD11c+ cells. FcγRIIb deficient mice also exhibited an exaggerated RWE-specific IgE response upon sensitization when compared to wild type mice. We propose that FcγRIIb physiologically regulates allergic airway inflammation by two mechanisms: 1) allergen challenge mediates upregulation of FcγRIIb on pulmonary CD14+/MHC II+ mononuclear cells and CD11c+ cells by an IFN-γ dependent mechanism; and 2) by attenuating the allergen specific IgE response during sensitization. Thus, stimulating FcγRIIb may be a therapeutic strategy in allergic airway disorders.
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Affiliation(s)
- Nilesh Dharajiya
- National Heart, Lung, and Blood Institute (NHLBI) Proteomics Center, Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Swapnil V. Vaidya
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Hiroki Murai
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Victor Cardenas
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Alexander Kurosky
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Istvan Boldogh
- Department of Microbiology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Sanjiv A. Sur
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
- * E-mail:
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Gnanamony M, Peedicayil A, Subhashini J, Ram TS, Christopher S, Gravitt P, Abraham P. Human Papillomavirus Types 16 and 18 mRNA Levels and Not DNA Levels May be Associated With Advancing Stages of Cervical Cancer. Int J Gynecol Cancer 2009; 19:1415-20. [DOI: 10.1111/igc.0b013e3181b62e05] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Saijo M, Morikawa S, Kurane I. Real-time quantitative polymerase chain reaction for virus infection diagnostics. ACTA ACUST UNITED AC 2008; 2:1155-71. [DOI: 10.1517/17530059.2.10.1155] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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