Detection of Five Types of HPV Genotypes Causing Anogenital Warts (Condyloma Acuminatum) Using PCR-Tm Analysis Technology

Prevalence and potential implications of HPV infection in transgender women with gender reaffirming genital surgery: a systematic literature review and meta-analysis

BACKGROUND

Human papillomavirus (HPV) is a common infection of the anogenital tract. Although most infections clear, persistent infections with oncogenic types can predispose to cancer. While the natural history of anogenital HPV infection in cisgendered women is relatively well understood, there are significant knowledge gaps regarding HPV prevalence and clinical implications of genital HPV infection in transgender women (TGW) with neovagina(s).

METHODS

A systematic review, including meta-analysis, of studies available in the literature with data on HPV prevalence in TGW with neovaginas was performed. Additionally, a narrative analysis of the clinical manifestations of genital HPV infections in TGW with neovagina(s) was performed.

RESULTS

21 studies were included; six focused on the prevalence of HPV in TGW, and data were pooled in a meta-analysis of prevalence; 15 were case reports/series, which were included in a narrative analysis of clinical implications. The meta-analysis showed the prevalence of genital HPV in TGW with neovaginas was 15% (95% CI 9% to 21%). The most frequently detected HPV type was HPV 16. 18 TGW were included in case reports/series and the median age was 42; 12 presented with condylomata acuminata and six had squamous carcinoma.

CONCLUSION

Data on genital HPV prevalence in TGW with neovaginas are sparse, with many studies having small denominators. We report higher HPV prevalence compared with cisgendered women. Symptomatic genital HPV infection in TGW with neovaginas was largely associated with benign condylomata, although some carcinoma was detected. Future longitudinal studies are required to elucidate the clinical impact of genital HPV infection and examine its implications in TGW with neovaginas in order to inform prevention and management strategies.

Development of human papillomavirus and its detection methods (Review)

Human papillomavirus (HPV) infection plays an important role in cervical cancer. HPV is classified within the Papillomaviridae family and is a non-enveloped, small DNA virus. HPV infection can be classified into two distinct scenarios: i) With or without integration into the host chromosomes. Detection of its infection can be useful in the study of cervical lesions. In the present review, the structural and functional features of HPV, HPV typing, infection and transmission mode, the risk factors for cervical susceptibility to infection and HPV detection methods are described in detail. The development of HPV detection methods may have far-reaching significance in the prevention and treatment of cervical disease. This review summarizes the advantages and limitations of each HPV detection method.

PCR Techniques and Their Clinical Applications

Kary B. Mullis developed a revolutionary method name polymerase chain reaction (PCR) in 1983, which can synthesize new strand of DNA complementary to the template strand of DNA and produce billions of copies of a DNA fragment only in few hours. Denaturation, annealing, and extension are the three primary steps involved in the PCR process, which generally requires thermocyclers, DNA template, a pair of primers, Taq polymerase, nucleotides, buffers, etc. With the development of PCR, from traditional PCR, quantitative PCR, to next digital PCR, PCR has become a powerful tool in life sciences and medicine. Applications of PCR techniques for infectious diseases include specific or broad-spectrum pathogen detection, assessment and surveillance of emerging infections, early detection of biological threat agents, and antimicrobial resistance analysis. Applications of PCR techniques for genetic diseases include prenatal diagnosis and screening of neonatal genetic diseases. Applications of PCR techniques for cancer research include tumor-related gene detection. This chapter aimed to discuss about the different types of PCR techniques, including traditional PCR, quantitative PCR, digital PCR, etc., and their applications for rapid detection, mutation screen or diagnosis in infectious diseases, inherited diseases, cancer, and other diseases.

Application of two-dimensional polymerase chain reaction to detect four types of microorganisms in feces for assisted diagnosis of IBD

BACKGROUND

The incidence of inflammatory bowel disease (IBD) continues to increase annually, accounting for about 6.8 million cases in 2017 worldwide. However, there is currently no gold standard for the diagnosis of IBD.

METHODS

A method for the detection of four microorganisms in feces by two-dimensional polymerase chain reaction (2D-PCR) has been developed. Plasmids were used to validate the sensitivity and specificity of the method. Clinical samples were tested using a 2D-PCR method. Optimal diagnostic thresholds for IBD were determined based on ROC results.

RESULTS

Of the 112 samples, 78 were from IBD patients and 34 from patients with other gastrointestinal (GI) diseases. Thomasclavelia ramosum and univ907-1062 positivity are necessary, and two or more positives of the three bacteria (Thomasclavelia spiroforme, Thomasclavelia saccharogumia or Clostridium cluster XVIII) are the optimal diagnostic thresholds for IBD. The area under the curve was 0.826 with a 95% confidence interval of 0.735-0.981 and a p-value of 0.000, corresponding to a sensitivity of 0.769 and a specificity of 0.853.

CONCLUSIONS

Based on the detection results of microorganisms, IBD and GI can be effectively distinguished. The detection of four microorganisms in feces can assist clinicians in the differential diagnosis of IBD. Our experiment aims to provide a better program for early clinical diagnosis and regular dynamic monitoring of IBD.