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Management for persistent HPV infection and cervical lesions among women infected with HIV: a retrospective observational cohort study
Virology Journal volume 21, Article number: 133 (2024)
Abstract
Background
Early diagnosis and treatment of HPV persistent infection and cervical intraepithelial neoplasia, which have yet to be thoroughly characterized in Guangxi, Southwestern China, are the key preventative measures for the development of cervical cancer in women, particularly in HIV-infected women.
Methods
A retrospective study of 181 patients with HPV infection or cervical intraepithelial neoplasia who received surgical excision of lesions and were prospectively enrolled at the Fourth People’s Hospital of Nanning between January 2018 and February 2023 was performed. HPV-infected patients were divided into two subgroups: HIV-infected and HIV/HPV-coinfected patients and compare differences between these groups.
Results
HPV16, 18, 52, and 58 were the most prevalent HPV genotypes. High-risk HPV was significantly co-infected with multiple genotypes (P = 0.0332). HIV-infected women were predisposed to HPV infection (P < 0.0001), and the development of cervical cancer at a young age (P = 0.0336) compared to HIV-uninfected women and the loop electrosurgical excision procedure (P = 0.0480) is preferred for the treatment.
Conclusions
HIV infection may increase HPV prevalence and lead to cervical cancer development at a young age. The loop electrosurgical excision procedure is an efficient evaluation and treatment strategy for HIV-infected women suffering from cervical intraepithelial neoplasia.
Introduction
Cervical cancer is the most prevalent cause of mortality among women with gynecologic malignancies [1, 2]. In 2020, according to estimates, more than 60 thousand women globally were diagnosed with cervical cancer, and approximately 34 thousand perished from the tumor [1, 2]. Human papillomaviruses (HPV) are responsible for nearly all occurrences of cervical cancer. These DNA viruses invade basal epithelium cells preferentially, and their efficient evasion of host defense can lead to the development of intraepithelial lesions and cervical cancer. The two different transcriptional elements of HPV, E6 and E7, encode proteins required for the virus to replicate. The E6 oncoprotein functions by attaching with and deactivating the tumor suppressor gene TP53 via proteolytic deterioration, therefore disrupting a natural cell cycle regulation [3,4,5,6]. The E7 oncoprotein interacts with and deactivates molecules generated by the retinoblastoma gene, pRb, causing unregulated development of cell cycles in HPV-infected cells [6,7,8]. Over 200 HPV kinds have been identified as infecting the human genitalia tract, with 12–20 of them categorized as malignant or at high risk of developing cervical cancer [9,10,11,12,13].
To prevent cancer of the cervical cavity, women can be examined using several tests to screen individuals who are suffering from or susceptible to cervical pre-cancer. Cervical intraepithelial neoplasia (CIN) is characterized by cellular alterations in the conversion zone of the cervix [14]. CIN is primarily caused by HPV contagion, particularly high-risk HPV types featuring strains 16 and 18, which result in more than 70% of cervical malignancies [9, 14, 15]. CIN1+ lesions are morphological characteristics associated with HPV infections and are categorized as low-grade squamous intraepithelial lesions. CIN2+/3+ lesions, which are well-known as high-grade squamous intraepithelial lesions, are associated with cervical pre-cancers, which may proceed to cervical cancer if left untreated.
Given the stage and the extent of the conditions, the present therapy for CIN involves either local ablative therapy or excisional procedures [16,17,18]. The capacity to provide atypical features in the excised material for pathological investigation, so verifying the diagnosis, eliminating undetected cancer, and getting details about the exhaustiveness of excision, is the fundamental advantage of excisional over ablative therapy. Excisional biopsy is the most prevalent treatment algorithm for cervical intraepithelial neoplasia: loop electrosurgical excision procedure (LEEP) or large loop excision of the transformation zone (LLETZ), laser conization (LC), or cold knife conization (CKC).
HPV has been scientifically identified as an important co-infecting virus with human immunodeficiency virus (HIV) infections in some areas of Africa, along with other regions where it has become endemic [19]. In the past couple of decades, studies have shown that HIV/HPV co-infection can occur in certain clinical situations [20,21,22,23]. An increased risk of developing malignancies associated with HPV infection has been reported among individuals living with HIV infections [11, 15, 23,24,25,26]. An individual with HIV infection is at high risk of developing cancer as HIV infection induces immunosuppression, increasing the replication of oncogenic viruses. Given the significant incidence of HIV in Southwest China [27] and the country with low vaccination coverage [9], particularly among young women, we define the epidemiology and management of persistent HPV infection and cervical lesions in this scenario. These data give insights into the epidemiology of HPV and clinical management, and undertaking integrated analysis of clinical scientific significance is beneficial in acquiring a better understanding of existing excisional therapies and upcoming trends.
Materials and methods
Study design and patients
We carried out a retrospective, descriptive cohort analysis using data gathered and analyzed prospectively from clinical practice in Nanning, China. The inclusion criteria were as follows: (i) Between March 2018 and February 2023, patients were hospitalized at The Fourth People’s Hospital of Nanning, (ii) The patient received one of four surgical therapy or examination modalities for the first time. Four surgical treatments or examinations were set as follows: LEEP or LLETZ, cervical biopsy, resection or curettage, or CKC. (iii) The patients received follow-up visits for at least six months, (iv) The patients received HIV antibody and HIV-RNA testing, and (v) individuals older than 18 who have persistent HPV infection and cervical intraepithelial neoplasia. Resection or curettage are defined as tissues was surgically removed with clean resection margins and postoperative histopathology. Out-patients and inpatients lost to follow-up were excluded. A history of cervical malignancies was absent in any individuals. Persistent HPV infection was defined as a positive result at baseline and follow-up visits for any HPV genotype for more than three consecutive visits.
Ethics statement
All patients provided informed consent, and formal informed consent was acquired. The Fourth People’s Hospital of Nanning Ethics Committee has given its approval for a study involving human subjects that conforms to all pertinent national laws, institutional rules, and the principles of the 2013 revision of the Helsinki Declaration. The ethical approval number is [2022]78.
Data collection
Two authors independently adopted a systematic information-collecting method to extract clinical and laboratory results from the inpatient electronic medical record. Gender, age, surgical procedures, clinical pathological investigations, clinical symptoms and signs, laboratory findings, period of hospitalization before infection, rationale for admission, and follow-up evaluation were among the information received.
Comorbid medical conditions at the beginning of study admission were considered possible confounders. These conditions included HIV, malignancy, renal insufficiency, hepatitis B virus (HBV), severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), autoimmune illness, diabetes, and hypertension or coronary heart disease.
Sample size
The sample sizes were determined based on previous preclinical research. A molecular epidemiological investigation was carried out on the basis of the findings of the clinical epidemiologic study. In 2022, a total of 575 inpatients received new confirmed HIV diagnoses, and 58 cases were co-infected with HPV. Precise logistic regression implies the development of logistic regression models with sample sizes that meet the minimal requirements, and the equation used for calculating sample size is as follows:
N: the minimum sample size, k: the number of independent variables, p: the rate of positive or negative indices in the infected population, whichever was smaller.
The focus of this study was to investigate the prospects of surgery for persistent HPV infection and cervical lesions in HIV-infected women. The major source of concern was HIV and HPV co-infection. The minimal sample size required was 100 cases, according to the sample size calculation algorithm.2.5 Data Analysis.
The median and interquartile range (IQR) were used to summarize continuous variables, while frequencies and percentages were applied to summarize categorical variables. MedCalc® statistical software (version 15.8, Ostend, Belgium) was used for all the analyses. We assessed the data utilizing two conventions, the Mann-Whitney test and logistic regression, after achieving univariate statistics. Statistical significance was defined as a P-value less than 0.05.
Fisher exact test Comparing proportions within categorical variables was done using the Fisher exact test between HIV-infected and HIV-uninfected groups.
Mann-Whitney test The Mann-Whitney test was used to compare continuous variables, clinical laboratory results, such as white blood cell count, red blood cell count, alanine aminotransferase, aspartate aminotransferase, and creatinine, between HIV-infected and HIV-uninfected groups.
Logistic regression All variables associated with two-rate comparisons were submitted to univariate logistic regression analysis. Odds ratios (OR) were calculated using univariate logistic regression. The incidence rate ratio (IRR) was generated by comparing two rates.
Results
Demographic and clinical characteristics
Table 1 summarizes the patient demographics and clinical characteristics of the research individuals by condition status. Correlations between non-menstrual vaginal bleeding and anemia indicated a positive regression slope (slope = 0.855, P < 0.001), whereas there was no significant association between anemia severity and disease duration. (Spearman correlation coefficient r = 0.3049 [95%CI -0.1036-0.3199], P = 0.3049). Of the 83 subjects with anemia, 27 exhibited the characteristic microcytic and hypochromic anemia, with significant decreases in mean corpuscular volume (MCV, 69 [IQR: 66–75] fl.), mean corpuscular hemoglobin (MCH, 20 [IQR: 19–22] pg) and mean corpuscular hemoglobin concentration (MCHC, 300 [IQR: 286–308] g/L). The remaining patients presented with normocytic anemia, and the MCV (93 [IQR: 90–97] fl.), MCH (30 [IQR: 28–32] pg), and MCHC (325 [IQR: 319–330] g/L) were mild reduction. Patients living with HIV were at a higher risk of HPV infection than HIV-uninfected women in a set of cases infected with any oncogenic HPV (OR = 4.32 [95%CI 2.82–6.62], P < 0.0001). Non-menstrual vaginal bleeding in HIV/HPV-coinfected women was associated with an increased risk of cervical cancer (OR = 5.16 [95%CI 1.04–25.55], P = 0.0443). Patients with HIV infection increase the risk of Mycoplasma genitalium infection (OR = 4.81 [95%CI 1.09–21.13], P = 0.0373). Among women living with HIV, the incidence rate ratio of Mycoplasma genitalium infection was significantly higher than in HIV-uninfected individuals (IRR = 3.93 [95%CI 1.01–33.78], P = 0.0421). Compared to HIV-uninfected women, women living with HIV had lower CD4-positive T-lymphocyte, white blood cells, red blood cells, and neutrophils index, even if treated with antiretroviral therapy. Alternatively, multiple biochemical indicators (Table 2) for liver and kidney function were abnormal, indicating impairment of liver and kidney function.
HPV prevalence and genotypes distribution
We observed a significant dispersion of a variety of HPV strains in the HPV genotypes among the afflicted women (Table 3). In total, 88 patients (48%) endured mono-genotype HPV infections; HPV16 genotypes were the most prevalent (17%). In terms of infection with a single HPV genotype among infected women, we discovered that the prevalence of the HPV16 genotype was 38% and 27% in the HIV-infected and HIV-uninfected groups, respectively. The relative prevalence (IRR = 1.38 [95%CI 0.52–4.61], P = 0.4982) of the HPV16 genotype did not differ significantly between HIV-infected and HIV-uninfected groups. High-risk cancer-causing HPV genotypes contribute to susceptibility to infection involving multiple genotypes (OR = 3.62 [95%CI 1.10-11.82], P = 0.0332). Overall, 147 women endured HIV and HPV co-infection, among whom 77 cases (52%) were infected with multiple HPV genotypes and 73 (49%) were infected with at least one high-risk genotype associated with malignancy. In 16 instances (47%), several HPV genotypes were present, and a total of 13 (38%) tested positive for at least one high-risk HPV genotype among women without HIV infection. The relative prevalence (IRR = 1.16 [95%CI 0.64–2.29], P = 0.6079) of infection for multiple HPV genotypes across participants with and without HIV infection did not significantly differ.
Pathological evaluation and surgical treatment
In addition, knowledge of the cervical intraepithelial neoplasia profile is essential to execute clinically useful and individualized therapy (Table 4). With and without HIV infection, 111 and 15 women, respectively, underwent the loop electrosurgical excision procedure (LEEP), while the remainder received knife cone biopsy or colposcopy. HIV-infected women had the loop electrosurgical excision procedure more frequently than HIV-uninfected women (IRR = 1.71 [95%CI 0.99–3.16], P = 0.0480). Following histological assessment, roughly 10% of patients with cervical intraepithelial neoplasia were unable to be entirely resected by adopting the loop electrosurgical excision procedure. Of the 34 HIV-uninfected women who were infected with HPV, 4 received a diagnosis of cervical cancer, 8 had a diagnosis of high-grade squamous intraepithelial lesions, 8 were diagnosed with low-grade squamous intraepithelial lesions, and seven cases did not significantly alter the gross cervical histopathology. Among 147 women with HIV/HPV co-infection, 51 were diagnosed with cervical cancer, 37 were diagnosed as having CIN2+/3+ lesions, 21 were diagnosed with CIN1+ lesions, and 14 did not show any discernible alterations on cervix histopathology. Compared to HIV-uninfected women, those living with HIV preferred surgical treatment focused on delivering pathological analysis results over colposcopy (IRR = 1.79 [95%CI 1.09–3.12], P = 0.0174). Compared with HIV-uninfected women, cases co-infected with HIV/HPV had an increased risk of cervical cancer at an early age (61 [IQR: 58–66] vs. 49 [IQR: 42–59] years, P = 0.0336), although HIV-infected women were as early as possible ever to receive highly active antiretroviral therapy (HAART). Overall, Cervical cancer has been linked to prolonged infection with high-risk HPV genotypes (OR = 6.41 [95%CI 1.46–28.18], P = 0.0021). The prevalence of HPV genotypes 16 and 18 was approximately 78% (45/58) of aggregate high-risk HPV. In addition, another finding indicated that in comparison to HIV-uninfected women, women living with HIV had an increased cervical cancer incidence (OR = 4.35 [95%CI 1.45–13.02], P = 0.0085).
Seventeen HIV-infected and two HIV-uninfected patients were diagnosed with advanced cervical cancer. Ten patients with late-stage cancer received platinum and taxane-based treatment, while seven women did not. Significant differences in the incidence of advanced cervical cancer were not observed between HIV-infected and HIV-uninfected women (IRR = 1.96 [95%CI 0.46–17.54], P = 0.3567). Among 55 cervical cancer patients, a total of 33 women received abdominal hysterectomy, whereas four women were treated with local excision. Contrary to those who underwent treatment with local excision, women who developed cervical cancer were more likely to require abdominal hysterectomy (IRR = 4.57 [95%CI 1.98–12.27], P = 0.0001).
Based on histological investigations, the number of cases eventually deemed to be cervical intraepithelial neoplasia was 58 in HIV-infected individuals and 16 in HIV-uninfected people. HIV plays an important role in the development of cervical intraepithelial neoplasia (OR = 4.37 [95%CI 1.46–13.06], P = 0.0029). The prevalence of cervical intraepithelial neoplasia varied significantly between HIV-infected and HIV-uninfected women (IRR = 4.37 [95%CI 1.61–16.61], P = 0.0018). However, no significant difference in surgical procedures between HIV-infected and HIV-uninfected groups was observed (IRR = 1.25 [95%CI 0.48–4.08], P = 0.6400).
Although most hysterectomies are performed due to cervical cancer or high-grade squamous lesions, no significant difference was observed between HIV-uninfected and HIV-infected patients (Table 5). However, among women infected with any genotype HPV, those living with HIV were more inclined to receive hysterectomy compared with HIV-uninfected patients (IRR = 3.62 [95%CI 1.08–18.95], P = 0.0257), without considering hysterectomies done for other medical conditions including uterine prolapse, endometriosis, and cervical cancer. Eight of the 70 women who underwent hysterectomy laparoscopic surgery, and the rest had open abdominal surgery. Eight women underwent laparoscopic hysterectomy; one was HIV-uninfected, and the other seven were HIV-infected, and no significant differences were observed between the two groups (IRR = 0.78 [95%CI 0.10-35.05], P = 0.8137). A total of 55 women with cervical cancer underwent surgery and chemotherapy, 33 of whom had open abdominal hysterectomy.
Discussion
This study defined the epidemiology and surgical treatment for persistent HPV infection and cervical lesions regarding young women in this context and the high HIV prevalence in Southwest China. Consistent with previous studies of epidemiology and management [11, 14, 20, 21, 28,29,30,31,32], we found that women living with HIV are more likely to suffer from chronic HPV infection, which is susceptible to cervical malformations and malignancies. However, HPV incidence differed considerably between HIV-infected and HIV-uninfected women, and susceptibility to cervical cancer was younger, implying that HIV infection and transmission increased HPV prevalence and cervical cancer development. Furthermore, regarding HPV infection, HIV-uninfected women with early diagnoses were younger compared with HIV-infected women with late diagnoses, and they had a lower level of nonoperative management, which suggested that systemic treatment with surgical management appears to have been inadequately carried out.
HPV prevalence diverges widely across globally [9, 13]. In this study, multiple genotypes of HPV prevalence were found to increase with high-risk genotype in populations, especially among HIV-infected women, with two of the most dominant genotypes being 16 and 18, which was consistent with the previously published in China and other countries [9, 13]. Demographic characteristics, socioeconomic situation, education level, inadequate early detection of cervical cancer, and vaccination coverage all have a significant impact on HPV prevalence. However, variable incidences of HPV prevalence were covered when HPV prevalence in women was investigated by area. The main secondary genotypes involved in women are HPV52 and 58 in this study, HPV genotype 45 in Spain and Colombia [13], HPV genotypes 31 and 35 in Latin America [13], and HPV genotype 45 in the Philippines [13]. Considering the inconsistent distribution of HPV incidence, more sophisticated measures to decrease infection rates and perhaps reduce the probability of developing cervical cancer are required.
Women living with HIV exhibit a high incidence of HPV infection and have an increased likelihood of developing cervix cancer at an early age. These findings are in line with prior reports [14, 28, 33, 34]. The HPV E6 and E7 proteins, which are essential stimuli of cell alteration, are constantly generated in HPV-associated precancerous abnormalities and malignancies. These proteins restructure cellular signal transduction paths, leading to developments in cancer signatures. High-risk HPV E6 and E7 proteins, respectively, target the tumor suppressors p53 and retinoblastoma (pRB), which are rendered inactive by variation in nearly all folks with solid tumors [3,4,5, 8, 3, 35]. These proteins additionally interact with numerous other proteins, including transcription factors, which are involved in regulating cellular gene expression. The increased prevalence and longer duration of HPV infection in HIV-infected women is believed to be associated with an immunocompromised situation [11, 25, 26], which increases the risk of cervical cancer. HIV infection contributes to aberrant T-cell homeostasis, which is characterized by T-cell exhaustion and impaired cytolytic activity [26, 33, 36]. HIV infection may change the cytokine response of cervical secretions to HPV infection, which may increase susceptibility to HPV infections and infection persistence [24]. The increased incidence and persistence of HPV infection in persons living with HIV implies that cell and cytokine-mediated immune responses may play a significant role in the treatment and prevention of HPV infestation.
According to the stage and degree of the illness, the present treatment for cervical intraepithelial neoplasia is either regional ablative methods or excisional practices [37,38,39]. Cervical intraepithelial neoplasia can be manipulated using an ablative approach in which the epithelial layer gets ruined by cold or heat ablation to a depth ranging from 6 to 7 mm, while histopathological assessment or margin details cannot be achieved. This therapy was rarely used in this study. An additional technique is transformation zone excision by employing a large loop excision or cold knife conization. Since its first demonstration by Walter Prendiville in 1986 [17, 18], the loop electrosurgical excision procedure has been an effective, widely applied therapy for treating all stages of cervical intraepithelial neoplasia. Nearly 70% of patients who were diagnosed with HPV infection were treated with the loop electrosurgical excision procedure. The loop electrosurgical excision procedure gains a high success rate and few adverse effects in this study. Previous randomized and non-randomized trials investigating the effectiveness of the loop electrosurgical excision procedure on cervical intraepithelial neoplasia reported cure rates ranging from 90 to 98% and failure rates ranging from 5 to 16% [16, 37]. Cold knife conization, with a higher applied frequency of treatment, was found to be highly effective in cervical intraepithelial neoplasia. In randomized controlled and non-randomized trials, the loop electrosurgical excision procedure and cold knife conization were assessed, and no differences in failure rates adhering to the treatment of cervical intraepithelial neoplasia were found [16, 37, 39, 40]. The main drawbacks of cold knife conization are that it is more common than loop electrosurgical excision techniques and necessitates hospitalization for the procedure’s execution under regional or general anesthesia. Complications such as main and secondary hemorrhage and unfavorable pregnancy outcomes are also common.
Concerns about the loop electrosurgical excision process had been noted in 7–10% of women who had received treatment; 50–70% of these complications were related to intra- or post-operative bleeding, many of which were manageable [40, 41]. Infection with HIV is coupled with higher D-dimer and thrombin-antithrombin levels in plasma, indicating a coagulation disorder [42, 43]. When HIV-infected women are referred for surgical intervention, the loop electrosurgical excision procedure is probably the best operational alternative to therapy for cervical intraepithelial neoplasia.
In conclusion, our study delivered a detailed epidemiological and clinical profile of HPV prevalence and cervical lesions among women living with HIV in Guangxi, China. HPV16, 18, 52, and 58 were the predominant prevalent genotypes. The loop electrosurgical excision procedure serves as a primary modality of treatment for cervical intraepithelial neoplasia. Furthermore, we demonstrated that HIV infection has a significant impact on cervical cancer susceptibility, which arises early in life due to chronic HPV infection. Our findings suggest that HIV infection could facilitate transmission of HPV, and high-risk HPV infection increases vulnerability to infection with multiple genotypes.
This study has several limitations. Observational studies conducted retrospectively have inherent limitations. The order of the HIV and HPV infection in this study is unclear. Additionally, the cohort lacks information on out-of-hospital deaths, HPV vaccination, and clinical treatment variables.
Data availability
The datasets supporting the conclusions of this article are included within the article.
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Funding
This study was funded by the Research and Development of Special, the Nanning Science and Technology Bureau (Grant No: 20223052).
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D. B. and X. T. Conceptualization ; D. B. and X. L. Methodology; X. L. D. B. and S. W. Investigation; D. B. and S. W. Writing – Original Draft; X. T. and X. L. Writing – Review & Editing; X. T. Funding Acquisition; D. B. and X. T. Resources; X. T. and S. W. Supervision. The released version of the work has been reviewed and approved by all authors.
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Bi, D., Wei, S., Luo, X. et al. Management for persistent HPV infection and cervical lesions among women infected with HIV: a retrospective observational cohort study. Virol J 21, 133 (2024). https://doi.org/10.1186/s12985-024-02405-y
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DOI: https://doi.org/10.1186/s12985-024-02405-y