Human Papillomavirus Type-Specific Prevalence in Women with Cervical Intraepithelial Neoplasm in Western China

Abstract

Human papillomavirus (HPV) type-specific prevalence was studied in 600 cases of cervical intraepithelial neoplasm in western China by GenoArray test. HPV-16 and -58 were the most prevalent types, with prevalences of 37.8% and 21.8%, respectively. HPV-18 and -45 were uncommon types. The results show different type distributions from that of other regions, which is important evidence for the selection of future genotypes in HPV vaccines in western China. Cervical carcinoma is one of the most common malignancies that affect women worldwide. It is developed from a series of precancerous lesions called cervical intraepithelial neoplasm (CIN; graded from 1 to 3). Human papillomavirus (HPV) infection, the most important risk factor for cervical cancer development, can be detected in over 95% of carcinoma tissues (10). More than 100 different HPV genotypes are sequenced, of which about 15 types are called high-risk HPV because of their strong carcinogenic potentials (12). One important approach to prevent cervical cancer and CIN is the prevention of HPV infection by prophylactic vaccination. The currently available HPV vaccines are mainly against HPV-16 and -18 types, since they are the most important genotypes globally (7). However, HPV genotype prevalence varies in different countries or regions. In a previous study, we reported a high prevalence of HPV-16 and -58 in cervical carcinoma patients in western China, suggesting HPV genotype distribution may be quite different from other regions in the world (8). In the present study, we further investigated HPV type-specific prevalence in CIN lesions in a much larger patient population.A total of 600 histologically diagnosed patients with CIN (CIN1, 143 cases; CIN2, 181 cases; and CIN3, 276 cases) were included. These patients visited West China Second Hospital, Sichuan University, one of the largest medical centers in western China, from January 2010 to March 2011. The histological diagnosis was verified by two independent pathologists who were blinded of the HPV status. Cast-off cells were scraped from cervical lesions by using plastic swabs and stored in physiological saline at 4°C until further use. Cervical samples were used for HPV DNA detection and genotyping by GenoArray test (Hybribio Limited, Hong Kong, China) as described previously (9). This kit can simultaneously identify 21 HPV genotypes, including 7 low-risk types (types 6, 11, 42, 43, 44, 53, and 81) and 14 high-risk genotypes (types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66, and 68). Cochran-Armitage trend tests were used, and P values of Ͻ0.05 were considered significant. The attributable fraction of each genotype was estimated, and 95% confidential intervals (CI) were calculated as described before (6).In the 600 CIN patients, the overall HPV infection rate was 80.8%, while that of the high-risk HPV type was 75.8%. As for the types, HPV-16 was the one most frequently found, with a prevalence of 37.8% and an attributable fraction of 34.2%. HPV-58 was the second most common genotype, which was det...

Comparison of human papillomavirus (HPV) detection in urine and cervical swab samples using the HPV GenoArray Diagnostic assay

“…However, the HPV GenoArray Diagnostic Kit is an alternative technique for studies conducted in resource-limited laboratories because the cost of the HPV GenoArray Diagnostic Kit is lower than that of the Linear Array HPV Genotyping Test and the hybridization time is also lower (Li et al, 2012; Liu et al, 2010). Moreover, the HPV GenoArray assay can distinguish and identify HPV 52, which is one of the most common high-risk HPV genotypes in women in eastern and southeastern Asia (Sukvirach et al, 2003; Takehara et al, 2011).…”

Prevalence of and risk factors for high-risk human papillomavirus infection: a population-based study from Hetian, Xinjiang, China

“…The aforementioned study conducted in Urumqi, Xinjiang, found that the HR-HPV genotypes HPV-16, HPV-58, HPV-52 and HPV-18 accounted for 6.03, 2.56, 1.23 and 1.05% of all cases, respectively [18]. Another investigation, performed in Yunnan, China, revealed that the five most prevalent HR-HPV genotypes were HPV-16 (3.4%), HPV-56 (1.7%), HPV-58 (1.4%), HPV-33 (1.2%) and HPV-52 (0.88%), with an HPV-18 prevalence of 0.8% [11]. In both of these prior studies, the HPV-82 genotype was also detected; in our study, only one sample infected with the HPV-82 genotype was found.…”

“…A recent study conducted in Qujing of Yunnan Province, Southwest China, demonstrated that the five most prevalent HR-HPV genotypes in this region were HPV-16 (3.4%), HPV-56 (1.7%), HPV-58 (1.4%), HPV-33 (1.2%) and HPV-52 (0.88%) [10]. However, another study conducted on 600 patients with cervical intraepithelial neoplasm in Western China indicated that HPV-16 and HPV-58 were the most prevalent types of HPV, with prevalences of 37.8% and 21.8%, respectively, and that HPV-18 and HPV-45 were uncommon [11]. Considering that the distribution of HPV genotypes may greatly differ according to geographic region [11], largescale investigations in different regions are still needed.…”

“…However, another study conducted on 600 patients with cervical intraepithelial neoplasm in Western China indicated that HPV-16 and HPV-58 were the most prevalent types of HPV, with prevalences of 37.8% and 21.8%, respectively, and that HPV-18 and HPV-45 were uncommon [11]. Considering that the distribution of HPV genotypes may greatly differ according to geographic region [11], largescale investigations in different regions are still needed. The goal of this study was to investigate the prevalence of HPV infection among women between 15 and 54 years of age in Hetian Prefecture in Xinjiang, China, to describe the epidemiological characteristics of HR-HPV genotypes and establish risk factors associated with these genotypes in this region.…”

Prevention of human papillomavirus (HPV) infection and cervical cancer in China: How does HPV vaccination bring about benefits to Chinese women?

“…Only 6% of women were willing to pay more than US $300 for the vaccine. and safety of the vaccines, cost-effectiveness of cervical cancer prevention and control strategies Sexual behavior of the population, and knowledge and attitudes towards the vaccines and HPV-related diseases are also important (46)(47)(48)(49)(50)(51)(52)(53)(54)(55)(56)(57). In China, the prevalence of HPV 16 and 18, which are prevented by the current vaccines, is generally high, while there is a huge geographic diversity of the prevalence of oncogenic HPV types.…”