The Chinese herbal prescription JieZe-1 inhibits caspase-1-dependent pyroptosis induced by herpes simplex virus-2 infection in vitro / 中西医结合学报

OBJECTIVE@#JieZe-1 (JZ-1), a Chinese herbal prescription, has an obvious effect on genital herpes, which is mainly caused by herpes simplex virus type 2 (HSV-2). Our study aimed to address whether HSV-2 induces pyroptosis of VK2/E6E7 cells and to investigate the anti-HSV-2 activity of JZ-1 and the effect of JZ-1 on caspase-1-dependent pyroptosis.@*METHODS@#HSV-2-infected VK2/E6E7 cells and culture supernate were harvested at different time points after the infection. Cells were co-treated with HSV-2 and penciclovir (0.078125 mg/mL) or caspase-1 inhibitor VX-765 (24 h pretreatment with 100 μmol/L) or JZ-1 (0.078125-50 mg/mL). Cell counting kit-8 assay and viral load analysis were used to evaluate the antiviral activity of JZ-1. Inflammasome activation and pyroptosis of VK2/E6E7 cells were analyzed using microscopy, Hoechst 33342/propidium iodide staining, lactate dehydrogenase release assay, gene and protein expression, co-immunoprecipitation, immunofluorescence, and enzyme-linked immunosorbent assay.@*RESULTS@#HSV-2 induced pyroptosis of VK2/E6E7 cells, with the most significant increase observed 24 h after the infection. JZ-1 effectively inhibited HSV-2 (the 50% inhibitory concentration = 1.709 mg/mL), with the 6.25 mg/mL dose showing the highest efficacy (95.76%). JZ-1 (6.25 mg/mL) suppressed pyroptosis of VK2/E6E7 cells. It downregulated the inflammasome activation and pyroptosis via inhibiting the expression of nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing protein 3 (P < 0.001) and interferon-γ-inducible protein 16 (P < 0.001), and their interactions with apoptosis-associated speck-like protein containing a caspase recruitment domain, and reducing cleaved caspase-1 p20 (P < 0.01), gasdermin D-N (P < 0.01), interleukin (IL)-1β (P < 0.001), and IL-18 levels (P < 0.001).@*CONCLUSION@#JZ-1 exerts an excellent anti-HSV-2 effect in VK2/E6E7 cells, and it inhibits caspase-1-dependent pyroptosis induced by HSV-2 infection. These data enrich our understanding of the pathologic basis of HSV-2 infection and provide experimental evidence for the anti-HSV-2 activity of JZ-1. Please cite this article as: Liu T, Shao QQ, Wang WJ, Liu TL, Jin XM, Xu LJ, Huang GY, Chen Z. The Chinese herbal prescription JieZe-1 inhibits caspase-1-dependent pyroptosis induced by herpes simplex virus-2 infection in vitro. J Integr Med. 2023; 21(3): 277-288.

Protective effects of bicistronic DNA vaccines of herpes simplex virus type 2 glycoprotein D and adjuvant CCL28 on mice / 中华微生物学和免疫学杂志

Objective:To study the protective effects of bicistronic DNA vaccines carrying herpes simplex virus type 2 glycoprotein D (HSV-2 gD) and adjuvant CCL28 sequences that were connected by internal ribosome entry site (IRES) sequence in mouse model.Methods:The recombinant DNA vaccines, pgD-IRES-CCL28 and pCCL28-IRES-gD, encoding HSV-2 gD and adjuvant CCL28 were constructed with IRES sequence. After verified by sequencing, they were intramuscularly injected twice into BALB/c mice. Serum samples and vaginal lavage fluids were collected regularly. Splenocytes, mesenteric lymph node cells and rectal mucosa tissues were separated and collected. The titers of antigen-specific antibodies in immunized mice were analyzed with end-point ELISA. In vitro neutralization assay was used to measure neutralizing antibody titers in serum and vaginal lavage fluid after vaccination and virus challenge. CCL28-responsive immune cells in splenocytes, mesenteric lymph node cells and rectal tissues were detected by chemotaxis experiment and immunohistochemical staining. The protective effects of the bicistronic DNA vaccines were evaluated by fluorescent quantitative PCR, weighing and disease severity assessment. Humoral and cellular immune responses induced by the bicistronic DNA vaccines and their efficacy in immunoprotection were analyzed by comparing with pgD+ pCCL28 group. Results:IgG titers in serum samples and IgA antibody titers in vaginal lavage fluids of mice immunized with pCCL28-IRES-gD were similar to those in pgD+ pCCL28 group. The neutralizing ability of antibodies, the number of rectal mucosal IgA+ plasma cells and CCL28-responsive immune cells in mucosal tissues were increased in pCCL28-IRES-gD group. Serum neutralizing antibodies were not produced immediately in the mice challenged with HSV-2, but no weight loss, disease symptoms or death was observed. However, pgD+ pcDNA3.1 and pgD-IRES-CCL28 were ineffective against HSV-2 infection in mice.Conclusions:The recombinant bicistronic DNA vaccine of pCCL28-IRES-gD could induce stronger mucosal immune response in mice and provide better protective effects.

Protective effects of fusion recombinant DNA vaccine of herpes simplex virus type 2 glycoprotein D and adjuvant CCL19 on mice / 中华微生物学和免疫学杂志

Objective:To compare the immune responses to simply mixed and fused recombinant DNA vaccines of herpes simplex virus type 2 glycoprotein D (HSV-2 gD) and molecular adjuvant CCL19 in mice and to evaluate the protective effects.Methods:Gene recombination technology was used to construct recombinant DNA vaccines expressing HSV-2 gD and CCL19 alone or fused together. After verification by sequencing, Western blot and ELISA, BALB/c mice were immunized twice by intramuscular injection. Serum samples and vaginal lavage fluids were collected regularly after immunization. Splenocytes, mesenteric lymph node cells and rectal tissues were collected after immunization. Differences in humoral and cellular immune responses to the two forms of vaccines and their protective effects in mice were analyzed using end-point ELISA, in vitro neutralization assay, immunohistochemical staining, chemotaxis assay, vaginal virus challenge, fluorescence quantitative PCR, weighing and disease severity assessment. Results:The fused recombinant pgD-IZ-CCL19 plasmid could express gD protein and CCL19 protein in vitro, but the level of expressed CCL19 protein by pCCL19-IZ-gD plasmid was less than that by pgD-IZ-CCL19. The mice immunized with pgD-IZ-CCL19 showed higher levels of IgG in sera and IgA in vaginal lavage fluids ( P<0.01) and stronger neutralization ability than the mice vaccinated with pgD+ pCCL19. Compared with other groups, more lymphocytes were recruited in the rectal mucosa, the spleen and mesenteric lymph nodes of mice immunized with pgD-IZ-CCL19. Weight loss or disease symptoms were not observed in the pgD-IZ-CCL19 group after virus challenge. In addition, the positive rate of HSV-2 in vaginal mucosa and the mortality rate in the pgD-IZ-CCL19 group were the lowest. However, pCCL19-IZ-gD turned out ineffective in preventing HSV-2 infection. Conclusions:The fused recombinant DNA vaccine pgD-IZ-CCL19 could induce stronger immune responses in mice and provide better protective effects, which was superior to the simply mixed DNA vaccine.

Seroprevalence of Herpes Simplex Virus Type 2 and Associated Risk Factors among Undergraduate Female Students of Babcock University Nigeria

Background: Herpes simplex virus type 2 (HSV-2) causes genital herpes, a chronic viral infection that is sexually transmitted and often results in genital ulcer disease (GUD) worldwide.Aim: The aim of this study was to determine the prevalence of herpes simplex virus type 2 (HSV-2) IgG and IgM antibodies and the associated risk factors among undergraduate female students of Babcock University.Methods: After ethical approval was obtained, serum samples of 150 consenting female participants (16-35 years) were collected randomly and screened using NADALR HSV-2 IgG/IgM Rapid Antibody Test Cassette (Bulgarian Company for Biotechnology, Sofia, Bulgaria). The demographic and clinical information of the participants were also collected using a structured questionnaire. The results were statistically analyzed using the SPSS version 18.0.Results: The outcome of the study shows that out of the 150 participants screened, 5 (3.3%) were positive for HSV-2 IgG antibody, 4 (2.7%) were positive for HSV-2 IgM; while 2 (1.3%) were positive for both HSV-2 IgG and IgM antibodies. There were no significant differences (P>0.05) in the seropositivity for HSV-2 IgG and IgM antibodies among the study participants on the basis of age distribution. With regards to clinical indication for genital herpes in relation to seropositivity of HSV-2 IgG and IgM antibodies among the study participants, none of the 7 (4.6%) who indicated vaginal itching was seropositive for either HSV-2 IgG or HSV-2 IgM or both. On the other hand, genital lesions were recorded in 0.7% HSV-2 IgG seropositive, 1.3% HSV-2 IgM seropositive and 0.7% HSV-2 both IgG and IgM seropositive. Genital ulcer was recorded among two participants who were either seropositive for HSV-2 IgG (0.7%) or HSV-2 IgM (0.7%). Only one (0.7%) participant indicated inguinal lymphadenopathy, however, the person was HSV-2 IgG/IgM seronegative. Identifiable risk factor significantly (P<0.05) associated with HSV-2 infection include: history of sexually transmitted infections, HIV positive status, and change of sex partners recently.Conclusion: The outcome of this study shows that HSV-2 infection exists among undergraduate female students of Babcock University, Nigeria and therefore appropriate public health measures must be taken to halt the cycle of infection within the University community. Early detection of genital herpes and prompt treatment will help prevent subsequent complications such as genital ulcer disease among young female adults.

Analysis on AIDS related knowledge, high-risk behaviors and STDs infection status of whoremasters in Kaiyuan City, Yunnan Province / 中华疾病控制杂志

@# Objective To understand the awareness of AIDS related knowledge, high risk behaviors, the infection status of HIV, syphilis and HSV-2, and to explore the associated factors with HSV-2 infection among whoremasters in Kaiyuan City, so as to provide scientific evidence for targeted intervention to prevent and control HIV and other STDs. Methods A self-designed questionnaire survey was conducted among whoremasters recruited through outreach activities and snowball sampling. The blood and urine were also collected for corresponding laboratory examination. Results Among the whoremasters, 98.22% had a high awareness of AIDS related knowledge, 9.33% once used drugs, and 14.67% did not use a condom during the latest commercial sex. 62.22% of the whoremasters ever had non-marital sex partners, and of those who had sex with non-marital sex partners in the past year, 59.55% reported using condoms inconsistently. The total infection rate of HIV/syphilis/HSV-2 was 18.22% and the infection rates of HIV, syphilis and HSV-2 were 3.11%, 1.33% and 16.44%, respectively. The older whoremasters were more likely to have a higher HSV-2 infection rate (AOR=1.044,95%CI:1.016-1.073,P=0.002), and those whoremasters not using a condom during the latest commercial sex were more likely to have a higher HSV-2 infection rate (AOR=3.125,95%CI:1.229-7.945,P=0.017). Conclusions Though whoremasters in Kaiyuan City had a high awareness of AIDS related knowledge, they had high-risk behaviors and relatively high HIV and other STDs infection rates. Targeted interventions are needed to improve the risk awareness of STDs infection to promote consistent condom use in both commercial and non-marital sexual behaviors among whoremasters.

Third nerve palsy as an isolated manifestation of herpes simplex virus type 2 meningitis in a patient with chronic lymphocytic leukaemia

@#Isolated third nerve palsy as the sole manifestation of meningitis is rare. We describe a patient with chronic lymphocytic leukemia who developed third nerve palsy due to HSV2 meningitis. HSV2 PCR was positive in CSF and the patient was partially recovered upon treatment with acyclovir

Detección del virus herpes simple tipo 2 en mujeres indígenas del estado Zulia / Detection of herpes simplex type 2 in indian women state Zulia

El virus herpes simple tipo 2 (VHS-2), es una infección de transmisión sexual prevalente en el mundo a pesar de los avances diagnósticos y terapéuticos. Según estimaciones en el 2012, se calculaba que existían 417 millones de personas infectadas en todo el mundo. El objetivo de este proyecto fue detectar el VHS-2 en mujeres indígenas del estado Zulia, para ello se seleccionaron 100 mujeres de las etnias wayúu y añú sin discriminar edad y/o paridad. El médico procedió a realizar la toma de muestras con un hisopo de alginato, para el procesamiento de las mismas se utilizó el método de Reacción en Cadena de la Polimerasa (PCR) para detectar el VHS-2, en muestras de origen cérvico-uterino, y el diagnostico citológico se realizó a través de la coloración con hematoxilina- eosina. Se obtuvo un 22% de muestras positivas para VHS-2, los hallazgos obtenidos, demuestran que un porcentaje considerable de las pacientes presentan infección por el VHS- 2, siendo este de suma importancia debido a que el mismo puede contribuir a la progresión de procesos inflamatorios persistentes.

The herpes simplex virus type 2 (HSV-2) is a sexually transmitted infection prevalent in the world; in spite of despite diagnostic and therapeutic advances. According to estimates in 2012, it was calculated that there were 417 million people infected worldwide. The objective of this project was to detect HSV-2 in indigenous women of the Zulia state, for that 100 women of the Wayúu and Añú ethnic groups, were selected without discriminating age and/or parity. The physician proceeded to sample with an alginate swab, for the processing of the same was used the polymerase chain reaction (PCR) method to detect HSV-2 in samples of cervical-uterine origin, and cytological diagnosis was made through staining with hematoxylin-eosin. 22% of HSV-2 positive samples were obtained, the results show that a considerable percentage of patients present HSV-2 infection, which is extremely important because it can contribute to the progression of processes inflammatory agents.

HSV-2 infection and associated factors among people participating premarital physical examination from 2013 to 2014 in Minhang District of Shanghai / 复旦学报（医学版）

Objective To explore herpes simplex virus type 2 (HSV-2) infection and associated factors among people participating premarital physical examination in 2013-2014 in Minhang District of Shanghai.Methods During 2013 to 2014,people participating premarital physical examination in Minhang District were interviewed with questionnaire regarding HIV/AIDS related Knowledge,sexual behaviors,etc.Blood samples were collected to detect HIV,HSV-2 and syphilis.Results A total of 2 116 participants were investigated,among which 92 were infected with HSV-2,with a prevalence rate of 4.35％.The HSV-2 infection rates were 3.69％ and 5.01％ for male and female,respectively.Multivariate logistic regression analysis showed that for the males,education level of high school and below (OR=2.47,95％CI:1.195-5.108),fiancee infected with HSV-2 (OR=9.29,95％CI:4.279-20.164) were more susceptible to HSV-2.For the females,aged above 25 years (OR=9.29,95％CI:4.279-20.164),census register of other cities in China (OR =2.19,95％CI:1.091-4.378),education level of high school and below (OR =3.37,95％CI:1.721-6.596),never used condoms (OR =3.45,95％CI:1.265-9.392),fiance infected with HSV-2 (OR =8.46,95％CI:3.700-19.351) were more susceptible to HSV-2.Conclusions The prevalence of HSV-2 among premarital population is relatively low in Minhang District.However,low condom use rate leads to an increase in the risk of HSV-2 infection when either partner infected with HSV-2,suggesting increasing condom use between affianced couples.

HSV-2 infection and associated factors among people participating premarital physical examination from 2013 to 2014 in Minhang District of Shanghai / 复旦学报（医学版）

Objective To explore herpes simplex virus type 2 (HSV-2) infection and associated factors among people participating premarital physical examination in 2013-2014 in Minhang District of Shanghai.Methods During 2013 to 2014,people participating premarital physical examination in Minhang District were interviewed with questionnaire regarding HIV/AIDS related Knowledge,sexual behaviors,etc.Blood samples were collected to detect HIV,HSV-2 and syphilis.Results A total of 2 116 participants were investigated,among which 92 were infected with HSV-2,with a prevalence rate of 4.35％.The HSV-2 infection rates were 3.69％ and 5.01％ for male and female,respectively.Multivariate logistic regression analysis showed that for the males,education level of high school and below (OR=2.47,95％CI:1.195-5.108),fiancee infected with HSV-2 (OR=9.29,95％CI:4.279-20.164) were more susceptible to HSV-2.For the females,aged above 25 years (OR=9.29,95％CI:4.279-20.164),census register of other cities in China (OR =2.19,95％CI:1.091-4.378),education level of high school and below (OR =3.37,95％CI:1.721-6.596),never used condoms (OR =3.45,95％CI:1.265-9.392),fiance infected with HSV-2 (OR =8.46,95％CI:3.700-19.351) were more susceptible to HSV-2.Conclusions The prevalence of HSV-2 among premarital population is relatively low in Minhang District.However,low condom use rate leads to an increase in the risk of HSV-2 infection when either partner infected with HSV-2,suggesting increasing condom use between affianced couples.

Anti-herpes simplex virus activities of monogalactosyl diglyceride and digalactosyl diglyceride from Clinacanthus nutans, a traditional Thai herbal medicine

Objective: To evaluate the monogalactosyl diglyceride (MGDG) and digalactosyl diglyceride (DGDG) from Clinacanthus nutans (C. nutans) for their in vitro antiviral activities against herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) by plaque reduction assay. Methods: MGDG and DGDG were extracted with chloroform from C. nutans leaves. MGDG and DGDG were separated from chloroform crude extract using column chromatography, characterized by thin layer chromatography and quantified by high performance liquid chromatography. The anti HSV-1 and 2 activity against pre-treatment and post-treatment of the compounds was evaluated using plaque reduction assay. The cytotoxicity of the extract and the compounds on Vero cells were performed by MTT assay. Results: MGDG and DGDG obtained by column chromatography showed identical profiles as standard MGDG and standard DGDG using thin layer chromatography and high performance liquid chromatography. MGDG and DGDG from C. nutans showed 100% inhibition of HSV-1 replication at the post step of infection at noncytotoxic concentration with IC

Clinical Characteristics in Herpes Simplex Virus 2 Meningitis in a Retrospective Single Center Study

BACKGROUND: Herpes simplex virus type 2 (HSV-2) is the second most common cause of viral meningitis and the most common cause of recurrent meningitis. Although the incidence of HSV-2 meningitis is high, its clinical characteristics are not well known. The purpose of this study was to review the clinical characteristics and prognosis of HSV-2 meningitis. METHODS: We analyzed patients who were admitted to the Department of Neurology at Severance Hospital with a final diagnosis of HSV-2 meningitis, as confirmed by applying the polymerase chain reaction to the cerebrospinal fluid (CSF) of patients. RESULTS: The study involved 998 patients with aseptic meningitis and 60 patients diagnosed with HSV-2 meningitis. The mean age at meningitis presentation was 32.5 years (range 18-54 years), and 72% of the patients were female. Common clinical symptoms were headache (100%), nausea and/or vomiting (83%), meningismus (57%), and fever (55%). Six patients had a history of genital herpes infection, and 11 had a past history of recurrent meningitis. The CSF study was notable for elevated protein (111.0±53.5 mg/dL, mean±standard deviation) and white cell count (332.0±211.3 cells/µL). The CSF/serum glucose ratio was 0.52±0.90. Various treatments were applied, including conservative care, antiviral agents, empirical antibiotics, and combined treatments. All patients recovered without serious neurologic sequelae. CONCLUSIONS: HSV-2 meningitis is relatively common, as are recurrent episodes. The clinical characteristics of HSV-2 meningitis are similar to those of other types of aseptic meningitis. HSV-2 meningitis is treated using antiviral therapy, and the prognosis is favorable even with conservative treatment.

Production of a fragment of glycoprotein G of herpes simplex virus type 2 and evaluation of its diagnostic potential

<p><b>INTRODUCTION</b>Herpes simplex virus type 2 (HSV-2) is the most common cause of genital herpes. Glycoprotein G (gG) is a prototype antigen for type-specific serodiagnosis distinguishing between HSV type 1 (HSV-1) and HSV-2 infections. As immunological diagnosis kits for accurate differentiation between HSV-1 and HSV-2 antibodies can be expensive, there is a need to develop a convenient, sensitive, specific and cost-effective serodiagnostic kit.</p><p><b>METHODS</b>We successfully expressed a fragment of gG comprising residues 321-580 of HSV-2 with histidine tag (gG(321-580His)) in a Bac-to-Bac baculovirus expression system, which had an antigenicity similar to its native counterpart. An indirect enzyme-linked immunosorbent assay (ELISA) was developed using gG(321-580His) as the diagnostic antigen and evaluated by comparison with a commercial HerpeSelect 2 ELISA immunoglobulin G kit as reference.</p><p><b>RESULTS</b>In testing 318 field serum samples, the diagnostic relative sensitivity and specificity of the developed gG(321-580His)-ELISA test in qualitative comparison with the commercial kit were 93.81% and 96.74%, respectively, and the accuracy was 94.65%.</p><p><b>CONCLUSION</b>The study indicates that gG(321-580His) has a high diagnostic potential for HSV-2 virus serodiagnosis in humans.</p>

The interference effects on UL29 shRNA expression vectors on HSV-2 / 实用医学杂志

Objective To construct short hairpin RNA (shRNA) recombinant expression vector for herpes simplex virus typeⅡ(HSV-2) UL29 gene and observe its inhibitory effect on HSV-2. Methods Four interference target sites of HSV-2UL29 gene were selected to construct 4 groups of small hairpin RNA respectively,named shRNA recombinant expression vector. The expression vectors were transfected into HEK293 cells with liposome. HEK293 cells were infected with HSV-2 after expression vector being transfected. The viral titer was estimated by end-point titration assay. The level of transcription was estimated by Real-Time PCR method. The expressing effect of protein was detected by Western-blot. Results Recombinant expression vector pGPU6/GFP/Neo-shRNA was constructed successfully. The result of end-point titration assay showed that the viral titer was reduced comparing with blank control (P<0.05). The result of RT-PCR showed that inhibition rates were respectively 28.80%, 59.95%, 66.08%and 36.27% comparing with blank control, and there were significant differences (P < 0.05). The effect of UL29shRNA1461 group was the best one. The result of Western-blot showed that the expressing quantity of ICP8 was reduced. Conclusion Recombinant expression vector pGPU6/GFP/Neo-shRNA can interfere HSV-2 UL29 gene expression from different cell level in vitro, which can inhibit the replication of HSV-2 genome in HEK293 cells. Thus, RNA interference (RNAi) is conducive to the further exploration of viral therapy.

Neonatal Meningoencephalitis caused by Herpes Simplex Virus Type 2 / 소아감염

Despite its rare occurrence, early diagnosis and appropriate treatment for neonatal herpes simplex virus infection are mandatory due to its high morbidity and mortality. In Korea, there has been no epidemiologic data on neonatal herpes simplex virus infection, and even case reports are rare. We observed a 16-day-old neonate who presented with fever and seizures. We diagnosed her with meningoencephalitis caused by herpes simplex virus type 2 based on the polymerase chain reaction test, and treated her with intravenous acyclovir and anticonvulsants. The seroprevalence of herpes simplex virus type 2 sharply increases in women in their 30s, and the average age for childbirth has increased to older than 30 years of age in Korea; we therefore expect that the incidence of neonatal herpes simplex virus type 2 infection will rise in Korea, and more attention should be directed to neonatal herpes simplex virus type 2 infection. We report this newborn patient's case along with a literature review.

Incidence of herpes simplex virus type 2 in young reproductive age women in Mysore, India.

Context: There are sparse data on herpes simplex virus type 2 (HSV-2) infection in India. HSV-2 is one of the most common sexually transmitted infections and the primary cause of genital ulcer disease worldwide. Aim: The aim of this study is to describe the incidence of HSV-2 infection among young reproductive age women in Mysore, India. Setting and Design: Between October 2005 and April 2006, 898 women were enrolled into a prospective cohort study in Mysore, India, and followed quarterly for 6 months. Materials and Methods: An interviewer administered questionnaire was used to collect demographic and social risk factors, and physical examination was conducted for collection of biological specimens to screen for reproductive tract infections at each visit. Serologic testing was conducted for the presence of HSV-2 antibodies using HerpeSelect HSV-2 enzyme-linked immunosorbent assay. Statistical Analysis Used: Data were analyzed using R. Incidence density rates were calculated using Poisson distributions with person-time of follow-up as denominator. Person-time was calculated as time from enrollment until time of first positive HSV-2 test. Results: There were 107 women with HSV-2 antibodies leaving 700 women with negative results at enrollment. The analysis included 696 out of which, there were 36 HSV-2 seroconversions during the study period. The study cohort accumulated roughly 348 woman-years of follow-up, yielding an HSV-2 acquisition rate of 10.4 cases/100 woman-years. All detected infections were asymptomatic. Conclusions: HSV-2 incidence is moderate in this community sample of young reproductive age monogamous women. More research is needed to establish incidence estimates in different Indian settings.

Meta-analysis on the incidence and risk factors of herpes simplex virus type 2 infection / 中华流行病学杂志

Objective To determine the global incidence and risk factors of herpes simplex virus type 2 (HSV-2). Methods Meta-analysis was performed to systematically and quantitatively review all the original research papers and reports that were published in 1990-2010 on the global incidence of HSV-2. Pooled incidence, pooled hazard ratios, publication bias, heterogeneity and sensitivity analysis for those studies were calculated or conducted using Stata 10.0. Results HSV-2incidence varied considerably across different countries, regions and/or populations, with a range from 1.0 to 23.1/100 person-years (PYs). Africa and United States were highly epidemic with HSV-2 while females and HIV-infected people were at higher risk of HSV-2 infection, whereas HSV-1 infection status was not significantly associated with acquisition of HSV-2 infection. Conclusion HSV-2incidence varied considerably among countries, regions and populations, which called for different and tailored control strategies. More research was also needed in China to examine the HSV-2 incidence and risk factors in different regions and populations.

Eccema herpético por virus herpes simplex tipo 2: revisión de la literatura a propósito de un caso / Eczema herpeticum caused by herpes simplex virus type 2: review of the literature about one case

Eczema herpeticum is an extensive vesicular eruption caused by cutaneous dissemination of herpes simplex virus in patients who have underlying skin conditions or epidermal barrier disruption. Herpes simplex virus type 1 (HSV 1) is the most common etiology. This is the first report in Chile of a case of eczema herpeticum caused by HSV 2 in a patient with Darier' s disease, We review the literature and emphasize the use of sensitive and specific assays as real time polimerase chain reaction, that allow to initiate timely the correct treatment.

El eccema herpético es una erupción vesicular extensa causada por la diseminación cutánea del virus herpes simplex, en pacientes con trastornos cutáneos previos o daño de la barrera epidérmica. La etiología más frecuente es virus herpes simplex tipo 1 (VHS 1), aunque se han reportado casos de virus herpes simplex tipo 2 (VHS 2). Presentamos el primer reporte en Chile de eccema herpético por VHS 2 en un paciente con enfermedad de Darier. Realizamos una revisión de la literatura médica y destacamos la importancia del uso de técnicas sensibles y específicas como la reacción de polimerasa en cadena (RPC) en tiempo real, que posibilitan el inicio precoz de la terapéutica correcta.

Quantification of ICP4 Gene of Herpes Simplex Virus Type 2 with Real-time Fluorescent Quantitative Polymerase Chain Reaction / 医学研究杂志

Objective To establish a fluorescent quantitative polymerase chain reaction method for quantifying the ICP4 gene expression of herpes simplex virus type 2(HSV2).Methods According to the HSV2 ICP4 gene sequence,we designed and synthesized PCR primer.The purified PCR product was sequenced after connecting with pMD-18 T plasmid.According to the sequence assay results,the primer and probe of fluorescent quantitative PCR was designed and synthesized.Standard recombinant plasmid extracted from the positive bacteriumclone was used as standard substance.The plasmid as standard substance was diluted for 10 times,then PCR reaction proceeded.The sensitivity and dependability of the real-time fluorescent quantitative PCR were analyzed.Results The sequence result indicated that there was non-sense mutation of A-G and T-C.And the detection sensitivity was 101 copy.The Ct value were 14.275土0.137,17.988?0.162,22.081土0.259,25.957土0.345,29.565?0.203,33.269土0.287,37.737?0.698,respectively with 107~ 101 copies/?l.The coefficient of variability were 0.965%,0.902%,1.174%,1.329%,0.686%,0.862% and1.851%,respectively.There was a good linear function in statistics between the Ct value and the concentration gradient of standard plasmid DNA specimen.The coefficient of regression was 0.998.Conclusion The method of quantification of ICP4 gene of HSV2 with real-time fluorescent quantitative PCR is successfully established,and the method has good sensitivity and dependability,which can be used to quantitative detecting HSV2 ICP4.

Expression and Antigenic Analysis of the Recombinant Epitope of Herpes Simplex Virus Type 2 Glycoprotein G / 中国生物工程杂志

A fragment containing amino acid residues 561～578 of HSV-2 glycoprotein G(gG2) was obtained by PCR assembling technique,and doubly cloned into vector pET-KDO.The recombinant plasmid was transformed to BL21(DE3)plysS.Fusion protein,of molecular weight about 39kDa was highly expressed by induction of IPTG.Western blot result showed the fusion protein had good antigenicity.After putification and digestion,the purity reached 95%.The digested purified protein was analysed by ELISA and showed good sensitivity and specificity.The recombinant protein should be useful for type-specific serodiagnosis of HSV-2.

Development of the Enzyme Immunoassay for the Detection of Anti-HSV-2 Antibody with HSV-2 Specific Monoclonal Antibody / 감염

BACKGROUND: The serological diagnosis of herpes simplex virus type 2 (HSV-2) infection has pitfalls, in that most of the antibodies against HSV-2 cross-react with HSV-1 and the prevalence of HSV-1 infection is high, especially in Korea. In this study, we tried to establish the serological diagnostic method, which could detect and measure the specific antibodies against HSV- 2 by competitive immunofluorescent staining method as well as competitive ELISA based on the specific monoclonal antibody, MH2-7. METHODS: Immunofluorescent staining and western blot analysis were used to characterize the antigens recognized by MH2-7. Competitive immunofluorescent staining (IF), competitive enzyme immunoassay (ELISA), and western blot analysis were used to detect specific antibodies against HSV-2 in patients' sera. RESULTS: In western blot analysis, the sera from two of six patients clinically diagnosed as genital herpes showed characteristic band patterns, which have been known to be compatible with HSV-2 infection. In competitive immunofluorescent staining, only the sera from the two patients clinically diagnosed as genital herpes and with characteristic band pattern showed competition with MH2-7 monoclonal antibody. The dilution range of the serum showing specific competition was between 1:10 and 1:80. Competitive ELISA was also performed and evaluated as the diagnostic efficacy as ELISA has been known to be advantageous over IF staining in mass screening. The result showed linear dose-response relationship for the patient's sera in inhibition of the reactivity of MH2-7. CONCLUSION: We suggest that the competitive immunofluorescent staining method and competitive ELISA based on the specific monoclonal antibody MH2-7 is a simple, accurate, and precise method, which can be used in serological diagnosis of HSV-2 infection.