Anti-HSV type 2 Polyclonal antibody

Objectives: Evidence on the association between herpes simplex virus (HSV) and excessive adiposity, such as obesity (body mass index >= 30 kg/m(2)) and abdominal obesity (waist circumference (WC) > 102 or 88 cm), has been inconsistent. We sought to examine whether age-period-cohort (APC) effects could explain for the observed heterogeneities. Design: Population-based cross-sectional study. Participants: Adults aged 20-49 years with available serological data in the National Health and Nutrition Examination Survey (NHANES) in 1999-2012. Exposure measures: Obesity and abdominal obesity. Results: In men, excessive adiposity was generally not associated with HSV1 or HSV2 (all p> 0.05); however, there were positive correlations between HSV seroprevalence and excessive adiposity in certain age and birth cohort groups. Based on APC analysis, abdominally obese men aged 30-40 years showed a nearly 20% increase in risk for HSV1 seropositivity (adjusted prevalence ratio (aPR)= 1.18; 95% CI 1.10 to 1.27) as compared with abdominally non-obese men of the same age; there was no such association in men of other age groups. Also, men of a large WC who were born before 1962 or after 1979 had a 28% higher risk for HSV2 seropositivity than those of a normal WC in the same birth cohorts (aPR= 1.28, 95% CI 1.17 to 1.54); yet the association did not hold for men in other cohorts (aPR= 0.86, 95% CI 0.64 to 1.17). In women, a large WC was correlated with a minimally increased HSV1 seroprevalence (aPR= 1.07, 95% CI 1.01 to 1.13) but not with HSV2 seropositivity (aPR= 1.13; 95% CI 0.99 to 1.28). Likewise, there were strong associations between abdominal obesity and HSV2 seropositivity in subgroups of women participating in the earliest survey cycle (aPR= 1.41, 95% CI 1.12 to 1.78) but not in other survey periods (aPR= 0.94, 95% CI 0.85 to 1.03). Conclusions: There was no consistent evidence for strong associations between HSV seropositivity and excessive adiposity in adults. APC analysis results further cautioned the generalisability of previous reports based on 1 or 2 cycles of survey data.

Molecular modelling studies of complexes of 2-phenylamino-6-oxopurines and HSV1 thymidine kinases (TK) revealed two distinct modes of binding. The "acyclovir mode" was occupied by 9R (9-substituted) compounds, and was identical to that revealed by crystal structures of acyclovir and 2-phenylamino-9-(4-hydroxybutyl)-6-oxopurine (HBPG) bound to HSV1 TK. The "base mode" was occupied by 9H compounds such as 2-[3-(trifluoromethyl)phenylamino]-6-oxopurine (m-CF(3)PG), and is characterized by rotation of the inhibitor by 180 degrees around the minor axis of the purine ring. In an attempt to understand the molecular basis for affinity of 2-phenylamino-6-oxopurines for TKs, we cloned and expressed site-directed HSV2 TK mutants to create proteins with inhibitor-interacting domains identical with those of HSV1 TK. The enzyme kinetic properties and inhibitory action of several 2-phenylamino-6-oxopurines showed that the changes were not consistently correlated with differences in affinity of inhibitors to the TKs.