ABSTRACT
Bipolar disorder (BD) is a debilitating psychiatric disorder and a growing global public health issue. Notwithstanding BD has been conceptualized as a neuroprogressive illness, there are some evidences to suggest a role for neurodevelopmental pathways in the patho-etiology of this disorder. Evidences on the associations between perinatal infections and risk for bipolar disorder have been inconsistent across studies. Here, we performed a systematic review of observational studies on the relationship between exposure to perinatal pathogens and bipolar disorder. A computerized literature search of the PubMed, Embase, and PsyINFO databases till January 31(st), 2015 was performed. Twenty-three studies ultimately met inclusion criteria. Studies investigated exposure to several pathogens namely Cytomegalovirus (CMV), Epstein-Barr Virus (EBV), Herpes simplex virus-1 (HSV-1), Herpes simplex virus-2 (HSV-2), Human herpesvirus 6 (HHV-6), Toxoplasma gondii, Influenza, and Varicella zoster virus (VZV). Overall, studies provided mixed evidences. Thus, contrary to schizophrenia, the role of perinatal infections as risk factors for BD remain inconclusive. Larger studies with a prospective design would be necessary to elucidate the role of previous exposure to infectious agents as a potential risk factor for BD.
Subject(s)
Bipolar Disorder/etiology , Communicable Diseases/complications , Adult , Female , Humans , Male , Middle AgedABSTRACT
AIMS: To investigate the in vitro antiviral activity of Distictella elongata (Vahl) Urb. ethanol extracts from leaves (LEE), fruits (FEE), stems and their main components. METHODS AND RESULTS: The antiviral activity was evaluated against human herpesvirus type 1 (HSV-1), murine encephalomyocarditis virus (EMCV), vaccinia virus Western Reserve (VACV-WR) and dengue virus 2 (DENV-2) by the 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric assay. LEE presented anti-HSV-1 [EC(50) 142.8 ± 5.3 µg ml(-1); selectivity index (SI) 2.0] and anti-DENV-2 activity (EC(50) 9.8 ± 1.3 µg ml(-1) ; SI 1.5). The pectolinarin (1) isolated from LEE was less active against HSV-1 and DENV-2. A mixture of the triterpenoids ursolic, pomolic and oleanolic acids was also obtained. Ursolic and oleanolic acids have shown antiviral activity against HSV-1. A mixture of pectolinarin (1) and acacetin-7-O-rutinoside (2) was isolated from FEE and has presented anti-DENV-2 activity (EC(50) 11.1 ± 1.6 µg ml(-1) ; SI > 45). Besides the antiviral activity, D. elongata has disclosed antioxidant effect. CONCLUSIONS: These data shows that D. elongata has antiviral activity mainly against HSV-1 and DENV-2, besides antioxidant activity. These effects might be principally attributed to flavonoids isolated. SIGNIFICANCE AND IMPACT OF THE STUDY: Distictella elongata might be considered a promising source of anti-dengue fever phytochemicals.
