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Related Concept Videos

Leaky Scanning02:28

Leaky Scanning

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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
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Flaviviruses proteases.

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    West Nile virus (WNV), Zika virus (ZIKV), and Dengue virus (DENV) are growing global health threats. Diagnosing these vector-borne diseases is difficult due to overlapping symptoms and cross-reactions.

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    Area of Science:

    • Medical Entomology
    • Infectious Diseases
    • Public Health

    Background:

    • Vector-borne diseases like West Nile virus (WNV), Zika virus (ZIKV), and Dengue virus (DENV) are expanding globally.
    • Globalization, climate change, and urbanization facilitate the spread of these viruses, even into non-endemic regions.
    • These diseases pose a significant public health challenge due to their increasing incidence and potential for explosive epidemics.

    Purpose of the Study:

    • To highlight the diagnostic challenges associated with WNV, ZIKV, and DENV.
    • To underscore the need for improved diagnostic strategies for these overlapping vector-borne diseases.

    Main Methods:

    • Review of current literature on WNV, ZIKV, and DENV epidemiology and diagnostics.
    • Analysis of factors contributing to the spread of vector-borne diseases.
    • Examination of diagnostic difficulties including geographical, clinical, and serological overlaps.

    Main Results:

    • WNV, ZIKV, and DENV share similar clinical presentations and geographical distributions.
    • Serological cross-reactivity complicates accurate differential diagnosis.
    • Urban environments and susceptible populations accelerate disease transmission.

    Conclusions:

    • Accurate and timely diagnosis of WNV, ZIKV, and DENV is critically hindered by overlapping characteristics.
    • Effective public health strategies require addressing the complex interplay of environmental and pathogen factors.
    • Further research into advanced diagnostic methods is essential to combat the rising threat of these vector-borne diseases.