12 research outputs found
Antiproliferative effect of Tualang honey on oral squamous cell carcinoma and osteosarcoma cell lines
<p>Abstract</p> <p>Background</p> <p>The treatment of oral squamous cell carcinomas (OSCC) and human osteosarcoma (HOS) includes surgery and/or radiotherapy which often lead to reduced quality of life. This study was aimed to study the antiproliferative activity of local honey (Tualang) on OSCC and HOS cell lines.</p> <p>Methods</p> <p>Several concentrations of Tualang honey (1% - 20%) were applied on OSCC and HOS cell lines for 3, 6, 12, 24, 48 and 72 hours. Morphological characteristics were observed under light and fluorescent microscope. Cell viability was assessed using MTT assay and the optical density for absorbance values in each experiment was measured at 570 nm by an ELISA reader. Detection of cellular apoptosis was done using the Annexin V-FITC Apoptosis Detection Kit.</p> <p>Results</p> <p>Morphological appearance showed apoptotic cellular changes like becoming rounded, reduction in cell number, blebbed membrane and apoptotic nuclear changes like nuclear shrinkage, chromatin condensation and fragmented nucleus on OSCC and HOS cell lines. Cell viability assay showed a time and dose-dependent inhibitory effect of honey on both cell lines. The 50% inhibitory concentration (IC<sub><b>50</b></sub>) for OSCC and HOS cell lines was found to be 4% and 3.5% respectively. The maximum inhibition of cell growth of ≥80% was obtained at 15% for both cell lines. Early apoptosis was evident by flow cytometry where percentage of early apoptotic cells increased in dose and time dependent manner.</p> <p>Conclusion</p> <p>Tualang honey showed antiproliferative effect on OSCC and HOS cell lines by inducing early apoptosis.</p
Socializing One Health: an innovative strategy to investigate social and behavioral risks of emerging viral threats
In an effort to strengthen global capacity to prevent, detect, and control infectious diseases in animals and people, the United States Agency for International Development’s (USAID) Emerging Pandemic Threats (EPT) PREDICT project funded development of regional, national, and local One Health capacities for early disease detection, rapid response, disease control, and risk reduction. From the outset, the EPT approach was inclusive of social science research methods designed to understand the contexts and behaviors of communities living and working at human-animal-environment interfaces considered high-risk for virus emergence. Using qualitative and quantitative approaches, PREDICT behavioral research aimed to identify and assess a range of socio-cultural behaviors that could be influential in zoonotic disease emergence, amplification, and transmission. This broad approach to behavioral risk characterization enabled us to identify and characterize human activities that could be linked to the transmission dynamics of new and emerging viruses. This paper provides a discussion of implementation of a social science approach within a zoonotic surveillance framework. We conducted in-depth ethnographic interviews and focus groups to better understand the individual- and community-level knowledge, attitudes, and practices that potentially put participants at risk for zoonotic disease transmission from the animals they live and work with, across 6 interface domains. When we asked highly-exposed individuals (ie. bushmeat hunters, wildlife or guano farmers) about the risk they perceived in their occupational activities, most did not perceive it to be risky, whether because it was normalized by years (or generations) of doing such an activity, or due to lack of information about potential risks. Integrating the social sciences allows investigations of the specific human activities that are hypothesized to drive disease emergence, amplification, and transmission, in order to better substantiate behavioral disease drivers, along with the social dimensions of infection and transmission dynamics. Understanding these dynamics is critical to achieving health security--the protection from threats to health-- which requires investments in both collective and individual health security. Involving behavioral sciences into zoonotic disease surveillance allowed us to push toward fuller community integration and engagement and toward dialogue and implementation of recommendations for disease prevention and improved health security
Comparison of the results obtained for 436 specimens with rapid diagnostic test (RDT) for the detection of measles-specific IgM and with measles -specific IgM indirect and capture enzyme immunoassays (EIAs) or with reverse transcription-polymerase chain reaction (RT-qPCR) for viral detection (indeterminates treated as negatives).
Comparison of the results obtained for 436 specimens with rapid diagnostic test (RDT) for the detection of measles-specific IgM and with measles -specific IgM indirect and capture enzyme immunoassays (EIAs) or with reverse transcription-polymerase chain reaction (RT-qPCR) for viral detection (indeterminates treated as negatives).</p
Survey responses on knowledge, attitudes, and practices about measles rapid diagnostic test (RDT) use at the end of the evaluation period, Malaysia, May-June 2020.
Survey responses on knowledge, attitudes, and practices about measles rapid diagnostic test (RDT) use at the end of the evaluation period, Malaysia, May-June 2020.</p
Mean number of days from measles case notification to public health response (case investigation, contact investigation, active case detection, mop-up vaccination) during pre- rapid diagnostic test (RDT) and RDT implementation periods, among IgM positive cases <sup>b'*'</sup>.
Mean number of days from measles case notification to public health response (case investigation, contact investigation, active case detection, mop-up vaccination) during pre- rapid diagnostic test (RDT) and RDT implementation periods, among IgM positive cases b'*'.</p
Agreement between direct visual readings of measles rapid diagnostic test (RDT) results by clinic staff.
Agreement between direct visual readings of measles rapid diagnostic test (RDT) results by clinic staff.</p
Comparison of the results obtained for 436 specimens with rapid diagnostic test (RDT) for the detection of measles-specific IgM and with measles -specific IgM indirect and capture enzyme immunoassays (EIAs) or with reverse transcription-polymerase chain reaction (RT-qPCR) for viral detection (indeterminates treated as positives).
Comparison of the results obtained for 436 specimens with rapid diagnostic test (RDT) for the detection of measles-specific IgM and with measles -specific IgM indirect and capture enzyme immunoassays (EIAs) or with reverse transcription-polymerase chain reaction (RT-qPCR) for viral detection (indeterminates treated as positives).</p
Standard operating procedure for malaysia measles IgM rapid diagnostic test (RDT) evaluation.
A simplified version of this flow chart including pictures was also provided as a laminated job-aid to use at the point-of-care. NPHL: national public health laboratory; RDT: rapid diagnostic test. (TIF)</p
Sensitivity, specificity, and positive predictive value (PPV) of measles IgM rapid diagnostic test (RDT) results using capillary blood and oral fluid compared with reference testing<sup>b'*'</sup>.
Sensitivity, specificity, and positive predictive value (PPV) of measles IgM rapid diagnostic test (RDT) results using capillary blood and oral fluid compared with reference testingb'*'.</p