15 research outputs found

    Characterization of anticoagulant heparinoids by immunoprofiling

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    Heparinoids are used in the clinic as anticoagulants. A specific pentasaccharide in heparinoids activates antithrombin III, resulting in inactivation of factor Xa and–when additional saccharides are present–inactivation of factor IIa. Structural and functional analysis of the heterogeneous heparinoids generally requires advanced equipment, is time consuming, and needs (extensive) sample preparation. In this study, a novel and fast method for the characterization of heparinoids is introduced based on reactivity with nine unique anti-heparin antibodies. Eight heparinoids were biochemically analyzed by electrophoresis and their reactivity with domain-specific anti-heparin antibodies was established by ELISA. Each heparinoid displayed a distinct immunoprofile matching its structural characteristics. The immunoprofile could also be linked to biological characteristics, such as the anti-Xa/anti-IIa ratio, which was reflected by reactivity of the heparinoids with antibodies HS4C3 (indicative for 3-O-sulfates) and HS4E4 (indicative for domains allowing anti-factor IIa activity). In addition, the immunoprofile could be indicative for heparinoid-induced side-effects, such as heparin-induced thrombocytopenia, as illustrated by reactivity with antibody NS4F5, which defines a very high sulfated domain. In conclusion, immunoprofiling provides a novel, fast, and simple methodology for the characterization of heparinoids, and allows high-throughput screening of (new) heparinoids for defined structural and biological characteristics

    Improving access to skilled facility-based delivery services: women's beliefs on facilitators and barriers to the utilisation of maternity waiting homes in rural Zambia

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    BACKGROUND: Maternity waiting homes (MWHs) are aimed at improving access to facility-based skilled delivery services in rural areas. This study explored women’s experiences and beliefs concerning utilisation of MWHs in rural Zambia. Insight is needed into women’s experiences and beliefs to provide starting points for the design of public health interventions that focus on promoting access to and utilisation of MWHs and skilled birth attendance services in rural Zambia. METHODS: We conducted 32 in-depth interviews with women of reproductive age (15–45 years) from nine health centre catchment areas. A total of twenty–two in-depth interviews were conducted at a health care facility with a MWH and 10 were conducted at a health care facility without MWHs. Women’s perspectives on MWHs, the decision-making process regarding the use of MWHs, and factors affecting utilisation of MWHs were explored. RESULTS: Most women appreciated the important role MWHs play in improving access to skilled birth attendance and improving maternal health outcomes. However several factors such as women’s lack of decision-making autonomy, prevalent gender inequalities, low socioeconomic status and socio-cultural norms prevent them from utilising these services. Moreover, non availability of funds to buy the requirements for the baby and mother to use during labour at the clinic, concerns about a relative to remain at home and take care of the children and concerns about the poor state and lack of basic social and healthcare needs in the MWHs − such as adequate sleeping space, beddings, water and sanitary services, food and cooking facilities as well as failure by nurses and midwives to visit the mothers staying in the MWHs to ensure their safety prevent women from using MWHs. CONCLUSION: These findings highlight important targets for interventions and suggest a need to provide women with skills and resources to ensure decision-making autonomy and address the prevalent gender and cultural norms that debase their social status. Moreover, there is need to consider provision of basic social and healthcare needs such as adequate sleeping space, beddings, water and sanitary services, food and cooking facilities, and ensuring that nurses and midwives conduct regular visits to the mothers staying in the MWHs
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