The link between family structure experiences and premarital sexual initiation in sub-Saharan African settings has been investigated using primarily the socialization perspective. This article tests additional hypotheses using the perspectives of change and duration of exposure. The analyses are based on time-dependent retrospective data on family living arrangements from a sample of 1182 individuals aged 12-24 years old, drawn from the Cameroon Family and Health Survey. From the socialization perspective for both females and males: living without both biological parents does not necessarily increase the probability of premarital sexual initiation during adolescence; the timing of family structure experiences is an important factor to consider in life course transitions; and other relatives play a protective role during adolescence, especially among females living in mother-only families. Findings also provide some support for the instability and change hypothesis as well as for the duration of exposure conjecture: a change from other family structure types to a both biological parents structure between age 6 and age 12 (change perspective) and living with the biological mother only at all the time (duration of exposure perspective) are associated with lower risks of premarital sexual initiation during adolescence among females. Our results have implications for preventing risky sexual behaviours during adolescence.
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http://dx.doi.org/10.1016/j.alcr.2013.09.002 | DOI Listing |
Sci Rep
January 2025
Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy.
The Low Density Lipoprotein receptors (LDLRs) gene family includes 15 receptors: very low-density lipoprotein receptor (VLDLR), LDLR, Sorting-related receptor with A-type repeats (SORLA), and 12 LDL receptor-related proteins (LRPs): LRP1, LRP1B, LRP2, LRP3, LRP4, LRP5, LRP6, LRP8, LRP10, LRP11, LRP12, LRP13. Most of these are involved in the transduction of key signals during embryonic development and in the regulation of cholesterol homeostasis. In oviparous animals, the VLDL receptor is also known as VTGR since it facilitates the uptake of vitellogenin in ovary.
View Article and Find Full Text PDFBMJ Glob Health
January 2025
Sickle Cell Programme, Department of Haematology and Blood Transfusion, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania.
Despite progress in healthcare services for individuals living with sickle cell disease (SCD) in Africa, substantial gaps remain in advanced treatments for SCD. To help address this burden, Tanzania has established one of the largest single-centre SCD programmes in the world and developed an advanced therapy programme for SCD focused on patient engagement and advocacy, clinical activities involving exchange blood transfusion (ExBT) and haematopoietic stem cell transplant (HSCT), gene therapy (GT) preparedness, and enabling partnerships. This report describes the programme's genesis, structure and progress achieved.
View Article and Find Full Text PDFComp Biochem Physiol C Toxicol Pharmacol
January 2025
College of Fisheries and Life Science, Dalian Ocean University, 116023 Dalian, China; Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian Ocean University, 116023 Dalian, China.
Aminotransferase is involved in the regulation of amino acid metabolism, which can affect the balance and distribution of amino acids in the organism, help maintain the homeostasis of amino acids in the organism, and play an important role in the environmental adaptation of aquatic animals. In this study, a total of 28 aminotransferase genes were identified in the genome of R. philippinarum.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
February 2025
Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg 1790 AB, The Netherlands.
Heterocytes, specialized cells for nitrogen fixation in cyanobacteria, are surrounded by heterocyte glycolipids (HGs), which contribute to protection of the nitrogenase enzyme from oxygen. Diverse HGs preserve in the sediment and have been widely used as evidence of past nitrogen fixation, and structural variation has been suggested to preserve taxonomic information and reflect paleoenvironmental conditions. Here, by comprehensive HG identification and screening of HG biosynthetic gene clusters throughout cyanobacteria, we reconstruct the convergent evolutionary history of HG structure, in which different clades produce the same HGs.
View Article and Find Full Text PDFMol Biol Rep
January 2025
School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, People's Republic of China.
Background: Paeonia lactiflora Pall., a member of Paeoniaceae family, is a medicinal herb widely used in traditional Chinese medicine. Chloroplasts are multifunctional organelles containing distinct genetic material.
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