703 research outputs found
Navigating the International Legal Terrain for Animal Health and Protection: Specialist Agency or Framework Convention?
This article identifies and analyses key themes in the history of efforts to make international law an effective instrument for protecting animals and their health, as well as touching upon the positive spillovers this can have for human and environmental health. The pursuit of fragmented and inconsistent approaches has made animal protection a secondary consideration, at best, in international relations. Non-governmental organisations (NGOs) and international non-government organisations (INGOs) have valiantly and persistently argued that there is a legal ‘gap’ in the protection of animals at an international level, but they have never had a strong institutional basis from which they could engage collectively and effectively with state parties. We argue that the adoption of a binding international instrument focused on animal protection would fill this gap and we evaluate one particular recent proposal: the draft United Nations Convention for Animal Health and Protection, sponsored by Global Animal Law
Rio +20: What Difference has Two Decades Made to State Practice in the Regulation of Invasive Species
Invasive alien species (IAS) are alien species that threaten ecosystems, habitats or other species. Article 8(h) of the Convention on Biological Diversity (CBD) requires the contracting parties to ‘prevent the introduction of or control or eradicate those alien species that threaten ecosystems, habitats or species’. Members are also required to lodge national reports with the secretariat of the CBD, specifying how they are fulfilling their international obligations with respect to IAS. While the threats to biodiversity posed by IAS have been extensively documented, to date no study has examined States’ perceptions of their own IAS regimes. This paper collects and analyses information available from the CBD national reports to consider what members themselves have identified as their regulatory strengths and weaknesses. Against this backdrop, the paper evaluates the effectiveness of international environmental law in guiding domestic regimes, highlighting that where international law is imprecise/fragmented and/or contradictory, it can hinder the development of successful State practice
Genomic analyses of gray fox lineages suggest ancient divergence and secondary contact in the southern Great Plains
The gray fox (Urocyon cinereoargenteus) lineage diverged from all other extant canids at their most basal node and is restricted to the Americas. Previous mitochondrial analysis from coastal populations identified deeply divergent (up to 1 Mya) eastern and western lineages that predate most intraspecific splits in carnivores. We conducted genotyping by sequencing and mitochondrial analysis on gray foxes sampled across North America to determine geographic concordance between nuclear and mitochondrial contact zones and divergence times. We also estimated the admixture within the contact zone between eastern and western gray foxes based on nuclear DNA. Both datasets confirmed that eastern and western lineages met in the southern Great Plains (i.e. Texas and Oklahoma), where they maintained high differentiation. Admixture was generally low, with the majority of admixed individuals carrying \u3c10% ancestry from the other lineage. Divergence times confirmed a mid-Pleistocene split, similar to the mitochondrial estimates. Taken together, findings suggest gray fox lineages represent an ancient divergence event, far older than most intraspecific divergences in North American carnivores. Low admixture may reflect a relatively recent time since secondary contact (e.g. post-Pleistocene) or, alternatively, ecological or reproductive barriers between lineages. Though further research is needed to disentangle these factors, our genomic investigation suggests species-level divergence exists between eastern and western gray fox lineages
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Comprehensive Approach to Improving Maternal Health and Achieving MDG 5: Report from the Mountains of Lesotho
Background: Although it is now widely recognized that reductions in maternal mortality and improvements in women's health cannot be achieved through simple, vertical strategies, few programs have provided successful models for how to integrate services into a comprehensive program for maternal health. We report our experience in rural Lesotho, where Partners In Health (PIH) in partnership with the Ministry of Health and Social Welfare implemented a program that provides comprehensive care of pregnant women from the community to the clinic level. Methods: Between May and July 2009, PIH trained 100 women, many of whom were former traditional birth attendants, to serve as clinic-affiliated maternal health workers. They received performance-based incentives for accompanying pregnant women during antenatal care (ANC) visits and facility-based delivery. A nurse-midwife provided ANC and delivery care and supervised the maternal health workers. To overcome geographic barriers to delivering at the clinic, women who lived far from the clinic stayed at a maternal lying-in house prior to their expected delivery dates. We analyzed data routinely collected from delivery and ANC registers to compare service utilization before and after implementation of the program. Results: After the establishment of the program, the average number first ANC visits increased from 20 to 31 per month. The clinic recorded 178 deliveries in the first year of the program and 216 in the second year, compared to 46 in the year preceding the program. During the first two years of the program, 49 women with complications were successfully transported to the district hospital, and no maternal deaths occurred among the women served by the program. Conclusions: Our results demonstrate that it is possible to achieve dramatic improvements in the utilization of maternal health services and facility-based delivery by strengthening human resource capacity, implementing active follow-up in the community, and de-incentivizing home births
Age-related dynamics of circulating innate lymphoid cells in an African population
Innate lymphoid cell (ILC) lineages mirror those of CD4+ T helper cell subsets, producing type 1, 2 and 3 cytokines respectively. Studies in adult human populations have shown contributions of non-cytotoxic ILC to immune regulation or pathogenesis in a wide range of diseases and have prompted investigations of potential functional redundancy between ILC and T helper cell compartments in neonates and children. To investigate the potential for ILC to contribute to immune responses across the human lifespan, we examined the numbers and frequencies of peripheral blood ILC subsets in a cohort of Gambians aged between 5 and 73 years of age. ILC2 were the most abundant peripheral blood ILC subset in this Gambian cohort, while ILC1 were the rarest at all ages. Moreover, the frequency of ILC1s (as a proportion of all lymphocytes) was remarkably stable over the life course whereas ILC3 cell frequencies and absolute numbers declined steadily across the life course and ILC2 frequencies and absolute numbers declined from childhood until the age of approx. 30 years of age. Age-related reductions in ILC2 cell numbers appeared to be partially offset by increasing numbers of total and GATA3+ central memory (CD45RA-CCR7+) CD4+ T cells, although there was also a gradual decline in numbers of total and GATA3+ effector memory (CD45RA-CCR7-) CD4+ T cells. Despite reduced overall abundance of ILC2 cells, we observed a coincident increase in the proportion of CD117+ ILC2, indicating potential for age-related adaptation of these cells in childhood and early adulthood. While both CD117+ and CD117- ILC2 cells produced IL-13, these responses occurred predominantly within CD117- cells. Furthermore, comparison of ILC frequencies between aged-matched Gambian and UK young adults (25-29 years) revealed an overall higher proportion of ILC1 and ILC2, but not ILC3 in Gambians. Thus, these data indicate ongoing age-related changes in ILC2 cells throughout life, which retain the capacity to differentiate into potent type 2 cytokine producing cells, consistent with an ongoing role in immune modulation
The Grizzly, March 29, 2012
Airband Benefits Crime Victims Center • Blues Writer Sharon Bridgforth Reads Work • Gilmore Visits Berman Art Museum • UC Recyclemania Holds Green Day Carnival • Alabama Civil Rights Trip was Living History for Students • Rosati Embraces Opportunity at Frederick Living • Greek Week in Progress, Helps to Unite UC Sororities and Fraternities • Opinion: Trayvon Martin Case is a Wake-Up Call • Ursinus Celebrates St. Patrick\u27s Weekend • Player Spotlight: Amanda Laurito, Track and Field • Rugby Continues Building Tradition • Senior Spotlight: Jeff Ocampo, Men\u27s Lacrossehttps://digitalcommons.ursinus.edu/grizzlynews/1856/thumbnail.jp
The Grizzly, April 12, 2012
Fong Inauguration Approaching • UCDC Mixing Up Spring Routine • Housing Lottery Anxiety Addressed • Cuts for a Cause on Campus This Weekend • Ursinus Alumni Return to Work at Alma Mater • UC Students Travel to National Model UN Competition in NYC • Hart Interns at Great Wall Club in Beijing, China • Opinion: Saying No is Man\u27s Responsibility, Too; Delphi was a Positive Experience Despite Criticism • Men\u27s Lacrosse Battles #18 Gettysburg • Seniors Wrapping up Athletic Careershttps://digitalcommons.ursinus.edu/grizzlynews/1858/thumbnail.jp
Exponential growth, high prevalence of SARS-CoV-2, and vaccine effectiveness associated with the Delta variant.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections were rising during early summer 2021 in many countries as a result of the Delta variant. We assessed reverse transcription polymerase chain reaction swab positivity in the Real-time Assessment of Community Transmission–1 (REACT-1) study in England. During June and July 2021, we observed sustained exponential growth with an average doubling time of 25 days, driven by complete replacement of the Alpha variant by Delta and by high prevalence at younger, less-vaccinated ages. Prevalence among unvaccinated people [1.21% (95% credible interval 1.03%, 1.41%)] was three times that among double-vaccinated people [0.40% (95% credible interval 0.34%, 0.48%)]. However, after adjusting for age and other variables, vaccine effectiveness for double-vaccinated people was estimated at between ~50% and ~60% during this period in England. Increased social mixing in the presence of Delta had the potential to generate sustained growth in infections, even at high levels of vaccination.The study was funded by the Department of Health and Social Care in England. Sequencing was provided through funding from the COVID-19 Genomics UK (COG-UK) Consortium. P.E. is Director of the Medical Research Council (MRC) Centre for Environment and Health (MR/L01341X/1, MR/S019669/1). P.E. acknowledges support from Health Data Research UK (HDR UK); the National Institute for Health Research (NIHR) Imperial Biomedical Research Centre; NIHR Health Protection Research Units (HPRUs) in Chemical and Radiation Threats and Hazards, and Environmental Exposures and Health; the British Heart Foundation Centre for Research Excellence at Imperial College London (RE/18/4/34215); and the UK Dementia Research Institute at Imperial (MC_PC_17114). S.R., C.A.D. acknowledge support: MRC Centre for Global Infectious Disease Analysis, NIHR HPRU in Modelling and Health Economics, Wellcome Trust (200861/Z/16/Z, 200187/Z/15/Z), and Centres for Disease Control and Prevention (US, U01CK0005-01-02). G.C. is supported by an NIHR Professorship. H.War. acknowledges support from an NIHR Senior Investigator Award and the Wellcome Trust (205456/Z/16/Z). We thank The Huo Family Foundation for their support of our work on COVID-19. Quadram authors gratefully acknowledge the support of the Biotechnology and Biological Sciences Research Council (BBSRC); their research was funded by the BBSRC Institute Strategic Programme Microbes in the Food Chain BB/R012504/1 and its constituent project BBS/E/F/000PR10352. We thank members of the COVID-19 Genomics Consortium UK (COG-UK) for their contributions to generating the genomic data used in this study. COG-UK is supported by funding from the MRC, part of UK Research & Innovation (UKRI), NIHR and Genome Research Limited, operating as the Wellcome Sanger Institute
Heterozygous SOD2 deletion selectively impairs SERCA function in the soleus of female mice.
The sarco(endo)plasmic reticulum Ca2+ ATPase (SERCA) restores intracellular Ca2+ ([Ca2+ ]i ) to resting levels after muscle contraction, ultimately eliciting relaxation. SERCA pumps are highly susceptible to tyrosine (T)-nitration, impairing their ability to take up Ca2+ resulting in reduced muscle function and increased [Ca2+ ]i and cellular damage. The mitochondrial antioxidant enzyme, superoxide dismutase 2 (SOD2), converts superoxide radicals into less reactive H2 O2 . Heterozygous deletion of SOD2 (Sod2+/- ) in mice increases mitochondrial oxidative stress; however, the consequences of reduced SOD2 expression in skeletal and cardiac muscle, specifically the effect on SERCA pumps, has yet to be investigated. We obtained soleus, extensor digitorum longus (EDL), and left ventricle (LV) muscles from 6 to 7Â month-old wild-type (WT) and Sod2+/- female C57BL/6J mice. Ca2+ -dependent SERCA activity assays were performed to assess SERCA function. Western blotting was conducted to examine the protein content of SERCA, phospholamban, and sarcolipin; and immunoprecipitation experiments were done to assess SERCA2a- and SERCA1a-specific T-nitration. Heterozygous SOD2 deletion did not alter SERCA1a or SERCA2a expression in the soleus or LV but reduced SERCA2a in the EDL compared with WT, though this was not statistically significant. Soleus muscles from Sod2+/- mice showed a significant reduction in SERCA's apparent affinity for Ca2+ when compared to WT, corresponding with significantly elevated SERCA2a T-nitration in the soleus. No effect was seen in the EDL or the LV. This is the first study to investigate the effects of SOD2 deficiency on muscle SERCA function and shows that it selectively impairs SERCA function in the soleus.The Brock Library Open Access Publishing Fun
Suppression of Autophagy Dysregulates the Antioxidant Response and Causes Premature Senescence of Melanocytes
YesAutophagy is the central cellular mechanism for delivering organelles and cytoplasm to lysosomes for
degradation and recycling of their molecular components. To determine the contribution of autophagy to
melanocyte (MC) biology, we inactivated the essential autophagy gene Atg7 specifically in MCs using the Cre-loxP
system. This gene deletion efficiently suppressed a key step in autophagy, lipidation of microtubule-associated
protein 1 light chain 3 beta (LC3), in MCs and induced slight hypopigmentation of the epidermis in mice. The
melanin content of hair was decreased by 10–15% in mice with autophagy-deficient MC as compared with control
animals. When cultured in vitro, MCs from mutant and control mice produced equal amounts of melanin per cell.
However, Atg7-deficient MCs entered into premature growth arrest and accumulated reactive oxygen species
(ROS) damage, ubiquitinated proteins, and the multi-functional adapter protein SQSTM1/p62. Moreover, nuclear
factor erythroid 2–related factor 2 (Nrf2)–dependent expression of NAD(P)H dehydrogenase, quinone 1, and
glutathione S-transferase Mu 1 was increased, indicating a contribution of autophagy to redox homeostasis in
MCs. In summary, the results of our study suggest that Atg7-dependent autophagy is dispensable for
melanogenesis but necessary for achieving the full proliferative capacity of MCs
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