The Relationship Between Dependency and Sport Participation, Category of Sport, and Gender in College Athletics

This study investigated the relationship between the personality trait of dependency, including the related construct of locus of control, and sport participation of male and female athletes. The student athletes consisted of 68 females and 95 males from both team and individual sports. Data were collected by means of the dependency scores on the Personality Factory Questionnaire (16PF) and Rotter's Locus of Control instrument. The total sample of athletes was not found to be different from non athletes in dependency, but male athletes were less dependent than male non athletes. Female basketball athletes were more dependent than female volleyball athletes. In addition, athletes were significantly more external on locus of control than non athletes. No meaningful relationship was found between dependency and locus of control. The data revealed from this study suggested that the athletic population is essentially no different from the non athlete population on dependency

Band 3 mutations, distal renal tubular acidosis, and Southeast Asian ovalocytosis

Band 3 mutations, distal renal tubular acidosis, and Southeast Asian ovalocytosis. Familial distal renal tubular acidosis (dRTA) and Southeast Asian ovalocytosis (SAO) may coexist in the same patient. Both can originate in mutations of the anion-exchanger 1 gene (AE1), which codes for band 3, the bicarbonate/chloride exchanger in both the red cell membrane and the basolateral membrane of the collecting tubule alpha-intercalated cell. Dominant dRTA is usually due to a mutation of the AE1 gene, which does not alter red cell morphology. SAO is caused by an AE1 mutation that leads to a nine amino acid deletion of red cell band 3, but by itself does not cause dRTA. Recent gene studies have shown that AE1 mutations are responsible for autosomal recessive dRTA in several countries in Southeast Asia; these patients may be homozygous for the mutation or be compound heterozygotes of two different AE1 mutations, one of which is usually the SAO mutation

Differential Proteomic Analysis of Human Erythroblasts Undergoing Apoptosis Induced by Epo-Withdrawal

The availability of Erythropoietin (Epo) is essential for the survival of erythroid progenitors. Here we study the effects of Epo removal on primary human erythroblasts grown from peripheral blood CD34+ cells. The erythroblasts died rapidly from apoptosis, even in the presence of SCF, and within 24 hours of Epo withdrawal 60% of the cells were Annexin V positive. Other classical hallmarks of apoptosis were also observed, including cytochrome c release into the cytosol, loss of mitochondrial membrane potential, Bax translocation to the mitochondria and caspase activation. We adopted a 2D DIGE approach to compare the proteomes of erythroblasts maintained for 12 hours in the presence or absence of Epo. Proteomic comparisons demonstrated significant and reproducible alterations in the abundance of proteins between the two growth conditions, with 18 and 31 proteins exhibiting altered abundance in presence or absence of Epo, respectively. We observed that Epo withdrawal induced the proteolysis of the multi-functional proteins Hsp90 alpha, Hsp90 beta, SET, 14-3-3 beta, 14-3-3 gamma, 14-3-3 epsilon, and RPSA, thereby targeting multiple signaling pathways and cellular processes simultaneously. We also observed that 14 proteins were differentially phosphorylated and confirmed the phosphorylation of the Hsp90 alpha and Hsp90 beta proteolytic fragments in apoptotic cells using Nano LC mass spectrometry. Our analysis of the global changes occurring in the proteome of primary human erythroblasts in response to Epo removal has increased the repertoire of proteins affected by Epo withdrawal and identified proteins whose aberrant regulation may contribute to ineffective erythropoiesis

Ex vivo culture of adult CD34+ stem cells using functional highly porous polymer scaffolds to establish biomimicry of the bone marrow niche

Haematopoiesis, the process of blood production, occurs from a tiny contingent of haematopoietic stem cells (HSC) in highly specialised three-dimensional niches located within the bone marrow. When haematopoiesis is replicated using in vitro two-dimensional culture, HSCs rapidly differentiate, limiting self-renewal. Emulsion-templated highly porous polyHIPE foam scaffolds were chosen to mimic the honeycomb architecture of human bone. The unmodified polyHIPE material supports haematopoietic stem and progenitor cell (HSPC) culture, with successful culture of erythroid progenitors and neutrophils within the scaffolds. Using erythroid culture methodology, the CD34+ population was maintained for 28 days with continual release of erythroid progenitors. These cells are shown to spontaneously repopulate the scaffolds, and the accumulated egress can be expanded and grown at large scale to reticulocytes. We next show that the polyHIPE scaffolds can be successfully functionalised using activated BM(PEG)2 (1,8-bismaleimido-diethyleneglycol) and then a Jagged-1 peptide attached in an attempt to facilitate notch signalling. Although Jagged-1 peptide had no detectable effect, the BM(PEG)2 alone significantly increased cell egress when compared to controls, without depleting the scaffold population. This work highlights polyHIPE as a novel functionalisable material for mimicking the bone marrow, and also that PEG can influence HSPC behaviour within scaffolds

A healing journey with chronic pain – a meta-ethnography synthesising 195 qualitative studies

Objective There is a large body of research exploring what it means for a person to live with chronic pain. However, existing research does not help us understand what it means to recover. We aimed to identify qualitative research that explored the experience of living with chronic pain published since 2012 and to understand the process of recovery. Design A synthesis of qualitative research using meta-ethnography. Methods We used the seven stages of meta-ethnography. We systematically searched for qualitative research, published since 2012, that explored adults’ experiences of living with, and being treated for, chronic pain. We used constant comparison to distill the essence of ideas into themes and developed a conceptual model. Results We screened 1,328 titles and included 195 studies. Our conceptual model indicates that validation and reconnection can empower a person with chronic pain to embark on a journey of healing. To embark on this journey requires commitment, energy, and support. Conclusions The innovation of our study is to conceptualize healing as an ongoing and iterating journey rather than a destination. Health interventions for chronic pain would usefully focus on validating pain through meaningful and acceptable explanations; validating patients by listening to and valuing their stories; encouraging patients to connect with a meaningful sense of self, to be kind to themselves, and to explore new possibilities for the future; and facilitating safe reconnection with the social world. This could make a real difference to people living with chronic pain who are on their own healing journeys