The assessment and management of fatigue following paediatric acquired brain injury: rehabilitation clinicians' perspectives.

Fatigue is common following paediatric acquired brain injury (ABI) and can negatively impact quality of life. Despite this, there is limited understanding of how clinicians currently assess and manage fatigue in rehabilitation. This study explored how Australian rehabilitation clinicians recognize, assess, and manage fatigue following paediatric ABI. Using a qualitative research design, semi-structured interviews were conducted with 11 clinicians who work with children (0-18 years) with ABI in rehabilitation. Interview transcripts were analysed using constructivist grounded theory methods. Two main themes and sub-themes were developed: (1) Reaching a shared understanding: Identifying and understanding fatigue; Unpacking fatigue with children and their families; and (2) Using the shared understanding: Clinicians working collaboratively to manage fatigue; Planning for and supporting children and their family through transitions; Anticipating and problem-solving speedbumps. Participants reflected on the importance of reaching a shared understanding of fatigue within each child's unique context, requiring the collaborative effort of the child, family, school, and interdisciplinary rehabilitation team, to problem-solve and manage fatigue together over time. These findings provide insights into the processes of assessing and managing fatigue from rehabilitation clinicians' perspectives and highlight the importance of a collaborative approach to support the individual needs of the child during their rehabilitation.

Family involvement in rehabilitation programmes for children and adolescents with acquired brain injury: A scoping literature review.

Paediatric acquired brain injury (ABI) can adversely impact families, and it is widely accepted that families should be involved in the rehabilitation of children/adolescents with ABI. However, there is limited guidance about how to best involve families in paediatric ABI rehabilitation. Several programmes involving the families of children/adolescents with ABI have been developed, but there are no published reviews outlining their characteristics. This scoping literature review aimed to synthesize information about these programmes and develop an understanding of how families are involved in them. Four databases were systematically searched to identify sources of evidence that described programmes in paediatric ABI rehabilitation that involve family members. One hundred and eight sources of evidence describing 42 programmes were included. Programmes were categorized as: service coordination (n = 11), psychosocial (n = 17), support groups (n = 4), training/instruction (n = 9), and education (n = 1). Families' involvement in these programmes varied across programme development, delivery, and evaluation stages. The findings of this scoping literature review outline how families can be involved in paediatric ABI rehabilitation. While this review outlines many approaches to supporting families, it also highlights the need for models of family-centred care to better articulate how clinicians and services can involve families in paediatric ABI rehabilitation.

A pilot study for testing feasibility and preliminary influence of early intervention using text messaging for pressure ulcer prevention in individuals with spinal cord injury.

BACKGROUND: This pilot study assessed text messaging as an early intervention for preventing pressure ulcers (PrUs) in individuals with spinal cord injury (SCI) post-hospital discharge. METHOD: Thirty-nine wheelchair-users discharged after acquiring a SCI, underwent randomisation into an intervention group (n = 20) with text messages and a control group (n = 19). All participants received standard post-discharge care and completed a skincare questionnaire before and 6-month after discharge. Primary outcomes included feasibility and acceptability of early intervention using text messaging, alongside performance, concordance, and attitudes toward skincare. Secondary outcomes measured perception and the incidence of PrUs. RESULTS: Baseline demographics were comparable between the intervention and control groups. Eight of 20 participants completed 6-month follow-up questionnaires in the intervention group, six participants completed the 6-month questionnaires in the control group,. Participants expressed high satisfaction with text messages, understanding of content, and increased confidence in preventing PrUs. At 6-month post-discharge, the intervention group showed improved prevention practices, heightened awareness of PrU risks, and increased perceived importance of prevention, which were not observed in the control group. However, there were no significant differences in PrU incidence, possibly due to the small sample size and short follow-up. CONCLUSION: The study demonstrates that using text messaging as an early intervention for PrU prevention in individuals with SCI is feasible and well-received. Preliminary results suggest a positive impact on participants' attitudes and practices, indicating the potential of text messaging to reduce PrU incidence. However, further research with larger samples and extended follow-up is crucial to validate these promising initial findings.

Soil and bark biodiversity forms discrete islands between vineyards that are not affected by distance or management regime.

Within geographic regions, the existing data suggest that physical habitat (bark, soil, etc.) is the strongest factor determining agroecosystem microbial community assemblage, followed by geographic location (site), and then management regime (organic, conventional, etc.). The data also suggest community similarities decay with increasing geographic distance. However, integrated hypotheses for these observations have not been developed. We formalized and tested such hypotheses by sequencing 3.8 million bacterial 16S, fungal ITS2 and non-fungal eukaryotic COI barcodes deriving from 108 samples across two habitats (soil and bark) from six vineyards sites under conventional or conservation management. We found both habitat and site significantly affected community assemblage, with habitat the stronger for bacteria only, but there was no effect of management. There was no evidence for community similarity distance-decay within sites within each habitat. While communities significantly differed between vineyard sites, there was no evidence for between site community similarity distance-decay apart from bark bacterial communities, and no correlations with soil and bark pH apart from soil bacterial communities. Thus, within habitats, vineyard sites represent discrete biodiversity islands, and while bacterial, fungal and non-fungal eukaryotic biodiversity mostly differs between sites, the distance by which they are separated does not define how different they are.

What lies beneath: White matter microstructure in pediatric myalgic encephalomyelitis/chronic fatigue syndrome using diffusion MRI.

Recent studies in adults with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) suggest that changes in brain white matter microstructural organization may correlate with core ME/CFS symptoms, and represent a potential biomarker of disease. However, this has yet to be investigated in the pediatric ME/CFS population. We examined group differences in macrostructural and microstructural white matter properties, and their relationship with clinical measures, between adolescents recently diagnosed with ME/CFS and healthy controls. Forty-eight adolescents (25 ME/CFS, 23 controls, mean age 16 years) underwent brain diffusion MRI, and a robust multi-analytic approach was used to evaluate white and gray matter volume, regional brain volume, cortical thickness, fractional anisotropy, mean/axial/radial diffusivity, neurite dispersion and density, fiber density, and fiber cross section. From a clinical perspective, adolescents with ME/CFS showed greater fatigue and pain, poorer sleep quality, and poorer performance on cognitive measures of processing speed and sustained attention compared with controls. However, no significant group differences in white matter properties were observed, with the exception of greater white matter fiber cross section of the left inferior longitudinal fasciculus in the ME/CFS group compared with controls, which did not survive correction for intracranial volume. Overall, our findings suggest that white matter abnormalities may not be predominant in pediatric ME/CFS in the early stages following diagnosis. The discrepancy between our null findings and white matter abnormalities identified in the adult ME/CFS literature could suggest that older age and/or longer illness duration influence changes in brain structure and brain-behavior relationships that are not yet established in adolescence.

Mixed yeast communities contribute to regionally distinct wine attributes.

There is evidence that vineyard yeast communities are regionally differentiated, but the extent to which this contributes to wine regional distinctiveness is not yet clear. This study represents the first experimental test of the hypothesis that mixed yeast communities-comprising multiple, region-specific, isolates, and species-contribute to regional wine attributes. Yeast isolates were sourced from uninoculated Pinot Noir fermentations from 17 vineyards across Martinborough, Marlborough, and Central Otago in New Zealand. New methodologies for preparing representative, mixed species inoculum from these significantly differentiated regional yeast communities in a controlled, replicable manner were developed and used to inoculate Pinot Noir ferments. A total of 28 yeast-derived aroma compounds were measured in the resulting wines via headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry. Yeast community region of origin had a significant impact on wine aroma, explaining ∼10% of the observed variation, which is in line with previous reports of the effects of region-specific Saccharomyces cerevisiae isolates on Sauvignon Blanc ferments. This study shows that regionally distinct, mixed yeast communities can modulate wine aroma compounds in a regionally distinct manner and are in line with the hypothesis that there is a microbial component to regional distinctiveness, or terroir, for New Zealand Pinot Noir.

Using qualitative methods to establish the clinically meaningful threshold for treatment success in alopecia areata.

PURPOSE: Traditionally, appropriate anchors are used to investigate the amount of change on a clinician-reported outcome assessment that is meaningful to individual patients. However, novel qualitative methods involving input from disease state experts together with patients may better inform the individual improvement threshold for demonstrating the clinical benefit of new treatments. This study aimed to establish a clinically meaningful threshold for treatment success for the clinician-reported Severity of Alopecia Tool (SALT) score for patients with alopecia areata (AA). METHODS: A purposive sample of 10 dermatologists expert in AA and 30 adult and adolescent patients with AA and a history of ≥ 50% scalp hair loss were recruited. Semi-structured interview questions explored the outcome that represented treatment success to clinicians and patients. Findings were analyzed using thematic methods to identify treatment success thresholds. RESULTS: Both informant groups confirmed scalp hair amount as the outcome of priority. Most expert clinicians considered a static threshold of 80% (n = 5) or 75% (n = 3) of the scalp hair as a treatment success. Most patient responses ranged from 70 to 90% (median: 80% of the scalp hair). Subsequently, queried patients confirmed that achieving SALT score ≤ 20 with treatment would be a success, as reflected in the Alopecia Areata Investigator Global Assessment (AA-IGA™). The novel qualitative processes used to inform this meaningful threshold reflects a clinician-then-patient process for: (a) confirmation of the patient outcome of priority; and (b) clinician input on a preliminary treatment success level for independent understanding among patients. CONCLUSION: This qualitative investigation of expert clinicians-then-patients with AA confirmed that achieving an amount of 80% or more scalp hair (SALT score ≤ 20) was an appropriate individual treatment success threshold indicating clinically meaningful improvement for patients with ≥ 50% scalp hair loss. A qualitative investigation of a quantifiable treatment success threshold is possible through a well-designed interview process with expert clinicians and the appropriate patient population.

Engaging children and adolescents with acquired brain injury and their families in goal setting: The family perspective.

This study explored the experiences of goal setting in paediatric rehabilitation from the perspectives of children and adolescents with acquired brain injury (ABI) and their parents in paediatric rehabilitation. Using a qualitative research design, 15 semi-structured interviews were conducted with 13 parents and 8 young people with ABI aged between 9 and 18 years who were engaged in outpatient rehabilitation. Interview transcripts were analysed using constructivist grounded theory methods. Two main themes and several sub-themes emerged: Experiences of goal setting: The role of professionals; The role of the young person; and The role of the parents. Working as a team: Understanding each other and building trust; Communicating, sharing knowledge and different perspectives; and Being flexible. These themes reflect parent's and young people's experience of goal setting during paediatric rehabilitation for ABI and suggest clinicians play an important role in educating young people and their families about goal setting in the outpatient rehabilitation context. Young people and their parents also perceive the focus of outpatient rehabilitation as working collaboratively with clinicians to gain knowledge to manage the consequences of ABI. Our findings emphasize the importance of the therapeutic consumer-clinician relationship and the need to actively engage young people in goal setting.

Rehabilitation models of care for children and youth with traumatic brain and/or spinal cord injuries: A focus on service structure, service organization, and the barriers and facilitators of rehabilitation service provision.

To understand the systems underlying current rehabilitation models of care used with children and youth (0-21years) who sustain traumatic brain and/or spinal cord injuries. This study gathered qualitative data on service structures, service organization, and the barriers and facilitators of service provision in selected medical rehabilitation service(s) (MRS) and community-based rehabilitation service(s) (CBRS). Informants from 11 rehabilitation services were interviewed using a semi-structured interview guide. Interviews were analysed in NVivo using content analysis method. Experiences shared by the service representatives indicated that most services supported children and youth with brain injury, with a limited number also specializing in spinal cord injuries. MRS often delivered care in inpatient or outpatient settings, while CBRS offered home/community-based services. Care planning often started either prior to or shortly after admission from acute care settings, using either multidisciplinary or interdisciplinary teamwork models. Strengths of the services included innovation and provision of family-centred care; while challenges experienced included difficulty translating evidence into practice and poor team communication. Models of care were similar across services, with a focus on providing family-centred care. Several shared challenges were described, and service representatives expressed interest in forming partnerships and collaborations to address these challenges through innovative initiatives.

Engaging children and adolescents with acquired brain injury and their families in goal setting: The clinician perspective.

This paper explored clinicians' experiences of the goal setting process with children and adolescents with acquired brain injuries (ABI) and their families in paediatric neurorehabilitation. Semi-structured interviews were conducted with 13 clinicians, all members of an interdisciplinary paediatric rehabilitation service, who work with children and adolescents with ABI and their families. Interview transcripts and additional data were analysed using constructivist grounded theory methods. Three main themes and sub-themes were developed: (1) Seeing the bigger picture: Goals change over time; Families set bigger picture goals; Need-to-dos: Goals that the child/adolescent needs to achieve; and Want-to-dos: Goals that the child/adolescent wants to achieve; (2) Collaborating as a team: Everyone needs to be on the same page; Hearing the child's/adolescent's voice; and Parents as advocates; and (3) Recognizing and navigating challenges: Child-/adolescent- and family-related challenges and Time as a service-related challenge. Participants perceived the clinician's role during goal setting as that of an active collaborator, enabling children and adolescents with ABI and their families to generate meaningful goals. These findings demonstrate insights into goal setting in paediatric ABI neurorehabilitation from clinicians' perspectives, and highlight the importance of collaboration, flexibility and anticipation of challenges in facilitating children's, adolescents' and families' involvement in this process.

Rehabilitation models of care for children and youth living with traumatic brain and/or spinal cord injuries: A focus on family-centred care, psychosocial wellbeing, and transitions.

To describe current rehabilitation models of care and programmes, in Australia and internationally, related to family-centred care, psychosocial support, and transitions used for children and youth who have sustained major traumatic brain and/or spinal cord injuries. Fourteen services were interviewed, including eight medical rehabilitation services, three community-based rehabilitation services, two insurance services, and one state-wide education service provider. Semi-structured interviews were transcribed and analysed using qualitative content analysis in NVivo. Compared to the number of services supporting children and youth with traumatic brain injury, a very limited number supported those with spinal cord injury. Although valued and often included in the model of care, family-centred care was rarely systematically evaluated by the services. Most services provided psychosocial and transition support to children and youth, and their families in the short-term post-injury, but not in the long-term. Several challenges also hindered the smooth delivery of these support services, including poor communication between service providers. These findings show that services aimed to provide the best possible care to these children and youth, and their families; guided by rehabilitation models of care. However, challenges persist with regards to delivering family-centred care, coordinating return to school, and providing long-term support for psychosocial problems and transition.

Predictors of Listening-Related Fatigue Across the Adult Life Span.

Listening-related fatigue is a potentially serious negative consequence of an aging auditory and cognitive system. However, the impact of age on listening-related fatigue and the factors underpinning any such effect remain unexplored. Using data from a large sample of adults (N = 281), we conducted a conditional process analysis to examine potential mediators and moderators of age-related changes in listening-related fatigue. Mediation analyses revealed opposing effects of age on listening-related fatigue: Older adults with greater perceived hearing impairment tended to report increased listening-related fatigue. However, aging was otherwise associated with decreased listening-related fatigue via reductions in both mood disturbance and sensory-processing sensitivity. Results suggested that the effect of auditory attention ability on listening-related fatigue was moderated by sensory-processing sensitivity; for individuals with high sensory-processing sensitivity, better auditory attention ability was associated with increased fatigue. These findings shed light on the perceptual, cognitive, and psychological factors underlying age-related changes in listening-related fatigue.

A retrospective review of the long term clinical outcomes of patients with neurogenic lower urinary tract dysfunction following transverse myelitis.

AIMS: Transverse myelitis (TM) is an inflammation of the spinal cord which causes neurological deficit in motor, sensory, and autonomic pathways. Persistent neurogenic lower urinary tract dysfunction (NLUTD) is common even where motor and sensory impairment is recovered. Long term follow-up is required to ensure optimal bladder management and protection of the upper tracts. We describe the clinical outcomes for a cohort of patients with TM who have received neurourological follow-up in a specialist center. METHODS: A retrospective review of TM patient records was performed. Current pharmaceutical and surgical management, upper tract status, and patient reported symptoms are reported. Changes in urodynamic parameters and bladder emptying technique between current and baseline were analyzed. RESULTS: Sixty patients with NLUTD following TM were identified. The mean age at onset of NLUTD was 29 years (0-77 years). The mean follow-up was 13 years. 55% of patients were taking antimuscarinic medication, 53% of patients had intradetrusor botulinum toxin injections and 5% had bladder augmentation surgery. Forty-one patients had a baseline and recent urodynamic study which could be compared. Fifty-three of fifty-eight patients with a recent renal ultrasound had normal renal appearance. Four had mild hydronephrosis and one more extensive hydronephrosis. CONCLUSION: TM can have a persistent effect on lower urinary tract function. There is potential for upper tract damage if bladder management is not optimized. We have demonstrated that in a specialist neurourology unit within a tertiary center, one can provide acceptable long term outcomes following international guidelines.

Development and preliminary validation of a tool measuring concordance and belief about performing pressure-relieving activities for pressure ulcer prevention in spinal cord injury.

OBJECTIVE: To develop and examine the reliability, and validity of a questionnaire measuring concordance for performing pressure-relief for pressure ulcer (PrU) prevention in people with Spinal Cord Injury (SCI). METHODS: Phase I included item development, content and face validity testing. In phase II, the questionnaire was evaluated for preliminary acceptability, reliability and validity among 48 wheelchair users with SCI. RESULTS: Thirty-seven items were initially explored. Item and factor analysis resulted in a final 26-item questionnaire with four factors reflecting concordance, perceived benefits, perceived negative consequences, and personal practical barriers to performing pressure-relief activities. The internal consistency reliability for four domains were very good (Cronbach's α = 0.75-.89). Pearson correlation coefficient on a test-retest of the same subjects yielded significant correlations in concordance (r2 = 0.91, p = .005), perceived benefit (r2 = 0.71, p < .04), perceived negative consequences (r2 = 0.98, p < .0001), personal barriers (r2 = 0.93, p= .002). Participants with higher levels of concordance reported a greater amount of pressure-relieving performed. Individuals viewing PrU as a threatening illness were associated with higher scores of concordance and tended to report a greater amount of pressure-relieving performance which provides evidence of criterion related validity. CONCLUSION: The new questionnaire demonstrated good preliminary reliability and validity in people with SCI. Further evaluation is necessary to confirm these findings using larger samples with follow-up data for predictive validity. Such a questionnaire could be used by clinicians to identify high risk of patients and to design individualised education programme for PrU prevention.

The Role of Patients in Alopecia Areata Endpoint Development: Understanding Physical Signs and Symptoms.

Meaningful patient input to understand disease experience and patient expectations for improvement with treatment is essential for the selection and development of outcome measures for alopecia areata (AA) clinical trials. This study explored the physical signs and symptoms of AA through 30 semistructured interviews with adult (n = 25) and adolescent (n = 5) patients experienced with severe or very severe AA. Scalp hair loss was overwhelmingly the most important sign and symptom of AA. Nearly all patients (90%) considered scalp hair loss in their top three most bothersome physical signs and symptoms of AA, with 77% (n = 23) naming scalp hair loss as the most bothersome symptom. Other identified signs and symptoms in the top three most bothersome included eyebrow, eyelash, nose, body, and facial hair loss, as well as eye irritation and nail damage and/or appearance. Eyebrow (16%, n = 4), eyelash (4%, n = 1), nasal (4%, n = 1), and body (4%, n = 1) hair loss were identified by seven adult patients as the most bothersome signs and symptoms of AA. Conceptual saturation confirmed that a comprehensive understanding of this patient population's physical AA-related signs and symptoms was obtained. These findings indicate that the primary objective for new AA treatments for this patient population should be meaningful improvement in scalp hair growth to address the most troubling unmet need.

Small scale fungal community differentiation in a vineyard system.

Microbes influence the quality of agricultural commodities and contribute to their distinctive sensorial attributes. Increasingly studies have demonstrated not only differential geographic patterns in microbial communities and populations, but that these contribute to valuable regionally distinct agricultural product identities, the most well-known example being wine. However, little is understood about microbial geographic patterns at scales of less than 100 km. For wine, single vineyards are the smallest (and most valuable) scale at which wine is asserted to differ; however, it is unknown whether microbes play any role in agricultural produce differentiation at this scale. Here we investigate whether vineyard fungal communities and yeast populations driving the spontaneous fermentation of fruit from these same vineyards are differentiated using metagenomics and population genetics. Significant differentiation of fungal communities was revealed between four Central Otago (New Zealand) Pinot Noir vineyard sites. However, there was no vineyard demarcation between fermenting populations of S. cerevisiae. Overall, this provides evidence that vineyard microbiomes potentially contribute to vineyard specific attributes in wine. Understanding the scale at which microbial communities are differentiated, and how these communities influence food product attributes has direct economic implications for industry and could inform sustainable management practices that maintain and enhance microbial diversity.

A Systematic Critical Appraisal of Evidence-Based Clinical Practice Guidelines for the Rehabilitation of Children With Moderate or Severe Acquired Brain Injury.

OBJECTIVE: The aim of this review was to critically appraise the quality of evidence-based clinical practice guidelines (CPGs) for the rehabilitation of children with moderate or severe acquired brain injury (ABI). DATA SOURCES: A systematic search of MEDLINE, PsycINFO, Embase, CINAHL, and the Cochrane Library was conducted and an extensive website search of prominent professional rehabilitation society websites. STUDY SELECTION: CPGs were eligible for inclusion if they incorporated recommendation statements for inpatient and/or community rehabilitation for children with ABI and they were based on a systematic evidence search. DATA EXTRACTION: Methodological quality of eligible CPGs were appraised by 3 independent reviewers using the AGREE II instrument. Characteristics of eligible CPGs and strength of supporting evidence for included recommendations were extracted. DATA SYNTHESIS: Of the 9 included guidelines, 2 covered all ABIs, 5 focused specifically on traumatic brain injury, and 2 on stroke. Five of the CPGs were classified as high quality and 4 were of average quality. In general, CPGs scored better for scope and purpose, rigor of development, and clarity of presentation. They scored most poorly in applicability, involvement of target users, and procedures for updating the guidelines. Interrater reliability for the AGREE II was generally high across domains. Very few of the 445 recommendations included across the 9 CPGs were evidence based. CONCLUSIONS: Despite variability in quality of the guideline development process, the included CPGs generally provided clear descriptions of their overall objectives, scope and purpose, employed systematic methods for searching, selecting, and appraising research evidence, and produced unambiguous, clearly identifiable recommendations for children with ABI. Overall, existing CPGs focusing on rehabilitation for children with ABI are based on low-quality evidence or expert consensus. Future work should focus on addressing the limitations of most of the current CPGs, particularly related to supporting implementation and integrating stakeholder involvement.

Conditional neuromodulation of neurogenic detrusor overactivity using transrectal stimulation in patients with spinal cord injury: A proof of principle study.

AIMS: A proof of principle study of a novel wearable device to control neurogenic detrusor over-activity in eight male spinal cord injured subjects using conditional neuromodulation. METHODS: Transrectal stimulation was delivered through the device in response to simultaneously recorded external anal sphincter (EAS) contraction as a marker for neurogenic detrusor overactivity (NDO). The effect of conditional neuromodulation on bladder capacity and maximum detrusor pressure was investigated in addition to reliability of dyssynergic sphincter contraction as a marker for NDO. RESULTS: Conditional neuromodulation through the novel device showed a statistically significant increase in bladder capacity and reduction in maximum detrusor pressure in six male subjects with spinal cord injury (SCI). EAS activity was a reliable surrogate for detection of NDO. CONCLUSIONS: It has been shown for the first time that conditional neuromodulation can be delivered and triggered via a single biocompatible device placed in the anal canal. The pudendal nerves lying in Alcock's canal were stimulated through the wall of the anal canal, and the dyssynergic activity of the EAS was used to detect NDO and trigger neuromodulation giving significant increases in bladder capacity and reduction in detrusor pressure in six male subjects with SCI.

Biological Variation of Plasma and Urinary Markers of Acute Kidney Injury in Patients with Chronic Kidney Disease.

BACKGROUND: Identification of acute kidney injury (AKI) is predominantly based on changes in plasma creatinine concentration, an insensitive marker. Alternative biomarkers have been proposed. The reference change value (RCV), the point at which biomarker change can be inferred to have occurred with statistical certainty, provides an objective assessment of change in serial tests results in an individual. METHODS: In 80 patients with chronic kidney disease, weekly measurements of blood and urinary biomarker concentrations were undertaken over 6 weeks. Variability was determined and compared before and after adjustment for urinary creatinine and across subgroups stratified by level of kidney function, proteinuria, and presence or absence of diabetes. RESULTS: RCVs were determined for whole blood, plasma, and urinary neutrophil gelatinase-associated lipocalin (111%, 59%, and 693%, respectively), plasma cystatin C (14%), creatinine (17%), and urinary kidney injury molecule 1 (497%), tissue inhibitor of metalloproteinases 2 (454%), N-acetyl-ß-d-glucosaminidase (361%), interleukin-18 (819%), albumin (430%), and α1-microglobulin (216%). Blood biomarkers exhibited lower variability than urinary biomarkers. Generally, adjusting urinary biomarker concentrations for creatinine reduced (P < 0.05) within-subject biological variability (CVI). For some markers, variation differed (P < 0.05) between subgroups. CONCLUSIONS: These data can form a basis for application of these tests in clinical practice and research studies and are applicable across different levels of kidney function and proteinuria and in the presence or absence of diabetes. Most of the studied biomarkers have relatively high CVI (noise) but also have reported large concentration changes in response to renal insult (signal); thus progressive change should be detectable (high signal-to-noise ratio) when baseline data are available.

Sporulation in soil as an overwinter survival strategy in Saccharomyces cerevisiae.

Due to its commercial value and status as a research model there is an extensive body of knowledge concerning Saccharomyces cerevisiae's cell biology and genetics. Investigations into S. cerevisiae's ecology are comparatively lacking, and are mostly focused on the behaviour of this species in high sugar, fruit-based environments; however, fruit is ephemeral, and presumably, S. cerevisiae has evolved a strategy to survive when this niche is not available. Among other places, S. cerevisiae has been isolated from soil which, in contrast to fruit, is a permanent habitat. We hypothesize that S. cerevisiae employs a life history strategy targeted at self-preservation rather than growth outside of the fruit niche, and resides in forest niches, such as soil, in a dormant and resistant sporulated state, returning to fruit via vectors such as insects. One crucial aspect of this hypothesis is that S. cerevisiae must be able to sporulate in the 'forest' environment. Here, we provide the first evidence for a natural environment (soil) where S. cerevisiae sporulates. While there are further aspects of this hypothesis that require experimental verification, this is the first step towards an inclusive understanding of the more cryptic aspects of S. cerevisiae's ecology.