Calcium and phosphorus metabolism in peripartal dogs.

Recommended allowances for calcium and phosphorus are mostly based on factorial calculations partly set at the level determined adequate for giant breeds (Nutrient requirements of dogs and cats. Washington, DC, USA: The National Academies Press. 2006). Information about appropriateness of supply with both minerals during the peripartal phase is limited. From other species is known that bone mineral stores are used in addition to oral intake of calcium and phosphorus in periods of higher needs such as gestation and lactation. The aim of this study was to determine parameters of calcium and phosphorus homeostasis in female dogs receiving the recommended amount of these minerals according to NRC (Nutrient requirements of dogs and cats. Washington, DC, USA: The National Academies Press. 2006) during the peripartal phase. In five Beagles and four Foxhound crossbreds, all primiparous with a litter size of 1-8 puppies, apparent digestibility of calcium and phosphorus as well as serum parameters of mineral metabolism (total and ionised calcium, phosphorus, parathyroid hormone, bone specific alkaline phosphatase, crosslaps) was determined in the period of 12-9 days before and 4-9 days after parturition. The apparent digestibility of calcium was relatively low and did not differ significantly between both peripartal phases, whereas the apparent digestibility of phosphorus increased during lactation. Serum concentrations of calcium (total as well as ionised), phosphorus and parathyroid hormone did not differ between gestation and lactation. The bone resorption marker serum crosslaps increased in lactating dogs but most individual values were within the reference range for adult female dogs at maintenance. On the other hand, the bone formation marker bone specific alkaline phosphatase decreased from prepartal to postpartal phase with values clearly above reference range in both phases. Based on the results especially of the bone markers, which stayed within the reference range during the peripartal phase without indicating predominant bone resorption, we hypothesise that the applied recommended daily allowances defined for peripartal dogs are appropriate.

Malnutrition and refeeding syndrome prevention in head and neck cancer patients: from theory to clinical application.

PURPOSE: The goal of this review is to raise awareness about refeeding syndrome (RFS) and to give a comprehensive presentation of recent guidelines and latest scientific data about nutritional management among head and neck cancer (HNC) patients while focusing on RFS prevention. METHODS: A review of literature for nutritional assessment and RFS management was conducted. Electronic searches of Medline, Cochrane, PubMed and Embase databases for articles published in peer-reviewed journals were conducted from February to September 2017 using the keywords: "nutrition assessment", "head and neck cancer", "refeeding syndrome" and "guidelines". Articles, reviews, book references as well as national and international guidelines in English and French were included. RESULTS: The prevalence of malnutrition is high in HNC patients and a large number of them will need artificial nutritional support or refeeding intervention. RFS is characterized by fluid and electrolyte imbalance associated with clinical manifestations induced by rapid refeeding after a period of malnutrition or starvation. Regarding risk factors for malnutrition and RFS, HNC patients are particularly vulnerable. However, RFS remains unrecognized among head and neck surgeons and medical teams. Practical data are summarized to help organizing nutritional assessment and refeeding interventions. It also summarizes preventive measures to reduce RFS incidence and morbidity in HNC population. CONCLUSION: Nutritional assessment and early refeeding interventions are crucial for HNC patients care. As prevention is the key for RFS management, early identification of patients with high risks is crucial and successful nutritional management requires a multidisciplinary approach.

The Proteomic Composition and Organization of Constitutive Heterochromatin in Mouse Tissues.

Pericentric heterochromatin (PCH) forms spatio-temporarily distinct compartments and affects chromosome organization and stability. Albeit some of its components are known, an elucidation of its proteome and how it differs between tissues in vivo is lacking. Here, we find that PCH compartments are dynamically organized in a tissue-specific manner, possibly reflecting compositional differences. As the mouse brain and liver exhibit very different PCH architecture, we isolated native PCH fractions from these tissues, analyzed their protein compositions using quantitative mass spectrometry, and compared them to identify common and tissue-specific PCH proteins. In addition to heterochromatin-enriched proteins, the PCH proteome includes RNA/transcription and membrane-related proteins, which showed lower abundance than PCH-enriched proteins. Thus, we applied a cut-off of PCH-unspecific candidates based on their abundance and validated PCH-enriched proteins. Amongst the hits, MeCP2 was classified into brain PCH-enriched proteins, while linker histone H1 was not. We found that H1 and MeCP2 compete to bind to PCH and regulate PCH organization in opposite ways. Altogether, our workflow of unbiased PCH isolation, quantitative mass spectrometry, and validation-based analysis allowed the identification of proteins that are common and tissue-specifically enriched at PCH. Further investigation of selected hits revealed their opposing role in heterochromatin higher-order architecture in vivo.

Disparities among Black and Hispanic colorectal cancer patients: Findings from the California Cancer Registry.

BACKGROUND: Colorectal cancer (CRC) is the third most common cancer in California and second among Hispanic/Latinx (H/L) males. Data from the California Cancer Registry were utilized to investigate the differential impact on CRC outcomes from demographic and clinical characteristics among non-Hispanic white (NHW), non-Hispanic Black (NHB), U.S. born (USB), and non-U.S. born (NUSB) H/L patients diagnosed during 1995-2020. METHODS: We identified 248,238 NHW, 28,433 NHB, and 62,747 H/L cases (32,402 NUSB and 30,345 USB). Disparities across groups were evaluated through case frequencies, odds ratios (OR) from logistic regression, and hazard ratios (HR) from Cox regression models. All statistical tests were two-sided. RESULTS: NHB patients showed a higher proportion of colon tumors (75.8%) than NHW (71.5%), whereas both NUSB (65.9%) and USB (66.9%) H/L cases had less (p < 0.001). In multivariate models, NUSB H/L cases were 15% more likely than NHW to have rectal cancer. Compared to NHW, NHB cases had the greatest proportion of Stage IV diagnoses (26.0%) and were more likely to die of CRC (multivariate HR = 1.12; 95% CI = 1.10-1.15). Instead, NUSB H/L patients were less likely to die of CRC (multivariate HR = 0.87; 95% CI = 0.85-0.89) whereas USB H/L did not differ from NHW. CONCLUSIONS: NHB and H/L cases have more adverse characteristics at diagnosis compared to NHW cases, with NHB cases being more likely to die from CRC. However, NUSB H/Ls cases showed better survival than NHW and US born H/L patients. These findings highlight the importance of considering nativity among H/L populations to understand cancer disparities.

Retrospective Pediatric Telepalliative Care Experience.

Background: Rady Children's Hospital (RCH) offers an outpatient pediatric palliative clinic that began offering telepalliative care in 2016. Objectives: This study describes demographics of parents receiving pediatric telepalliative care, patient/family satisfaction with telepalliative care, and patient/family perspectives. Design: Retrospective electronic medical record chart review (2016-2020) of telepalliative patients at RCH (San Diego, USA), including satisfaction surveys. Documented quotes from telepalliative care consultations were analyzed thematically. Results: Fifty-six patients were seen through 181 telepalliative visits. Demographics: Forty-three percent were female and 32% were Hispanic/Latino. Ages ranged from 3 months to 25 years. Average Palliative Performance Scale was 47%. Seventy-nine percent used gastrostomy tubes for nutrition, but only 29% used home ventilation. Eighty-two percent completed a Physician Order for Life-Sustaining Treatment. Goals for 84% of patients were for life prolongation and attempt resuscitation. Visits averaged 86 minutes. Twenty-five surveys were returned: 92% felt very satisfied and 96% said the video visit was the same, better, or much better than an in-person visit. Sixty-four percent said the video visit was more convenient and 68% felt the video visit was safer. Identified themes from telepalliative consultations included advocacy for their child, challenges surrounding care for children with complex medical needs, medical team communication, caregiver support, facing uncertainty, and decision making. Conclusions and Implications: Pediatric patients receiving telepalliative care varied in demographics, functional status, and goals of care. Telepalliative care can provide good quality of care and patient satisfaction. In a telepalliative setting, parents were able to communicate challenging aspects of care including navigating uncertainty, finding support, and decision making.

[A specialist nurse consultation for post-transplant follow-up of patients undergoing allogeneic hematopoietic cell transplantation: Recommendations of the Francophone Society of Marrow Transplantation and Cellular Therapy (SFGM-TC)]. / Mise en place d'une consultation infirmière de suivi post-allogreffe de cellules souches hématopoïétiques : recommandations de la Société francophone de greffe de moelle et de thérapie cellulaire (SFGM-TC).

The number of hematopoietic stem cell transplantation is in constant rise. This increase has put in spotlight the lack of physician availability. Some healthcare centers have already organised a nurse's consultation under the supervision of an expert physician. We conducted a survey among nurses and physicians from the French Society of Bone Marrow Transplantation and Cell Therapy (SFGM-TC) centers who confirmed the need to create a special transplantation-skilled population of nurses. During this ninth annual workshop of the SFGM-TC, we have defined the required conditions for a transplant nurse consultation until day 100 post-transplant with the responsibility of the transplant expert physician. To help the centers in this dynamic, we provided practical tools to support this consultation. The current heath policy is in favor of an increased autonomy of the expert nurse. The implementation of the status of nurse in advanced practice is the first step in this professional development.

[National care logbook for patients undergoing autologous hematopoietic cell transplantation: Guidelines from the Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC)]. / Carnet national destiné aux patients autogreffés : recommandations de la Société francophone de greffe de moelle et de thérapie cellulaire (SFGM-TC).

In an attempt to harmonize clinical practices among French hematopoietic stem cell transplantation centers, the Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC) held its seventh annual workshop series in September 2016 in Lille. This event brought together practitioners from across the country. Our workshop discusses the creation of a patient care logbook for patients undergoing autologous hematopoietic cell transplantation.

[Nutritional management for patients hospitalized during allogeneic stem cell transplantation: Guidelines from the Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC)]. / Prise en charge nutritionnelle des patients hospitalisés pour allogreffe de CSH : recommandations de la Société francophone de greffe de moelle et de thérapie cellulaire (SFGM-TC).

Allogeneic haematopoietic stem-cell transplantation is usually applied with success for patients with diseases involving bone marrow and associated with frequent and severe malnutrition. Denutrition is an independent survival factor and contribute to transplant-related mortality. Due to the heaviness of the treatment, this event is frequent. Before allogeneic transplantation, the nutritional statute should be evaluated. The adult or pediatric patient's evaluation modalities and nutritional needs are detailed in this paper. The administration modalities (enteral or parenteral) with doses are specifically precise. We also explain why the enteral nutritional support may remain the best option comparing to parenteral option.

Amyloid precursor protein and Notch intracellular domains are generated after transport of their precursors to the cell surface.

Alzheimer's disease is characterized by brain deposition of extracellular amyloid beta-peptide (Abeta)-containing plaques. The cellular site of gamma-secretase activity, which releases Abeta and the corresponding amyloid precursor protein intracellular domain (AICD), remains controversial. Proposed cleavage sites range from the endoplasmic reticulum (ER), the Golgi apparatus, and the cell surface to endosomal compartments. We now used C99-green fluorescent protein (GFP), a fluorescent reporter substrate for gamma-secretase activity and monitored AICD production in living cells. C99-GFP is efficiently cleaved by gamma-secretase, and AICD-GFP is released into the cytosol. Inhibiting gamma-secretase results in accumulation of C99-GFP in early endosomes. By blocking selective transport steps along the secretory pathway, we demonstrate that gamma-secretase does not cleave its substrates in the ER, the Golgi/trans-Golgi network, or in secretory vesicles. In contrast, inhibition of endocytosis did not inhibit cleavage of C99-GFP. Similar results were obtained for another gamma-secretase substrate, NotchDeltaE. Our results suggest that intracellular domains are generated by gamma-secretase at the plasma membrane and/or early endosomes.