Hypomagnesemia: a clinical perspective Pham, Phuong-Chi T; Pham, Phuong-Anh T; Pham, Son V ...
International journal of nephrology and renovascular disease,
01/2014, Letnik:
7, Številka:
default
Journal Article
Recenzirano
Odprti dostop
Although magnesium is involved in a wide spectrum of vital functions in normal human physiology, the significance of hypomagnesemia and necessity for its treatment are under-recognized and ...underappreciated in clinical practice. In the current review, we first present an overview of the clinical significance of hypomagnesemia and normal magnesium metabolism, with a focus on renal magnesium handling. Subsequently, we review the literature for both congenital and acquired hypomagnesemic conditions that affect the various steps in normal magnesium metabolism. Finally, we present an approach to the routine evaluation and suggested management of hypomagnesemia.
Hypomagnesemia in Patients with Type 2 Diabetes Pham, Phuong-Chi T; Pham, Phuong-Mai T; Pham, Son V ...
Clinical journal of the American Society of Nephrology,
03/2007, Letnik:
2, Številka:
2
Journal Article
Recenzirano
Odprti dostop
Hypomagnesemia has been reported to occur at an increased frequency among patients with type 2 diabetes compared with their counterparts without diabetes. Despite numerous reports linking ...hypomagnesemia to chronic diabetic complications, attention to this issue is poor among clinicians. This article reviews the literature on the metabolism of magnesium, incidence of hypomagnesemia in patients with type 2 diabetes, implicated contributing factors, and associated complications. Hypomagnesemia occurs at an incidence of 13.5 to 47.7% among patients with type 2 diabetes. Poor dietary intake, autonomic dysfunction, altered insulin metabolism, glomerular hyperfiltration, osmotic diuresis, recurrent metabolic acidosis, hypophosphatemia, and hypokalemia may be contributory. Hypomagnesemia has been linked to poor glycemic control, coronary artery diseases, hypertension, diabetic retinopathy, nephropathy, neuropathy, and foot ulcerations. The increased incidence of hypomagnesemia among patients with type 2 diabetes presumably is multifactorial. Because current data suggest adverse outcomes in association with hypomagnesemia, it is prudent to monitor magnesium routinely in this patient population and treat the condition whenever possible.
Background
Osmotic demyelination syndrome (ODS) is a complication generally associated with overly rapid correction of hyponatremia. Traditionally, nephrologists have been trained to focus solely on ...limiting the correction rate. However, there is accumulating evidence to suggest that the prevention of ODS is beyond achieving slow correction rates.
Methods
We (1) reviewed the literature for glial intracellular protective alterations during hyperosmolar stress, a state presumed equivalent to the rapid correction of hyponatremia, and (2) analyzed all available hyponatremia-associated ODS cases from PubMed for possible contributing factors including correction rates and concurrent metabolic disturbances involving hypokalemia, hypophosphatemia, hypomagnesemia, and/or hypoglycemia.
Results
In response to acute hyperosmolar stress, glial cells undergo immediate extracellular free water shift, followed by active intracellular Na
+
, K
+
and amino acid uptake, and eventual idiogenic osmoles synthesis. At minimum, protective mechanisms require K
+
, Mg
2+
, phosphate, amino acids, and glucose. There were 158 cases of hyponatremia-associated ODS where both correction rates and other metabolic factors were documented. Compared with the rapid correction group (>0.5 mmol/L/h), the slow correction group (≤0.5 mmol/L/h) had a greater number of cases with concurrent hypokalemia (49.4 vs. 33.3 %,
p
= 0.04), and a greater number of cases with any concurrent metabolic derangements (55.8 vs. 38.3 %,
p
= 0.03).
Conclusion
Glial cell minimizes volume changes and injury in response to hyperosmolar stress via mobilization and/or utilization of various electrolytes and metabolic factors. The prevention of ODS likely requires both minimization of correction rate and optimization of intracellular response during the correction phase when a sufficient supply of various factors is necessary.
Although renal transplantation ameliorates cardiovascular risk factors by restoring renal function, it introduces new cardiovascular risks including impaired glucose tolerance or diabetes mellitus, ...hypertension, and dyslipidemia that are derived, in part, from immunosuppressive medications such as calcineurin inhibitors, corticosteroids, or mammalian target of rapamycin inhibitors. New onset diabetes mellitus after transplantation (NODAT) is a serious and common complication following solid organ transplantation. NODAT has been reported to occur in 2% to 53% of all solid organ transplants. Kidney transplant recipients who develop NODAT have variably been reported to be at increased risk of fatal and nonfatal cardiovascular events and other adverse outcomes including infection, reduced patient survival, graft rejection, and accelerated graft loss compared with those who do not develop diabetes. Identification of high-risk patients and implementation of measures to reduce the development of NODAT may improve long-term patient and graft outcome. The following article presents an overview of the literature on the current diagnostic criteria for NODAT, its incidence after solid organ transplantation, suggested risk factors and potential pathogenic mechanisms. The impact of NODAT on patient and allograft outcomes and suggested guidelines for early identification and management of NODAT will also be discussed.
The prevalence of obesity (body mass index ≥30 kg/m2) at the time of transplantation among kidney transplant recipients in the United States has doubled between 1987 and 2001 and continues to ...increase inexorably. Single‐center and large registry studies in kidney transplant recipients demonstrated that high body mass index (BMI) at transplant is associated with increased risk of wound and surgical site infections, delayed graft function (DGF), acute rejection episodes, and graft loss, among others. Hence, in many centers, obese transplant candidates are denied a transplant based on their body mass index (BMI) alone. The impact of obesity on short‐ and long‐term graft and patient outcomes after kidney transplantation are herein revisited, followed by the authors' proposed approach to evaluate and select obese transplant candidates for a kidney transplant. Suggested interventions to optimize the health of such candidates are also discussed.
Carbapenem-resistant Enterobacteriaceae (CRE) is an increasing problem worldwide, but particularly problematic in low- and middle-income countries (LMIC) due to limitations of resources for ...surveillance of CRE and infection prevention and control (IPC).
A point prevalence survey (PPS) with screening for colonisation with CRE was conducted on 2233 patients admitted to neonatal, paediatric and adult care at 12 Vietnamese hospitals located in northern, central and southern Vietnam during 2017 and 2018. CRE colonisation was determined by culturing of faecal specimens on selective agar for CRE. Risk factors for CRE colonisation were evaluated. A CRE admission and discharge screening sub-study was conducted among one of the most vulnerable patient groups; infants treated at an 80-bed Neonatal ICU from March throughout June 2017 to assess CRE acquisition, hospital-acquired infection (HAI) and treatment outcome.
A total of 1165 (52%) patients were colonised with CRE, most commonly Klebsiella pneumoniae (n = 805), Escherichia coli (n = 682) and Enterobacter spp. (n = 61). Duration of hospital stay, HAI and treatment with a carbapenem were independent risk factors for CRE colonisation. The PPS showed that the prevalence of CRE colonisation increased on average 4.2% per day and mean CRE colonisation rates increased from 13% on the day of admission to 89% at day 15 of hospital stay. At the NICU, CRE colonisation increased from 32% at admission to 87% at discharge, mortality was significantly associated (OR 5·5, P < 0·01) with CRE colonisation and HAI on admission.
These data indicate that there is an epidemic spread of CRE in Vietnamese hospitals with rapid transmission to hospitalised patients.
Hibiscus sabdariffa extracts, a rich source of anthocyanin, were subjected to encapsulation in yeast cells. An encapsulation yield (EY) of 208 μg/100 mg of cells and an encapsulation efficiency (EE) ...of 27%, were reached after optimisation of the ratios (0.5 g wet yeast cells for 5 ml of anthocyanin extracts at 1 g·L−1) and with 10% of ethanol. The storage stability of encapsulated pigments was investigated in water and buffer pH 1.5 at 5 & 37 °C for 10 days and 90 °C for 30 min. The percentage of loss of colour was determined by colourimetry assays. The microparticles made of yeast with or without heat treatment exhibited different protecting effects (P < 0.01). At 37 °C, the percentage of loss of colour in water was of 2.5% for heat-treated and 36.5% for non-treated yeast microparticles, suggesting that yeast enzymes would be responsible for the loss of anthocyanin during storage. These results are confirmed by the percentage of loss of colour which was far lower in conditions of low enzymatic activity: 3.1% at 5 °C for non-heat-treated cells in water. The pH of solvent had also an important effect on the degradation of encapsulated anthocyanin; in buffer at pH 1.5 and 37 °C with the non-heat-treated cells, the degradation decreased strongly to 9.4% compared with 36.5% in water. These results show that yeast cells are a good mean of encapsulation of pigments for a colouring purpose and that they provide anthocyanins a good protection as long as their enzymes are inactivated.
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•Yeast cells were a good material for the encapsulation of anthocyanins.•A process of encapsulation of anthocyanin in yeast has been developed.•Heat-treated yeast microcapsules showed a high protecting effect during storage.•Yeast enzymes caused an unwanted colour loss of anthocyanin during storage.
Pulmonary toxicity has recently been recognized as a potentially serious complication associated with sirolimus therapy. We further detail this condition on the basis of our own cases and those ...reported in the literature.
We report three cases of suspected sirolimus-induced pulmonary toxicity that occurred in three renal transplant recipients and searched PubMed for all previously reported cases.
Including our current cases, 43 patients with sirolimus-induced pulmonary toxicity have now been reported. Clinical data were incomplete in 28 cases. Analysis of available data for 15 patients revealed that the most commonly presenting symptoms were dyspnea on exertion and dry cough followed by fatigue and fever. Chest radiographs and high-resolution computed tomography scans commonly revealed bilateral patchy or diffuse alveolo-interstitial infiltrates. Bronchoalveolar fluid analysis and lung biopsy in selected case reports revealed several distinct histologic features, including lymphocytic alveolitis, lymphocytic interstitial pneumonitis, bronchoalveolar obliterans organizing pneumonia, focal fibrosis, pulmonary alveolar hemorrhage, or a combination thereof. The diagnosis of sirolimus-associated pulmonary toxicity was made after an exhaustive work-up to exclude infectious causes and other pulmonary disease. Sirolimus discontinuation or dose reduction resulted in clinical and radiologic improvement in all 15 patients within 3 weeks.
The temporal relationship between sirolimus exposure and onset of pulmonary symptoms in the absence of infectious causes and other alternative pulmonary disease and the associated clinical and radiologic improvement after its cessation suggests a causal relationship. Because the use of sirolimus in organ transplantation has become more widespread, clinicians must remain vigilant to its potential pulmonary complication.
The link between the nephrotic syndrome (NS) and malignancy was first described in 1922. In solid tumors, the NS is most often due to membranous glomerulonephropathy, whereas in common hematological ...malignancies, minimal-change disease predominates. Focal segmental glomerulosclerosis (FSGS) is among the least frequently reported renal lesion associated with malignancy.
We report a case of the simultaneous diagnoses of FSGS and Hodgkin's lymphoma, and review the literature on various nephrotic glomerulonephropathies associated with common leukemia and lymphoma.
Although nephrotic glomerulonephropathies rarely occur in association with acute leukemia, they have often been described in chronic lymphocytic leukemia (CLL). Membranoproliferative glomerulonephropathy and membranous glomerulonephropathy are the most common lesions observed in CLL. Nephrotic glomerulonephropathies have also been well documented among patients with lymphomas, in particular, Hodgkin's lymphoma. While minimal-change disease is most commonly found in association with Hodgkin's lymphoma, more diverse and complex renal lesions are associated with non-Hodgkin's lymphoma. FSGS remains a rare association with hematological malignancies.
Nephrotic glomerulonephropathies are not only linked to solid-organ tumors, but also to hematological malignancies. A thorough evaluation, including a physical examination for lymphadenopathy and organomegaly, as well as a hematological evaluation, must be performed in all patients presenting with nephrotic glomerulonephropathies.
•A furan-functionalized epoxy was synthesized from bio-based furfurylamine.•A telechelic maleimide-ended oligomer was prepared via thiol‒maleimide michael reaction.•Furan-functionalized epoxy reacted ...with bismaleimide crosslinker to form diels-alder crosslinked epoxy thermoset.•The obtained network exhibited recyclability and shape memory-aided scratch healability.•Scratch healing at 120 °C for 1 h and then 70 °C for 6 h showed tensile strength recovery of ca. 70%.
A straightforward pathway is introduced to synthesize a Diels-Alder (DA)-crosslinked epoxy material with glass transition-induced shape recovery capacity, via combination of an epoxy polymer synthesized from bio-based furfurylamine with a telechelic maleimide-ended oligomer derived from 4,4′-methylenebis(N-phenylmaleimide) and 2,2-(ethylenedioxy)diethanethiol. The use of such a BMI-modified crosslinker overcame the poor solubility and brittleness of materials resulting from the BMI analogue. The formation of the precursors and DA crosslinked network, its recyclability, thermo-reversibility and shape memory-aided scratch healability were visualized qualitatively and studied by FTIR and 1H NMR spectrometry, differential scanning calorimetry, optical microscopy, scanning electron microscopy and tensile measurements. Scratch healing was possible via a two step heating process at 120 °C for 1 h and subsequently at 70 °C for 6 h, reaching a relatively good healing efficiency, evaluated by a tensile strength recovery of approximately 70%.
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