Anemia and the role of erythropoietin in diabetes

Sensing Biomechanical Alterations in Red Blood Cells of Type 1 Diabetes Patients: Potential Markers for Microvascular Complications

In physiological conditions, red blood cells (RBCs) demonstrate remarkable deformability, allowing them to undergo considerable deformation when passing through the microcirculation. However, this deformability is compromised in Type 1 diabetes mellitus (T1DM) and related pathological conditions. This study aims to investigate the biomechanical properties of RBCs in T1DM patients, focusing on identifying significant mechanical alterations associated with microvascular complications (MCs). We conducted a case-control study involving 38 T1DM subjects recruited from the Diabetes Care Unit at Fondazione Policlinico Gemelli Hospital, comprising 22 without MCs (control group) and 16 with MCs (pathological group). Atomic Force Microscopy was employed to assess RBC biomechanical properties in a liquid environment. We observed significant RBC stiffening in individuals with MCs, particularly during large indentations that mimic microcirculatory deformations. Univariate analysis unveiled significant differences in RBC stiffness (median difference 0.0006 N/m, p = 0.012) and RBC counts (median difference -0.39 × 1012/L, p = 0.009) between the MC and control groups. Bivariate logistic regression further demonstrated that combining these parameters could effectively discriminate between MC and non-MC conditions, achieving an AUC of 0.82 (95% CI: 0.67-0.97). These findings reveal the potential of RBC biomechanical properties as diagnostic and monitoring tools in diabetes research. Exploring RBC mechanical alterations may lead to the development of novel biomarkers, which, in combination with clinical markers, could facilitate the early diagnosis of diabetes-related complications.

Association between diabetes mellitus and total hip arthroplasty outcomes: an observational study using the US National Inpatient Sample

OBJECTIVES

To investigate the association of diabetes with postoperative outcomes in patients undergoing primary total hip arthroplasty (THA).

DESIGN

Retrospective cohort study using data from the US National Inpatient Sample (NIS).

SETTING

Study cohort was hospitalisations for primary THA in the USA, identified from the 2016-2020 NIS.

PARTICIPANTS

We identified 2 467 215 adults in the 2016-2020 NIS who underwent primary THA using International Classification of Diseases, 10th Revision codes. Primary THA hospitlizations were analysed as the overall group and also stratified by the underlying primary diagnosis for THA.

OUTCOME MEASURES

Outcome measures of interest were the length of hospital stay>the median, total hospital charges>the median, inpatient mortality, non-routine discharge, need for blood transfusion, prosthetic fracture, prosthetic dislocation and postprocedural infection, including periprosthetic joint infection, deep surgical site infection and postprocedural sepsis.

RESULTS

Among 2 467 215 patients who underwent primary THA, the mean age was 68.7 years, 58.3% were female, 85.7% were white, 61.7% had Medicare payer and 20.4% had a Deyo-Charlson index (adjusted to exclude diabetes mellitus) of 2 or higher. 416 850 (17%) patients had diabetes. In multivariable-adjusted logistic regression in the overall cohort, diabetes was associated with higher odds of a longer hospital stay (adjusted OR (aOR) 1.38; 95% CI 1.35 to 1.41), higher total charges (aOR 1.11; 95% CI 1.09 to 1.13), non-routine discharge (aOR 1.18; 95% CI 1.15 to 1.20), the need for blood transfusion (aOR 1.19; 95% CI 1.15 to 1.23), postprocedural infection (aOR 1.62; 95% CI 1.10 to 2.40) and periprosthetic joint infection (aOR 1.91; 95% CI 1.12 to 3.24). We noted a lack of some associations in the avascular necrosis and inflammatory arthritis cohorts (p>0.05).

CONCLUSION

Diabetes was associated with increased healthcare utilisation, blood transfusion and postprocedural infection risk following primary THA. Optimisation of diabetes with preoperative medical management and/or institution of specific postoperative pathways may improve these outcomes. Larger studies are needed in avascular necrosis and inflammatory arthritis cohorts undergoing primary THA.

Risk factors for postoperative transfusion in diabetic patients following total shoulder arthroplasty

Background

Diabetes has been reported as a risk factor for postoperative transfusion following total shoulder arthroplasty (TSA). However, the risk factors specific to diabetic patients that increase their likelihood of postoperative blood transfusion remains understudied. The purpose of the study was to investigate the risk factors that are associated with 30-day postoperative transfusion among diabetic patients who undergo TSA.

Methods

The American College of Surgeons National Surgical Quality Improvement Program database was queried for all patients who underwent TSA between 2015 and 2020. Both patients with and without diabetes were divided into cohorts based on 30-day postoperative transfusion requirement. Bivariate logistic regression was used to compare patient demographics and comorbidities. Multivariate logistic regression, adjusted for all significant patient demographics and comorbidities, was used to identify the characteristics independently associated with postoperative transfusion.

Results

A total of 4376 diabetic patients remained after exclusion criteria, with 4264 (97.4%) patients who did not require postoperative transfusion and 112 (2.6%) patients who did require postoperative transfusion. On multivariate analysis, female gender (odds ratio [OR] 2.43, 95% confidence interval [CI] 1.52-3.89; P < .001), American Society of Anesthesiologists ≥3 (OR 2.46, 95% CI 1.10-5.48; P = .028), bleeding disorder (OR 2.94, 95% CI 1.50-5.76; P = .002), transfusion prior to surgery (OR 12.19, 95% CI 4.25-35.00; P < .001), preoperative anemia (OR 8.76, 95% CI 5.47-14.03; P < .001), and operative duration ≥129 minutes (OR 4.05, 95% CI 2.58-6.36; P < .001) were found to be independent risk factors for postoperative transfusion among diabetic patients. Our nondiabetic cohort included 19,289 patients, with 341 (1.8%) requiring postoperative transfusion. On Multivariate analysis, we found similar risk factors for transfusion to our diabetic population, as well as age ≥75 (OR 1.80, 95% CI 1.37-2.35; P < .001) and dependent functional status (OR 2.16, 95% CI 1.40-3.32; P < .001) to be independent risk factors for postoperative transfusion among nondiabetic patients.

Conclusion

Female gender, American Society of Anesthesiologists ≥3, bleeding disorder, transfusion prior to surgery, preoperative anemia, and operative duration ≥129 minutes were independently associated with postoperative transfusion following TSA in diabetic patients. These findings encourage physicians to carefully assess patients with diabetes preoperatively to minimize adverse outcomes.

Prevalence of anemia in diabetes mellitus in South Asia: A systematic review and meta-analysis

OBJECTIVE

Anemia and Diabetes Mellitus (DM) are amongst major clinical and public health challenges in South Asia that influence the progression of chronic health problems in this population. Despite a growing body of research on these problems, there is a lack synthesized evidence on the burden of anemia among people with DM in this region. This meta-analytic review was conducted to estimate the prevalence of anemia among people with DM in South Asia.

METHODS

A systematic search of the literature was conducted in five primary databases and additional sources up to July 29, 2022, that reported the prevalence of anemia among DM patients in any of the eight South Asian countries. Observational studies that met pre-determined eligibility criteria according to the protocol registered in PROSPERO (CRD42022348433) were included in this meta-analysis. Random effect models were used to estimate pooled prevalence.

RESULTS

Of the 40 eligible studies, 38 underwent meta-analysis representing 14,194 participants with DM. The pooled prevalence of anemia was 45% (95% CI: 37.0-54.0, I2 = 99.28%, p = 0.00) among diabetic people in South Asia. In sub-group analysis, the pooled prevalence of anemia was higher in females (48%, 95% CI: 37.0-60.0, I2 = 98.86%, p = 0.00) compared to males (39%, 95% CI: 29.0-48.0, I2 = 98.18%, p = 0.00). Diabetic patients with older age (≥ 50 years) reported higher pooled estimates of anemia (48%, 95% CI: 38.0-58.0, I2 = 99.07%) than younger age group (< 50 years) (34%, 95% CI: 21.0-47.0, I2 = 98.83%). In addition, we found variation in pooled prevalence estimates of anemia considering the type of DM, such as type 1 reported 2% (95% CI: 0.00-4.00), type-2 reported 48% (95% CI: 40.0-56.0, I2 = 98.94%), and Gestational diabetes mellitus (GDM) reported 6% (95% CI: 3.00-12.0).

CONCLUSION

High pooled estimates of anemia among diabetic patients in South Asia, including publication bias, warrants further clinical and public health research following standard research methods to understand the more context-specific epidemiological insights and evidence.

Rubrometabolic Syndrome

Metabolic syndrome (MS), a conglomeration of several conditions including obesity, type 2 diabetes mellitus (T2DM), insulin resistance, elevated blood pressure, and dyslipidemia is reaching epidemic proportions. Anemia is caused by iron deficiency or dysregulation of iron homeostasis, leading to tissue hypoxia. Coexistence of anemia and MS or its components has been reported in the literature. The term "rubrometabolic syndrome" acts as a unifying entity linking the importance of blood in health and anemia in MS; it justifies two principles - redness of blood and low-grade inflammation. Chronic low-grade inflammation in MS affects iron metabolism leading to anemia. Tissue hypoxia that results from the anemic condition seems to be a major causative factor for the exacerbation of several microvascular and macrovascular components of T2DM, which include diabetic neuropathy, nephropathy, retinopathy, and cardiovascular complications. In obesity, anemia leads to malabsorption of micronutrients and can complicate the management of the condition by bariatric surgery. Anemia interferes with the diagnosis and management of T2DM, obesity, dyslipidemia, or hypertension due to its effect on pathological tests as well as medications. Since anemia in MS is multifaceted, the management of anemia is challenging as overcorrection of anemia with erythropoietin-stimulating agents can cause detrimental effects. These limitations necessitate availability of an effective and safe therapy that can maintain and elevate the hemoglobin levels along with maintaining the physiological balance of other systems. This review discusses the physiological links between anemia and MS along with diagnosis and management strategies in patients with coexistence of anemia and MS.

Anemia is a risk factor for rapid eGFR decline in type 2 diabetes

OBJECTIVE

To investigate the association between anemia and progression of diabetic kidney disease (DKD) in type 2 diabetes.

METHODS

This was a retrospective study. A total of 2570 in-patients with type 2 diabetes hospitalized in Jinan branch of Huashan hospital from January 2013 to October 2017 were included, among whom 526 patients were hospitalized ≥ 2 times with a median follow-up period of 2.75 years. Annual rate of eGFR decline was calculated in patients with multiple admissions. A rate of eGFR decline exceeding -5 ml/min per 1.73 m² per year was defined as rapid eGFR decline. The prevalence of DKD and clinical characteristics were compared between anemia and non-anemia patients. Correlation analysis was conducted between anemia and clinical parameters. Comparison of clinical features were carried out between rapid eGFR decline and slow eGFR decline groups. The risk factors for rapid DKD progression were analyzed using logistic regression analysis.

RESULTS

The prevalence of anemia was 28.2% among the 2570 diabetic patients, while in patients with DKD, the incidence of anemia was 37.8%. Patients with anemia had greater prevalence of DKD, higher levels of urinary albumin-to-creatinine ratio (UACR), serum creatinine, BUN, urine α1-MG, urine β2-MG, urine NAG/Cr, hsCRP, Cystatin C, homocysteine and lower eGFR, as compared to the patients without anemia. Anemia was correlated with age, UACR, eGFR, urinary NAG/Cr, hsCRP and diabetic retinopathy (DR). Logistic regression analysis of 526 patients with type 2 diabetes during the follow-up period showed that anemia was an independent risk factor for rapid eGFR decline.

CONCLUSION

Anemia is associated with worse renal function and is an independent risk factor for rapid eGFR decline in type 2 diabetes.

Risk stratification algorithm for clinical outcomes in anemic patients undergoing percutaneous coronary intervention

BACKGROUND

To explore the crosstalk between baseline or visit hemoglobin and major adverse cardiovascular and cerebral events (MACCE) in percutaneous coronary intervention (PCI) patients and to construct risk stratification models to predict MACCE amongst these patients.

MATERIALS AND METHODS

We conducted a retrospective cohort in patients undergoing PCI procedures at Beijing Friendship Hospital between January 2013 and December 2020. Multivariate Cox proportional hazards models were employed for data analyses. The composite MACCE was the primary endpoint and we used machine learning algorithms to evaluate risk factors associated with MACCE. Model performance was measured using Brier scores and receiver-operating characteristic curves. The association between risk factors and MACCE probability was examined using partial dependency plots.

RESULTS

8,298 PCI-treated patients were enrolled in the study. 1,919 of these patients had anemia. During a four-year median follow-up period, 1,636 patients (19.71%) had MACCE. The visit hemoglobin and hemoglobin change was associated with higher risk of MACCE respectively (visit hemoglobin: hazard ratio [HR]: 0.98; 95% confidence interval [CI]: 0.98-0.99; p < 0.001; hemoglobin change: HR: 0.99; 95%CI: 0.98-0.99; p < 0.001). Gradient Boosting (GB) was the BPM, with a mean C-statistic value of 0.78 (95% CI: 0.76-0.80) for predicting MACCE (Brier score: 0.26). The best indicator for MACCE was a low estimated glomerular filtration rate [eGFR] (71 mL/min/1.73m2) at admission, followed by a high serum HbA1c (6.6%) level. A simple risk tree successfully classified patients (17-40.5%) with increased risks of MACCE. The high- vs. low-risk HR for MACCE was 2.04 (95% CI: 1.48-2.82).

CONCLUSIONS

Visit hemoglobin and long-term hemoglobin changes were more predictive of MACCE risk than baseline hemoglobin levels. Our findings indicated that increasing hemoglobin levels might improve the long-term prognosis of anemia patients. We established a new risk stratification model for MACCE, which may more efficiently prioritize targeted screening for at-risk anemic patients undergoing PCI.

Hematological abnormalities among adults with type 1 diabetes mellitus at the University of Gondar Comprehensive Specialized Hospital

Objective:

Changes in the blood cell function, metabolism, and the coagulation system were associated with diabetes mellitus. This study aimed to determine the magnitude and associated factors of hematological abnormalities in adults with type 1 diabetes mellitus.

Methods:

A total of 204 medical charts of adults with type 1 diabetes mellitus who registered for follow-up at the University of Gondar Comprehensive Specialized Hospital were reviewed from June to August 2021. Data were collected using a structured data extraction checklist. To identify factors associated with hematological abnormalities, both bivariate and multivariate logistic regression analyses were done. Statistical significance was defined as a p-value of <0.05.

Results:

The overall magnitude of leukocytosis and anemia in adults with type 1 diabetes mellitus was 76.0% (95% confidence interval: 70.07–81.89) and 30.90% (95% confidence interval: 24.49–37.28), respectively. Neutrophilia and lymphocytosis were the common white blood cell abnormalities detected in 53.43% (95% confidence interval: 46.53–60.33) and 43.63% (95% confidence interval: 36.76–50.49) of the patients, respectively. Besides, thrombocytosis and thrombocytopenia were observed in 5.4% (95% confidence interval: 2.27–8.52) and 10.3% (95% confidence interval: 6.09–14.5) of the patients, respectively. Only being male (adjusted odds ratio = 2.28 (95% confidence interval: 1.46–5.29)) and duration of diabetes mellitus (⩾3 years) (adjusted odds ratio = 8.41 (95% confidence interval: 2.49–28.29)) were significantly associated with anemia and leukocytosis, respectively.

Conclusion:

Hematological abnormalities, particularly anemia and leukocytosis, are common in patients with type 1 diabetes mellitus. Therefore, preventive and control strategies for hematological abnormalities are essential in patients with type 1 diabetes mellitus particularly for male and patients with a long duration on diabetes mellitus to reduce the burden and related complications.

Choroidal thickness in children with type 1 diabetes depending on the pubertal status and metabolic parameters analyzed by optical coherence tomography

To assess choroidal thickness (CT) in children with type 1diabetes (T1D) regarding their pubertal status and seek for factors influencing this parameter, using optical coherence tomography.

MATERIAL AND METHODS

333 eyes out of 167 children with T1D without symptoms of diabetic retinopathy (mean age 12.81 ± 3.63 years, diabetes duration 4.59 ± 3.71 years) were enrolled. CT in all quadrants was evaluated. The studied population was divided into three groups: prepubertal, pubertal and postpubertal. The multivariate regression model was carried out using all metabolic parameter and then it was built using only the significant ones.

RESULTS

Significant differences in CT between males and females, except nasal and superior quadrants were observed. We revealed significant differences in CT between the three independent groups (Chi-square 18.6, p < 0.0001). In the statistically significant multiple regression model (R = 0.9, R² = 0.82, p < 0.0000), the serum level of free thyroxine, triiodothyronine, total hemoglobin, uric acid, low- and high-density cholesterol, daily insulin dose per kilogram, weight and level of vitamin D were significant.

CONCLUSION

In our studied group CT increases during puberty. Metabolic parameters such as cholesterol, uric acid, thyroid hormones, and hemoglobin concentration even within the normal range, significantly influence the CT, and these factors likely affect other blood vessels in the body.

Luteolin alleviates inorganic mercury-induced kidney injury via activation of the AMPK/mTOR autophagy pathway

Inorganic mercury is a ubiquitous toxic pollutant in the environment. Exposure to inorganic mercury can cause various poisonous effects, including kidney injury. However, no safe and effective treatment for kidney injury caused by inorganic mercury has been found and used. Luteolin (Lut) possesses various beneficial bioactivities. Here, our research aims to investigate the protective effect of Lut on renal injury induced by mercury chloride (HgCl₂) and identify the underlying autophagy regulation mechanism. Twenty-eight 6-8 weeks old Wistar rats were randomly assigned to four groups: control, HgCl₂, HgCl₂ + Lut, and Lut. We performed the determination of oxidative stress and renal function indicators, histopathological analysis, the terminal deoxynucleotidyl transferase-mediated deoxyuracil nucleoside triphosphate nick-end labeling assay to detect apoptosis, western blot detection of autophagy-related protein levels, and atomic absorption method to detect mercury content. Our results showed that Lut ameliorated oxidative stress, apoptosis and restored the autophagy and renal function caused by HgCl₂ in rats. Concretely, the level of nuclear factor E2-related factor, renal adenosine monophosphate-activated protein kinase (AMPK) expression, and autophagy regulation-related proteins levels were down-regulated, and the mammalian target of rapamycin (mTOR) expression was up-regulated by HgCl₂ treatment. However, Lut treatment reversed the above changes. Notably, Lut reduced the accumulation of HgCl₂ in the kidneys and promoted the excretion of HgCl₂ through urine. Collectively, our results demonstrate that Lut can attenuate inorganic mercury-induced renal injury via activating the AMPK/mTOR autophagy pathway. Therefore, Lut may be a potential biological medicine to protect against renal damage induced by HgCl₂.

A relationship between unrecognized anaemia and the development of type 2 diabetes mellitus in patient with cardiovascular risks

Studies on anaemia in diabetic patients are well known. However, the data regarding association of anaemia on the development of diabetes mellitus (DM) are very limited. We aimed to evaluate the association of anaemia on the development of DM and major clinical outcomes in a series of the Korean population during 5-year clinical follow-up. The patients were retrospectively enrolled using the electronic database of Korea University Guro Hospital from January 2004 to February 2013. A total of 17 515 subjects without a history of DM were analysed. The World Health Organization definition of anaemia was used. Patients were divided into the anaemia group (n = 2907 patients) and the non-anaemia group (n = 14 608 patients). The primary endpoint was the development of DM. To adjust baseline potential confounders, a propensity score matching (PSM) analysis was performed. After PSM analysis, two matched groups (2731 pairs) were generated and their baselines characteristics were balanced. During 5-year follow-up, the anaemia group had a higher incidence of type 2 DM (10.7% vs 7.7%; hazard ratio [HR], 1.356; 95% confidence interval [CI], 1.021-1.802; P = .035), and total death (2.6% vs 1.2%; HR, 2.449; 95% CI, 1.337-4.486; P = .004) compared to the non-anaemia group. In the present study, anaemia was associated with higher rate of the development of DM and mortality during 5-year clinical follow-up. A randomized trial is needed to determine whether this results can be reproducible or not for the final conclusion.

The Relationship between Erythrocytes and Diabetes Mellitus

High blood glucose level (hyperglycemia) is a leading indicator of diabetes mellitus (DM). Erythrocytes are the most abundant cells in the circulation and the first to perceive changes in plasma composition. Long-lasting hyperglycemia affects the structure and function of erythrocytes. The detection of erythrocyte-related indicators can provide a valuable reference for the prevention, diagnosis, and treatment of DM and its complications. This paper reviews the normal structure and function of erythrocytes, the changes in erythrocytes in patients with diabetes, and the role of erythrocytes in the development of diabetic complications to provide more indicators for the early prevention of DM complications and to monitor the therapeutic effect of DM.

Anemia among Adult Diabetic Patients Attending a General Hospital in Eastern Ethiopia: a Cross-sectional Study

BACKGROUND

Although anemia is a common condition among patients with diabetes mellitus, there is little evidence on anemia among this segment of population in Ethiopia at large and in the study setting in particular. Thus, this study aimed at assessing the magnitude of anemia and its associated factors among adult diabetic patients attending a general hospital in Eastern Ethiopia.

METHODS

A health facility-based cross-sectional study was conducted among 325 randomly selected adult diabetes mellitus patients attending a follow-up clinic at Gelemso General Hospital, Eastern Ethiopia. Data were collected through an interview using a pre-tested and structured questionnaire followed by physical and laboratory measurements. Data were then entered into EpiData Version.3.1 and analyzed by using STATA version 16.0. Binary logistic regression models were fitted to identify factors associated with anemia. All statistical tests were declared significant at p-value < 0.05.

RESULTS

The magnitude of anemia among adult diabetic patients was 30.2% (95% confidence interval (CI): 25.4%-35.4%). Anemia was higher in males (36%) than females (20.5%). Male gender (Adjusted Odds Ratio (AOR) = 2.1, 95% CI: 1.2, 3.8), DM duration of ≥5 years (AOR= 1.9, 95% CI: 1.0, 3.7), presence of comorbidity (AOR= 1.9, 95% CI: 1.0, 3.7), and having diabetic complications (AOR= 2.3, 95% CI: 1.3, 4.2) were significantly associated with anemia.

CONCLUSION

Anemia was a moderate public health problem among adult DM patients in the study setting. Being male in gender, duration of DM, presence of DM complications, and DM co-morbidities were factors associated with anemia. Therefore, routine screening and appropriate management of anemia targeting males, DM patients with longer duration of DM, and those with complications and co-morbidities should be devised to improve patients' quality of life. Early diagnosis and regular monitoring of DM could also help to minimize further complications.

Effect of <i>Ocimum gratissimum</i> Leaf-extract on Hematological Indices and Lipid Profile of Streptozotocin-induced Diabetic Wistar Rats

BACKGROUND AND OBJECTIVE

Ocimum gratissimum (OG) has been used in ethnopharmacology for the treatment of diabetes. The aim of the study was to evaluate the effect of Ocimum gratissimum leaf-extract on hematological indices and lipid profile of Streptozotocin-induced diabetic Wistar rats.

MATERIALS AND METHODS

Twenty-four rats weighing 100-160 g were randomly assigned to four treatment groups, the normal and diabetic controls, received a placebo treatment, while groups three and four were administered glibenclamide and OG leaf-extract (400 mg kg-1 b.wt.), respectively. The extracts were administered twice daily for 28 days. The rats were sacrificed and whole blood was collected for hematological and serum lipid profile assays. Data were analyzed using one-way ANOVA.

RESULTS

Diabetes induction resulted in decreases (p<0.05) in Red Blood Cell (RBC), Hemoglobin (Hb), White Blood Cell (WBC) and increases in Mean Corpuscular Hemoglobin and Blood platelets compared to the normal control. Treatment with O. gratissimum extract reversed RBC (7.74±0.39 μL), WBC (16.57±3.02) and Platelet (804.33±194.02) levels, but not Hb, towards normal levels (7.99±0.04, 11.27±0.69, 839.67±10.17 respectively). Diabetes induction also resulted in increases (p<0.05) in Triglyceride (TG) and Very-Low-Density Lipoprotein (VLDL), decreases (p<0.05) in High-Density Lipoprotein (HDL) and Low-Density Lipoprotein (LDL) compared to normal control with no significant change in Total Cholesterol (TC). After administration with Ocimum gratissimum TC, LDL and VLDL and HDL levels were significantly (p<0.05) reduced relative to the diabetic control. TG was however increased relative to the diabetic control.

CONCLUSION

Overall, data suggests the plant holds great potential in amelioration of diabetes-induced dyslipidemia and hematological disorders.

High-altitude adaptations mitigate risk for hypertension and diabetes-associated anemia

BACKGROUND

Human populations native to high altitude exhibit numerous genetic adaptations to hypobaric hypoxia. Among Tibetan plateau peoples, these include increased vasodilation and uncoupling of erythropoiesis from hypoxia.

OBJECTIVE/METHODS

We tested the hypothesis that these high-altitude adaptations reduce risk for hypertension and diabetes-associated anemia among the Mosuo, a Tibetan-descended population in the mountains of Southwest China that is experiencing rapid economic change and increased chronic disease risk.

RESULTS

Hypertension was substantially less common among Mosuo than low-altitude Han populations, and models fit to the Han predicted higher probability of hypertension than models fit to the Mosuo. Diabetes was positively associated with anemia among the Han, but not the Mosuo.

CONCLUSION

The Mosuo have lower risk for hypertension and diabetes-associated anemia than the Han, supporting the hypothesis that high-altitude adaptations affecting blood and circulation intersect with chronic disease processes to lower risk for these outcomes. As chronic diseases continue to grow as global health concerns, it is important to investigate how they may be affected by local genetic adaptations.

Red Blood Cells Aggregation in the Patients with Type 2 Diabetes and T2D Associated Anemia, a Case Control Study in Bangladesh

Background and Aims: Type 2 Diabetes (T2D) is a chronic metabolic disorder. Nowadays the number of people with diabetes mellitus is quadrupling in the world as well as in Bangladesh. It is related to different types of disease morbidity and sociodemographic parameters. The present study aimed to investigate the association of RBC aggregation (measured by ESR level) with T2D and T2D associated anemia.

Material and method: A total of 234 subjects were included in the study. Sociodemographic and anthropometric information about study subjects were collected using a standard questionnaire. Blood samples were tested for random blood glucose levels, Hb percentage, and ESR. Association of these data with metabolic disorders was analyzed by statistical analysis software, SPSS.

Results: This study provides a piece of evidence that anemia is highly prevalent in T2D patients than the healthy control subjects in Bangladesh (59.1% vs 22.5%; P value <0.001). The ESR values were significantly elevated in T2D patients as well as anemic and aged subjects (P value <0.001).

Conclusion: The study thus suggests that anemia was prevalent in T2D patients in Bangladesh. The RBC aggregation was significantly elevated in patients with T2D as well as anemia, indicating increased inflammatory response in these diseases.

Anemia and Its Associated Factors Among Type 2 Diabetes Mellitus Patients Attending Debre Berhan Referral Hospital, North-East Ethiopia: A Cross-Sectional Study

PURPOSE

Anemia is one of the common complications of diabetes mellitus (DM), which has an adverse effect on the progression and development of other diabetes-related complications. In spite of this, relatively little information is available on the prevalence of anemia and associated factors among type 2 diabetes mellitus (T2DM) patients in Ethiopia, particularly in the study area. Thus, this study assessed the prevalence of anemia and associated factors among T2DM patients at Debre Berhan Referral Hospital (DBRH), North-East, Ethiopia.

PATIENTS AND METHODS

A hospital-based cross-sectional study was conducted from April 1 to May 30, 2019, among 249 T2DM patients with follow up at DBRH, selected using a systematic random sampling technique. Data were collected by face-to-face interviews, anthropometric measurements, and laboratory tests; such as hemoglobin measurements, red blood indices, and serum creatinine analysis. The data were coded and entered into Epi-data manager version 4.4.1.0, and analysis by using SPSS version 22 was carried out. To identify the determinant factors of anemia, bivariate and multivariate logistic regression analyses were performed. P-value <0.05 was considered as statistically significant.

RESULTS

The study showed 20.1% of the participants were anemic. Being age >60 years (AOR=3.06, 95% CI: 1.32-7.11), poor glycemic control (AOR=2.95, 95% CI: 1.22-7.15), eGFR 60-89.9 mL/min/1.73m2 (AOR=2.91, 95% CI: 1.15-7.37), eGFR <60 mL/min/1.73m2 (AOR=6.58, 95% CI: 2.42-17.93), DM duration >10 years (AOR= AOR=2.75, 95% CI: 1.17-6.48), and having diabetic complications (AOR=3.81, 95% CI: 1.65-8.81) were significantly associated with anemia.

CONCLUSION

One out of five T2DM patients had anemia. Poor glycemic control, decreased eGFR, presence of DM complications, duration of DM >10 years, and age >60 years were significantly associated with the occurrence of anemia among T2DM. Regular screening for anemia in all T2DM patients may help in the early detection and management of anemia.

Modulation of Hematological Indices of Normal and Alloxan-Induced Diabetic Rabbits by Aqueous Extract of Pleurotus tuberregium Sclerotia

OBJECTIVE

The ability of an aqueous extract of the sclerotia of Pleurotus tuberregium to modulate hematological parameters was investigated in normal and alloxan treated rabbits.

METHODS

The extract was subjected to atomic absorption spectrophotometric and flame ionization detector-coupled-gas chromatographic (GC-FID) analysis. Diabetes mellitus was induced by a 120 mg/kg body weight intravenous injection of alloxan. Metformin was orally administered at 50 mg/kg, while the extract was administered (both to normal and diabetic rabbits) at 100, 200 and 300 mg/kg.

RESULTS

Analysis of the extract showed that it had high contents of calcium, magnesium, manganese and potassium. Eleven known glycosides were detected, comprising mainly of amygdalin (37.7%), digoxin (14.4%), dhurrin (14.0%), linamarin (13.6%), prunasin (10.8%) and digitoxin (8.4%). Also detected were twelve known saponins, consisting mainly of sapogenin (40.3%) and neochlorogenin (21.8%); and twelve known lignans, consisting mainly of matairesinol (59.7%), secoisolariciresinol (20.9%) and lariciresinol (14.9%). Compared to the Diabetic control, the hematocrit, hemoglobin concentration, mean cell hemoglobin, mean cell hemoglobin concentration, mean corpuscular volume, red cell distribution width; and red cell, total white cell, lymphocytes, granulocytes and platelet counts of the treated groups were significantly (p<0.05) higher.

CONCLUSION

The above result showed that the extract had a positive effect on the hemopoietic system of the treated animals, at least at the doses at which it was administered in this study.

Prevalence of anemia in diabetic adult outpatients in Northeast Ethiopia

Background

Anemia is a common finding in patients with diabetes, even in the absence of kidney disease and is a risk factor for adverse outcomes, including all-cause and cardiovascular mortality. Despite this, relatively little is known about the burden of anemia among adults with diabetes in sub-Saharan Africa. The aim of this study was to determine the prevalence of anemia and its association with renal disease among diabetic adult outpatients attending a hospital in Northeast Ethiopia.

Methods

A cross-sectional study was conducted among 412 diabetic adults at the diabetes clinic of Dessie Referral hospital in Northeast Ethiopia, from January to April 2018. Each patient provided a blood sample for hemoglobin and serum creatinine levels and urine for albuminuria. Anemia was defined by World Health Organization criteria (<13 g/dl for men and <12 g/dl for women). Glomerular filtration rate (GFR) was estimated using the 4-variable Modification of Diet in Renal Disease (MDRD) equation. Chronic kidney disease (CKD) was classified into 5 stages based on the eGFR and albuminuria.

Results

Anemia was present in 26.7% of the participants, and CKD in 43.0%. Anemia was more prevalent in patients with CKD (39.5%) than those without CKD (17.0%; P < 0.001). The prevalence of anemia increased with stage of CKD, from 22.6% at stage 1 to 100% at stage 4. Fifteen percent of the patients had anemia below the treatment threshold of 11 g ⁄dl. In multivariate analysis, older age (AOR = 2.41, 95% CI 1.11–5.21); type 2 diabetes (AOR = 2.40, 95% CI 1.14–5.08); presence of hypertension (AOR = 3.78, 95% CI 1.35–10.57); high systolic BP (AOR = 1.05, 95% CI 1.02–1.08); serum creatinine (AOR = 12.80, 95% CI 3.90–87.98) and low GFR (AOR = 9.50, 95% CI 4.05–22.28) were independently associated with greater odds for the presence of anemia

Conclusions

Anemia is commonly present among diabetic adults attending our diabetes outpatient clinic in Northeast Ethiopia, including those without kidney disease. Our findings highlight the need for incorporating anemia screening into routine diabetes care to enable early detection and treatment of anemia and hence improve the overall care of patients with diabetes.

Antidiabetic effects and erythrocyte stabilization by red cabbage extract in streptozotocin-treated rats

The protective effect of red cabbage extract (RCE) was evaluated in rats with streptozotocin-induced diabetes, assessing a probable role of this extract in the prevention of erythrocyte impairments associated with a high risk of vascular complications in diabetes. RCE was analyzed by ultrahigh performance liquid chromatography and mass spectrometry, and 11 anthocyanins, 3 hydroxybenzoic acids and 9 hydroxycinnamic acids were identified. Type 1 diabetes was induced by streptozotocin (60 mg kg^-1) in Wistar male rats (n = 8 per group). After 7 days of acclimatization, streptozotocin-treated rats were given RCE (800 mg kg^-1) or vehicle by intragastric administration for 4 weeks. The RCE treatment lowered blood glucose, and glycated and fetal hemoglobin concentrations and improved glucose tolerance as well as considerably raised serum insulin, proinsulin and C-peptide levels in streptozotocin-treated rats. Simultaneously, RCE improved pancreatic islet morphology, increasing the amount of pancreatic β-cells in diabetic animals. The RCE administration prevented anemia in rats with streptozotocin-induced diabetes, enhanced erythrocyte resistance to acid hemolysis, and normalized reticulocyte production as well as sialic acid content in erythrocyte membranes. The enhanced lectin-induced erythrocyte aggregation in diabetic rats was significantly lowered after the RCE treatment. RCE demonstrated a significant antioxidant effect, decreasing MDA and protein carbonyl contents and increasing catalase and glutathione peroxidase activities in erythrocytes. These results indicate that RCE can be considered as a promising candidate for use as a drug or a food supplement to alleviate diabetes and its vascular complications.

Diabetic Retinopathy Awareness and Associations with Multiple Comorbidities: Insights from DIAMOND Study

BACKGROUND

Diabetic retinopathy (DR) is leading cause of visual impairment in working-age adults. Macular edema can occur with or without other signs of retinopathy.

METHODS

This was a single-center, retrospective study conducted over 2 years in patients (>40 years of age) having type 2 diabetes mellitus (T2DM). Outcome measures were to analyze awareness and prevalence of DR and association of DR with identified risk factors.

RESULTS

Overall 6000 T2DM patients over 2 years were retrospectively evaluated. Almost 63% (n = 3780) of patients were unaware that diabetes affects the retina. Almost 65% (n = 3894) of patients were reported to have DR. Total 78.98% of males, and 69.50% of females had DR. There was a significant increase in the incidence of DR with age (P < 0.00001). Almost 60.80% (n = 3653) of patients having DR were from working age group (40-70 years). Evidently, 42% (n = 2520) of patients having DR had HbA1c > 9% (P < 0.00001). Overall 52.02% (n = 1820) of smokers were reported of DR (P < 0.00001). With the increase in total cholesterol and triglycerides, there was a significant increase in DR incidence (P < 0.00001). A strong association was observed between hypertension and DR, with 42.6% (n = 2556) of patients having coexistence of hypertension and DR (P < 0.00001). Patients having diabetic kidney disease (DKD) also reported DR. A high proportion of patients (49.11%, n = 2947) had co-existence of cardiac morbidity and DR. Almost 47% (n = 2845) of patients having DR were also reported anemia. Totally 43.85% (n = 2631) of patients with microalbuminuria had two times more risk of developing proliferative DR (P < 0.00001). The statistical significance for the association of DR with risk factors, calculated by Pearson Chi-Square method of analysis was found statistically significant (P < 0.00001).

CONCLUSION

The study reported the high prevalence and significantly high unawareness for DR in T2DM patients. All the risk factors are independently and significantly associated with DR (P < 0.00001).

Anemia in diabetes: Experience of a single treatment center in Kuwait

AIMS

Diabetes mellitus is the most common metabolic disorder in Kuwait. Anemia is a known outcome of diabetes and its related complications. This study examined the prevalence of anemia in diabetic subjects in Kuwait as well as any association between the presence of anemia with Hemoglobin A_1c and diabetes complications.

METHODS

The study subjects were diabetic patients with complete records and two or more visits at Dasman Diabetes Institute. Patient's data included demographics, complications, medications and laboratory results. Descriptive statistics were applied using SPSS.

RESULTS

Of 1580 included diabetic patients; the prevalence of anemia was 28.5% (95% CI: 26.3, 30.8). Diabetic females had a higher rate of anemia compared to males (35.8% vs. 21.3% respectively, p<0.001). There was no association between diabetes control (HbA_1c) and anemia in both genders (p=0.887). Patients with elevated serum creatinine and microalbuminuria were more likely to be anemic (p<0.001). Diabetic patients with anemia had higher presence of peripheral neuropathy and diabetic foot (p<0.001).

CONCLUSION

This study shows high prevalence of anemia in diabetic patients, particularly in those with diabetic complications. These results should prompt treatment centers to include anemia investigation and management within their diabetes treatment protocols to reduce morbidity in diabetes.

Does tight control of systemic factors help in the management of diabetic retinopathy?

Diabetic retinopathy (DR), one of the leading causes of preventable blindness, is associated with many systemic factors that contribute to the development and progression of this microvascular complication of diabetes. While the duration of diabetes is the major risk factor for the development of DR, the main modifiable systemic risk factors for development and progression of DR are hyperglycemia, hypertension, and dyslipidemia. This review article looks at the evidence that control of these systemic factors has significant benefits in delaying the onset and progression of DR.

Glycaemia Status, Lipid Profile and Renal Parameters in Progressive Diabetic Neuropathy

INTRODUCTION

Diabetic Peripheral Neuropathy (DPN) is a common complication of diabetes. Existence of systemic co-morbidities in DPN patients has not been studied much, especially in Indian population.

AIM

To evaluate glycaemic status, lipid profile, renal parameters and blood count to assess occurrence of co-morbidities as severity of DPN progresses.

MATERIALS AND METHODS

A case control study involving 104 DPN patients and 43 controls of age 31-70years were selected. Patients were categorized into stage 0, 1, 2 and 3 of severity as per Dyck system of classification. Fasting Blood Sugar (FBS), Post Prandial Blood Sugar (PPBS), Glycosylated haemoglobin (HbA1c), Lipid profile, Vitamin B12, Thyroid Stimulating Hormone, Urea, Creatinine and Complete blood counts were assessed along with baseline characteristics.

RESULTS

Glycosylated haemoglobin was in uncontrolled range for DPN patients (9.03±2.09) FBS and PPBS were significantly more with progress of severity of DPN (p<0.001). HDL decreased (p<0.001) as severity progressed and Triglyceride increased in DPN cases. Mean urea values increased (p=0.008) while haemoglobin levels and RBC count decreased (p<0.001) as severity of DPN progressed.

CONCLUSION

Abnormal lipid profile, increased urea and decreased RBC levels point to co-existence of cardiovascular and renal comorbidities as severity of DPN progressed.

A Nonhematopoietic Erythropoietin Analogue, ARA 290, Inhibits Macrophage Activation and Prevents Damage to Transplanted Islets

BACKGROUND

Erythropoietin exerts anti-inflammatory, antiapoptotic, and cytoprotective effects in addition to its hematopoietic action. A nonhematopoietic erythropoietin analogue, ARA 290, has similar properties. The efficacy of pancreatic islet transplantation (PITx) is reduced due to islet damage that occurs during isolation and from the severe inflammatory reactions caused by the transplantation procedure. We investigated whether ARA 290 protects islets and ameliorates inflammatory responses following PITx thus improving engraftment.

METHODS

The effects of ARA 290 on pancreatic islets of C57BL/6J (H-2) mice and on murine macrophages were investigated using an in vitro culture model. As a marginal PITx, 185 islets were transplanted into the liver of streptozotocin-induced diabetic mice (H-2) via the portal vein. Recipients were given ARA 290 (120 μg/kg) intraperitoneally just before and at 0, 6, and 24 hours after PITx. Liver samples were obtained at 12 hours after PITx, and expression levels of proinflammatory cytokines were assessed.

RESULTS

ARA 290 protected islets from cytokine-induced damage and apoptosis. Secretion of pro-inflammatory cytokines (IL-6, IL-12, and TNF-α) from macrophages was significantly inhibited by ARA 290. After the marginal PITx, ARA 290 treatment significantly improved the blood glucose levels when compared to those of control animals (P < 0.001). Upregulation of monocyte chemoattractant protein-1, macrophage inflammatory protein-1β, IL-1β, and IL-6 messenger RNA expression within the liver was suppressed by ARA 290 treatment.

CONCLUSIONS

ARA 290 protected pancreatic islets from cytokine-induced damage and apoptosis and ameliorated the inflammatory response after PITx. ARA 290 appears to be a promising candidate for improvement of PITx.

Hospitalization and 1-year all-cause mortality in type 2 diabetic patients with chronic kidney disease at Stages 1 and 2: Effect of mild anemia

BACKGROUND

The effect of anemia in advanced chronic kidney disease (CKD) on morbidity and mortality is known. The aim of the present study was to assess the effect of mild anemia on hospitalization and 1-year all-cause mortality in type 2 diabetes mellitus (T2DM) patients with Stage 1 and 2 CKD.

METHODS

Hospitalized T2DM patients (n = 307) with a glomerular filtration rate ≥ 60 mL/min per 1.73 m(2) and urinary albumin excretion > 30 mg/24 h (Stage 1 and 2 CKD) were enrolled in the study and divided into two groups based on hemoglobin (Hb) concentrations: those with (mean [ ± SD] Hb 10.7 ± 0.7 g/dL) and without (mean Hb 13.3 ± 1.28 g/dL) anemia.

RESULTS

There was no significant difference between patients with and without anemia in terms of age, gender, body mass index, HbA1c, and cardiovascular diseases. The mean length of hospitalization of the 130 anemic and 177 non-anemic patients was 4.3 ± 3.5 and 3.5 ± 1.9 days, respectively (P < 0.001). Twelve anemic patients died within 1 year, compared with three patients without anemia (9.2% vs 1.7%, respectively; P = 0.002). After adjusting for confounding variables, multivariate Cox regression analysis revealed that mild anemia was significantly associated with 1-year all-cause mortality (hazard ratio 2.15, 95% confidence interval 1.92-2.54; P = 0.033).

CONCLUSIONS

Mild anemia may increase the length of hospitalization and was associated with 1-year all-cause mortality among hospitalized T2DM patients with Stage 1 and 2 CKD.

Aqueous leaf extract of Ocimum gratissimum improves hematological parameters in alloxan-induced diabetic rats via its antioxidant properties

OBJECTIVE

This study was designed to investigate the effects of Ocimum gratissimum (OG) on hematological parameters and oxidative stress in diabetic rats.

MATERIALS AND METHODS

Twenty-five male rats (150-200 g) were randomly grouped into five as control, normal + OG, diabetic untreated, diabetic + OG, and diabetic + glibenclamide groups. Diabetes was induced by 100 mg/kg of alloxan monohydrate in the diabetic untreated and diabetic + OG groups followed by treatment with distilled water and 400 mg/kg OG, respectively, whereas control, normal + OG, and diabetic + glibenclamide groups were treated with distilled water, 400 mg/kg OG, and 5 mg/kg glibenclamide, respectively. Body weight and fasting blood glucose level were monitored weekly. After 28 days of treatments, under anesthesia induced by 50 mg/kg sodium thiopental i.p., blood samples were obtained for hematological analysis, malondialdehyde (MDA) level determination, and superoxide dismutase (SOD) activity. Data were compared using analysis of variance and Student's t-test.

RESULTS

There was a significant decrease in the fasting blood glucose of the diabetic + OG animals compared to the diabetic untreated and the initial reduction in weight observed in this group was reversed at the end of the experiments. Packed cell volume, red blood cell count, and hemoglobin concentration were significantly increased (P < 0.05) in the diabetic + OG when compared with the untreated group. The MDA concentration was significantly lowered (P < 0.01) in the diabetic + OG group when compared with diabetic untreated while SOD activity was significantly reduced in the diabetic untreated group.

CONCLUSION

It was concluded that OG reverses anemia secondary to alloxan-induced diabetes mellitus in rats probably via its antioxidant activity.

Hepcidin-25 in diabetic chronic kidney disease is predictive for mortality and progression to end stage renal disease

Background

Anemia is common and is associated with impaired clinical outcomes in diabetic chronic kidney disease (CKD). It may be explained by reduced erythropoietin (EPO) synthesis, but recent data suggest that EPO-resistance and diminished iron availability due to inflammation contribute significantly. In this cohort study, we evaluated the impact of hepcidin-25—the key hormone of iron-metabolism—on clinical outcomes in diabetic patients with CKD along with endogenous EPO levels.

Methods

249 diabetic patients with CKD of any stage, excluding end-stage renal disease (ESRD), were enrolled (2003–2005), if they were not on EPO-stimulating agent and iron therapy. Hepcidin-25 levels were measured by radioimmunoassay. The association of hepcidin-25 at baseline with clinical variables was investigated using linear regression models. All-cause mortality and a composite endpoint of CKD progression (ESRD or doubling of serum creatinine) were analyzed by Cox proportional hazards models.

Results

Patients (age 67 yrs, 53% male, GFR 51 ml/min, hemoglobin 131 g/L, EPO 13.5 U/L, hepcidin-25 62.0 ng/ml) were followed for a median time of 4.2 yrs. Forty-nine patients died (19.7%) and forty (16.1%) patients reached the composite endpoint. Elevated hepcidin levels were independently associated with higher ferritin-levels, lower EPO-levels and impaired kidney function (all p<0.05). Hepcidin was related to mortality, along with its interaction with EPO, older age, greater proteinuria and elevated CRP (all p<0.05). Hepcidin was also predictive for progression of CKD, aside from baseline GFR, proteinuria, low albumin- and hemoglobin-levels and a history of CVD (all p<0.05).

Conclusions

We found hepcidin-25 to be associated with EPO and impaired kidney function in diabetic CKD. Elevated hepcidin-25 and EPO-levels were independent predictors of mortality, while hepcidin-25 was also predictive for progression of CKD. Both hepcidin-25 and EPO may represent important prognostic factors of clinical outcome and have the potential to further define “high risk” populations in CKD.

Genetic disposition and modifiable factors independently associated with anemia in patients with type 2 diabetes mellitus

AIMS

Anemia is prevalent but under-recognized in patients with diabetes mellitus (DM). Genetic variants in angiotensin-converting enzyme (ACE), tumor necrosis factor-alpha (TNF-α) and erythropoietin (EPO) have been associated with diabetic nephropathy. In the present study, we investigated the associations between anemia and polymorphisms in EPO promoter (rs1617640), TNF-α G-308A and ACE Insertion/Deletion in Chinese patients with type 2 diabetes.

METHODS

Polymorphisms in ACE, TNF-α and EPO were genotyped in 1142 patients. Anemia was defined as hemoglobin (Hb) levels below 12 g/dL for women and 13 g/dL for men.

RESULTS

286 (25%) patients had anemia. Patients with anemia were older, had longer duration of diabetes, worse renal function and more albuminuria. ACE Insertion/Deletion and TNF-a G-308A were not associated with anemia. The frequencies of EPO polymorphism (rs1617640) were significantly different between anemic and nonanemic patients. Patients with TT genotype had higher prevalence of anemia than those with TG and GG. Regression analysis identified EPO SNP, duration of DM, serum albumin, albuminuria and renal function independently associated with anemia. After adjusting for multiple variables, TT and TG genotypes were associated with 3-5-fold increased risk for anemia compared to GG.

CONCLUSIONS

The EPO genotype in Chinese patients with type 2 diabetes is associated with anemia and may help to identify those at risk. Further evaluation of its effect on clinical outcomes in prospective studies may be useful to predict the outcomes of erythropoiesis stimulating therapy, and to individualize anemia management.

Erythropoietin and glucose homeostasis in women at varying degrees of future diabetic risk

AIMS/BACKGROUND

Recently, there has been considerable interest in the potential anti-diabetic effects of erythropoietin in animal models. It is not known, however, whether endogenous erythropoietin is associated with glucose regulation in humans.

METHODS

We evaluated the longitudinal relationship between endogenous erythropoietin at 3-months postpartum and glucose homeostasis at 12-months postpartum in a cohort of 229 women with varying degrees of glucose intolerance in their recent pregnancy, a model of the early natural history of pre-diabetes/diabetes. The women reflected the full spectrum of glucose tolerance in pregnancy from normal (n=63) to mildly abnormal (n=65) to gestational impaired glucose tolerance (n=46) to gestational diabetes (n=55), and hence a broad range of future diabetic risk.

RESULTS

At 3-months postpartum, there was no difference in serum erythropoietin between these 4 groups (p=0.22). After covariate adjustment, erythropoietin was not associated with beta-cell function, insulin sensitivity, or glycemia at either 3- or 12-months postpartum. On multiple linear regression analyses, however, erythropoietin at 3-months emerged as an independent predictor of both systolic (beta=0.51326, p=0.003) and diastolic blood pressure (beta=0.3321, p=0.01) at 12-months.

CONCLUSION

Endogenous erythropoietin is not associated with glucose homeostasis early in the natural history of metabolic disease, but may be relevant to vascular health.

A non-erythropoietic peptide derivative of erythropoietin decreases susceptibility to diet-induced insulin resistance in mice

BACKGROUND AND PURPOSE

The haematopoietic activity of erythropoietin (EPO) is mediated by the classic EPO receptor (EpoR) homodimer, whereas tissue-protective effects are mediated by a heterocomplex between EpoR and the β-common receptor (βcR). Here, we investigated the effects of a novel, selective ligand of this heterocomplex - pyroglutamate helix B surface peptide (pHBSP) - in mice fed a diet enriched in sugars and saturated fats.

EXPERIMENTAL APPROACH

Male C57BL/6J mice were fed a high-fat high-sucrose diet (HFHS) for 22 weeks. pHBSP (30 μg·kg(-1) s.c.) was administered for the last 11 weeks. Biochemical assays, histopathological and immunohistochemical examinations and Western blotting were performed on serum and target organs (liver, kidney and skeletal muscle).

KEY RESULTS

Mice fed with HFHS diet exhibited insulin resistance, hyperlipidaemia, hepatic lipid accumulation and kidney dysfunction. In gastrocnemius muscle, HFHS impaired the insulin signalling pathway and reduced membrane translocation of glucose transporter type 4 and glycogen content. Treatment with pHBSP ameliorated renal function, reduced hepatic lipid deposition, and normalized serum glucose and lipid profiles. These effects were associated with an improvement in insulin sensitivity and glucose uptake in skeletal muscle. Diet-induced overproduction of the myokines IL-6 and fibroblast growth factor-21 were attenuated by pHBSP and, most importantly, pHBSP markedly enhanced mitochondrial biogenesis in skeletal muscle.

CONCLUSIONS AND IMPLICATIONS

Chronic treatment of mice with an EPO derivative, devoid of haematopoietic effects, improved metabolic abnormalities induced by a high-fat high-sucrose diet, by affecting several levels of the insulin signalling and inflammatory cascades within skeletal muscle, while enhancing mitochondrial biogenesis.

Nonregenerative anemia: mechanisms of decreased or ineffective erythropoiesis

In veterinary medicine, anemia without an appropriate compensatory hematopoietic response is termed nonregenerative. Nonregenerative anemia is a common clinical entity, occurring as a result of diminished or ineffective erythropoiesis in association with many types of pathology. This article reviews nonregenerative anemia in domestic animals, emphasizing mechanisms of disease, and also covers other conditions associated with nonregenerative anemia in people. Many aspects of nonregenerative anemia in animals are worthy of further investigation, from molecular mechanisms of disease to epidemiologic impacts.

Erythropoietin attenuates oxidative stress and apoptosis in Schwann cells isolated from streptozotocin-induced diabetic rats

OBJECTIVES

High glucose-evoked oxidative stress and apoptosis within Schwann cells (SCs) are mechanisms facilitating the procession of diabetic peripheral neuropathy (DPN). Although erythropoietin (EPO) was demonstrated to have neuroprotective effects in neurodegenerative diseases, the effects of EPO on glucose-evoked oxidative stress and apoptosis of SCs remain unknown.

METHODS

Primary cultured SCs isolated from streptozotocin (STZ)-induced diabetic peripheral neuropathic rats and normal control rats were exposed to high or normal glucose condition with or without EPO incubation for 72 h. Cell viability, apoptotic rate, cellular reactive oxygen species (ROS) level, total glutathione (GSH) level, EPO mRNA and erythropoietin receptor (EPOR) mRNA levels were assayed.

KEY FINDINGS

SCs from diabetic rats showed a lower cell viability and a higher apoptotic rate. High glucose culture condition elevated ROS level and diminished total GSH level of SCs. EPO improved cell viability and decreased cell apoptotic rate of SCs. EPO also elevated total GSH level and decreased intracellular ROS level. SCs from diabetic rats exhibited higher EPO mRNA and EPOR mRNA levels than SCs from normal control rats.

CONCLUSIONS

The data of this study offered fresh viewpoints for interpreting the pathogenesis of DPN and novel pharmacological principles implicit in the therapeutic effect of EPO.

Elevation of HbA1C in Non-diabetic Hypothyroid Individuals: Is Anaemia the Connecting Link? -A Preliminary Study

AIM

Studies have shown elevated HbA1C in non-diabetic hypothyroid patients. Hypothyroid patients often show anaemia as an associated feature which is an another condition showing falsely elevated A1C. Hence this study is aimed to investigate whether elevated A1C in hypothyroidism can be attributed to anaemia.

MATERIAL AND METHODS

HbA1C levels of 120 non-diabetic hypothyroid patients (30 microcytic hypochromic anaemia, 30 normocytic normochromic anaemia and 60 non anemic patients) with 120 age, sex, plasma glucose levels and anaemia status matched controls were assessed. Anaemia status was determined by ferritin, Haemoglobin, red cell indices and peripheral smear. Glycemic status was determined by fasting Plasma glucose.

RESULTS

HbA1C levels in hypothyroid patients with hypochromic microcytic anaemia and normocytic normochromic anaemia were 6.82 ± 0.71% & 6.32 ± 0.75% against 6.43 ± 0.43% & 5.87 ± 0.46 % of euthyroid anaemia matched controls respectively. While hypothyroid non anemic patients showed A1C levels of 5.91 ± 0.31% against 5.46 ± 0.62% of euthyroid non anemic controls. Hypothyroid Patients with anaemia had a significant odds ratio 3.16 (95% CI 1.426-7.016) for HbA1C > 6.5.

DISCUSSION AND CONCLUSION

Non-diabetic hypothyroid individuals with anaemia shows elevate A1C levels in prediabetes range. Hence care should be excercised while using HbA1C as a diagnostic tool for diabetes in such patients.

Erythropoietin ameliorates podocyte injury in advanced diabetic nephropathy in the db/db mouse

Podocyte damage and accumulation of advanced glycation end products (AGEs) are characteristics of diabetic nephropathy (DN). The pathophysiology of AGE-challenged podocytes, such as hypertrophy, apoptosis, and reduced cell migration, is closely related to the induction of the cell cycle inhibitor p27Kip1 and to the inhibition of neuropilin 1 (NRP1). We have previously demonstrated that treatment with erythropoietin is associated with protective effects for podocytes in vitro. db/ db mice with overt DN aged 15–16 wk were treated with either placebo, epoetin-β, or continuous erythropoietin receptor activator (CERA) for 2 wk. db/ db mice compared with nondiabetic db/ m control mice revealed the expected increases in body weight, blood glucose, albumin-to-creatinine ratio, and AGE accumulation. Whereas there were no differences in body weight, hyperglycemia and AGEs were observed among diabetic mice that received epoetin-β compared with CERA and placebo treatment, indicating that epoetin-β/CERA treatment does not interfere with the development of diabetes in this model. However, the albumin-to-creatinine ratio was significantly lower in db/ db mice treated with epoetin-β or CERA. Furthermore, kidney weights in db/ db mice were increased compared with db/ m control mice, indicating renal hypertrophy, whereas the increase in renal weight in epoetin-β- or CERA-treated db/ db mice was significantly lower than in placebo-treated control mice. Induction of p27Kip1 and suppression of NRP1 were significantly reduced in the epoetin-β treatment group versus the CERA treatment group. Furthermore, erythropoietin treatment diminished the diabetes-induced podocyte loss. Together, independently from hematopoetic effects, epoetin-β or CERA treatment was associated with protective changes in DN, especially that NRP1 and p27Kip1 expressions as well as numbers of podocytes returned to normal levels. Our data show, for the first time, that medication of overt DN with erythropoietin for a short time can ameliorate albuminuria and podocyte loss.

An experimental assessment of toxic potential of nanoparticle preparation of heavy metals in streptozotocin induced diabetes

Nanoparticle preparations of heavy metals have attracted enormous scientific and technological interest. Biologically produced nanoparticle preparations of heavy metals are elaborately described in traditional texts and being widely prescribed. The underlying interactions of nano preparations within the physiological fluids are key feature to understand their biological impact. In this perspective, we performed an experimental assessment of the toxicity potential of a marketed metallic preparation named Vasant Kusumakar Ras (VKR), wherein different heavy metals in composite form are reduced to nanoparticle size to produce the desired effect in diabetes and its complications. VKR (50mg/kg) was administered to Albino Wistar rats rendered diabetic using streptozotocin (90mg/kg) in 2 days old neonates. Anti-hyperglycemic effect was observed with VKR along with increased levels of plasma insulin. Renal variables including total proteins and albumin along with glomerular filtration rate were found to improve biochemically. The results were supplemented by effects on different inflammatory and growth factors like TNF-α, nitric oxide, TGF-β and VEGF. However, the results observed in kidney histopathology were not in accordance with the biochemical parameters. Inflammation observed in kidney was confirmed by immunostaining metallothionein, which was due to the accumulation of heavy metals. Furthermore, mercury accumulation in kidney further confirmed by autometallography, which activated mononuclear phagocyte system, which generated an immune response. This was further supported by increase in the extent of apoptosis in kidney tissues. In conclusion, nanoparticle preparations of heavy metals can be toxic to kidney if it is not regulated with respect to its surface chemistry and dosage.

Red blood cell count as an indicator of microvascular complications in Chinese patients with type 2 diabetes mellitus

BACKGROUND

Rheological disorders of red blood cells (RBC) and decreased RBC deformability have been involved in the development of diabetic microangiopathy. However, few studies have evaluated the association of RBC count with microvascular complications in patients with type 2 diabetes mellitus (T2DM). The purpose of this study was to investigate the association of RBC count with microvascular complications in patients with T2DM.

METHODS

This study involved 369 patients with T2DM: 243 with one or more microvascular complications and 126 without microvascular complications. Anticoagulated blood was collected and analyzed in an automated blood cell counter. The presence of risk factors for microvascular complications was determined.

RESULTS

The proportion of patients with microvascular complications increased as the RBC count decreased (P < 0.001). After adjustment for known risk factors for microvascular complications by logistic regression analysis, lower quartiles of RBC count were associated with a higher risk of microvascular complications compared with the reference group composed of the highest quartile (first quartile, odds ratio 4.98, 95% confidence interval 1.54-6.19, P = 0.008; second quartile, odds ratio 3.21, 95% confidence interval 1.17-5.28, P = 0.024).

CONCLUSION

A decreased RBC count is associated with microvascular complications in Chinese patients with T2DM. The RBC count is a potential marker to improve further the ability to identify diabetic patients at high risk of microvascular complications.

Association of anemia and renal function test among diabetes mellitus patients attending Fenote Selam Hospital, West Gojam, Northwest Ethiopia: a cross sectional study

BACKGROUND

Anemia is a common problem in diabetic patients. Diabetic patients have a greater severity of anemia as the level of Glomerular Filtration Rate (GFR) decreases compared to non-diabetic patients. Despite these facts, anemia is unrecognized and largely untreated in patients with diabetes in Ethiopia particularly in those patients attending Fenote Selam Hospital. Therefore, this study was aimed to assess the association of anemia and renal function test among diabetes mellitus patients attending Fenote Selam Hospital, North West of Ethiopia.

METHODS

An Institutional -based cross-sectional study was conducted from February 2012 to April 2012 on diabetes mellitus (DM) patients. Systematic random sampling technique was used to get the total sample size of 384 patients. A total of seven ml of venous blood was collected from diabetes mellitus patients; two ml was collected by EDTA anticoagualted vacutainer test tube for haemoglobin determination and 5 ml venous blood was collected by plain vacutainer tube for creatinine and Blood urea nitrogen determination. The data were double entered and analyzed using SPSS-16 statistical software. The degree of association between independent and dependent variables was assessed using bivariate and multivariate logistic regression analysis in terms of P-value and odds ratio with 95% confidence interval.

RESULTS

Out of the total 384 DM patients included in the study 73 (19%) were anemic. Fifty three (13.8%), forty eight (12.5%), and two hundred eighty three (73.7%) DM patients had an estimated GFR <60 ml/min/1.73 m, 60 - 90 ml/min/ 1.73 m, and > 90 ml/min/1.73 m respectively. One hundred eleven (28.9%) diabetic patients had increased urine albumin level. There was a statistically significant association between anaemia and Glomerular filtration rate (P<0.05) with Odds ratio of 8.58 and CI (10.21, 49.94). As the glomerular filtration rate increase, the risk to be anemic will decrease dramatically.

CONCLUSION

The study showed that there was a significant association between anaemia and Glomerular filtration rate in DM patients. Therefore, DM patients should be strictly monitored for renal failure and anemia for proper management of diabetes patients.

Risk factors for clinically significant macular edema in a multi-ethnics population with type 2 diabetes

AIM

To determine the risk factors of clinically significant macular edema (CSME) in patients with non-proliferative diabetic retinopathy (NPDR) in a multi-ethnics Malaysian population.

METHODS

We performed a case control study in which 150 patients with bilateral NPDR and CSME in either eye were compared to 150 patients with bilateral NPDR and no CSME in both eyes. CSME and NPDR were graded according to Early Treatment of Diabetic Retinopathy Study criteria. Student's t-test, odds ratio and multiple logistic regression analysis were performed to analyze the duration of diabetes, body mass index (BMI), blood pressure(BP), total cholesterol, low density lipoprotein (LDL), high density lipoprotein (HDL), triglycerides (TG), fasting blood glucose (FBG), HbA1c, full blood count, serum creatinine and proteinuria between the two groups.

RESULTS

Both groups were matched in terms of age, gender and ethnicity. Duration of diabetes, total serum cholesterol, serum LDL, FBG, HbA1c and serum creatinine were significantly higher in the CSME group (P<0.05). The hemoglobin, packed cell volume were significantly lower in the CSME group (p<0.05). There was no significant difference for serum HDL, TG, BMI, systolic and diastolic BP. Multiple logistic regression analysis showed that total serum cholesterol and HbA1c had significantly high odds of developing CSME.

CONCLUSION

HbA1c and total cholesterol are the two most important risk factors associated with CSME in patients with NPDR.

Endogenous erythropoietin and the association with inflammation and mortality in diabetic chronic kidney disease

BACKGROUND AND OBJECTIVES

Anemia and inflammation are prevalent in diabetic patients with chronic kidney disease (CKD). The role of endogenous erythropoietin (EPO) in the pathophysiology of anemia in chronic diseases and its relationship to clinical outcomes remain uncertain. In this cohort study, we aimed to identify factors associated with endogenous EPO levels and investigate their relation to all-cause mortality.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

Between 2004 and 2005, 215 patients with type 2 diabetes were enrolled. Exclusion criteria included stage renal disease ESRD and any form of anemia therapy. The association of EPO levels with clinical and laboratory variables was investigated by linear regression modeling. Predictors of all-cause mortality were evaluated by Cox proportional hazards analyses.

RESULTS

Patients (median age, 67 years; 52% men; median duration of diabetes, 10 years; median estimated GFR, 49 ml/min per 1.73 m²) were followed for up to 7.0 years. Forty-one patients died. Elevated EPO levels were independently associated with elevated C-reactive protein, low ferritin, and hypertension, in a multivariate model that also included age, cardiovascular disease, kidney function, albumin, cholesterol, and hemoglobin. Higher EPO levels were independently predictive for mortality, as were age, low levels of albumin, and cardiovascular disease.

CONCLUSIONS

In diabetic patients with CKD, elevated endogenous EPO levels were predictive for mortality and were related mainly to markers of inflammation, independent of kidney function, and despite low hemoglobin levels. Understanding the phenomenon of EPO resistance and iron dysregulation caused by inflammation is crucial for effective and safe treatment of anemia in patients with CKD.

Erythropoietin protects against diabetes through direct effects on pancreatic beta cells

In mouse models of type 1 and type 2 diabetes, administration of human erythropoietin protects against disease by acting directly on pancreatic β cells.

A common feature among all forms of diabetes mellitus is a functional β-cell mass insufficient to maintain euglycemia; therefore, the promotion of β-cell growth and survival is a fundamental goal for diabetes prevention and treatment. Evidence has suggested that erythropoietin (EPO) exerts cytoprotective effects on nonerythroid cells. However, the influence of EPO on pancreatic β cells and diabetes has not been evaluated to date. In this study, we report that recombinant human EPO treatment can protect against diabetes development in streptozotocin-induced and db/db mouse models of type 1 and type 2 diabetes, respectively. EPO exerts antiapoptotic, proliferative, antiinflammatory, and angiogenic effects within the islets. Using β-cell–specific EPO receptor and JAK2 knockout mice, we show that these effects of EPO result from direct biological effects on β cells and that JAK2 is an essential intracellular mediator. Thus, promotion of EPO signaling in β cells may be a novel therapeutic strategy for diabetes prevention and treatment.

Mild anemia is frequent and associated with micro- and macroangiopathies in patients with type 2 diabetes mellitus

Aims/Introduction:  The present study investigated the frequency of mild anemia, which is not an indication of intensive therapy using drugs, in Japanese patients with type 2 diabetes mellitus and the association of mild anemia with diabetic complications.

MATERIALS AND METHODS

  This is a cross-sectional study of 1189 patients with type 2 diabetes mellitus. Anemia was defined as a hemoglobin level <13.5 g/dL in men and <12.0 g/dL in women. The patients with anemia were divided into two groups: (i) grade 1 anemia with a hemoglobin level ≥11.0 g/dL; and (ii) grade 2 anemia with a hemoglobin level <11.0 g/dL.

RESULTS

  The prevalence of anemia increased with the progression of the stage of diabetic nephropathy and chronic kidney disease. The frequencies of diabetic micro- and macroangiopathies increased with the progression of anemia among 798 patients without anemia, 300 with grade 1 anemia and 91 with grade 2 anemia. Both grade 1 and grade 2 anemia were associated with diabetic micro- and macroangiopathies. They remained independently associated with diabetic retinopathy, coronary heart disease and peripheral arterial disease after adjustment by age, sex, body mass index, use of angiotensin II receptor blocker, estimated glomerular filtration rate and stage of diabetic nephropathy.

CONCLUSIONS

  Mild anemia is frequent and associated with micro- and macroangiopathies in patients with type 2 diabetes mellitus. It is important to carry out intensive examinations for the detection of diabetic micro- and macroangiopathies in addition to evaluating the causes of anemia when mild anemia is found in patients with diabetes mellitus. (J Diabetes Invest, doi: 10.1111/j.2040-1124.2010.00060.x, 2010).

Effects of thyroid hormone on A1C and glycated albumin levels in nondiabetic subjects with overt hypothyroidism

OBJECTIVE

We aimed to determine the effects of thyroid hormone on A1C and glycated albumin (GA) in nondiabetic patients with overt hypothyroidism.

RESEARCH DESIGN AND METHODS

A1C levels were measured in 45 nondiabetic patients with overt hypothyroidism and 180 euthyroid control subjects. A1C, GA, fasting blood glucose (FBG), 1,5-anhydroglucitol, and erythrocyte indexes were determined in 30 nondiabetic patients with overt hypothyroidism before and after thyroid hormone replacement.

RESULTS

A1C levels were higher in patients with hypothyroidism compared with control subjects. A1C levels were decreased by thyroid hormone replacement. Thyroid hormone replacement increased serum erythropoietin, reticulocyte count, and mean corpuscular hemoglobin (MCH). The change in A1C level was significantly correlated with the change in reticulocyte count or MCH. Thyroid hormone replacement decreased serum levels of albumin and GA. However, FBG and 1,5-anhydroglucitol levels were not altered.

CONCLUSIONS

Levels of A1C and GA are spuriously high in nondiabetic patients with overt hypothyroidism.

Insomnia in chronic renal patients on dialysis in Saudi Arabia

BACKGROUND

Studies have shown that insomnia is a common sleep disorder among patients with end-stage renal disease (ESRD). This study aimed to assess the prevalence of insomnia in Saudi patients with ESRD who are on maintenance dialysis.

METHODS

This was an observational cross-sectional study carried out over a period of five months in two hemodialysis centers in Saudi Arabia. To assess the prevalence of insomnia, we used the ICSD-2 definition. We also examined the association between insomnia and other sleep disorders, the underlying causes of renal failure, dialysis duration, dialysis shift, and other demographic data.

RESULTS

Out of 227 enrolled patients, insomnia was reported by 60.8%. The mean patient age was 55.7 +/- 17.2 years; 53.7% were male and 46.3% were female. Insomnia was significantly associated with female gender, afternoon hemodialysis, Restless Legs Syndrome, high risk for obstructive Sleep Apnea Syndrome and excessive daytime sleepiness (P-values: 0.05, 0.01, < 0.0001, < 0.0001, and < 0.0001, respectively). No significant association was found between insomnia and other variables, including BMI, smoking habits, underlying etiology of renal failure, dialysis duration, association with hemoglobin, ferritin, and phosphorus or dialysis adequacy as measured by the Kt/V index.

CONCLUSION

Insomnia is common in dialysis patients and was significantly associated with other sleep disorders. Greater attention needs to be given to the care of dialysis patients with regard to the diagnosis and management of insomnia and associated sleep disorders.

Anemia in diabetic patients at an internal medicine ward: clinical correlates and prognostic significance

BACKGROUND

Characteristics and prognostic significance of anemia in hospitalized diabetic patients are unknown.

METHODS

We studied 3145 unselected patients admitted to two Internal Medicine Departments, 872 (27.7%) of whom were diabetic. Forty diabetic patients died during the first hospitalization period. Out of the remaining 832 patients, 334 (40.2%) were anemic and evaluated for survival. In 87 diabetic patients, the cause of anemia was evident on admission, whereas the other 247 had to be further investigated for etiology of anemia.

RESULTS

Compared to non-anemic diabetic patients, the diabetic anemic patients were older (mean age 71.4 vs. 64.4 years, P<.001) and predominantly females (52.4% vs. 44.4%, P<.02). Of the 247 evaluated patients, 38% were deficient in iron, 12% in vitamin B(12) and/or folate, 54% had anemia of chronic disease, 47% suffered from heart failure, 39% had renal dysfunction and 22% were complex nursing care patients and/or had diabetic foot. On median follow-up of 19.2 months, mortality rate was higher in anemic compared to non-anemic diabetic patients (17.3% vs. 4%, P<.001), the main cause of death being infection. Male sex (P=.03), albuminuria (P=.01) and heart failure (P=.06) were associated with shorter survival, male sex being the most significant (OR 2.02, 95% CI 1.04-4.00).

CONCLUSION

Frequency of anemia was increased in diabetic patients admitted to the Internal Medicine Departments, compared to the studies performed on ambulatory patient populations. Anemia was multifactorial and associated with higher mortality, predominantly from infections. Males with albuminuria and heart failure were at higher risk of death.

Erythropoietin response to anemia and its association with autonomic neuropathy in type 2 diabetic patients without advanced renal failure

AIM

We aim to investigate erythropoietin (EPO) response to anemia and its association with autonomic neuropathy in type 2 diabetic patients without advanced renal failure.

METHODS

A cross-sectional study was conducted on 211 type 2 diabetes mellitus patients without advanced renal failure [estimated glomerular filtration rate (eGFR) >40 ml/min/1.73 m(2)]. The response of EPO to anemia of type 2 diabetic patients without advanced renal failure was compared with those of nondiabetic control subjects. Autonomic nerve function was assessed using three cardiovascular tests (deep breathing, the Valsalva maneuver, and lying-to-standing). The results of each test were scored as 0 if normal, 1 if borderline, and 2 if abnormal. Autonomic neuropathy was diagnosed when a total score of the tests was 2 or more.

RESULTS

Fifty-eight patients were anemic; compared with nonanemic patients, they had a longer duration of diabetes (16.69+/-10.11 vs. 10.67+/-8.41 years, P<.001), lower eGFR (66.43+/-16.30 vs. 81.74+/-19.49 ml/min/1.73 m(2), P<.001), and higher cardiovascular autonomic neuropathy score (3.17+/-1.95 vs. 1.79+/-1.72, P<.001). Serum EPO level was weakly correlated with hemoglobin (Hb) level (r=-.085, P<.001). However, the slopes of regression lines between EPO and Hb levels differed significantly between type 2 diabetic patients and nondiabetic control subjects (-0.0085 vs. -0.255, P=.008). Multiple linear regression analysis revealed that cardiovascular autonomic neuropathy score was independently related to Hb (P<.001) or EPO level (P=.052).

CONCLUSIONS

Autonomic neuropathy is associated with a blunted EPO response to anemia in type 2 diabetic patients without advanced renal failure.