Vitamin B12 Deficiency and Foot Ulcers in Type 2 Diabetes Mellitus: A Case-Control Study

Risk factors for diabetic foot ulcers: A systematic review and meta-analysis

OBJECTIVE

To systematically evaluate the risk factors for developing diabetic foot ulcers (DFU).

METHODS

The Cochrane Library, PubMed, Web of Science, SinoMed, CNKI, VIP, and Wanfang Data were searched for relevant studies on DFU risk factors, and the search time frame was from database creation to March 2022. Meta-analysis was performed using RevMan 5.3.

RESULTS

A total of 26 publications were included, including 3 cohort studies, 22 case-control studies, and one cross-sectional study. Meta-analysis showed that advanced age [MD = 6.04, 95% CI (3.92, 8.16)], male [OR = 1.84, 95% CI (1.48, 2.29)], elevated body mass index [MD = 1.58, 95% CI (0.47, 2.69)], prolonged duration of diabetes [MD = 2.72, 95% CI (2.33, 3.11)], comorbid nephropathy [OR = 3.15, 95% CI (2.68, 4.60)], comorbid neuropathy [OR = 4.80, 95% CI (2.79, 8.27)], comorbid retinopathy [OR = 3.37, 95% CI (2.26, 5.02)], elevated systolic blood pressure [OR = 8.19, 95% CI (6.33, 10.05)], elevated fasting glucose [MD = 1.60, 95% CI (0.21, 3.00)], elevated glycated hemoglobin [MD = 1.24, 95% CI (0.94, 1.54)], elevated triglycerides [MD = 0.44 (95% CI (0.15, 0.73)], elevated fibrinogen [MD = 1.35, 95% CI (0.62, 2.08)], elevated white blood cell count [MD = 2.56, 95% CI (2.24, 2.88)], elevated C-reactive protein [MD = 15.08, 95% CI (8.03, 22.13)], decreased ankle-brachial ratio [MD = -0.26, 95% CI (-0.36, -0.16)], and decreased total protein levels [MD = -4.58, 95% CI (-6.91, -2.25)] were risk factors for developing DFU (p < 0.05), and increased HDL cholesterol levels [MD = -0.22, 95% CI (-0.36, -0.08)] were protective factor for developing DFU (p < 0.05).

CONCLUSION

There are many risk factors for developing of ulcers in the diabetic feet, and early prevention and intervention should be performed as early as possible to assess the risk of developing diabetic foot patients.

Factors Influencing Wound Healing in Diabetic Foot Patients

Background and objectives: Diabetic foot stands out as one of the most consequential and devastating complications of diabetes. Many factors, including VIPS (Vascular management, Infection management, Pressure relief, and Source of healing), influence the prognosis and treatment of diabetic foot patients. There are many studies on VIPS, but relatively few studies on "sources of healing". Nutrients that affect wound healing are known, but objective data in diabetic foot patients are insufficient. We hypothesized that "sources of healing" would have many effects on wound healing. The purpose of this study is to know the affecting factors related to the source of healing for diabetic foot patients. Materials and Methods: A retrospective review identified 46 consecutive patients who were admitted for diabetic foot management from July 2019 to April 2021 at our department. Several laboratory tests were performed for influencing factor evaluation. We checked serum levels of total protein, albumin, vitamin B, iron, zinc, magnesium, copper, Hb, HbA1c, HDL cholesterol, and LDL cholesterol. These values of diabetic foot patients were compared with normal values. Patients were divided into two groups based on wound healing rate, age, length of hospital stay, and sex, and the test values between the groups were compared. Results: Levels of albumin (37%) and Hb (89%) were low in the diabetic foot patients. As for trace elements, levels of iron (97%) and zinc (95%) were low in the patients, but levels of magnesium and copper were usually normal or high. There were no differences in demographic characteristics based on wound healing rate. However, when compared to normal adult values, diabetic foot patients in our data exhibited significantly lower levels of hemoglobin, total protein, albumin, iron, zinc, copper, and HDL cholesterol. When compared based on age and length of hospital stay, hemoglobin levels were significantly lower in both the older age group and the group with longer hospital stays. Conclusions: Serum levels of albumin, Hb, iron, and zinc were very low in most diabetic foot patients. These low values may have a negative relationship with wound healing. Nutrient replacements are necessary for wound healing in diabetic foot patients.

Fish Skin Grafts Affect Adenosine and Methionine Metabolism during Burn Wound Healing

Burn wound healing is a complex process orchestrated through successive biochemical events that span from weeks to months depending on the depth of the wound. Here, we report an untargeted metabolomics discovery approach to capture metabolic changes during the healing of deep partial-thickness (DPT) and full-thickness (FT) burn wounds in a porcine burn wound model. The metabolic changes during healing could be described with six and seven distinct metabolic trajectories for DPT and FT wounds, respectively. Arginine and histidine metabolism were the most affected metabolic pathways during healing, irrespective of burn depth. Metabolic proxies for oxidative stress were different in the wound types, reaching maximum levels at day 14 in DPT burns but at day 7 in FT burns. We examined how acellular fish skin graft (AFSG) influences the wound metabolome compared to other standard-or-care burn wound treatments. We identified changes in metabolites within the methionine salvage pathway, specifically in DPT burn wounds that is novel to the understanding of the wound healing process. Furthermore, we found that AFSGs boost glutamate and adenosine in wounds that is of relevance given the importance of purinergic signaling in regulating oxidative stress and wound healing. Collectively, these results serve to define biomarkers of burn wound healing. These results conclusively contribute to the understanding of the multifactorial mechanism of the action of AFSG that has traditionally been attributed to its structural properties and omega-3 fatty acid content.

Relationship of Serum Vitamin D Levels With Diabetic Foot in Patients With Type 2 Diabetes Mellitus: A Cross-Sectional Study

Background and aims: Diabetic foot is one of the most severe complications in patients with diabetes mellitus and has been linked to 25-OH-vitamin D status. This study aims to determine the prevalence of 25-OH-vitamin D deficiency and its association with diabetic foot. Methods: Patients with type 2 diabetes mellitus were enrolled in this study. The patients were divided into the diabetic foot group (n = 95) and the non-diabetic foot group (n = 388). Weight, height, and waist circumference were measured. The 25-OH-vitamin D and the other biochemical tests were extracted from the electronic medical records. The difference in clinical parameters between the diabetic foot group and the non-diabetic foot group was analyzed, and the risk factors of the diabetic foot group were analyzed using logistic regression. Results: The prevalence of 25-OH-vitamin D deficiency was 44.6%, accounting for 57.9% of all the diabetic foot group patients and only 41.0% of the non-diabetic foot group patients. The mean serum 25-OH-vitamin D level was significantly different between the diabetic foot group and the non-diabetic foot group (19.8 ± 9.5 vs 24.1 ± 11.8; P = .011). Serum 25-OH-vitamin D and B12 were found to have a significant positive correlation (r = 0.410, P = <.01). The 25-OH-vitamin D level and body mass index were independently associated with diabetic foot (P = .043, OR = 1.21; P = .009, OR =  1.47), respectively. Conclusions: The 25-OH-vitamin D deficiency was higher in the diabetic foot group. More research is needed to understand the role of 25-OH-vitamin D in the development of diabetic foot.

The Role of Nutrients and Diet Characteristics in the Management of Diabetic Foot Ulcers: A Systematic Review

Diabetic foot ulcers (DFUs) are common complications of diabetes mellitus that affect patients' quality of life and pose a burden on the healthcare system. Although malnutrition and specific nutritional deficiencies can seriously impact wound healing in patients with chronic nonhealing wounds, the role of nutrition in the prevention and management of DFUs is still not clear. This review discusses the significance of frequent diet assessment and nutritional education of patients with DFUs with individualized correction of deficiencies and emphasis on adequate protein intake along with correction of vitamins D, C, E, and selenium status. Future research should clarify the impact of nutritional interventions, potentially involving the use of probiotics, zinc, and omega-3 fatty acids, and successfully translating the findings into practical guidelines for use in everyday clinical practice.

Vitamin B12 and Diabetic Foot: Α Mini-Review

This narrative mini-review article aimed to investigate the potential association of vitamin B12 levels with diabetic neuropathy (DN) and diabetic foot ulcers (DFUs). It was demonstrated that B12 deficiency seems to be related to DFUs in cases of metformin administration and bariatric surgery. B12 supplementation with dietary measures and agents may improve DN and quality of life (QoL). However, data are still preliminary and more experience is needed.

The severity and clinical characteristics of COVID-19 among patients with type 2 diabetes mellitus in Jazan, Saudi Arabia

BACKGROUND

The objectives of the current study were to assess the severity and clinical characteristics of coronavirus disease 2019 (COVID-19) among Saudi adults with type 2 diabetes mellitus (T2DM) in Jazan region, Saudi Arabia.

METHODS

This retrospective cohort study included 412 patients with COVID-19 selected randomly from the Health Electronic Surveillance Network system, which contains the primary data on COVID-19 infections in Jazan.

RESULTS

COVID-19 disease duration was significantly longer in patients with T2DM (mean = 10.7 days) compared with those without T2DM (mean = 8.3 days) (P = .01). Six (7%) patients experienced an increase in blood glucose concentrations and had to escalate their total daily insulin dose accordingly. Median fasting and random blood glucose levels increased after infection with COVID-19 (pre-COVID median = 119 and 172 mg/dL, respectively; post-COVID median = 148 and 216 mg/dL, respectively) (P = .02). The total insulin dose pre-COVID (median = 42 units/d) increased after infection with COVID-19 (median = 58 units/d) (P = .01). Most patients with T2DM had clinical COVID-19 symptoms (91%) and the remainder (9%) were asymptomatic. A large proportion (80%) of T2DM patients with mild COVID-19 symptoms self-isolated at home. COVID-19 patients with T2DM (11%) who had an oxygen saturation of ≤ 90% and admitted to the intensive care unit were higher than those without T2DM (5%) (P =  < .001). COVID-19 patients with T2DM (9%) had higher mortality rate than COVID-19 patients without T2DM (1%) (P =  < .001).

CONCLUSION

COVID-19 patients with T2DM were associated with a higher risk of admission to the intensive care unit and mortality than COVID-19 patients without T2DM.

Clinical characteristics and outcomes of post-COVID-19 pulmonary fibrosis: A case-control study

The development of pulmonary fibrosis is a rare complication of the novel coronavirus disease 2019 (COVID-19). Limited information is available in the literature about that, and the present study aimed to address this gap.This case-control study included 64 patients with post-COVID-19 pulmonary fibrosis who were hospitalized for COVID-19.The percentage of patients aged ≥65 years (44%) who demised was higher than those who survived (25%). Male patients (62%) had higher mortality than female patients (37%). The most frequently reported clinical symptoms were shortness of breath (98%), cough (91%), and fever (70%). Most COVID-19 patients with pulmonary fibrosis (81%) were admitted to an intensive care unit (ICU), and 63% required mechanical ventilation. Bilateral lung infiltrates (94%), "ground glass" opacity (91%), "honeycomb" lung (25%), and pulmonary consolidation (9%) were commonly identified in COVID-19 patients with pulmonary fibrosis who survived. The findings for computed tomography and dyspnea scale were significantly higher in severe cases admitted to the ICU who required mechanical ventilation. A higher computerized tomography score also correlated significantly with a longer duration of stay in hospital and a higher degree of dyspnea. Half of the COVID-19 patients with pulmonary fibrosis (50%) who survived required oxygen therapy, and those with "honeycomb" lung required long-term oxygen therapy to a far greater extent than others. Cox regression revealed that smoking and asthma were significantly associated with ICU admission and the risk of mortality.Post-COVID-19 pulmonary fibrosis is a severe complication that leads to permanent lung damage or death.

RJX Improves Wound Healing in Diabetic Rats

BACKGROUND

We recently reported the clinical safety profile of RJX, a well-defined intravenous GMP-grade pharmaceutical formulation of anti-oxidant and anti-inflammatory vitamins as active ingredients, in a Phase 1 study in healthy volunteers (ClinicalTrials.gov Identifier: NCT03680105) (Uckun et al., Front. Pharmacol. 11, 594321. 10.3389/fphar.2020.594321). The primary objective of the present study was to examine the effects of GMP-grade RJX on wound and burn injury healing in diabetic rats.

METHODS

In the present study, a rat model of T2DM was used that employs HFD in combination with a single injection of STZ intraperitoneally (i.p) at a moderate dose level (45 mg/kg). Anesthetized diabetic rats underwent full-thickness skin excision on the back or were subjected to burn injury via a heated brass probe and then started on treatments with normal saline (NS = vehicle) or RJX administered via intraperitoneal injections for three weeks.

FINDINGS

Notably, diabetic rats treated with the 1.25 mL/kg or 2.5 mL/kg RJX (DM+RJX groups) rapidly healed their wounds as fast as non-diabetic control rats. Inflammatory cell infiltration in the dermis along with fibrin and cell debris on the epithelial layer persisted for up to 14 days in the DM+NS group but not in RJX-treated groups. The histopathological score of wound healing on days 7 and 14 was better in diabetic rats treated with RJX than diabetic rats treated with NS and comparable to the scores for non-diabetic healthy rats consistent with an accelerated healing process. The residual wound area of RJX-treated rats was significantly smaller than that of NS-treated diabetic rats at each evaluation time point (P<0.001). The accelerating effect of RJX on diabetic wound healing was dose-dependent. We obtained similar results in the burn injury model. Our results demonstrate that RJX - at a dose level >10-fold lower than its clinical maximum tolerated dose (MTD) - accelerates the healing of excision wounds as well burn injury in diabetic rats.

Clinical characteristics and ABO blood groups in COVID-19 patients, Saudi Arabia

This study assessed the proportion of ABO blood groups and clinical characteristics among Saudi patients with coronavirus disease 2019 (COVID-19) in Jazan, Saudi Arabia.This retrospective cohort study included 404 Saudi adults with COVID-19, confirmed by the real-time reverse transcription-polymerase chain reaction. The participants were selected randomly between July 1, 2020, and July 31, 2020, from the Health Electronic Surveillance Network system, which contains the primary data on COVID-19 infections in Jazan.Blood type O (62.4%) represented the highest proportion in COVID-19 Saudi patients followed by the other blood groups which distributed as follows: blood type A (25.5%), blood type B (10.1%), and blood type AB (2%). Men, and people aged 18-44 years, represented the higher percentage than women and those of a younger age. The majority of the patients with COVID-19 had clinical symptoms (88.4%), and the remainder (11.6%) were asymptomatic. Ninety four percent of the patients had mild COVID-19 symptoms and self-isolated at home. Only 6.4% of the cases were severe and admitted to hospital. There was no significant association between a specific ABO blood group and COVID-19 clinical symptoms (P = .950), incubation period (P = .780), disease duration (P = .430), and disease severity (P = .340). Old age and diabetes were the significant predictors of COVID-19 severity and hospital admission (P = .010).Blood group O represented the highest proportion of COVID-19 Saudi patients as it is the most common blood group in Saudi individuals in Jazan. However, no specific blood group was associated with COVID-19 severity and hospital admission. Old age and diabetes mellitus were shown to be significant predictors of severe COVID-19 and hospital admission.

Associations between Nutrients and Foot Ulceration in Diabetes: A Systematic Review

We reviewed the literature to evaluate potential associations between vitamins, nutrients, nutritional status or nutritional interventions and presence or healing of foot ulceration in diabetes. Embase, Medline, PubMed, and the Cochrane Library were searched for studies published prior to September 2020. We assessed eligible studies for the association between nutritional status or interventions and foot ulcers. Fifteen studies met the inclusion criteria and were included in this review. Overall, there is a correlation between poor nutritional status and the presence of foot ulceration or a delay in healing. However, there is not enough data to reach conclusions about whether the relationships are causal or only association. Further research is required to test whether any forms of nutritional supplementation improve foot ulcer healing.

Epidemiological and Clinical Characteristics of Deceased COVID-19 Patients

Objective

Fatalities due to coronavirus disease 2019 (COVID-19) continue to increase, and information on the epidemiological and clinical characteristics of deceased patients who were hospitalized with COVID-19 is limited in the Arab region. The current study aimed to address this gap.

Methods

Three hundred and four Saudi patients in Jazan Region, Saudi Arabia, who died after being hospitalized with COVID-19 between July 1, 2020, and December 31, 2020, were analyzed in this retrospective cohort study.

Results

A greater proportion of male patients (59%), compared to female patients (41%), died due to COVID-19. Just over half (55%) of the deaths due to COVID-19 affected patients aged ≥65 years. More than two-thirds of the deceased COVID-19 patients had diabetes (70%) and hypertension (69%); other comorbidities were obesity (30%), heart disease (30%), and chronic kidney disease (14%). Dyspnea (91%), cough (80%), and fever (70%) were the most frequently reported clinical symptoms. Eighty-five per cent of COVID-19 deaths occurred in patients admitted to the intensive care unit (ICU), and 90% of the patients required mechanical ventilation. Typically, lymphopenia, and neutrophilia were observed on admission and 24 hours prior to death. Creatinine and serum ferritin levels and erythrocyte sedimentation rate and D-dimer plasma levels increased significantly following infection with COVID-19. Lung infiltrates and pulmonary opacity (83%) were the most common findings on chest X-ray. Respiratory failure (70%) and acute respiratory distress syndrome (52%) were the leading complications to death. Logistic and Cox regression revealed that a higher age, smoking, high creatinine and aspartate transaminase levels, and respiratory failure were significantly associated with the risk of mortality during the early stay in hospitals.

Conclusion

The proportion of comorbidities was high in deceased patients who were hospitalized with COVID-19 in Jazan region, Saudi Arabia. A higher age, smoking, and respiratory failure were significant predictors of mortality during the early stay in hospitals.

Co-morbidity and blood group type risk in coronavirus disease 2019 patients: A case-control study

Objective

The objective of the study was to assess mortality risk associated with co-morbidities and blood group type in coronavirus disease 2019 (COVID-19) patients in Jazan, Saudi Arabia.

Methods

This case–control study enrolled 323 Saudi adults with COVID-19, confirmed by real-time reverse transcription–polymerase chain reaction. The participants were selected randomly between August 31, 2020, and July 1, 2020, from the Health Electronic Surveillance Network system, which contains the primary data on COVID-19 infections in Jazan, Saudi Arabia. The sample included 108 patients who died due to COVID-19 disease and 215 controls who recovered from it (1:2 ratio). The chi-square test, independent samples t-test, and logistic regression were used to perform the statistical analysis.

Results

Mortality was higher in older age patients with COVID-19 (mean = 65.4 years, standard deviation [SD] = 15.6) compared to recovered patients (mean = 39.5 years, SD = 14.8) (p < 0.001) with a moderate effect size (eta squared = 0.06). Diabetes mellitus (odds ratio [OR] = 9.4), hypertension (OR = 8.6), cardiovascular disease (OR = 7.4), chronic kidney disease (OR = 3.3), and obesity (OR = 2.0) were significantly associated with death due to COVID-19. Using logistic regression analysis, older age and diabetes mellitus were the primary independent predictors of COVID-19 mortality. However, there was no significant association between a specific ABO blood group and mortality risk (P = 0.07).

Conclusion

Older age and the presence of co-morbidities, especially diabetes mellitus, increased the risk of death in patients with COVID-19. Establishing the causality of death in patients with COVID-19 should be a key aim of future studies.

Diabetes-Related Distress and Depression in Saudis with Type 2 Diabetes

Objective

This study aims to assess the prevalence of diabetes mellitus (DM)-related distress and depression and their associated factors in Saudi people with type 2 DM (T2DM) in Jazan, Saudi Arabia. It also aims to assess the association between glycemic control and DM-related distress and depression.

Methods

This is an analytical, cross-sectional study which recruited 300 Saudi patients with T2DM randomly from primary healthcare centers in Jazan, Saudi Arabia. DM-related distress and depression were measured by valid questionnaires, the 17-item Diabetes Distress Scale and the Patient Health Questionnaire-9, respectively. Logistic regression and an independent t-test were performed in the statistical analysis.

Results

The mean age of the study population was 52.7 years, with a range of 23–83 years. The number of males was 147 (49%) and females was 153 (51%) in the study population. The prevalence of DM-related distress and depression in Saudi patients with T2DM in Jazan was 22.3% and 20%, respectively, and about 7.7% had both. Of DM-related distress, 12.3% had interpersonal-related DM distress, 11.7% had physician-related DM distress, 10.7% had emotional-related DM distress, and 7% had regimen-related DM distress. After adjusting for covariates, being female, patients aged <45, physical inactivity, DM duration <5 years, and smoking were significantly associated with DM-related distress and depression. There was also a significant association between DM-related distress and depression, OR = 3 [95% CI: 1.8, 6.4]. Furthermore, we found that glycated hemoglobin (A1C) levels were significantly higher in those with DM-related distress (small effect size, eta squared = 0.04) and depression (moderate effect size, eta squared = 0.06) (P < 0.001).

Conclusion

DM-related distress and depression are prevalent in patients with T2DM in Jazan, Saudi Arabia. Both these conditions need to be screened for and addressed in clinical settings. Establishing the causality of DM-related distress and depression in T2DM is an important aim for any future studies.