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Upadrasta G, Affinati A, Kumar S, Zelada H, Fulkerson C, Gupta S, Pollack T, Andrei AC, Oakes DJ, Schmidt K, Therasse A, Grady K, Pham D, Wilcox J, Levitsky J, Parikh N, Ladner D, Aleppo G, Molitch ME, Wallia A. Peak insulin drip rate associated with decreased infections post-solid organ transplant. Clin Transplant 2024; 38:e15239. [PMID: 38289889 DOI: 10.1111/ctr.15239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 10/30/2023] [Accepted: 12/30/2023] [Indexed: 02/01/2024]
Abstract
Infection and rejection outcomes were retrospectively analyzed in patients following liver transplant and separately following heart transplant with patients being stratified by their severity of immediate postoperative insulin resistance as measured by the peak insulin drip rate that was required to reduce glucose levels. For each group, these peak insulin drip rates were divided into quartiles (Q). In liver transplant patients (n = 207), those in Q4 (highest infusion rate) had significantly fewer infections up to 6 months post-transplant (42.3% vs. 60.0%, p = .036) and borderline fewer rejection episodes (25.0% vs. 40.0%, p = .066) compared to Q1-Q3 patients. To confirm these unexpected results, a subsequent similar analysis in heart transplant (n = 188) patients again showed that Q4 patients had significantly fewer infections up to 6 months (19.1% vs. 53.9%, p < .0001) compared to Q1-Q3 patients. Logistic regression in a subset of 103 cardiac transplant patients showed that the maximum glucose during surgery, prior MI, and hypertension were associated with severe insulin resistance (SIR) status, while the presence of pre-existing diabetes and BMI were not. We hypothesize that patients are who are able to mount a more robust counter-regulatory response that causes the insulin resistance may be healthier and thus able to mount a better response to infections.
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Affiliation(s)
- Gautham Upadrasta
- Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Alison Affinati
- Division of Metabolism, Endocrinology & Diabetes, University of Michigan, Ann Arbor, Michigan, USA
| | - Smita Kumar
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Henry Zelada
- Division of Endocrinology, Diabetes & Metabolism, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama, USA
| | - Candace Fulkerson
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Suruchi Gupta
- Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Adin-Cristian Andrei
- Department of Preventive Medicine, Division of Biostatistics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Diana Johnson Oakes
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Kathleen Schmidt
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Kathleen Grady
- Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Duc Pham
- Division of Cardiac Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Jane Wilcox
- Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Josh Levitsky
- Division of Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Neehar Parikh
- Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Daniela Ladner
- Division of Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Grazia Aleppo
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Mark E Molitch
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Amisha Wallia
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Zelada H, Perez-Guzman MC, Chernavvsky DR, Galindo RJ. Continuous glucose monitoring for inpatient diabetes management: an update on current evidence and practice. Endocr Connect 2023; 12:e230180. [PMID: 37578799 PMCID: PMC10563639 DOI: 10.1530/ec-23-0180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/14/2023] [Indexed: 08/15/2023]
Abstract
Over the last few years, several exciting changes in continuous glucose monitoring (CGM) technology have expanded its use and made CGM the standard of care for patients with type 1 and type 2 diabetes using insulin therapy. Consequently, hospitals started to notice increased use of these devices in their hospitalized patients. Furthermore during the coronavirus disease 2019 (COVID) pandemic, there was a critical need for innovative approaches to glycemic monitoring, and several hospitals started to implement CGM protocols in their daily practice. Subsequently, a plethora of studies have demonstrated the efficacy and safety of CGM use in the hospital, leading to clinical practice guideline recommendations. Several studies have also suggested that CGM has the potential to become the standard of care for some hospitalized patients, overcoming the limitations of current capillary glucose testing. Albeit, there is a need for more studies and particularly regulatory approval. In this review, we provide a historical overview of the evolution of glycemic monitoring in the hospital and review the current evidence, implementation protocols, and guidance for the use of CGM in hospitalized patients.
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Affiliation(s)
- Henry Zelada
- Division of Endocrinology, Diabetes and Metabolism, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | | | - Daniel R Chernavvsky
- Center for Diabetes Technology, University of Virginia, Charlottesville, Virginia, USA
| | - Rodolfo J Galindo
- Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine. Miami, Florida, USA
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Zelada H, Recklein CL, McGill JB. Short-term multifactorial intervention (STEMI): An approach using structured blood glucose monitoring (BGM) and conventional therapies in persons with diabetes. J Family Med Prim Care 2023; 12:1412-1416. [PMID: 37649768 PMCID: PMC10465056 DOI: 10.4103/jfmpc.jfmpc_2172_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 04/12/2023] [Accepted: 05/03/2023] [Indexed: 09/01/2023] Open
Abstract
Background Achieving glucose and glycosylated hemoglobin (HbA1c) targets have been shown to reduce long-term microvascular complications of diabetes; however, suboptimal glucose control is common. We tested whether glucose control could be improved within 8 weeks by employing structured blood glucose monitoring (BGM) qid in addition to seven times per day prior to visits for diabetes education and medication management that occurred every 2-4 weeks. Methods This single-center, prospective study was conducted on 78 adults with either type 1 diabetes (T1D) or type 2 diabetes (T2D), HbA1c >8%, and serum creatinine (sCr) <2.0 mg/dl. HbA1c was checked at baseline, Week 2, Week 4, and at Week 8. Patients were evaluated by a physician and a certified diabetes educator (CDE) at baseline, Week 2, and Week 4 for treatment adjustments and lifestyle advice based on a review of BGM done qid plus 7-point profiles conducted before Weeks 2, 4, and 8. Study outcomes were change in HbA1c from baseline to Week 8 and change in mean glucose on the 7-point profile from Week 2 to Week 8. These were compared using one-way repeated measures ANOVA. Results Of the 78 patients, 64.1% had T2D, 50% were women, and 72% were Caucasian. Mean age (±SD) was 51.3.5 ± 11.1 years, and median diabetes duration was 9 (5-17) years. The percentage of patients using insulin increased from 58.9% at baseline to 67.9% at Week 8. The mean (±SD) HbA1c was 9.53% (±1.71) at baseline, declined -1.38% from baseline to week 8 (CI -1.62 to -0.14, P < 0.001). The mean (±SD) glucose on the 7-point profile was 187 (±52) mg/dl at Week 2, and 157 (±5) mg/dl at Week 8. (P < 0.01). Conclusions An intensive glucose optimization program using structured BGM qid plus 7-point profiles, diabetes education, and conventional anti-diabetic therapies was successful in reducing HbA1c by 1.38% over 8 weeks in patients with poor glucose control.
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Affiliation(s)
- Henry Zelada
- Division of Endocrinology, Diabetes and Metabolism, University of Alabama at Birmingham Heersink School of Medicine, United States
| | - Carol L. Recklein
- Division of Endocrinology Metabolism and Lipid Research, Washington University School of Medicine in St Louis, United States
| | - Janet B. McGill
- Division of Endocrinology Metabolism and Lipid Research, Washington University School of Medicine in St Louis, United States
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Soundarrajan M, Zelada H, Fischer JV, Kopp P. ECTOPIC ADRENOCORTICOTROPIC HORMONE SYNDROME DUE TO METASTATIC PROSTATE CANCER WITH NEUROENDOCRINE DIFFERENTIATION. AACE Clin Case Rep 2020; 5:e192-e196. [PMID: 31967032 DOI: 10.4158/accr-2018-0429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/26/2018] [Indexed: 11/15/2022] Open
Abstract
Objective Neuroendocrine differentiation of prostate cancer can result in ectopic adrenocorticotropic hormone (ACTH) secretion (EAS) and Cushing syndrome. The aim of this report is to highlight this unusual mechanism of hypercortisolism and its management. Methods We report a 73-year-old patient with a history of prostate adenocarcinoma who presented with severe weakness, hyperglycemia, and hypokalemia caused by EAS. Results Diagnostic workup showed elevated 24-hour urine cortisol and ACTH levels consistent with EAS. Fluorodeoxyglucose positron emission tomography-computed tomography revealed a hypermetabolic mass in the prostate and metastatic lesions to the liver and bones. Liver biopsy was consistent with small cell carcinoma with positive immunostaining for ACTH. Pleural fluid analysis was consistent with high-grade neuroendocrine carcinoma. The patient underwent chemotherapy with carboplatin and etoposide. Hypercortisolism was treated with ketoconazole, metyrapone, mifepristone, and spironolactone. He suffered complications including opportunistic infections, deep venous thrombosis, and delirium. Given his poor prognosis and clinical decline, the patient opted for comfort measures only in a hospice facility. Conclusion Treatment-related neuroendocrine differentiation of prostate cancer is an emerging entity that may be associated with paraneoplastic syndromes including EAS.
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Zelada H, Recklein C, McGill J. SAT-146 Short-Term Optimization of Glucose Control Using Self-Monitored Blood Glucose and Standard Therapies. J Endocr Soc 2019. [PMCID: PMC6552040 DOI: 10.1210/js.2019-sat-146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND
Achieving diabetes control often takes months to years with intermittent clinic visits, infrequent changes in therapy and management by HbA1c levels. We conducted a study testing whether glucose control could be improved within 8 weeks by employing structured self-monitoring of blood glucose (SMBG), short-term follow-up with diabetes education and medication changes. METHODS
97 adults provided informed consent were screened and 78 completed the study. Participants had T1DM or T2DM, HbA1c ≥8%, and Cr <2.0 mg/dL. A CBC and sCr were done at the baseline visit, HbA1c at every visit. Patients were evaluated by a physician and CDE at each visit and treatment was adjusted to reach target blood glucose (90-120 mg/dl before meals, <180 mg/dl after meals) and to avoid hypoglycemia by one of the following methods: diabetes education, add or increase the dose of an oral anti-diabetic agent and add or change the dose of insulin according to standard treatment guidelines at baseline and weeks 2 and 4. Patients were provided with glucose meters and test strips, and were instructed to test 4x daily, complete a 7-point profile before visits 2, 4 and 8 and kept written glucose logs. . The mean HbA1c and mean glucose on the 7-point profile were compared using one-way repeated measure Analysis of Variance between baseline and subsequent visits
RESULTS
Of the 78 patients, 64.1% had T2DM, 50% were females and 72% were Caucasians. Mean age (±SD) was 51.3±11.1 years, the median (interquartile range) for diabetes duration was 9 (5-17) years and sCr was 0.85 (0.7-1.0) mg/dL. 53.9% had hypertension, 12.8% retinopathy, 17.9% neuropathy and 2.6% nephropathy. Anti-diabetes medications included metformin 39.7%, sulfonylureas 31.1%, thiazolidinediones 23.1%, insulin 58.9%, including 7.7% who used insulin pumps. The percentage of patients using insulin increased from 58.9% at baseline to 67.9% at week 8. The mean (±SD) HbA1C was 9.53% (1.71) at baseline, 9.10% (1.50) at week 2, 8.80% (1.37) at week 4 and 8.15% (1.19) at week 8, representing a decline of -0.39% from baseline to week 2 (CI -0.65 to -0.16, p<0.001); -0.33% (CI -0.56 to -0.09 p=0.002) from week 2 to week 4; -0.65% (CI -0.89 to -0.42 p<0.001) from week 4 to week 8 and -1.38% from baseline to week 8 (CI -1.62 to -0.14, p<0.001). The mean (±SD) glucose on the 7-point profile was 187.11 (52.60) mg/dL at week 2, 176.21 (48.96) mg/dL at week 4, 157.51 (5.73) mg/dL at week 8, it declining -26.02 mg/dL (CI -42.32 to 0.70, p=0.001) from week 2 to week 8. CONCLUSION
An intensive glucose optimization program conducted in patients with poorly controlled diabetes was successful in reducing HbA1c over 8 weeks. Increased SMBG, diabetes education and conventional medication adjustments were the key drivers. This structured optimization method improves glucose control safely and rapidly, and may be useful in pre-operative patients and those with limited access to more advanced diabetes therapies.
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Affiliation(s)
- Henry Zelada
- Washington University in St Louis, St Louis, MO, United States
| | - Carol Recklein
- Washington University in St Louis, St Louis, MO, United States
| | - Janet McGill
- Washington University in St. Louis, Saint Louis, MO, United States
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Zelada H, Huachin M, Villena J. Sigmoid Volvulus In Myxedema Megacolon. AACE Clin Case Rep 2017. [DOI: 10.4158/ep161241.cr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Zelada H, Carnero AM, Miranda-Hurtado C, Condezo-Aliaga D, Loza-Munarriz C, Aro-Guardia P, Manrique H. Beta-cell function and insulin resistance among Peruvian adolescents with type 2 diabetes. J Clin Transl Endocrinol 2016; 5:15-20. [PMID: 29067230 PMCID: PMC5644437 DOI: 10.1016/j.jcte.2016.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 10/31/2022] Open
Abstract
OBJECTIVE To characterize and compare the beta-cell function and insulin resistance among Peruvian adolescents with type 2 diabetes (T2D) and their non-diabetic, overweight and lean peers. METHODS Cross-sectional study of 54 adolescents aged 10-19 years, distributed in three sex- and age-matched groups (n = 18): (i) adolescents with T2D; (ii) overweight adolescents without T2D; and (iii) lean adolescents without T2D, at the Diabetes, Obesity and Nutrition Research Center in Lima, Peru. Fasting glucose, insulin, C-peptide, and glycated hemoglobin were measured for all participants. In addition, a two-hour oral glucose tolerance test (OGTT, 1.75 mg of glucose/kg body weight) was performed, during which glucose and C-peptide were quantified. The homeostasis model assessment of insulin resistance (HOMA-IR) and beta-cell function (HOMA-B) were derived for all participants, and beta-cell function was further examined by the area under the curve (AUC) of C-peptide. RESULTS The median HOMA-IR score was higher in adolescents with T2D compared to lean adolescents (6.1 vs. 2.1; p = 0.002), but was not different from that of overweight adolescents (6.1 vs. 4.0; p = 0.322). The median HOMA-B was higher in overweight adolescents than in lean adolescents (256.9 vs. 134.2; p = 0.015), and adolescents with T2D (256.9 vs. 119.8; p = 0.011). The mean AUC of glucose in adolescents with T2D was 1.8-fold higher than that of overweight adolescents, and 1.9-fold higher than that of lean adolescents (p < 0.001). Although the median AUC of C-peptide in adolescents with T2D was lower than that of overweight and lean adolescents, this difference was not statistically significant (230.7 vs. 336.6 vs. 267.3 nmol/l120 min, respectively; p = 0.215). CONCLUSION Among Peruvian adolescents with T2D, insulin resistance is the most prominent characteristic, rather than beta-cell dysfunction.
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Affiliation(s)
- Henry Zelada
- Internal Medicine Program, Louis A. Weiss Memorial Hospital, 4646 N Marine Dr, Chicago, IL 60640, USA
- School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
- School of Public Health and Administration, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Andres M. Carnero
- School of Public Health and Administration, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - César Miranda-Hurtado
- School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
- Anesthesiology Unit, Hospital Nacional Cayetano Heredia, Lima, Peru
| | | | - Cesar Loza-Munarriz
- Internal Medicine Program, Louis A. Weiss Memorial Hospital, 4646 N Marine Dr, Chicago, IL 60640, USA
- Anesthesiology Unit, Hospital Nacional Cayetano Heredia, Lima, Peru
- Nephrology Unit, Hospital Nacional Cayetano Heredia, Lima, Peru
| | - Pedro Aro-Guardia
- School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
- Diabetes, Obesity and Nutrition Research Center, Lima, Peru
| | - Helard Manrique
- Diabetes, Obesity and Nutrition Research Center, Lima, Peru
- Endocrinology Unit, Hospital Nacional Arzobispo Loayza, Lima, Peru
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Abstract
Type B insulin resistance (IR) is a rare autoimmune disease characterized by the presence of insulin receptor autoantibodies, resulting in a marked IR inducing hyperglycemia. Our first case is a 42-year-old female with a history of RA, SLE and Hashimoto-thyroiditis that presented with cachexia, acanthosis-nigricans, hirsutism, negative anti-insulin-ab and glucose level between 400 to 700 mg/dl, despite a total insulin dose of 1000 IU/day. She received pulses of cyclophosphamide along with prednisone. One year later the patient was off insulin and with HbA1c of 5.6%. The second case is a 42-year-old female patient that presented with polyuria, polydipsia, cachexia, acanthosis-nigricans, negative glutamic-acid-decarboxilase-ab and positive TPO-ab. She received IV infusion of regular insulin at a rate of 500 UI/d. Two years later she was off insulin with HbA1C of 5.6%. As summary, we reported a case of a disease remitted after receiving immunosuppressive therapy and a case of disease remitted spontaneously.
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Affiliation(s)
- Henry Zelada
- Internal Medicine Program, Louis A. Weiss Memorial Hospital, Chicago, Illinois; School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru.
| | - Dante Gamarra
- Endocrinology Unit, Hospital Nacional Dos de Mayo, Lima, Peru
| | - Hugo Arbañil
- Endocrinology Unit, Hospital Nacional Dos de Mayo, Lima, Peru
| | - Helard Manrique
- Endocrinology Unit, Hospital Nacional Arzobispo Loayza, Lima, Peru
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Zelada H, Bernabe-Ortiz A, Manrique H. Inhospital Mortality in Patients with Type 2 Diabetes Mellitus: A Prospective Cohort Study in Lima, Peru. J Diabetes Res 2015; 2016:7287215. [PMID: 26788522 PMCID: PMC4695674 DOI: 10.1155/2016/7287215] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/16/2015] [Indexed: 01/15/2023] Open
Abstract
Objective. To estimate cause of death and to identify factors associated with risk of inhospital mortality among patients with T2D. Methods. Prospective cohort study performed in a referral public hospital in Lima, Peru. The outcome was time until event, elapsed from hospital admission to discharge or death, and the exposure was the cause of hospital admission. Cox regression was used to evaluate associations of interest reporting Hazard Ratios (HR) and 95% confidence intervals. Results. 499 patients were enrolled. Main causes of death were exacerbation of chronic renal failure (38.1%), respiratory infections (35.7%), and stroke (16.7%). During hospital stay, 42 (8.4%) patients died. In multivariable models, respiratory infections (HR = 6.55, p < 0.001), stroke (HR = 7.05, p = 0.003), and acute renal failure (HR = 16.9, p = 0.001) increased the risk of death. In addition, having 2+ (HR = 7.75, p < 0.001) and 3+ (HR = 21.1, p < 0.001) conditions increased the risk of dying. Conclusion. Respiratory infections, stroke, and acute renal disease increased the risk of inhospital mortality among hospitalized patients with T2D. Infections are not the only cause of inhospital mortality. Certain causes of hospitalization require standardized and aggressive management to decrease mortality.
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Affiliation(s)
- Henry Zelada
- Internal Medicine Training Program, Louis A. Weiss Memorial Hospital, 4646 N. Marine Drive, Chicago, IL 60640, USA
- School of Public Health and Administration, Peruvian University Cayetano Heredia, Lima, Peru
- School of Medicine, Peruvian University Cayetano Heredia, Lima, Peru
| | - Antonio Bernabe-Ortiz
- School of Public Health and Administration, Peruvian University Cayetano Heredia, Lima, Peru
- Center of Excellence in Chronic Diseases (CRONICAS), Peruvian University Cayetano Heredia, Lima, Peru
- School of Medicine, Peruvian University of Applied Sciences, Lima, Peru
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Stein-Merlob AF, Kessinger CW, Erdem SS, Zelada H, Hilderbrand SA, Lin CP, Tearney GJ, Jaff MR, Reed GL, Henke PK, McCarthy JR, Jaffer FA. Blood Accessibility to Fibrin in Venous Thrombosis is Thrombus Age-Dependent and Predicts Fibrinolytic Efficacy: An In Vivo Fibrin Molecular Imaging Study. Am J Cancer Res 2015; 5:1317-27. [PMID: 26516370 PMCID: PMC4615735 DOI: 10.7150/thno.12494] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 08/07/2015] [Indexed: 11/13/2022] Open
Abstract
Fibrinolytic therapy of venous thromboembolism (VTE) is increasingly utilized, yet limited knowledge is available regarding in vivo mechanisms that govern fibrinolytic efficacy. In particular, it is unknown how age-dependent thrombus organization limits direct blood contact with fibrin, the target of blood-based fibrinolytic agents. Utilizing high-resolution in vivo optical molecular imaging with FTP11, a near-infrared fluorescence (NIRF) fibrin-specific reporter, here we investigated the in vivo interrelationships of blood accessibility to fibrin, thrombus age, thrombus neoendothelialization, and fibrinolysis in murine venous thrombosis (VT). In both stasis VT and non-stasis VT, NIRF microscopy showed that FTP11 fibrin binding was thrombus age-dependent. FTP11 localized to the luminal surface of early-stage VT, but only minimally to subacute VT (p<0.001). Transmission electron microscopy of early stage VT revealed direct blood cell contact with luminal fibrin-rich surfaces. In contrast, subacute VT exhibited an encasing CD31+ neoendothelial layer that limited blood cell contact with thrombus fibrin in both VT models. Next we developed a theranostic strategy to predict fibrinolytic efficacy based on the in vivo fibrin accessibility to blood NIRF signal. Mice with variably aged VT underwent FTP11 injection and intravital microscopy (IVM), followed by tissue plasminogen activator infusion to induce VT fibrinolysis. Fibrin molecular IVM revealed that early stage VT, but not subacute VT, bound FTP11 (p<0.05), and experienced higher rates of fibrinolysis and total fibrinolysis (p<0.05 vs. subacute VT). Before fibrinolysis, the baseline FTP11 NIRF signal predicted the net fibrinolysis at 60 minutes (p<0.001). Taken together, these data provide novel insights into the temporal evolution of VT and its susceptibility to therapeutic fibrinolysis. Fibrin molecular imaging may provide a theranostic strategy to identify venous thrombi amenable to fibrinolytic therapies.
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Castillo Angeles M, De la Cruz Luque C, Zelada H, Vilela-Sangay AR, Samalvides FS, Málaga G. Espondilitis tuberculosa en adultos: una serie de casos en un hospital de tercer nivel, Lima-Perú. Rev Peru Med Exp Salud Publica 2011. [DOI: 10.17843/rpmesp.2011.282.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Castillo-Angeles M, De la Cruz Luque C, Zelada H, Vilela-Sangay AR, Samalvides F, Málaga G. Espondilitis tuberculosa en adultos: revisión de una serie de casos en un hospital de tercer nivel, Lima-Perú. Rev Peru Med Exp Salud Publica 2011; 28:282-7. [DOI: 10.1590/s1726-46342011000200016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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