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Huang J, Tiu AC, Jose PA, Yang J. Sorting nexins: role in the regulation of blood pressure. FEBS J 2023; 290:600-619. [PMID: 34847291 PMCID: PMC9149145 DOI: 10.1111/febs.16305] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 10/13/2021] [Accepted: 11/29/2021] [Indexed: 02/06/2023]
Abstract
Sorting nexins (SNXs) are a family of proteins that regulate cellular cargo sorting and trafficking, maintain intracellular protein homeostasis, and participate in intracellular signaling. SNXs are also important in the regulation of blood pressure via several mechanisms. Aberrant expression and dysfunction of SNXs participate in the dysregulation of blood pressure. Genetic studies show a correlation between SNX gene variants and the response to antihypertensive drugs. In this review, we summarize the progress in SNX-mediated regulation of blood pressure, discuss the potential role of SNXs in the pathophysiology and treatment of hypertension, and propose novel strategies for the medical therapy of hypertension.
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Affiliation(s)
- Juan Huang
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing 410020, P.R. China
| | - Andrew C. Tiu
- Department of Medicine, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, USA
| | - Pedro A. Jose
- Division of Renal Diseases & Hypertension, Department of Medicine, and Department of Physiology and Pharmacology, The George Washington University School of Medicine & Health Sciences, Washington, DC 20052, USA
| | - Jian Yang
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing 410020, P.R. China
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Tiu AC, Yang J, Asico LD, Konkalmatt P, Zheng X, Cuevas S, Wang X, Lee H, Mazhar M, Felder RA, Jose PA, Villar VAM. Lipid rafts are required for effective renal D 1 dopamine receptor function. FASEB J 2020; 34:6999-7017. [PMID: 32259353 DOI: 10.1096/fj.201902710rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 03/05/2020] [Accepted: 03/17/2020] [Indexed: 12/13/2022]
Abstract
Effective receptor signaling is anchored on the preferential localization of the receptor in lipid rafts, which are plasma membrane platforms replete with cholesterol and sphingolipids. We hypothesized that the dopamine D1 receptor (D1 R) contains structural features that allow it to reside in lipid rafts for its activity. Mutation of C347 palmitoylation site and Y218 of a newly identified Cholesterol Recognition Amino Acid Consensus motif resulted in the exclusion of D1 R from lipid rafts, blunted cAMP response, impaired sodium transport, and increased oxidative stress in renal proximal tubule cells (RPTCs). Kidney-restricted silencing of Drd1 in C57BL/6J mice increased blood pressure (BP) that was normalized by renal tubule-restricted rescue with D1 R-wild-type but not the mutant D1 R 347A that lacks a palmitoylation site. Kidney-restricted disruption of lipid rafts by β-MCD jettisoned the D1 R from the brush border, decreased sodium excretion, and increased oxidative stress and BP in C57BL/6J mice. Deletion of the PX domain of the novel D1 R-binding partner sorting nexin 19 (SNX19) resulted in D1 R partitioning solely to non-raft domains, while silencing of SNX19 impaired D1 R function in RPTCs. Kidney-restricted silencing of Snx19 resulted in hypertension in C57BL/6J mice. Our results highlight the essential role of lipid rafts for effective D1 R signaling.
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Affiliation(s)
- Andrew C Tiu
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA.,Department of Medicine, Einstein Medical Center, Philadelphia, PA, USA
| | - Jian Yang
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, P.R. China
| | - Laureano D Asico
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Prasad Konkalmatt
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Xiaoxu Zheng
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Santiago Cuevas
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Xiaoyan Wang
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Hewang Lee
- Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, USA
| | - Momina Mazhar
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Robin A Felder
- Department of Pathology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Pedro A Jose
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA.,Department of Pharmacology/Physiology, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Van Anthony M Villar
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
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Villar VAM, Asico LD, Wang X, Konkalmatt P, Yang J, Gomes J, Rozyyev S, Tiu AC, Cuevas S, Armando I, Jose PA. Salt Sensing and Salt Response of Renal Neuropeptide FF Receptor 2. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.569.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Jian Yang
- Clinical NutritionThe Third Affiliated Hospital of Chongqing Medical UniversityChongqingPeople's Republic of China
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Rozyyev S, Crusan AP, Tiu AC, Jurgens JA, Quion JMB, Asico LD, Felder RA, Jose PA, Villar VAM. Tandem Requirement for Renal D
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R and D
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R Functionality. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.862.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Selim Rozyyev
- MedicineThe George Washington UniversityWashingtonDC
| | | | - Andrew C Tiu
- MedicineThe George Washington UniversityWashingtonDC
| | | | | | | | | | - Pedro A Jose
- MedicineThe George Washington UniversityWashingtonDC
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Tiu AC, Potdar R, Djibo DA, Masab M, Dourado C. Clinical outcomes of African American patients with advanced or metastatic non-small cell lung cancer on Nivolumab in a single community-based cancer center. Med Oncol 2018; 35:109. [PMID: 29915891 DOI: 10.1007/s12032-018-1171-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 05/28/2018] [Accepted: 06/13/2018] [Indexed: 12/19/2022]
Abstract
African Americans (AA) have the highest incidence and mortality rates with lung cancer. They are diagnosed at an earlier age with more advanced disease. Programmed cell death protein-1 inhibitor, Nivolumab, was approved as a second-line agent after failure of platinum-based therapy for advanced or metastatic non-small cell lung cancer (NSCLC). The original studies leading to the approval of Nivolumab had insufficient AA patients, thus there is still inadequate knowledge on treatment outcomes among AA patients. Our primary study endpoints were to determine the median overall survival, 1-year overall survival rate, median progression-free survival, and 1-year progression-free survival rate of patients with advanced or metastatic non-small cell lung cancer on Nivolumab. Our secondary study endpoints were to determine the overall tumor response rate, median time to response, median duration of response, and incidence of treatment-related adverse events of grade 3 or 4. In this retrospective study, we reviewed the charts of 38 patients, 29 of which were AA, with advanced or metastatic NSCLC who received Nivolumab from March 1, 2015 until November 30, 2017 from a single community-based cancer center and compared our results with historical data. Adenocarcinoma was the most common histology (71%) among all patients. Seven (18%) continued to use Nivolumab while 21 (55%) discontinued the treatment mainly due to progression of the disease. The median overall survival was 21.4 months (95% CI 13.5-27.4) and 17.6 months (95% CI 11.5-27.6) for all the patients and AA, respectively. Both have statistically significant difference (P < 0.001) compared to the historical studies of Borghaei et al. and Brahmer et al. At 1 year, the overall survival rate was 73% (95% CI 50-86) and 66% (95% CI 40-82) for all patients and AA, respectively. The median progression-free survival was also statistically significant (P < 0.001) between all the patients 6.3 months (95% CI 2.8-8), AA 6.0 months (95% CI 2.3-8.0), and the said historical studies. The 1-year progression-free survival rate was 23% (95% CI 10-39) and 28% (95% CI 12-47) for all patients and AA, respectively. Overall tumor response rate which includes complete and partial responses was 21% (95% CI 10-37) and 24% (95% CI 10-43) for all patients and AA, respectively. The median time to response was 3 and 2.8 months for all patients and AA, respectively. The median duration of response was 3.8 and 4.0 months for all patients and AA, respectively. Treatment-related adverse events of grade 3 or 4 were reported in 8 and 10% in all patients and AA, respectively, similar to the rates previously shown. AA patients with advanced or metastatic NSCLC on Nivolumab had increased overall survival and progression-free survival with similar grade 3 or 4 treatment-related adverse events. Providing adequate access to immunotherapy is indispensable to maximize survival benefit for AA patients.
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Affiliation(s)
- Andrew C Tiu
- Department of Medicine, Einstein Medical Center, 5501 Old York Road, Philadelphia, PA, 19141, USA.
| | - Rashmika Potdar
- Division of Hematology and Medical Oncology, Einstein Medical Center, Philadelphia, PA, USA
| | - Djeneba Audrey Djibo
- Department of Medicine, Einstein Medical Center, 5501 Old York Road, Philadelphia, PA, 19141, USA
| | - Muhammad Masab
- Department of Medicine, Einstein Medical Center, 5501 Old York Road, Philadelphia, PA, 19141, USA
| | - Claudia Dourado
- Division of Hematology and Medical Oncology, Einstein Medical Center, Philadelphia, PA, USA
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Abstract
The rising prevalence of primary pediatric hypertension and its tracking into adult hypertension point to the importance of determining its pathogenesis to gain insights into its current and emerging management. Considering that the intricate control of BP is governed by a myriad of anatomical, molecular biological, biochemical, and physiological systems, multiple genes are likely to influence an individual's BP and susceptibility to develop hypertension. The long-term regulation of BP rests on renal and non-renal mechanisms. One renal mechanism relates to sodium transport. The impaired renal sodium handling in primary hypertension and salt sensitivity may be caused by aberrant counter-regulatory natriuretic and anti-natriuretic pathways. The sympathetic nervous and renin-angiotensin-aldosterone systems are examples of antinatriuretic pathways. An important counter-regulatory natriuretic pathway is afforded by the renal autocrine/paracrine dopamine system, aberrations of which are involved in the pathogenesis of hypertension, including that associated with obesity. We present updates on the complex interactions of these two systems with dietary salt intake in relation to obesity, insulin resistance, inflammation, and oxidative stress. We review how insults during pregnancy such as maternal and paternal malnutrition, glucocorticoid exposure, infection, placental insufficiency, and treatments during the neonatal period have long-lasting effects in the regulation of renal function and BP. Moreover, these effects have sex differences. There is a need for early diagnosis, frequent monitoring, and timely management due to increasing evidence of premature target organ damage. Large controlled studies are needed to evaluate the long-term consequences of the treatment of elevated BP during childhood, especially to establish the validity of the current definition and treatment of pediatric hypertension.
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Affiliation(s)
- Andrew C Tiu
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine and Health Sciences, 2300 I Street, N.W. Washington, DC, 20037, USA.
| | - Michael D Bishop
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine and Health Sciences, 2300 I Street, N.W. Washington, DC, 20037, USA
| | - Laureano D Asico
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine and Health Sciences, 2300 I Street, N.W. Washington, DC, 20037, USA
| | - Pedro A Jose
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine and Health Sciences, 2300 I Street, N.W. Washington, DC, 20037, USA
| | - Van Anthony M Villar
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine and Health Sciences, 2300 I Street, N.W. Washington, DC, 20037, USA
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Tiu AC, Arguello-Guerra V, Varadi G. Right orbital edema masquerading a hematologic malignancy. SAGE Open Med Case Rep 2018; 6:2050313X17751838. [PMID: 29372057 PMCID: PMC5768267 DOI: 10.1177/2050313x17751838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 09/09/2017] [Accepted: 12/12/2017] [Indexed: 01/10/2023] Open
Abstract
Introduction: Multiple myeloma is caused by abnormal proliferation of plasma cells that affects more commonly African Americans. It classically presents with hypercalcemia, renal failure, anemia, and lytic bone lesions. The aim of this article is to present an unusual case of a 63-year-old African-American female with multiple myeloma who presented with worsening right-sided eye swelling for the past 3 weeks and to briefly review ophthalmologic manifestations of multiple myeloma. Case description: Our patient’s presentation was associated with a throbbing frontal headache, nasal congestion, malaise, and weight loss. Differential diagnosis on admission included giant cell arteritis, conjunctivitis, preseptal cellulitis, glaucoma, acute sinusitis, or cavernous sinus thrombosis. Extensive ophthalmologic evaluation did not show any intraocular abnormality. However, a magnetic resonance imaging of the brain showed hyperintense foci in the right frontal calvarium leading to the eye swelling. Further evaluation revealed pancytopenia, elevated protein levels, and inverse albumin–globulin ratio suggestive of a plasma cell dyscrasia. A skeletal survey revealed multiple osteolytic lesions. Serum and urine protein electrophoresis revealed elevated immunoglobulin G Kappa monoclonal gammopathy. Bone marrow biopsy demonstrated a hypercellular marrow comprised at least 70% mature appearing plasma cells staining positive for CD138. Chemotherapy with cyclophosphamide, bortezomib, and dexamethasone was initiated. After 2 months of chemotherapy, orbital swelling has resolved with decrease in M-spike, immunoglobulin G, and serum kappa light chains. Conclusion: This case illustrates an unusual presentation of multiple myeloma which was eye swelling caused by bony infiltration in the calvarium. Although hematologic malignancies tend to have more specific signs and symptoms, they should be included in the differentials of unilateral orbital edema.
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Affiliation(s)
- Andrew C Tiu
- Department of Medicine, Einstein Medical Center, Philadelphia, PA, USA
| | | | - Gabor Varadi
- Division of Hematology/Oncology, Einstein Medical Center, Philadelphia, PA, USA
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Ybañez-Morano J, Tiu AC. Synchronous single-port access laparoscopic right hemicolectomy and laparoscopic-assisted vaginal hysterectomy with bilateral salpingo-oophorectomy. J Surg Case Rep 2017; 2017:rjw236. [PMID: 28096321 PMCID: PMC5241908 DOI: 10.1093/jscr/rjw236] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Laparoscopic surgery through a single incision is gaining popularity with different stakeholders. The advantages of improved cosmetics, decreased postoperative pain and blood loss continue to attract patients from different surgical fields. Multidisciplinary approach to different surgical entities through a single incision has just been introduced. We report the first case of a synchronous single-port access (SPA) laparoscopic right hemicolectomy and laparoscopic-assisted vaginal hysterectomy with bilateral salpingo-oophorectomy through a single incision above the umbilicus in a 48-year-old female with ascending colon mass and uterine mass with good postoperative outcomes. SPA laparoscopic surgery is feasible for multidisciplinary approach in resectable tumors.
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Affiliation(s)
- Jessica Ybañez-Morano
- Department of Obstetrics and Gynecology, Ohio Valley Medical Center - Valley Professional Center, Wheeling, WV 26003, USA
| | - Andrew C Tiu
- Department of Obstetrics and Gynecology, Ohio Valley Medical Center - Valley Professional Center, Wheeling, WV 26003, USA
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