1
|
Differential Effect of Vaginal Microbiota on Spontaneous Preterm Birth among Chinese Pregnant Women. BIOMED RESEARCH INTERNATIONAL 2022; 2022:3536108. [PMID: 36506912 PMCID: PMC9731763 DOI: 10.1155/2022/3536108] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/25/2022] [Accepted: 11/03/2022] [Indexed: 12/02/2022]
Abstract
Objective The effect of vaginal microbiota on spontaneous preterm birth (sPTB) has not been fully addressed, and few studies have explored the associations between vaginal taxa and sPTB in the gestational diabetes mellitus (GDM) and non-GDM groups, respectively. Study Design. To minimize external interference, a total of 41 pregnant women with sPTB and 308 controls (pregnant women without sPTB) from same regain were enrolled in this case-cohort study. Controls were randomly selected at baseline. With the exception of GDM, other characteristics were not significantly different between the two groups. Vaginal swabs were collected at early second trimester. Using 16S amplicon sequencing, the main bioinformatics analysis was performed on the platform of QIIME 2. Vaginal microbiota traits of the sPTB group were compared with controls. Finally, the effects of binary taxa on sPTB in the GDM group and the non-GDM group were analyzed, respectively. Results The proportion of GDM in the sPTB (19.51%) was higher than the controls (7.47%, P = 0.018). The vaginal microbiota of pregnant women with sPTB exhibited higher alpha diversity metrics (observed features, P = 0.001; Faith's phylogenetic diversity, P = 0.013) and different beta diversity metrics (unweighted UniFrac, P = 0.006; Jaccard's distance, P = 0.004), compared with controls. The presence of Lactobacillus paragasseri/gasseri (aOR: 3.12, 95% CI: 1.24-7.84), Streptococcus (aOR: 3.58, 95% CI: 1.68-7.65), or Proteobacteria (aOR: 3.39, 95% CI: 1.55-7.39) was associated with an increased risk of sPTB in the non-GDM group (P < 0.05). However, the relative abundance of novel L. mulieris (a new species of the L. delbrueckii group) was associated with a decreased risk of sPTB (false discovery rate, 0.10) in all pregnant women. Conclusion GDM may modify the association of vaginal taxa with sPTB, suggesting that maternal GDM should be considered when using vaginal taxa to identify pregnant women at high risk of sPTB.
Collapse
|
2
|
Takahashi K, Mizukami H, Osonoi S, Takeuchi Y, Kudoh K, Sasaki T, Daimon M, Yagihashi S. Islet microangiopathy and augmented β-cell loss in Japanese non-obese type 2 diabetes patients who died of acute myocardial infarction. J Diabetes Investig 2021; 12:2149-2161. [PMID: 34032392 PMCID: PMC8668063 DOI: 10.1111/jdi.13601] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 11/30/2022] Open
Abstract
AIMS/INTRODUCTION Islets have microvessels that might develop pathological alterations similar to microangiopathy in type 2 diabetes patients. It remains unclear, however, whether the changes correlate with endocrine cell deficits or whether the presence of macroangiopathy influences the islet microvasculature in Japanese type 2 diabetes patients. In this study, we characterized changes of the islet microvessels and endocrine cells in Japanese non-obese patients with type 2 diabetes who died of acute myocardial infarction (AMI). MATERIALS AND METHODS Clinical profiles and islet pathology were examined for 35 diabetes patients who died of AMI (DM + AMI) and 13 diabetes patients who were free from AMI (DM). A total of 13 age-matched, individuals without diabetes who died of AMI and 16 individuals without diabetes who were free from AMI were also studied. Pancreata were subjected to morphometric evaluation of islets, including microvascular alterations of immunostained sections. RESULTS Body mass index in DM + AMI was comparable to those in DM. Compared with DM, DM + AMI showed greater glycated hemoglobin levels, higher prevalence of renal failure, hypertension, smaller β-cell volume density and greater amyloid area. DM + AMI showed an increased microvascular area and density compared with other groups. There was a significant increase in vascular basement membrane thickness and loss of pericytes in DM and DM + AMI compared with individuals without diabetes in each group, and the extent of thickening was correlated with the amyloid area and occurrence of β-cell loss in DM + AMI. CONCLUSIONS Islet microangiopathy was associated with augmented β-cell loss and amyloid deposition in non-obese Japanese type 2 diabetes patients who died of AMI.
Collapse
Affiliation(s)
- Kazuhisa Takahashi
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
- Department of Endocrinology and MetabolismHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Hiroki Mizukami
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Sho Osonoi
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
- Department of Endocrinology and MetabolismHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Yuki Takeuchi
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
- Department of Endocrinology and MetabolismHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Kazuhiro Kudoh
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Takanori Sasaki
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Makoto Daimon
- Department of Endocrinology and MetabolismHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| | - Soroku Yagihashi
- Department of Pathology and Molecular MedicineHirosaki University Graduate School of MedicineHirosaki, AomoriJapan
| |
Collapse
|
3
|
Samocha-Bonet D, Wu B, Ryugo DK. Diabetes mellitus and hearing loss: A review. Ageing Res Rev 2021; 71:101423. [PMID: 34384902 DOI: 10.1016/j.arr.2021.101423] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/26/2021] [Accepted: 08/05/2021] [Indexed: 12/17/2022]
Abstract
Diabetes (type 2) and sensorineural hearing loss are common health problems manifested with ageing. While both type 1 and type 2 diabetes have been associated with hearing loss, a causal link has been difficult to establish. Individuals with diabetes have twice the incidence of hearing loss compared to those without diabetes and those with prediabetes have a 30% higher rate of hearing loss. Whether hearing loss is associated with diabetes independent of glycemic control remains to be determined. Hearing loss has its own set of risk factors and shares others with diabetes. This review will summarize the complex relationship between diabetes and sensorineural hearing loss.
Collapse
Affiliation(s)
- Dorit Samocha-Bonet
- Garvan Institute of Medical Research, Darlinghurst, NSW, 2010, Australia; St Vincent's Clinical School, UNSW Sydney, Darlinghurst, NSW, 2010, Australia.
| | - Buffy Wu
- Garvan Institute of Medical Research, Darlinghurst, NSW, 2010, Australia; School of Medical Sciences, UNSW Sydney, Kensington, NSW, 2052, Australia
| | - David K Ryugo
- Garvan Institute of Medical Research, Darlinghurst, NSW, 2010, Australia; School of Medical Sciences, UNSW Sydney, Kensington, NSW, 2052, Australia; Department of Otolaryngology Head and Neck and Skull Base Surgery, St. Vincent's Hospital, Darlinghurst, NSW, 2010, Australia
| |
Collapse
|
4
|
Affiliation(s)
- Peter R Herse
- Department of Optometry, University of Auckland, New Zealand
| |
Collapse
|
5
|
Roy S, Kim D. Retinal capillary basement membrane thickening: Role in the pathogenesis of diabetic retinopathy. Prog Retin Eye Res 2020; 82:100903. [PMID: 32950677 DOI: 10.1016/j.preteyeres.2020.100903] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 09/08/2020] [Accepted: 09/15/2020] [Indexed: 02/07/2023]
Abstract
Vascular basement membrane (BM) thickening has been hailed over half a century as the most prominent histological lesion in diabetic microangiopathy, and represents an early ultrastructural change in diabetic retinopathy (DR). Although vascular complications of DR have been clinically well established, specific cellular and molecular mechanisms underlying dysfunction of small vessels are not well understood. In DR, small vessels develop insidiously as BM thickening occurs. Studies examining high resolution imaging data have established BM thickening as one of the foremost structural abnormalities of retinal capillaries. This fundamental structural change develops, at least in part, from excess accumulation of BM components. Although BM thickening is closely associated with the development of DR, its contributory role in the pathogenesis of DR is coming to light recently. DR develops over several years before clinical manifestations appear, and it is during this clinically silent period that hyperglycemia induces excess synthesis of BM components, contributes to vascular BM thickening, and promotes structural and functional lesions including cell death and vascular leakage in the diabetic retina. Studies using animal models show promising results in preventing BM thickening with subsequent beneficial effects. Several gene regulatory approaches are being developed to prevent excess synthesis of vascular BM components in an effort to reduce BM thickening. This review highlights current understanding of capillary BM thickening development, role of BM thickening in retinal vascular lesions, and strategies for preventing vascular BM thickening as a potential therapeutic strategy in alleviating characteristic lesions associated with DR.
Collapse
Affiliation(s)
- Sayon Roy
- Boston University School of Medicine, Boston, MA, USA.
| | - Dongjoon Kim
- Boston University School of Medicine, Boston, MA, USA
| |
Collapse
|
6
|
Hashemi-Soteh MB, Ahmadzadeh Amiri A, Sheikh Rezaee MR, Ahmadzadeh Amiri A, Olfat S, Ahmadzadeh Amiri A. Aldose reductase (AC)n gene polymorphism in Iranian patients with type 2 diabetic microangiopathy; a case-control study. Diabetol Int 2020; 12:101-107. [PMID: 33479585 DOI: 10.1007/s13340-020-00446-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/05/2020] [Indexed: 12/15/2022]
Abstract
Aim (AC)n promoter region of the aldose reductase (ALR) genes polymorphism has been associated with diabetic microvascular complications (MVCs). The aim of this study was to find the relationship between dinucleotide repeat (AC)n polymorphisms of the ALR gene and the occurrence of MVCs, such as diabetic retinopathy, neuropathy, and nephropathy in Iranian type 2 diabetic (T2D) patients. Methods This prospective case-control study was performed on T2D patients who were categorized into two groups based on the presence or absence of diabetic microangiopathy. All patients were provided informed consent. After extracting genomic DNA, the (AC)n of the ALR gene was determined using Polymerase chain reaction (PCR). Results Thirteen alleles of the (AC)n gene polymorphism were detected including Z + 16, Z + 14, Z + 8, Z + 6, Z + 4, Z + 2, Z, Z - 2, Z - 4, Z - 6, Z - 8, Z - 10, and Z - 12. The frequency of the Z - 4 allele was significantly higher in patients with retinopathy, nephropathy, and autonomic neuropathy compared with those with long-term uncomplicated diabetes (P < 0.001, P < 0.001, P = 0.031, respectively). After controlling for baseline risk factors, we found that the carrier of the Z - 4 allele of ALR (AC)n polymorphism had a higher risk of diabetic retinopathy and diabetic nephropathy (P < 0.001). The homozygosity for the Z - 4 allele was found to be associated with diabetic microangiopathy. Conclusion Our results showed that ALR (AC)n gene polymorphism in Iranian patients with type 2 diabetes independently, predispose retinal, renal and neural microvascular to diabetic complications.
Collapse
Affiliation(s)
| | | | - Majid Reza Sheikh Rezaee
- Department of Ophthalmology, Bu-Ali Sina Hospital, Mazandaran University of Medical Sciences, Sari, Iran
| | | | | | - Ahmad Ahmadzadeh Amiri
- Department of Ophthalmology, Bu-Ali Sina Hospital, Mazandaran University of Medical Sciences, Sari, Iran
| |
Collapse
|
7
|
Klandorf H, Probert I, Iqbal M. In the defence against hyperglycaemia: an avian strategy. WORLD POULTRY SCI J 2019. [DOI: 10.1079/wps19990019] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- H. Klandorf
- Division of Animal and Veterinary Sciences, West Virginia University, P.O. Box 6108, Morgantown, WV 26506-6108, USA
| | - I.L. Probert
- Division of Animal and Veterinary Sciences, West Virginia University, P.O. Box 6108, Morgantown, WV 26506-6108, USA
| | - M. Iqbal
- Division of Animal and Veterinary Sciences, West Virginia University, P.O. Box 6108, Morgantown, WV 26506-6108, USA
- Center of Excellence for Poultry, University of Arkansas, Fayetteville, AR 72701, USA
| |
Collapse
|
8
|
Julius A, Hopper W. A non-invasive, multi-target approach to treat diabetic retinopathy. Biomed Pharmacother 2018; 109:708-715. [PMID: 30551523 DOI: 10.1016/j.biopha.2018.10.185] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 10/26/2018] [Accepted: 10/31/2018] [Indexed: 12/13/2022] Open
Abstract
Hyperglycemia invoke number of pathways resulting in development of diabetic retinopathy (DR), including protein kinase C activation, increased expression of VEGF, advanced glycation end product (AGEs) formation and activation of polyol pathway, among which the pathophysiology of aldose reductase (ALR2) of the polyol pathway is evident by more than a decade of research. Subtle involvement of ALR2 in invoking various pathways of diabetic complications has caused an increase in attention towards the identification of novel aldose reductase inhibitors (ARIs). Numerous ARIs of different classes were employed in the treatment of diabetic complications initially, but few came into light as drugs. Though no ALR2 inhibitor has been used for the treatment or control of DR, Epalrestat has been used worldwide for treating diabetic neuropathy. This review critically analyses different treatments available for diabetic retinopathy, their limitations and the importance of the development of novel inhibitors of ALR2 that could prevent progression of DR, by causing a direct or indirect effect on controlling factors associated with DR.
Collapse
Affiliation(s)
- Angeline Julius
- Department of Biotechnology, School of Bioengineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Chennai 603 203, India
| | - Waheeta Hopper
- Department of Biotechnology, School of Bioengineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Chennai 603 203, India.
| |
Collapse
|
9
|
Ha TJ, Bo Song S, Ko J, Park CH, Ko JM, Choe ME, Kwak DY, Lee JH. Isolation and identification of α-glucosidase inhibitory constituents from the seeds of Vigna nakashimae: Enzyme kinetic study with active phytochemical. Food Chem 2018; 266:483-489. [DOI: 10.1016/j.foodchem.2018.06.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 05/27/2018] [Accepted: 06/08/2018] [Indexed: 11/25/2022]
|
10
|
Abstract
In diabetes mellitus, the polyol pathway is highly active and consumes approximately 30% glucose in the body. This pathway contains 2 reactions catalyzed by aldose reductase (AR) and sorbitol dehydrogenase, respectively. AR reduces glucose to sorbitol at the expense of NADPH, while sorbitol dehydrogenase converts sorbitol to fructose at the expense of NAD+, leading to NADH production. Consumption of NADPH, accumulation of sorbitol, and generation of fructose and NADH have all been implicated in the pathogenesis of diabetes and its complications. In this review, the roles of this pathway in NADH/NAD+ redox imbalance stress and oxidative stress in diabetes are highlighted. A potential intervention using nicotinamide riboside to restore redox balance as an approach to fighting diabetes is also discussed.
Collapse
Affiliation(s)
- Liang-Jun Yan
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA
| |
Collapse
|
11
|
S. Alneyadi S. Rhodanine as a Scaffold: A Short Review on Its Synthesis and Anti-Diabetic Activities. HETEROCYCLES 2018. [DOI: 10.3987/rev-17-878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
12
|
Vascular and Neuroepithelial Histopathology of the Saccule in Humans With Diabetes Mellitus. Otol Neurotol 2017; 37:553-7. [PMID: 27050649 DOI: 10.1097/mao.0000000000001018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
HYPOTHESIS This study aimed to determine if there are quantitative differences in the neuroepithelium and microvasculature of the saccule between subjects with and without diabetes mellitus (DM). BACKGROUND Histopathologic changes that may underlie the association between DM and vestibular dysfunction have not been characterized in humans. METHODS Human temporal bones (HTBs) from 39 subjects with DM (n = 16 type I DM [T1DM], n = 23 type II DM [T2DM]) were compared with 40 group age-matched controls. Vessel wall thickness was measured from the saccular arteriole. Type I and type II vestibular hair cell (VHC) counts were performed on perpendicularly oriented saccular maculae using differential interference contrast microscopy (T1DM: 5HTB/3 subjects; T2DM: 9HTB/8 subjects; controls: 25HTB/20 subjects). RESULTS The mean density of type I VHCs was 16 to 17% lower in the DM groups compared to controls (T1DM 52.21 [4.26], T2DM 53.3 [5.34], control 63.14 [2.49] cells/mm, p = 0.02). There were no differences between T1DM, T2DM, and control groups in type II VHC density (T1DM 40.89 [5.17], T2DM 40.44 [6.93], control 42.80 [1.79] cells/mm, p = 0.92) or in mean vessel wall thickness (T1DM 2.23 [0.62], T2DM 2.18 [0.53], control 2.00 [0.53] μm, p = 0.26). CONCLUSION Neuroepithelial pathology, manifested as lower density of type I VHCs, was observed in the saccules of subjects with DM. Saccular microangiopathy, expressed as alterations in arteriole thickness, was not observed. These findings are consistent with histologic observations in animals with experimentally induced diabetes. DM may have a selective and deleterious effect on human vestibular sensory epithelia.
Collapse
|
13
|
Aldose reductase, ocular diabetic complications and the development of topical Kinostat®. Prog Retin Eye Res 2016; 54:1-29. [DOI: 10.1016/j.preteyeres.2016.04.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/11/2016] [Accepted: 04/14/2016] [Indexed: 12/20/2022]
|
14
|
Umemura T, Kawamura T, Hotta N. Pathogenesis and neuroimaging of cerebral large and small vessel disease in type 2 diabetes: A possible link between cerebral and retinal microvascular abnormalities. J Diabetes Investig 2016; 8:134-148. [PMID: 27239779 PMCID: PMC5334292 DOI: 10.1111/jdi.12545] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 05/23/2016] [Indexed: 01/14/2023] Open
Abstract
Diabetes patients have more than double the risk of ischemic stroke compared with non‐diabetic individuals, and its neuroimaging characteristics have important clinical implications. To understand the pathophysiology of ischemic stroke in diabetes, it is important to focus not only on the stroke subtype, but also on the size and location of the occlusive vessels. Specifically, ischemic stroke in diabetes patients might be attributed to both large and small vessels, and intracranial internal carotid artery disease and small infarcts of the posterior circulation often occur. An additional feature is that asymptomatic lacunar infarctions are often seen in the basal ganglia and brain stem on brain magnetic resonance imaging. In particular, cerebral small vessel disease (SVD), including lacunar infarctions, white matter lesions and cerebral microbleeds, has been shown to be associated not only with stroke incidence, but also with the development and progression of dementia and diabetic microangiopathy. However, the pathogenesis of cerebral SVD is not fully understood. In addition, data on the association between neuroimaging findings of the cerebral SVD and diabetes are limited. Recently, the clinical importance of the link between cerebral SVD and retinal microvascular abnormalities has been a topic of considerable interest. Several clinical studies have shown that retinal microvascular abnormalities are closely related to cerebral SVD, suggesting that retinal microvascular abnormalities might be pathophysiologically linked to ischemic cerebral SVD. We review the literature relating to the pathophysiology and neuroimaging of cerebrovascular disease in diabetes, and discuss the problems based on the concept of cerebral large and small vessel disease.
Collapse
Affiliation(s)
| | - Takahiko Kawamura
- Department of Diabetes and Endocrine Internal Medicine, Chubu Rosai Hospital, Nagoya, Japan.,Department of Preventive Medical Center, Chubu Rosai Hospital, Nagoya, Japan
| | - Nigishi Hotta
- Department of Diabetes and Endocrine Internal Medicine, Chubu Rosai Hospital, Nagoya, Japan
| |
Collapse
|
15
|
Fukushima H, Cureoglu S, Schachern PA, Kusunoki T, Oktay MF, Fukushima N, Paparella MM, Harada T. Cochlear Changes in Patients with Type 1 Diabetes Mellitus. Otolaryngol Head Neck Surg 2016; 133:100-6. [PMID: 16025061 DOI: 10.1016/j.otohns.2005.02.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE: To evaluate the effects of diabetes on cochlear elements in human beings. STUDY DESIGN AND SETTING: Twenty-six temporal bones (mean age, 37.5 years) with type 1 diabetes and 30 age-matched controls were examined by light microscopy. We compared the findings of cochlear vessels, hair cells, spiral ganglion cells, and cochlear lateral walls. RESULTS: In diabetics, the walls of vessels of the basilar membrane ( P < 0.001) and vessels of the stria vascularis were ( P < 0.01) significantly thicker in all turns and loss of outer hair cells (OHCs) was significantly greater in the lower basal turn ( P < 0.01). Atrophy of the stria vascularis in all turns ( P < 0.0001) and loss of spiral ligament cells in upper turns ( P < 0.01) were significantly higher than controls. No significant difference was obtained in the number of spiral ganglion cells between groups. CONCLUSION: This study suggests that type 1 diabetes mellitus can cause cochlear microangiopathy and subsequently degeneration of cochlear lateral walls and OHCs.
Collapse
|
16
|
Pharmacophore and docking-based hierarchical virtual screening for the designing of aldose reductase inhibitors: synthesis and biological evaluation. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1510-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
17
|
Andleeb H, Tehseen Y, Ali Shah SJ, Khan I, Iqbal J, Hameed S. Identification of novel pyrazole–rhodanine hybrid scaffolds as potent inhibitors of aldose reductase: design, synthesis, biological evaluation and molecular docking analysis. RSC Adv 2016. [DOI: 10.1039/c6ra14531k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel pyrazole–rhodanine derivatives was designed, synthesized, and biologically evaluated for their potential inhibitory effect on both aldehyde reductase (ALR1) and aldose reductase (ALR2).
Collapse
Affiliation(s)
- Hina Andleeb
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Yildiz Tehseen
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Syed Jawad Ali Shah
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Imtiaz Khan
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Shahid Hameed
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| |
Collapse
|
18
|
|
19
|
Sabina E, Zaidul I, Ghafoor K, Jaffri J, Sahena F, Babiker E, Perumal V, Hamed M, Amid M, Khatib A. Screening of Various Parts of P
haleria macrocarpa
Plant for α-Glucosidase Inhibitory Activity. J Food Biochem 2015. [DOI: 10.1111/jfbc.12212] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- E. Sabina
- Department of Pharmaceutical Technology; Faculty of Pharmacy; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| | - I.S.M. Zaidul
- Department of Pharmaceutical Technology; Faculty of Pharmacy; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| | - Kashif Ghafoor
- Department of Food Science and Nutrition; King Saud University; Riyadh Saudi Arabia
| | - J.M. Jaffri
- Department of Pharmaceutical Technology; Faculty of Pharmacy; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| | - F. Sahena
- Faculty of Science; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| | - E.E. Babiker
- Department of Food Science and Nutrition; King Saud University; Riyadh Saudi Arabia
| | - V. Perumal
- Department of Pharmaceutical Technology; Faculty of Pharmacy; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| | - M. Hamed
- Faculty of Food Science and Technology; University Putra Malaysia; Serdang Selangor Malaysia
| | - M. Amid
- Faculty of Food Science and Technology; University Putra Malaysia; Serdang Selangor Malaysia
| | - A. Khatib
- Department of Pharmaceutical Technology; Faculty of Pharmacy; International Islamic University; Kuantan Campus 25200 Kuantan Pahang Malaysia
| |
Collapse
|
20
|
How astrocyte networks may contribute to cerebral metabolite clearance. Sci Rep 2015; 5:15024. [PMID: 26463008 PMCID: PMC4604494 DOI: 10.1038/srep15024] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/15/2015] [Indexed: 01/14/2023] Open
Abstract
The brain possesses an intricate network of interconnected fluid pathways that are vital to the maintenance of its homeostasis. With diffusion being the main mode of solute transport in cerebral tissue, it is not clear how bulk flow through these pathways is involved in the removal of metabolites. In this computational study, we show that networks of astrocytes may contribute to the passage of solutes between tissue and paravascular spaces (PVS) by serving as low resistance pathways to bulk water flow. The astrocyte networks are connected through aquaporin-4 (AQP4) water channels with a parallel, extracellular route carrying metabolites. Inhibition of the intracellular route by deletion of AQP4 causes a reduction of bulk flow between tissue and PVS, leading to reduced metabolite clearance into the venous PVS or, as observed in animal studies, a reduction of tracer influx from arterial PVS into the brain tissue.
Collapse
|
21
|
Kumar MP, Sankeshi V, Naik RR, Thirupathi P, Das B, Raju T. The inhibitory effect of Isoflavones isolated from Caesalpinia pulcherrima on aldose reductase in STZ induced diabetic rats. Chem Biol Interact 2015; 237:18-24. [DOI: 10.1016/j.cbi.2015.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/05/2015] [Accepted: 05/12/2015] [Indexed: 01/15/2023]
|
22
|
Aldose reductase inhibitors for diabetic complications: Receptor induced atom-based 3D-QSAR analysis, synthesis and biological evaluation. J Mol Graph Model 2015; 59:59-71. [DOI: 10.1016/j.jmgm.2015.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 03/23/2015] [Accepted: 03/26/2015] [Indexed: 01/26/2023]
|
23
|
Hussain S, Parveen S, Qin X, Hao X, Zhang S, Chen X, Zhu C, Ma B. Novel synthesis of nitro-quinoxalinone derivatives as aldose reductase inhibitors. Bioorg Med Chem Lett 2014; 24:2086-9. [DOI: 10.1016/j.bmcl.2014.03.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 10/25/2022]
|
24
|
Busik JV, Grant MB. Aldose reductase meets histone acetylation: a new role for an old player. Diabetes 2014; 63:402-4. [PMID: 24464719 PMCID: PMC3900550 DOI: 10.2337/db13-1696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Julia V. Busik
- Department of Physiology, Michigan State University, East Lansing, MI
- Corresponding author: Julia V. Busik,
| | - Maria B. Grant
- Departments of Ophthalmology and Cellular and Integrative Physiology, Indianapolis University, Indianapolis, IN
| |
Collapse
|
25
|
Synthesis and biological evaluation of new epalrestat analogues as aldose reductase inhibitors (ARIs). Eur J Med Chem 2014; 71:53-66. [DOI: 10.1016/j.ejmech.2013.10.043] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/26/2013] [Accepted: 10/13/2013] [Indexed: 02/05/2023]
|
26
|
|
27
|
Ota A, Kakehashi A, Toyoda F, Kinoshita N, Shinmura M, Takano H, Obata H, Matsumoto T, Tsuji J, Dobashi Y, Fujimoto WY, Kawakami M, Kanazawa Y. Effects of long-term treatment with ranirestat, a potent aldose reductase inhibitor, on diabetic cataract and neuropathy in spontaneously diabetic torii rats. J Diabetes Res 2013; 2013:175901. [PMID: 23671855 PMCID: PMC3647549 DOI: 10.1155/2013/175901] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Accepted: 01/29/2013] [Indexed: 11/18/2022] Open
Abstract
We evaluated ranirestat, an aldose reductase inhibitor, in diabetic cataract and neuropathy (DN) in spontaneously diabetic Torii (SDT) rats compared with epalrestat, the positive control. Animals were divided into groups and treated once daily with oral ranirestat (0.1, 1.0, 10 mg/kg) or epalrestat (100 mg/kg) for 40 weeks, normal Sprague-Dawley rats, and untreated SDT rats. Lens opacification was scored from 0 (normal) to 3 (mature cataract). The combined scores (0-6) from both lenses represented the total for each animal. DN was assessed by measuring the motor nerve conduction velocity (MNCV) in the sciatic nerve. Sorbitol and fructose levels were measured in the lens and sciatic nerve 40 weeks after diabetes onset. Cataracts developed more in untreated rats than normal rats (P < 0.01). Ranirestat significantly (P < 0.01) inhibited rapid cataract development; epalrestat did not. Ranirestat significantly reversed the MNCV decrease (40.7 ± 0.6 m/s) in SDT rats dose-dependently (P < 0.01). Epalrestat also reversed the prevented MNCV decrease (P < 0.05). Sorbitol levels in the sciatic nerve increased significantly in SDT rats (2.05 ± 0.10 nmol/g), which ranirestat significantly suppressed dose-dependently, (P < 0.05, <0.01, and <0.01); epalrestat did not. Ranirestat prevents DN and cataract; epalrestat prevents DN only.
Collapse
Affiliation(s)
- Ayumi Ota
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Akihiro Kakehashi
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
- *Akihiro Kakehashi:
| | - Fumihiko Toyoda
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Nozomi Kinoshita
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Machiko Shinmura
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Hiroko Takano
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Hiroto Obata
- Department of Ophthalmology, Jichi Medical University, Saitama Medical Center, 1-847 Amanuma-cho, Omiya-ku, Saitama-shi 330-8503, Japan
| | - Takafumi Matsumoto
- Pharmacology Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., Osaka 554-0022, Japan
| | - Junichi Tsuji
- Pharmacology Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., Osaka 554-0022, Japan
| | - Yoh Dobashi
- Department of Integrated Medicine I, Jichi Medical University, Saitama Medical Center, Saitama 330-8503, Japan
| | - Wilfred Y. Fujimoto
- Department of Integrated Medicine I, Jichi Medical University, Saitama Medical Center, Saitama 330-8503, Japan
- Division of Metabolism, Endocrinology and Nutrition, University of Washington School of Medicine, Seattle, WA, USA
| | - Masanobu Kawakami
- Department of Integrated Medicine I, Jichi Medical University, Saitama Medical Center, Saitama 330-8503, Japan
| | - Yasunori Kanazawa
- Department of Integrated Medicine I, Jichi Medical University, Saitama Medical Center, Saitama 330-8503, Japan
| |
Collapse
|
28
|
Kador PF, Zhang P, Makita J, Zhang Z, Guo C, Randazzo J, Kawada H, Haider N, Blessing K. Novel diabetic mouse models as tools for investigating diabetic retinopathy. PLoS One 2012; 7:e49422. [PMID: 23251343 PMCID: PMC3520987 DOI: 10.1371/journal.pone.0049422] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 10/07/2012] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE Mouse models possessing green fluorescent protein (GFP) and/or human aldose reductase (hAR) in vascular tissues have been established and crossed with naturally diabetic Akita mice to produce new diabetic mouse models. RESEARCH DESIGN AND METHODS Colonies of transgenic C57BL mice expressing GFP (SMAA-GFP), hAR (SMAA-hAR) or both (SMAA-GFP-hAR) in vascular tissues expressing smooth muscle actin were established and crossbred with C57BL/6-Ins2(Akita)/J (AK) mice to produce naturally diabetic offspring AK-SMAA-GFP and AK-SMAA-GFP-hAR. Aldose reductase inhibitor AL1576 (ARI) was administered in chow. Retinal and lenticular sorbitol levels were determined by HPLC. Retinal functions were evaluated by electroretinography (ERGs). Growth factor and signaling changes were determined by Western Blots using commercially available antibodies. Retinal vasculatures were isolated from the neural retina by enzymatic digestion. Flat mounts were stained with PAS-hematoxylin and analyzed. RESULTS Akita transgenics developed DM by 8 weeks of age with blood glucose levels higher in males than females. Sorbitol levels were higher in neural retinas of AK-SMAA-GFP-hAR compared to AK-SMAA-GFP mice. AK-SMAA-GFP-hAR mice also had higher VEGF levels and reduced ERG scotopic b-wave function, both of which were normalized by AL1576. AK-SMAA-GFP-hAR mice showed induction of the retinal growth factors bFGF, IGF-1, and TGFβ, as well as signaling changes in P-Akt, P-SAPK/JNK and P-44/42 MAPK that were also reduced by ARI treatment. Quantitative analysis of flat mounts in 18 week AK-SMAA-GFP-hAR mice revealed increased loss of nuclei/capillary length and a significant increase in the percentage of acellular capillaries present which was not seen in AK-SMAA-GFP-hAR treated with ARI. CONCLUSIONS/SIGNIFICANCE These new mouse models of early onset diabetes may be valuable tools for assessing both the role of hyperglycemia and AR in the development of retinal lesions associated with diabetic retinopathy.
Collapse
Affiliation(s)
- Peter F Kador
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America.
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Ha TJ, Lee JH, Lee MH, Lee BW, Kwon HS, Park CH, Shim KB, Kim HT, Baek IY, Jang DS. Isolation and identification of phenolic compounds from the seeds of Perilla frutescens (L.) and their inhibitory activities against α-glucosidase and aldose reductase. Food Chem 2012; 135:1397-403. [DOI: 10.1016/j.foodchem.2012.05.104] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 04/23/2012] [Accepted: 05/27/2012] [Indexed: 12/17/2022]
|
30
|
Fujita T, Yamashita D, Katsunuma S, Hasegawa S, Tanimoto H, Nibu KI. Increased inner ear susceptibility to noise injury in mice with streptozotocin-induced diabetes. Diabetes 2012; 61:2980-6. [PMID: 22851574 PMCID: PMC3478526 DOI: 10.2337/db11-1845] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We aimed to investigate the pathophysiology of diabetes-associated hearing impairment in type 1 diabetes using mice with streptozotocin-induced diabetes (C57BL/6J; male). Hearing function was evaluated 1, 3, and 5 months after induction of diabetes (five diabetic and five control animals per time point) using auditory-evoked brain stem responses (ABRs). Mice (four diabetic and four control) were exposed to loud noise (105 dB) 5 months after induction of diabetes. ABRs were measured before and after noise exposure. Cochlear blood flows were measured by laser-Doppler flowmeter. Spiral ganglion cells (SGCs) were counted. Vessel endothelial cells were observed by CD31 immunostaining. Chronologic changes in the ABR threshold shift were not significantly different between the diabetic and control groups. However, vessel walls in the modiolus of the cochleae were significantly thicker in the diabetic group than the control group. Additionally, recovery from noise-induced injury was significantly impaired in diabetic mice. Reduced cochlea blood flows and SGC loss were observed in diabetic mice cochleae after noise exposure. Our data suggest that diabetic cochleae are more susceptible than controls to loud noise exposure, and decreased cochlear blood flow due to sclerosis of the vessels and consequent loss of SGCs are possible mechanisms of hearing impairment in diabetic patients.
Collapse
MESH Headings
- Animals
- Cell Count
- Cochlea/blood supply
- Cochlea/pathology
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 1/physiopathology
- Disease Susceptibility
- Ear, Inner/blood supply
- Ear, Inner/pathology
- Ear, Inner/physiopathology
- Endothelial Cells/metabolism
- Endothelial Cells/pathology
- Evoked Potentials, Auditory, Brain Stem
- Hearing Loss, Noise-Induced/complications
- Hearing Loss, Noise-Induced/rehabilitation
- Laser-Doppler Flowmetry
- Male
- Mice
- Mice, Inbred C57BL
- Microcirculation
- Microvessels/pathology
- Microvessels/physiopathology
- Platelet Endothelial Cell Adhesion Molecule-1/metabolism
- Random Allocation
- Sclerosis
- Spiral Ganglion/pathology
- Streptozocin
Collapse
Affiliation(s)
- Takeshi Fujita
- Department of Otolaryngology–Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
| | | | | | | | | | | |
Collapse
|
31
|
Wang X, Zhang LS, Dong LL. Inhibitory effect of polysaccharides from pumpkin on advanced glycation end-products formation and aldose reductase activity. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.07.064] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
32
|
Minehira D, Takeda D, Urata H, Kato A, Adachi I, Wang X, Matsuya Y, Sugimoto K, Takemura M, Endo S, Matsunaga T, Hara A, Koseki J, Narukawa K, Hirono S, Toyooka N. Design, synthesis, and biological evaluation of novel (1-thioxo-1,2,3,4-tetrahydro-β-carbolin-9-yl)acetic acids as selective inhibitors for AKR1B1. Bioorg Med Chem 2012; 20:356-67. [DOI: 10.1016/j.bmc.2011.10.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 10/23/2011] [Accepted: 10/25/2011] [Indexed: 10/15/2022]
|
33
|
Ali S, Saeed A, Abbas N, Shahid M, Bolte M, Iqbal J. Design, synthesis and molecular modelling of novel methyl[4-oxo-2-(aroylimino)-3-(substituted phenyl)thiazolidin-5-ylidene]acetates as potent and selective aldose reductase inhibitors. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20228j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
34
|
Abdallah HM, Salama MM, Abd-elrahman EH, El-Maraghy SA. Antidiabetic activity of phenolic compounds from Pecan bark in streptozotocin-induced diabetic rats. PHYTOCHEMISTRY LETTERS 2011; 4:337-341. [DOI: 10.1016/j.phytol.2011.07.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
35
|
Chang LK, Sarraf D. Current and future approaches in the prevention and treatment of diabetic retinopathy. Clin Ophthalmol 2011; 2:425-33. [PMID: 19668733 PMCID: PMC2693984 DOI: 10.2147/opth.s736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Diabetic retinopathy (DR) is a major cause of blindness worldwide and is the number one cause of blindness in working-age individuals in developed countries. We review the current literature and discuss the pathogenesis, modifying risk factors, genetics, and treatment of DR. Special focus is placed on the rationale and effectiveness of therapeutic modalities, both current and future.
Collapse
Affiliation(s)
- Louis K Chang
- Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles, Los Angeles, CA, USA
| | | |
Collapse
|
36
|
Roy S, Ha J, Trudeau K, Beglova E. Vascular basement membrane thickening in diabetic retinopathy. Curr Eye Res 2010; 35:1045-56. [PMID: 20929292 DOI: 10.3109/02713683.2010.514659] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Vascular basement membrane (BM) thickening is a fundamental structural alteration of small blood vessels in diabetes. Over two decades of research has established hyperglycemia as the primary causal factor mediating this alteration. Various high glucose-induced mechanisms have been investigated and excess synthesis of BM components has been identified as a major contributing factor to BM thickening. Although BM thickening has been long hailed as the histological hallmark of diabetic microangiopathy, the consequences of BM thickening on the functionality of target organs of diabetes remain elusive even today. This review presents an overview of our current understanding of the BM structure and function, and focuses on how capillary BM thickening develops, its effect on retinal vascular function, and potential strategies for preventing the development of BM thickening in diabetic retinopathy.
Collapse
Affiliation(s)
- Sayon Roy
- Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA.
| | | | | | | |
Collapse
|
37
|
Kato A, Kobayashi K, Narukawa K, Minoshima Y, Adachi I, Hirono S, Nash RJ. 6,7-Dihydroxy-4-phenylcoumarin as inhibitor of aldose reductase 2. Bioorg Med Chem Lett 2010; 20:5630-3. [DOI: 10.1016/j.bmcl.2010.08.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 08/06/2010] [Accepted: 08/09/2010] [Indexed: 11/17/2022]
|
38
|
Lee SE, Ma W, Rattigan EM, Aleshin A, Chen L, Johnson LL, D'Agati VD, Schmidt AM, Barile GR. Ultrastructural features of retinal capillary basement membrane thickening in diabetic swine. Ultrastruct Pathol 2010; 34:35-41. [PMID: 20070152 DOI: 10.3109/01913120903308583] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
PURPOSE To assess retinal capillary basement membrane thickening (BMT) in a swine model of type 1 diabetes. MATERIALS AND METHODS Yorkshire pigs were rendered diabetic with streptozotocin and dyslipidemic with a high fat and cholesterol diet. At 18, 26, and 32 weeks of diabetes, the retina sections within 3 disc diameters from the optic disc were examined under transmission electron microscopy to evaluate the ultrastructural features of the capillary BM. Digital morphometric analysis was performed to measure BMT. RESULTS Diabetic swine had significantly thicker retinal capillary BMs compared to controls. Pigs that sustained diabetes for longer periods or experienced severe diabetes tended to have more BMT. Those pigs that did not sustain glucose levels above 200 mg/dL did not demonstrate thicker retinal capillary BMs. Characteristic ultrastructural features of diabetic vasculopathy observed included rarefaction as an early stage of Swiss cheese cavitation, lamellation with multiplication of electron dense layers, and fibrillar materials within capillary BM. CONCLUSIONS Diabetic Yorkshire pigs develop characteristic features of an early retinal microvasculopathy fairly rapidly and may serve as a higher-order animal model for studies of type 1 diabetes.
Collapse
Affiliation(s)
- Song Eun Lee
- Department of Ophthalmology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Kador PF, Randazzo J, Blessing K, Makita J, Zhang P, Yu K, Hosoya KI, Terasaki T. Polyol formation in cell lines of rat retinal capillary pericytes and endothelial cells (TR-rPCT and TR-iBRB). J Ocul Pharmacol Ther 2009; 25:299-308. [PMID: 19450153 DOI: 10.1089/jop.2008.0070] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The two most widely investigated animal models for diabetic retinopathy (DR) are the rat and dog. In dogs, aldose reductase (AR) is present only in retinal capillary pericytes and their destruction has been linked to polyol accumulation and resulting apoptosis. Since both rat capillary pericytes and endothelial cells have been reported to contain AR, the role of polyol pathway activity in capillary cell destruction has been investigated in rat retinal capillary pericyte (TR-rPCT) and endothelial (TR-iBRB) cells. METHODS TR-rPCT and TR-iBRB cell lines were recloned and their identities were reconfirmed by characteristic immunostaining. Cells were cultured up to 72 h in media containing 50 mM glucose or galactose with/without the AR inhibitors or a sorbitol dehydrogenase inhibitor (SDI) or with 30 mM 3-fluoro-3-deoxyglucose. Polyol levels were determined by HPLC or (19)F-NMR. Apoptosis was detected with TUNEL/DAPI staining. RESULTS Smooth muscle actin is present only in pericytes while only endothelial cells stain for von Willebrand factor and accumulate acetylated low-density lipoprotein. AR is present in both cells but AR levels are lower in endothelial cells. Aldehyde reductase is also present in both cells. Cells cultured in 50 mM glucose or galactose show significant polyol accumulation in pericytes but endothelial cells show little accumulation of galactitol and no accumulation of sorbitol. Sorbitol accumulation in pericytes resulted in increased cellular permeability and increased TUNEL staining, which was reduced by AR inhibition. CONCLUSIONS Although both rat retinal pericytes and endothelial cells contain AR, sorbitol accumulation and TUNEL staining primarily occur in pericytes and are inhibited by AR inhibitors.
Collapse
Affiliation(s)
- Peter F Kador
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, 986025 Nebraska Medical Center, Omaha, NE 68198-6025, USA.
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Vascular Findings in the Stria Vascularis of Patients With Unilateral or Bilateral Ménière's Disease. Otol Neurotol 2009; 30:1006-12. [DOI: 10.1097/mao.0b013e3181b4ec89] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
41
|
Affiliation(s)
- F Simonelli
- Department of Ophthalmology, Second University of Naples, Napoli, Italy.
| | | | | |
Collapse
|
42
|
Vascular findings in the facial nerve canal in human temporal bones with diabetes mellitus. Otol Neurotol 2009; 30:402-7. [PMID: 19318892 DOI: 10.1097/mao.0b013e31819a8845] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To identify pathological changes to vessels in the facial nerve canal among patients with diabetes mellitus. DESIGN Histopathologic human temporal bone study. SUBJECT This study examined 26 temporal bones from 13 patients with type 1 diabetes mellitus and 40 temporal bones from 20 patients with type 2 diabetes mellitus. Temporal bones from patients with type 2 diabetes mellitus were divided into 2 groups according to the method of diabetes management: insulin (n = 11) and oral hypoglycemic agents (n = 9). For the control groups, 16 age-matched normal temporal bones from 11 subjects were recruited for type 1 diabetes mellitus and 11 age-matched normal temporal bones from 8 subjects were recruited for type 2 diabetes mellitus. MAIN OUTCOME MEASURES Thicknesses of vessel walls in the labyrinthine, tympanic, and mastoid portions of the facial nerve canal were examined under light microscopy. RESULTS Vessel walls for all portions of the facial nerve canal were significantly thicker in diabetic patients than in normal controls for both types 1 and 2 diabetes. In type 2 diabetic patients, vessel wall thickness was significantly greater in patients treated with insulin therapy than in patients treated via oral hypoglycemic agents. CONCLUSION The facial nerve in patients with diabetes mellitus is ischemic compared with normal controls. These findings suggest a histologic basis for the high incidence and difficulty in achieving improvement of facial nerve palsy in patients with diabetes mellitus.
Collapse
|
43
|
Kato A, Yasuko H, Goto H, Hollinshead J, Nash RJ, Adachi I. Inhibitory effect of rhetsinine isolated from Evodia rutaecarpa on aldose reductase activity. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2009; 16:258-61. [PMID: 17498942 DOI: 10.1016/j.phymed.2007.04.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Aldose reductase inhibitors have considerable potential for the treatment of diabetic complications, without increased risk of hypoglycemia. Search for components inhibiting aldose reductase led to the discovery of active compounds contained in Evodia rutaecarpa Bentham (Rutaceae), which is the one of the component of Kampo-herbal medicine. The hot water extract from the E. rutaecarpa was subjected to distribution or gel filtration chromatography to give an active compound, N2-(2-methylaminobenzoyl)tetrahydro-1H-pyrido[3,4-b]indol-1-one (rhetsinine). It inhibited aldose reductase with IC(50) values of 24.1 microM. Furthermore, rhetsinine inhibited sorbitol accumulation by 79.3% at 100 microM. These results suggested that the E. rutaecarpa derived component, rhetsinine, would be potentially useful in the treatment of diabetic complications.
Collapse
Affiliation(s)
- A Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | | | | | | | | | | |
Collapse
|
44
|
|
45
|
Kato A, Minoshima Y, Yamamoto J, Adachi I, Watson AA, Nash RJ. Protective effects of dietary chamomile tea on diabetic complications. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:8206-8211. [PMID: 18681440 DOI: 10.1021/jf8014365] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Matricaria chamomilla L., known as "chamomile", has been used as an herbal tea or supplementary food all over the world. We investigated the effects of chamomile hot water extract and its major components on the prevention of hyperglycemia and the protection or improvement of diabetic complications in diabetes mellitus. Hot water extract, esculetin (3) and quercetin (7) have been found to show moderate inhibition of sucrase with IC50 values of 0.9 mg/mL and 72 and 71 microM, respectively. In a sucrose-loading test, the administration of esculetin (50 mg/kg body weight) fully suppressed hyperglycemia after 15 and 30 min, but the extract (500 mg/kg body weight) and quercetin (50 mg/kg body weight) were less effective. On the other hand, a long-term feed test (21 days) using a streptozotocin-induced rat diabetes model revealed that the same doses of extract and quercetin showed significant suppression of blood glucose levels. It was also found that these samples increased the liver glycogen levels. Moreover, chamomile extract showed potent inhibition against aldose reductase (ALR2), with an IC50 value of 16.9 microg/mL, and its components, umbelliferone (1), esculetin (3), luteolin (6), and quercetin (7), could significantly inhibit the accumulation of sorbitol in human erythrocytes. These results clearly suggested that daily consumption of chamomile tea with meals could contribute to the prevention of the progress of hyperglycemia and diabetic complications.
Collapse
Affiliation(s)
- Atsushi Kato
- Department of Hospital Pharmacy, University of Toyama, Toyama 930-0194, Japan.
| | | | | | | | | | | |
Collapse
|
46
|
Hohman TC, Beg MA. Oncologic, Endocrine and Metabolic: Diabetic complications: progress in the development of treatments. Expert Opin Investig Drugs 2008. [DOI: 10.1517/13543784.3.10.1041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
47
|
Berman DH, Garcia CA. Diabetic Retinopathy: A Review. Semin Dial 2007. [DOI: 10.1111/j.1525-139x.1989.tb00618.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Lorenzi M. The polyol pathway as a mechanism for diabetic retinopathy: attractive, elusive, and resilient. EXPERIMENTAL DIABETES RESEARCH 2007; 2007:61038. [PMID: 18224243 PMCID: PMC1950230 DOI: 10.1155/2007/61038] [Citation(s) in RCA: 280] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/26/2007] [Accepted: 04/24/2007] [Indexed: 12/22/2022]
Abstract
The polyol pathway is a two-step metabolic pathway in which glucose is reduced to sorbitol, which is then converted to fructose. It is one of the most attractive candidate mechanisms to explain, at least in part, the cellular toxicity of diabetic hyperglycemia because (i) it becomes active when intracellular glucose concentrations are elevated, (ii) the two enzymes are present in human tissues and organs that are sites of diabetic complications, and (iii) the products of the pathway and the altered balance of cofactors generate the types of cellular stress that occur at the sites of diabetic complications. Inhibition (or ablation) of aldose reductase, the first and rate-limiting enzyme in the pathway, reproducibly prevents diabetic retinopathy in diabetic rodent models, but the results of a major clinical trial have been disappointing. Since then, it has become evident that truly informative indicators of polyol pathway activity and/or inhibition are elusive, but are likely to be other than sorbitol levels if meant to predict accurately tissue consequences. The spectrum of abnormalities known to occur in human diabetic retinopathy has enlarged to include glial and neuronal abnormalities, which in experimental animals are mediated by the polyol pathway. The endothelial cells of human retinal vessels have been noted to have aldose reductase. Specific polymorphisms in the promoter region of the aldose reductase gene have been found associated with susceptibility or progression of diabetic retinopathy. This new knowledge has rekindled interest in a possible role of the polyol pathway in diabetic retinopathy and in methodological investigation that may prepare new clinical trials. Only new drugs that inhibit aldose reductase with higher efficacy and safety than older drugs will make possible to learn if the resilience of the polyol pathway means that it has a role in human diabetic retinopathy that should not have gone undiscovered.
Collapse
Affiliation(s)
- Mara Lorenzi
- Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, 20 Staniford Street, Boston, MA 02114, USA.
| |
Collapse
|
49
|
Etiologic Mechanisms in Diabetic Retinopathy. Retina 2006. [DOI: 10.1016/b978-0-323-02598-0.50072-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
|
50
|
Ellis EA, Sengupta N, Caballero S, Guthrie SM, Mames RN, Grant MB. Nitric oxide synthases modulate progenitor and resident endothelial cell behavior in galactosemia. Antioxid Redox Signal 2005; 7:1413-22. [PMID: 16356104 DOI: 10.1089/ars.2005.7.1413] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We used knockout animals of either inducible nitric oxide synthase (iNOS(/)) or endothelial NOS (eNOS(/)) to characterize the role of NOS in galactosemia, a model of diabetic retinopathy. NADH oxidase and nitrotyrosine were used as biomarkers of oxidative stress and vascular dysfunction. These animals were engrafted with hematopoietic stem cells (HSC) expressing green fluorescence protein (gfp(+)) to characterize the contribution of HSC and endothelial progenitor cells to neovascularization. Increased NADH oxidase activity and superoxide generation occurred in all galactose-fed mice. eNOS(/) mice demonstrated increased iNOS immunoreactivity in their retinal vasculature. Nitrotyrosine levels were low at baseline in the wild-type (WT) mice, eNOS(/) and iNOS(/) mice, and the galactose-fed iNOS mice and increased following galactose feeding in eNOS(/) and WT. Galactose-fed WT.gfp and iNOS(/).gfp chimeric animals had areas of perfused new vessels composed of gfp(+) cells. In contrast, galactose-fed eNOS(/).gfp mice produced copious, unbranched, nonperfused tubes. Thus, nitric oxide modulates HSC behavior and vascular phenotype in the retina. Although there is increased NADH oxidase and superoxide in galactosemic mice of all isoforms, iNOS is the source of nitric oxide responsible for peroxynitrite and nitrotyrosine formation that leads to the pathology observed in galactosemic mice.
Collapse
Affiliation(s)
- E Ann Ellis
- Microscopy and Imaging Center, Texas A&M University, College Station, TX, USA
| | | | | | | | | | | |
Collapse
|