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Prosser KE, Xie D, Chu A, MacNeil GA, Varju BR, Kadakia RT, Que EL, Walsby CJ. Copper(II) Pyridyl Aminophenolates: Hypoxia-Selective, Nucleus-Targeting Cytotoxins, and Magnetic Resonance Probes. Chemistry 2021; 27:9839-9849. [PMID: 33878230 DOI: 10.1002/chem.202100603] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Indexed: 11/10/2022]
Abstract
Targeting the low-oxygen (hypoxic) environments found in many tumours by using redox-active metal complexes is a strategy that can enhance efficacy and reduce the side effects of chemotherapies. We have developed a series of CuII complexes with tridentate pyridine aminophenolate-based ligands for preferential activation in the reduction window provided by hypoxic tissues. Furthermore, ligand functionalization with a pendant CF3 group provides a 19 F spectroscopic handle for magnetic-resonance studies of redox processes at the metal centre and behaviour in cellular environments. The phenol group in the ligand backbone was substituted at the para position with H, Cl, and NO2 to modulate the reduction potential of the CuII centre, giving a range of values below the window expected for hypoxic tissues. The NO2 -substituted complex, which has the highest reduction potential, showed enhanced cytotoxic selectivity towards HeLa cells grown under hypoxic conditions. Cell death occurs by apoptosis, as determined by analysis of the cell morphology. A combination of 19 F NMR and ICP-OES indicates localization of the NO2 complex in HeLa cell nuclei and increased cellular accumulation under hypoxia. This correlates with DNA nuclease activity being the likely origin of cytotoxic activity, as demonstrated by cleavage of DNA plasmids in the presence of the CuII nitro complex and a reducing agent. Selective detection of the paramagnetic CuII complexes and their diamagnetic ligands by 19 F MRI suggests hypoxia-targeting theranostic applications by redox activation.
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Affiliation(s)
- Kathleen E Prosser
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada.,Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Da Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Annica Chu
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Gregory A MacNeil
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Bryton R Varju
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Rahul T Kadakia
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Charles J Walsby
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
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Rostampour M, Noori K, Heidari M, Fadaei R, Tahmasian M, Khazaie H, Zarei M. White matter alterations in patients with obstructive sleep apnea: a systematic review of diffusion MRI studies. Sleep Med 2020; 75:236-245. [DOI: 10.1016/j.sleep.2020.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 12/25/2022]
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Olszewska A, Schmidt MJ, Failing K, Nicpoń J, Podgórski P, Wrzosek MA. Interictal Single-Voxel Proton Magnetic Resonance Spectroscopy of the Temporal Lobe in Dogs With Idiopathic Epilepsy. Front Vet Sci 2020; 7:644. [PMID: 33195502 PMCID: PMC7541947 DOI: 10.3389/fvets.2020.00644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/10/2020] [Indexed: 11/16/2022] Open
Abstract
Proton magnetic resonance spectroscopy (H1-MRS) could provide insight into the metabolic pathophysiology of the temporal lobe of canine brain after seizure. Currently, there is no evidence-based data available on MRS of temporal lobe in dogs with idiopathic epilepsy (IE). The aim of this prospective, cross-sectional study was to evaluate the interictal metabolic activity of the temporal lobe in IE dogs compared to a control group with the use of H1-MRS. Ten healthy dogs and 27 client-owned dogs with IE underwent 1.5-Tesla magnetic resonance imaging (MRI) and single-voxel H1-MRS. The MRS studies were acquired as spin echoes with a repetition time (TR) of 2,000 ms and an echo time (TE) of 144 ms. A cubic voxel (10 ×10 ×10 mm) was positioned bilaterally into the region of the left and right temporal lobe, including a middle part of the hippocampus and the amygdala. The N-acetylaspartate (NAA)-to-creatine (NAA/Cr), NAA-to-choline (NAA/Cho), choline-to-creatine (Cho/Cr), and choline-to-NAA (Cho/NAA) ratios were determined in both hemispheres and compared to controls. No significant differences in all metabolite ratios between epileptic dogs and the control group could be found. A time-dependent decrease in the NAA/Cho ratio as well as an increase in the Cho/NAA ratio was found with proximity in time to the last seizure. We found no correlation between metabolite ratios and age or sex in this animal group. Time span from the last seizure to the acquisition of MRS significantly correlated with NAA/Cho and Cho/NAA ratio. We conclude that without a time relation, metabolite ratios in dogs with IE do not differ from those of the control group.
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Affiliation(s)
- Agnieszka Olszewska
- Department of Veterinary Clinical Science, Small Animal Clinic, Justus-Liebig-University Giessen, Giessen, Germany
| | - Martin Jürgen Schmidt
- Department of Veterinary Clinical Science, Small Animal Clinic, Justus-Liebig-University Giessen, Giessen, Germany
| | - Klaus Failing
- Unit for Biomathematics and Data Processing, Faculty of Veterinary Medicine, Justus Liebig-University Giessen, Giessen, Germany
| | - Józef Nicpoń
- Department of Internal Diseases With a Clinic for Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland.,Center of Experimental Diagnostics and Innovative Biomedical Technologies, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Przemysław Podgórski
- Department of General Radiology and Interventional Radiology and Neuroradiology, Wrocław Medical University, Wrocław, Poland
| | - Marcin Adam Wrzosek
- Department of Internal Diseases With a Clinic for Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
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Kang JJ, Kim J, Park S, Paek S, Kim TH, Kim DK. Feasibility of Ultrasound-Guided Trigger Point Injection in Patients with Myofascial Pain Syndrome. Healthcare (Basel) 2019; 7:healthcare7040118. [PMID: 31618922 PMCID: PMC6956081 DOI: 10.3390/healthcare7040118] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 01/09/2023] Open
Abstract
We compared the feasibility of ultrasound (US)-guided myofascial trigger point (MTrP) injection with that of a blind injection technique following the use of shear wave elastography (SWE) for the measurement of stiffness at the MTrPs in patients with trapezius myofascial pain syndrome (MPS). A total of 41 patients (n = 41) were randomized to either the trial group (n = 21, SWE combined with US-guided injection) or the control group (n = 20, SWE combined with blind injection). At baseline and four weeks, they were evaluated for the manual muscle test (MMT), the range of motion (ROM), pain visual analogue scale (VAS) scores, Shoulder Pain and Disability Index (SPADI) scores and Neck Disability Index (NDI) scores during the abduction, adduction, flexion, extension, external rotation and internal rotation of the shoulder joint. Differences in changes in pain VAS scores, NDI scores and SPADI scores at four weeks from baseline between the two groups reached statistical significance (p = 0.003, 0.012, and 0.018, respectively). US-guided MTrP injection is a more useful modality as compared with a blind injection in patients with MPS.
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Affiliation(s)
- Jung Joong Kang
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Jungin Kim
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Seunghun Park
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Sungwoo Paek
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Tae Hee Kim
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Dong Kyu Kim
- Department of Rehabilitation Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju 27376, Korea.
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方 旭, 边 云, 陈 士, 陆 建, 王 莉. 氢质子磁共振波谱对胰腺癌分析及其分化程度相关性研究. Shijie Huaren Xiaohua Zazhi 2017; 25:1454-1460. [DOI: 10.11569/wcjd.v25.i16.1454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
目的 探讨氢质子磁共振波谱(1H magnetic resonance spectroscopy, 1H MRS)分析胰腺癌瘤体与瘤旁导管上皮内瘤变(pancreatic duct intraepithelial neoplasia, Pan IN)病变及肿瘤不同分化程度的代谢物差异.
方法 病理确诊为胰腺导管腺癌的患者47例(低分化17例、中分化30例), 术前均行1H MRS检查, 使用呼吸门控的抑水点分辨波谱序列对肿瘤的瘤体、瘤旁组织进行1H MRS检测. 分析出每个1H MRS数据的胆碱峰(choline-containing metabolites, CCM)/脂肪峰(lipid, Lip)、胆固醇及不饱和脂肪酸峰(cholesterol and unsaturated fatty acids, Chol+Unsat)/Lip、Chol+Unsat/CCM的峰下面积比, 采用配对样本t检验比较瘤体和瘤旁组织的代谢物差异, 用独立样本t检验比较胰腺导管腺癌低分化组和中分化组的代谢物差异.
结果 同时获得瘤体和瘤旁数据共24例, 瘤体组织的CCM/Lip高于瘤旁组织(0.266±0.084 vs 0.200±0.081), 瘤体组织的Chol+Unsat/Lip高于瘤旁组织(0.324±0.109 vs 0.258±0.092), 差异均有统计学意义(P<0.05), 瘤体和瘤旁组织的Chol+Unsat/CCM无统计学差异; 胰腺低分化和中分化导管腺癌的CCM/Lip、Chol+Unsat/Lip、Chol+Unsat/CCM无统计学差异.
结论 1H MRS对鉴别胰腺癌与瘤旁Pan IN病变具有一定意义, 但不可预测其肿瘤分化程度.
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Dogan F, Sen Dokumaci D, Yildirim A, Bozdogan E, Boyaci FN, Koca B, Karakas E. Brain diffusion changes in Eisenmenger syndrome. Br J Radiol 2016; 89:20151007. [PMID: 27767324 DOI: 10.1259/bjr.20151007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE This preliminary study aimed to evaluate whether there are changes in the apparent diffusion coefficient (ADC) values of the brain in patients presenting with Eisenmenger syndrome (ES). METHODS This cross-sectional study included 10 consecutively recruited patients with ES and 10 healthy control subjects. In the patients and controls, eight distinct neuroanatomical locations were selected for analysis. Quantitative measurements of ADC values of the frontal white matter (FWM), occipital white matter, lentiform nucleus (LN), thalamus, frontal cortex, anterior and posterior limbs of the internal capsule and caudate nucleus were measured. Statistical analysis was performed using SPSS® (IBM Corp., New York, NY; formerly SPSS Inc., Chicago, IL) for Windows v. 20. Data were presented as mean ± standard deviation values. The Kruskal-Wallis test was used to assess differences in the ADC values of each brain location between the ES group and the control group. Statistical significance was accepted at the level of p < 0.05. RESULTS The ADC values of the FWM and LN were significantly higher in the ES group than that in the control group. The mean ADC levels of other brain regions were not significantly different between the groups. CONCLUSION Chronic hypoxia in patients with ES may lead to diffusion changes in the brain tissue. There is a need for further studies to assess the clinical significance of cerebral ADC values in patients with ES. Advances in knowledge: The ratio of extracellular volume to intracellular volume in the FWM and LN can be considered to be increased in patients with ES.
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Affiliation(s)
- Ferit Dogan
- 1 Department of Radiology, Sanliurfa Children's Hospital, Sanliurfa, Turkey
| | - Dilek Sen Dokumaci
- 2 Department of Radiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Ali Yildirim
- 3 Department of Pediatric Cardiology, Sanliurfa Children's Hospital, Sanliurfa, Turkey
| | - Erol Bozdogan
- 2 Department of Radiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Fatima N Boyaci
- 2 Department of Radiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Bulent Koca
- 4 Department of Pediatric Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Ekrem Karakas
- 2 Department of Radiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
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Fang X, Bian Y, Wang L. Clinical application of magnetic resonance spectroscopy in diagnosis of pancreatic cancer. Shijie Huaren Xiaohua Zazhi 2016; 24:368-374. [DOI: 10.11569/wcjd.v24.i3.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer (PC) is one of the most frequent malignant tumors of the digestive system, which is difficultly detected and highly aggressive. More than 80% of patients with PC present with advanced disease that is incurable by surgery. Thus, early diagnosis and surgery before frank invasion occurs are critical for improving PC patients' outcomes. Magnetic resonance spectroscopy (MRS) is conducive to screening, early diagnosis and differential diagnosis of PC. Nowadays, MRS is preeminently a tool for nondestructive chemical analysis and metabolic profiling. MRS is expected to be a sensitive and accurate method for PC diagnosis and differential diagnosis, for tracking tumor change and for assessing treatment response.
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Emin Akkoyunlu M, Kart L, Kılıçarslan R, Bayram M, Aralasmak A, Sharifov R, Alkan A. Brain diffusion changes in obstructive sleep apnoea syndrome. Respiration 2013; 86:414-20. [PMID: 23751445 DOI: 10.1159/000350461] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 02/28/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Obstructive sleep apnoea syndrome (OSAS) is a disorder characterized by repeated apnoeic episodes during sleep. Neurocognitive changes secondary to OSAS are likely to occur due to hypoxia in certain brain locations. Advances in magnetic resonance imaging technology, such as diffusion-weighted imaging (DWI), enable non-invasive and accurate identification of OSAS-induced changes. OBJECTIVE We aimed to use DWI to investigate changes in the brain secondary to hypoxia in OSAS. METHODS Eighty-eight patients underwent polysomnography and were classified as non-OSAS, mild-moderate OSAS and severe OSAS sufferers. DWI was used to evaluate 14 areas of the brain, and apparent diffusion coefficients (ADCs) were calculated. We investigated whether there were differences in the ADC values in specific areas of the brain between the non-OSAS and OSAS patients. RESULTS We measured the ADC values of the 68 newly diagnosed OSAS patients (21 mild, 15 moderate and 32 severe) and of 20 healthy controls. There were significant increases in the ADC values in the hippocampus, amygdala and putamen in OSAS patients. Compared to the non-OSAS subjects, the ADC values of the putamen in severe OSAS patients, those of the hippocampus in moderate or severe OSAS patients and those of the amygdala in moderate OSAS patients were significantly increased. A negative correlation between the lowest oxygen saturation during sleep and the ADC values of the hippocampus and amygdala was found. CONCLUSIONS Increased ADC levels in the hippocampus, amygdala and putamen in OSAS patients indicate hypoxia and likely cause vasogenic oedema in specific regions of the brain.
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Bubnov RV. Evidence-based pain management: is the concept of integrative medicine applicable? EPMA J 2012; 3:13. [PMID: 23088743 PMCID: PMC3533862 DOI: 10.1186/1878-5085-3-13] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 09/28/2012] [Indexed: 11/21/2022]
Abstract
This article is dedicated to the concept of predictive, preventive, and personalized (integrative) medicine beneficial and applicable to advance pain management, overviews recent insights, and discusses novel minimally invasive tools, performed under ultrasound guidance, enhanced by model-guided approach in the field of musculoskeletal pain and neuromuscular diseases. The complexity of pain emergence and regression demands intellectual-, image-guided techniques personally specified to the patient. For personalized approach, the combination of the modalities of ultrasound, EMG, MRI, PET, and SPECT gives new opportunities to experimental and clinical studies. Neuromuscular imaging should be crucial for emergence of studies concerning advanced neuroimaging technologies to predict movement disorders, postural imbalance with integrated application of imaging, and functional modalities for rehabilitation and pain management. Scientific results should initiate evidence-based preventive movement programs in sport medicine rehabilitation. Traditional medicine and mathematical analytical approaches and education challenges are discussed in this review. The physiological management of exactly assessed pathological condition, particularly in movement disorders, requires participative medical approach to gain harmonized and sustainable effect.
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Affiliation(s)
- Rostyslav V Bubnov
- The Centre of Ultrasound Diagnostics and Interventional Sonography, Clinical Hospital 'Pheophania' of State Affairs Department, Zabolotny str,, 21, Kyiv, 03680, Ukraine.
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