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https://www.readbyqxmd.com/read/28247895/mri-guided-and-ultrasound-triggered-release-of-no-by-advanced-nanomedicine
#1
Zhaokui Jin, Yanyuan Wen, Yaxin Hu, Wenwen Chen, Xianfeng Zheng, Weisheng Guo, Tianfu Wang, Zhiyong Qian, Bao-Lian Su, Qianjun He
Nitric oxide (NO) has been well identified as a specific free radical molecule possessing wide-ranging therapeutic effects. Targeted delivery and controlled release of NO are highly desired to realize precision gas therapy, but are still challenging owing to the non-targetability and uncontrollability of NO itself. Herein, we propose a new concept of MRI-guided and ultrasound-triggered gas release for precision gas therapy. Based on this concept, we develop a novel ultrasound-responsive BNN-type NO-releasing molecule (NORM) and an advanced rattle-type nano-carrier of superparamagnetic iron oxide-encapsulated mesoporous silica nanoparticles (SPION@hMSN), and use them to construct a new intelligent nanomedicine (BNN6-SPION@hMSN) for the first time...
March 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28214652/unilateral-oculomotor-palsy-in-charcot-marie-tooth-disease-1a-cmt-1a
#2
A Posa, A Emmer, M E Kornhuber
BACKGROUND: Charcot-Marie-Tooth disease (CMT) type 1A is the most common form of CMT 1 and one of the autosomal dominant demyelinating hereditary motor and sensory neuropathies (HMSN). Cranial nerves may be frequently subclinically affected in CMT disease. However manifest clinical signs of cranial nerve involvement are rare. METHODS: This case comprise neurological, ophthalmological, internal medicine and ear-nose-throat investigation, motor and sensory nerve conduction velocity, auditory evoked potentials and orbicularis-oculi reflex measurements, lumbar puncture and blood examination, inclusive molecular genetic testing, as well as electrocardiogram and cranial imaging such as computer tomography and magnetic resonance imaging RESULTS: The present case shows a Charcot-Marie-Tooth (CMT) 1A patient with complete unilateral oculomotor palsy in combination with predominant ipsilateral subclinical trigeminal demyelination...
April 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28196470/proteasome-impairment-in-neural-cells-derived-from-hmsn-p-patient-ipscs
#3
Nagahisa Murakami, Keiko Imamura, Yuishin Izumi, Naohiro Egawa, Kayoko Tsukita, Takako Enami, Takuya Yamamoto, Toshitaka Kawarai, Ryuji Kaji, Haruhisa Inoue
Hereditary motor and sensory neuropathy with proximal dominant involvement (HMSN-P) is caused by a heterozygous mutation (P285L) in Tropomyosin-receptor kinase Fused Gene (TFG), histopathologically characterized by progressive spinal motor neuron loss with TFG cytosolic aggregates. Although the TFG protein, found as a type of fusion oncoprotein, is known to facilitate vesicle transport from endoplasmic reticulum (ER) to Golgi apparatus at ER exit site, it is unclear how mutant TFG causes motor neuron degeneration...
February 15, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28003645/hmsn-lom-in-12-czech-patients-with-one-unusual-case-due-to-uniparental-isodisomy-of-chromosome-8
#4
Dana Šafka Brožková, Jaroslava Paulasová Schwabová, Jana Neupauerová, Jana Sabová, Marcela Krůtová, Vladimír Peřina, Marie Trková, Petra Laššuthová, Pavel Seeman
Hereditary motor and sensory neuropathy-type Lom (HMSNL), also known as CMT4D, a demyelinating neuropathy with late-onset deafness is an autosomal recessive disorder threatening Roma population worldwide. The clinical phenotype was reported in several case reports before the gene discovery. HMSNL is caused by a homozygous founder mutation p.Arg148* in the N-Myc downstream-regulated gene 1. Here, we report findings from the Czech Republic, where HMSNL was found in 12 Czech patients from eight families. In these 12 patients, 11 of the causes were due to p...
March 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/27987779/lipid-coated-hollow-mesoporous-silica-nanospheres-for-co-delivery-of-doxorubicin-and-paclitaxel-preparation-sustained-release-cellular-uptake-and-pharmacokinetics
#5
Yang Qiu, Chao Wu, Jie Jiang, Yanna Hao, Ying Zhao, Jie Xu, Tong Yu, Peng Ji
A carrier consisting of lipid-coated hollow mesoporous silica nanospheres (L-HMSN) was produced for the combination of the water-insoluble drug (paclitaxel, PTX) and the water-soluble drug (doxorubicin, DOX). DOX was adsorbed into the nanoscale hollow structure of the hollow mesoporous silica nanospheres (HMSN) by adsorption and PTX was wrapped in the phospholipid layer of the HMSN surface by lipid film hydration method. The characterization results showed that DOX and PTX were present in the nanopheres in an amorphous state...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27982524/a-novel-ndrg1-mutation-in-a-non-romani-patient-with-cmt4d-hmsn-lom
#6
Giuseppe Piscosquito, Stefania Magri, Paola Saveri, Micaela Milani, Claudia Ciano, Laura Farina, Franco Taroni, Davide Pareyson
Charcot-Marie-Tooth disease type 4D (CMT4D), also known as hereditary motor and sensory neuropathy Lom type (HMSNL), is an autosomal recessive, early onset, severe demyelinating neuropathy with hearing loss, caused by N-Myc downstream-regulated gene 1 (NDRG1) mutations. CMT4D is rare with only three known mutations, one of which (p.Arg148Ter) is found in patients of Romani ancestry and accounts for the vast majority of cases. We report a 38-year-old Italian female with motor development delay, progressive neuropathy, and sensorineural deafness...
March 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/27884603/cranial-nerve-involvement-in-charcot-marie-tooth-disease
#7
Nirav Das, Savannah Kandalaft, Xiao Wu, Ajay Malhotra
BACKGROUND: Charcot-Marie-Tooth Disease (CMT) is a rare disorder with less than 200,000 cases reported in the US every year, making diagnosis challenging. MR and CT imaging has become more common in the evaluation of CMT to identify areas of disease involvement. CASE REPORT: A 27-year-old female from Guatemala with a past history of polio initially presented to the emergency room for necrotizing pneumonia. MRI images demonstrated smoothly enlarged, mildly enhancing trigeminal nerves...
March 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27822577/combined-bortezomib-based-chemotherapy-and-p53-gene-therapy-using-hollow-mesoporous-silica-nanospheres-for-p53-mutant-non-small-cell-lung-cancer-treatment
#8
Chun Li, Junqing Hu, Wenyao Li, Guosheng Song, Jia Shen
Our previous work reported the development of a proteasome inhibitor, bortezomib (BTZ) encapsulated hollow mesoporous silica nanospheres (HMSNs), as a biocompatible and effective drug-delivery system for non-small cell lung cancer (NSCLC) therapy. Then we found that the tumor-suppressing effect of BTZ or HMSNs-BTZ was compromised in p53 null/mutant NSCLC. In fact, clinical studies have shown a beneficial effect of the combination of p53 gene therapy and chemotherapeutic drugs for patients with NSCLC, especially with the p53 gene null/mutant NSCLC...
December 20, 2016: Biomaterials Science
https://www.readbyqxmd.com/read/27764520/warburg-micro-syndrome-type-1-associated-with-peripheral-neuropathy-and-cardiomyopathy
#9
D Kabzińska, H Mierzewska, J Senderek, A Kochański
The Warburg micro syndrome (WARBM) is a genetically heterogeneous syndrome linked to at least 4 loci. At the clinical level, WARBM is characterized by microcephaly, microphthalmia, microcornea, congenital cataracts, corpus callosum hypoplasia, severe mental retardation, and hypogonadism. In some families additional clinical features have been reported. The presence of uncommon clinical features (peripheral neuropathy, cardiomyopathy) may result in misdirected molecular diagnostics. Using the next generation sequencing approach (NGS), we were able to diagnose WARBM1 syndrome by detection of a new mutation within the RAB3GAP1 gene...
2016: Folia Neuropathologica
https://www.readbyqxmd.com/read/27502085/diagnostic-accuracy-of-nerve-ultrasound-in-hereditary-and-sporadic-non-entrapment-neuropathies
#10
Kai F Loewenbrück, Markus Dittrich, Josef Böhm, Jürgen Klingelhöfer, Petra Baum, Jochen Schäfer, Rainer Koch, Alexander Storch
The objective of this study is to compare the diagnostic accuracy of nerve ultrasound (US) and nerve conduction studies (NCS) for acquired non-entrapment peripheral neuropathies (PNP) and hereditary motor and sensory neuropathies (HMSN) in a routine clinical setting. The methods are based on a single-center, prospective, examiner-blinded cross-sectional study on three subject groups of healthy controls, PNP (both enrolled by a consecutive recruitment strategy), and HMSN patients (convenience sample). A clinical reference standard based on the neuropathy impairment (NIS) and neuropathy symptoms scores (NSS) was used for PNP as the external validation criterion...
November 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27230413/kcc3-axonopathy-neuropathological-features-in-the-central-and-peripheral-nervous-system
#11
Roland N Auer, Janet L Laganière, Yves O Robitaille, John Richardson, Patrick A Dion, Guy A Rouleau, Masoud Shekarabi
Hereditary motor and sensory neuropathy associated with agenesis of the corpus callosum (HMSN/ACC) is an autosomal recessive disease of the central and peripheral nervous system that presents as early-onset polyneuropathy. Patients are hypotonic and areflexic from birth, with abnormal facial features and atrophic muscles. Progressive peripheral neuropathy eventually confines them to a wheelchair in the second decade of life, and death occurs by the fourth decade. We here define the neuropathologic features of the disease in autopsy tissues from eight cases...
September 2016: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/26937591/polymeric-prodrug-grafted-hollow-mesoporous-silica-nanoparticles-encapsulating-near-infrared-absorbing-dye-for-potent-combined-photothermal-chemotherapy
#12
Yuanyuan Zhang, Chung Yen Ang, Menghuan Li, Si Yu Tan, Qiuyu Qu, Yanli Zhao
In this study, polymeric prodrug coated hollow mesoporous silica nanoparticles (HMSNs) with encapsulated near-infrared (NIR) absorbing dye were prepared and explored for combined photothermal-chemotherapy. A copolymer integrated with tert-butoxycarbonyl protected hydrazide groups and oligoethylene glycols was initially grafted on the surface of HMSNs via reversible addition-fragmentation chain-transfer (RAFT) polymerization followed by the deprotection to reactivate the hydrazide groups for the conjugation of anticancer drug doxorubicin (DOX)...
March 23, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/26822750/hsmnr-belongs-to-the-most-frequent-types-of-hereditary-neuropathy-in-the-czech-republic-and-is-twice-more-frequent-than-hmsnl
#13
D Šafka Brožková, J Haberlová, R Mazanec, J Laštůvková, P Seeman
Hereditary motor and sensory neuropathy type Russe (HMSNR), also called CMT4G, is an autosomal recessive inherited peripheral neuropathy (IPN) caused by a founder mutation in the HK1 gene. HMSNR affects only patients with Roma origin, similar to the better known HMSN type Lom clarified earlier. By testing IPN patients with Roma origin, we realized that HMSNR affects surprisingly many patients in the Czech Republic. HMSNR is one of the most frequent types of IPN in this country and appears to be twice more frequent than HMSNL...
August 2016: Clinical Genetics
https://www.readbyqxmd.com/read/26581383/pathogenic-mutations-and-sequence-variants-within-mitofusin-2-gene-in-polish-patients-with-different-hereditary-motor-sensory-neuropathies
#14
Katarzyna Kotruchow, Dagmara Kabzińska, Andrzej Kochański
At the time of its first description in 2004, MFN2 was considered the most frequently mutated gene in hereditary motor and sensory neuropathy type 2 (HMSN 2). However recent studies have shown that the frequency of MFN2 gene mutations in HMSN II patients is surprisingly low. To date, no systematic studies devoted to HMSN IIa in Poland have been carried out. In this study, we searched for MFN2 gene mutations in Polish patients representing the population of nearly 40 million. We decided to include a wide spectrum of clinical phenotypes in the study, proving able to detect, in a group of 67 affected patients: 1) 3 pathogenic mutations; 2) 3 sequence variants of unknown pathogenic status; 3) 9 rare MFN2 gene sequence variants; 4) 6 common polymorphisms...
2015: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/26479344/analysis-of-pmp22-duplication-and-deletion-using-a-panel-of-six-dinucleotide-tandem-repeats
#15
Milica Gagic, Milica Keckarevic Markovic, Miljana Kecmanovic, Dusan Keckarevic, Jelena Mladenovic, Jelena Dackovic, Vedrana Milic-Rasic, Stanka Romac
BACKGROUND: Charcot-Marie-Tooth type 1A (CMT1A) is the most common type of hereditary motor and sensory neuropathies (HMSN), caused by the duplication of the 17p11.2 region that includes the PMP22 gene. Reciprocal deletion of the same region is the main cause of hereditary neuropathy with liability to pressure palsies (HNPP). CMT1A accounts for approximately 50% of HMSN patients. Diagnostics of CMT1A and HNPP are based on quantitative analysis of the affected region or RFLP detection of breakage points...
May 2016: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/26103812/-two-cases-of-hereditary-motor-and-sensory-neuropathy-with-proximal-dominant-involvement-hmsn-p
#16
Chiaki Mori, Tomoko Saito, Toshio Saito, Harutoshi Fujimura, Saburo Sakoda
We, herein, report two independent cases with hereditary motor and sensory neuropathy with proximal dominant involvement (HMSN-P) inherited in an autosomal dominant fashion. Their common clinical features are slowly progressive proximal dominant muscular atrophy, fasciculations and mild to moderate distal sensory disturbance with areflexia. Nerve conduction study revealed an absence of sensory nerve action potentials, in contrast to almost normal compound muscle action potentials. Gene analysis in both patients elucidated heterozygous mutation (c...
2015: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/26053813/first-reported-case-of-charcot-marie-tooth-disease-type-4c-in-a-child-from-india-with-sh3tc2-mutation-but-absent-spinal-deformities
#17
Umesh Dinkar Kalane, Chaitanya Datar, Anita Mahadevan
Charcot Marie Tooth (CMT) disease is a group of hereditary motor sensory neuropathies with significant genetic heterogeneity. This disorder has been scarcely reported in the Indian literature. Here, we report a case of the rare but relatively more severe autosomal recessive CMT type 4C disease with a few features that are distinct from its regular presentation. Our patient was proven to have one of the common mutations in the SH3TC2 gene, which has so far not been described in Indian patients.
May 2015: Neurology India
https://www.readbyqxmd.com/read/26019414/neurological-associations-in-auditory-neuropathy-spectrum-disorder-results-from-a-tertiary-hospital-in-south-india
#18
Anjali Lepcha, Reni K Chandran, Mathew Alexander, Ann Mary Agustine, K Thenmozhi, Achamma Balraj
AIMS: To find out the prevalence and types of neurological abnormalities associated in auditory neuropathy spectrum disorder in a large tertiary referral center. SETTINGS AND DESIGN: A prospective clinical study was conducted on all patients diagnosed with auditory neuropathy spectrum disorder in the ear, nose, and throat (ENT) and neurology departments during a 17-month period. Patients with neurological abnormalities on history and examination were further assessed by a neurologist to determine the type of disorder present...
April 2015: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/25957633/acute-optic-neuropathy-associated-with-a-novel-mfn2-mutation
#19
Luca Leonardi, Christian Marcotulli, Eugenia Storti, Alessandra Tessa, Mariano Serrao, Vincenzo Parisi, F M Santorelli, Francesco Pierelli, Carlo Casali
Mutations in the mitofusin 2 (MFN2) gene cause CMT2A the most common form of autosomal dominant axonal Charcot-Marie-Tooth (CMT). In addition, mutations in MFN2 have been shown to be responsible for Hereditary Motor Sensory Neuropathy type VI (HSMN VI), a rare early-onset axonal CMT associated with optic neuropathy. Most reports of HMSN VI presented with a sub-acute form of optic neuropathy. Herein, we report a CMT2A patient, who developed very rapidly progressing severe optic neuropathy. A 40-year-old Caucasian man was evaluated for gait disturbance and lower limbs weakness, slowly progressed over the last 2 years...
July 2015: Journal of Neurology
https://www.readbyqxmd.com/read/25955122/hollow-mesoporous-silica-nanoparticles-for-tumor-vasculature-targeting-and-pet-image-guided-drug-delivery
#20
Rubel Chakravarty, Shreya Goel, Hao Hong, Feng Chen, Hector F Valdovinos, Reinier Hernandez, Todd E Barnhart, Weibo Cai
AIM: Development of multifunctional and well-dispersed hollow mesoporous silica nanoparticles (HMSNs) for tumor vasculature targeted drug delivery and PET imaging. MATERIALS & METHODS: Amine functionalized HMSNs (150-250 nm) were conjugated with a macrocyclic chelator, (S)-2-(4-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triaceticacid (NOTA), PEGylated and loaded with antiangiogenesis drug, Sunitinib. Cyclo(Arg-Gly-Asp-D-Tyr-Lys) (cRGDyK) peptide was attached to the nanoconjugate and radiolabeled with (64)Cu for PET imaging...
2015: Nanomedicine
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