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1.
Eur Spine J ; 27(Suppl 3): 303-308, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-28695275

RESUMEN

PURPOSE: Melanotic schwannoma (MS) is rare, accounting for less than 1% of primary peripheral nerve sheath tumors, and most often occurs in the paraspinal nerve roots. Intramedullary MS is exceedingly rare, and to the best of our knowledge, only nine cases have been reported in literature. METHODS AND RESULTS: We present a 47-year-old male, who underwent excision of thoracic intraspinal space-occupying lesion 6 years ago, as the 10th known case to date of intradural intramedullary MS that had a more invasive growth pattern than those reported before, and we review the diagnosis, clinicopathologic features, treatment and prognosis of intramedullary MS. CONCLUSIONS: Intramedullary MS' behavior is unpredictable and can have an aggressive clinical course such as recurrence and metastasis.


Asunto(s)
Neurilemoma/diagnóstico , Procedimientos Neuroquirúrgicos/métodos , Médula Espinal/patología , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/patología , Neurilemoma/patología , Neurilemoma/cirugía , Pronóstico , Médula Espinal/cirugía
2.
Acta Neurochir (Wien) ; 160(8): 1563-1569, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-29911245

RESUMEN

OBJECT: Intratumoral hemorrhage (ITH) associated with vestibular schwannomas (VS) is very rare. We retrospectively analyzed VS patients presenting with ITH in our department to further gain a better understanding of this uncommon clinical presentation. METHODS: We treated seven patients who had VS presenting with ITH between January 2012 and June 2017. All the patients had preoperative computed tomography (CT), computed tomography angiography (CTA), and magnetic resonance imaging(MRI) done which aided in the radiological diagnosis as well as postoperative MRI to confirm the resection extent of the VS. Continuous electrophysiological monitoring of cranial nerves was carried out during surgery. RESULTS: Of the seven patients, three were male and four were female. Their ages ranged from 42 to 71 years (average age, 57.4 years). Two patients reported a history of hypertension. Sudden onset or rapid worsening of clinical symptoms occurred in five patients at time of hemorrhage. The mean diameter of the lesions was 4.1 cm (range, 3.0-5.0 cm). No patient had a pretreatment of stereotactic radiosurgery. Gross total resection was achieved in four cases and subtotal resection in three cases. There were no surgery-related neurological deficits but one patient died 18 days after surgery. Follow-up visits were scheduled at 6 months postoperatively and two patients had tumor recurrence and received stereotactic radiosurgery again. CONCLUSIONS: The incidence of ITH in VS is relatively rare and hypertension may highly correlate with ITH in VS. In comparison with peritumoral adhesion caused by chronic inflammation in multicystic VS with microhemorrhage,ITH caused by acute massive hemorrhage will not increase the extent of peritumoral adhesion immediately. The prognosis of surgery for patients with acute hemorrhagic VS may be better than that for microhemorrhage in multicystic VS. Besides, timely microsurgical treatment is also important to relieve symptoms.


Asunto(s)
Hemorragia/patología , Neuroma Acústico/patología , Adulto , Anciano , Femenino , Hemorragia/diagnóstico por imagen , Hemorragia/etiología , Hemorragia/cirugía , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Neuroma Acústico/complicaciones , Neuroma Acústico/diagnóstico por imagen , Neuroma Acústico/cirugía , Tomografía Computarizada por Rayos X
3.
Zhonghua Yi Xue Za Zhi ; 94(19): 1444-7, 2014 May 20.
Artículo en Zh | MEDLINE | ID: mdl-25143159

RESUMEN

OBJECTIVE: To explore the clinical classification and selection of surgical approaches for cervical spinal dumbbell tumors. METHODS: The clinical data of 87 patients with cervical spinal dumbbell tumors undergoing surgical operations from January 2005 to December 2012 at our hospital were analyzed retrospectively. According to the size of inner and outer parts of tumors and the presence or absence of spinal bone damage, the cervical spinal dumbbell tumors were divided into 4 types of intraspinal predominant (I, n = 48), extraspinal predominant (II, n = 1), intrapinal and extraspinal without damage of spinal bone (III, n = 15) and intrapinal and extraspinal type with damage of spinal bone (IV, n = 7). Different surgical approaches were selected on the basis of tumor classification: posterior median-hemilamina approaches for type I tumors, lateral-muscle gap approaches for type II tumors, ateral-muscle gap-hemilamina or lateral-muscle gap-posterior median-hemilamina approaches for type III tumors, posterior far lateral-muscle gap-hemilamina or posterior median-muscle gap-hemilamina approaches plus posterior occipital cervical or cervical spinal bone graft fusion and internal fixation for type IV tumors. RESULTS: Among them, 83 cases underwent total resection and another 4 subtotal resection in one-stage operation. The postoperative follow-up period had a range of 9 months to 6 years (mean, 3.2 years). There was no recurrence of tumors for total resection and 1 case of tumor recurrence for subtotal resection. During the follow-up period, the clinical manifestations of 85 patients improved while another 2 deteriorated. And there was no occurrence of spinal deformity. CONCLUSION: Clinical classification of cervical spinal dumbbell tumor plays an important guiding role in the selection of surgical approaches. Adopting appropriate surgical approaches based on tumor type can not only improve the rate of total resection of tumor but also reduce the incidence of postoperative spinal deformity.


Asunto(s)
Vértebras Cervicales , Procedimientos Neuroquirúrgicos/métodos , Neoplasias de la Columna Vertebral/cirugía , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Neoplasias de la Columna Vertebral/clasificación , Neoplasias de la Columna Vertebral/patología , Resultado del Tratamiento , Adulto Joven
4.
Int J Neurosci ; 123(10): 691-7, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23550813

RESUMEN

Cerebellar glioblastoma multiforme (CGBM) is rare and its treatment is ill defined. To elucidate prognostic factors, we performed a single institutional review of the largest series to date of CGBM. The West China Hospital database was reviewed from 2007 to June 2011, and a total of 28 CGBM patients were collected. Median age of patients was 50 years old, whereas median Karnofsky Performance Status was 80 (range, 30-100). Brainstem invasion was observed in 9 patients. Sixteen patients received total resection and 12 patients received subtotal resection. Postoperative Gamma Knife radiosurgery (GKRS) was administered to 22 patients. After operation, 16 patients received concurrent GKRS and chemotherapy, and 6 patients received chemotherapy after GKRS. In addition, 4 patients only received chemotherapy, and 2 patients did not receive either GKRS or chemotherapy due to various reasons. Median follow-up period was 13.7 months (range, 5.2-28.1 months). Median overall survival (OS) of 28 patients was 14.3 months and median progression-free survival (PFS) was 9.4 months. Univariate log-rank analysis showed that OS and PFS were significantly related to brainstem invasion (p = 0.03, p = 0.04, respectively), extent of resection (p = 0.02, p = 0.04, respectively) and GKRS (p = 0.01, p = 0.02, respectively) of GBM. Multivariate analysis revealed that OS and PFS were also significantly associated with brainstem invasion (p = 0.007, p = 0.014, respectively), extent of resection (p = 0.032, p = 0.045, respectively) and GKRS (p = 0.031, p = 0.046, respectively) of CGBM. According to our study, brainstem invasion, extent of resection and GKRS were major prognostic factors for survival. Combination of postoperative GKRS and chemotherapy had an improved prognosis, and it may be a feasible postoperative adjuvant treatment of CGBM.


Asunto(s)
Neoplasias Encefálicas/patología , Glioblastoma/patología , Adolescente , Adulto , Factores de Edad , Anciano , Antineoplásicos/uso terapéutico , Antineoplásicos Alquilantes/uso terapéutico , Niño , Dacarbazina/análogos & derivados , Dacarbazina/uso terapéutico , Supervivencia sin Enfermedad , Femenino , Humanos , Estimación de Kaplan-Meier , Estado de Ejecución de Karnofsky , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Invasividad Neoplásica , Procedimientos Neuroquirúrgicos , Pronóstico , Radiocirugia , Estudios Retrospectivos , Factores Sexuales , Análisis de Supervivencia , Temozolomida , Adulto Joven
5.
Nanoscale ; 16(1): 97-109, 2023 Dec 21.
Artículo en Inglés | MEDLINE | ID: mdl-38087978

RESUMEN

Drug resistance has become an obstacle to successful cancer chemotherapies, with therapeutic agents effectively traversing the blood-brain barrier (BBB) remaining a great challenge. A microenvironment responsive and active targeting nanoparticle was constructed to enhance the penetration of drugs, leading to improved therapeutic effects. Dynamic light scattering demonstrated that the prepared nanoparticle had a uniform size. The cRGD modification renders the nanoparticle with active targeting capabilities to traverse the BBB for chemotherapy. The disulfide-bond-containing nanoparticle can be disintegrated in response to a high concentration of endogenous glutathione (GSH) within the tumor microenvironment (TME) for tumor-specific drug release, resulting in more effective accumulation. Notably, the released fisetin further increased the uptake of doxorubicin by glioma cells and exerted synergistic effects to promote apoptosis, induce cellular G2/M cycle arrest, and inhibit cell proliferation and migration in vitro. Moreover, the nanoparticle showed favorable anti-glioma effects in vivo. Our study provides a new strategy to overcome drug resistance by utilizing a natural product to sensitize conventional chemotherapeutics with well-designed targeted nanodelivery systems for cancer treatment.


Asunto(s)
Glioma , Nanopartículas , Humanos , Sistema de Administración de Fármacos con Nanopartículas , Línea Celular Tumoral , Glioma/metabolismo , Sistemas de Liberación de Medicamentos , Doxorrubicina , Glutatión , Microambiente Tumoral
6.
J Control Release ; 354: 155-166, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36538950

RESUMEN

Bromodomain-Containing Protein 4 (BRD4) is a member of the BET family of bromodomains, which participates in gene transcription process and is closely related to tumor progression. We observed the up-regulated expression of BRD4 in colorectal cancer (CRC) after doxorubicin (DOX) treatment, which might be a potential mechanism for DOX resistance. This study constructed the tumor-targeting (cyclo (Arg-Gly-Asp-D-Phe-Lys)-poly(ethylene glycol)-poly(ε-caprolactone)) (cRGD-PEG-PCL) copolymer for co-delivery of DOX and BRD4 PROTAC degrader ARV-825 (ARV-DOX/cRGD-P) for CRC treatment. The ARV-DOX/cRGD-P complexes elicited synergistic anti-tumor effect via cell cycle arrest and the increased cell apoptosis, and mechanism studies implicated the regulation of proliferation- and apoptosis-related pathways in vitro. Moreover, the administration of ARV-DOX/cRGD-P significantly improved anti-tumor activity in subcutaneous colorectal tumors and colorectal intraperitoneal disseminated tumor models in mice by promoting tumor apoptosis, suppressing tumor proliferation and angiogenesis. Taken together, these data reveal that ARV-825 can heighten DOX sensitivity in CRC treatment and BRD4 is a potential therapeutic target for DOX-resistant CRC. The ARV-DOX/cRGD-P preparations have outstanding anti-cancer effects and may be used for clinical treatment of colorectal cancer in the future.


Asunto(s)
Neoplasias Colorrectales , Nanopartículas , Animales , Ratones , Proteínas Nucleares , Línea Celular Tumoral , Quimera Dirigida a la Proteólisis , Proteolisis , Factores de Transcripción/metabolismo , Doxorrubicina/farmacología , Antibióticos Antineoplásicos/uso terapéutico , Neoplasias Colorrectales/tratamiento farmacológico
7.
Chin J Traumatol ; 15(2): 96-9, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22480673

RESUMEN

OBJECTIVE: To analyze the epidemiological features of patients with head injuries in the 2008 Wenchuan earthquake. METHODS: Medical records of patients with head injuries who were admitted to 14 hospitals in Deyang, Mianyang and Chengdu cities after the earthquake were retrospectively analyzed. The patients'age, gender, cause of injury, diagnosis, and outcome were analyzed retrospectively. RESULTS: A total of 1 281 patients with 807 males and 474 females were included. According to Glasgow Coma Scale score at admission, 1 029 patients presented with mild injury, 161 moderate injury and 91 severe injury. The major cause of injuries (83%) was bruise by collapsed buildings. Open head injuries accounted for 60.8%. A total of 720 patients underwent surgical treatment. Good recovery was achieved in 1 056 patients, moderate disability in 106, severe disability in 71, coma in 29 and death in 19. CONCLUSIONS: In this series, male patients were more than female patients. The main cause of injury was hit by falling objects due to building collapse. Minor and open craniocerebral injuries were most common. The epidemiological features of head injuries in Wenchuan earthquake may be helpful to preparation for future rescue.


Asunto(s)
Traumatismos Craneocerebrales , Terremotos , Escala de Coma de Glasgow , Humanos , Estudios Retrospectivos
8.
Acta Pharm Sin B ; 12(6): 2658-2671, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35755286

RESUMEN

Glioma is a primary aggressive brain tumor with high recurrence rate. The poor efficiency of chemotherapeutic drugs crossing the blood‒brain barrier (BBB) is well-known as one of the main challenges for anti-glioma therapy. Moreover, massive infiltrated tumor-associated macrophages (TAMs) in glioma further thwart the drug efficacy. Herein, a therapeutic nanosystem (SPP-ARV-825) is constructed by incorporating the BRD4-degrading proteolytic targeting chimera (PROTAC) ARV-825 into the complex micelle (SPP) composed of substance P (SP) peptide-modified poly(ethylene glycol)-poly(d,l-lactic acid)(SP-PEG-PDLLA) and methoxy poly(ethylene glycol)-poly(d,l-lactic acid) (mPEG-PDLLA, PP), which could penetrate BBB and target brain tumor. Subsequently, released drug engenders antitumor effect via attenuating cells proliferation, inducing cells apoptosis and suppressing M2 macrophages polarization through the inhibition of IRF4 promoter transcription and phosphorylation of STAT6, STAT3 and AKT. Taken together, our work demonstrates the versatile role and therapeutic efficacy of SPP-ARV-825 micelle against glioma, which may provide a novel strategy for glioma therapy in future.

9.
Mater Today Bio ; 16: 100423, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36157053

RESUMEN

Current treatment of glioma is hampered due to the physical blood-brain barrier (BBB) and the resistance to traditional chemotherapeutic agents. Herein, we proposed a combined treatment strategy based on Cyclo (Arg-Gly-Asp-d-Phe-Lys) (cRGDfk) peptides-modified nanoparticle named cRGD-P in a self-assembly method for the co-delivery of doxorubicin (DOX) and BRD4 PROTAC degrader ARV-825 (ARV). Molecular dynamics simulations showed that cRGD-P could change its conformation to provide interaction sites for perfectly co-loading DOX and ARV. The cRGD-P/ARV-DOX exhibited an average size of 39.95 â€‹nm and a zeta potential of -0.25 â€‹mV. Increased expression of BRD4 in glioma cells was observed after being stimulated by cRGD-P/DOX, confirming one of the possible mechanisms of DOX resistance and the synergistic tumor inhibition effect of BRD4 degrading ARV combined with DOX. In the study, the combination of DOX and ARV in the cRGD-P nanoparticle system exhibited synergistic suppression of tumor growth in glioma cells on account of cell cycle arrest in the G2/M phase and the activation of tumor cells apoptosis-related pathways including triggering caspase cascade and downregulating Bcl-2 as well as upregulating Bax. The cRGD-P/ARV-DOX system could effectively suppress the heterotopic and orthotopic growth of glioma by increasing tumor apoptosis, inhibiting tumor proliferation, and decreasing tumor angiogenesis in vivo. Therefore, the cRGD-modified nanoparticle to co-deliver DOX and ARV provides a potential platform for exploiting a more effective and safer combination therapy for glioma.

10.
Mol Vis ; 17: 2920-33, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-22128239

RESUMEN

PURPOSE: To obtain and analyze early retinal changes at the molecular level 24 h after a radiation injury to the ipsilateral intraorbital nerve using gamma knife surgery (GKS), and to examine the morphological changes in bilateral optic nerves. METHODS: Unilateral intraorbital optic nerves of three rhesus macaques were treated by GKS with irradiated doses of 15 Gy, while contralateral optic nerves and retinas served as the control. Gene expression profiles of the control and affected retinas were analyzed with Affymetrix Rhesus Macaque Genome arrays. To verify the results, a quantitative real-time polymerase chain reaction (qRT-PCR) was performed to test the expression patterns of five function-known genes. Morphological changes in the bilateral optic nerves were examined using a transmission electron microscope (TEM) and light microscopy. The glial cell reaction in bilateral optic nerves was studied using immunohistochemistry. RESULTS: Of the probe sets, 1,597 (representing 1,081 genes) met the criteria for differential expression, of which 82 genes were significantly up-or down-regulated in treated retinas. There was prominent upregulation of genes associated with glial cell activation in the treated retina. Genes related to an early inflammatory reaction and to cell death were also significantly regulated in response to a radiation injury to the intraorbital optic nerve. In contrast, the messenger ribonucleic acid (mRNA) expression levels of retinal ganglion cell (RGC)-specific genes were low. Morphologically, cytoplasmic processes of astrocytes in treated nerves were shorter than those of the control and were not straight, while also being accompanied by decreased GFAP immunostaining. More oligodendrocytes and inflammatory cells were apparent in treated nerves than in the control. In addition, swollen mitochondria and slight chromation condensation could be seen in the glial cells of treated nerves. CONCLUSIONS: We conclude that the current irradiated dose of 15 Gy was sufficient to lead to a radiation injury of the optic nerve and retina. Several transcripts deregulated in retinas after a radiation injury play a key role in radiation-induced neurogenic visual loss, especially for genes associated with RGC, glial cell, and cell death. Glial cells in optic nerves might be the primary target of a radiation injury in the optic nerve.


Asunto(s)
Astrocitos/metabolismo , Regulación de la Expresión Génica/efectos de la radiación , Neuroglía/metabolismo , Traumatismos del Nervio Óptico/metabolismo , Nervio Óptico/metabolismo , Células Ganglionares de la Retina/metabolismo , Animales , Astrocitos/citología , Astrocitos/efectos de la radiación , Muerte Celular/efectos de la radiación , Rayos gamma/efectos adversos , Perfilación de la Expresión Génica , Estudio de Asociación del Genoma Completo , Inmunohistoquímica , Macaca mulatta , Masculino , Neuroglía/patología , Neuroglía/efectos de la radiación , Análisis de Secuencia por Matrices de Oligonucleótidos , Nervio Óptico/patología , Nervio Óptico/efectos de la radiación , Traumatismos del Nervio Óptico/genética , ARN Mensajero/análisis , Reacción en Cadena en Tiempo Real de la Polimerasa , Células Ganglionares de la Retina/patología , Células Ganglionares de la Retina/efectos de la radiación
12.
Medicine (Baltimore) ; 99(14): e19631, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32243391

RESUMEN

RATIONALE: Anterior spinal meningoceles are rare neuroanatomic abnormality formed by protrusion of the spinal meninges through a defect in the vertebral column. Presently, therapeutic options for anterior spinal meningoceles are still controversial. The objective of this study is to discuss the individualized management of giant anterior spinal meningoceles. PATIENT CONCERNS AND DIAGNOSES: We analyzed 4 patients with anterior spinal meningoceles between 2007 and 2014 in our department by retrospective chart review, two of whom were anterior sacral meningoceles (ASMs), and another2 were intrathoracic meningoceles (ITMs). INTERVENTIONS AND OUTCOMES: Patients mainly presented with compressive symptoms including rectal irritation, dyspnea (patient 3) and fixed neurologic deficits (patient 4). Three out of 4 patients received surgical treatment, one of which underwent reoperation. After surgery, meningoceles in 1 patient completely disappeared. Two patients acquired the stability of the size of the meningoceles. LESSONS: Management of anterior spinal meningoceles often requires precise treatment based on the different conditions of each patient. Surgical intervention has been proposed for the treatment of symptomatic anterior spinal meningoceles. The goal of surgery is to safely disconnect the linkage between the cyst and CSF from subarachnoid space to prevent further enlargement of the cyst or reaccumulating of cystic fluid.


Asunto(s)
Meningocele/cirugía , Procedimientos Neuroquirúrgicos/métodos , Medicina de Precisión/métodos , Sacro/inervación , Tórax/inervación , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
13.
J Biomed Nanotechnol ; 16(1): 1-13, 2020 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-31996281

RESUMEN

Targeted drug delivery systems have currently demonstrated considerable potential clinical benefits in cancer treatment. Curcumin has become a candidate anti-tumor drug for the therapy of glioblastoma multiforme (GBM) by increasing cell apoptosis and suppressing cell proliferation. In current research, we explored a novel targeted drug delivery system with a self-assembly measure by curcumin, MPEG-PLA and Fa-PEG-PLA. Compared with free curcumin and Cur/MPEG-PLA, Cur/Fa-PEG-PLA can remarkably suppress the growth of GL261 cells and promote apoptotic rate. Moreover, after the procession of tumor-bearing mice with curcumin/Fa-PEG-PLA complex, tumor growth in subcutaneous and intracranial tumor models were repressed via suppressing angiogenesis and facilitating apoptosis in vivo. The Curcumin/Fa-PEG-PLA nanoparticle may be a novel drug for the therapy of GBM.


Asunto(s)
Curcumina , Glioma , Animales , Antineoplásicos , Línea Celular Tumoral , Portadores de Fármacos , Ácido Fólico , Ratones , Micelas , Polietilenglicoles
14.
Int J Nanomedicine ; 14: 7515-7531, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31571861

RESUMEN

BACKGROUND: Glioblastoma mutliforme is the most common and has the poorest prognosis of any malignant tumor of the central nervous system. Luteolin, the most abundant xanthone extracted from vegetables and medicinal plants, has been shown to have treatment effects in various cancer cell types. Luteolin is however, hydrophobic and has poor biocompatibility, which leads to low bioavailability. PATIENTS AND METHODS: In this study, folic acid modifiedpoly(ethylene glycol)-poly(e-caprolactone) (Fa-PEG-PCL) nano-micelles was used to encapsulate the luteolin, creating luteolin loaded PEG-PCL (Lut/Fa-PEG-PCL) micelles to treat glioma both in vitro and in vivo. RESULTS: When compared with the free luteolin and Lut/MPEG-PCL, Lut/Fa-PEG-PCL induced a significant cell growth inhibition and more apoptosis of GL261 cells both in vitro and in vivo. The safety assessment also showed no obvious side effects were observed in mice which were administrated with free luteolin or Lut/MPEG-PCL and Lut/Fa-PEG-PCL. CONCLUSION: These results suggested Lut/Fa-PEG-PCL may be used as an excellent intravenously injectable formulation for the treatment and chemoprevention.


Asunto(s)
Sistemas de Liberación de Medicamentos , Ácido Fólico/química , Glioma/tratamiento farmacológico , Luteolina/uso terapéutico , Nanopartículas/química , Inhibidores de la Angiogénesis/farmacología , Inhibidores de la Angiogénesis/uso terapéutico , Animales , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Liberación de Fármacos , Glioma/irrigación sanguínea , Humanos , Luteolina/farmacocinética , Masculino , Ratones Endogámicos C57BL , Ratones Desnudos , Micelas , Modelos Moleculares , Nanopartículas/ultraestructura , Molécula-1 de Adhesión Celular Endotelial de Plaqueta/metabolismo , Poliésteres/química , Polietilenglicoles/química , Antígeno Nuclear de Célula en Proliferación/metabolismo , Ratas Sprague-Dawley
15.
Clin Pract ; 8(2): 1069, 2018 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-30069301

RESUMEN

Subarachnoid hemorrhage (SAH) is an uncommon complication of systemic lupus erythematosus (SLE). Solitary association of fatal spinal SAH as a complication of SLE, has not been encountered much in literature although coexisting acute cerebral and spinal SAH have been associated with SLE. We present a 39-year old female with initial diagnosis of SLE eight years ago who suddenly developed a productive cough, acute abdomen and paralysis of the lower limbs. Magnetic resonance imaging of the spine revealed thoracic spinal SAH with varying degrees of thoracic spinal cord compression. The hemorrhage was total evacuated via surgery. She regained normal function of her lower limbers after the operation with no further neurological complications. One of the rare but fatal complications of SLE is solitary spinal SAH without cranial involvement. The best and most appropriate management of this kind of presentation is surgical decompression of the hematoma with total hemostasis. The cause of hemorrhage should be identified intra-operatively and treated appropriately.

16.
J Spine Surg ; 4(2): 490-495, 2018 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30069550

RESUMEN

Spinal extradural angiolipomas (SEALs) are extremely extraordinary benign extradural lesions. They are infrequently encountered in normal clinical practice although several authors have report single cases or case series. We present two cases of SEAL which we successfully surgical resected with no further neurological deficits. Our cases comprise of a male and a female with ages ranging from 30 to 60 years. Their principal presenting complains were numbness and pain at the lower extremity with associated fecal and urinary incontinence. In all our cases, MRI revealed extradural spinal lesions that exerted compressive effect on the spinal cord. The male patient had an infiltrating type while the female had non-infiltrating type. We attained total resection in both cases without any further neurological complication. The diagnosis of SEALs initially can be challenging radiologically since they may mimic other spinal lesions. The gold standard treatment modality should always be surgery although total resection may not be achievable in some cases.

17.
J Biomed Nanotechnol ; 14(11): 1866-1882, 2018 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-30165924

RESUMEN

Mangostin is a hydrophobic agent with potential anticancer activity. Molecular dynamics computer simulation indicated methoxy poly(ethylene glycol)-poly(lactide) (MPEG-PLA) and α-mangostin (α-M) have good compatibility. The α-M-loaded nano-particles acting as an anticancer agents against growth of glioma cells were prepared by self-assembly methods. In this study, the effects of α-M-loaded nano-particles, α-M/MPEG-PLA with drug loading of 15% and a mean particle size of 32 nm, on the growth of glioma cells were examined both in vitro and in vivo. The occurrence of changes in the cell signaling molecules and expression levels of various proteins related to cell death and glioma xenograft models (i.e., zebra fish, subcutaneous-mouse and orthotopic-mouse) growth following the administration of α-M/MPEG-PLA were investigated. The novel α-M/MPEG-PLA inhibited the growth of malignant glioma cells, induced cells apoptosis with cleaved caspases expression and DNA fragmentation, along with down-regulation of anti-apoptotic molecules and up-regulation of apoptotic molecules. Furthermore, decreased proliferation as well as vascularization of the tumor in vivo models were significantly achieved. A dramatic induction of programmed cell death was found in malignant glioma cells after treatment with synthetic α-M/MPEG-PLA. These results suggest that synthetic α-M/MPEG-PLA could be a promising novel anticancer agent for performing chemotherapy against malignant glioma.


Asunto(s)
Glioma , Animales , Antineoplásicos , Muerte Celular , Línea Celular Tumoral , Simulación por Computador , Portadores de Fármacos , Ratones , Micelas , Tamaño de la Partícula , Poliésteres , Polietilenglicoles , Xantonas
19.
Medicine (Baltimore) ; 96(11): e6327, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28296753

RESUMEN

INTRODUCTION: This is the first case report about a thoracic intraspinal schwannoma in twin pregnancy with aggressive clinical presentation. CLINICAL PRESENCE AND DIAGNOSES: A 21-year-old woman presented with a 2-month history of back pain and slight lower extremity numbness and weakness, and her symptoms were misdiagnosed as normal reactions to pregnancy until she progressed to complete paralysis and incontinence within 2 weeks. She was then confirmed to have thoracic intraspinal schwannoma through MRI. INTERVENTIONS AND OUTCOMES: Surgery was performed using a unilateral hemilaminectomy approach with a comfortable lateral position during operation. The patient exhibited significant improvements in sensation and muscle strength after surgery. She delivered 2 healthy baby girls by eutocia in her 38th week of pregnancy. LESSONS: The diagnosis of this disease and the 4 possible mechanisms of its aggravated clinical presence are discussed. Intraspinal schwannomas during pregnancy are rare but may cause critical consequences for both the mother and the fetus. Timely diagnosis and multidisciplinary treatment by obstetricians, anesthesiologists, surgeons, oncologists, and neonatologists are essential for the clinical management of this disease.


Asunto(s)
Laminectomía/métodos , Neurilemoma/cirugía , Complicaciones Neoplásicas del Embarazo/cirugía , Embarazo Gemelar , Neoplasias de la Columna Vertebral/cirugía , Femenino , Humanos , Fuerza Muscular , Neurilemoma/diagnóstico , Embarazo , Complicaciones Neoplásicas del Embarazo/diagnóstico , Neoplasias de la Columna Vertebral/diagnóstico , Adulto Joven
20.
World Neurosurg ; 106: 113-119, 2017 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-28377242

RESUMEN

BACKGROUND AND OBJECTIVE: Primary spinal cord (PSC) glioblastoma multiforme (GBM) is extremely rare and accounts for only 1.5% of all spinal cord tumors. Therefore, its treatment is still ill defined. To elucidate prognostic factors, we performed a single-institutional retrospective review of the largest series to date of patients with PSC GBM who underwent surgical resection in West China Hospital between 2008 and 2014. A total of 14 patients with PSC GBM were reviewed. METHODS: Demographic, operative, and postoperative factors were recorded. Overall survival (OS) and progression-free survival (PFS) were calculated and compared with the Kaplan-Meier method. RESULTS: Eight males (57%) and 6 females (43%) were involved in the study. Their median age was 28 years (range, 14-56 years). Median Karnofsky Performance Status score was 60 (range, 20-90). Four patients (28.6%) received gross total resection, 5 (35.7%) partial resection, and the remaining 5 (35.7%) biopsy only. Nine patients (64.3%) received postoperative radiotherapy and chemotherapy, 3 (21.4%) chemotherapy only, and 2 (14.3%) neither. Median follow-up period was 15 months (range, 5-26 months). One-year and 2-year survival was 78.5% (11/14) and 7.1% (1/14), respectively. Median OS was 15 months, and median PFS 8 months. Univariate log-rank analysis showed that OS and PFS were significantly associated with patients' age (P = 0.007 and P = 0.04, respectively) and postoperative radiotherapy (P = 0.001 and P = 0.002, respectively). However, preoperative Karnofsky Performance Status score affected only OS and did not affect PFS (P = 0.033 and P = 0.106, respectively). CONCLUSIONS: According to our study, the combination of postoperative radiotherapy and temozolomide chemotherapy can improve prognosis and may serve as a feasible postoperative adjuvant treatment of PSC GBM.


Asunto(s)
Glioblastoma/cirugía , Neoplasias de la Médula Espinal/cirugía , Adolescente , Adulto , Antineoplásicos Alquilantes/uso terapéutico , Terapia Combinada , Dacarbazina/análogos & derivados , Dacarbazina/uso terapéutico , Femenino , Glioblastoma/tratamiento farmacológico , Glioblastoma/radioterapia , Humanos , Estado de Ejecución de Karnofsky , Laminectomía/métodos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Neoplasias de la Médula Espinal/tratamiento farmacológico , Neoplasias de la Médula Espinal/radioterapia , Temozolomida , Resultado del Tratamiento , Adulto Joven
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