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1.
Sex Med Rev ; 11(3): 224-230, 2023 06 27.
Artigo em Inglês | MEDLINE | ID: mdl-37132049

RESUMO

INTRODUCTION: COVID-19 (coronavirus disease 2019), caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), has significantly affected global health. Research has shown that the virus can be found at high concentrations in male gonadal tissue. Yet, the virus's long-term implications on male reproductive health remains relatively unclear. OBJECTIVE: A comprehensive narrative review of published literature regarding COVID-19's short- and long-term implications on male reproductive health. METHODS: A literature search of the PubMed and EMBASE databases was performed for articles ranging from November 2019 to August 2022. Studies that focused on the impact of COVID-19 on male reproductive health were selected for review. Studies were included if they were written in English and reported semen analyses, pathologic gonadal tissue analyses, serum androgen assays, or a combination of these in patients with COVID-19. Moreover, literature was included on COVID-19 vaccinations' impacts on male reproductive health. Case reports and other narrative reviews were excluded from this review. RESULTS: SARS-CoV-2 has been detected in cadaveric testicular tissue during the initial stages of infection in fatal cases of the disease, demonstrating marked inflammatory changes and decreased spermatogenesis in patients with COVID-19. Several studies have revealed a negative impact on androgens during acute illness and in the ensuing months, but data on the recovery of androgen levels are confounding and limited in scope. COVID-19 does have significant negative impacts on bulk semen parameters, as confirmed in studies comparing pre- and post-COVID-19 semen samples. Vaccination is a valuable tool for protecting patients from the negative impacts of the virus and has been shown to have no negative impact on male reproductive potential. CONCLUSION: Given the virus's impacts on testicular tissue, androgens, and spermatogenesis, COVID-19 can negatively affect male reproductive health for an extended period. Therefore, vaccinations should continue to be recommended to all eligible patients.


Assuntos
COVID-19 , Humanos , Masculino , SARS-CoV-2 , Androgênios , Saúde Reprodutiva , Sêmen
2.
Sex Med Rev ; 9(2): 230-235, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33341426

RESUMO

INTRODUCTION: Peyronie's disease (PD) is an acquired wound-healing disorder of the penis involving fibrosis and scar formation within the tunica albuginea that can lead to various penile deformities resulting in penile pain, sexual dysfunction, low self-esteem, and emotional distress. While many studies highlight the psychosocial impact of PD on the patient, little is known about the female partner's experience regarding PD and its management. OBJECTIVES: To evaluate and summarize the available clinical data on the effects of the disease and its management on female sexual partners of patients with PD. METHODS: A search of the available medical literature using the MEDLINE and PubMed databases was performed. The queried terms included the following: Peyronie's disease, partner, female, dyspareunia, relationship, satisfaction, survey, and outcome. Studies were included only if the female sexual partners were directly evaluated or interviewed. RESULTS: PD can have a significant impact on the sexual function and satisfaction of female sexual partners. Most female sexual partners reported an improvement in their relationship, a decrease in sexual dysfunction, and improved overall satisfaction after both surgical and nonsurgical treatment. CONCLUSION: PD can be emotionally debilitating for patients and their partners. It has been associated with depression, social stigmatization, isolation, diminished self-worth, and avoidance of intimacy. A partner's experience with PD, as well as its management and outcomes, is an understudied entity that warrants further investigation and may be useful in guiding future treatment approaches. Kern T, Ye N, Abdelsayed GA. Peyronie's Disease: What About the Female Sexual Partner?. Sex Med Rev 2021;9:230-235.


Assuntos
Induração Peniana , Disfunções Sexuais Fisiológicas , Feminino , Humanos , Masculino , Induração Peniana/terapia , Pênis , Comportamento Sexual , Parceiros Sexuais
3.
J Sex Med ; 16(11): 1820-1826, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31501060

RESUMO

INTRODUCTION: Surgery remains the gold standard for the correction of penile deformities secondary to Peyronie's disease (PD). Nevertheless, there is no published data on the surgical treatment of PD in older men. AIM: Considering the aging national and international population, we sought to evaluate the pre-operative characteristics and surgical outcomes of men aged 65 or older who underwent surgical treatment for PD at our tertiary care institution. METHODS: We retrospectively reviewed the charts of all men 65 years or older who underwent surgery for PD from January 2010 to September 2017. We compared men who underwent penile prosthesis implantation with straightening maneuvers (PP+SMs), tunica albuginea plication (TAP), and plaque partial excision with grafting (PEG). MAIN OUTCOME MEASURE: The main objective of this study was to find the baseline pre-operative patient characteristics and postoperative patient-reported outcomes. RESULTS: A total of 86 men with a median age of 68 years underwent surgery during the study period. 39 men underwent PP+SM (45%), 25 men a TAP (29%), and 22 men a PEG (26%). The mean curvature for all men was 59.9 ± 22.0° (range 0-105°). Those who underwent a PEG had a mean ± SD degree of curvature of 78.6 ± 16.6°, significantly higher than those who underwent PP+SM or TAP (49.1 ± 20.2° and 61.4 ± 17.4°, respectively; P < .001). Moreover, men who underwent a PEG had significantly more complex penile deformities (eg, narrowing with hinge effect) and better reported baseline erectile function compared with men who underwent PP+SM or TAP. Overall, 95% of all men reported having a functionally straight penis postoperatively with 94% engaging in penetrative intercourse at last follow-up. Overall, patient-reported satisfaction was 85% with a median follow-up of 43.5 months. CLINICAL IMPLICATIONS: Our findings suggest that the surgical treatment of PD in older men is safe, effective, and associated with high patient satisfaction. Although this represents a surgical series susceptible to selection bias, it underscores the importance of patient selection and counseling in achieving good surgical outcomes. STRENGTHS & LIMITATIONS: Our study is the first to report on outcomes of surgical treatment of PD in an elderly patient population with relatively long-term follow-up. Our limitations include a small sample size, single operating surgeon, and the lack of a younger comparison group. CONCLUSION: Despite an aging global population, surgery remains a viable and reliable option for the properly selected and counseled older men with PD. Abdelsayed GA, Setia SA, Levine LA. The Surgical Treatment of Peyronie's Disease in the Older Man: Patient Characteristics and Surgical Outcomes in Men 65 and Older. J Sex Med 2019;16:1820-1826.


Assuntos
Satisfação do Paciente , Implante Peniano , Induração Peniana/cirurgia , Pênis/cirurgia , Idoso , Idoso de 80 Anos ou mais , Aconselhamento , Humanos , Masculino , Seleção de Pacientes , Ereção Peniana/fisiologia , Induração Peniana/fisiopatologia , Período Pós-Operatório , Estudos Retrospectivos , Resultado do Tratamento
4.
Urology ; 129: 113-118, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-30914333

RESUMO

OBJECTIVE: To compare outcomes between hemostatic patches (HP) versus pericardium allografts (PA) for complex Peyronie's disease with erectile dysfunction managed with inflatable penile prosthesis (IPP) and plaque incision and grafting (PIG). METHODS: We reviewed all men who underwent IPP with PIG for PD at our institution (4/2010-9/2018). PIG was performed via relaxing tunical incisions during IPP implantation following manual modeling if there was persistent curve >30° and/or significant narrowing. Tunical defects >2 cm were grafted. PA (Coloplast, Minneapolis, MN) or HP consisting of either Evarrest, Nu-Knit (Ethicon Inc., Somerville, NJ), or TachoSil (Baxter Int., Deerfield, IL) were used. RESULTS: HP was placed in 18 men (n = 10 Evarrest, n = 6 Nu-Knit, and n = 2 TachoSil), 15 had PA. There was no difference in mean age, preoperative curvature (HP:75° vs PA:78°), or grafted area (HP:11.9 cm2 vs PA:10.9 cm2) between HP and PA cohorts. Mean operative time was shorter for HP (122 vs 166 minutes, P = .01). Median follow-up: 6.6 months (range: 2-27 months) for HP and 34.6 months (range: 13-103 months) for PA. Residual curvature >20° was present following HP in 16.7% (n = 3) and PA in 13.3% (n = 2; P = 1.0). There were no complications attributable to HP/PA material and no IPP herniation through the tunical defect. Postoperatively, 94.4% (n = 17) of HP and 93.3% (n = 14) of PA patients were engaged in penetrative intercourse (P = 1.0). CONCLUSION: HP are effective materials to cover the tunical defect over an IPP following plaque incision for PD. HP outcomes are similar to PA, while operative time is shorter for HP.


Assuntos
Disfunção Erétil/cirurgia , Hemostáticos/farmacologia , Satisfação do Paciente , Induração Peniana/terapia , Prótese de Pênis , Pericárdio/transplante , Procedimentos Cirúrgicos Urológicos Masculinos/métodos , Aloenxertos , Combinação de Medicamentos , Disfunção Erétil/etiologia , Disfunção Erétil/fisiopatologia , Fibrinogênio/farmacologia , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Induração Peniana/complicações , Induração Peniana/fisiopatologia , Pênis/cirurgia , Estudos Retrospectivos , Tampões de Gaze Cirúrgicos , Trombina/farmacologia
5.
J Sex Med ; 15(9): 1212-1215, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30126799
6.
J Robot Surg ; 12(4): 679-685, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29556868

RESUMO

To compare perioperative outcomes in the three most common partial nephrectomy modalities: robotic (RPN), laparoscopic (LPN), and open (OPN), matched for nephrometry scores. Patients aged 16-85 who underwent RPN, LPN, or OPN from 2007 to 2014 for localized renal carcinoma within our healthcare system were enrolled. Age, sex, body mass index, and Charlson Comorbidity Index (CCI) as well as perioperative outcomes of estimated blood loss (EBL), length of hospital stay (LOS), ischemia time (IT), change in eGFR, positive margin rate, operative time (OT), and emergency room visit rates were compared between RPN, LPN, and OPN using the R.E.N.A.L nephrometry score. A total of 862 patients underwent partial nephrectomy (523 LPN, 176 OPN, and 163 RPN). Patients who underwent OPN were significantly older, and had higher nephrometry scores and CCI. When matched for nephrometry scores, minimally invasive (LPN and RPN) compared to OPN had lower EBL (< 0.0001), shorter LOS (< 0.0001), shorter IT (< 0.001), and less change in eGFR (< 0.001), particularly in nephrometry scores higher than 8 (0.0099). Comparing RPN with LPN, RPN had significantly shorter OT in all nephrometry scores (< 0.001); shorter IT and LOS in nephrometry scores higher than 7. Our study suggests that minimally invasive partial nephrectomy may have superior outcomes to OPN when matched by nephrometry scores, particularly at higher scores and for RPN. This finding may contribute to a surgeon's decision in the approach to partial nephrectomy.


Assuntos
Carcinoma de Células Renais/cirurgia , Neoplasias Renais/cirurgia , Laparoscopia/métodos , Nefrectomia/métodos , Procedimentos Cirúrgicos Robóticos/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Perda Sanguínea Cirúrgica , Índice de Massa Corporal , Feminino , Taxa de Filtração Glomerular , Humanos , Tempo de Internação , Masculino , Margens de Excisão , Pessoa de Meia-Idade , Duração da Cirurgia , Índice de Gravidade de Doença , Resultado do Tratamento , Adulto Jovem
7.
J Sex Med ; 15(3): 410-415, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29339015

RESUMO

BACKGROUND: Currently the Ambicor is the only 2-piece inflatable penile prosthesis (IPP) available in the United States. By eliminating the separate reservoir, this provides certain advantages for patient and surgeon. Nevertheless, it composes a small percentage of all IPPs implanted in the United States. AIM: To detail the surgical technique for implantation, describe the ideal patient candidates best suited for the Ambicor, and discuss the most common and some rare complications with a review of the available published literature in combination with our clinical experience. METHODS: A PubMed literature search was performed to obtain all peer-reviewed articles published in English specifically on the Ambicor 2-piece IPP. We also reviewed our clinical experience with the Ambicor during the past 2 decades. RESULTS: The published data remain limited, because few articles on the Ambicor have been published in the past 10 years. Overall complication rates were 2.1% to 9.5%. Patient satisfaction rates were 75% to 96.4%, with similar partner satisfaction rates. Relative contraindications for implantation include patients with significant penile deformities, long narrow phalluses, or short phalluses. STRENGTHS AND LIMITATIONS: Despite the limited available published data with short follow-up periods, this review provides a comprehensive discussion on the technical aspects and relevant perioperative counseling recommended for Ambicor implantation. CONCLUSION: The prosthetic urologist should offer the Ambicor 2-piece IPP to patients with erectile dysfunction whose non-surgical treatment has failed. Certain implanters might want to avoid the blind retropubic reservoir placement that occurs with 3-piece IPPs and might not be comfortable with an ectopic approach and therefore prefer using a 2-piece device. We believe the ideal Ambicor candidate is a patient with a current or future pelvic organ transplant, decreased manual dexterity, in need of complete phallic reconstruction, or with known extensive prior abdominopelvic surgery. Abdelsayed GA, Levine LA. Ambicor 2-Piece Inflatable Penile Prosthesis: Who and How? J Sex Med 2018;15:410-415.


Assuntos
Disfunção Erétil/cirurgia , Implante Peniano/métodos , Prótese de Pênis , Humanos , Masculino , Satisfação do Paciente , Pênis/cirurgia , Desenho de Prótese , Cirurgiões , Urologistas
8.
World J Urol ; 36(1): 21-26, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29086019

RESUMO

PURPOSE: Robotic radical prostatectomy focuses on oncologic cure, urinary continence and sexual function recovery. However, little is known about the effect of declines in urinary continence and sexual function on healthcare utilization. We aim to identify these factors. MATERIALS AND METHODS: From March 2011 to September 2013, all men undergoing robotic prostatectomy within our healthcare system were enrolled. Men completed the expanded prostate cancer index composite-26 survey at the time of diagnosis and 90 days post-operatively. Patients were stratified according to change in scores in the sexual function and urinary incontinence domains. Patient, treatment and post-op utilization patterns were examined for association with the extent of decline in sexual function and urinary continence. Multivariate linear regression was used to identify factors independently associated with decline in continence and sexual function. RESULTS: A total of 411 men who completed the baseline survey and at 90 days postoperatively were included. On multivariate linear regression, younger age (p < 0.01), higher preoperative sexual function (< 0.01), single marital status (p = 0.04) and more post-surgery email contacts (p = 0.04) were associated with higher declines in sexual function. For continence, no family history of prostate cancer (p = 0.01), higher baseline continence (p < 0.01) and more post-surgery physical therapy visits (p < 0.01) were associated with higher declines. CONCLUSIONS: Patients with the poorest quality of life outcomes at 90 days post-operatively were more likely to seek care via email and physical therapy encounters related to sexual function and urinary incontinence, respectively. This suggests that maximizing post-treatment quality of life can potentially reduce healthcare utilization.


Assuntos
Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Prostatectomia/métodos , Qualidade de Vida , Recuperação de Função Fisiológica , Procedimentos Cirúrgicos Robóticos , Comportamento Sexual/fisiologia , Micção/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
9.
Perm J ; 21: 16-138, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28488986

RESUMO

INTRODUCTION: The association between cigarette smoking and erectile dysfunction has been well established. Studies demonstrate improvements in erectile rigidity and tumescence as a result of smoking cessation. Radical prostatectomy is also associated with worsening of erectile function secondary to damage to the neurovascular bundles. To our knowledge, no previous studies have examined the relationship between smoking cessation after prostate cancer diagnosis and its effect on sexual function following robotic prostatectomy. We sought to demonstrate the utility of a smoking cessation program among patients with prostate cancer who planned to undergo robotic prostatectomy at Kaiser Permanente Southern California. METHODS: All patients who underwent robotic prostatectomy between March 2011 and April 2013 with known smoking status were included, and were followed-up through November 2014. All smokers were offered the smoking cessation program, which included wellness coaching, tobacco cessation classes, and pharmacotherapy. Patients completed the Expanded Prostate Cancer Index Composite-26 (EPIC-26) health-related quality-of-life (HR-QOL) survey at baseline and postoperatively at 1, 3, 6, 12, 18, and 24 months. There were 2 groups based on smoking status: Continued smoking vs quitting group. Patient's age, Charlson Comorbidity Score, body mass index, educational level, median household income, family history of prostate cancer, race/ethnicity, language, nerve-sparing status, and preoperative/postoperative clinicopathology and EPIC-26 HR-QOL scores were examined. A linear regression model was used to predict sexual function recovery. RESULTS: A total of 139 patients identified as smokers underwent the smoking cessation program and completed the EPIC-26 surveys. Fifty-six patients quit smoking, whereas 83 remained smokers at last follow-up. All demographics and clinicopathology were matched between the 2 cohorts. Smoking cessation, along with bilateral nerve-sparing status, were the only 2 modifiable factors associated with improved sexual function after prostatectomy (6.57 points, p = 0.0226 and 8.97 points, p = 0.0485, respectively). CONCLUSION: In the setting of robotic prostatectomy, perioperative smoking cessation is associated with a significant improvement in long-term sexual functional outcome when other factors are adjusted.


Assuntos
Disfunção Erétil/epidemiologia , Prostatectomia/estatística & dados numéricos , Neoplasias da Próstata/cirurgia , Recuperação de Função Fisiológica , Abandono do Hábito de Fumar/estatística & dados numéricos , Fumar/epidemiologia , California , Disfunção Erétil/terapia , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias da Próstata/epidemiologia , Robótica , Fumar/terapia
10.
J Endourol ; 31(1): 38-42, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27806631

RESUMO

PURPOSE: A skilled assistant surgeon is presumed necessary during robot-assisted partial nephrectomy (RAPN) to minimize warm ischemia time (WIT) and to facilitate complex renorrhaphy. Studies observing impact of resident participation have focused on robotic prostatectomies, showing no impact on core surgical outcomes. Herein, we evaluated the level of experience of the bedside assistant and its impact on perioperative outcomes in RAPN. MATERIALS AND METHODS: All RAPN cases in our healthcare system from January 2011 to December 2013 were retrospectively reviewed. The cases were divided into teaching and nonteaching hospitals. There were 18 fellowship-trained attending surgeons. At teaching hospitals, surgeries were performed by an attending physician and postgraduate year (PGY)-2 or PGY-3 resident at bedside; at nonteaching hospitals, surgeries were performed by two attending surgeons. We compared age, gender, body mass index, Charlson comorbidity index, operative difficulty by R.E.N.A.L. nephrometry score, and operative outcomes (WIT, estimated blood loss, operative time (OT), positive margin rate, length of stay (LOS), postoperative glomerular filtration rate, and readmission rate). RESULTS: Of the 170 patients captured, 162 had R.E.N.A.L. nephrometry score and WIT: 112 from teaching hospitals and 50 from nonteaching hospitals. Patient characteristics were equivalent between both cohorts with the exception of the R.E.N.A.L. score, which was higher (6.3 vs 5.7, p = 0.046) in the teaching hospitals cohort. Regarding operative outcomes, we noted an overall increase in LOS by 1 day (p = 0.001) and OT by 16 minutes (p = 0.011) in the teaching hospitals. CONCLUSION: We observed that increased LOS was the only clinically relevant measure negatively impacted by resident physician involvement during RAPN.


Assuntos
Nefrectomia/educação , Nefrologia/educação , Procedimentos Cirúrgicos Robóticos/educação , Cirurgiões , Adulto , Idoso , Feminino , Taxa de Filtração Glomerular , Hospitais de Ensino , Humanos , Neoplasias Renais/cirurgia , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Nefrectomia/métodos , Duração da Cirurgia , Readmissão do Paciente , Estudos Retrospectivos , Resultado do Tratamento , Isquemia Quente
11.
Urology ; 85(6): 1224-8, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25681835

RESUMO

Tumors of the anterior prostate (ie, the portion of the prostate anterior to the urethra) account for approximately 20% of all prostate cancers. Although anterior prostate cancers frequently occur, they have historically been underdetected because of infrequent sampling. Recent advances in multiparametric magnetic resonance imaging and improved biopsy schemes have significantly increased our diagnostic accuracy for detecting anterior tumors. Herein, we review these developments and highlight key aspects of the diagnosis and management of anterior prostate cancers.


Assuntos
Neoplasias da Próstata/patologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Prostatectomia , Neoplasias da Próstata/cirurgia
12.
BJU Int ; 111(4 Pt B): E167-72, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23035696

RESUMO

OBJECTIVE: To develop a model that integrates the clinical and pathological information prior to radical cystectomy to increase the accuracy of current clinical stage in prediction of pathological stage in patients with bladder cancer (BC) using a modelling approach called principal component analysis (PCA). PATIENTS AND METHODS: In a single-centre retrospective study, demographic and clinicopathological information of 1186 patients with clinically organ-confined (OC) BC was reviewed. Putative predictors of post-cystectomy pathological stage were identified using a stepwise logistic regression model. Patients were randomly divided into training data set (two-thirds of the study population, 790 patients) and test data set (one-third of the study population, 396 patients). The PCA method was used to develop the model in the training data set and the cut-off point (PCA score) to differentiate pathological OC disease from extravesical disease was determined. The model was then applied to the test data set without recalculation. RESULTS: In all, 685 patients (57.7%) had pathological OC disease. Age, clinical stage, number of intravesical treatments, lymphovascular invasion, multiplicity of tumours, hydronephrosis and palpable mass were incorporated into the PCA model as predictors of pathological stage. The sensitivity and specificity of the PCA model in the test data set were 62.8% (95% CI 55.6%-68.1%) and 68.9% (95% CI 60.8%-76.0%), respectively. The positive and negative predictive values were 75.8% (95% CI 69.0%-81.6%) and 51.5% (95% CI 44.4%-58.5%), respectively. CONCLUSIONS: The pre-cystectomy PCA model improved the ability to differentiate OC disease from extravesical BC and especially decreased the under-staging rate. The pre-cystectomy PCA model represented a user-friendly staging aid without the need for sophisticated statistical interpretation.


Assuntos
Carcinoma de Células de Transição/patologia , Cistectomia , Estadiamento de Neoplasias/métodos , Cuidados Pré-Operatórios/métodos , Análise de Componente Principal , Neoplasias da Bexiga Urinária/patologia , Idoso , Carcinoma de Células de Transição/cirurgia , Feminino , Humanos , Masculino , Valor Preditivo dos Testes , Estudos Retrospectivos , Neoplasias da Bexiga Urinária/cirurgia
13.
J Trauma ; 68(4): 881-5, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20386283

RESUMO

BACKGROUND: The purpose of this study was to analyze the association of the initial platelet count with mortality and progression of intracranial hemorrhage (ICH) in blunt traumatic brain injured (TBI) patients. METHODS: All blunt trauma patients with severe TBI admitted from January 2006 to December 2007 were retrospectively identified. Patients with a chest, abdomen, or extremity AIS score >3 were excluded to minimize the impact of concomitant injuries on the outcomes of the patients. All brain computed tomography scans were reviewed to analyze ICH progression. Discrete platelet cutoff values were entered into a multiple regression model to detect critical thresholds associated with ICH progression and mortality. RESULTS: Of 626 TBI patients, 310 (49.5%) had a minimum of two brain computed tomography scans and were able to have ICH progression evaluated. Patients with platelets <175,000/mm3 had a significantly increased risk for ICH progression (OR [95% CI]: 2.09 [1.07-4.37]; adjusted p = 0.043). ICH progression was associated with increased need for craniotomy (OR [95% CI]: 3.27 [1.28-8.33]; adjusted p = 0.013) and mortality (OR [95% CI]: 3.41 [1.11-10.53]; adjusted p = 0.033). A platelet count <100,000/m3 was an independent predictor for mortality (OR [95% CI]: 9.5 [1.3-71.4]; adjusted p = 0.029). CONCLUSION: A platelet count <100,000/mm3 is associated with a ninefold adjusted risk of death, and a platelet count <175,000/mm3 is a significant predictor of ICH progression. The impact of early correction of the admission platelet count warrants further validation.


Assuntos
Plaquetas/fisiologia , Hemorragia Intracraniana Traumática/sangue , Hemorragia Intracraniana Traumática/fisiopatologia , Adulto , Distribuição de Qui-Quadrado , Progressão da Doença , Feminino , Humanos , Escala de Gravidade do Ferimento , Hemorragia Intracraniana Traumática/diagnóstico por imagem , Hemorragia Intracraniana Traumática/mortalidade , Masculino , Contagem de Plaquetas , Valor Preditivo dos Testes , Análise de Regressão , Estudos Retrospectivos , Fatores de Risco , Sensibilidade e Especificidade , Tomografia Computadorizada por Raios X
14.
Curr Alzheimer Res ; 5(3): 288-307, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18537544

RESUMO

Targeting the initial formation of amyloid assemblies is a preferred approach to therapeutic intervention in amyloidoses, which include such diseases as Alzheimer's, Parkinson's, Huntington's, etc., as the early-stage, oligomers that form before the development of beta-conformation-rich fibers are thought to be toxic. X-ray patterns from amyloid assemblies always show two common intensity maxima: one at 4.7 A corresponding to the hydrogen-bonding spacing between the beta-chains, and the other at approximately 10 A corresponding to the spacing between beta-pleated sheets. We report here the application of fiber x-ray diffraction to monitor these structural indicators of amyloid fiber assembly in the presence of small, aromatic molecules, some of which have been assessed by other techniques as being inhibitory. The compounds included butylated hydroxytoluene, chloramphenicol, cotinine, curcumin, diphenylalanine (FF), ethyl 3-aminobenzoate methane sulfonate, hexachlorophene, melatonin, methylpyrrolidine, morin, nicotine, phenolphthalaine, PTI-00703 (Cat's claw), pyridine, quinine, sulfadiazine, tannic acid, tetracaine, tetrachlorosalicylanilide, and tetracycline. Their effects on the aggregation of Abeta1-40, Abeta11-25, Abeta12-28, Abeta17-28, Abeta16-22, and Abeta16-22[methylated] analogues were characterized in terms of the integral widths and integrated intensities of the two characteristic reflections. Peptide Abeta11-25 with or without small molecules showed varying relative intensities but similar coherent lengths of 28-49 A in the intersheet and 171-221 A in the H-bonding directions. PTI-00703, however, abolished the H-bonding reflection. Among previously reported aromatic inhibitors for Abeta11-25, PTI-00703, tannic acid, and quinine were more effective than curcumin, morin, and melatonin based on the criterion of crystallite volume. For the N-methylated and control samples, there were no substantial differences in spacings and coherent lengths; however, the relative volumes of the beta-crystallites, which were calculated from the magnitude of the intensities, decreased with increase in concentration of Abeta16-22Me. This may be accounted for by the binding of Abeta16-22Me to the monomer or preamyloid oligomer of Abeta16-22. The fiber diffraction approach, which can help to specify whether an amyloidophilic compound acts by impeding hydrogen-bonding or by altering intersheet interactions, may help provide a rationale basis for the development of other therapeutic reagents.


Assuntos
Peptídeos beta-Amiloides/efeitos dos fármacos , Hidrocarbonetos Aromáticos/farmacologia , Fragmentos de Peptídeos/efeitos dos fármacos , Estrutura Secundária de Proteína/efeitos dos fármacos , Difração de Raios X , Peptídeos beta-Amiloides/química , Fragmentos de Peptídeos/química , Dobramento de Proteína
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