80 results on '"Jackson BJ"'
Search Results
2. Abstract 47
- Author
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Fischer, John P, primary, Shang, ES, additional, Wingate, NW, additional, Wink, JW, additional, Nelson, JN, additional, Woo, EW, additional, Jackson, BJ, additional, Kovach, SJ, additional, and Kanchwala, SK, additional
- Published
- 2013
- Full Text
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3. Bayley Scales of Infant Development Screening Test-gross motor subtest: efficacy in determining need for services.
- Author
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Jackson BJ, Needelman H, Roberts H, Willet S, and McMorris C
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- 2012
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4. Building a system of child find through a 3-tiered model of follow-up.
- Author
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Jackson BJ and Needelman H
- Abstract
Developmental TIPS (Tracking Infants Progress Statewide) is a project that performs statewide developmental follow-up of infants from the major neonatal intensive care units throughout Nebraska. Developmental TIPS enrolls infants who were in the neonatal intensive care unit for at least 48 hours, regardless of the child's perceived risk for neurodevelopmental disability. The goals of this program of developmental tracking are to standardize the system of follow-tip in the state and to gather outcome data on this population of young children. This project supports parent-child interactions and promotes the child's health and safety within the context of universal screening and monitoring. It is a collaborative project among hospitals, the Nebraska Department of Education, the Nebraska Health and Human Services Division, local health and education providers, and families. The results suggest a high rate of referrals for low-, moderate-, and high-risk infants. This follow-up) system has helped to support the Child Find efforts of the state by providing ongoing screening that maximizes early identification of developmental problems. The purpose of this article is to describe this comprehensive follow-up model that is an integral part of the state Child Find system and to report on the children being followed. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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5. Plasma enalapril levels and hormonal effects after short- and long-term administration in essential hypertension.
- Author
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Johnston, CI, Jackson, BJ, Larmour, I, Cubella, R, and Casley, D
- Abstract
Enalapril lowers blood pressure both acutely and during long-term therapy in patients with essential hypertension. After a single 10 mg dose of enalapril a close relationship between plasma enalaprilic acid (MK-422) levels, angiotensin converting enzyme (ACE) inhibition and the acute hypotensive and hormonal effects was demonstrated. During long- term administration of enalapril, a similar relationship between the plasma enalaprilic acid level, ACE inhibition and the hypotensive effect was shown, although the dose-response curve for plasma enalaprilic acid to ACE inhibition was displaced to the right compared to the acute dose-response curve. Several weeks' administration of enalapril was needed to reach stable plateau levels of plasma enalaprilic acid and ACE inhibition. During long-term treatment with enalapril in essential hypertension, there was sustained inhibition of ACE and the associated hormonal changes. [ABSTRACT FROM AUTHOR]
- Published
- 1984
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6. Effective denture stabilization in an atrophic mandible.
- Author
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Jackson BJ
- Published
- 2012
7. Laryngotracheal Resection After B-Raf Proto-oncogene Inhibition for Anaplastic Thyroid Carcinoma.
- Author
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Kent J, Erwin P, Haraf D, Liao CY, Durham J, Angelos P, Agrawal N, Baird BJ, and Madariaga MLL
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- Humans, Proto-Oncogene Proteins B-raf genetics, Imidazoles therapeutic use, Pyridones therapeutic use, Antineoplastic Combined Chemotherapy Protocols, Mutation, Thyroid Carcinoma, Anaplastic drug therapy, Thyroid Carcinoma, Anaplastic genetics, Thyroid Carcinoma, Anaplastic surgery, Thyroid Neoplasms drug therapy, Thyroid Neoplasms genetics, Thyroid Neoplasms surgery
- Abstract
Anaplastic thyroid carcinoma is a rare but aggressive neoplasm that often presents as advanced inoperable disease. Patients with B-Raf proto-oncogene (BRAF) v600e mutated anaplastic thyroid carcinoma who receive neoadjuvant dabrafenib/trametinib have improved rates of microscopically margin-negative resection and durable locoregional control. However this has not been evaluated in the setting of tracheal resection and primary reconstruction. Here we demonstrate the safety and efficacy of laryngotracheal resection and reconstruction after dabrafenib/trametinib for locoregionally advanced BRAF v600e mutated anaplastic thyroid carcinoma., (Copyright © 2023 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
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8. Drug use and associated factors in a North Eastern region of Tanzania: a cross-sectional study.
- Author
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Ndumwa HP, Munishi C, Ngowi JE, Njiro BJ, Mabusi M, Suhartono S, Busse A, Campello G, Garofalo G, Cipolla P, Nyandindi C, Ubuguyu O, and Sunguya B
- Subjects
- Male, Humans, Cross-Sectional Studies, Tanzania, Rural Population, Substance-Related Disorders epidemiology
- Abstract
Introduction: Tanzania has experienced an increase in the number of people who use drugs (PWUDs) and people who inject drugs (PWIDs). Understanding the characteristics of PWUDs is crucial to addressing the increasing burden of drug use in Tanzania. This study was set to examine drug use and its related factors among PWUDs in a North Eastern region of Tanzania., Methods: a cross-sectional study conducted among 481 PWUDs in Tanga region, Tanzania. R statistical language was used for analysis and plotting. Logistic regression was performed to establish associations between knowledge and practice scores with drug use. A p-value of < 0.05 was considered statistically significant., Results: people who inject drugs comprised mostly of male (97.5%) and those with primary level education (71.1%). About three in four PWUDs had poor knowledge and practices towards drug use. Factors associated with adequate knowledge and practices towards drug use included residing in urban setting (aOR: 0.47, 95% CI; 0.29 - 0.74, p=0.001) while low level of education and use of drugs for less than 10 years were independent predictors for poor practices., Conclusion: drug use poses a significant threat among male and individuals with low education in Tanga region. Poor knowledge and practices towards drug use was more pronounced among rural and lowly educated PWUDs. Owing to variabilities of predictors, tailored and innovative interventions are needed to curb this growing drug use and associated effects in Tanga and other settings with similar contexts., Competing Interests: All authors declare no competing interests., (Copyright: Harrieth Peter Ndumwa et al.)
- Published
- 2022
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9. Electrically controlled nicotine delivery through Carbon nanotube membranes via electrochemical oxidation and nanofluidically enhanced electroosmotic flow.
- Author
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Gulati GK and Hinds BJ
- Subjects
- Diffusion, Electroosmosis, Membranes, Artificial, Nicotine, Nanotubes, Carbon
- Abstract
A promising tool for nicotine addiction treatment is a programmable nicotine delivery device coupled to smart phone-assisted behavioral therapies. Key metrics for such a device are delivery of adjustable nicotine doses tailored to individual needs, compact size and power efficiency. Reported here is a detailed optimization of carbon nanotube (CNT) membrane fabrication based on electrochemical oxidation, to improve its electrically driven performance for nicotine fluxes and switching ON (-1.5 V)-OFF (0 V) flux ratio. ON- state nicotine flux of ~ 6 µmoles/cm
2 /h at -1.5 V applied bias was achieved allowing ~ 6-folds decrease in the size of device (4 cm2 ) to attain flux equivalent to high dose nicotine gum (1.1 µmoles/cm2 /h). Application of + 1.5 V bias in OFF state reduced diffusional background flux, giving an ON (-1.5 V)/OFF (+ 1.5 V) flux ratio of 68 that enabled device to deliver between the highest nicotine gum (1.1 µmoles/cm2 /h) and lowest nicotine patch (0.08 µmoles/cm2 /h) doses, as well as taper off nicotine doses for long term addiction treatment. The nicotine transport mechanism was studied as a function of pH and applied bias, using neutral tracer molecule, showing a mechanism of both electroosmosis and electrophoresis in the atomically smooth nanofluidic pores of CNTs. Optimal power consumption/flux efficiency of 111(µW/cm2 )/µmoles/cm2 /h was achieved allowing watch-battery lifetimes of 7-62 days for conventional treatment dosing regimens. Bluetooth-enabled, remotely controlled CNT membrane system has potential for treatments of nicotine, opioid and alcohol addictions that needs dose adjustment with precise temporal control., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)- Published
- 2021
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10. Depression, suicidality and associated risk factors among police officers in urban Tanzania: a cross-sectional study.
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Njiro BJ, Ndumwa HP, Msenga CJ, Kawala T, Matola E, Mhonda J, Corbin H, Ubuguyu O, and Likindikoki S
- Abstract
Background: The WHO has classified depression as a disease of public concern. Police officers are a particular subpopulation group that is at an increased risk for mental health problems. This study examined the prevalence of depression, suicidality and associated risk factors among police officers in urban Tanzania., Aims: The aim of this study was to examine the prevalence of depression, suicidality and associated risk factors among police officers in Tanzania., Methods: A cross-sectional study was conducted between April 2019 and October 2020 among 550 participants in Dar es Salaam recruited using a multistage cluster sampling technique. The Patient Health Questionnaire-9 was used to screen for depression and suicidality. The Interpersonal Support Evaluation List-12 tool was used to measure perceived social support. Descriptive statistics were summarised using frequencies and percentages. Bivariate and multivariate analyses were used to establish associations between predictors of interest, depression and suicidality., Results: There were 497 participants in the study. Of these, 76.6% (376 of 491) were men, and the median (IQR) age was 37.0 (17) years. Around 19.8% (96 of 486) of the police officers screened positive for depression and 15.4% (75 of 413) for suicidality. A significant proportion was either moderately (29 of 96, 30.2%) or severely depressed (8 of 75, 10.7 %). Of those who experienced suicidal thoughts, 10.7% (8 of 75) reported having daily suicidal thoughts. Perceiving low social support was associated with an increased risk of reporting depression (adjusted OR (aOR): 28.04, 95% CI: 8.42 to 93.37, p<0.001) and suicidality (aOR: 10.85, 95% CI: 3.56 to 33.08, p<0.001) as compared with those with high perceived social support., Conclusion: The magnitude of depression and suicidality among police officers in urban Tanzania is alarmingly high. The study findings indicate the need for routine screening for depression and suicidality among police officers and design appropriate mental health responsive services in this population., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2021
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11. Many Paths to the Same Goal: Balancing Exploration and Exploitation during Probabilistic Route Planning.
- Author
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Jackson BJ, Fatima GL, Oh S, and Gire DH
- Subjects
- Animals, Bayes Theorem, Rats, Reward, Cognition, Memory
- Abstract
During self-guided behaviors, animals identify constraints of the problems they face and adaptively employ appropriate strategies (Marsh, 2002). In the case of foraging, animals must balance sensory-guided exploration of an environment with memory-guided exploitation of known resource locations. Here, we show that animals adaptively shift cognitive resources between sensory and memory systems during foraging to optimize route planning under uncertainty. We demonstrate this using a new, laboratory-based discovery method to define the strategies used to solve a difficult route optimization scenario, the probabilistic "traveling salesman" problem (Raman and Gill, 2017; Fuentes et al., 2018; Mukherjee et al., 2019). Using this system, we precisely manipulated the strength of prior information as well as the complexity of the problem. We find that rats are capable of efficiently solving this route-planning problem, even under conditions with unreliable prior information and a large space of possible solutions. Through analysis of animals' trajectories, we show that they shift the balance between exploiting known locations and searching for new locations of rewards based on the predictability of reward locations. When compared with a Bayesian search, we found that animal performance is consistent with an approach that adaptively allocates cognitive resources between sensory processing and memory, enhancing sensory acuity and reducing memory load under conditions in which prior information is unreliable. Our findings establish new approaches to understand neural substrates of natural behavior as well as the rational development of biologically inspired approaches for complex real-world optimization., (Copyright © 2020 Jackson et al.)
- Published
- 2020
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12. Readiness of school teachers to accept notifications about causes and preventive measures on food poisoning.
- Author
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Marzo RR, Bhattacharya S, Niranjan V, Shagaran K, Mohd Idris MAB, Clement BJ, Raman V, and Sinappanrajah SAA
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Introduction: In this era of globalization, urbanization, and rapidly expanding unhygienic food corners across the globe, the incidence of food poisoning is very common nowadays., Aim: The aim of our study was to investigate the perceptions and readiness of schoolteachers to accept notifications on food poisoning as a part of education to the students., Methodology: A descriptive cross-sectional study was carried out with the help of a validated questionnaire for data collection. Our research involved schoolteachers from both primary and secondary schools in Muar. The questionnaire was pretested among the eligible trainee teachers and yielded an internal consistency reliability coefficient (c = Cronbach's alpha) of 0.082. This study was conducted from October 29, 2017, to December 14, 2018, in Muar. Our sample size was 259. Ethical consent was obtained from the Institution Ethical Committee., Results: A total of 259 schoolteachers from both primary and secondary schools in Muar were included in this study. In our study, 81.1% of the teachers responded that they can easily educate their students about food poisoning. Most of them (93.1%) were ready to receive notifications on food poisoning in any mode, and about 72% of the teachers preferred WhatsApp as their mode of receiving notification. The least (1.2%) preferred mode of notification was LINE (a social app). Teachers' willingness to disseminate the information regarding food poisoning was also higher (98.5%)., Conclusions: We concluded that majority of the schoolteachers had a good perception and were ready to receive the notifications on food poisoning through WhatsApp as a part of education to the students., Competing Interests: There are no conflicts of interest., (Copyright: © 2020 Journal of Education and Health Promotion.)
- Published
- 2020
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13. Proposed Treatment Approach for Type II Sockets: Report of Two Cases.
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Jackson BJ
- Subjects
- Tooth Extraction, Tooth Socket
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- 2019
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14. A preclinical evaluation of a programmable CNT membrane device for transdermal nicotine delivery in hairless Guinea pigs.
- Author
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Gulati GK, Berger LR, and Hinds BJ
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- Administration, Cutaneous, Animals, Cotinine blood, Guinea Pigs, Membranes, Artificial, Microdialysis, Nicotine pharmacokinetics, Nanotubes, Carbon, Nicotine administration & dosage
- Abstract
Nicotine replacement therapy in the form of transdermal nicotine patches and nicotine gums combined with behavioral counseling still has a low smoking cessation rate of 25%. A promising approach to smoking cessation is to remotely program variable transdermal nicotine delivery rates, with inputs from counselor and patient through a smartphone counseling application. A switchable carbon nanotube (CNT) membrane device has been developed for transdermal nicotine delivery that can be programmed to deliver variable doses matching those of nicotine patches (7, 14 and 21 mg/24 h) and nicotine gums (2 mg /4 mg). The performance of switchable devices was evaluated in vitro on flow-cell geometry and in vivo on the skin of hairless guinea pig (HGP). In vitro, CNT membrane devices successfully switched between therapeutically useful nicotine fluxes of 1.3-1.8 μmoles/cm
2 /h (ON, -1.5 V) and 0.17-0.23 μmoles/cm2 /h (OFF, 0 V), corresponded to the higher doses of gum and nicotine patch fluxes. In vivo, a microdialysis membrane probe was implanted in skin of HGP to directly detect nicotine fluxes through the skin barriers into dialysate with high temporal resolution. The CNT membrane device on HGP skin resulted in an ON/OFF nicotine flux ratio 6.4 ± 2.5 as detected in microdialysis membrane probe in skin. Compared to commercial nicotine patches, the device in ON state was approximately 2-2.4 times the commercial nicotine patch dose as measured by dialysate nicotine fluxes. These results enable smartphone-controlled, battery operated transdermal delivery devices that can be coupled to remote counseling apps for personalized smoking cessation therapy., (Copyright © 2018. Published by Elsevier B.V.)- Published
- 2019
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15. Treatment of early-stage laryngeal cancer: A comparison of treatment options.
- Author
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Baird BJ, Sung CK, Beadle BM, and Divi V
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- Clinical Trials as Topic, Disease-Free Survival, Epiglottis pathology, Epiglottis radiation effects, Epiglottis surgery, Glottis pathology, Glottis radiation effects, Glottis surgery, Humans, Laryngeal Neoplasms mortality, Laryngeal Neoplasms pathology, Laryngectomy adverse effects, Neck Dissection adverse effects, Neoplasm Staging, Organ Sparing Treatments adverse effects, Radiotherapy, Adjuvant adverse effects, Radiotherapy, Adjuvant methods, Squamous Cell Carcinoma of Head and Neck mortality, Squamous Cell Carcinoma of Head and Neck pathology, Laryngeal Neoplasms therapy, Laryngectomy methods, Neck Dissection methods, Organ Sparing Treatments methods, Squamous Cell Carcinoma of Head and Neck therapy
- Abstract
Over the course of the last several decades, the treatment options for early laryngeal cancers (T1 and T2) have evolved; however, simultaneously the mortality rate has increased. As larynx preservation approaches have become the standard of care, the selection of the proper treatment modality has become paramount. Radiation therapy or transoral laser microsurgery are the most common options for treatment of these early lesions. Oncologic and functional outcomes are considered equivalent between the two modalities for early glottic cancers; however, no direct comparisons exist for robust analysis. In terms of larynx preservation, there also is not compelling data favoring one treatment option or another. For early stage lesions, the goal for any larynx-sparing technique, either radiation or surgery, should be the intent to cure with single modality treatment and minimal short- and long-term toxicity. This article is designed to create a frame of reference for managing early stage disease with respect to lesions of the glottis and supraglottis while weighing treatment implications from an oncologic, functional, and cost perspective., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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16. Cobalt-Catalyzed and Lewis Acid-Assisted Nitrile Hydrogenation to Primary Amines: A Combined Effort.
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Tokmic K, Jackson BJ, Salazar A, Woods TJ, and Fout AR
- Abstract
The selective hydrogenation of nitriles to primary amines using a bench-stable cobalt precatalyst under 4 atm of H
2 is reported herein. The catalyst precursor was reduced in situ using NaHBEt3 , and the resulting Lewis acid formed, BEt3 , was found to be integral to the observed catalysis. Mechanistic insights gleaned from para-hydrogen induced polarization (PHIP) transfer NMR studies revealed that the pairwise hydrogenation of nitriles proceeded through a Co(I/III) redox process.- Published
- 2017
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17. The influence of lead content in drinking water, household dust, soil, and paint on blood lead levels of children in Flin Flon, Manitoba and Creighton, Saskatchewan.
- Author
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Safruk AM, McGregor E, Whitfield Aslund ML, Cheung PH, Pinsent C, Jackson BJ, Hair AT, Lee M, and Sigal EA
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- Child, Child, Preschool, Female, Humans, Infant, Male, Manitoba, Saskatchewan, Drinking Water chemistry, Dust, Environmental Exposure, Lead blood, Paint, Soil chemistry
- Abstract
Lead exposure continues to be an important health issue despite the general removal of lead sources in commercial and industrial applications. Low levels of lead exposure have been found to produce adverse neurodevelopmental effects in children with no evidence that a threshold exists for this critical endpoint. Blood lead levels (BLLs) were measured in children (n=118) under the age of 7years in the northern Canadian smelter community of Flin Flon, Manitoba and Creighton, Saskatchewan. An environmental sampling component was included to examine the relationship between lead content in outdoor soil, household dust, tap water, and paint within a given household and the corresponding BLLs in participating children. The geometric mean (GM) BLL for study participants was 1.41μg/dL. Blood lead levels varied slightly by age category with the lowest levels found among the children under age 2 (GM=1.11μg/dL) and the highest levels found among children between 2 and 3years of age (GM=1.98μg/dL). Results from the multivariate modeling indicated that BLLs had a significant positive association with the age of housing (p<0.05), with children living in households constructed prior to 1945 being more likely to have higher levels (p=0.034). Outdoor soil (GM=74.7μg/g), household dust from kitchen floors (GM=1.34μg/ft
2 ), and maximum household lead paint were found to be significantly correlated (p<0.05) to BLLs. Although a statistically significant association between concentrations of lead in these household media and the corresponding BLLs exists, the variability in BLLs was poorly explained by these factors alone (r2 =0.07, 0.12 and 0.06 for soil, household dust, and paint, respectively). Lead concentrations in flushed (GM=0.89μg/L) and stagnant (GM=2.07μg/L and 1.18μg/L) tap water samples were not significantly correlated (p>0.05) to BLLs., (Copyright © 2017 Elsevier B.V. All rights reserved.)- Published
- 2017
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18. Small-Diameter Implants: A 7-Year Retrospective Study.
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Jackson BJ
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- Dental Implantation, Endosseous, Dental Prosthesis Design, Dental Restoration Failure, Follow-Up Studies, Humans, Retrospective Studies, Treatment Outcome, Alveolar Bone Loss, Dental Implants, Dental Prosthesis, Implant-Supported
- Abstract
Oral implantology has become a major discipline within the field of dentistry. Small or mini dental implants have demonstrated success in the retention of removable and fixed prostheses. Small-diameter implants (SDI) and mini-diameter implants (MDI) describe a group of implants that demonstrate a diameter less than 3 mm. This retrospective study reports on 335 SDI placed during a 7-year period. All implants were placed in healed sites (>6 months) and loaded immediately or after waiting 3 months. A total of 321 implants were restored and functional within the study's time interval. A total of 14 implants failed, resulting in a 96.1% implant success rate. Treatment plan considerations should include prosthetic design, specific arch, and immediate load. Overall, SDI can be utilized as an alternative implant treatment option for patients with atrophic bone, compromised medical histories and financial constraints.
- Published
- 2017
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19. Programmable carbon nanotube membrane-based transdermal nicotine delivery with microdialysis validation assay.
- Author
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Gulati GK, Chen T, and Hinds BJ
- Subjects
- Administration, Cutaneous, Animals, Nicotine therapeutic use, Skin, Swine, Tobacco Use Cessation Devices, Drug Delivery Systems, Microdialysis, Nanotubes, Carbon chemistry, Nicotine administration & dosage
- Abstract
To evaluate the performance of switchable carbon nanotubes (CNT) membrane devices for transdermal nicotine delivery, we have developed an in-vitro microdialysis method that allow us to detect variable transdermal fluxes of nicotine through CNT devices and can be applied directly to in-vivo studies. Microdialysis membranes were placed beneath the porcine skin and its nicotine levels increased 6-8 times when the CNT membrane on skin was turned from OFF to ON state by application of bias. Fluxes in the ON state were approximately 3 times that of commercial nicotine patches and switching times were less than two hours, thus suggesting the improved therapeutic potential of our device. Blue tooth enabled CNT devices that can be programmed by smartphone and coupled with remote counseling application for enhanced smoking cessation treatments., (Copyright © 2016. Published by Elsevier Inc.)
- Published
- 2017
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20. Small-Diameter Implant Treatment Plan Revision: Management of Complications.
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Jackson BJ
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- Humans, Postoperative Complications, Dental Implants, Reoperation
- Published
- 2016
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21. Detection and confirmation of serum lipid biomarkers for preeclampsia using direct infusion mass spectrometry.
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Anand S, Young S, Esplin MS, Peaden B, Tolley HD, Porter TF, Varner MW, D'Alton ME, Jackson BJ, and Graves SW
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- Adult, Biomarkers blood, Female, Humans, Pregnancy, Reproducibility of Results, Blood Chemical Analysis methods, Lipids blood, Mass Spectrometry methods, Pre-Eclampsia blood
- Abstract
Despite substantial research, the early diagnosis of preeclampsia remains elusive. Lipids are now recognized to be involved in regulation and pathophysiology of some disease. Shotgun lipidomic studies were undertaken to determine whether serum lipid biomarkers exist that predict preeclampsia later in the same in pregnancy. A discovery study was performed using sera collected at 12-14 weeks pregnancy from 27 controls with uncomplicated pregnancies and 29 cases that later developed preeclampsia. Lipids were extracted and analyzed by direct infusion into a TOF mass spectrometer. MS signals, demonstrating apparent differences were selected, their abundances determined, and statistical differences tested. Statistically significant lipid markers were reevaluated in a second confirmatory study having 43 controls and 37 preeclampsia cases. Multi-marker combinations were developed using those lipid biomarkers confirmed in the second study. The initial study detected 45 potential preeclampsia markers. Of these, 23 markers continued to be statistically significant in the second confirmatory set. Most of these markers, representing several lipid classes, were chemically characterized, typically providing lipid class and potential molecular components using MS(2) Several multi-marker panels with areas under the curve >0.85 and high predictive values were developed. Developed panels of serum lipidomic biomarkers appear to be able to identify most women at risk for preeclampsia in a given pregnancy at 12-14 weeks gestation., (Copyright © 2016 by the American Society for Biochemistry and Molecular Biology, Inc.)
- Published
- 2016
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22. The bioaccessibility of soil-based mercury as determined by physiological based extraction tests and human biomonitoring in children.
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Safruk AM, Berger RG, Jackson BJ, Pinsent C, Hair AT, and Sigal EA
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- Canada, Child, Environmental Exposure statistics & numerical data, Environmental Pollution statistics & numerical data, Humans, Mercury metabolism, Risk Assessment, Soil, Soil Pollutants metabolism, Environmental Exposure analysis, Mercury analysis, Soil Pollutants analysis
- Abstract
Environmental contaminants associated with soil particles are generally less bioavailable than contaminants associated with other exposure media where chemicals are often found in more soluble forms. In vitro methods, such as Physiological Based Extraction Tests (PBET), can provide estimates of bioaccessibility for soil-based contaminants. The results of these tests can be used to predict exposure to contaminants from soil ingestion pathways within human health risk assessment (HHRA). In the current investigation, an HHRA was conducted to examine the risks associated with elevated concentrations of mercury in soils in the northern Canadian smelter community of Flin Flon, Manitoba. A PBET was completed for residential soils and indicated mean bioaccessibilities of 1.2% and 3.0% for total mercury using gastric phase and gastric+intestinal phase methodologies, respectively. However, as many regulators only allow for the consideration of in vitro results for lead and arsenic in the HHRA process, in vitro bioaccessibility results for mercury were not utilized in the current HHRA. Based on the need to assume 100% bioaccessibility for inorganic mercury in soil, results from the HHRA indicated the need for further assessment of exposure and risk. A biomonitoring study was undertaken for children between 2 and 15 years of age in the community to examine urinary inorganic mercury concentrations. Overall, 375 children provided valid urine samples for analysis. Approximately 50% of urine samples had concentrations of urinary inorganic mercury below the limit of detection (0.1 μg/L), with an average creatinine adjusted concentration of 0.11 μg/g. Despite high variability in mercury soil concentrations within sub-communities, soil concentrations did not appear to influence urinary mercury concentrations. The results of the current investigation indicate that mercury bioaccessibility in residential soils in the Flin Flon area was likely limited and that HHRA estimates would have been better approximated through inclusion of the in vitro study results., (Copyright © 2015. Published by Elsevier B.V.)
- Published
- 2015
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23. Pre-pregnancy high-risk factors at first antenatal visit: how predictive are these of pregnancy outcomes?
- Author
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Tandu-Umba B, Mbangama MA, Kamongola KM, Kamgang Tchawou AG, Kivuidi MP, Kasonga Munene S, Kambashi Meke I, Kapuku Kabasele O, Kondoli BJ, Kikuni KR, and Kasikila Kuzungu S
- Abstract
Objective: To determine relationships between pre-pregnancy risk factors at first antenatal visit booking and pregnancy outcomes., Study Design: This was a multicenter, cross-sectional study involving women admitted for singleton delivery from July 1 until October 31 (3 months), 2013, at nine major maternity clinics in Kinshasa, Democratic Republic of Congo. All women were checked for hereditary, community, and personal medical/surgical risk situations and mother/infant problems in previous pregnancies. Maternal and perinatal complications related to current/just-terminated pregnancy were analyzed according to pre-pregnancy risk factors in order to establish their prediction concerning maternal and perinatal complications related to current/just-terminated pregnancy (odds ratios). Results are given with 95% confidence intervals, and P<0.05 was considered significant., Results: The study sample comprised 2,086 women. Primiparity (36.5%), single relationship status (26.4%), and maternal age ≥35 years (18.3%) were the most important non-pathologic risk factors, while arterial hypertension in family (34.3%), previous miscarriage (33.2%), overweight/obesity (21.9%), diabetes in family (21.1%), previous cesarean section (15.7%), previous postpartum hemorrhage (13.1%), low birth weight (10%), previous macrosomia (10%), and previous premature rupture of membranes (6.2%) predominated among pathologic risk factors. Major adverse outcomes recurred in some women, with recurrence rates of 21/37 (57%), 111/208 (53%), 74/208 (36%), 191/598 (32%), 132/466 (28%), 24/130 (18%), and 4/65 (6%) for prematurity, low birth weight, macrosomia, preeclampsia/eclampsia, cesarean section, premature rupture of membranes, and stillbirth, respectively. Outcomes that were significantly influenced by non-pathologic risk factors were also significantly influenced by pathologic risk factors., Conclusion: Pregnancy adverse outcomes are strongly influenced by either non-pathologic or pathologic pre-pregnancy risk factors at first antenatal visit booking. The recurrence potential of complications is one reason to establish the predictability and preventability of morbidity such that the most appropriate referrals and best options throughout the pregnancy can be determined.
- Published
- 2014
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24. Fixed partial denture treatment with mini dental implants.
- Author
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Jackson BJ
- Subjects
- Aged, 80 and over, Denture Design, Follow-Up Studies, Humans, Jaw, Edentulous, Partially rehabilitation, Jaw, Edentulous, Partially surgery, Male, Mandible surgery, Miniaturization, Patient Care Planning, Dental Implants, Dental Prosthesis, Implant-Supported, Denture, Partial, Fixed
- Published
- 2014
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25. The relationship between sleep and drug use characteristics in participants with cocaine or methamphetamine use disorders.
- Author
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Mahoney JJ 3rd, De La Garza R 2nd, Jackson BJ, Verrico CD, Ho A, Iqbal T, and Newton TF
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- Adult, Amphetamine-Related Disorders complications, Cocaine-Related Disorders complications, Female, Humans, Male, Middle Aged, Self Report, Sleep Wake Disorders complications, Surveys and Questionnaires, Amphetamine-Related Disorders psychology, Cocaine-Related Disorders psychology, Drug Users psychology, Sleep, Sleep Wake Disorders psychology
- Abstract
The goal of this project was to evaluate the relationship between self-reported sleep habits, daytime sleepiness, and drug use variables in individuals with cocaine and methamphetamine (METH) use disorders. Participants with a cocaine or meth use disorder completed questionnaires, including the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), and a demographic/drug use form. Participants with a cocaine (N=51) or meth use disorder (N=85) were separated into those with either high or low sleep deficits. In participants with a cocaine use disorder, ANOVA revealed significantly higher ESS scores among those defined as "poor sleepers" (with a PSQI score >5) when compared to those defined as "good sleepers" (with a PSQI score ≤5). In addition, poor sleepers reported using cocaine for more days out of the past 30 when compared to good sleepers. Interestingly, good sleepers reported using more grams of cocaine/day compared to poor sleepers. In participants with a METH use disorder, ANOVA revealed significantly higher ESS scores among poor sleepers when compared to good sleepers. Finally, individuals with a METH use disorder that endorsed elevated daytime sleepiness also had significantly higher PSQI scores when compared to those with normal daytime sleepiness. The results indicate that drug use variables, such as recent and daily use, may affect sleep quality and daytime sleepiness in individuals with stimulant use disorders; however, further investigations (i.e. in cocaine and METH users that do not meet criteria for a cocaine or METH use disorder) must be conducted in order to provide more conclusive evidence of the impact these usage variables may have on these sleep characteristics., (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
26. Small-diameter implants: a treatment consideration for the maxillary edentulous patient.
- Author
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Jackson BJ
- Subjects
- Aged, Alveolar Ridge Augmentation methods, Bone Substitutes therapeutic use, Dental Implantation, Endosseous methods, Denture Design, Denture Retention, Denture, Complete, Upper, Denture, Overlay, Humans, Jaw, Edentulous rehabilitation, Male, Osseointegration physiology, Patient Care Planning, Tooth Socket surgery, Dental Implants, Dental Prosthesis Design, Dental Prosthesis, Implant-Supported, Jaw, Edentulous surgery, Maxilla surgery
- Published
- 2013
27. Treatment of congenitally missing maxillary lateral incisors: an interdisciplinary approach.
- Author
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Jackson BJ and Slavin MR
- Subjects
- Adult, Bone Substitutes therapeutic use, Cementation methods, Crowns, Cuspid surgery, Dental Implantation, Endosseous methods, Dental Implants, Single-Tooth, Dental Materials chemistry, Dental Prosthesis Design, Humans, Male, Maxilla, Osseointegration physiology, Patient Care Planning, Tooth Movement Techniques methods, Tooth Socket surgery, Tooth, Deciduous surgery, Zinc Phosphate Cement chemistry, Zirconium chemistry, Anodontia rehabilitation, Incisor abnormalities, Patient Care Team
- Abstract
Dentists have several treatment options when restoring patients with congenitally missing maxillary lateral incisors. Endosseous implant therapy combined with orthodontics can achieve predictable outcomes while meeting patient expectations. This case report exhibits an interdisciplinary approach involving orthodontics, implant surgery, and prosthodontics to resolve this common dental concern.
- Published
- 2013
- Full Text
- View/download PDF
28. Sacral nerve stimulation for neuromodulation of the lower urinary tract.
- Author
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Hubsher CP, Jansen R, Riggs DR, Jackson BJ, and Zaslau S
- Subjects
- Humans, Patient Selection, Urethra innervation, Urinary Bladder innervation, Electric Stimulation Therapy methods, Lumbosacral Plexus, Urination Disorders therapy
- Abstract
Sacral neuromodulation (SNM) has become a standard treatment option for patients suffering from urinary urge incontinence, urgency-frequency, and/or nonobstructive urinary retention refractory to conservative and pharmacologic treatment. Since its initial development, the manufacturer of InterStim therapy (Medtronic, Inc., Minneapolis, MN, USA), has introduced technical modifications, while surgeons and researchers have adapted and published various innovations and alterations of the implantation technique. In this article, we feature our SNM technique including patient selection, comprehensive dialogue/evaluation, procedure details, and appropriate follow up. Although there is often great variability in patients with lower urinary tract dysfunction, we maintain that great success can be achieved with a systematic and methodical approach to SNM.
- Published
- 2012
29. Acute modafinil exposure reduces daytime sleepiness in abstinent methamphetamine-dependent volunteers.
- Author
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Mahoney JJ, Jackson BJ, Kalechstein AD, De La Garza R 2nd, Chang LC, and Newton TF
- Subjects
- Adult, Amphetamine-Related Disorders complications, Cognition drug effects, Demography, Diagnostic and Statistical Manual of Mental Disorders, Double-Blind Method, Female, Humans, Male, Modafinil, Neuropsychological Tests, Polysomnography, Psychiatric Status Rating Scales, Sleep drug effects, Substance Withdrawal Syndrome psychology, Treatment Outcome, Amphetamine-Related Disorders psychology, Benzhydryl Compounds therapeutic use, Central Nervous System Stimulants therapeutic use, Methamphetamine, Sleep Wake Disorders drug therapy, Sleep Wake Disorders etiology
- Abstract
The purpose of this study was to evaluate the effects of acute, oral modafinil (200 mg) exposure on daytime sleepiness in methamphetamine (Meth)-dependent individuals. Eighteen Meth-dependent subjects were enrolled in a 7-d inpatient study and were administered placebo or modafinil on day 6 and the counter-condition on day 7 (randomized) of the protocol. Subjects completed several subjective daily assessments (such as the Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index, Beck Depression Inventory and visual analogue scale) throughout the protocol as well as objective assessments on days 5-7, when the Multiple Sleep Latency Test was performed. The results of the current study suggest that short-term abstinence from Meth is associated with increased daytime sleepiness and that a single dose of 200 mg modafinil reduces daytime somnolence in this population. In addition, a positive correlation was found between subjective reporting of the likelihood of taking a nap and craving and desire for Meth, as well as the likelihood of using Meth and whether Meth would make the participant feel better. The results of this study should be considered when investigating candidate medications for Meth-dependence, especially in those individuals who attribute their Meth use to overcoming deficits resulting from sleep abnormalities.
- Published
- 2012
- Full Text
- View/download PDF
30. Possible prevention and treatment of prostate cancer by exercise.
- Author
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Zaslau S, Jansen R, Riggs DR, Jackson BJ, and Bryner RW
- Subjects
- Androgen Antagonists adverse effects, Humans, Male, Radiotherapy adverse effects, Exercise, Prostatic Neoplasms prevention & control, Prostatic Neoplasms therapy
- Abstract
Exercise and physical activity have been linked to the prevention of certain types of cancer such as colon and breast. As prostate cancer is the most common malignancy diagnosed in the male population, there is obvious interest in determining a possible effect of exercise on disease prevention and improvement of disease-related outcomes. Thus far, data has been conflicting and there has been no clear determination of prostate cancer prevention through exercise. However, as prostate cancer treatment carries many side effects which may be bothersome and health-threatening, researchers have examined the effects of exercise training on reducing treatment-related complications and improving outcomes and quality of life (QOL). In this review, we discuss the impact of exercise on reducing side effects of prostate cancer treatment and improving cancer-specific and overall survival outcomes, as well as improving QOL in prostate cancer patients.
- Published
- 2012
31. Long-term neurodevelopmental outcomes in children born with gastroschisis: the tiebreaker.
- Author
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Gorra AS, Needelman H, Azarow KS, Roberts HJ, Jackson BJ, and Cusick RA
- Subjects
- Case-Control Studies, Cohort Studies, Female, Gastroschisis surgery, Humans, Infant, Male, Retrospective Studies, Time Factors, Developmental Disabilities etiology, Gastroschisis complications, Nervous System Diseases etiology
- Abstract
Purpose: We evaluated 2-year neurodevelopmental outcomes in children with gastroschisis., Methods: We reviewed the records of children with gastroschisis treated between August 2001 and July 2008. Children discharged from the neonatal intensive care unit were referred to the state-sponsored Developmental Tracking Infant Progress Statewide (TIPS) program. We reviewed TIPS assessments performed before age 2 years. School districts evaluated children referred by TIPS and determined their eligibility for early intervention services. Poor outcomes were defined as scores of "failure" or "moderate/high risk" on the screening assessment or enrollment in early intervention services by 2 years. Children with gastroschisis were compared with case-matched nonsurgical, nonsyndromic children of similar gestational age and birth weight., Results: One hundred five children were born with gastroschisis, and 46 were followed up with TIPS. There was no statistically significant difference in performance on screening assessments or in the rate of enrollment in early intervention services between the gastroschisis children and controls., Conclusions: Children born with gastroschisis have similar 2-year neurodevelopmental outcomes as nonsurgical, nonsyndromic neonatal intensive care unit children of similar gestational age and birth weight. Both groups of children have a higher rate of enrollment in early intervention than their healthy peers. These data suggest that neurodevelopmental outcomes in gastroschisis children are delayed secondary to prematurity rather than the presence of the surgical disease., (Copyright © 2012 Elsevier Inc. All rights reserved.)
- Published
- 2012
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32. Acute, low-dose methamphetamine administration improves attention/information processing speed and working memory in methamphetamine-dependent individuals displaying poorer cognitive performance at baseline.
- Author
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Mahoney JJ 3rd, Jackson BJ, Kalechstein AD, De La Garza R 2nd, and Newton TF
- Subjects
- Adult, Attention drug effects, Cognition drug effects, Female, Humans, Injections, Intraventricular, Learning drug effects, Male, Memory drug effects, Memory, Short-Term drug effects, Neuropsychological Tests, Reaction Time drug effects, Time Factors, Verbal Learning drug effects, Young Adult, Amphetamine-Related Disorders drug therapy, Amphetamine-Related Disorders psychology, Central Nervous System Stimulants administration & dosage, Cognition Disorders drug therapy, Methamphetamine administration & dosage
- Abstract
Abstinent methamphetamine (Meth) dependent individuals demonstrate poorer performance on tests sensitive to attention/information processing speed, learning and memory, and working memory when compared to non-Meth dependent individuals. The poorer performance on these tests may contribute to the morbidity associated with Meth-dependence. In light of this, we sought to determine the effects of acute, low-dose Meth administration on attention, working memory, and verbal learning and memory in 19 non-treatment seeking, Meth-dependent individuals. Participants were predominantly male (89%), Caucasian (63%), and cigarette smokers (63%). Following a four day, drug-free washout period, participants were given a single-blind intravenous infusion of saline, followed the next day by 30 mg of Meth. A battery of neurocognitive tasks was administered before and after each infusion, and performance on measures of accuracy and reaction time were compared between conditions. While acute Meth exposure did not affect test performance for the entire sample, participants who demonstrated relatively poor performance on these tests at baseline, identified using a median split on each test, showed significant improvement on measures of attention/information processing speed and working memory when administered Meth. Improved performance was seen on the following measures of working memory: choice reaction time task (p≤0.04), a 1-back task (p≤0.01), and a 2-back task (p≤0.04). In addition, those participants demonstrating high neurocognitive performance at baseline experienced similar or decreased performance following Meth exposure. These findings suggest that acute administration of Meth may temporarily improve Meth-associated neurocognitive performance in those individuals experiencing lower cognitive performance at baseline. As a result, stimulants may serve as a successful treatment for improving cognitive functioning in those Meth-dependent individuals experiencing neurocognitive impairment., (Copyright © 2010 Elsevier B.V. All rights reserved.)
- Published
- 2011
- Full Text
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33. Small diameter implants: specific indications and considerations for the posterior mandible: a case report.
- Author
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Jackson BJ
- Subjects
- Dental Restoration, Permanent methods, Female, Humans, Jaw, Edentulous, Partially surgery, Male, Mandible surgery, Middle Aged, Molar, Treatment Outcome, Dental Implantation, Endosseous methods, Dental Implants, Single-Tooth, Dental Prosthesis Design, Dental Restoration, Permanent instrumentation, Jaw, Edentulous, Partially rehabilitation
- Abstract
The field of implant dentistry continues to grow globally as clinicians embrace the evolution of various endosseous implant technologies and the array of enhanced surgical and prosthetic products. The utilization of small diameter implants in limited osseous regions increases patients' ability to choose implants as a viable restorative option. Although small diameter implants have been indicated in the incisor region for the maxilla and mandible primarily, their usage should be considered in select posterior regions. These 2 case reports demonstrate the incorporation of small diameter implants to replace missing mandibular posterior teeth.
- Published
- 2011
- Full Text
- View/download PDF
34. Screening phosphatidylcholine biomarkers in mouse liver extracts from a hypercholesterolemia study using ESI-MS and chemometrics.
- Author
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Yang L, Bennett R, Strum J, Ellsworth BB, Hamilton D, Tomlinson M, Wolf RW, Housley M, Roberts BA, Welsh J, Jackson BJ, Wood SG, Banka CL, Thulin CD, and Linford MR
- Subjects
- Animals, Cluster Analysis, Mice, Mice, Inbred C57BL, Receptors, LDL deficiency, Reproducibility of Results, Sensitivity and Specificity, Biomarkers analysis, Computational Biology, Hypercholesterolemia blood, Liver chemistry, Phosphatidylcholines analysis, Spectrometry, Mass, Electrospray Ionization
- Abstract
When fed a high-fat, high-cholesterol diet (HFD), homozygous LDL receptor knockout mice exhibit extremely high levels of plasma cholesterol that are expected to influence liver metabolism. One step in the investigation of potential hepatic alterations was the analysis of organic extracts of livers from these and control mice by electrospray mass spectrometry (ESI-MS). Chemometrics (bioinformatics) analysis shows that the sample spectra cluster into two groups: one from mice with plasma cholesterol levels in excess of 900 mg dL(-1) and one from animals with cholesterol levels of 60-250 mg dL(-1). The loadings plot of the first PC in the principal-components analysis (PCA) reveals the chemical basis for clustering, i.e., biomarkers present at different concentrations in the different groups. The exact masses of the key peaks in this loadings plot indicate these species are phosphatidylcholines (PtdChos). This assignment is confirmed by tandem MS. Partial least-squares (PLS) with variable selection shows that the spectra are well correlated with plasma total cholesterol, HDL cholesterol, and triglyceride (TG) levels.
- Published
- 2009
- Full Text
- View/download PDF
35. Sexual dysfunction in patients with painful bladder syndrome is age related and progressive.
- Author
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Zaslau S, Riggs DR, Perlmutter AE, Jackson BJ, Osborne J, and Kandzari SJ
- Subjects
- Adult, Age Factors, Cystitis, Interstitial physiopathology, Disease Progression, Female, Follow-Up Studies, Humans, Incidence, Middle Aged, Quality of Life, Risk Factors, Severity of Illness Index, Sexual Dysfunction, Physiological etiology, Sexual Dysfunction, Physiological physiopathology, Surveys and Questionnaires, Cystitis, Interstitial complications, Sexual Dysfunction, Physiological epidemiology, Sexuality physiology
- Abstract
Introduction/objective: The degree of sexual dysfunction in patients with painful bladder syndrome (PBS) across their lifespan has not been previously documented., Material and Methods: The Female Sexual Function Index (FSFI) is a research tool to measure the degree of clinical female sexual dysfunction (FSD). This 19-item questionnaire evaluates FSD in six domains: desire, arousal, lubrication, orgasm, satisfaction, and pain. This study used the FSFI with the additional variables of age, geographical location, and current medications. The participants were not blinded to the fact that this study was examining the link between PBS and FSD. Each question in the survey was targeted to a specific variable of FSD and the answers were rated on a Lickert scale., Results: When compared with controls, PBS patients self-report significant sexual dysfunction in all domains evaluated by the FSFI (p < 0.001). Age-specific results were observed in regards to the domains of arousal, lubrication, and pain (p < 0.01)., Conclusions: PBS patients report significant FSD in all domains when compared to controls (p < 0.001). Significant differences in the domains of arousal, lubrication, and pain exist between respondents < 30 years old and in those > 50 years of age. The extent of sexual dysfunction is worse in the areas of pain in each age group evaluated. Pain is the most significant finding in patients with FSD and PBS.
- Published
- 2008
36. Corn-derived carbohydrate inositol hexaphosphate inhibits Barrett's adenocarcinoma growth by pro-apoptotic mechanisms.
- Author
-
McFadden DW, Riggs DR, Jackson BJ, and Cunningham C
- Subjects
- Apoptosis, Carbohydrates pharmacology, Cell Line, Tumor, Humans, Male, Zea mays, Adenocarcinoma pathology, Antineoplastic Agents pharmacology, Barrett Esophagus pathology, Cell Proliferation drug effects, Esophageal Neoplasms pathology, Phytic Acid pharmacology
- Abstract
Inositol hexaphosphate (IP6) is a naturally occurring polyphosphorylated carbohydrate that is found in food sources high in fiber content. IP6 has been reported to have significant inhibitory effects against a variety of primary tumors. We hypothesized that IP6 would inhibit the cell growth rate of Barrett's adenocarcinoma in vitro. Two Barrett's-associated adenocarcinoma cell lines, SEG-1 and BIC-1, were treated with IP6 at 0.5, 1.0 and 5.0 mM concentrations. Cell viability was measured by MTT assay. Apoptosis and necrosis were evaluated by the Annexin V FITC assay. Reductions (P<0.001) in cellular proliferation were observed in both cell lines. IP6 decreased late apoptosis and necrosis in BIC cells, whereas in SEG-1 cells, early apoptosis, late apoptosis and necrosis were all increased by IP6. IP6 decreases cellular growth by pro-apoptotic mechanisms. Our findings suggest that IP6 has the potential to become an effective adjunct for Barrett's adenocarcinoma. Further studies are needed to evaluate safety and clinical utility of this agent in patients with Barrett's adenocarcinoma.
- Published
- 2008
37. Keyhole limpet hemocyanin: an effective adjunct against melanoma in vivo.
- Author
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Rizvi I, Riggs DR, Jackson BJ, and McFadden DW
- Subjects
- Animals, Cell Line, Tumor, Female, Interferon-alpha therapeutic use, Interleukin-2 therapeutic use, Mice, Xenograft Model Antitumor Assays, Adjuvants, Immunologic therapeutic use, Hemocyanins therapeutic use, Melanoma drug therapy, Skin Neoplasms drug therapy
- Abstract
Background: We have previously demonstrated the potent in vitro antiproliferative effects of keyhole limpet hemocyanin (KLH) against melanoma. Our prior studies directed us to hypothesize that KLH would be effective in vivo against melanoma, alone and in combination with conventional immunotherapy., Methods: Mice were inoculated with 2 x 10(7) HTB68 cells and randomized to 6 groups. Treatment groups consisted of control, KLH 200 microg, alpha interferon (AIFN) 1000 IU, interleukin-2 (IL-2) 5000 IU, KLH + AIFN, and KLH + IL-2., Results: KLH + IL-2 exhibited the greatest reduction in tumor volume (30%) as compared to control (P = .014), followed by KLH + AIFN (28%, P = .031). Singly treated animals had less tumor inhibition: IL-2 (30%, P = .022), KLH (18%, not significant), and AIFN (16%, not significant)., Conclusions: KLH augments the effects of AIFN, one of the standard immunotherapeutic agents against melanoma in vivo. Further in vivo and early clinical studies into the effects of KLH as both a single and combined agent are warranted.
- Published
- 2007
- Full Text
- View/download PDF
38. Dietary influence on pancreatic cancer growth by catechin and inositol hexaphosphate.
- Author
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McMillan B, Riggs DR, Jackson BJ, Cunningham C, and McFadden DW
- Subjects
- Apoptosis drug effects, Catechin therapeutic use, Cell Line, Tumor, Cell Survival drug effects, Drug Synergism, Humans, Necrosis, Pancreatic Neoplasms drug therapy, Pancreatic Neoplasms metabolism, Pancreatic Neoplasms prevention & control, Phytic Acid therapeutic use, Tetrazolium Salts metabolism, Thiazoles metabolism, Vascular Endothelial Growth Factor A metabolism, Catechin pharmacology, Cell Proliferation drug effects, Pancreatic Neoplasms pathology, Phytic Acid pharmacology
- Abstract
Introduction: Pancreatic cancer is an extremely virulent form of cancer with few effective treatments. Catechin and inositol hexaphosphate (IP6), two naturally occurring molecules found in green tea and high-fiber foods, respectively, are compounds that have been shown to demonstrate anti-proliferative effects when administered as single therapeutic agents against a number of cancers. We hypothesized that, alone and in combination, IP6 and catechin would be effective against pancreatic cancer., Materials and Methods: Pancreatic (PANC-1 and MIAPACA) cancer cell lines were cultured and treated with IP6 (0.8 mM/well), catechin (100 microM/well), and the combination of the two. Cell viability was measured by 3-(4,5-dimethylthiazol-2-y1)-2,5-diphenyltetrazolium bromide (MTT) at 24, 48, and 72 h. Vascular endothelial growth factor (VEGF) was measured in the cell supernatants by ELISA. Apoptosis was evaluated by Annexin V-fluorescein isothiocyanate (FITC)., Results: The combination of catechin and IP6 significantly inhibited proliferation in the PANC-1 cell line at 24, 48, and 72 h compared to single agents (P < 0.001). Growth of the MIAPACA cell line was inhibited (P < 0.01) by each agent alone, but additive inhibitory effects were not seen. An increase in early apoptosis was attributed to catechin therapy in both cell lines (P < 0.01). The combination of these agents also increased early apoptotic activity when compared to the control (P < 0.001). IP6 reduced VEGF in both cell lines (P < 0.01). In combination, catechin and IP6 amplified VEGF reduction compared to each agent in MIAPACA and control (P < 0.002)., Conclusions: These results, combined with the prevalence of these compounds in safe, naturally occurring foods, make catechin and IP6 attractive therapies for treatment, and possibly in preventative trials, of pancreatic cancer.
- Published
- 2007
- Full Text
- View/download PDF
39. Keyhole limpet hemocyanin potentiates standard immunotherapy for melanoma.
- Author
-
McFadden DW, Riggs DR, Jackson BJ, Ng A, and Cunningham C
- Subjects
- Adjuvants, Immunologic therapeutic use, Antineoplastic Agents therapeutic use, Apoptosis drug effects, Cell Line, Tumor, Cell Proliferation drug effects, Drug Synergism, Hemocyanins therapeutic use, Humans, Immunotherapy, Interferon-alpha therapeutic use, Interleukin-2 therapeutic use, Melanoma metabolism, Skin Neoplasms metabolism, Vascular Endothelial Growth Factor A biosynthesis, Adjuvants, Immunologic pharmacology, Cell Survival drug effects, Hemocyanins pharmacology, Melanoma drug therapy, Skin Neoplasms drug therapy
- Abstract
Introduction: Our hypothesis was that keyhole limpet hemocyanin (KLH) would augment the effects of standard immunotherapies for melanoma including interferon-alpha (AIFN) and interleukin (IL)-2., Methods: The HTB68 melanoma cell line was treated with KLH, AIFN, and IL-2 as single and combined agents. Cell viability, apoptotic activity, and vascular endothelial growth factor levels were all evaluated., Results: Cell growth was reduced with KLH (28%), AIFN (54%), and IL-2 (29%) (all P < .001). KLH and IL-2 combined exhibited a 47% inhibition of cell growth, whereas KLH and AIFN combined yielded a 67% reduction in cell growth (both P < .001). KLH and AIFN combined significantly increased both early (10%) and late (14%) apoptotic activity compared with controls (5% and 7%, P < .001)., Conclusions: The additive effects exhibited by the combination of KLH with AIFN or IL-2 are encouraging and support combination therapy as an effective treatment for this aggressive disease.
- Published
- 2007
- Full Text
- View/download PDF
40. Socket grafting: a predictable technique for site preservation.
- Author
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Jackson BJ and Morcos I
- Subjects
- Adolescent, Adult, Dental Caries surgery, Female, Humans, Male, Middle Aged, Bone Substitutes therapeutic use, Bone Transplantation methods, Dental Implantation, Endosseous methods, Tooth Fractures surgery, Tooth Root injuries, Tooth Socket surgery
- Abstract
The demand for dental implants continues to rise worldwide, requiring clinicians to consider the incorporation of bone preservation procedures into their dental practice. Socket grafting offers a predictable, simple way to conserve the buccolingual and mesiodistal dimensions of the future implant site. Careful bone management and the use of various bone-grafting materials must be part of the practice of every implantologist. In this case report, the authors present a fundamental technique for socket grafting and 3 cases of site preservation with subsequent implant placement and restoration. Emphasis is placed on the evidence-based rationale for this procedure, the clinical technique, and the various grafting materials that can be employed by the clinician.
- Published
- 2007
- Full Text
- View/download PDF
41. Peptide YY reverses TNF-alpha induced transcription factor binding of interferon regulatory factor-1 and p53 in pancreatic acinar cells.
- Author
-
Rizvi IA, Robinson K, McFadden DW, Riggs DR, Jackson BJ, and Vona-Davis L
- Subjects
- Acute Disease, Amylases metabolism, Animals, Cell Line, Interferon Regulatory Factor-1 genetics, Oligonucleotide Array Sequence Analysis, Pancreas, Exocrine cytology, Pancreas, Exocrine drug effects, Pancreatitis metabolism, Peptide YY pharmacology, Protein Binding drug effects, Rats, Transcription Factors genetics, Transcription Factors metabolism, Tumor Necrosis Factor-alpha pharmacology, Tumor Suppressor Protein p53 genetics, Interferon Regulatory Factor-1 metabolism, Pancreas, Exocrine metabolism, Peptide YY metabolism, Tumor Necrosis Factor-alpha metabolism, Tumor Suppressor Protein p53 metabolism
- Abstract
Background: Cytokine activation in the pancreatitis induces local and systemic cellular damage. Transcription factors interferon regulatory factor-1 (IRF-1) and the tumor suppressor gene p53 collaborate to enhance p21 related cell cycle regulation during pathological disease progression. However, little is known about their role in the pancreas after cytokine challenge. Our laboratory has previously shown that TNF-alpha induces the binding of many transcription factors, including NF-kappa B, and treatment with the gut hormone, Peptide YY (PYY), ameliorates the effects. We hypothesized that TNF-alpha would induce IRF-1 and p53 protein binding in pancreatic acinar cells and that PYY would attenuate the effect., Materials and Methods: Rat pancreatic acinar AR42J cells were treated with rat recombinant TNF-alpha (200 ng/ml). To verify that our model was inducing pancreatitis, alpha-amylase activity was measured in the cell culture supernatant by fluorescence spectroscopy. PYY [3-36] was added at 500 pM 30 min post-TNF treatment; cells were harvested at 2 h for extraction of nuclear protein. Transcription factor binding of IRF-1 and p53 were determined by protein/DNA array analysis using chemiluminescence detection, and relative spot densities were measured by densitometry. A two-fold increase or decrease in density was considered significant., Results: Amylase enzyme activity was significantly (P < 0.05) elevated in the TNF-alpha-treated cells by 2 h. Protein/DNA array analysis revealed significant up-regulation of both IRF-1 and p53 protein in nuclear extracts. Induction by TNF-alpha increased IRF-1 protein binding 3.5-fold, while binding levels of p53 protein increased six-fold. The addition of PYY to TNF-treated cells reduced IRF-1 and p53 binding to control levels., Conclusions: We have shown for the first time that short-term exposure to TNF-alpha induces the binding activity of transcription factors IRF-1 and p53 in rat pancreatic acinar cells, and that addition of PYY reduces it. Regulation of transcription factor activity by PYY may have therapeutic potential in altering the progression of pancreatitis.
- Published
- 2006
- Full Text
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42. Additive effects of Cox-1 and Cox-2 inhibition on breast cancer in vitro.
- Author
-
McFadden DW, Riggs DR, Jackson BJ, and Cunningham C
- Subjects
- Cell Cycle drug effects, Cell Line, Tumor, Cell Proliferation drug effects, Cyclooxygenase 2, Drug Synergism, Female, Humans, Breast Neoplasms enzymology, Cyclooxygenase 1 drug effects, Cyclooxygenase 2 Inhibitors pharmacology, Cyclooxygenase Inhibitors pharmacology, Membrane Proteins antagonists & inhibitors
- Abstract
We hypothesized that combined treatment with Cox-1 and Cox-2 specific inhibitiors would exhibit synergistic effects against breast cancer in vitro. Two human breast cancer cell lines (HTB26, MCF-7) were treated with catechin (Cox-1 inhibitor) or NS398 (Cox-2 inhibitor) at 100 microM as both single and combined treatments. Reductions in cell growth were observed in both cell lines at 24 and 72 h in both single and combined treatments (p<0.001). Combined treatment produced a significantly greater inhibition as compared to single agents alone. Upon cell cycle evaluation, Cox-1 and -2 antagonism increased G1 and G2 phase fractions in MCF-7 cells (p<0.001 and p<0.05 respectively). No additive changes were observed when the two agents were combined. An increase in the G2 phase was observed in the HTB26 cells when treated with NS398 alone (p<0.001). However, a decrease in the S-phase was observed when these cells were treated with NS398, as a single agent (p<0.01) or when the two agents were combined (p<0.01). The significant and additive effects exhibited by the combination of Cox-1 and -2 inhibitors and their effects on cell cycle suggest that these agents could become an effective treatment modality for carcinoma of the breast.
- Published
- 2006
43. Bridging the idiographic-nomothetic divide: a follow-up study.
- Author
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Grice JW, Jackson BJ, and McDaniel BL
- Subjects
- Adolescent, Adult, Female, Follow-Up Studies, Humans, Male, Middle Aged, Personality, Psychology methods, Self Concept, Social Perception
- Abstract
In a replication and extension of Grice (2004), participants in the current study rated themselves and other known individuals on scales constructed from their own personal constructs and on marker items for the Big Five model personality traits. Confirmatory components analyses revealed excellent fit for the Big Five Model when applied to aggregate trait ratings but highly variable fit when applied to participants' individual ratings. Comparisons of the personal construct and trait ratings indicated an approximate average overlap of only 51%, and additional analyses revealed several factors that contributed to the uniqueness of the personal constructs. These findings were discussed in the context of the idiographic-nomothetic distinction drawn in personality psychology.
- Published
- 2006
- Full Text
- View/download PDF
44. Inositol hexaphosphate (IP6) inhibits cellular proliferation in melanoma.
- Author
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Rizvi I, Riggs DR, Jackson BJ, Ng A, Cunningham C, and McFadden DW
- Subjects
- Apoptosis drug effects, Cell Line, Tumor, Humans, Melanoma metabolism, Melanoma pathology, Phytic Acid pharmacology, Vascular Endothelial Growth Factor A metabolism, Cell Proliferation drug effects, Melanoma drug therapy, Phytic Acid therapeutic use
- Abstract
Background: Inositol Hexaphosphate (IP6) is a naturally occurring polyphosphorylated carbohydrate found in food sources high in fiber content. We have previously reported IP6 to have significant inhibitory effects against pancreatic cancer in vitro. We hypothesized that the IP6 would significantly inhibit cell growth of cutaneous melanoma in vitro., Materials and Methods: The melanoma line HTB68 was cultured using standard techniques and treated with IP6 at doses ranging from 0.2 to 1.0 mM/well. Cell viability was measured by MTT at 72 h. VEGF production was measured in the cell supernatants by ELISA. Apoptosis was evaluated by Annexin V-FITC and results calculated using FACS analysis. Statistical analysis was performed by ANOVA., Results: Significant reductions (P < 0.001) in cellular proliferation were observed with IP6. Overall, IP6 exhibited a mean inhibition of cell growth of 52.1 +/- 11.5% (range, 1.6-83.0%) at 72 h of incubation. VEGF production was significantly reduced (P < 0.001) by the addition of IP6 (7.5 pg/ml) compared to control (40.9 pg/ml). IP6 significantly increased (P = 0.029) late apoptosis from 5.3 to 7.0% gated events. No changes in necrosis or early apoptosis were observed., Conclusions: Adjuvant treatment of melanoma continues to challenge clinicians and patients. Our findings that IP6 significantly decreased cellular growth, VEGF production and increased late apoptosis in melanoma suggest its potential therapeutic value. Further in vivo studies are planned to evaluate safety and clinical utility of this agent.
- Published
- 2006
- Full Text
- View/download PDF
45. Inhibition of melanoma growth by hemocyanin occurs via early apoptotic pathways.
- Author
-
Somasundar P, Riggs DR, Jackson BJ, and McFadden DW
- Subjects
- Animals, Apoptosis drug effects, Cell Line, Tumor, Cell Survival drug effects, Dose-Response Relationship, Drug, Flow Cytometry, Humans, In Vitro Techniques, Melanoma drug therapy, Apoptosis physiology, Cell Proliferation drug effects, Hemocyanins pharmacology, Melanoma pathology, Mollusca
- Abstract
Background: We hypothesized that keyhole limpet hemocyanin (KLH) would reduce cellular proliferation and effect apoptosis of melanoma cell lines in vitro., Methods: Two human melanoma cell lines (HTB68 and HTB72) were subjected to a dose-response treatment regimen of KLH (0.4 microg to 100 microg/well). Cell viability was tested by MTT assay (SIGMA, St Louis, MO) at 72 hours. Apoptosis and necrosis were measured by the Annexin V FITC assay (Biovision Inc, Mountain View, CA)., Results: Melanoma cell proliferation was significantly reduced in the HTB68 cell line treated with 6.3 microg or higher doses of KLH. A significant reduction in cell growth was also observed in the HTB72 cells at 50 and 100 microg of KLH. KLH increased early apoptotic activity, whereas both late apoptosis and necrosis were decreased by the addition of KLH., Conclusions: KLH significantly reduces cellular proliferation in vitro in melanoma, via early apoptotic pathways. The results warrant in vivo studies into the effects of KLH in melanoma.
- Published
- 2005
- Full Text
- View/download PDF
46. MAPK and PI3K inhibition reduces proliferation of Barrett's adenocarcinoma in vitro.
- Author
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Vona-Davis L, Frankenberry K, Cunningham C, Riggs DR, Jackson BJ, Szwerc MF, and McFadden DW
- Subjects
- Adenocarcinoma, Apoptosis drug effects, Cell Division drug effects, Cell Line, Tumor, Cell Survival drug effects, Esophageal Neoplasms, Humans, Necrosis, Barrett Esophagus pathology, Butadienes pharmacology, Chromones pharmacology, Enzyme Inhibitors pharmacology, Mitogen-Activated Protein Kinases antagonists & inhibitors, Morpholines pharmacology, Nitriles pharmacology, Phosphoinositide-3 Kinase Inhibitors
- Abstract
Background: Esophageal adenocarcinoma often arises from Barrett's esophagus. Mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase (PI3K) play critical roles in cell survival. We hypothesized that inhibition of these pathways in Barrett's adenocarcinoma would decrease cell proliferation and alter apoptosis in vitro., Materials and Methods: Two Barrett's-associated adenocarcinoma cell lines, SEG-1 (wild-type p53) and BIC-1 (mutant p53), were treated with MAPK (U0126) and PI3K (LY294002) inhibitors at 20 microm concentrations. After 24 and 72 h, cell viability was measured by MTT assay. Apoptosis and necrosis were evaluated by the Annexin V-FITC assay. Statistical analysis was performed by ANOVA., Results: LY294002 and U0126 treatment produced significant reductions (range 15.7 to 62.0%, P < 0.05) in cellular proliferation at both 24 and 72 h in the SEG-1 cells. BIC-1 cell viability was reduced (39.3 to 56.4%, P < 0.05) at 72 h. Both early and late apoptotic activity were significantly increased (P < 0.05) in the SEG-1 cells using both inhibitors. Necrosis was significantly reduced (P < 0.05) using both inhibitors. No changes in either early or late apoptosis or necrosis were observed in the BIC-1 cells., Conclusions: Herein, we report significant antiproliferative effects against Barrett's adenocarcinoma by MAPK and PI3K inhibition in vitro. Pro-apoptotic mechanisms prevail in the wild-type p53 cells. Further investigation is warranted to advance the clinical treatment of this devastating disease.
- Published
- 2005
- Full Text
- View/download PDF
47. Inositol hexaphosphate (IP6): a novel treatment for pancreatic cancer.
- Author
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Somasundar P, Riggs DR, Jackson BJ, Cunningham C, Vona-Davis L, and McFadden DW
- Subjects
- Apoptosis drug effects, Cell Line, Tumor, Cell Proliferation drug effects, Humans, Oryza chemistry, Phytic Acid isolation & purification, Zea mays chemistry, Adenocarcinoma pathology, Adenocarcinoma physiopathology, Pancreatic Neoplasms pathology, Pancreatic Neoplasms physiopathology, Phytic Acid pharmacology
- Abstract
Background: Inositol hexaphosphate (IP6) is a naturally occurring polyphosphorylated carbohydrate found in food sources high in fiber content. IP6 has been reported to have significant inhibitory effects against a variety of primary tumors including breast and colon. The effects of IP6 have not been evaluated in pancreatic cancer. We hypothesized that IP6 would significantly inhibit cell growth and increase the apoptotic rate of pancreatic cancer in vitro., Materials and Methods: Two pancreatic cancer cell lines (MIAPACA and PANC1) were cultured using standard techniques and treated with IP6 at doses of 0.5, 1.0, and 5.0 mm. Cell viability was measured by MTT at 24 and 72 h. Apoptosis was evaluated by Annexin V-FITC and results calculated using FACS analysis. Statistical analysis was performed by ANOVA., Results: Significant reductions (P < 0.01) in cellular proliferation were observed with all IP6 concentrations tested in both cell lines and at both time points. Reductions in cell proliferation ranged from 37.1 to 91.5%. IP6 increased early and late apoptotic activity (P < 0.01)., Conclusions: Treatment of pancreatic cancer with the common dietary polyphosphorylated carbohydrate IP6 significantly decreased cellular growth and increased apoptosis. Our findings suggest that IP6 has the potential to become an effective adjunct for pancreatic cancer treatment. Further in vivo and human studies are needed to evaluate safety and clinical utility of this agent in patients with pancreatic cancer.
- Published
- 2005
- Full Text
- View/download PDF
48. In vitro effects of keyhole limpet hemocyanin in breast and pancreatic cancer in regards to cell growth, cytokine production, and apoptosis.
- Author
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Riggs DR, Jackson BJ, Vona-Davis L, Nigam A, and McFadden DW
- Subjects
- Apoptosis drug effects, Breast Neoplasms prevention & control, Cell Line, Tumor, Female, Humans, In Vitro Techniques, Interleukins metabolism, Male, Pancreatic Neoplasms prevention & control, Tumor Necrosis Factor-alpha metabolism, Adjuvants, Immunologic pharmacology, Breast Neoplasms metabolism, Hemocyanins pharmacology, Pancreatic Neoplasms metabolism
- Abstract
Background: We have previously shown the inhibitory effects of keyhole limpet hemocyanin (KLH) against breast and pancreatic cancer in vitro. We hypothesize that its actions in breast and pancreas cancer cells are via apoptotic or cytokine pathways., Methods: Two breast cancer cell lines, ZR75-1 and MCF-7, and one pancreas cancer cell line, PANC-1, were treated with KLH at 500 mug, 250 mug, and 250 ng/mL. Cell viability, cytokine production, and apoptosis were measured., Results: Significant growth inhibition was observed in all cell lines at all KLH concentrations tested. Significant changes in cytokine production were observed in all cell lines. An increase in early and late apoptotic activity was observed in the MCF-7, whereas a reduction in late apoptotic activity was observed in the ZR75-1 cells., Conclusions: KLH directly inhibits the growth of human breast and pancreas cancer in vitro by apoptotic and nonapoptotic mechanisms.
- Published
- 2005
- Full Text
- View/download PDF
49. The use of laser-welded titanium framework technology: a case report for the totally edentulous patient.
- Author
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Jackson BJ
- Subjects
- Aged, Dental Implants, Dental Impression Technique, Dental Prosthesis, Implant-Supported, Denture Design, Denture, Complete, Lower, Denture, Overlay, Female, Humans, Jaw, Edentulous surgery, Male, Mandible surgery, Middle Aged, Dental Abutments, Dental Soldering methods, Jaw, Edentulous rehabilitation, Lasers, Technology, Dental, Titanium chemistry
- Abstract
Laser-welded technology has become a viable alternative to the conventional lost wax-casting technique in the field of implant dentistry. Studies have demonstrated the predictable nature of laser-welded titanium frameworks for endosseous implants in the partial and totally edentulous patient. A standardized impression and fabrication procedure is required for an accurate and predictable superstructure. More long-term studies are needed for more widespread acceptance and usage by dental practitioners.
- Published
- 2005
- Full Text
- View/download PDF
50. In vitro effects of pentosan polysulfate against malignant breast cells.
- Author
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Zaslau S, Riggs DR, Jackson BJ, Adkins FC, John CC, Kandzari SJ, and McFadden DW
- Subjects
- Analysis of Variance, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Dose-Response Relationship, Drug, Female, Humans, In Vitro Techniques, Probability, Risk Factors, Sensitivity and Specificity, Tumor Cells, Cultured, Apoptosis drug effects, Cell Proliferation drug effects, Pentosan Sulfuric Polyester pharmacology
- Abstract
Background: Pentosan polysulfate (Elmiron); (Alza Pharmaceuticals, Mountain View, CA) is the only Food and Drug Administration-approved oral therapy for interstitial cystitis (IC). Women with IC and breast cancer are often in the same age range; therefore, we hypothesize that pentosan polysulfate may also have a therapeutic effect on breast cancer cells in vitro., Methods: Breast cancer lines MCF-7, ZR75-1, and HTB26 were treated with pentosan polysulfate at various concentrations. Cell viability was measured at 24 hours by MTT. Annexin V assay was used to determine the effect of pentosan polysulfate on apoptotic and necrotic activity., Results: Pentosan polysulfate significantly inhibited the growth of the ZR75-1 cells; however, significant cellular proliferation was observed in the MCF-7 cells. A significant change in late apoptotic activity was observed with pentosan polysulfate treatment in vitro., Conclusions: Caution should be used in prescribing pentosan polysulfate for the treatment of IC in patients who are both in high-risk groups for breast cancer and premenopausal females.
- Published
- 2004
- Full Text
- View/download PDF
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