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1.
Clin Transplant ; 38(7): e15374, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38979724

ABSTRACT

BACKGROUND: The lack of evidence regarding optimal desensitization strategies for lung transplant candidates with preformed donor specific anti-human leukocyte antigen antibodies (DSAs) has led to varying approaches among centers towards this patient group. Our institution's desensitization protocol for recipients with preformed DSAs and negative flow cytometry crossmatch (FCXM) consists of intravenous immunoglobulin (IVIG) as the sole therapy. The study aimed to determine outcomes using this approach. METHODS: This retrospective study included adults who underwent lung-only transplantation for the first time between January 2015 and March 2022 at a single center. We excluded patients with positive or missing FCXM results. Transplant recipients with any DSA ≥ 1000 MFI on latest testing within three months of transplant were considered DSA-positive, while recipients with DSAs <1000 MFI and those without DSAs were assigned to the low-level/negative group. Graft survival (time to death/retransplantation) and chronic lung allograft dysfunction (CLAD)-free times were compared between groups using Cox proportional hazards models. RESULTS: Thirty-six out of 167 eligible patients (22%) were DSA-positive. At least 50% of preformed DSAs had documented clearance (decrease to <1000 MFI) within the first 6 months of transplant. Multivariable Cox regression analyses did not detect a significantly increased risk of graft failure (aHR 1.04 95%CI 0.55-1.97) or chronic lung allograft dysfunction (aHR 0.71 95%CI 0.34-1.52) in DSA-positive patients compared to patients with low-level/negative DSAs. Incidences of antibody-mediated rejection (p = 1.00) and serious thromboembolic events (p = 0.63) did not differ between study groups. CONCLUSION: We describe a single-center experience of administering IVIG alone to lung transplant recipients with preformed DSAs and negative FCXM. Further studies are required to confirm the efficacy of this strategy against other protocols.


Subject(s)
Desensitization, Immunologic , Flow Cytometry , Graft Rejection , Graft Survival , HLA Antigens , Immunoglobulins, Intravenous , Isoantibodies , Lung Transplantation , Tissue Donors , Humans , Female , Male , Retrospective Studies , Middle Aged , Immunoglobulins, Intravenous/therapeutic use , Immunoglobulins, Intravenous/administration & dosage , Graft Rejection/immunology , Graft Rejection/etiology , Isoantibodies/immunology , Isoantibodies/blood , Graft Survival/immunology , HLA Antigens/immunology , Follow-Up Studies , Prognosis , Desensitization, Immunologic/methods , Histocompatibility Testing , Adult , Transplant Recipients , Risk Factors , Immunologic Factors/therapeutic use
2.
Stem Cell Reports ; 2024 Jun 28.
Article in English | MEDLINE | ID: mdl-38996491

ABSTRACT

The effect of consanguinity on identifying universal induced pluripotent stem cell (iPSC) donors, i.e., homozygous for the major human leukocyte antigen (HLA) loci, is unknown. The discovery sample size was calculated in a consanguineous population using a method (1qF) based on the inbreeding coefficient. The result was orders of magnitude smaller compared to the standard method.

3.
J Clin Immunol ; 43(6): 1360-1366, 2023 08.
Article in English | MEDLINE | ID: mdl-37145392

ABSTRACT

BACKGROUND AND AIMS: Subcutaneous immunoglobulin (SCIG) home infusion is widely used as an alternative to intravenous immunoglobulin (IVIG). This study aimed to determine the quality of life (QoL) of patients with primary immunodeficiency (PID) after switching to home-based SCIG. METHODS: In this prospective open-label single-center study, QoL was determined using the validated Arabic version of the Child Health Questionnaire at baseline and 3 and 6 months after switching from IVIG to SCIG. RESULTS: Twenty-four patients were recruited from July 2018 to August 2021, including 14 females and 10 males. The median age of the patients was 5 years (range, 0-14 years). The patients' diagnoses included severe combined immunodeficiency, combined immunodeficiency, agammaglobulinemia, Omenn syndrome, immunodysregulation, hyper-IgE syndrome, common variable immunodeficiency, and bare lymphocyte syndrome. The median duration on IVIG before inclusion was 40 months (range, 5-125 months). The QoL score showed a significant improvement in the patients' global health at 3 and 6 months compared with those at baseline and a significant improvement in the patients' general health at 3 and 6 months compared with that at baseline. The mean baseline serum IgG trough level was 8.8 ± 2.1 g/L. The mean serum IgG level was significantly higher on SCIG at both 3 and 6 months (11.7 ± 2.3 and 11.7 ± 2.5 g/L, respectively). CONCLUSIONS: This is the first study involving an Arab population to show improvement in the QoL of patients with PID after switching from hospital-based IVIG to home-based 20% SCIG.


Subject(s)
Immunologic Deficiency Syndromes , Primary Immunodeficiency Diseases , Male , Female , Humans , Child , Infant, Newborn , Infant , Child, Preschool , Adolescent , Immunoglobulins, Intravenous/therapeutic use , Immunoglobulin G/therapeutic use , Quality of Life , Saudi Arabia , Prospective Studies , Immunologic Deficiency Syndromes/therapy , Immunologic Deficiency Syndromes/drug therapy , Primary Immunodeficiency Diseases/drug therapy , Infusions, Subcutaneous
4.
Clin Exp Gastroenterol ; 14: 45-57, 2021.
Article in English | MEDLINE | ID: mdl-33603433

ABSTRACT

PURPOSE: Over the last decades, the incidence of pancreatic cancer has increased, particularly in countries with a higher socioeconomic status. The present work aimed to provide detailed epidemiological data on the incidence of pancreatic cancer in Saudi Arabia. PATIENTS AND METHODS: In this retrospective descriptive study, the epidemiological data on pancreatic cancer cases diagnosed in 13 administrative regions of Saudi Arabia between January 2004 and December 2015 were extracted from the Saudi Cancer Registry. The frequency, the crude incidence rate (CIR), and the age-standardized incidence rate (ASIR), stratified by geographical region, gender, and the year of diagnosis, were analyzed. RESULTS: From January 2004 to December 2015, a total of 2338 cases of pancreatic cancer were registered, including 1443 males and 895 females. The overall CIR was 1.28/100,000 among males and 0.80/100,000 in females, with an overall ASIR of 2.26 and 1.41/100,000 for males and females, respectively. Higher ASIR and CIR were observed among males than females (ratio 1.6). In both genders, the ASIR of pancreatic cancer increased with increasing age, with the highest incidence in patients aged 70 years or more. The ASIR in the Eastern Region (3.2/100,000) and the regions of Riyadh (3.0/100,000) and Tabuk (2.6/100,000) proved to be significantly higher than in the other regions of the country. Among women, the ASIR was significantly higher in Riyadh (2.3/100,000), the northern region (2.2/100,000), and Tabuk (2.0/100,000). CONCLUSION: This study revealed a slight increase of the CIR and ASIR of pancreatic cancer among males and females of the Saudi population. Eastern region, Riyadh, and Tabuk had the highest overall ASIRs of pancreatic cancer among males, Riyadh, Northern region, and Tabuk among Saudi females. The area least affected by pancreatic cancer was observed in Jazan among male and female Saudis. The rates of pancreatic cancer in Saudi Arabia were significantly higher among males compared with female Saudis. Further analytical studies are needed to identify the potential risk factors for pancreatic cancer among the Saudi population.

5.
Ann Pharmacother ; 55(5): 592-604, 2021 05.
Article in English | MEDLINE | ID: mdl-32959678

ABSTRACT

BACKGROUND: The use of extracorporeal membrane oxygenator (ECMO) support devices are associated with complications, including bleeding and thrombosis. Unfractionated heparin (UFH) is the gold standard anticoagulant in ECMO patients. Clinically, UFH is monitored through activated clotting time (ACT), activated partial thromboplastin time (aPTT), and anti-factor Xa assay. It is unknown which assay best predicts anticoagulation effects in adults. OBJECTIVE: To assess the correlation of UFH dosing and monitoring using an established protocol. METHODS: A pilot, prospective cohort, historically controlled study was conducted at a tertiary care hospital. Patients ≥18 years-old who received ECMO on the multifaceted anticoagulation protocol were included and compared with those on the conventional method of anticoagulation. The primary end point was to assess the correlation between UFH dose and different monitoring methods throughout 72 hours using the new protocol guided by ACT and anti-factor Xa assay. RESULTS: In each arm, 20 patients were enrolled. The study revealed that anti-factor Xa assay had the largest number of "strong" correlations 11/20 (55%), followed by both aPTT and aPTT ratio 10/20 (50%), and, finally, ACT 2/20 (10%). Concordance between anti-factor Xa assay and the other monitoring parameters in the prospective arm was generally low: 31% with aPTT ratio, 26% with ACT, and 23% with aPTT. CONCLUSION AND RELEVANCE: The adaption of a multifaceted anticoagulation protocol using anti-factor Xa assay may provide a better prediction of heparin dosing in adults ECMO patients compared with the conventional ACT-based protocol. Further studies are needed to assess the safety and different monitoring modalities.


Subject(s)
Anticoagulants/administration & dosage , Extracorporeal Membrane Oxygenation/standards , Factor Xa Inhibitors/administration & dosage , Heparin/administration & dosage , Adolescent , Adult , Blood Coagulation/drug effects , Blood Coagulation/physiology , Blood Coagulation Tests/methods , Cohort Studies , Drug Monitoring/methods , Drug Monitoring/standards , Extracorporeal Membrane Oxygenation/methods , Female , Humans , Male , Middle Aged , Partial Thromboplastin Time/methods , Pilot Projects , Prospective Studies , Retrospective Studies , Young Adult
6.
Pharmacoecon Open ; 4(4): 625-633, 2020 Dec.
Article in English | MEDLINE | ID: mdl-32291726

ABSTRACT

BACKGROUND: No willingness-to-pay (WTP) per quality-adjusted life-year (QALY) value exists for the Kingdom of Saudi Arabia (KSA). OBJECTIVE: The primary objective of this study was to determine the WTP for a QALY in the KSA. METHODS: Adult citizens of the KSA, patients with cancer, or members of the general public (MGP) were recruited to participate in a time trade-off survey to elicit health utilities. Cancer was chosen as the disease of interest for patients and the MGP, with a scenario describing stage 3 colorectal cancer, because it is a disease condition that impacts on both quality of life and survival time. In a second step, respondents were asked about their WTP to move from the estimated health state to a state of perfect health for 1 year (QALY). Finally, that amount was processed to generate the WTP for a full QALY. The second step was repeated with a 5-year horizon. Sensitivity analyses were performed without outliers. RESULTS: From 400 participants, data from 378 subjects were obtained and usable: 177 patients, 201 MGP; 278 male, 100 female subjects; 231 aged 26-65 years. Demographic distribution varied widely between the two subgroups for age, education level, and employment status, but with less variation in sex and income. Elicited health utilities were 0.413 (0.472 after adjustment) for the overall group, 0.316 (0.416) for patients, and 0.499 (0.508) for MGP. Overall WTP for a QALY was $US25,600 (adjusted $US32,000) for the 1-year horizon and $US19,200 (adjusted $US22,720) for the 5-year horizon. CONCLUSION: This was the first empirical attempt to estimate the WTP per QALY for the KSA. Results are comparable to those in some other countries and to gross domestic product figures for the KSA. Further research in a country-wide sample is warranted.

7.
Neuropsychiatr Dis Treat ; 15: 2781-2788, 2019.
Article in English | MEDLINE | ID: mdl-31576133

ABSTRACT

BACKGROUND: Antiepileptic drug monotherapy is the mainstay of treatment for epilepsy; however, the efficacy of different antiepileptic drugs in reducing the incidence of seizure-related hospitalization among older adults, who are at higher risk of developing epilepsy compared to their younger counterparts, has not been examined. PURPOSE: The objective of the present study was to compare the rate of seizure-related hospitalization among older adults on levetiracetam compared to different antiepileptic drugs (AEDs). PATIENTS AND METHODS: This was a retrospective cohort study of older adults (≥60 years) in two tertiary care hospitals. Patients who are 60 years of age and older, have a confirmed diagnosis of epilepsy, and are taking a single and the same antiepileptic drug for at least 36 months were included. The patients were followed up for 24 months after 12 months of treatment with no incidence of seizure-related hospitalization via their health records. Multiple Poisson regression with robust error variance was used to estimate the relative risk of hospitalization for patients on levetiracetam compared to different antiepileptic drugs controlling for age, gender, number of prescription medications, dosage strengths, and Charlson Comorbidity Index (CCI) score. RESULTS: One hundred and thirty-six patients met the inclusion criteria and were included in the study. The recruited patients were on one of the following four antiepileptic drugs: carbamazepine (n=44), levetiracetam (n=39), phenytoin (n=31), and valproic acid (n=22). Patients on levetiracetam were more than twice as likely to be hospitalized due to seizures within the 24 months of follow-up compared to their counterparts on other AEDs (RR=2.76, 95% CI=1.16-6.53, P=0.021). CONCLUSION: This study suggests that older adults on old generation AEDs such as phenytoin, carbamazepine, and valproic acid appear to have a lower risk of seizure-related hospitalization compared to their counterparts on levetiracetam.

8.
Ann Pharmacother ; 53(8): 786-793, 2019 08.
Article in English | MEDLINE | ID: mdl-30788973

ABSTRACT

Background: The current CHEST guidelines recommend the use of antithrombotic therapy, either aspirin or warfarin, as a primary thromboembolic complications (TECs) prophylaxis in patients who undergo Fontan procedure, without specification on drug selection or duration of therapy. Objective: To investigate the incidence rate of late TECs, occurring after 1-year post-Fontan procedure and to assess the difference in rate of late TECs between warfarin and aspirin. Methods: A retrospective cohort study included patients who had Fontan procedures between 1985-2010 at our institution. Patients were stratified according to the antithrombotic regimen-warfarin, aspirin, or no therapy-at the time of TECs. Results: We screened 499 patients who underwent Fontan procedures; 431 procedures met the inclusion criteria. Over a median follow-up of 13.6 years (IQR= 8.7), freedom from late TECs at 5, 10, 15, and 20 years was 97.54%, 96.90%, 90.78%, and 88.07%, respectively. There was no difference in late TEC incidence rates per 1000 patient-years between warfarin and aspirin: 7.82 and 5.83 events, respectively; rate ratio= 1.34 (95% CI= 0.68-2.60). Warfarin was associated with a higher major bleeding incidence rate per 1000 patient-years: 3.70 versus 2.91 events with aspirin; rate ratio= 1.27 (95% CI= 0.49 to 3.29). Conclusion and Relevance: The incidence rate of late clinical TECs post-Fontan procedure in our population is low. Warfarin was not superior to aspirin for prevention of late TECs. Yet warfarin was associated with a higher rate of bleeding. This finding suggests a simpler antithrombotic regimen for prevention of TEC after 1-year post-Fontan procedure.


Subject(s)
Fibrinolytic Agents/therapeutic use , Fontan Procedure/adverse effects , Thromboembolism/prevention & control , Aspirin/therapeutic use , Child, Preschool , Female , Fibrinolytic Agents/administration & dosage , Fibrinolytic Agents/adverse effects , Follow-Up Studies , Hemorrhage/drug therapy , Humans , Primary Prevention , Retrospective Studies , Warfarin/therapeutic use
9.
Geriatr Nurs ; 39(6): 669-675, 2018 11.
Article in English | MEDLINE | ID: mdl-29859697

ABSTRACT

The aim of this prospective questionnaire-based cross-sectional study was to examine whether the new generation of Antiepileptic drugs (AEDs) with higher acquisition cost generate lower adverse effects than the old AEDs among a sample of 102 Arabic-speaking older adults (60 years of age or older) with seizure disorders. The mean scores of the Arabic version of the Liverpool Adverse Events Profile (LAEP), which assessed the adverse effects of the AEDs, did not differ between patients taking the old and new generations of AEDs. Despite their 4-fold higher cost, the new generation of AEDs were not characterized by lower LAEP scores of adverse effects. However, higher LAEP scores were associated with better health literacy. In conclusion, the use of new AEDs was not associated with lower self-reported adverse effects scores among Arabic-speaking older adults with seizure disorders despite their higher acquisition costs.


Subject(s)
Anticonvulsants/adverse effects , Anticonvulsants/economics , Drug Costs , Patient Reported Outcome Measures , Aged , Anticonvulsants/therapeutic use , Cross-Sectional Studies , Drug-Related Side Effects and Adverse Reactions/economics , Epilepsy/drug therapy , Female , Humans , Male , Middle Aged , Prospective Studies , Saudi Arabia , Surveys and Questionnaires
10.
Asian Cardiovasc Thorac Ann ; 25(9): 579-585, 2017 Nov.
Article in English | MEDLINE | ID: mdl-29022823

ABSTRACT

Background Cardiac surgery patients are at high risk of medication errors. Resumption of home medications reduces the significance and number of medication errors. This could be achieved by implementing a medication reconciliation program. Patients and Methods Patients were eligible for inclusion in this prospective study if they were admitted, transferred, and/or discharged under cardiac surgery team care from September 2015 to March 2016. The primary outcome was the number and proportion of unintentional medication discrepancies. Secondary outcomes included the number of interventions to resolve discrepancies and their clinical significance, and the medication regimen complexity index and its correlation with discrepancies. Results There were 374 patients included and 1000 encounters tracked. Four-hundred and seventy (47%) of the included encounters were for adult patients. Of the 260 medication discrepancies detected, 181 (69.61%) were detected during admission. Discrepancies among adults were 0.913, 0.307, and 0.176 on admission, transfer, and discharge, respectively. Two-hundred (76.92%) of the interventions recommended by the pharmacy residents were accepted by the medical team, and the remaining were accepted with modifications, with no rejections. One-hundred and sixty-six (83%) of the accepted interventions were of high clinical significance. There was a significant correlation between the number of medication discrepancies and medication regimen complexity index on admission ( p < 0.0001, r = 0.34), transfer, and discharge. Conclusion Implementation of a medication reconciliation program in cardiac surgery units and its step-down units can be a powerful mean of identifying medication errors in post-cardiac surgery patients at admission and throughout the transition of care.


Subject(s)
Cardiac Surgical Procedures , Medication Errors/prevention & control , Medication Reconciliation/methods , Pharmacy Residencies , Pharmacy Service, Hospital , Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Drug Administration Routes , Drug Administration Schedule , Drug Dosage Calculations , Female , Humans , Inappropriate Prescribing , Infant , Infant, Newborn , Interdisciplinary Communication , Male , Medication Errors/adverse effects , Middle Aged , Patient Admission , Patient Care Team , Patient Discharge , Patient Transfer , Polypharmacy , Program Evaluation , Prospective Studies , Risk Factors , Treatment Outcome , Young Adult
11.
Contemp Clin Trials Commun ; 7: 126-129, 2017 Sep.
Article in English | MEDLINE | ID: mdl-29696177

ABSTRACT

The clinical trial is an important type of research design in the spectrum of translational research. The extent to which clinical trials are conducted is a reflection of the level of advancement that exists within a healthcare system. This study aims at describing the clinical trial activity within the Kingdom of Saudi Arabia since 2000 through reviewing those trials that have been registered with clinicaltrials.gov in that time period. Since February 2000, 405 trials have been registered. These trials fall into one of 22 different ICD-10 codes, and with the top four being neoplasms (92), diseases of the circulatory system (57), endocrine, nutritional and metabolic diseases (46), and diseases of the respiratory system (25). About half (200) were classified as trials with both safety and efficacy endpoints. 52% were phase IV and 28% were phase III. About 64% were randomized, and with about equal numbers of those coming from industry (86) and university sponsors (85), and smaller numbers coming from hospitals (51) and other sponsors. A total of 24 phase III university- or hospital-sponsored trials have been registered during the 15-year time period. With a population approaching 30 million and very large annual healthcare expenses, it would appear that the level of clinical trial activity within the Kingdom during the past 15 years has been rather paltry. The emphasis has been on post-marketing phase IV trials. The academic setting (i.e. universities and hospitals) has seen a new trial registered every 11 months on average.

12.
Proc (Bayl Univ Med Cent) ; 27(1): 12-5, 2014 Jan.
Article in English | MEDLINE | ID: mdl-24381393

ABSTRACT

The levels of sedation required for patients to comfortably undergo colonoscopy with propofol were examined. One hundred patients undergoing colonoscopy with propofol were enrolled. In addition to standard-of-care monitoring, sedation level was monitored with the Patient State Index (PSI) obtained from a brain function monitor, transcutaneous carbon dioxide (tcpCO2) was monitored with the TCM TOSCA monitor, and end-tidal carbon dioxide was monitored via nasal cannula. The Ramsay Sedation Score (RSS) was also assessed and recorded. After baseline data were obtained from the first 40 consecutive patients enrolled in the study, the remaining 60 patients were randomized into two groups. In one group the PSI value was blinded from the anesthesiologist and in the second group the PSI was visible and the impact of this information on the management of the sedation was analyzed. Overall 96% of patients reached levels of deep sedation and 89% reached levels of general anesthesia. When comparing the blinded to PSI versus unblinded groups, the blinded group had a significantly lower PSI and higher RSS and tcpCO2, indicating the blinded group was maintained at a deeper sedation level with more respiratory compromise than the unblinded group. Patients undergoing colonoscopy under propofol sedation delivered by a bolus technique are frequently taken to levels of general anesthesia and are at risk for respiratory depression, airway obstruction, and hemodynamic compromise.

13.
Cell Transplant ; 20(7): 1127-37, 2011.
Article in English | MEDLINE | ID: mdl-21092403

ABSTRACT

Conflicting results have been reported on the effectiveness of the two-layer method (TLM) compared with the University of Wisconsin (UW) method for preserving pancreata. The objective of this study was to compile the evidence for or against any difference in human islet yield and viability between these two. PubMed (January 2000 to May 2008) and Cochran Library searches were performed and 17 studies were included for the meta-analysis. Data on donor characteristics, preservation time, and outcomes were abstracted. Studies were subgrouped based on how TLM was used (UW + TLM or TLM alone), on mean cold ischemic time (CIT) (>20 h or <20 h), and on whether special chemical was used (yes or no). Meta-analysis of all studies and subgroups was performed and the pooled standardized mean differences (SMD) with 95% confidence intervals (CI) were reported. Overall, the use of TLM significantly increased islet yield [SMD, 0.74 (0.44-1.04)] and viability [SMD, 0.63 (0.14-1.12)]. The beneficial effects of TLM on islet yield were more evident when TLM was used following UW storage or when prolonged CIT was used. TLM used alone, shorter CIT, and no chemical use all resulted in similar islet viability between TLM and UW groups. Beneficial effects of TLM on islet viability were demonstrated only when TLM was used following UW storage, or with prolonged CIT, or with chemical use. In conclusion, the TLM was beneficial for prolonged pancreas preservation before human islet isolation; however, benefit of the TLM for short-term preservation was not clear.


Subject(s)
Islets of Langerhans Transplantation , Organ Preservation Solutions/pharmacology , Organ Preservation , Pancreas/drug effects , Adenosine/pharmacology , Allopurinol/pharmacology , Cell Survival , Glutathione/pharmacology , Humans , Insulin/pharmacology , Islets of Langerhans/cytology , PubMed , Raffinose/pharmacology , Time Factors
14.
Ann Surg Oncol ; 17 Suppl 3: 233-41, 2010 Oct.
Article in English | MEDLINE | ID: mdl-20853039

ABSTRACT

BACKGROUND: In 2008, the American Society for Breast Surgeons launched its Mastery in Breast Surgery Pilot Program to demonstrate feasibility of a Web-based tool for breast surgeons to document and monitor quality outcomes. METHODS: Participating surgeons report performance of three quality measures for breast procedures: Was a needle biopsy performed to evaluate the breast lesion before the procedure? Was the surgical specimen oriented? For nonpalpable lesions localized with image guidance, was there intraoperative confirmation of removal? Data are collected through the American Society for Breast Surgeons' Web-based software using a secure server and encrypted identification numbers. Surgeon demographic/practice characteristic data were collected, and logistic regression models were used to identify factors that affected quality measures. RESULTS: From October 2008 to December 2009, a total of 696 surgeons entered data for 28,798 breast procedures. Participants were diverse in years in practice, geographic location, practice setting and type, and proportion of practice made up of breast procedures. Delivery of "optimal care" (defined as delivery of all quality measures for which there was no valid clinical reason for nonperformance) was high for all surgeon demographic/practice characteristics, ranging from 81% to 94%. Statistically significant differences in delivery of quality measures were observed within all physician demographic/practice characteristic variables, but many absolute differences were small. CONCLUSIONS: The high level of participation and volume of breast procedures for which quality measure data was entered demonstrate this is a feasible means of collecting quality performance data. Future development will include identifying/developing additional quality measures and establishing evidence-based benchmarks for care on the basis of data collected.


Subject(s)
Breast Neoplasms/surgery , Mastectomy/statistics & numerical data , Practice Patterns, Physicians'/statistics & numerical data , Quality Indicators, Health Care/statistics & numerical data , Breast Neoplasms/pathology , Delivery of Health Care/statistics & numerical data , Feasibility Studies , Female , Humans , Pilot Projects , Societies, Medical , Treatment Outcome
15.
Carcinogenesis ; 29(1): 139-46, 2008 Jan.
Article in English | MEDLINE | ID: mdl-17999988

ABSTRACT

UNLABELLED: The Mediterranean diet is rich in extra virgin olive oil (EVOO) and associated with a lower incidence of colorectal cancer. EVOO contains phenolic extracts with potential anticarcinogenic activity. AIM: To assess the anticancer properties of EVOO phenolic extracts using in vitro models. METHODS: Phenolic profiles of two different EVOOs (A and B) were determined. RKO and HCT116 (both p53 proficient), SW480 (p53 mutant) and HCT116(p53-/-) (p53 knocked out) cell lines were treated with EVOO extracts and assessed for cell viability. Apoptosis was determined by terminal deoxynucleotidyl transferase nick end labeling (TUNEL) assay and changes in Bax transcript levels. Cell cycle analysis was determined by flow cytometry and western blots. To confirm the data, analysis of cell viability and cell cycle was performed with purified pinoresinol. RESULTS: Chemical characterization showed that pinoresinol is the main phenol in EVOO-A, and oleocanthal predominates in EVOO-B. Only EVOO-A affected cell viability, which was significantly more pronounced in p53-proficient cells. At a concentration of 200 nM, p53-proficient cells showed increased apoptosis and G(2)/M arrest. In p53-proficient cells, ataxia telangiectasia mutated (ATM) and its downstream-controlled proteins were upregulated after treatment, with a parallel decrease of cyclin B/cdc2. Identical results on cell viability and cell cycle were obtained with purified pinoresinol, but this required a higher concentration than in EVOO-A. CONCLUSION: Our results demonstrate that pinoresinol-rich EVOO extracts have potent chemopreventive properties and specifically upregulate the ATM-p53 cascade. This result was achieved at substantially lower concentrations in EVOO than with purified pinoresinol, indicating a possible synergic effect between the various polyphenols in olive oil.


Subject(s)
Anticarcinogenic Agents/pharmacology , Cell Cycle Proteins/metabolism , Colonic Neoplasms/metabolism , DNA-Binding Proteins/metabolism , Furans/pharmacology , Lignans/pharmacology , Plant Oils/pharmacology , Protein Serine-Threonine Kinases/metabolism , Tumor Suppressor Protein p53/metabolism , Tumor Suppressor Proteins/metabolism , Ataxia Telangiectasia Mutated Proteins , Blotting, Western , Cell Line, Tumor , Colonic Neoplasms/pathology , Flow Cytometry , Humans , In Situ Nick-End Labeling , Olive Oil , Plant Oils/chemistry
16.
J Nutr ; 137(12): 2622-8, 2007 Dec.
Article in English | MEDLINE | ID: mdl-18029474

ABSTRACT

The CpG island methylator phenotype is characterized by DNA hypermethylation in the promoters of tumor suppressor genes with silencing of transcription. Hypermethylation of the promoter of hMLH1 and subsequent microsatellite instability occurs in approximately 12% of sporadic colorectal cancers (CRC). Annurca apple, a variety of southern Italy, is rich in polyphenols that are associated with anticancer properties. Populations in southern Italy have lower incidences of CRC than elsewhere in the western world. We evaluated the mechanisms of putative anticancer effects of Annurca polyphenol extract (APE) in in vitro models of CRC. We extracted polyphenols from Annurca apples and treated RKO, SW48, and SW480 cells with APE and assessed the cell viability, apoptosis, and cell cycle. DNA methylation of selected tumor suppressor genes was evaluated after treatment with APE and was compared with the synthetic demethylating agent 5-aza-2'deoxycytidine (5-aza-2dC). DNA methyltransferase (DNMT)-1 and -3b levels were evaluated. Decreased cell viability and induction of apoptosis was evident after treatment. We found no significant changes in cell cycle dynamics. We observed significant increases of p53 protein expression in RKO after treatment. APE treatment strongly reduced DNA methylation in the promoters of hMLH1, p14(ARF), and p16(INK4a) with consequent restoration of normal expression. These effects were qualitatively comparable with those obtained with 5-aza-2dC. We observed a significant reduction in expression of DNMT proteins after treatment without changes in messenger RNA. In conclusion, APE have potent demethylating activity through the inhibition of DNMT proteins. The lack of toxicity in Annurca extracts makes them excellent candidates for the chemoprevention of CRC.


Subject(s)
Colorectal Neoplasms/genetics , DNA Methylation/drug effects , Flavonoids/pharmacology , Gene Expression Regulation, Neoplastic/drug effects , Gene Silencing , Genes, Tumor Suppressor , Malus/chemistry , Phenols/pharmacology , Antineoplastic Agents, Phytogenic/pharmacology , Cell Cycle/drug effects , Cell Line, Tumor , DNA (Cytosine-5-)-Methyltransferase 1 , DNA (Cytosine-5-)-Methyltransferases/antagonists & inhibitors , Flavonoids/chemistry , Gene Silencing/drug effects , Humans , Phenols/chemistry , Plant Extracts/chemistry , Plant Extracts/pharmacology , Polyphenols , Tumor Suppressor Proteins/genetics , DNA Methyltransferase 3B
17.
J Pediatr Gastroenterol Nutr ; 45(2): 213-21, 2007 Aug.
Article in English | MEDLINE | ID: mdl-17667718

ABSTRACT

BACKGROUND: Short bowel syndrome (SBS) develops after massive small bowel resections. Patients with less than 12 cm of jejunoileum have a slim possibility of being weaned from parenteral nutrition (PN). PATIENTS AND METHODS: In a retrospective review of records of consecutive patients with SBS, 8 patients were evaluated for treatment by adaptation and weaning from PN. These included 4 patients with class I SBS (0-10 cm of small bowel), one with class II SBS (>10-25 cm), one with class III SBS (>25-50 cm), and 2 with class IV SBS (>50-75 cm). Adaptation was assessed by measuring growth in the small bowel and the ability to be weaned from PN. RESULTS: Adaptation was achieved primarily by extending the length of jejunoileum by approximately 450% over the first 2.5 years after resection and by increasing the degree of colonic fermentation and absorption of nutrients. As of July 1, 2005, all of the patients were off PN, with the exception of 2 patients with class I-A SBS: patient 3 had a remaining jejunoileum of only 2.5 cm and patient 4 had a remaining jejunoileum of 9 cm but developed eosinophilic enterocolitis. These 2 patients continued with PN on alternate months. CONCLUSIONS: Bowel growth after massive small bowel resection provides an objective parameter of adaptation and a means of predicting ability to be weaned from PN. Aggressive nutritional support makes even patients with class I SBS, whose disease was previously considered hopeless, likely candidates to achieve freedom from PN.


Subject(s)
Adaptation, Physiological , Infant Nutritional Physiological Phenomena , Parenteral Nutrition , Short Bowel Syndrome/pathology , Short Bowel Syndrome/surgery , Colon/metabolism , Colon/microbiology , Colon/pathology , Duodenum/metabolism , Duodenum/pathology , Female , Fermentation , Humans , Infant , Intestinal Absorption , Male , Parenteral Nutrition/adverse effects , Prognosis , Retrospective Studies , Severity of Illness Index , Short Bowel Syndrome/mortality , Treatment Outcome
18.
N Engl J Med ; 346(12): 891-5, 2002 Mar 21.
Article in English | MEDLINE | ID: mdl-11907288

ABSTRACT

BACKGROUND: Whereas certain oral antifungal azoles are well documented to have activity against leishmania, data on the efficacy of fluconazole for leishmaniasis are limited. We conducted a controlled trial in Saudi Arabia of fluconazole for the treatment of cutaneous leishmaniasis caused by Leishmania major. METHODS: This randomized, double-blind, placebo-controlled trial assessed the efficacy of oral fluconazole, in a dose of 200 mg daily for six weeks, in the treatment of parasitologically confirmed cutaneous leishmaniasis. The primary outcome measure was the time to the complete healing of all lesions. RESULTS: A total of 106 patients were assigned to receive fluconazole, and 103 patients were assigned to receive placebo. Follow-up data were available for 80 and 65 patients, respectively. At the three-month follow-up, healing of lesions was complete for 63 of the 80 patients in the fluconazole group (79 percent) and 22 of the 65 patients in the placebo group (34 percent; relative risk of complete healing, 2.33 [95 percent confidence interval, 1.63 to 3.33]). According to an intention-to-treat analysis, the rates of healing were 59 percent and 22 percent, respectively (relative risk, 2.76 [95 percent confidence interval, 1.84 to 4.12]). Sodium stibogluconate was offered to 11 patients in the fluconazole group who returned for follow-up (14 percent) and 33 of those in the placebo group (51 percent) in whom oral treatment was judged to have failed. According to a Kaplan-Meier analysis, the time to healing was shorter for the fluconazole group (median, 8.5 weeks, as compared with 11.2 weeks in the placebo group; P<0.001 by the log-rank test). Side effects were mild and similar in both groups. CONCLUSIONS: A six-week course of oral fluconazole is a safe and useful treatment for cutaneous leishmaniasis caused by L. major.


Subject(s)
Antifungal Agents/therapeutic use , Fluconazole/therapeutic use , Leishmania major , Leishmaniasis, Cutaneous/drug therapy , Adult , Animals , Antifungal Agents/administration & dosage , Double-Blind Method , Endemic Diseases , Female , Fluconazole/administration & dosage , Follow-Up Studies , Humans , Leishmaniasis, Cutaneous/epidemiology , Leishmaniasis, Cutaneous/parasitology , Male , Multivariate Analysis , Proportional Hazards Models , Saudi Arabia/epidemiology , Time Factors , Treatment Outcome
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