51
|
Zhou X, Teng B, Mustafa S. Gender Difference in Coronary Endothelial Dysfunction in ApoE Knockout Mouse Atherosclerosis Model: Role of NO and A
2A
Adenosine Receptor. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.627.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
52
|
Mustafa S, Hussain SY, Ahmad R. Phosphate/Hydroxide Exchange Studies on Amberlite IRA-400. SOLVENT EXTRACTION AND ION EXCHANGE 2014. [DOI: 10.1080/07366299.1990.11073616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
53
|
Mahmood T, Din S, Naeem A, Tasleem S, Alum A, Mustafa S. Kinetics, equilibrium and thermodynamics studies of arsenate adsorption from aqueous solutions onto iron hydroxide. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
54
|
Mustafa S, Elgazzar A. Influence of chronic exposure to cold environment on thyroid gland function in rabbits. Horm Metab Res 2014; 46:546-9. [PMID: 24446160 DOI: 10.1055/s-0033-1363284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Chronic exposure to cold can affect the thyroid gland. However, the effect on thyroid gland perfusion images and the ratio between thyroid hormones secretion were not addressed in any previous study. The present study investigates the effects of chronic cold exposure on thyroid gland function using radionuclide tracer and thyroid hormones secretion concentration. New Zealand white rabbits weighing approximately 1.8-2 kg were kept in a cold room (4°C) for 7 weeks. Thyroid scintigraphy was performed for cold exposed rabbits and a control rabbit group. Each rabbit was injected with 115 MBq (3.1 mCi) technetium-99m pertechnetate (99mTc pertechnetate). Studies were performed using Gamma camera equipped with a low energy, high resolution, pinhole collimator interfaced with a computer. Static images were acquired 20 min after administration of the radiotracer. Rabbits chronically exposed to cold had less body weights than control. Thyroid gland uptake is higher in rabbits chronically exposed to cold than controls using radionuclide perfusion study. The increase was proportional to the time period, so the increase after 7 weeks was greater than 5 weeks. There is also an increase in free triiodothyronine (FT3) and a decrease in free thyroxine (FT4) values. Our results indicate that thyroid gland uptake is higher in rabbits chronically exposed to cold than control and the increase was proportional to the duration. The decrease in rabbit body weights may be related to the increase in metabolism due to the increase of thyroid hormones. Chronic cold exposure also increased the conversion of T4 to T3, which is more potent in thermogenic effect.
Collapse
|
55
|
Nasr IH, Papineni McIntosh A, Mustafa S, Cronin A. Professional knowledge of accident and emergency doctors on the management of dental injuries. COMMUNITY DENTAL HEALTH 2013; 30:234-240. [PMID: 24575526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Accident and emergency (A&E) doctors are often the first to assess dental and dento-alveolar injuries. Early diagnosis and appropriate management is essential for a good long-term prognosis of restored dental aesthetics and function. OBJECTIVE To evaluate A&E doctors' knowledge of the management of dental injuries, and appropriate onward referral. DESIGN AND SETTING A cross-sectional survey using a questionnaire sent to A&E doctors of all grades at all nine A&E hospitals in South Wales over a consecutive five-month period. METHOD Data relating to the level of knowledge of emergency management of dental trauma were analysed. The relationship between doctor's level of experience and previous training received on the management of common dento-alveolar trauma was considered. Data were analysed for Pearson correlation coefficients. RESULTS The response rate to the questionnaire was 72% (n = 118). There was a negligible correlation between the career grade of the doctors and their knowledge of the management of dental injuries (r = 0.128, p < 0.001). A strong positive linear correlation (r = 0.928, p < 0.001) was found between those with prior training and their knowledge of dental injury management. CONCLUSIONS The findings from this study suggest that A&E doctors have only partial knowledge of the management of dental injuries, though appropriate training can significantly increase knowledge.
Collapse
|
56
|
Ban J, Ramkumar D, Tariq M, Mustafa S. The role of ultrasound scanning of the neck in pre-operative staging of cutaneous squamous-cell carcinoma of the head and neck. Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
57
|
Lee HY, Chai LC, Pui CF, Mustafa S, Cheah YK, Nishibuchi M, Radu S. Formation of biofilm by Listeria monocytogenes ATCC 19112 at different incubation temperatures and concentrations of sodium chloride. Braz J Microbiol 2013; 44:51-5. [PMID: 24159283 PMCID: PMC3804177 DOI: 10.1590/s1517-83822013005000004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 09/30/2012] [Indexed: 12/04/2022] Open
Abstract
Biofilm formation can lead to various consequences in the food processing line such as contamination and equipment breakdowns. Since formation of biofilm can occur in various conditions; this study was carried out using L. monocytogenes ATCC 19112 and its biofilm formation ability tested under various concentrations of sodium chloride and temperatures. Cultures of L. monocytogenes ATCC 19112 were placed in 96-well microtitre plate containing concentration of sodium chloride from 1–10% (w/v) and incubated at different temperature of 4 °C, 30 °C and 45 °C for up to 60 h. Absorbance reading of crystal violet staining showed the density of biofilm formed in the 96-well microtitre plates was significantly higher when incubated in 4 °C. The formation of biofilm also occurs at a faster rate at 4 °C and higher optical density (OD 570 nm) was observed at 45 °C. This shows that storage under formation of biofilm that may lead to a higher contamination along the processing line in the food industry. Formation of biofilm was found to be more dependent on temperature compared to sodium chloride stress.
Collapse
|
58
|
Hamzah A, Wong KK, Hasan FN, Mustafa S, Khoo KS, Sarmani SB. Determination of total arsenic in soil and arsenic-resistant bacteria from selected ground water in Kandal Province, Cambodia. J Radioanal Nucl Chem 2013. [DOI: 10.1007/s10967-012-2388-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
59
|
Ali ME, Hashim U, Kashif M, Mustafa S, Che Man YB, Abd Hamid SB. Development of swine-specific DNA markers for biosensor-based halal authentication. GENETICS AND MOLECULAR RESEARCH 2012; 11:1762-72. [PMID: 22843053 DOI: 10.4238/2012.june.29.9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The pig (Sus scrofa) mitochondrial genome was targeted to design short (15-30 nucleotides) DNA markers that would be suitable for biosensor-based hybridization detection of target DNA. Short DNA markers are reported to survive harsh conditions in which longer ones are degraded into smaller fragments. The whole swine mitochondrial-genome was in silico digested with AluI restriction enzyme. Among 66 AluI fragments, five were selected as potential markers because of their convenient lengths, high degree of interspecies polymorphism and intraspecies conservatism. These were confirmed by NCBI blast analysis and ClustalW alignment analysis with 11 different meat-providing animal and fish species. Finally, we integrated a tetramethyl rhodamine-labeled 18-nucleotide AluI fragment into a 3-nm diameter citrate-tannate coated gold nanoparticle to develop a swine-specific hybrid nanobioprobe for the determination of pork adulteration in 2.5-h autoclaved pork-beef binary mixtures. This hybrid probe detected as low as 1% pork in deliberately contaminated autoclaved pork-beef binary mixtures and no cross-species detection was recorded, demonstrating the feasibility of this type of probe for biosensor-based detection of pork adulteration of halal and kosher foods.
Collapse
|
60
|
Shah KH, Mustafa S, Waseem M, Naeem A. Chromium (III) removal by microporous ion exchanger Amberlite.120 (Na+): kinetic, equilibrium and thermodynamic studies. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2012. [DOI: 10.1007/s13738-012-0106-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
61
|
Rashid H, Abdel-Moniem A, Email S, El-Batran M, Rashid H, Mansour H, Mahmoud S, Ashour Z, Mustafa S, Khodeer SA, Abdu-Allah AM, Al-Assal M, Rashid HK, Ghosh Dastidar A, Garg P, West J, Muthusamy R, Gunn J, Zhu F, Lee A, Chee YE, Li ZJ, Kang CS, Chen ZY, Zhang YX, Zhao ZX, Song Q, Rong Y, Bao W, Shan ZL, Rong S, Wang D, Yao P, Liu LG, Zhu LX, Ho SC, Ruan GQ, Xie Q, Sit JWH, Yang YL, Chan MCH, Hu M, Chan TYK, Tomlinson B, Wu HS, Wang LS, Qin J, Wong TT, Heng PA, Yu CM, Luis SA, Luis CR, Habibian M, Courtney A, Hamilton-Craig C, Strugnell W, Poon K, Slaughter R, Raffel OC, Raffel OC, Luis SA, Hansen M, Slaughter R, Hamilton-Craig C, Liang Y, Bai Y, Chen T, Feng GX, Yang YM, Wang XY, Yang YJ, Zhu J, Al-Mohammadi M, Hersi A, Alhabib KF, Alsheikh-Ali AA, Sulaiman K, Alfaleh H, Alsaif S, Almahmeed W, Asaad N, Amin H, Al-Motarreb A, Al-Suwaid J, Blanco JRF, Velasco AB, Mancera J, Francisco A, CA, Zhuravlyova L, Lopina N, Song HH, Xu SH, Huang MZ, Xu CS, Xie LD, Ko B, Cameron J, Seneviratne S, Leung M, Antonis P, Koutsoubos J, Malaiapan Y, Meredith I, Capros N, Istrati V, Matcovschi S, Dumitras T, Istrati S, Nicolenco I, Hotineanu R, Manea D, Gherman O, Hsiung MC, Ko CH, Wei J, Tung TH, Graham CA, Chan JWM, Rotherary KR, Rainer TH, Yan B, Liu M, Huang XR, Li RJ, Lam YY, Yu CM. P033 * Evaluation of myocardial function in patients with chronic stable angina and apparent normal ventricular function (tissue doppler study before and after PCI). Eur Heart J Suppl 2012. [DOI: 10.1093/eurheartj/sur025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
62
|
Faridnia F, Hussin ASM, Saari N, Mustafa S, Yee LY, Manap MYA. In vitro binding of mutagenic heterocyclic aromatic amines by Bifidobacterium pseudocatenulatum G4. Benef Microbes 2011; 1:149-54. [PMID: 21831754 DOI: 10.3920/bm2009.0035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Consumption of probiotics has been associated with decreased risk of colon cancer and reported to have antimutagenic/ anti-carcinogenic properties. One possible mechanism for this effect involves physical binding of the mutagenic compounds, such as heterocyclic amines (HCAs), to the bacteria. Therefore, the objective of this study was to examine the binding capacity of bifidobacterial strains of human origin on mutagenic heterocyclic amines which are suspected to play a role in human cancers. In vitro binding of the mutagens Trp-p-2, IQ, MeIQx, 7,8DiMeIQx and PhIP by three bacterial strains in two media of different pH was analysed using high performance liquid chromatography. Bifidobacterium pseudocatenulatum G4 showed the highest decrease in the total HCAs content, followed by Bifidobacterium longum, and Escherichia coli. pH affects binding capacity; the highest binding was obtained at pH 6.8. Gram-positive tested strains were found to be consistently more effective than the gram-negative strain. There were significant decreases in the amount of HCAs in the presence of different cell concentrations of B. pseudocatenulatum G4; the highest decrease was detected at the concentration of 10(10) cfu/ml. The results showed that HCAs were able to bind with all bacterial strains tested in vitro, thus it may be possible to decrease their absorption by human intestine and increase their elimination via faeces.
Collapse
|
63
|
Ali ME, Hashim U, Dhahi TS, Mustafa S, Man YBC, Latif MA. Analysis of Pork Adulteration in Commercial Burgers Targeting Porcine-Specific Mitochondrial Cytochrome B Gene by TaqMan Probe Real-Time Polymerase Chain Reaction. FOOD ANAL METHOD 2011. [DOI: 10.1007/s12161-011-9311-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
64
|
Ali ME, Hashim U, Mustafa S, Che Man YB. Swine-Specific PCR-RFLP Assay Targeting Mitochondrial Cytochrome B Gene for Semiquantitative Detection of Pork in Commercial Meat Products. FOOD ANAL METHOD 2011. [DOI: 10.1007/s12161-011-9290-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
65
|
Yahaya N, Din SW, Ghazali MZ, Mustafa S. Primary thyroid lymphoma with elevated free thyroxine level. Singapore Med J 2011; 52:e173-e176. [PMID: 21947158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Primary thyroid lymphoma (PTL) is a rare form of thyroid cancer that is known to be associated with Hashimoto thyroiditis. This association is supported by the presence of elevated titres of both antithyroglobulin and antimicrosomal antibodies in up to 95 percent of patients with PTL. Most patients with PTL present with a rapidly enlarging neck mass and compressive symptoms. The majority of thyroid cancer patients have normal levels of thyroid hormones; they are rarely hyperthyroid, with no obvious clinical features of thyrotoxicosis. We describe a patient who presented with minimal clinical features of thyrotoxicosis despite having markedly elevated serum free thyroxine and suppressed serum thyroid-stimulating hormone levels.
Collapse
|
66
|
Shapawi R, Mustafa S, Ng W. A Comparison of the Growth Performance and Body Composition of the Humpback Grouper, Cromileptes altivelis Fed on Farm-made Feeds, Commercial Feeds or Trash Fish. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/jfas.2011.523.534] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
67
|
Bayoumi S, Mustafa S, Drake D. Senior SHO in OMFS, a step towards the new CT3 post. Br J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.bjoms.2011.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
68
|
Ali ME, Hashim U, Mustafa S, Man YBC, Yusop MHM, Bari MF, Islam KN, Hasan MF. Nanoparticle sensor for label free detection of swine DNA in mixed biological samples. NANOTECHNOLOGY 2011; 22:195503. [PMID: 21430321 DOI: 10.1088/0957-4484/22/19/195503] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We used 40 ± 5 nm gold nanoparticles (GNPs) as colorimetric sensor to visually detect swine-specific conserved sequence and nucleotide mismatch in PCR-amplified and non-amplified mitochondrial DNA mixtures to authenticate species. Colloidal GNPs changed color from pinkish-red to gray-purple in 2 mM PBS. Visually observed results were clearly reflected by the dramatic reduction of surface plasmon resonance peak at 530 nm and the appearance of new features in the 620-800 nm regions in their absorption spectra. The particles were stabilized against salt-induced aggregation upon the adsorption of single-stranded DNA. The PCR products, without any additional processing, were hybridized with a 17-base probe prior to exposure to GNPs. At a critical annealing temperature (55 °C) that differentiated matched and mismatched base pairing, the probe was hybridized to pig PCR product and dehybridized from the deer product. The dehybridized probe stuck to GNPs to prevent them from salt-induced aggregation and retained their characteristic red color. Hybridization of a 27-nucleotide probe to swine mitochondrial DNA identified them in pork-venison, pork-shad and venison-shad binary admixtures, eliminating the need of PCR amplification. Thus the assay was applied to authenticate species both in PCR-amplified and non-amplified heterogeneous biological samples. The results were determined visually and validated by absorption spectroscopy. The entire assay (hybridization plus visual detection) was performed in less than 10 min. The LOD (for genomic DNA) of the assay was 6 µg ml(-1) swine DNA in mixed meat samples. We believe the assay can be applied for species assignment in food analysis, mismatch detection in genetic screening and homology studies between closely related species.
Collapse
|
69
|
Che Kadir S, Mustaffa BE, Ghazali Z, Hasan Z, Imisairi AH, Mustafa S. Mediastinal parathyroid adenoma: diagnostic and management challenges. Singapore Med J 2011; 52:e70-e74. [PMID: 21552777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Primary hyperparathyroidism due to ectopic parathyroid adenomas can pose diagnostic and management challenges, especially when imaging studies have localised the lesions to different sites. We report a case of symptomatic hypercalcaemia due to a mediastinal parathyroid adenoma. Ultrasonography identified a nodule posterior to the right thyroid gland. However, computed tomography and technetium-99m sestamibi scintigraphy revealed an ectopic parathyroid adenoma located in the anterior mediastinum. The adenoma was successfully removed through a median sternotomy. However, postoperatively, the patient developed prolonged symptomatic hypocalcaemia, possibly due to suppression of the normal parathyroid gland function, although the presence of concomitant hungry bone syndrome was possible. The histopathology of the mediastinal mass was consistent with a parathyroid adenoma.
Collapse
|
70
|
Mahmood T, Saddique MT, Naeem A, Mustafa S, Dilara B, Raza ZA. Cation exchange removal of Cd from aqueous solution by NiO. JOURNAL OF HAZARDOUS MATERIALS 2011; 185:824-828. [PMID: 21030150 DOI: 10.1016/j.jhazmat.2010.09.094] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 09/09/2010] [Accepted: 09/26/2010] [Indexed: 05/30/2023]
Abstract
Detailed adsorption experiments of Cd from aqueous solution on NiO were conducted under batch process with different concentrations of Cd, time and temperature of the suspension. The solution pH is found to play a decisive role in the metal ions precipitation, surface dissolution and adsorption of metal ions onto the NiO. Preliminary adsorption experiments show that the selectivity of NiO towards different divalent metal ions follows the trend Pb>Zn>Co>Cd, which is related to their first hydrolysis equilibrium constant. The exchange between the proton from the NiO surface and the metal from solution is responsible for the adsorption. The cation/exchange mechanism essentially remains the same for Pb, Zn, Co and Cd ions. The sorption of Cd on NiO particles is described by the modified Langmuir adsorption isotherms. The isosteric heat of adsorption (ΔH) indicates the endothermic nature of the cation exchange process. Spectroscopic analyses provide evidence that Cd is chemisorbed onto the surface of NiO.
Collapse
|
71
|
Hashmi M, Siddiqi S, Mustafa S, Siddiqi K, Ahmed N, Ahmed N, Shohab F. A twist of fate with a turn of neck. CASE REPORTS 2010. [DOI: 10.1136/bcr.01.2010.2646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
72
|
Netzer I, Mustafa S, Lowenstein L. Female sexual function and gynecological disorders. MINERVA GINECOLOGICA 2010; 62:467-482. [PMID: 20938430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Female sexual dysfunction is a common problem among the general population. Indifferent from males is not dependent solely on the physiological function of the genital organs. Partnership, body image perception and other physiological factors play a crucial role in the evaluation and treatment of female sexual dysfunction (FSD). The following article revise the most current literature regarding common gynecological disease and its association with sexual function.
Collapse
|
73
|
Ferguson R, Merrifield D, Harper G, Rawling M, Mustafa S, Picchietti S, Balcázar J, Davies S. The effect of Pediococcus acidilactici on the gut microbiota and immune status of on-growing red tilapia (Oreochromis niloticus). J Appl Microbiol 2010; 109:851-62. [DOI: 10.1111/j.1365-2672.2010.04713.x] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
74
|
Mustafa S, Misbahud D, Sammad YH, Zaman MI, Sadullah K. Sorption Mechanism of Cadmium from Aqueous Solution on Iron Sulphide. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090200] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
75
|
Höti N, Chowdhury WH, Mustafa S, Ribas J, Castanares M, Johnson T, Liu M, Lupold SE, Rodriguez R. Armoring CRAds with p21/Waf-1 shRNAs: the next generation of oncolytic adenoviruses. Cancer Gene Ther 2010; 17:585-97. [PMID: 20448671 DOI: 10.1038/cgt.2010.15] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Conditionally replicating adenoviruses (CRAds) represent a promising modality for the treatment of neoplastic diseases, including Prostate Cancer. Selectively replicating viruses can be generated by placing a tissue or cancer-specific promoter upstream of one or more of the viral genes required for replication (for example, E1A, E1B). We have previously reported multiple cellular processes that can attenuate viral replication, which in turn compromises viral oncolysis and tumor kill. In this study, we investigated the importance of the cyclin-dependent kinase inhibitor p21/Waf-1, on viral replication and tumor growth. To our knowledge, this is the first report describing the importance of p21/Waf-1shRNA on the induction of an androgen responsive element (ARE) based promoter driving the E1A gene. As a proof of concept, the study emphasizes the use of RNA interference technology to overcome promoter weaknesses for tissue-specific oncolytic viruses, as well as the cellular inhibitor pathways on viral life cycle. Using RNA interference against p21/Waf-1, we were able to show an increase in viral replication and viral oncolysis of prostate cancer cells. Similarly, CRAd viruses that carry p21/Waf-1 shRNA (Ad5-RV004.21) were able to prevent tumor outgrowth that resulted in a marked increase in the mean survival time of tumor-bearing mice compared with CRAd without p21/Waf-1 shRNA (Ad5-RV004). In studies combining Ad5-RV004.21 with Adriamycin, a suprar-additive effect was observed only in CRAds that harbor shRNA against p21/Waf-1. Taken together, these findings of enhanced viral replication in prostate cancer cells by using RNA interference against the cdk inhibitor p21/Waf-1 have significant implications in the development of prostate-specific CRAd therapies.
Collapse
|