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2001

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Articles 61 - 90 of 190

Full-Text Articles in Medical Sciences

Assessment Of Immune System Involvement In Tourette Syndrome, Ashley Dawn Levine Mar 2001

Assessment Of Immune System Involvement In Tourette Syndrome, Ashley Dawn Levine

Loma Linda University Electronic Theses, Dissertations & Projects

Tourette syndrome (TS) is currently hypothesized to be the result of genetic and immunological components. This study investigated whether TS subjects produce IgG and IgA antibodies that bind to caudate nucleus, hippocampus, frontal cortex, cerebellum, thalamus, globus pallidus interior, exterior and putamen. Thirty- two children (14 TS, 7 family control, and 11 non-family control) and thirty-nine adults (11 TS, 14 family control, and 14 non-family control) were studied. Immunofluorescent studies were performed on basal ganglia tissue using serum from TS children and their family members. Brain antigens were prepared as two fractions (supernatant and pellet) and used as targets for …

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Arsenic Alters The Function Of The Glucocorticoid Receptor As A Transcription Factor, Ronald C. Kaltreider, Alisa M. Davis, Jean P. Lariviere, Joshua W. Hamilton Mar 2001

Arsenic Alters The Function Of The Glucocorticoid Receptor As A Transcription Factor, Ronald C. Kaltreider, Alisa M. Davis, Jean P. Lariviere, Joshua W. Hamilton

Dartmouth Scholarship

Chronic human exposure to nonovertly toxic doses of arsenic is associated with an increased risk of cancer. Although its carcinogenic mechanism is still unknown, arsenic does not directly cause DNA damage or mutations and is therefore thought to act principally as a co-mutagen, co-carcinogen, and/or tumor promoter. Previous studies in our laboratory demonstrated that effects of low-dose arsenic (III) (arsenite) on expression of the hormone-regulated phosphoenolpyruvate carboxykinase (PEPCK) gene were strongly associated with the glucocorticoid receptor (GR)-mediated regulatory pathway. We therefore examined specifically the effects of arsenite on the biochemical function of GR in hormone-responsive H4IIE rat hepatoma cells. Completely …

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Enhanced Expression Of Human Platelet-Derived Growth Factor In Pichia Pastoris, David M. Kaetzel Feb 2001

Enhanced Expression Of Human Platelet-Derived Growth Factor In Pichia Pastoris, David M. Kaetzel

Pharmacology and Nutritional Sciences Faculty Patents

Enhanced yields of the platelet-derived growth factor (PDGF) B-chain are obtained using the Pichia pastoris yeast system. Yields of both wild-type and mutant human proteins are enhanced when the yeast is transformed with a vector containing the yeast mating factor promoter fused to a sequence encoding the mature protein. The secreted wild-type protein is indistinguishable from mature 29-32 kDa protein isolated from human and Chinese hamster ovary (CHO) cells. An RKK→EEE mutant exhibited reduced association with the cell surface and accumulated in the culture medium as 29-32 kDa forms. Stable transfection of U87 astrocytoma cells with RKK→EEE mutants of either …

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Teratogen Update: Reproductive Risks Of Leflunomide (Arava); A Pyrimidine Synthesis Inhibitor: Counseling Women Taking Leflunomide Before Or During Pregnancy And Men Taking Leflunomide Who Are Contemplating Fathering A Child, Robert L. Brent Feb 2001

Teratogen Update: Reproductive Risks Of Leflunomide (Arava); A Pyrimidine Synthesis Inhibitor: Counseling Women Taking Leflunomide Before Or During Pregnancy And Men Taking Leflunomide Who Are Contemplating Fathering A Child, Robert L. Brent

The Selected Works of Robert Brent

Arava™ (leflunomide) is a pyrimidine synthesis inhibitor used in the treatment of active rheumatoid arthritis (RA). The chemical name for leflunomide is N- (4’-trifluoromethylphenyl)-5-methylisoxazole-4-carboxamide. Because the drug has been successful in the treatment of rheumatoid arthritis (RA), it is being widely prescribed. In spite of the clear warning that the drug should not be prescribed for pregnant women, approximately 30 women have become pregnant while taking leflunomide as of December 1999. This commentary was prepared to aid teratology counselors and genetic counselors that might be contacted by physicians or patients about the risk of leflunomide exposure during pregnancy. Before the …

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Characterization Of Sarr, A Modulator Of Sar Expression In Staphylococcus Aureus, Adhar Manna, Ambrose L. Cheung Feb 2001

Characterization Of Sarr, A Modulator Of Sar Expression In Staphylococcus Aureus, Adhar Manna, Ambrose L. Cheung

Dartmouth Scholarship

The expression of virulence determinants in Staphylococcus aureus is controlled by global regulatory loci (e.g., sar and agr). The sar locus is composed of three overlapping transcripts (sar P1, P3, and P2 transcripts from P1, P3, and P2 promoters, respectively), all encoding the 372-bp sarA gene. The level of SarA, the major regulatory protein, is partially controlled by the differential activation of sar promoters. We previously partially purified a ∼12 kDa protein with a DNA-specific column

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Truncated Forms Of The Dual Function Human Asct2 Neutral Amino Acid Transporter/Retroviral Receptor Are Translationally Initiated At Multiple Alternative Cug And Gug Codons, Chetankumar S. Tailor, Mariana Marin, Ali Nouri, Michael Kavanaugh, David Kabat Jan 2001

Truncated Forms Of The Dual Function Human Asct2 Neutral Amino Acid Transporter/Retroviral Receptor Are Translationally Initiated At Multiple Alternative Cug And Gug Codons, Chetankumar S. Tailor, Mariana Marin, Ali Nouri, Michael Kavanaugh, David Kabat

Biomedical and Pharmaceutical Sciences Faculty Publications

The sodium-dependent neutral amino acid transporter type 2 (ASCT2) was recently identified as a cell surface receptor for endogenously inherited retroviruses of cats, baboons, and humans as well as for horizontally transmitted type-D simian retroviruses. By functional cloning, we obtained 10 full-length 2.9-kilobase pair (kbp) cDNAs and two smaller identical 2.1-kbp cDNAs that conferred susceptibility to these viruses. Compared with the 2.9-kbp cDNA, the 2.1-kbp cDNA contains exonic deletions in its 3′ noncoding region and a 627-bp 5′ truncation that eliminates sequences encoding the amino-terminal portion of the full-length ASCT2 protein. Although expression of the truncated mRNA caused enhanced amino …

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Health Professions Division Catalog Academic Year 2001-2002, Nova Southeastern University Jan 2001

Health Professions Division Catalog Academic Year 2001-2002, Nova Southeastern University

Health Professions Divisions Course Catalogs and Course Descriptions

No abstract provided.

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The Process Of Clinical Trials: A Model For Successful Clinical Trial Participation, Cecile A. Lengacher, Lois L. Gonzalez, Rosemary Giuliano, Mary P. Bennett, Charles E. Cox, Douglas S. Reintgen Jan 2001

The Process Of Clinical Trials: A Model For Successful Clinical Trial Participation, Cecile A. Lengacher, Lois L. Gonzalez, Rosemary Giuliano, Mary P. Bennett, Charles E. Cox, Douglas S. Reintgen

Nursing Faculty Publications

No abstract provided.

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Eye Position Sense Contributes To The Judgement Of Slant., F M James, S Whitehead, G K Humphrey, M S Banks, T Vilis Jan 2001

Eye Position Sense Contributes To The Judgement Of Slant., F M James, S Whitehead, G K Humphrey, M S Banks, T Vilis

Brain and Mind Institute Researchers' Publications

We measured monocular judgements of the slant of a cube face while varying eye position in the absence of stereoscopic and external lighting cues. Errors were found to be small, only 10% on average of the cube's eccentricity. Two factors appear to have contributed approximately equally to this error: an underestimate of cube slant as seen by the eye and an underestimate of eye position. When prism adaptation altered the sensed eye position, the pattern of slant judgements changed to reflect the altered sense of eye position.

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Cationic Surfactant Mediated Hybridization And Hydrophobization Of Dna Molecules At The Liquid/Liquid Interface And Their Phase Transfer, Murali Sastry, Ashavani Kumar, Mrunalini Pattarkine, Vidya Ramakrishnan, Krishna N. Ganesh Jan 2001

Cationic Surfactant Mediated Hybridization And Hydrophobization Of Dna Molecules At The Liquid/Liquid Interface And Their Phase Transfer, Murali Sastry, Ashavani Kumar, Mrunalini Pattarkine, Vidya Ramakrishnan, Krishna N. Ganesh

Faculty Works

Hybridization of complementary oligonucleotides mediated by a cationic surfactant at the water/hexane interface leads to hydrophobic, double-helical DNA which may be readily phase transferred to the organic phase and cast into thin films on solid substrates.

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Guanylyl Cyclase C (Gc-C) Inhibits Human Colon Carcinoma Cell Growth, Giovanni Mario Pitari Jan 2001

Guanylyl Cyclase C (Gc-C) Inhibits Human Colon Carcinoma Cell Growth, Giovanni Mario Pitari

Department of Pharmacology and Experimental Therapeutics Faculty Papers

This is the presentation given for the 2001 Presidential Trainee Young Investigator Award, American Society for Clinical Pharmacology and Therapeutics. An abstract of the presentation has been published in Clin. Pharmacol. Ther., 69(2):P62, 2001. The presentation illustrates the role of the intestinal GC-C receptor as a negative regulator of cell proliferation and cell cycle kinetics in colorectal cancer. It suggests that paracrine GC-C hormones guanylin/uroguanylin are physiological inducers of the proliferation-to-differentiation transition along the intestinal crypt-villus axis. Importantly, the bacterial enterotoxin ST, a potent exogenous GC-C agonist, is offered as a potential cytostatic agent for the prevention and treatment of …

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The Surveillance Of T-Lymphocytes In The Human Blood Stream, Ivan Temesvari Jan 2001

The Surveillance Of T-Lymphocytes In The Human Blood Stream, Ivan Temesvari

Masters Theses

T-Lymphocytes (T-cells), one of the many different lymphocytes, are the precursors of disease detection. Their primary purpose is to maintain a healthy immune system. They use the blood vasculature (blood stream) and lymphatic system to circulate throughout the body. Study of a T-cells journey throughout the human blood stream is useful to understand how they can detect disease, such as cancer, in an efficient and effective manner. T-cells are to be thought of as the good cells in our body searching to destroy the bad cells (cancer/infectious cells). The thymus lies in the anterior mediastinum, which is directly behind the …

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Molecular Genetics Of Breast Cancer, Emel Ergül, Ali̇ Sazci Jan 2001

Molecular Genetics Of Breast Cancer, Emel Ergül, Ali̇ Sazci

Turkish Journal of Medical Sciences

Recent advances in molecular biology enable researchers to understand the basis of breast cancer much better and show that hereditery breast cancer may result from mutations on several specific gene loci including BRCA1, BRCA2, p53, ATM and PTEN. These genes are tumor supressor genes and although their functions are different, they are all involved in the maintenance of genomic stability after DNA damage. Mutations that impair the function of these genes may adversely affect the manner in which DNA damage is processed. It is likely that the risk of breast cancer development is increased through this mechanism. Moreover, there are …

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Sandwich-Type Enzyme Immunoassay For Amyloid A4 Protein In Cerebrospinal Fluid From Patients With Head Trauma, İbrahi̇m Pi̇ri̇m Jan 2001

Sandwich-Type Enzyme Immunoassay For Amyloid A4 Protein In Cerebrospinal Fluid From Patients With Head Trauma, İbrahi̇m Pi̇ri̇m

Turkish Journal of Medical Sciences

The aim of this study was to design a simple method for detecting the amyloid A4 protein in the cerebrospinal fluid (CSF) of patients who had severe brain trauma caused by traffic or other accidents and to evaluate its diagnostic and prognostic value. For this purpose, a sandwich type ELISA assay was used. A4, a 4kDa protein of 39-43 amino acids, is a metabolic product of a membrane-spanning, 695-770 aa, precursor molecule, the b-amyloid precursor protein (b-APP). The polyclonal rabbit antibody against synthetic A4 protein (1-40 residues) was used as an immobilized antibody. A mouse monoclonal antibody against synthetic A4 …

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Efficacy Of Some Disinfectants On Embryonated Eggs Of Toxocara Canis, Hasan Ayçi̇çek, Ender Yarsan, H. Oğuz Sarimehmetoğlu, Mehmet Tanyüksel, Nogay Gi̇rgi̇nkardeşler, Mustafa Özyurt Jan 2001

Efficacy Of Some Disinfectants On Embryonated Eggs Of Toxocara Canis, Hasan Ayçi̇çek, Ender Yarsan, H. Oğuz Sarimehmetoğlu, Mehmet Tanyüksel, Nogay Gi̇rgi̇nkardeşler, Mustafa Özyurt

Turkish Journal of Medical Sciences

The aim of this study was to evaluate the efficacy of various disinfectants in different concentrations against embryonated Toxocara canis eggs. For this purpose, 2.5%, 5%, 7.5%, and 10% iodine, 2% glutaraldehyde, 10% benzalkonium chloride, 7% sodium hypochloride, 1% potassium permanganate, 70% ethyl alcohol, 10% potassium hydroxide and 3% phenol solutions were used as the disinfectants. This study was performed both in vitro and in-vivo. In the in vitro experiment, T. canis eggs were treated with disinfectant solutions in different time intervals, and larval motility was observed under X400 magnification with an inverted microscope. Microscopic examinations revealed that T. canis …

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Relationship Between Aging And Susceptibility To Oxidative Damage: An Assessment By Erythrocyte Membrane Proteins And Lipids, Ahmet Özaydin, İlhan Onaran, Kadi̇r Avşar, Vecdet Tezcan, Gönül Sultuybek Jan 2001

Relationship Between Aging And Susceptibility To Oxidative Damage: An Assessment By Erythrocyte Membrane Proteins And Lipids, Ahmet Özaydin, İlhan Onaran, Kadi̇r Avşar, Vecdet Tezcan, Gönül Sultuybek

Turkish Journal of Medical Sciences

Contradictory results have been reported from various studies regarding the effect of age on susceptibility to oxidative damage. Using different parameters, we carried out a comparative study on the erythrocytes and erythrocyte membranes of healthy elderly and young adults to determine how resistance to oxidative damage is affected by aging. Thin layer chromatography and polyacrylamide gel electrophoresis under denaturing conditions were used to estimate changes in membrane phospholipids and cytoskeletal proteins, respectively. Our results showed that these components of intact erythrocytes incubated with cumene hydroperoxide (CumOOH), a powerful oxidising agent, remained unchanged in both age groups. However, exposure of erythrocyte …

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Department Of Radiation Oncology And Kimmel Cancer Center, Thomas Jefferson University, The Intronic G13964c Variant In P53 Is Not A High-Risk Mutation In Familial Breast Cancer In Australia., Anna Marsh, Amanda B Spurdle, Bruce C Turner, Sian Fereday, Heather Thorne, Gulietta M Pupo, Graham J Mann, John L Hopper, Joseph F Sambrook, Georgia Chenevix-Trench Jan 2001

Department Of Radiation Oncology And Kimmel Cancer Center, Thomas Jefferson University, The Intronic G13964c Variant In P53 Is Not A High-Risk Mutation In Familial Breast Cancer In Australia., Anna Marsh, Amanda B Spurdle, Bruce C Turner, Sian Fereday, Heather Thorne, Gulietta M Pupo, Graham J Mann, John L Hopper, Joseph F Sambrook, Georgia Chenevix-Trench

Department of Radiation Oncology Faculty Papers

BACKGROUND: Mutations in BRCA1 and BRCA2 account for approximately 50% of breast cancer families with more than four affected cases, whereas exonic mutations in p53, PTEN, CHK2 and ATM may account for a very small proportion. It was recently reported that an intronic variant of p53--G13964C--occurred in three out of 42 (7.1%) 'hereditary' breast cancer patients, but not in any of 171 'sporadic' breast cancer control individuals (P = 0.0003). If this relatively frequent occurrence of G13964C in familial breast cancer and absence in control individuals were confirmed, then this would suggest that the G13964C variant plays a role in …

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Are Inflammatory Cytokines Potential Mediators Of Phenytoin-Induced Gingival Overgrowth?, Nurcan Buduneli̇, Gül Ati̇lla, Neci̇l Kütükçüler Jan 2001

Are Inflammatory Cytokines Potential Mediators Of Phenytoin-Induced Gingival Overgrowth?, Nurcan Buduneli̇, Gül Ati̇lla, Neci̇l Kütükçüler

Turkish Journal of Medical Sciences

The levels of interleukin-1beta, tumour necrosis factor-alpha, and interleukin 6 in gingival crevicular fluid of phenytoin-treated patients (from sites exhibiting overgrowth and sites not exhibiting overgrowth) and control subjects were investigated. Six epileptic patients exhibiting severe phenytoin-induced gingival overgrowth, 12 patients with chronic gingivitis and 11 subjects with clinically healthy periodontium were included in the study. The cytokine levels were analysed by enzyme-linked immunosorbent assay and expressed as ng/2 sites. Wilcoxon signed-rank test, Kruskall-Wallis, Mann-Whitney U test and Spearman rank correlation were used for statistical analysis of the data. Overgrown sites showed significantly higher levels of interleukin-1beta compared to the …

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The Effect Of Moderate +Gz Force On The Cervical Spine Bone Mineral Density In Raaf Pc-9 Pilots, Meghan C. Grant Jan 2001

The Effect Of Moderate +Gz Force On The Cervical Spine Bone Mineral Density In Raaf Pc-9 Pilots, Meghan C. Grant

Theses : Honours

Previous research on exercise and bone mineral density (BMD) has established that increases in BMD are site specific, responding to unusual strain and particularly to high magnitude loading. The positive Gz forces generated during high performance flying provide all three variables. Naumann, Bennell and Wark (2000) investigated the effects of moderate gravitational force on the BMD of fighter pilots. The pilots in this study had significant increases in BMD and bone mineral content (BMC) for the thoracic spine, pelvis and total body. However, it is now suspected that the cervical spine, which was unable to be analysed at that time …

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Production Of Monoclonal Antibody Specific For Human Hemoglobin, Selma Öztürk, Beyazit Çirakoğlu Jan 2001

Production Of Monoclonal Antibody Specific For Human Hemoglobin, Selma Öztürk, Beyazit Çirakoğlu

Turkish Journal of Medical Sciences

Hemoglobin is not normally present in sputum, urine or feces except in minute amounts. Demonstration of the presence of hemoglobin in these materials is an important diagnostic clue that usually implies bleeding within the respiratory, urinary or gastroentestinal tract, respectively. In this work, a hybridoma line secreting monoclonal antibody (Mab) highly specific for human hemoglobin A (hHbA) was generated by fusion of immunized BALB/c mouse splenic lymphocytes with non-secreting mouse myeloma cells followed by selection in hypoxanthine-aminopterin-thymidine (HAT) medium and the screening of culture fluids for hHb A affinity in ELISA. The Mab produced by MAM 2/3B6 is highly specific …

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Flow Cytometric Analysis Of The Effects Of Methotrexate And Vepesid On The Hep-2 Cell Cycle, Ni̇zami̇ Duran, Adi̇l M. Allahverdi̇yev, Sali̇h Çeti̇ner Jan 2001

Flow Cytometric Analysis Of The Effects Of Methotrexate And Vepesid On The Hep-2 Cell Cycle, Ni̇zami̇ Duran, Adi̇l M. Allahverdi̇yev, Sali̇h Çeti̇ner

Turkish Journal of Medical Sciences

Objective: To determine the mechanism of action of Methotrexate and Vepesid on the HEp-2 cells isolated from human laryngeal cancer cells morphologically and flow cytometrically (G1, G2, S and PI). Materials and Methods: The HEp-2 continuous cell line was used. Cultivation of the cells was realized in EMEM medium with 10% fetal bovine serum at an atmosphere of 37ºC with 5% CO_2. Six different concentrations of Vepesid and Methotrexate were prepared by diluting with deionized water (5 µg/ml, 50 mg/ml, 500 µg/ml). The morphological and cell cycle parameters of HEp-2 cells were determined by inverted microscope and flow cytometer respectively. …

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The Effects Of Benzo(A) Pyrene Doxorubicin And Paclitaxel On P170 Glycoprotein, Di̇dem Turgut Coşan, Ayşe Başaran Jan 2001

The Effects Of Benzo(A) Pyrene Doxorubicin And Paclitaxel On P170 Glycoprotein, Di̇dem Turgut Coşan, Ayşe Başaran

Turkish Journal of Medical Sciences

B(a)P is a mutagenic, carcinogenic and teratogenic substance. Paclitaxel and doxorubicin are antineoplastic drugs widely used in cancer treatment. The purpose of this study is to observe the effects of doxorubicin and paclitaxel on p170 glycoprotein in rat liver and kidney tissue after administration of B(a)P. As is well known, p170 glycoprotein is an indicator of drug resistance. We hypothesized that a combination of these antineoplastic drugs would cause lower p170 levels and thus would have a stronger effect than single drug administration. For confirmation, a combination of drugs was used to prevent the development of drug resistance. In this …

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Protective Effects Of Vitamin E Selenium And Allopurinol Against Stress-Induced Ulcer Formation In Rats, Nai̇me Canoruç, Ramazan Çi̇çek, Aytaç Atamer, Mehmet Dursun, Cengi̇z Turgut, Ensari̇ Güneli̇, Fi̇kri̇ Canoruç Jan 2001

Protective Effects Of Vitamin E Selenium And Allopurinol Against Stress-Induced Ulcer Formation In Rats, Nai̇me Canoruç, Ramazan Çi̇çek, Aytaç Atamer, Mehmet Dursun, Cengi̇z Turgut, Ensari̇ Güneli̇, Fi̇kri̇ Canoruç

Turkish Journal of Medical Sciences

This study was carried out in the Health Research Center (DÜSAM) laboratory of Dicle University. Vitamin E, Selenium and Allopurinol were given to counteract gastric damage caused by stress in rats. In the study 64 male Sprague dawley rats were used. They were divided into 8 groups, and protective agents were applied at different doses for 8 weeks. Then, performing cold-restraint stress stomach tissues were taken out and investigated macroscopically to determine mucosal damage. Lipid peroxidation levels in the stomach specimens were determined by identifying Malondialdehyde (MDA) levels by the thiobarbituric acid method. These agents have shown protective effects against …

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In Vitro Mic Determination Of Haemophilus Influenzae Strains Using E-Test, Ni̇lay Çöplü, Orhan Cem Aktepe, Selda Uluutku, Engi̇n Güvener Jan 2001

In Vitro Mic Determination Of Haemophilus Influenzae Strains Using E-Test, Ni̇lay Çöplü, Orhan Cem Aktepe, Selda Uluutku, Engi̇n Güvener

Turkish Journal of Medical Sciences

H. influenzae is a fastidious bacteria, so the selection of a reliable method for in-vitro susceptibility tests is particularly important. The E-test is a practical method for detecting in-vitro antimicrobial susceptibility of antibiotics by MIC values. This study was performed using the E-test for direct patient management and in order to obtain epidemiological data on H. influenzae. The detection of antimicrobial agent resistance among fifty-seven H. influenzae isolates from lower respiratory tract infections in childhood was studied by the E-test. The E-test was performed on HTM agar according to the instruction manual recommendations. The susceptibility ratios and the MIC90 values …

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Effects Of Experimental Diabetes And Insulin Treatment On Rabbit Renal Morphology: A Quantitative And Qualitative Study, Hüseyi̇n Eray Bulut, Bi̇lge Onarlioğlu, Celal Kaloğlu, Öztürk Özdemi̇r, Semi̇h Ayan Jan 2001

Effects Of Experimental Diabetes And Insulin Treatment On Rabbit Renal Morphology: A Quantitative And Qualitative Study, Hüseyi̇n Eray Bulut, Bi̇lge Onarlioğlu, Celal Kaloğlu, Öztürk Özdemi̇r, Semi̇h Ayan

Turkish Journal of Medical Sciences

Diabetes causes metabolic defects and related vascular alterations such as atherosclerosis. These vascular alterations may also reflect the renal structural degeneration under the influence of diabetes. Therefore, the aim of the present study was to determine qualitatively and quantitatively the effect of experimental diabetes on rabbit renal cortical structure, and also to evaluate the reversal rate of the renal structural alterations by daily insulin treatment. Eighteen rabbits, bred and fed in standard laboratory conditions, were divided into 3 groups each containing 6 animals. While control group animals received no treatment, the rest were injected with a single dose of intravenous …

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Analysis Of Ras Gene Mutation In Human Oral Tumours By Polymerase Chain Reaction And Direct Sequencing, Si̇nan Süzen, James M. Parry Jan 2001

Analysis Of Ras Gene Mutation In Human Oral Tumours By Polymerase Chain Reaction And Direct Sequencing, Si̇nan Süzen, James M. Parry

Turkish Journal of Medical Sciences

Genetic alterations in proto-oncogenes or tumour suppressor genes are believed to be one of the key events in the multistage process of carcinogenesis. Activating point mutations occurring in either one of the three ras proto-oncogene families are common genetic alterations in human and animal neoplasms. However, the mechanisms leading to oral cancer are not completely understood. Activation of the ras oncogene in oral carcinogenesis, although absent or rare in the western world, accounts for up to 35% of all malignancies in India and South Asia. Recognised aetiological agents of oral cancer include tobacco and alcohol. Tobacco-associated compounds such as nitrosamines …

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Cytomorphologic Analysis Of Papanicolaou Stained Smears Collected From Floor Of The Mouth Mucosa In Patients With Or Without Oral Malignancy, Nur Mollaoğlu, Jonathan George Cowpe, Rita Walker Jan 2001

Cytomorphologic Analysis Of Papanicolaou Stained Smears Collected From Floor Of The Mouth Mucosa In Patients With Or Without Oral Malignancy, Nur Mollaoğlu, Jonathan George Cowpe, Rita Walker

Turkish Journal of Medical Sciences

Cytology has been found to be a reliable and accurate technique when used to diagnose early malignant transformation in areas of the body where visual examination is difficult or impossible. The factors initiating neoplastic growth are still not clearly understood. Thus, automated instruments, capable of objective and quantitative cell analysis, have been used in descriptive morphology, for the assessment of tumour cell heterogeneity. Smears were collected from a group of 33 patients presenting with squamous cell carcinoma. Nine females and 24 males presenting with squamous cell carcinoma of the floor of the mouth underwent quantitative cytological assessment. These slides were …

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Igg Subclass Levels In Elf In Copd, Demet Karnak, Sumru Beder, Oya Kayacan, Levent Karaca Jan 2001

Igg Subclass Levels In Elf In Copd, Demet Karnak, Sumru Beder, Oya Kayacan, Levent Karaca

Turkish Journal of Medical Sciences

Objective: Deficiency of immunoglobulin (Ig) may be responsible for recurrent infections in chronic obstructive pulmonary disease (COPD). Our aim was to investigate the level of IgG subclass (IgGsc) in the epithelial lining fluid (ELF) and to try to find a possible relation between these levels and serum or bronchoalveolar lavage (BAL) IgGsc levels in COPD patients with recurrent acute exacerbation. Methods: Twenty-four clinically stable non-smoking COPD patients who had developed recurrent exacerbations three or four times a year and 17 individuals without COPD were enrolled as the experimental and control groups (Group I and II) respectively. The BAL procedure was …

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Glomerular Hla Dr Dp Dq Expression In Renal Diseases, Sülen Sarioğlu, Feza Kirimca, Caner Çavdar, Mehmet Türkmen Jan 2001

Glomerular Hla Dr Dp Dq Expression In Renal Diseases, Sülen Sarioğlu, Feza Kirimca, Caner Çavdar, Mehmet Türkmen

Turkish Journal of Medical Sciences

The expression of major histocompatibility antigens class II (MHC II) in renal diseases has been studied extensively in the tubulo-interstitial compartment, while there are few articles about their expression in the glomeruli. In this series, glomerular expression of HLA DR DP DQ is evaluated in a total of 62 cases of pyelonephritis, glomerulonephritis, tubulointerstitial nephritis and systemic diseases with renal manifestations in order to identify their relationship with disease status and renal scarring. Formaline fixed paraffin embedded tissue sections from renal biopsy and nefrectomy specimens were stained by an antibody against HLA DR DP DQ by the streptavidin biotin method. …

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Determination Of The Absorption Of Zn By Preterm Infants, Using 70zn Enriched Tracer, Ulvi̇ Ulusoy, John E. Whitley Jan 2001

Determination Of The Absorption Of Zn By Preterm Infants, Using 70zn Enriched Tracer, Ulvi̇ Ulusoy, John E. Whitley

Turkish Journal of Medical Sciences

Absorption of zinc by preterm infants from a synthetic milk labelled extrinsically with 70Zn tracer was determined by faecal monitoring. Six male preterm babies with a mean gestational age of 31±2.9 weeks and a mean birth weight of 1.23±0.24 kg were studied for three balance periods of 72 h with intervals ranging from 6 to 30 days. The babies were fed with the milk containing zinc with added 70Zn tracer. The net (NA) and true (TA) absorption, and endogenous loss (EL) of zinc were determined by the classical (chemical) balance and isotopic approaches. The mean TA, NA and EL were …

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