201
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Becker DP, DeCrescenzo G, Freskos J, Getman DP, Hockerman SL, Li M, Mehta P, Munie GE, Swearingen C. alpha-Alkyl-alpha-amino-beta-sulphone hydroxamates as potent MMP inhibitors that spare MMP-1. Bioorg Med Chem Lett 2001; 11:2723-5. [PMID: 11591510 DOI: 10.1016/s0960-894x(01)00557-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of alpha-alkyl-alpha-amino-beta-sulphone hydroxamates was prepared and evaluated for potency versus MMP-2 and MMP-13, and for selectivity versus MMP-1. Low nanomolar potency was obtained with selectivity versus MMP-1 ranging from >10 to >1000. Selected compounds were orally bioavailable.
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202
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Barta TE, Becker DP, Bedell LJ, De Crescenzo GA, McDonald JJ, Mehta P, Munie GE, Villamil CI. Selective, orally active MMP inhibitors with an aryl backbone. Bioorg Med Chem Lett 2001; 11:2481-3. [PMID: 11549451 DOI: 10.1016/s0960-894x(01)00487-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This letter describes SAR exploration and rat PK optimization of a series of novel, MMP-1 sparing aryl hydroxamate sulfonamides with activity against MMP-2 and MMP-13.
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203
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Shah S, Mehta P, Stallard NJ. Bronchoscopy with bronchoalveolar lavage via the laryngeal mask airway in high-risk hypoxemic immunosuppressed patients. Crit Care Med 2001; 29:1848-9. [PMID: 11547008 DOI: 10.1097/00003246-200109000-00039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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204
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He XY, Merz G, Yang YZ, Mehta P, Schulz H, Yang SY. Characterization and localization of human type10 17beta-hydroxysteroid dehydrogenase. EUROPEAN JOURNAL OF BIOCHEMISTRY 2001; 268:4899-907. [PMID: 11559359 DOI: 10.1046/j.0014-2956.2001.02421.2421.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The tissue distribution, subcellular localization, and metabolic functions of human 17beta-hydroxysteroid dehydrogenase type 10/short chain L-3-hydroxyacyl-CoA dehydrogenase have been investigated. Human liver and gonads are abundant in this enzyme, but it is present in only negligible amounts in skeletal muscle. Its N-terminal sequence is a mitochondrial targeting sequence, but is not required for directing this protein to mitochondria. Immunocytochemical studies demonstrate that this protein, which has been referred to as ER-associated amyloid beta-binding protein (ERAB), is not detectable in the ER of normal tissues. We have established that protocols employed to investigate the subcellular distribution of ERAB yield ER fractions rich in mitochondria. Mitochondria-associated membrane fractions believed to be ER fractions were employed in ERAB/Abeta-binding alcohol dehydrogenase studies. The present studies establish that in normal tissues this protein is located in mitochondria. This feature distinguishes it from all known 17beta-hydroxysteroid dehydrogenases, and endows mitochondria with the capability of modulating intracellular levels of the active forms of sex steroids.
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205
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Colder CR, Mehta P, Balanda K, Campbell RT, Mayhew KP, Stanton WR, Pentz MA, Flay BR. Identifying trajectories of adolescent smoking: an application of latent growth mixture modeling. Health Psychol 2001. [PMID: 11315730 DOI: 10.1037//0278-6133.20.2.127] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The goal of the current study was to identify discrete longitudinal patterns of change in adolescent smoking using latent growth mixture modeling. Five distinct longitudinal patterns were identified. A group of early rapid escalators was characterized by early escalation (at age 13) that rapidly increased to heavy smoking. A pattern characterized by occasional puffing up until age 15, at which time smoking escalated to moderate levels was also identified (late moderate escalators). Another group included adolescents who, after age 15, began to escalate slowly in their smoking to light (0.5 cigarettes per month) levels (late slow escalators). Finally, a group of stable light smokers (those who smoked 1-2 cigarettes per month) and a group of stable puffers (those who smoked only a few puffs per month) were also identified. The stable puffer group was the largest group and represented 25% of smokers.
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206
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Sharda S, Carter J, Wingard JR, Mehta P. Monitoring vital signs in a bone marrow transplant unit: are they needed in the middle of the night? Bone Marrow Transplant 2001; 27:1197-200. [PMID: 11551031 DOI: 10.1038/sj.bmt.1703052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Monitoring vital signs (VS) is a routine procedure in bone marrow transplant (BMT) units, but such monitoring can interfere with sleep. We hypothesized that middle of the night (MON) monitoring may not be needed in all patients. Charts of 20 consecutive patients who underwent BMT were reviewed for MON monitoring to determine the frequency with which monitoring resulted in a nursing intervention, call to the physician or change in treatment by the physician. Charts were also reviewed for day time events, which could predict the need for monitoring at night. MON monitoring was done on 457 of the 543 nights evaluated, 148 nursing interventions were performed during these 457 nights (32%) of which only 20 (4%) were the result of monitoring VS. In five instances, the nurse called the physician as a result of monitoring VS and in three of these five instances, the treatment was changed. The only day time event that was significantly associated was fever (P = 0.0002). There was also a trend for CNS events (P = 0.057) to be associated with MON intervention. Larger, prospective studies need to be done to accurately identify day time risk factors that can predict the need for night time monitoring.
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207
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Chen H, Mohuczy D, Li D, Kimura B, Phillips MI, Mehta P, Mehta JL. Protection against ischemia/reperfusion injury and myocardial dysfunction by antisense-oligodeoxynucleotide directed at angiotensin-converting enzyme mRNA. Gene Ther 2001; 8:804-10. [PMID: 11420645 DOI: 10.1038/sj.gt.3301439] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2000] [Accepted: 01/09/2001] [Indexed: 11/09/2022]
Abstract
Angiotensin-converting enzyme (ACE) activity in the myocardium and angiotensin-II (Ang-II) levels in plasma increase after myocardial ischemia, which lead to exacerbation of myocardial injury and cardiac dysfunction. We examined the protective role of novel antisense-oligodeoxynucleotide (AS-ODN) directed at ACE mRNA in myocardial ischemic injury. Sprague-Dawley rats were treated with ACE-AS-ODN (200 microg per rat, n = 8, i.v.) or inverted-ODN (IN-ODN, 200 microg per rat, n = 8, i.v.), given with 600 microg per rat of liposome DOTAP/DOPE. Hearts from AS-ODN- or IN-ODN-treated rats were excised, perfused in vitro, and subjected to 25 min of global ischemia followed by 30 min of reperfusion. Parallel groups of rats were given ACE inhibitor captopril (5 mg/kg, n = 8) or saline (n = 8) before excising the hearts. Ischemia/reperfusion resulted in myocardial dysfunction (increase in coronary perfusion pressure and LV end-diastolic pressure and a decrease in developed LV pressure) in the saline-treated rats. Myocardial dysfunction was associated with evidence of lipid peroxidation and enzyme leakage (MDA and LDH levels in the myocardium) and up-regulation of ACE protein expression. Administration of AS-ODN or captopril, but not IN-ODN, reduced Ang-II levels in the plasma, decreased ischemia/reperfusion-mediated cardiac functional deterioration and lipid peroxidation, and preserved LDH in the myocardium (all P < 0.05 versus the saline group). AS-ODN and captopril had equipotent effects on cardiac dynamics. ACE protein expression (western blot) was decreased in the hearts of the AS-ODN-treated group, but not in IN-ODN-treated rat hearts. In contrast, ACE protein expression was significantly increased in captopril-treated rat hearts. These observations suggest that AS-ODN directed at ACE mRNA can ameliorate myocardial dysfunction and injury after ischemia/reperfusion, and its use is associated with decreased expression of ACE protein in the ischemic myocardium.
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208
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Wall SM, Fischer MP, Mehta P, Hassell KA, Park SJ. Contribution of the Na+-K+-2Cl- cotransporter NKCC1 to Cl- secretion in rat OMCD. Am J Physiol Renal Physiol 2001; 280:F913-21. [PMID: 11292635 DOI: 10.1152/ajprenal.2001.280.5.f913] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In rat kidney the "secretory" isoform of the Na+-K+-2Cl- cotransporter (NKCC1) localizes to the basolateral membrane of the alpha-intercalated cell. The purpose of this study was to determine whether rat outer medullary collecting duct (OMCD) secretes Cl- and whether transepithelial Cl- transport occurs, in part, through Cl- uptake across the basolateral membrane mediated by NKCC1 in series with Cl- efflux across the apical membrane. OMCD tubules from rats treated with deoxycorticosterone pivalate were perfused in vitro in symmetrical HCO/CO2-buffered solutions. Cl- secretion was observed in this segment, accompanied by a lumen positive transepithelial potential. Bumetanide (100 microM), when added to the bath, reduced Cl- secretion by 78%, although the lumen positive transepithelial potential and fluid flux were unchanged. Bumetanide-sensitive Cl- secretion was dependent on extracellular Na+ and either K+ or NH, consistent with the ion dependency of NKCC1-mediated Cl- transport. In conclusion, OMCD tubules from deoxycorticosterone pivalate-treated rats secrete Cl- into the luminal fluid through NKCC1-mediated Cl- uptake across the basolateral membrane in series with Cl- efflux across the apical membrane. The physiological role of NKCC1-mediated Cl- uptake remains to be determined. However, the role of NKCC1 in the process of fluid secretion could not be demonstrated.
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209
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Colder CR, Mehta P, Balanda K, Campbell RT, Mayhew KP, Stanton WR, Pentz MA, Flay BR. Identifying trajectories of adolescent smoking: an application of latent growth mixture modeling. Health Psychol 2001; 20:127-35. [PMID: 11315730 DOI: 10.1037/0278-6133.20.2.127] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The goal of the current study was to identify discrete longitudinal patterns of change in adolescent smoking using latent growth mixture modeling. Five distinct longitudinal patterns were identified. A group of early rapid escalators was characterized by early escalation (at age 13) that rapidly increased to heavy smoking. A pattern characterized by occasional puffing up until age 15, at which time smoking escalated to moderate levels was also identified (late moderate escalators). Another group included adolescents who, after age 15, began to escalate slowly in their smoking to light (0.5 cigarettes per month) levels (late slow escalators). Finally, a group of stable light smokers (those who smoked 1-2 cigarettes per month) and a group of stable puffers (those who smoked only a few puffs per month) were also identified. The stable puffer group was the largest group and represented 25% of smokers.
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210
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Skoda-Smith S, Douglas VK, Mehta P, Graham-Pole J, Wingard JR. Treatment of post-transplant lymphoproliferative disease with induction chemotherapy followed by haploidentical peripheral blood stem cell transplantation and Rituximab. Bone Marrow Transplant 2001; 27:329-32. [PMID: 11277182 DOI: 10.1038/sj.bmt.1702792] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Management of monoclonal lymphoproliferative disease following stem cell transplantation is difficult and previous attempts to eradicate tumor using chemotherapy or radiation therapy alone have not been successful. We report successful early eradication of an EBV negative, B cell non-Hodgkin's lymphoma in a child who received a T cell-depleted, maternal haploidentical bone marrow transplant for severe combined immunodeficiency disease. Our treatment strategy involved combining conventional induction chemotherapy with re-transplantation using the paternal donor as a source of peripheral blood stem cells, followed by treatment with anti-CD 20 monoclonal antibody (Rituximab). This strategy exploits the potential graft-versus-tumor activity of the mature T cells in the graft, while providing a source of stem cells to confer long-term immune function. The administration of Rituximab in the early post-transplant course may provide additional anti-tumor activity without affecting the new stem cell compartment.
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211
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He XY, Merz G, Chu CH, Lin D, Yang YZ, Mehta P, Schulz H, Yang SY. Molecular cloning, modeling, and localization of rat type 10 17beta-hydroxysteroid dehydrogenase. Mol Cell Endocrinol 2001; 171:89-98. [PMID: 11165016 DOI: 10.1016/s0303-7207(00)00391-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Rat and mouse complementary DNAs of type 10 17beta-hydroxysteroid dehydrogenase were cloned and sequenced. The mouse cDNA clone's sequence corrected the previously published nucleotide and amino acid sequence of mouse endoplasmic reticulum-associated beta-amyloid-binding protein. A subunit of the rat enzyme consists of 261 amino acid residues with a calculated molecular mass of 27250 Da. Compared with its human counterpart, rat 17betaHSD type 10 shows 88% identity. Mouse 17betaHSD type 10 is composed of 261 amino acid residues with a calculated molecular mass of 27274 Da. There is 95% identity between the two rodent enzymes. A stereostructure model of rat 17betaHSD type 10 was constructed based on its amino acid sequence. Similar to human type 10 17betaHSD, the rodent enzymes also displayed relatively higher 3alphaHSD activity than 17betaHSD activity. Intracellular localization of rat 17betaHSD type 10 has been determined by subcellular fractionation and confocal microscopy studies. The results unequivocally establish that this is a nuclear gene-encoded mitochondrial enzyme, and that this 17betaHSD is not associated with the endoplasmic reticulum. The unique location distinguishes type 10 from other types of 17beta-hydroxysteroid dehydrogenases.
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212
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Shah S, Mehta P, Salmon J, Stallard N. Fiberoptic bronchoscopy and bronchoalveolar lavage in patients with a haematological malignancy with bilateral pulmonary infiltrates. Crit Care 2001. [PMCID: PMC3333228 DOI: 10.1186/cc1108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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213
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Habermann H, Chang WY, Birch L, Mehta P, Prins GS. Developmental exposure to estrogens alters epithelial cell adhesion and gap junction proteins in the adult rat prostate. Endocrinology 2001; 142:359-69. [PMID: 11145599 DOI: 10.1210/endo.142.1.7893] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Brief exposure to estrogens during the neonatal period interrupts rat prostatic development by reducing branching morphogenesis and by blocking epithelial cells from entering a normal differentiation pathway. Upon aging, ventral prostates exhibit extensive hyperplasia and dysplasia suggesting that neonatal estrogens may predispose the prostate gland to preneoplastic lesions. To determine whether these prostatic lesions may be manifested through aberrant cell-to-cell communications, the present study examined specific gap junction proteins, Connexins (Cx) 32, and Cx 43, and the cell adhesion molecule, E-cadherin, in the developing, adult and aged rat prostate gland. Male rat pups were given 25 microgram estradiol benzoate or oil on days 1, 3, and 5 of life. Prostates were removed on days 1, 4, 5, 6, 10, 15, 30, or 90 or at 16 months, and frozen sections were immunostained for E-cadherin, Cx 43, and Cx 32. Colocalization studies were performed with immunofluorescence using specific antibodies for cell markers. Gap junctions in undifferentiated epithelial cells at days 1-10 of life were composed of Cx 43, which always colocalized with basal cell cytokeratins (CK 5/15). Cx 32 expression was first observed between days 10-15 and colocalized to differentiated luminal cells (CK 8/18). Cx 43 and Cx 32 never colocalized to the same cell indicating that gap junction intercellular communication differs between basal and luminal prostatic cells. While epithelial connexin expression was not initially altered in the developing prostates following estrogen exposure, adult prostates of neonatally estrogenized rats exhibited a marked decrease in Cx 32 staining and an increased proportion of Cx 43 expressing cells. In the developing prostate, E-cadherin was localized to lateral surfaces of undifferentiated epithelial cells and staining intensity increased as the cells differentiated into luminal cells. By day 30, estrogenized prostates had small foci of epithelial cells that did not immunostain for E-cadherins. In the adult and aged prostates of estrogenized rats, larger foci with differentiation defects and dysplasia were associated with a decrease or loss in E-cadherin staining. The present findings suggest that estrogen-induced changes in the expression of E-cadherin, Cx32 and Cx43 may result in impaired cell-cell adhesion and defective cell-cell communication and may be one of the key mechanisms through which changes toward a dysplastic state are mediated. These findings are significant in light of the data on human prostate cancers where carcinogenesis and progression are associated with loss of E-cadherin and a switch from Cx32 to Cx43 expression in the epithelium.
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214
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Bridges CC, Kekuda R, Wang H, Prasad PD, Mehta P, Huang W, Smith SB, Ganapathy V. Structure, function, and regulation of human cystine/glutamate transporter in retinal pigment epithelial cells. Invest Ophthalmol Vis Sci 2001; 42:47-54. [PMID: 11133847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
PURPOSE The purpose of this investigation was to provide evidence for the expression of the cystine/glutamate transporter (x(c)(-)) in the human retinal pigment epithelial cell line ARPE-19, clone the light chain of the transporter from an ARPE-19 cell cDNA library and study its function, and investigate the regulation of this transporter by nitric oxide (NO) in ARPE-19 cells. METHODS Uptake of radiolabeled cystine and glutamate was measured in ARPE-19 cells. The functional identity of x(c)(-) in these cells was established by substrate specificity and Na(+)-independence of the uptake process. The human x(c)(-) light chain (human xCT) was cloned from an ARPE-19 cell cDNA library. The functional identity of the cloned human xCT was investigated by heterologous coexpression of the light chain with the heavy chain (human 4F2hc) in HeLa cells. ARPE-19 cells were treated with or without the NO donor 3-nitroso-N:-acetylpenicillamine (SNAP) and the expression of x(c)(-) was studied at the functional and molecular levels. RESULTS ARPE-19 cells take up cystine as well as glutamate in the absence of Na(+). Substrate specificity studies indicate that although the uptake of cystine in the absence of Na(+) is mediated by multiple amino acid transport systems including x(c)(-), the uptake of glutamate in the absence of Na(+) occurs exclusively via x(c)(-). The human xCT cloned from ARPE-19 cells is a protein of 501 amino acids. These cells express the heavy chain 4F2hc as evidenced from RT-PCR analysis. Coexpression of human xCT with 4F2hc in HeLa cells leads to the induction of cystine and glutamate uptake with characteristics similar to that of x(c)(-). The activity of x(c)(-) in ARPE-19 cells is upregulated by SNAP, and the process is associated with an increase in the expression of xCT with no detectable change in the expression of 4F2hc. CONCLUSIONS ARPE-19 cells express the cystine/glutamate transporter x(c)(-) (the light chain xCT and the heavy chain 4F2hc) as is evident from functional and molecular studies. NO upregulates this transport system and the process is associated with an increase in xCT mRNA but with no change in 4F2hc mRNA.
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215
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Shah S, Mehta P, Read M, Saayman A, Stallard N. Haematological malignancy on the ICU - can we identify survivors? Crit Care 2001. [PMCID: PMC3333425 DOI: 10.1186/cc1305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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216
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Moalem S, Percy ME, Andrews DF, Kruck TP, Wong S, Dalton AJ, Mehta P, Fedor B, Warren AC. Erratum: are hereditary hemochromatosis mutations involved in alzheimer disease? AMERICAN JOURNAL OF MEDICAL GENETICS 2000; 95:189. [PMID: 11078576 DOI: 10.1002/1096-8628(20001113)95:2<189::aid-ajmg21>3.0.co;2-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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217
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Mehta P, Robson CN, Neal DE, Leung HY. Fibroblast growth factor receptor-2 mutation analysis in human prostate cancer. BJU Int 2000; 86:681-5. [PMID: 11069376 DOI: 10.1046/j.1464-410x.2000.00893.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess whether mutations in the hot-spots of the fibroblast growth factor (FGF) receptor-2 gene (FGFR2, exons encoding the IIIa, IIIb, IIIc and transmembrane domain, TMD) are associated with the development of prostate cancer, as the IIIb variant is the specific receptor for FGF7/KGF, an androgen-inducible paracrine factor regulating prostatic growth. Materials and methods Single-strand conformational polymorphism-polymerase chain reaction (SSCP-PCR) and cycle-sequencing analysis were used to screen FGFR2 mutations in 30 patients with prostate cancer; corresponding blood samples were analysed from 11 of the patients. The human prostate cell lines, LNCaP, PC3, DU145, PNT1A and PNT1B were also examined. In addition, 10 foci of invasive cancer from three patients who underwent radical prostatectomy were also assessed. RESULTS Positive controls containing FGFR2 mutations (Crouzon disease and Pfieffer syndrome) were confirmed by SSCP-PCR and sequencing. Analysis of all prostate tumour samples and prostate-derived cell lines revealed no polymorphisms or mutations in the IIIa, IIIb, IIIc and TMD regions of FGFR2. CONCLUSION FGFR2 mutations in the-FGF binding domain and the TMD are not frequent events in human prostate cancer.
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218
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Mehta P, Shringarpure B. Diet nutrition and health profile of elderly population of urban Baroda. Indian J Public Health 2000; 44:124-8. [PMID: 11439876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
Geriatric population forms a significant proportion of our total population. Hence, various problems affecting the overall health of the elderly need special consideration. In this context, studies were undertaken to assess the socio-demographic factors, diet and health profile of 320 elderly men and women of all the three income groups of Urban Baroda. Data on socio-demographic factors was collected using an open ended questionnaire. Nutritional status was assessed using anthropometric measurements of height, weight, mid upper arm circumference (MUAC) and body mass index (BMI). Information on dietary profile was collected by 24 hour dietary recall method. Fasting practices were also studied. Socio-demographic data of geriatric men of high, middle and low income groups revealed that majority of the subjects were married. A greater percentage of high income group (HIG) men had nuclear family whereas majority of low income groups (LIG) elderly men resided in a joint family. Socio-demographic profile of elderly women of all the 3 income groups revealed that most of the subjects were Hindus. The percentage of widowhood, illiteracy and joint family system were higher in LIG as compared to the elderly women in middle and high income groups (MIG and HIG). Nutrient intake data of elderly men of all the income groups revealed lower consumption of energy, protein, iron and beta-carotene as compared to the RDA whereas fats and vitamin C intakes were higher as compared to the RDA (p < 0.05). The mean nutrient intake, by the LIG elderly women, in terms of energy, protein, iron, calcium, beta-carotene and vitamin C were significantly (p < 0.05) lower than the RDA as well as when compared to the elderly women of MIG and HIG. Mean anthropometric measurements of weight and BMI were higher in elderly HIG and MIG men as compared to the elderly men from LIG. Significant difference was found in all the anthropometric measurements of elderly women of LIG as compared to HIG and MIG. Morbidity profile showed a striking rise in problems of oral cavity, cardio vascular disease, neurological problems and problems of gastro intestinal tract with advancing age in both elderly men and women. The study reveals striking differences in diet, health and disease profile with advancing age.
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219
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Chen H, Zhang YC, Li D, Phillips MI, Mehta P, Shi M, Mehta JL. Protection against myocardial dysfunction induced by global ischemia-reperfusion by antisense-oligodeoxynucleotides directed at beta(1)-adrenoceptor mRNA. J Pharmacol Exp Ther 2000; 294:722-7. [PMID: 10900253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Plasma catecholamine levels rise, and myocardial beta(1)-adrenoceptor (beta(1)-AR) sensitivity increases during ischemia. These factors enhance myocardial injury and cardiac dysfunction. beta(1)-AR blockers are clinically used to protect heart against ischemia and to improve cardiac dysfunction in patients with ischemic heart disease, but these agents often cause intolerable side effects. To examine the potential cardioprotective effect of therapy with antisense-oligodeoxynucleotides directed at beta(1)-AR mRNA (beta(1)-AS-ODNs) during myocardial ischemia-reperfusion, Sprague-Dawley rats were treated with beta(1)-AS-ODNs or inverted-oligodeoxynucleotides (IN-ODNs), each 200 microg/rat. Hearts were excised, perfused, and subjected to global ischemia (30 min) followed by reperfusion (30 min). Other rats were given selective beta(1)-AR blocker atenolol (2 mg/kg) or saline before excising the hearts. Ischemia-reperfusion resulted in cardiac dysfunction, indicated by an increase in coronary perfusion pressure and left ventricular end-diastolic pressure and a decrease in developed left ventricular pressure, as well as evidence of lipid peroxidation in saline-treated rats (all P <.05 versus control values). Administration of AS-ODNs or atenolol, but not IN-ODNs, protected hearts against functional deterioration and lipid peroxidation (P <.05 versus saline or IN-ODNs treatment). AS-ODNs therapy appeared to be equivalent to atenolol in these effects. Expression of beta(1)-AR protein as well as mRNA in the myocardium were markedly up-regulated after ischemia-reperfusion, and treatment with beta(1)-AS-ODNs, but not atenolol, decreased the rise in enhanced expression of beta(1)-AR. These observations imply that beta(1)-AS-ODNs can ameliorate cardiac dysfunction after ischemia-reperfusion by reducing the expression of beta(1)-AR in the ischemic-reperfused myocardium.
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MESH Headings
- Animals
- Coronary Circulation/drug effects
- Coronary Disease/etiology
- Coronary Disease/metabolism
- Coronary Disease/prevention & control
- In Vitro Techniques
- Lipid Peroxidation/drug effects
- Male
- Malondialdehyde/metabolism
- Myocardial Ischemia/complications
- Myocardial Reperfusion Injury/metabolism
- Myocardial Reperfusion Injury/physiopathology
- Myocardial Reperfusion Injury/prevention & control
- Myocardium/metabolism
- Oligonucleotides, Antisense/genetics
- Oligonucleotides, Antisense/therapeutic use
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, beta-1/biosynthesis
- Receptors, Adrenergic, beta-1/genetics
- Stroke Volume/drug effects
- Ventricular Dysfunction, Left/etiology
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/prevention & control
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220
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Moalem S, Percy ME, Andrews DF, Kruck TP, Wong S, Dalton AJ, Mehta P, Fedor B, Warren AC. Are hereditary hemochromatosis mutations involved in Alzheimer disease? AMERICAN JOURNAL OF MEDICAL GENETICS 2000; 93:58-66. [PMID: 10861683 DOI: 10.1002/1096-8628(20000703)93:1<58::aid-ajmg10>3.0.co;2-l] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Mutations in the class I-like major histocompatibility complex gene called HFE are associated with hereditary hemochromatosis (HHC), a disorder of excessive iron uptake. We screened DNA samples from patients with familial Alzheimer disease (FAD) (n = 26), adults with Down syndrome (DS) (n = 50), and older (n = 41) and younger (n = 52) healthy normal individuals, for two HHC point mutations-C282Y and H63D. Because the apolipoprotein E (ApoE) E4 allele is a risk factor for AD and possibly also for dementia of the AD type in DS, DNA samples were also ApoE genotyped. Chi-squared analyses were interpreted at the 0.05 level of significance without Bonferroni corrections. In the pooled healthy normal individuals, C282Y was negatively associated with ApoE E4, an effect also apparent in individuals with DS but not with FAD. Relative to older normals, ApoE E4 was overrepresented in both males and females with FAD, consistent with ApoE E4 being a risk factor for AD; HFE mutations were overrepresented in males and underrepresented in females with FAD. Strong gender effects on the distribution of HFE mutations were apparent in comparisons among ApoE E4 negative individuals in the FAD and healthy normal groups (P < 0.002). Our findings are consistent with the proposition that among ApoE E4 negative individuals HFE mutations are predisposing to FAD in males but are somewhat protective in females. Further, ApoE E4 effects in our FAD group are strongest in females lacking HFE mutations. Relative to younger normals there was a tendency for ApoE E4 and H63D to be overrepresented in males and underrepresented in females with DS. The possibility that HFE mutations are important new genetic risk factors for AD should be pursued further.
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Sandler IN, Tein JY, Mehta P, Wolchik S, Ayers T. Coping efficacy and psychological problems of children of divorce. Child Dev 2000; 71:1099-118. [PMID: 11016569 DOI: 10.1111/1467-8624.00212] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three models of the relations of coping efficacy, coping, and psychological problems of children of divorce were investigated. A structural equation model using cross-sectional data of 356 nine- to twelve-year-old children of divorce yielded results that supported coping efficacy as a mediator of the relations between both active coping and avoiding coping and psychological problems. In a prospective longitudinal model with a subsample of 162 of these children, support was found for Time 2 coping efficacy as a mediator of the relations between Time 1 active coping and Time 2 internalizing of problems. Individual growth curve models over four waves also found support for coping efficacy as a mediator of the relations between active coping and psychological problems. No support was found for alternative models of coping as a mediator of the relations between efficacy and symptoms or for coping efficacy as a moderator of the relations between coping and symptoms.
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Beckman DL, Mehta P, Hanks V, Rowan WH, Liu L. Effects of peroxynitrite on pulmonary edema and the oxidative state. Exp Lung Res 2000; 26:349-59. [PMID: 10914333 DOI: 10.1080/019021400408308] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Excess nitric oxide (NO) generation in the presence of superoxide anion (O2-) leads to the formation of peroxynitrite which may result in lung injury. Oxidant-mediated lung injury has a critical role in pulmonary diseases. We therefore determined whether peroxynitrite causes lung fluid accumulation, lipid peroxidation, and formation of nitrotyrosine using an isolated perfused rat lung model. The lung weight gain during bolus peroxynitrite infusion increased in a dose-dependent manner over a range of 3 to 30 mumole. Concomitantly, bronchoalveolar lavage Ficoll also increased, indicative of increased endothelial permeability. Peroxynitrite increased the production of thiobarbituric acid reactive substances, an index of lipid peroxidation. Furthermore, nitrotyrosine levels in lung tissue rose with increased concentration of peroxynitrite, as determined by Western blot using antinitrotyrosine antibodies. These results suggest that peroxynitrite, formed from NO and O2-, leads to increased pulmonary fluid accumulation, possibly through lipid peroxidation and/or nitration of cell membrane proteins.
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Mehta JL, Mehta P, Li D. Nitric oxide synthase in adult red blood cells: vestige of an earlier age or a biologically active enzyme? THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 2000; 135:430-1. [PMID: 10850640 DOI: 10.1067/mlc.2000.106802] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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224
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Reddy V, Moreb J, Mehta P. Donor lymphocyte infusions for CML: possible effects of age and mobilization. Blood 2000; 95:2994-5. [PMID: 10841613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
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225
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He XY, Merz G, Yang YZ, Pullakart R, Mehta P, Schulz H, Yang SY. Function of human brain short chain L-3-hydroxyacyl coenzyme A dehydrogenase in androgen metabolism. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1484:267-77. [PMID: 10760475 DOI: 10.1016/s1388-1981(00)00014-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Human brain short chain L-3-hydroxyacyl-CoA dehydrogenase (SCHAD) has been demonstrated to be a unique 3alpha-hydroxysteroid dehydrogenase (HSD) that can convert 5alpha-androstane-3alpha, 17beta-diol (3alpha-adiol) to dihydrotestosterone (DHT), whose affinity to the androgen receptor is 10(5)-fold higher than that of 3alpha-adiol. The catalytic efficiency of human SCHAD for this oxidative 3alpha-HSD reaction was estimated to be 164 min(-1) mM(-1), about 10-fold higher than that measured for the backward reaction. Thus, human brain SCHAD may function in androgen metabolism as a new kind of 3alpha-HSD by counteracting all other known 3alpha-HSDs, which would unidirectionally catalyze the reduction of DHT to the almost inactive 3alpha-adiol. Human SCHAD is identical to an amyloid-beta binding protein (ERAB) involved in Alzheimer's disease, which was previously reported to be associated with the endoplasmic reticulum. This protein is, in fact, localized in mitochondria, not endoplasmic reticulum, as evidenced by immunocytochemical studies and its noncleavable mitochondrial targeting sequence and lack of endoplasmic reticulum targeting signals or transmembrane segments. These results prompt the suggestion that the mitochondrion plays not only an essential role in the initial step of steroidogenesis, but also important roles in the intracellular homeostasis of sex steroid hormones. Northern blot analysis revealed that the human SCHAD gene is expressed in both gonadal and peripheral tissues including the prostate whose growth notably requires DHT, the most potent androgen. This study represents the first report of a 3alpha-HSD that could act to generate DHT from 3alpha-adiol and thereby maintain intracellular DHT levels. We propose that inhibitors of the 3alpha-HSD activity of human brain SCHAD could be useful for the treatment of benign prostatic hyperplasia and other disorders involving DHT metabolism, in combination with known inhibitors of steroid 5alpha-reductases.
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