1990 …2021
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Research Output 1990 2019

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2005
85 Citations (Scopus)

DRD4 gene variants and sustained attention in attention deficit hyperactivity disorder (ADHD): Effects of associated alleles at the VNTR and -521 SNP

Bellgrove, M. A., Hawi, Z., Lowe, N., Kirley, A., Robertson, I. H. & Gill, M., 5 Jul 2005, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 136 B, 1, p. 81-86 6 p.

Research output: Contribution to journalArticleResearchpeer-review

61 Citations (Scopus)

Preferential transmission of paternal alleles at risk genes in attention-deficit/hyperactivity disorder

Hawi, Z., Segurado, R., Conroy, J., Sheehan, K., Lowe, N., Kirley, A., Shields, D., Fitzgerald, M., Gallagher, L. & Gill, M., Dec 2005, In : American Journal of Human Genetics. 77, 6, p. 958-965 8 p.

Research output: Contribution to journalArticleResearchpeer-review

68 Citations (Scopus)

The methionine allele of the COMT polymorphism impairs prefrontal cognition in children and adolescents with ADHD

Bellgrove, M. A., Domschke, K., Hawi, Z., Kirley, A., Mullins, C., Robertson, I. H. & Gill, M., Jun 2005, In : Experimental Brain Research. 163, 3, p. 352-360 9 p.

Research output: Contribution to journalArticleResearchpeer-review

99 Citations (Scopus)

Tryptophan hydroxylase 2 (TPH2) gene variants associated with ADHD

Sheehan, K., Lowe, N., Kirley, A., Mullins, C., Fitzgerald, M., Gill, M. & Hawi, Z., Oct 2005, In : Molecular Psychiatry. 10, 10, p. 944-949 6 p.

Research output: Contribution to journalArticleResearchpeer-review

2004
155 Citations (Scopus)

Joint Analysis of the DRD5 Marker Concludes Association with Attention-Deficit/Hyperactivity Disorder Confined to the Predominantly Inattentive and Combined Subtypes

Lowe, N., Kirley, A., Hawi, Z., Sham, P., Wickham, H., Kratochvil, C. J., Smith, S. D., Lee, S. Y., Levy, F., Kent, L., Middle, F., Rohde, L. A., Roman, T., Tahir, E., Yazgan, Y., Asherson, P., Mil, J., Thapar, A., Payton, A., Todd, R. D. & 12 others, Stephens, T., Ebstein, R. P., Manor, I., Barr, C. L., Wigg, K. G., Sinke, R. J., Buitelaar, J. K., Smalley, S. L., Nelson, S. F., Biederman, J., Faraone, S. V. & Gill, M., Feb 2004, In : American Journal of Human Genetics. 74, 2, p. 348-356 9 p.

Research output: Contribution to journalArticleResearchpeer-review

47 Citations (Scopus)

Multiple marker analysis at the promoter region of the DRD4 gene and ADHD: Evidence of linkage and association with the SNP -616

Lowe, N., Kirley, A., Mullins, C., Fitzgerald, M., Gill, M. & Hawi, Z., 15 Nov 2004, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 131 B, 1, p. 33-37 5 p.

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

No Association between Allelic Variants of HOXA1/HOXB1 and Autism

Gallagher, L., Hawi, Z., Kearney, G., Fitzgerald, M. & Gill, M., 1 Jan 2004, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 124 B, 1, p. 64-67 4 p.

Research output: Contribution to journalArticleResearchpeer-review

58 Citations (Scopus)

Phenotype studies of the DRD4 gene polymorphisms in ADHD: Association with oppositional defiant disorder and positive family history

Kirley, A., Lowe, N., Mullins, C., McCarron, M., Daly, G., Waldman, I., Fitzgerald, M., Gill, M. & Hawi, Z., 15 Nov 2004, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 131 B, 1, p. 38-42 5 p.

Research output: Contribution to journalArticleResearchpeer-review

2003
134 Citations (Scopus)

Association of the 480 bp DAT1 allele with methylphenidate response in a sample of Irish children with ADHD

Kirley, A., Lowe, N., Hawi, Z., Mullins, C., Daly, G., Waldman, I., McCarron, M., O'Donnell, D., Fitzgerald, M. & Gill, M., 15 Aug 2003, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 121 B, 1, p. 50-54 5 p.

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

Late onset Alzheimer's disease and apolipoprotein association in the Irish population: Relative risk and attributable fraction

Hawi, Z., Sheehan, K., Lynch, A., Evans, I., Lowe, N., Lawlor, B. & Gill, M., Apr 2003, In : Irish Journal of Medical Science. 172, 2, p. 74-76 3 p.

Research output: Contribution to journalArticleResearchpeer-review

109 Citations (Scopus)

Linkage disequilibrium mapping at DAT1, DRD5 and DBH narrows the search for ADHD susceptibility alleles at these loci

Hawi, Z., Lowe, N., Kirley, A., Gruenhage, F., Nöthen, M., Greenwood, T., Kelsoe, J., Fitzgerald, M. F. & Gill, M., 2003, In : Molecular Psychiatry. 8, 3, p. 299-308 10 p.

Research output: Contribution to journalArticleResearchpeer-review

2002
81 Citations (Scopus)

Association of DRD4 in children with ADHD and comorbid conduct problems

Holmes, J., Payton, A., Barrett, J., Harrington, R., McGuffin, P., Owen, M., Ollier, W., Worthington, J., Gill, M., Kirley, A., Hawi, Z., Fitzgerald, M., Asherson, P., Curran, S., Mill, J., Gould, A., Taylor, E., Kent, L., Craddock, N. & Thapar, A., 8 Mar 2002, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 114, 2, p. 150-153 4 p.

Research output: Contribution to journalArticleResearchpeer-review

157 Citations (Scopus)

Dopaminergic system genes in ADHD: Toward a biological hypothesis

Kirley, A., Hawi, Z., Daly, G., McCarron, M., Mullins, C., Millar, N., Waldman, I., Fitzgerald, M. & Gill, M., Oct 2002, In : Neuropsychopharmacology. 27, 4, p. 607-619 13 p.

Research output: Contribution to journalArticleResearchpeer-review

124 Citations (Scopus)

Evidence that variation at the serotonin transporter gene influences susceptibility to attention deficit hyperactivity disorder (ADHD): Analysis and pooled analysis

Kent, L., Doerry, U., Hardy, E., Parmar, R., Gingell, K., Hawi, Z., Kirley, A., Lowe, N., Fitzgerald, M., Gill, M. & Craddock, N., 2002, In : Molecular Psychiatry. 7, 8, p. 908-912 5 p.

Research output: Contribution to journalArticleResearchpeer-review

140 Citations (Scopus)

Serotonergic system and attention deficit hyperactivity disorder (ADHD): A potential susceptibility locus at the 5-HT1B receptor gene in 273 nuclear families from a multi-centre sample

Hawi, Z., Dring, M., Kirley, A., Foley, D., Kent, L., Craddock, N., Asherson, P., Curran, S., Gould, A., Richards, S., Lawson, D., Pay, H., Turic, D., Langley, K., Owen, M., O'Donovan, M., Thapar, A., Fitzgerald, M. & Gill, M., 2002, In : Molecular Psychiatry. 7, 7, p. 718-725 8 p.

Research output: Contribution to journalArticleResearchpeer-review

130 Citations (Scopus)

Synaptosomal-associated protein 25 (SNAP-25) and attention deficit hyperactivity disorder (ADHD): Evidence of linkage and association in the Irish population

Brophy, K., Hawi, Z., Kirley, A., Fitzgerald, M. & Gill, M., 2002, In : Molecular Psychiatry. 7, 8, p. 913-917 5 p.

Research output: Contribution to journalArticleResearchpeer-review

2001

A review of attention deficit hyperactivity disorder and dopamine system candidate

Kirley, A., Hawi, Z., McCarron, M., Mullins, C., Fitzgerald, M. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 634 1 p.

Research output: Contribution to journalArticleResearchpeer-review

A significant association of serotonin transporter polymorphism haplotypes in attention deficit hyperactivity disorder (ADHD)

Kent, L., Hardy, E., Hawi, Z., Fitzgerald, M., Kirley, A., Gill, M. & Craddock, N., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 574-575 2 p.

Research output: Contribution to journalArticleResearchpeer-review

Attention deficit hyperactivity disorder (ADHD) and 5HT2C receptor: A slight increase in the transmission of Cys23 to ADHD cases

Nugent, E., Hawi, Z., Lowe, N., Kirley, A., Fitzgerald, M. F. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 637 1 p.

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)

Dopa decarboxylase gene polymorphisms and attention deficit hyperactivity disorder (ADHD): No evidence for association in the Irish population

Hawi, Z., Foley, D., Kirley, A., McCarron, M., Fitzgerald, M. & Gill, M., 2001, In : Molecular Psychiatry. 6, 4, p. 420-424 5 p.

Research output: Contribution to journalArticleResearchpeer-review

Haplotype analysis at the DAT1 locus suggests that the variant contributing to ADHD may map to the 3′end of the gene

Hawi, Z. H., Lowe, N. T., Kirley, A., Fitzgerald, M. & Gill, 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 573 1 p.

Research output: Contribution to journalArticleResearchpeer-review

New evidence, supporting an association between attention deficit hyperactivity disorder and the DRD5 locus in the IRISH population

Lowe, N. T., Hawi, Z., Kirley, A., Mullins, C., Fitzgerald, M. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 635 1 p.

Research output: Contribution to journalArticleOtherpeer-review

59 Citations (Scopus)

Nicotinic acetylcholine receptor α4 subunit gene polymorphism and attention deficit hyperactivity disorder

Kent, L., Middle, F., Hawi, Z., Fitzgerald, M., Gill, M., Feehan, C. & Craddock, N., 2001, In : Psychiatric Genetics. 11, 1, p. 37-40 4 p.

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

No association between CHRNA7 microsatellite markers and attention-deficit hyperactivity disorder

Kent, L., Green, E., Holmes, J., Thapar, A., Gill, M., Hawi, Z., Fitzgerald, M., Asherson, P., Curran, S., Mills, J., Payton, A. & Craddock, N., 8 Dec 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 8, p. 686-689 4 p.

Research output: Contribution to journalArticleResearchpeer-review

No association of allelic variant of HOXA1 and autism

Gallagher, L., Hawi, Z., Kearney, G., Fitzgerald, M. F. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 632 1 p.

Research output: Contribution to journalArticleResearchpeer-review

Serotonergic system and attention deficit hyperactivity disorder (ADHD): A potential susceptibility locus at the 5-HT1B receptor gene in 271 nuclear families from a multi-centre sample

Hawi, Z., Dring, M., Kirley, A., Kent, L., Asherson, P., Thapar, A. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 636 1 p.

Research output: Contribution to journalArticleResearchpeer-review

Synaptosomal-associated protein 25 (SNAP-25) and attention deficit hyperactivity disorder (ADHD): Evidence of linkage and association in the Irish population

Hawi, Z., Brophy, K., Kirley, A., Fitzgerald, M. & Gill, M., 8 Oct 2001, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 105, 7, p. 634 1 p.

Research output: Contribution to journalArticleResearchpeer-review

2000

Nicotinic acetylcholine receptor 7 subunit gene and attention deficit hyperactivity disorder

Kent, L., Green, E., Fitzgerald, M. F., Hawi, Z., Gill, M., Thapar, A., Holmes, J., Asherson, P., Gould, A., Taylor, E., Payton, T. & Craddock, N., 7 Aug 2000, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 96, 4, p. 490 1 p.

Research output: Contribution to journalArticleResearchpeer-review

50 Citations (Scopus)

No association between catechol-O-methyltransferase (COMT) gene polymorphism and attention deficit hyperactivity disorder (ADHD) in an Irish sample

Hawi, Z., Millar, N., Daly, G., Fitzgerald, M. & Gill, M., 12 Jun 2000, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 96, 3, p. 282-284 3 p.

Research output: Contribution to journalArticleOtherpeer-review

No association of serotonin transporter gene polymorphisms with Attention Deficit Hyperactivity Disorder

Hawi, Z., Kirley, A., Mullins, C., Fitzgerald, M. F. & Gill, M., 7 Aug 2000, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 96, 4, p. 490 1 p.

Research output: Contribution to journalArticleOtherpeer-review

86 Citations (Scopus)

No association of the dopamine DRD4 receptor (DRD4) gene polymorphism with attention deficit hyperactivity disorder (ADHD) in the Irish population

Hawi, Z., McCarron, M., Kirley, A., Daly, G., Fitzgerald, M. & Gill, M., 12 Jun 2000, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 96, 3, p. 268-272 5 p.

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

No association of the DRD2 polymorphism and attention deficit hyperactivity disorder in the Irish population

Kirley, A., Hawi, Z., Mullins, C., Fitzgerald, M. & Gill, M., 7 Aug 2000, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 96, 4, p. 488 1 p.

Research output: Contribution to journalArticleOtherpeer-review

1999
18 Citations (Scopus)

HLA and schizophrenia: Refutation of reported associations with A9 (A23/A24), DR4, and DQβ1 *0602

Gibson, S., Hawi, Z., Straub, R. E., Walsh, D., Kendler, K. S. & Gill, M., 20 Aug 1999, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 88, 4, p. 416-421 6 p.

Research output: Contribution to journalArticleResearchpeer-review

329 Citations (Scopus)

Mapping susceptibility loci in attention deficit hyperactivity disorder: Preferential transmission of parental alleles at DAT1, DBH and DRD5 to affected children

Daly, G., Hawi, Z., Fitzgerald, M. & Gill, M., 1999, In : Molecular Psychiatry. 4, 2, p. 192-196 5 p.

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

No evidence to support the association of the potassium channel gene hSKCa3 CAG repeat with schizophrenia or bipolar disorder in the Irish population

Hawi, Z., Mynett-Johnson, L., Murphy, V., Straub, R. E., Kendler, K. S., Walsh, D., McKeon, P. & Gill, M., 1999, In : Molecular Psychiatry. 4, 5, p. 488-491 4 p.

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Presenilin 1 and α-1-antichymotrypsin polymorphisms in Down syndrome: No effect on the presence of dementia

Tyrrell, J., Cosgrave, M., McPherson, J., Hawi, Z., Trulock, V., Calvert, J., Lawlor, B. & Gill, M., 15 Dec 1999, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 88, 6, p. 616-620 5 p.

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Pseudoautosomal gene: Possible association with bipolar males but not with schizophrenia

Hawi, Z., Mynett-Johnson, L., Gill, M., Murphy, V., Straubl, R. E., Kendler, K. S., Walsh, D., Machen, F., Connell, H., McKeon, P. & Shields, D., 1999, In : Psychiatric Genetics. 9, 3, p. 129-134 6 p.

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Schizophrenia and HLA: No association with PCR-SSOP typed classical loci in a large Irish familial sample

Hawi, Z., Gibson, S., Straub, R. E., Walsh, D., Kendler, K. S. & Gill, M., 20 Aug 1999, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 88, 4, p. 422-429 8 p.

Research output: Contribution to journalArticleResearchpeer-review

1998
29 Citations (Scopus)

A protective effect of apolipoprotein E e2 allele on dementia in Down's syndrome

Tyrrell, J., Cosgrave, M., Hawi, Z., McPherson, J., O'Brien, C., McCalvert, J., McLaughlin, M., Lawlor, B. & Gill, M., 15 Mar 1998, In : Biological Psychiatry. 43, 6, p. 397-400 4 p.

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Attention deficit hyperactivity disorder: Association with the dopamine transporter (DAT1) but not with the dopamine D4 receptor (DRD4)

Daly, G., Hawi, Z., Fitzgerald, M. & Gill, M., 6 Nov 1998, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 81, 6, p. 501 1 p.

Research output: Contribution to journalArticleOtherpeer-review

82 Citations (Scopus)

European Multicentre Association Study of Schizophrenia: A study of the DRD2 Ser311Cys and DRD3 Ser9Gly polymorphisms

Spurlock, G., Williams, J., McGuffin, P., Aschauer, H. N., Lenzinger, E., Fuchs, K., Sieghart, W. C., Meszaros, K., Fathi, N., Laurent, C., Mallet, J., Macciardi, F., Pedrini, S., Gill, M., Hawi, Z., Gibson, S., Jazin, E. E., Yang, H. T., Adolfsson, R., Pato, C. N. & 2 others, Dourado, A. M. & Owen, M. J., 7 Feb 1998, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 81, 1, p. 24-28 5 p.

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)

Examination of new and reported data of the DRD3/Mscl polymorphism: No support for the proposed association with schizophrenia

Hawi, Z., McCabe, U., Straub, R. E., O'Neill, A., Kendler, K. S., Walsh, D. & Gill, M., 1998, In : Molecular Psychiatry. 3, 2, p. 150-155 6 p.

Research output: Contribution to journalArticleResearchpeer-review

24 Citations (Scopus)

MDMA toxicity: No evidence for a major influence of metabolic genotype at CYP2D6

O'Donohoe, A., O'Flynn, K., Shields, K., Hawi, Z. & Gill, M., 1998, In : Addiction Biology. 3, 3, p. 309-314 6 p.

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

No evidence to support the association of the potassium channel gene hSKCa3 cag repeat with schizophrenia or bipolar affective disorder in irish population

Hawi, Z., Mynett-Johnson, L., Murphy, V., Straub, R. E., Kendler, K. S., Walsh, D., McKeon, P. & Gill, M., 6 Nov 1998, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 81, 6, p. 508 1 p.

Research output: Contribution to journalArticleResearchpeer-review

56 Citations (Scopus)

No linkage or linkage disequilibrium between brain-derived neurotrophic factor (BDNF) dinucleotide repeat polymorphism and schizophrenia in Irish families

Hawi, Z., Straub, R. E., O'Neill, A., Kendler, K. S., Walsh, D. & Gill, M., 16 Nov 1998, In : Psychiatry Research. 81, 2, p. 111-116 6 p.

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Schizophrenia and HLA: No association with PCR-SSOP typed classical loci in a large Irish familial sample

Hawi, Z., Gibson, S., Straub, R., Walsh, D., Kendler, K. S. & Gill, M., 6 Nov 1998, In : American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. 81, 6, p. 417-421 6 p.

Research output: Contribution to journalArticleResearchpeer-review

1997
415 Citations (Scopus)

Confirmation of association between attention deficit hyperactivity disorder and a dopamine transporter polymorphism

Gill, M., Daly, G., Heron, S., Hawi, Z. & Fitzgerald, M., 1997, In : Molecular Psychiatry. 2, 4, p. 311-313 3 p.

Research output: Contribution to journalArticleResearchpeer-review

Genes conferring risk for Alzheimer's disease: Their role in the development of dementia in Down's syndrome

Gill, M., Tyrell, J., Cosgrave, M., Hawi, Z. & Lawlor, B., 1997, In : Genetic Counseling. 8, 3, p. 258 1 p.

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Homozygous mutation at cytochrome P4502D6 in an individual with schizophrenia: Implications for antipsychotic drugs, side effects and compliance

Gill, M., Hawi, Z. & Webb, M., 1997, In : Irish Journal of Psychological Medicine. 14, 1, p. 38-39 2 p.

Research output: Contribution to journalArticleResearchpeer-review

1996
8 Citations (Scopus)

Lower frequency of apolipoprotein E4 allele in an 'elderly' Down's syndrome population

Cosgrave, M., Tyrrell, J., Dreja, H., Hawi, Z., Lawlor, B. A. & Gill, M., 15 Oct 1996, In : Biological Psychiatry. 40, 8, p. 811-813 3 p.

Research output: Contribution to journalArticleResearchpeer-review