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Your search keyword '"McLenachan S"' showing total 8 results
Start Over Author "McLenachan S" Publisher elsevier b.v.
8 results on '"McLenachan S"'

2. Generation of an induced pluripotent stem cell line from a patient with Stargardt disease caused by biallelic c.[5461–10T>C;5603A>T];[6077T>C] mutations in the ABCA4 gene

Author

Huang, D., Zhang, D., Chen, S-C, Thandar Aung-Htut, M., Lamey, T.M., Thompson, J.A., McLaren, T.L., De Roach, J.N., Fletcher, S., Wilton, S.D., McLenachan, S., Chen, F.K., Huang, D., Zhang, D., Chen, S-C, Thandar Aung-Htut, M., Lamey, T.M., Thompson, J.A., McLaren, T.L., De Roach, J.N., Fletcher, S., Wilton, S.D., McLenachan, S., and Chen, F.K.

Abstract

Mutations in ABCA4 gene are causative for autosomal recessive Stargardt disease (STGD1), the most common inherited retinal dystrophy. Here, we report the generation of an induced pluripotent stem cell (iPSC) line from a STGD1 patient carrying biallelic c.[5461–10T>C;5603A>T];[6077T>C] mutations in the ABCA4 gene. Episomes carrying OCT4, SOX2, KLF4, L-MYC, LIN28 and mp53DD were employed for the reprogramming of patient-derived fibroblasts. This iPSC line expressed comparable pluripotency markers as in a commercially available human iPSC line, displayed normal karyotype and potential for trilineage differentiation, and were negative for both reprogramming episomes and mycoplasma test.

Published
2021

3. Generation of two induced pluripotent stem cell lines from a patient with Stargardt disease caused by compound heterozygous mutations in the ABCA4 gene

Author

Huang, D., Zhang, D., Chen, S-C, Aung-Htut, M.T., Lamey, T.M., Thompson, J.A., McLaren, T.L., De Roach, J.N., Fletcher, S., Wilton, S.D., Chen, F.K., McLenachan, S., Huang, D., Zhang, D., Chen, S-C, Aung-Htut, M.T., Lamey, T.M., Thompson, J.A., McLaren, T.L., De Roach, J.N., Fletcher, S., Wilton, S.D., Chen, F.K., and McLenachan, S.

Abstract

Stargardt disease (STGD1) is the most common inherited retinal dystrophy and ABCA4 c.546-–10 T>C is the most commonly reported splice mutation. Here, we generated and characterized two induced pluripotent stem cell (iPSC) lines from a STGD1 patient with compound heterozygous mutations in ABCA4 (c.[5461-10 T > C;5603A > T];[4163 T > C;455G > A]). Episomal vectors containing OCT4, SOX2, KLF4, L-MYC, LIN28 and mp53DD were employed to conduct the reprogramming of patient-derived fibroblasts. Both lines had a normal karyotype, displayed iPSC morphology, expressed pluripotency markers and showed trilineage differentiation potential. These lines can provide a powerful platform for further investigating the pathophysiological consequences of mutations in ABCA4.

Published
2021

4. Generation of three induced pluripotent stem cell lines from a patient with Usher syndrome caused by biallelic c.949C > A and c.1256G > T mutations in the USH2A gene

Author

Zaw, K., Wong, E.Y.M., Zhang, X., Zhang, D., Chen, S-C, Thompson, J.A., Lamey, T., McLaren, T., De Roach, J.N., Wilton, S.D., Fletcher, S., Mitrpant, C., Atlas, M.D., Chen, F.K., McLenachan, S., Zaw, K., Wong, E.Y.M., Zhang, X., Zhang, D., Chen, S-C, Thompson, J.A., Lamey, T., McLaren, T., De Roach, J.N., Wilton, S.D., Fletcher, S., Mitrpant, C., Atlas, M.D., Chen, F.K., and McLenachan, S.

Abstract

Mutations in the USH2A gene are the most common cause of Usher syndrome and autosomal recessive non-syndromic retinitis pigmentosa. Here, we describe the generation of three induced pluripotent stem cell lines from dermal fibroblasts derived from a patient carrying biallelic c.949C > A and c.1256G > T variants in the USH2A gene, using episomal reprogramming plasmids expressing OCT4, SOX2, KLF4, MYCL, LIN28, mir302/367 and shRNA targeting TP53. All three lines expressed pluripotency markers, displayed unaltered karyotypes as well as trilineage differentiation potential, and were negative for reprogramming episomes and mycoplasma.

Published
2021

5. Generation of two induced pluripotent stem cell lines from a patient with recessive inherited retinal disease caused by compound heterozygous mutations in SNRNP200

Author

Zhang, D., McLenachan, S., Chen, S.-C., Zaw, K., Alziyadat, Y., Zhang, X., Lamey, T.M., Thompson, J.A., McLaren, T.L., Mellough, C., De Roach, J.N., Chen, F.K., Zhang, D., McLenachan, S., Chen, S.-C., Zaw, K., Alziyadat, Y., Zhang, X., Lamey, T.M., Thompson, J.A., McLaren, T.L., Mellough, C., De Roach, J.N., and Chen, F.K.

Abstract

The human induced pluripotent stem cell (iPSC) lines LEIi015-A and LEIi015-B were derived from a patient with inherited retinal disease caused by compound heterozygous mutations in the SNRNP200 gene (c.[1792C>T];[3341T>C]). Dermal fibroblasts were transfected with episomal plasmids carrying transgenes encoding OCT4, SOX2, KLF4, L-MYC, LIN28, mir302/367 microRNA and shRNA for P53. The clonal iPSC lines LEIi015-A and LEIi015-B expressed iPSC markers, were free from genomic alterations and demonstrated trilineage differentiation potential.

Published
2021

6. Generation of two induced pluripotent stem cell lines from a patient with dominant PRPF31 mutation and a related non-penetrant carrier

Author

McLenachan, S., Zhang, D., Zhang, X., Chen, S-C, Lamey, T., Thompson, J.A., McLaren, T., De Roach, J.N., Fletcher, S., Chen, F.K., McLenachan, S., Zhang, D., Zhang, X., Chen, S-C, Lamey, T., Thompson, J.A., McLaren, T., De Roach, J.N., Fletcher, S., and Chen, F.K.

Abstract

We report the generation of the human iPSC line LEIi008-A from a patient with retinitis pigmentosa-11 caused by a dominant nonsense mutation in the PRPF31 gene (NM_015629.3:c.1205C > A p.(Ser402Ter)). A second line, LEIi009-A, was generated from a related non-penetrant carrier of the same mutation with no retinal disease. Reprogramming of patient dermal fibroblasts using episomal plasmids containing OCT4, SOX2, KLF4, L-MYC, LIN28, shRNA for p53 and mir302/367 microRNA generated cell lines displaying pluripotent stem cell marker expression, a normal karyotype and the capability to differentiate into the three germ layer lineages.

Published
2018

7. Breast arterial calcification on mammography and risk of coronary artery disease: a SCOT-HEART sub-study.

Author

McLenachan, S., Camilleri, F., Smith, M., Newby, D.E., and Williams, M.C.

Subjects
*CORONARY disease, *CALCIFICATIONS of the breast, *ARTERIAL calcification, *CARDIOVASCULAR diseases risk factors, *MAMMOGRAMS, *CORONARY arteries
Abstract

Aim: To assess the prevalence of breast arterial calcification (BAC) in patients who also underwent routine surveillance mammography, and to determine the association with cardiovascular risk factors, coronary artery calcification, and coronary artery disease on coronary computed tomography angiography (CCTA).Materials and Methods: Four hundred and five female participants were identified who had undergone CCTA and subsequent mammography in the SCOT-HEART randomised controlled trial of CCTA in patients with suspected stable angina. Mammograms were assessed visually for the presence and severity of BAC.Results: BAC was identified in 93 (23%) patients. Patients with BAC were slightly older (63±7 versus 59±8 years, p<0.001), with a higher cardiovascular risk score (19±11 versus 16±10, p=0.022) and were more likely to be non-smokers (73% versus 49%, p<0.001). In patients with BAC, coronary artery calcification was present in 58 patients (62%; relative risk [RR] 1.26, 95% confidence intervals [CI]: 1.04, 1.53; p=0.02), non-obstructive coronary artery disease in 58 (62%; RR 1.27, 95% CI: 1.04 to 1.54, p=0.02), and obstructive coronary artery disease in 19 (20%; RR 1.62, 95% CI: 0.98, 2.66; p=0.058). Patients without BAC were very unlikely to have severe coronary artery calcification (negative predictive value 95%) but the diagnostic accuracy of BAC to identify coronary artery disease was poor (AUC 0.547).Conclusion: Although BAC is associated with the presence and severity of coronary artery calcification, the diagnostic accuracy to identify patients with coronary artery disease or obstructive coronary artery disease is poor. [ABSTRACT FROM AUTHOR]

Published
2019
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8. Growth hormone promotes proliferation of adult neurosphere cultures.

Author

McLenachan, S., Lum, M.-G., Waters, M.J., and Turnley, A.M.

Subjects
SOMATOTROPIN, HORMONE receptors, CELL proliferation, NEURAL stem cells, CELL culture, CELLULAR signal transduction, LABORATORY mice
Abstract

Abstract: Objectives: Growth hormone (GH) and its receptor (GHR) are widely expressed in the CNS. During development, GH signaling regulates both proliferation of neural progenitor cells as well as their differentiation into neurons and glia. Here we have examined the effect of GH signaling on adult subventricular zone derived neural progenitor cells cultured as neurospheres. Design: GH was added to adult wild-type (WT) neurosphere cultures and neurosphere growth measured using the MTT cell proliferation assay. To examine the influence of endogenous GH production on neural progenitors, neurospheres derived from GH receptor knockout (GHRKO) mice were examined by measuring neurosphere sizes and Ki67 and TUNEL immunoreactivity. In addition, neurosphere growth curves were compared following long term culture. Finally, the differentiation of WT vs. GHRKO neurospheres was compared using immunocytochemistry for βIII-tubulin and GFAP. Results: While GH alone was insufficient to support neurosphere formation, it enhanced neurosphere growth by 20% in the presence of epidermal growth factor and fibroblast growth factor-2. Compared to wildtype neurospheres, GHRKO neurospheres were smaller, contained fewer proliferating cells and exhibited reduced self-renewal in long term culture. Addition of GH increased STAT5 phosphorylation levels in neurosphere cells. Upon differentiation, GHRKO neurospheres showed accelerated neurogenesis, although over time similar numbers of βIII-tubulin positive neurons were generated by cells of both genotypes. Conclusions: GH functions as an autocrine mitogen in adult neurosphere cultures and promotes proliferation of neural progenitor cells as well as self-renewal of neurosphere cultures. In addition, signaling through the GHR appeared to delay neuronal differentiation in adult neurospheres. [Copyright &y& Elsevier]

Published
2009
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