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1. Amyloid and tau pathology associations with personality traits, neuropsychiatric symptoms, and cognitive lifestyle in the preclinical phases of sporadic and autosomal dominant Alzheimer’s disease

Author

Pichet Binette, A., Vachon-Presseau, É., Morris, J., Bateman, R., Benzinger, T., Collins, D.L., Poirier, J., Breitner, J.C.S., Villeneuve, S., Allegri, R., Amtashar, F., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, Jill, Buckles, V., Chea, S., Chhatwal, J., Chrem, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., D‘Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., DiBari, S.H., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Kuder-Buletta, E., Laske, C., Lee, J-H, Levin, J., Marcus, D., Martins, R., Mason, N.S., Masters, C., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Norton, J., Perrin, R., Raichle, M., Ringman, J., Roh, J.H., Salloway, S., Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., Xu, X., Tam, A., Labonté, A., Faubert, A-M, Mathieu, A., Madjar, C., Carrier, C.E., Dansereau, C., Kazazian, C., Lepage, C., Picard, C., Maillet, D., Michaud, D., Couture, D., Dea, D., Cuello, C., Barkun, A., Evans, A., Courcot, B., Tardif, C., Debacker, C., Jack, C.R., Fontaine, D., Knopman, D.S., Maultaup, G., Near, J., Leoutsakos, J-M, Maltais, J-R, Brandt, J., Pruessner, J., Morris, J.C., Cheewakriengkrai, L., Münter, L-M, Collins, L., Chakravarty, M., Sager, M.A., Dauar-Tedeschi, M., Eisenberg, M., Rajah, N., Aisen, P., Toussaint, J., Rosa-Neto, P., Bellec, P., Kostopoulos, P., Etienne, P., Tariot, P.N., Orban, P., Sperling, R.A., Hoge, R., Thomas, R.G., Gauthier, S., Craft, S., Montine, T.J., Nair, V., Bohbot, V., Venugopalan, V., Fonov, V., Ituria-Medina, Y., Khachaturian, Z.S., Teigner, E., Anthal, E., Yu, E., Ferdinand, F., Pogossova, G., Mayrand, G., Duclair, G., Gagné, G., Newbold-Fox, H., Leppert, I., Vallée, I., Vogel, J.W., Tremblay-Mercier, J., Frenette, J., Frappier, J., Kat, J., Miron, J., Wan, K., Mahar, L., Carmo, L., Théroux, L., Dadar, M., Dufour, M., Lafaille-Magnan, M-E, Appleby, M., Savard, M., Tuwaig, M., Petkova, M., Rioux, P., Meyer, P-F, El-Khoury, R., Gordon, R., Giles, R., Das, S., Wang, S., Tabrizi, S., Mathotaarachchi, S., Dubuc, S., Lee, T., Beaudry, T., Gervais, V., Pagé, V., Gonneaud, J., Ayranci, G., Pascoal, T.A., Desautels, R., Benbouhoud, F., Saint-Fort, E.F., Verfaillie, S.C.J., Farzin, S., Salaciak, A., Tullo, S., Vachon-Presseau, E., Daoust, L-A, Köbe, T., Spreng, N., McSweeney, M., Nilsson, N., Pishnamazi, M., Bedetti, C., Pichet Binette, A., Vachon-Presseau, É., Morris, J., Bateman, R., Benzinger, T., Collins, D.L., Poirier, J., Breitner, J.C.S., Villeneuve, S., Allegri, R., Amtashar, F., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, Jill, Buckles, V., Chea, S., Chhatwal, J., Chrem, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., D‘Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., DiBari, S.H., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Kuder-Buletta, E., Laske, C., Lee, J-H, Levin, J., Marcus, D., Martins, R., Mason, N.S., Masters, C., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Norton, J., Perrin, R., Raichle, M., Ringman, J., Roh, J.H., Salloway, S., Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., Xu, X., Tam, A., Labonté, A., Faubert, A-M, Mathieu, A., Madjar, C., Carrier, C.E., Dansereau, C., Kazazian, C., Lepage, C., Picard, C., Maillet, D., Michaud, D., Couture, D., Dea, D., Cuello, C., Barkun, A., Evans, A., Courcot, B., Tardif, C., Debacker, C., Jack, C.R., Fontaine, D., Knopman, D.S., Maultaup, G., Near, J., Leoutsakos, J-M, Maltais, J-R, Brandt, J., Pruessner, J., Morris, J.C., Cheewakriengkrai, L., Münter, L-M, Collins, L., Chakravarty, M., Sager, M.A., Dauar-Tedeschi, M., Eisenberg, M., Rajah, N., Aisen, P., Toussaint, J., Rosa-Neto, P., Bellec, P., Kostopoulos, P., Etienne, P., Tariot, P.N., Orban, P., Sperling, R.A., Hoge, R., Thomas, R.G., Gauthier, S., Craft, S., Montine, T.J., Nair, V., Bohbot, V., Venugopalan, V., Fonov, V., Ituria-Medina, Y., Khachaturian, Z.S., Teigner, E., Anthal, E., Yu, E., Ferdinand, F., Pogossova, G., Mayrand, G., Duclair, G., Gagné, G., Newbold-Fox, H., Leppert, I., Vallée, I., Vogel, J.W., Tremblay-Mercier, J., Frenette, J., Frappier, J., Kat, J., Miron, J., Wan, K., Mahar, L., Carmo, L., Théroux, L., Dadar, M., Dufour, M., Lafaille-Magnan, M-E, Appleby, M., Savard, M., Tuwaig, M., Petkova, M., Rioux, P., Meyer, P-F, El-Khoury, R., Gordon, R., Giles, R., Das, S., Wang, S., Tabrizi, S., Mathotaarachchi, S., Dubuc, S., Lee, T., Beaudry, T., Gervais, V., Pagé, V., Gonneaud, J., Ayranci, G., Pascoal, T.A., Desautels, R., Benbouhoud, F., Saint-Fort, E.F., Verfaillie, S.C.J., Farzin, S., Salaciak, A., Tullo, S., Vachon-Presseau, E., Daoust, L-A, Köbe, T., Spreng, N., McSweeney, M., Nilsson, N., Pishnamazi, M., and Bedetti, C.

Abstract

Background Major prevention trials for Alzheimer’s disease (AD) are now focusing on multidomain lifestyle interventions. However, the exact combination of behavioral factors related to AD pathology remains unclear. In 2 cohorts of cognitively unimpaired individuals at risk of AD, we examined which combinations of personality traits, neuropsychiatric symptoms, and cognitive lifestyle (years of education or lifetime cognitive activity) related to the pathological hallmarks of AD, amyloid-β, and tau deposits. Methods A total of 115 older adults with a parental or multiple-sibling family history of sporadic AD (PREVENT-AD [PRe-symptomatic EValuation of Experimental or Novel Treatments for AD] cohort) underwent amyloid and tau positron emission tomography and answered several questionnaires related to behavioral attributes. Separately, we studied 117 mutation carriers from the DIAN (Dominant Inherited Alzheimer Network) study group cohort with amyloid positron emission tomography and behavioral data. Using partial least squares analysis, we identified latent variables relating amyloid or tau pathology with combinations of personality traits, neuropsychiatric symptoms, and cognitive lifestyle. Results In PREVENT-AD, lower neuroticism, neuropsychiatric burden, and higher education were associated with less amyloid deposition (p = .014). Lower neuroticism and neuropsychiatric features, along with higher measures of openness and extraversion, were related to less tau deposition (p = .006). In DIAN, lower neuropsychiatric burden and higher education were also associated with less amyloid (p = .005). The combination of these factors accounted for up to 14% of AD pathology. Conclusions In the preclinical phase of both sporadic and autosomal dominant AD, multiple behavioral features were associated with AD pathology. These results may suggest potential pathways by which multidomain interventions might help delay AD onset or progression.

Published
2020

2. A soluble phosphorylated tau signature links tau, amyloid and the evolution of stages of dominantly inherited Alzheimer’s disease

Author

Barthélemy, N.R., Li, Y., Joseph-Mathurin, N., Gordon, B.A., Hassenstab, J., Benzinger, T.L.S., Buckles, V., Fagan, A.M., Perrin, R.J., Goate, A.M., Morris, J.C., Karch, C.M., Xiong, C., Allegri, R., Mendez, P.C., Berman, S.B., Ikeuchi, T., Mori, H., Shimada, H., Shoji, M., Suzuki, K., Noble, J., Farlow, M., Chhatwal, J., Graff-Radford, N.R., Salloway, S., Schofield, P.R., Masters, C.L., Martins, R.N., O’Connor, A., Fox, N.C., Levin, J., Jucker, M., Gabelle, A., Lehmann, S., Sato, C., Bateman, R.J., McDade, E., Bateman, R., Bechara, J., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Chea, S., Chrem Mendez, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Fitzpatrick, C., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Groves, A., Hoechst-Swisher, L., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikonomovic, S., Jerome, G., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Kuder-Buletta, E., Laske, C., Lee, J-H, Martins, R., Mason, N.S., Masters, C., Maue-Dreyfus, D., Morris, J., Nagamatsu, A., Neimeyer, K., Norton, J., Perrin, R., Raichle, M., Renton, A., Ringman, J., Roh, J.H., Schofield, P., Sigurdson, W., Sohrabi, H., Sparks, P., Taddei, K., Wang, P., Xu, X., Barthélemy, N.R., Li, Y., Joseph-Mathurin, N., Gordon, B.A., Hassenstab, J., Benzinger, T.L.S., Buckles, V., Fagan, A.M., Perrin, R.J., Goate, A.M., Morris, J.C., Karch, C.M., Xiong, C., Allegri, R., Mendez, P.C., Berman, S.B., Ikeuchi, T., Mori, H., Shimada, H., Shoji, M., Suzuki, K., Noble, J., Farlow, M., Chhatwal, J., Graff-Radford, N.R., Salloway, S., Schofield, P.R., Masters, C.L., Martins, R.N., O’Connor, A., Fox, N.C., Levin, J., Jucker, M., Gabelle, A., Lehmann, S., Sato, C., Bateman, R.J., McDade, E., Bateman, R., Bechara, J., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Chea, S., Chrem Mendez, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Fitzpatrick, C., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Groves, A., Hoechst-Swisher, L., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikonomovic, S., Jerome, G., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Kuder-Buletta, E., Laske, C., Lee, J-H, Martins, R., Mason, N.S., Masters, C., Maue-Dreyfus, D., Morris, J., Nagamatsu, A., Neimeyer, K., Norton, J., Perrin, R., Raichle, M., Renton, A., Ringman, J., Roh, J.H., Schofield, P., Sigurdson, W., Sohrabi, H., Sparks, P., Taddei, K., Wang, P., and Xu, X.

Abstract

Development of tau-based therapies for Alzheimer’s disease requires an understanding of the timing of disease-related changes in tau. We quantified the phosphorylation state at multiple sites of the tau protein in cerebrospinal fluid markers across four decades of disease progression in dominantly inherited Alzheimer’s disease. We identified a pattern of tau staging where site-specific phosphorylation changes occur at different periods of disease progression and follow distinct trajectories over time. These tau phosphorylation state changes are uniquely associated with structural, metabolic, neurodegenerative and clinical markers of disease, and some (p-tau217 and p-tau181) begin with the initial increases in aggregate amyloid-β as early as two decades before the development of aggregated tau pathology. Others (p-tau205 and t-tau) increase with atrophy and hypometabolism closer to symptom onset. These findings provide insights into the pathways linking tau, amyloid-β and neurodegeneration, and may facilitate clinical trials of tau-based treatments.

Published
2020

3. Serum neurofilament dynamics predicts neurodegeneration and clinical progression in presymptomatic Alzheimer’s disease

Author

Preische, O., Schultz, S.A., Apel, A., Kuhle, J., Kaeser, S.A., Barro, C., Gräber, S., Kuder-Buletta, E., LaFougere, C., Laske, C., Vöglein, J., Levin, J., Masters, C.L., Martins, R., Schofield, P.R., Rossor, M.N., Graff-Radford, N.R., Salloway, S., Ghetti, B., Ringman, J.M., Noble, J.M., Chhatwal, J., Goate, A.M., Benzinger, T.L.S., Morris, J.C., Bateman, R.J., Wang, G., Fagan, A.M., McDade, E.M., Gordon, B.A., Jucker, M., Allegri, R., Amtashar, F., Bateman, R., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., D’Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Lee, J-H, Marcus, D., Mason, N.S., Masters, C., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Morris, J., Nagamatsu, A., Neimeyer, K., Noble, J., Norton, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., Xu, X., Preische, O., Schultz, S.A., Apel, A., Kuhle, J., Kaeser, S.A., Barro, C., Gräber, S., Kuder-Buletta, E., LaFougere, C., Laske, C., Vöglein, J., Levin, J., Masters, C.L., Martins, R., Schofield, P.R., Rossor, M.N., Graff-Radford, N.R., Salloway, S., Ghetti, B., Ringman, J.M., Noble, J.M., Chhatwal, J., Goate, A.M., Benzinger, T.L.S., Morris, J.C., Bateman, R.J., Wang, G., Fagan, A.M., McDade, E.M., Gordon, B.A., Jucker, M., Allegri, R., Amtashar, F., Bateman, R., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., Cruchaga, C., D’Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Goate, A., Goldman, J., Gordon, B., Graff-Radford, N., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Karch, C., Kasuga, K., Kawarabayashi, T., Klunk, W., Koeppe, R., Lee, J-H, Marcus, D., Mason, N.S., Masters, C., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Morris, J., Nagamatsu, A., Neimeyer, K., Noble, J., Norton, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., and Xu, X.

Abstract

Neurofilament light chain (NfL) is a promising fluid biomarker of disease progression for various cerebral proteopathies. Here we leverage the unique characteristics of the Dominantly Inherited Alzheimer Network and ultrasensitive immunoassay technology to demonstrate that NfL levels in the cerebrospinal fluid (n = 187) and serum (n = 405) are correlated with one another and are elevated at the presymptomatic stages of familial Alzheimer’s disease. Longitudinal, within-person analysis of serum NfL dynamics (n = 196) confirmed this elevation and further revealed that the rate of change of serum NfL could discriminate mutation carriers from non-mutation carriers almost a decade earlier than cross-sectional absolute NfL levels (that is, 16.2 versus 6.8 years before the estimated symptom onset). Serum NfL rate of change peaked in participants converting from the presymptomatic to the symptomatic stage and was associated with cortical thinning assessed by magnetic resonance imaging, but less so with amyloid-β deposition or glucose metabolism (assessed by positron emission tomography). Serum NfL was predictive for both the rate of cortical thinning and cognitive changes assessed by the Mini–Mental State Examination and Logical Memory test. Thus, NfL dynamics in serum predict disease progression and brain neurodegeneration at the early presymptomatic stages of familial Alzheimer’s disease, which supports its potential utility as a clinically useful biomarker.

Published
2019

4. An atlas of cortical circular RNA expression in Alzheimer disease brains demonstrates clinical and pathological associations

Author

Dube, U., Del-Aguila, J.L., Li, Z., Budde, J.P., Jiang, S., Hsu, S., Ibanez, L., Fernandez, M.V., Farias, F., Norton, J., Gentsch, J., Wang, F., Allegri, R., Amtashar, F., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., D'Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Kasuga, K., Kawarabayashi, T., Klunk, W., koeppe, R., Kuder-Buletta, E., Laske, C., Levin, J., Marcus, D., Martins, R., Mason, N.S., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., Xu, X., Dube, U., Del-Aguila, J.L., Li, Z., Budde, J.P., Jiang, S., Hsu, S., Ibanez, L., Fernandez, M.V., Farias, F., Norton, J., Gentsch, J., Wang, F., Allegri, R., Amtashar, F., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., D'Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Kasuga, K., Kawarabayashi, T., Klunk, W., koeppe, R., Kuder-Buletta, E., Laske, C., Levin, J., Marcus, D., Martins, R., Mason, N.S., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., and Xu, X.

Abstract

Parietal cortex RNA-sequencing (RNA-seq) data were generated from individuals with and without Alzheimer disease (AD; ncontrol = 13; nAD = 83) from the Knight Alzheimer Disease Research Center (Knight ADRC). Using this and an independent (Mount Sinai Brain Bank (MSBB)) AD RNA-seq dataset, cortical circular RNA (circRNA) expression was quantified in the context of AD. Significant associations were identified between circRNA expression and AD diagnosis, clinical dementia severity and neuropathological severity. It was demonstrated that most circRNA–AD associations are independent of changes in cognate linear messenger RNA expression or estimated brain cell-type proportions. Evidence was provided for circRNA expression changes occurring early in presymptomatic AD and in autosomal dominant AD. It was also observed that AD-associated circRNAs co-expressed with known AD genes. Finally, potential microRNA-binding sites were identified in AD-associated circRNAs for miRNAs predicted to target AD genes. Together, these results highlight the importance of analyzing non-linear RNAs and support future studies exploring the potential roles of circRNAs in AD pathogenesis.

Published
2019

5. An atlas of cortical circular RNA expression in Alzheimer disease brains demonstrates clinical and pathological associations

Author

Dube, U., Del-Aguila, J.L., Li, Z., Budde, J.P., Jiang, S., Hsu, S., Ibanez, L., Fernandez, M.V., Farias, F., Norton, J., Gentsch, J., Wang, F., Allegri, R., Amtashar, F., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., D'Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Kasuga, K., Kawarabayashi, T., Klunk, W., koeppe, R., Kuder-Buletta, E., Laske, C., Levin, J., Marcus, D., Martins, R., Mason, N.S., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., Xu, X., Dube, U., Del-Aguila, J.L., Li, Z., Budde, J.P., Jiang, S., Hsu, S., Ibanez, L., Fernandez, M.V., Farias, F., Norton, J., Gentsch, J., Wang, F., Allegri, R., Amtashar, F., Benzinger, T., Berman, S., Bodge, C., Brandon, S., Brooks, W., Buck, J., Buckles, V., Chea, S., Chrem, P., Chui, H., Cinco, J., Clifford, J., D'Mello, M., Donahue, T., Douglas, J., Edigo, N., Erekin-Taner, N., Fagan, A., Farlow, M., Farrar, A., Feldman, H., Flynn, G., Fox, N., Franklin, E., Fujii, H., Gant, C., Gardener, S., Ghetti, B., Goate, A., Goldman, J., Gordon, B., Gray, J., Gurney, J., Hassenstab, J., Hirohara, M., Holtzman, D., Hornbeck, R., Houeland DiBari, S., Ikeuchi, T., Ikonomovic, S., Jerome, G., Jucker, M., Kasuga, K., Kawarabayashi, T., Klunk, W., koeppe, R., Kuder-Buletta, E., Laske, C., Levin, J., Marcus, D., Martins, R., Mason, N.S., Maue-Dreyfus, D., McDade, E., Montoya, L., Mori, H., Nagamatsu, A., Neimeyer, K., Noble, J., Perrin, R., Raichle, M., Ringman, J., Roh, J-H, Schofield, P., Shimada, H., Shiroto, T., Shoji, M., Sigurdson, W., Sohrabi, H., Sparks, P., Suzuki, K., Swisher, L., Taddei, K., Wang, J., Wang, P., Weiner, M., Wolfsberger, M., Xiong, C., and Xu, X.

Abstract

Parietal cortex RNA-sequencing (RNA-seq) data were generated from individuals with and without Alzheimer disease (AD; ncontrol = 13; nAD = 83) from the Knight Alzheimer Disease Research Center (Knight ADRC). Using this and an independent (Mount Sinai Brain Bank (MSBB)) AD RNA-seq dataset, cortical circular RNA (circRNA) expression was quantified in the context of AD. Significant associations were identified between circRNA expression and AD diagnosis, clinical dementia severity and neuropathological severity. It was demonstrated that most circRNA–AD associations are independent of changes in cognate linear messenger RNA expression or estimated brain cell-type proportions. Evidence was provided for circRNA expression changes occurring early in presymptomatic AD and in autosomal dominant AD. It was also observed that AD-associated circRNAs co-expressed with known AD genes. Finally, potential microRNA-binding sites were identified in AD-associated circRNAs for miRNAs predicted to target AD genes. Together, these results highlight the importance of analyzing non-linear RNAs and support future studies exploring the potential roles of circRNAs in AD pathogenesis.

Published
2019

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