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1. Impact fact(or) fiction?

Author

Spires-Jones, Tara L, Belin, David, Spires-Jones, Tara L [0000-0003-2530-0598], Belin, David [0000-0002-7383-372X], and Apollo - University of Cambridge Repository

Subjects
52 Psychology, 5202 Biological Psychology, 3209 Neurosciences, 32 Biomedical and Clinical Sciences, 3202 Clinical Sciences
Published
2023
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2. The Effect of Interventions to Prevent Type 2 Diabetes on the Development of Diabetic Retinopathy: The DPP/DPPOS Experience

Author

White, Neil H., Pan, Qing, Knowler, William C., Schroeder, Emily B., Dabelea, Dana, Chew, Emily Y., Blodi, Barbara, Goldberg, Ronald B., Pi-Sunyer, Xavier, Darwin, Christine, Schlögl, Mathias, Nathan, David M., Goldstein, Barry J., Furlong, Kevin, Smith, Kellie A., Mendoza, Jewel, Wildman, Wendi, Simmons, Marsha, Jensen, Genine, Liberoni, Renee, Spandorfer, John, Pepe, Constance, Donahue, Richard P., Prineas, Ronald, Rowe, Patricia, Giannella, Anna, Calles, Jeanette, Sanguily, Juliet, Cassanova-Romero, Paul, Castillo-Florez, Sumaya, Florez, Hermes J., Garg, Rajesh, Kirby, Lascelles, Lara, Olga, Larreal, Carmen, McLymont, Valerie, Mendez, Jadell, Perry, Arlette, Saab, Patrice, Veciana, Bertha, Haffner, Steven M., Hazuda, Helen P., Montez, Maria G., Isaac, Juan, Hattaway, Kathy, Lorenzo, Carlos, Martinez, Arlene, Salazar, Monica, Walker, Tatiana, Hamman, Richard F., Nash, Patricia V., Steinke, Sheila C., Testaverde, Lisa, Truong, Jennifer, Anderson, Denise R., Ballonoff, Larry B., Bouffard, Alexis, Boxer, Rebecca S., Bucca, Brian, Calonge, B. Ned, Delve, Lynne, Farago, Martha, Hill, James O., Hoyer, Shelley R., Jenkins, Tonya, Jortberg, Bonnie T., Lenz, Dione, Miller, Marsha, Nilan, Thomas, Perreault, Leigh, Price, David W., Regensteiner, Judith G., Seagle, Helen, Smith, Carissa M., VanDorsten, Brent, Horton, Edward S., Munshi, Medha, Lawton, Kathleen E., Poirier, Catherine S., Swift, Kati, Jackson, Sharon D., Arky, Ronald A., Bryant, Marybeth, Burke, Jacqueline P., Caballero, Enrique, Callaphan, Karen M., Fargnoli, Barbara, Franklin, Therese, Ganda, Om P., Guidi, Ashley, Guido, Mathew, Jacobsen, Alan M., Kula, Lyn M., Kocal, Margaret, Lambert, Lori, Ledbury, Sarah, Malloy, Maureen A., Middelbeek, Roeland J.W., Nicosia, Maryanne, Oldmixon, Cathryn F., Pan, Jocelyn, Quitingon, Marizel, Rainville, Riley, Rubtchinsky, Stacy, Seely, Ellen W., Sansoucy, Jessica, Schweizer, Dana, Simonson, Donald, Smith, Fannie, Solomon, Caren G., Spellman, Jeanne, Warram, James, Kahn, Steven E., Montgomery, Brenda K., Fattaleh, Basma, Colegrove, Celeste, Fujimoto, Wilfred, Knopp, Robert H., Lipkin, Edward W., Marr, Michelle, Morgan-Taggart, Ivy, Murillo, Anne, O’Neal, Kayla, Trence, Dace, Taylor, Lonnese, Thomas, April, Tsai, Elaine C., Kitabchi, Abbas E., Dagogo-Jack, Samuel, Murphy, Mary E., Taylor, Laura, Dolgoff, Jennifer, Hampton, Ethel Faye, Applegate, William B., Bryer-Ash, Michael, Clark, Debra, Frieson, Sandra L., Ibebuogu, Uzoma, Imseis, Raed, Lambeth, Helen, Lichtermann, Lynne C., Oktaei, Hooman, Ricks, Harriet, Rutledge, Lily M.K., Sherman, Amy R., Smith, Clara M., Soberman, Judith E., Williamsleaves, Beverly, Patel, Avnisha, Nyenwe, Ebenezer A., Metzger, Boyd E., Molitch, Mark E., Wallia, Amisha, Johnson, Mariana K., VanderMolen, Sarah, Adelman, Daphne T., Behrends, Catherine, Cook, Michelle, Fitzgibbon, Marian, Giles, Mimi M., Hartmuller, Monica, Johnson, Cheryl K.H., Larsen, Diane, Lowe, Anne, Lyman, Megan, McPherson, David, Penn, Samsam C., Pitts, Thomas, Reinhart, Renee, Roston, Susan, Schinleber, Pamela A., McKitrick, Charles, Turgeon, Heather, Larkin, Mary, Mugford, Marielle, Thangthaeng, Nopporn, Leander, Fernelle, Abbott, Kathy, Anderson, Ellen, Bissett, Laurie, Bondi, Kristy, Cagliero, Enrico, Florez, Jose C., Delahanty, Linda, Goldman, Valerie, Grassa, Elaine, Gurry, Lindsey, D’Anna, Kali, Leandre, Fernelle, Lou, Peter, Poulos, Alexandra, Raymond, Elyse, Ripley, Valerie, Stevens, Christine, Tseng, Beverly, Olefsky, Jerrold M., Barrettonnor, Elizabeth, Mudaliar, Sunder, Rosario Araneta, Maria, Carrion-Petersen, Mary Lou, Vejvoda, Karen, Bassiouni, Sarah, Beltran, Madeline, Claravall, Lauren N., Dowden, Jonalle M., Edelman, Steven V., Garimella, Pranav, Henry, Robert R., Horne, Javiva, Lamkin, Marycie, Szerdi Janesch, Simona, Leos, Diana, Polonsky, William, Ruiz, Rosa, Smith, Jean, Torio-Hurley, Jennifer, Pi-Sunyer, F. Xavier, Laferrere, Blandine, Lee, Jane E., Hagamen, Susan, Kelly-Dinham, Kim, Allison, David B., Agharanya, Nnenna, Aronoff, Nancy J., Baldo, Maria, Crandall, Jill P., Foo, Sandra T., Luchsinger, Jose A., Pal, Carmen, Parkes, Kathy, Pena, Mary Beth, Roman, Julie, Rooney, Ellen S., VanWye, Gretchen E.H., Viscovich, Kristine A., Prince, Melvin J., Marrero, David G., Mather, Kieren J., De Groot, Mary, Kelly, Susie M., Jackson, Marcia A., McAtee, Gina, Putenney, Paula, Ackermann, Ronald T., Cantrell, Carolyn M., Dotson, Yolanda F., Fineberg, Edwin S., Fultz, Megan, Guare, John C., Hadden, Angela, Ignaut, James M., Kirkman, Marion S., O’Kelly Phillips, Erin, Pinner, Kisha L., Porter, Beverly D., Roach, Paris J., Rowland, Nancy D., Wheeler, Madelyn L., Ratner, Robert E., Aroda, Vanita, Magee, Michelle, Youssef, Gretchen, Shapiro, Sue, Andon, Natalie, Bavido-Arrage, Catherine, Boggs, Geraldine, Bronsord, Marjorie, Brown, Ernestine, Love Burkott, Holly, Cheatham, Wayman W., Cola, Susan, Evans, Cindy, Gibbs, Peggy, Kellum, Tracy, Leon, Lilia, Lagarda, Milvia, Levatan, Claresa, Lindsay, Milajurine, Nair, Asha K., Park, Jean, Passaro, Maureen, Silverman, Angela, Uwaifo, Gabriel, Wells-Thayer, Debra, Wiggins, Renee, Saad, Mohammed F., Watson, Karol, Budget, Maria, Jinagouda, Sujata, Botrous, Medhat, Sosa, Anthony, Tadros, Sameh, Akbar, Khan, Conzues, Claudia, Magpuri, Perpetua, Ngo, Kathy, Rassam, Amer, Waters, Debra, Xapthalamous, Kathy, Santiago, Julio V., Brown, Angela L., Santiago, Ana, Das, Samia, Khare-Ranade, Prajakta, Stich, Tamara, Fisher, Edwin, Hurt, Emma, Jones, Jackie, Jones, Tracy, Kerr, Michelle, McCowan, Sherri, Ryder, Lucy, Wernimont, Cormarie, Saudek, Christopher D., Hill Golden, Sherita, Bradley, Vanessa, Sullivan, Emily, Whittington, Tracy, Abbas, Caroline, Allen, Adrienne, Brancati, Frederick L., Cappelli, Sharon, Clark, Jeanne M., Charleston, Jeanne B., Freel, Janice, Horak, Katherine, Greene, Alicia, Jiggetts, Dawn, Johnson, Delois, Joseph, Hope, Kalyani, Rita, Loman, Kimberly, Mathioudakis, Nestoras, Maruthur, Nisa, Mosley, Henry, Reusing, John, Rubin, Richard R., Samuels, Alafia, Shields, Thomas, Stephens, Shawne, Stewart, Kerry J., Thomas, LeeLana, Utsey, Evonne, Williamson, Paula, Schade, David S., Adams, Karwyn S., Johannes, Carolyn, Hemphill, Claire, Hyde, Penny, Canady, Janene L., Atler, Leslie F., Boyle, Patrick J., Burge, Mark R., Chai, Lisa, Colleran, Kathleen, Fondino, Ateka, Gonzales, Ysela, Hernandez-McGinnis, Doris A., Katz, Patricia, King, Carolyn, Middendorf, Julia, Rubinchik, Sofya, Senter, Willette, Shamoon, Harry, Crandall, Jill, Brown, Janet O., Trandafirescu, Gilda, Powell, Danielle, Adorno, Elsie, Cox, Liane, Duffy, Helena, Engel, Samuel, Friedler, Allison, Goldstein, Angela, Howardentury, Crystal J., Lukin, Jennifer, Kloiber, Stacey, Longchamp, Nadege, Martinez, Helen, Pompi, Dorothy, Scheindlin, Jonathan, Tomuta, Norica, Violino, Elissa, Walker, Elizabeth A., Wylie-Rosett, Judith, Zimmerman, Elise, Zonszein, Joel, Wing, Rena R., Orchard, Trevor, Venditti, Elizabeth, Koenning, Gaye, Kramer, M. Kaye, Smith, Marie, Jeffries, Susan, Weinzierl, Valarie, Barr, Susan, Benchoff, Catherine, Boraz, Miriam, Clifford, Lisa, Culyba, Rebecca, Frazier, Marlene, Gilligan, Ryan, Guimond, Stephanie, Harrier, Susan, Harris, Louann, Kriska, Andrea, Manjoo, Qurashia, Mullen, Monica, Noel, Alicia, Otto, Amy, Pettigrew, Jessica, Rockette-Wagner, Bonny, Rubinstein, Debra, Semler, Linda, Smith, Cheryl F., Williams, Katherine V., Wilson, Tara, Arakaki, Richard F., Mau, Marjorie K., Latimer, Renee W., Isonaga, Mae K., Baker-Ladao, Narleen K., Bow, Ralph, Bermudez, Nina E., Dias, Lorna, Inouye, Jillian, Melish, John S., Mikami, Kathy, Mohideen, Pharis, Odom, Sharon K., Perry, Raynette U., Yamamoto, Robin E., Hanson, Robert L., Shah, Vallabh, Hoskin, Mary A., Percy, Carol A., Cooeyate, Norman, Natewa, Camille, Dodge, Charlotte, Enote, Alvera, Anderson, Harelda, Acton, Kelly J., Andre, Vickie L., Barber, Rosalyn, Begay, Shandiin, Bennett, Peter H., Benson, Mary Beth, Bird, Evelyn C., Broussard, Brenda A., Bucca, Brian C., Chavez, Marcella, Cook, Sherron, Curtis, Jeff, Dacawyma, Tara, Doughty, Matthew S., Duncan, Roberta, Edgerton, Cyndy, Ghahate, Jacqueline M., Glass, Justin, Glass, Martia, Gohdes, Dorothy, Grant, Wendy, Horse, Ellie, Ingraham, Louise E., Jackson, Merry, Jay, Priscilla, Kaskalla, Roylen S., Kavena, Karen, Kessler, David, Kobus, Kathleen M., Krakoff, Jonathan, Kurland, Jason, Manus, Catherine, McCabe, Cherie, Michaels, Sara, Morgan, Tina, Nashboo, Yolanda, Nelson, Julie A., Poirier, Steven, Polczynski, Evette, Piromalli, Christopher, Reidy, Mike, Roumain, Jeanine, Rowse, Debra, Roy, Robert J., Sangster, Sandra, Sewenemewa, Janet, Smart, Miranda, Spencer, Chelsea, Tonemah, Darryl, Williams, Rachel, Wilson, Charlton, Yazzie, Michelle, Bain, Raymond, Fowler, Sarah, Larsen, Michael D., Jablonski, Kathleen, Temprosa, Marinella, Brenneman, Tina, Edelstein, Sharon L., Abebe, Solome, Bamdad, Julie, Barkalow, Melanie, Bethepu, Joel, Bezabeh, Tsedenia, Bowers, Anna, Butler, Nicole, Callaghan, Jackie, Carter, Caitlin E., Christophi, Costas, Dwyer, Gregory M., Foulkes, Mary, Gao, Yuping, Gooding, Robert, Gottlieb, Adrienne, Grimes, Kristina L., Grover-Fairchild, Nisha, Haffner, Lori, Hoffman, Heather, Jones, Steve, Jones, Tara L., Katz, Richard, Kolinjivadi, Preethy, Lachin, John M., Ma, Yong, Mucik, Pamela, Orlosky, Robert, Reamer, Susan, Rochon, James, Sapozhnikova, Alla, Sherif, Hanna, Stimpson, Charlotte, Hogan Tjaden, Ashley, Walker-Murray, Fredricka, Venditti, Elizabeth M., Kriska, Andrea M., Weinzierl, Valerie, Marcovina, Santica, Aldrich, F. Alan, Harting, Jessica, Albers, John, Strylewicz, Greg, Killeen, Anthony, Gabrielson, Deanna, Eastman, R., Fradkin, Judith, Garfield, Sanford, Lee, Christine, Gregg, Edward, Zhang, Ping, O’Leary, Dan, Evans, Gregory, Budoff, Matthew, Dailing, Chris, Stamm, Elizabeth, Schwartz, Ann, Navy, Caroline, Palermo, Lisa, Rautaharju, Pentti, Prineas, Ronald J., Soliman, Elsayed Z., Alexander, Teresa, Campbell, Charles, Hall, Sharon, Li, Yabing, Mills, Margaret, Pemberton, Nancy, Rautaharju, Farida, Zhang, Zhuming, Hu, Julie, Hensley, Susan, Keasler, Lisa, Taylor, Tonya, Danis, Ronald, Davis, Matthew, Hubbard, Larry, Endres, Ryan, Elsas, Deborah, Johnson, Samantha, Myers, Dawn, Barrett, Nancy, Baumhauer, Heather, Benz, Wendy, Cohn, Holly, Corkery, Ellie, Dohm, Kristi, Domalpally, Amitha, Gama, Vonnie, Goulding, Anne, Ewen, Andy, Hurtenbach, Cynthia, Lawrence, Daniel, McDaniel, Kyle, Pak, Jeong, Reimers, James, Shaw, Ruth, Swift, Maria, Vargo, Pamela, Watson, Sheila, Manly, Jennifer, Mayer-Davis, Elizabeth, Moran, Robert R., Ganiats, Ted, David, Kristin, Sarkin, Andrew J., Groessl, Erik, Katzir, Naomi, Chong, Helen, Herman, William H., Brändle, Michael, Brown, Morton B., Altshuler, David, Billings, Liana K., Chen, Ling, Harden, Maegan, Pollin, Toni I., Shuldiner, Alan R., Franks, Paul W., and Hivert, Marie-France

Subjects
Advanced and Specialized Nursing, Endocrinology, Diabetes and Metabolism, Internal Medicine, Pathophysiology/Complications
Abstract

OBJECTIVE To determine whether interventions that slow or prevent the development of type 2 diabetes in those at risk reduce the subsequent prevalence of diabetic retinopathy. RESEARCH DESIGN AND METHODS The Diabetes Prevention Program (DPP) randomized subjects at risk for developing type 2 diabetes because of overweight/obesity and dysglycemia to metformin (MET), intensive lifestyle intervention (ILS), or placebo (PLB) to assess the prevention of diabetes. During the DPP and DPP Outcome Study (DPPOS), we performed fundus photography over time on study participants, regardless of their diabetes status. Fundus photographs were graded using the Early Treatment Diabetic Retinopathy Study grading system, with diabetic retinopathy defined as typical lesions of diabetic retinopathy (microaneurysms, exudates, or hemorrhage, or worse) in either eye. RESULTS Despite reduced progression to diabetes in the ILS and MET groups compared with PLB, there was no difference in the prevalence of diabetic retinopathy between treatment groups after 1, 5, 11, or 16 years of follow-up. No treatment group differences in retinopathy were found within prespecified subgroups (baseline age, sex, race/ethnicity, baseline BMI). In addition, there was no difference in the prevalence of diabetic retinopathy between those exposed to metformin and those not exposed to metformin, regardless of treatment group assignment. CONCLUSIONS Interventions that delay or prevent the onset of type 2 diabetes in overweight/obese subjects with dysglycemia who are at risk for diabetes do not reduce the development of diabetic retinopathy for up to 20 years.

Published
2022
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3. The physiological roles of tau and Aβ: implications for Alzheimer’s disease pathology and therapeutics

Author

Kent, Sarah A., Spires-Jones, Tara L., and Durrant, Claire S.

Subjects
Pathology, medicine.medical_specialty, Amyloid beta, Angiogenesis, tau Proteins, Review, Therapeutics, Microtubule dynamics, Disease, Pathology and Forensic Medicine, law.invention, Synapse, Myelination, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Memory, Alzheimer Disease, Microtubule, law, Animals, Humans, Medicine, 030304 developmental biology, 0303 health sciences, Amyloid beta-Peptides, biology, business.industry, Neurogenesis, biology.protein, Axoplasmic transport, Vasculature, Suppressor, Neurology (clinical), business, 030217 neurology & neurosurgery
Abstract

Tau and amyloid beta (Aβ) are the prime suspects for driving pathology in Alzheimer’s disease (AD) and, as such, have become the focus of therapeutic development. Recent research, however, shows that these proteins have been highly conserved throughout evolution and may have crucial, physiological roles. Such functions may be lost during AD progression or be unintentionally disrupted by tau- or Aβ-targeting therapies. Tau has been revealed to be more than a simple stabiliser of microtubules, reported to play a role in a range of biological processes including myelination, glucose metabolism, axonal transport, microtubule dynamics, iron homeostasis, neurogenesis, motor function, learning and memory, neuronal excitability, and DNA protection. Aβ is similarly multifunctional, and is proposed to regulate learning and memory, angiogenesis, neurogenesis, repair leaks in the blood–brain barrier, promote recovery from injury, and act as an antimicrobial peptide and tumour suppressor. This review will discuss potential physiological roles of tau and Aβ, highlighting how changes to these functions may contribute to pathology, as well as the implications for therapeutic development. We propose that a balanced consideration of both the physiological and pathological roles of tau and Aβ will be essential for the design of safe and effective therapeutics.

Published
2020
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4. Author response for 'A comparison of blood and brain-derived ageing and inflammation-related DNA methylation signatures and their association with microglial burdens'

Author

null Stevenson, Anna J., null McCartney, Daniel L., null Gadd, Danni A., null Shireby, Gemma, null Hillary, Robert F., null King, Declan, null Tzioras, Makis, null Wrobel, Nicola, null McCafferty, Sarah, null Murphy, Lee, null McColl, Barry W., null Redmond, Paul, null Taylor, Adele M., null Harris, Sarah E., null Russ, Tom C., null McIntosh, Andrew M., null Mill, Jonathan, null Smith, Colin, null Deary, Ian J., null Cox, Simon R., null Marioni, Riccardo E., and null Spires-Jones, Tara L.

Published
2022
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5. Additional file 5 of Synaptic proteomics reveal distinct molecular signatures of cognitive change and C9ORF72 repeat expansion in the human ALS cortex

Author

Laszlo, Zsofia I., Hindley, Nicole, Sanchez Avila, Anna, Kline, Rachel A., Eaton, Samantha L., Lamont, Douglas J., Smith, Colin, Spires-Jones, Tara L., Wishart, Thomas M., and Henstridge, Christopher M.

Abstract

Additional file 5. Appendix 1, example images from whole western blots used in this manuscript

Published
2022
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6. sj-pdf-1-bna-10.1177_23982128221086464 ��� Supplemental material for Reducing voltage-dependent potassium channel Kv3.4 levels ameliorates synapse loss in a mouse model of Alzheimer���s disease

Author

Yeap, Jie, Sathyaprakash, Chaitra, Toombs, Jamie, Tulloch, Jane, Scutariu, Cristina, Rose, Jamie, Burr, Karen, Davies, Caitlin, Colom-Cadena, Marti, Chandran, Siddharthan, Large, Charles H., Rowan, Matthew J. M., Gunthorpe, Martin J., and Spires-Jones, Tara L.

Subjects
FOS: Clinical medicine, 110904 Neurology and Neuromuscular Diseases, Neuroscience
Abstract

Supplemental material, sj-pdf-1-bna-10.1177_23982128221086464 for Reducing voltage-dependent potassium channel Kv3.4 levels ameliorates synapse loss in a mouse model of Alzheimer���s disease by Jie Yeap, Chaitra Sathyaprakash, Jamie Toombs, Jane Tulloch, Cristina Scutariu, Jamie Rose, Karen Burr, Caitlin Davies, Marti Colom-Cadena, Siddharthan Chandran, Charles H. Large, Matthew J. M. Rowan, Martin J. Gunthorpe and Tara L. Spires-Jones in Brain and Neuroscience Advances

Published
2022
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8. Additional file 1 of Characterisation of an inflammation-related epigenetic score and its association with cognitive ability

Author

Stevenson, Anna J., McCartney, Daniel L., Hillary, Robert F., Campbell, Archie, Morris, Stewart W., Mairead L. Bermingham, Walker, Rosie M., Evans, Kathryn L., Boutin, Thibaud S., Hayward, Caroline, McRae, Allan F., McColl, Barry W., Spires-Jones, Tara L., McIntosh, Andrew M., Deary, Ian J., and Marioni, Riccardo E.

Abstract

Additional file 1. Supplementary methods.

Published
2020
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10. Additional file 3 of Characterisation of an inflammation-related epigenetic score and its association with cognitive ability

Author

Stevenson, Anna J., McCartney, Daniel L., Hillary, Robert F., Campbell, Archie, Morris, Stewart W., Mairead L. Bermingham, Walker, Rosie M., Evans, Kathryn L., Boutin, Thibaud S., Hayward, Caroline, McRae, Allan F., McColl, Barry W., Spires-Jones, Tara L., McIntosh, Andrew M., Deary, Ian J., and Marioni, Riccardo E.

Subjects
education
Abstract

Additional file 3. Figure S1. Pearson correlations between serum CRP, the DNAm CRP score and the genetic score. Figure S2. Correlations between individual CpGs comprising the DNAm CRP score and serum CRP in the Lothian Birth Cohort 1936 and Generation Scotland. Figure S3. Inter-wave Pearson correlations DNAm CRP score and serum CRP in Lothian Birth Cohort 1936.

Published
2020
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11. Alzheimer's Therapeutics Targeting Amyloid Beta 1–42 Oligomers II: Sigma-2/PGRMC1 Receptors Mediate Abeta 42 Oligomer Binding and Synaptotoxicity

Author

Izzo, Nicholas J., Xu, Jinbin, Zeng, Chenbo, Kirk, Molly J., Mozzoni, Kelsie, Silky, Colleen, Rehak, Courtney, Yurko, Raymond, Look, Gary, Rishton, Gilbert, Safferstein, Hank, Cruchaga, Carlos, Goate, Alison, Cahill, Michael A., Arancio, Ottavio, Mach, Robert H., Craven, Rolf, Head, Elizabeth, LeVine III, Harry, Spires-Jones, Tara L., and Catalano, Susan M.

Subjects
Oligomers, FOS: Clinical medicine, Neurosciences, Therapeutics, Alzheimer's disease, Cytology, Medical sciences, 3. Good health
Abstract

Amyloid beta (Abeta) 1–42 oligomers accumulate in brains of patients with Mild Cognitive Impairment (MCI) and disrupt synaptic plasticity processes that underlie memory formation. Synaptic binding of Abeta oligomers to several putative receptor proteins is reported to inhibit long-term potentiation, affect membrane trafficking and induce reversible spine loss in neurons, leading to impaired cognitive performance and ultimately to anterograde amnesia in the early stages of Alzheimer's disease (AD). We have identified a receptor not previously associated with AD that mediates the binding of Abeta oligomers to neurons, and describe novel therapeutic antagonists of this receptor capable of blocking Abeta toxic effects on synapses in vitro and cognitive deficits in vivo. Knockdown of sigma-2/PGRMC1 (progesterone receptor membrane component 1) protein expression in vitro using siRNA results in a highly correlated reduction in binding of exogenous Abeta oligomers to neurons of more than 90%. Expression of sigma-2/PGRMC1 is upregulated in vitro by treatment with Abeta oligomers, and is dysregulated in Alzheimer's disease patients' brain compared to age-matched, normal individuals. Specific, high affinity small molecule receptor antagonists and antibodies raised against specific regions on this receptor can displace synthetic Abeta oligomer binding to synaptic puncta in vitro and displace endogenous human AD patient oligomers from brain tissue sections in a dose-dependent manner. These receptor antagonists prevent and reverse the effects of Abeta oligomers on membrane trafficking and synapse loss in vitro and cognitive deficits in AD mouse models. These findings suggest sigma-2/PGRMC1 receptors mediate saturable oligomer binding to synaptic puncta on neurons and that brain penetrant, small molecules can displace endogenous and synthetic oligomers and improve cognitive deficits in AD models. We propose that sigma-2/PGRMC1 is a key mediator of the pathological effects of Abeta oligomers in AD and is a tractable target for small molecule disease-modifying therapeutics.

12. Human tau increases amyloid β plaque size but not amyloid β‐mediated synapse loss in a novel mouse model of Alzheimer's disease

Author

Jackson, Rosemary J., Rudinskiy, Nikita, Herrmann, Abigail G., Croft, Shaun, Kim, Jeesoo Monica, Veselina Petrova, Ramos‐rodriguez, Juan Jose, Pitstick, Rose, Wegmann, Susanne, Garcia‐alloza, Monica, Carlson, George A., Hyman, Bradley T., and Spires‐jones, Tara L.

Subjects
mental disorders
Abstract

Alzheimer's disease is characterized by the presence of aggregates of amyloid beta (Aβ) in senile plaques and tau in neurofibrillary tangles, as well as marked neuron and synapse loss. Of these pathological changes, synapse loss correlates most strongly with cognitive decline. Synapse loss occurs prominently around plaques due to accumulations of oligomeric Aβ. Recent evidence suggests that tau may also play a role in synapse loss but the interactions of Aβ and tau in synapse loss remain to be determined. In this study, we generated a novel transgenic mouse line, the APP/PS1/rTg21221 line, by crossing APP/PS1 mice, which develop Aβ-plaques and synapse loss, with rTg21221 mice, which overexpress wild-type human tau. When compared to the APP/PS1 mice without human tau, the cross-sectional area of ThioS+ dense core plaques was increased by ~50%. Along with increased plaque size, we observed an increase in plaque-associated dystrophic neurites containing misfolded tau, but there was no exacerbation of neurite curvature or local neuron loss around plaques. Array tomography analysis similarly revealed no worsening of synapse loss around plaques, and no change in the accumulation of Aβ at synapses. Together, these results indicate that adding human wild-type tau exacerbates plaque pathology and neurite deformation but does not exacerbate plaque-associated synapse loss. This article is protected by copyright. All rights reserved.

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