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September 26, 2017; 89 (13) Article

Sex differences in Alzheimer risk

Brain imaging of endocrine vs chronologic aging

Lisa Mosconi, Valentina Berti, Crystal Quinn, Pauline McHugh, Gabriella Petrongolo, Isabella Varsavsky, Ricardo S. Osorio, Alberto Pupi, Shankar Vallabhajosula, Richard S. Isaacson, Mony J. de Leon, Roberta Diaz Brinton
First published August 30, 2017, DOI: https://doi.org/10.1212/WNL.0000000000004425
Lisa Mosconi
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Valentina Berti
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Crystal Quinn
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Pauline McHugh
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Gabriella Petrongolo
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Isabella Varsavsky
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Ricardo S. Osorio
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Alberto Pupi
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Shankar Vallabhajosula
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Richard S. Isaacson
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Mony J. de Leon
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Roberta Diaz Brinton
From the Departments of Neurology (L.M., R.S.I.) and Radiology (S.V.), Weill Cornell Medical College; Department of Psychiatry (L.M., C.Q., P.M., G.P., I.V., R.S.O., M.J.d.L.), New York University School of Medicine, New York; Department of Biomedical, Experimental and Clinical Sciences “Mario Serio” (V.B., A.P.), Nuclear Medicine Unit, University of Florence, Italy; Departments of Pharmacology and Neurology (R.D.B.), College of Medicine, University of Arizona, Tucson; and Departments of Pharmacology, Biomedical Engineering, and Neurology (R.D.B.), University of South California, Los Angeles.
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Full PDF
Citation
Sex differences in Alzheimer risk
Brain imaging of endocrine vs chronologic aging
Lisa Mosconi, Valentina Berti, Crystal Quinn, Pauline McHugh, Gabriella Petrongolo, Isabella Varsavsky, Ricardo S. Osorio, Alberto Pupi, Shankar Vallabhajosula, Richard S. Isaacson, Mony J. de Leon, Roberta Diaz Brinton
Neurology Sep 2017, 89 (13) 1382-1390; DOI: 10.1212/WNL.0000000000004425

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Abstract

Objective: This observational multimodality brain imaging study investigates emergence of endophenotypes of late-onset Alzheimer disease (AD) risk during endocrine transition states in a cohort of clinically and cognitively normal women and age-matched men.

Methods: Forty-two 40- to 60-year-old cognitively normal women (15 asymptomatic perimenopausal by age [CNT], 13 perimenopausal [PERI], and 14 postmenopausal [MENO]) and 18 age- and education-matched men were examined. All patients had volumetric MRI, 18F-fluoro-2-deoxyglucose (FDG)–PET (glucose metabolism), and Pittsburgh compound B–PET scans (β-amyloid [Aβ] deposition, a hallmark of AD pathology).

Results: As expected, the MENO group was older than the PERI and CNT groups. Otherwise, groups were comparable on clinical and neuropsychological measures and APOE4 distribution. Compared to CNT women and to men, and controlling for age, PERI and MENO groups exhibited increased indicators of AD endophenotype, including hypometabolism, increased Aβ deposition, and reduced gray and white matter volumes in AD-vulnerable regions (p < 0.001). AD biomarker abnormalities were greatest in MENO, intermediate in PERI, and lowest in CNT women (p < 0.001). Aβ deposition was exacerbated in APOE4-positive MENO women relative to the other groups (p < 0.001).

Conclusions: Multimodality brain imaging indicates sex differences in development of the AD endophenotype, suggesting that the preclinical AD phase is early in the female aging process and coincides with the endocrine transition of perimenopause. These data indicate that the optimal window of opportunity for therapeutic intervention in women is early in the endocrine aging process.

GLOSSARY

Aβ=
β-amyloid;
AD=
Alzheimer disease;
CMRglc=
glucose metabolism;
CNT=
premenopausal women;
FDG=
18F-fluoro-2-deoxyglucose;
FWHM=
full width at half maximum;
GM=
gray matter;
GMV=
gray matter volumes;
HRT=
hormonal replacement therapy;
MENO=
postmenopausal women;
PCC=
posterior cingulate/precuneus;
PERI=
perimenopausal women;
PiB=
Pittsburgh compound B;
QUICKI=
quantitative insulin-sensitivity check index;
RR=
relative risk;
SPM=
statistical parametric mapping;
SUVR=
standardized uptake value ratio;
WM=
white matter;
WMV=
white matter volumes

Footnotes

  • Go to Neurology.org for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • Supplemental data at Neurology.org

  • Received April 26, 2017.
  • Accepted in final form July 5, 2017.
  • © 2017 American Academy of Neurology
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