Calcium Channel Blockade Ameliorates Endoplasmic Reticulum Stress in the Hippocampus Induced by Amyloidopathy in the Entorhinal Cortex

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Ghanbari Maman Azam; Ghasemian Roudsari Forouzan; Aliakbari Shayan; Gholami Pourbadie Hamid; KHODAGHOLI FARIBA; SHAERZADEH FATEMEH; Daftari Mahtab

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Journal: Iranian Journal of Pharmaceutical Research Year:2019 | Volume:18 | Issue:3 Page(s): 1466-1476

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Title

Calcium Channel Blockade Ameliorates Endoplasmic Reticulum Stress in the Hippocampus Induced by Amyloidopathy in the Entorhinal Cortex

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Keywords

Alzheimer disease

Entorhinal cortex

Endoplasmic reticulum stress

Calcium channel blockers

Protein disulfide-isomerases

Abstract

Entorhinal cortex (EC) is one of the first cerebral regions affected in Alzheimer’ s disease (AD). The pathology propagates to neighboring cerebral regions through a prion-like mechanism. In AD, intracellular calcium dyshomeostasis is associated with endoplasmic reticulum (ER) stress. This study was designed to examine hippocampal ER stress following EC amyloidopathy. Aβ 1-42 was bilaterally microinjected into the EC under stereotaxic surgery. Rats were daily treated with 30 μ g of isradipine, nimodipine, or placebo over one week. Passive avoidance and novel object recognition (NOR) tasks were performed using shuttle box and NOR test, respectively. GRP78/BiP and CHOP levels were measured in the hippocampal dentate gyrus (DG) by western blot technique. The glutathione (GSH) level and PDI activity were also assessed in the hippocampus by colorimetric spectrophotometer. Aβ treated group developed passive avoidance and novel recognition memory deficit compared to the control group. However, treatment with Calcium channel blockers reversed the impairment. BiP and CHOP level increased in the hippocampus following amyloidopathy in the EC. PDI activity and GSH level in the hippocampus decreased in the Aβ treated group, but Calcium channel blockers restored them toward the control level. In conclusion, memory impairment due to EC amyloidopathy is associated with ER stress related bio-molecular changes in the hippocampus, and treatment with L-type Calcium channel blockers may prevent the changes and ultimately improve cognitive performance.

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APA: Copy

Ghanbari Maman, Azam, Ghasemian Roudsari, Forouzan, Aliakbari, Shayan, Gholami Pourbadie, Hamid, KHODAGHOLI, FARIBA, Daftari, Mahtab. (2019). Calcium Channel Blockade Ameliorates Endoplasmic Reticulum Stress in the Hippocampus Induced by Amyloidopathy in the Entorhinal Cortex. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH (IJPR), 18(3), 1466-1476. SID. https://sid.ir/paper/289172/en

Vancouver: Copy

Ghanbari Maman Azam, Ghasemian Roudsari Forouzan, Aliakbari Shayan, Gholami Pourbadie Hamid, KHODAGHOLI FARIBA, Daftari Mahtab. Calcium Channel Blockade Ameliorates Endoplasmic Reticulum Stress in the Hippocampus Induced by Amyloidopathy in the Entorhinal Cortex. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH (IJPR)[Internet]. 2019;18(3):1466-1476. Available from: https://sid.ir/paper/289172/en

IEEE: Copy

Azam Ghanbari Maman, Forouzan Ghasemian Roudsari, Shayan Aliakbari, Hamid Gholami Pourbadie, FARIBA KHODAGHOLI, Mahtab Daftari, “Calcium Channel Blockade Ameliorates Endoplasmic Reticulum Stress in the Hippocampus Induced by Amyloidopathy in the Entorhinal Cortex,” IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH (IJPR), vol. 18, no. 3, pp. 1466–1476, 2019, [Online]. Available: https://sid.ir/paper/289172/en

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