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Curcumin-loaded PLGA Nanoparticles Improve Cognition and Neurogenesis in Alzheimer’s

# Curcumin-loaded PLGA Nanoparticles Improve Cognition and Neurogenesis in Alzheimer’s Around 1.5 billion of the world’s population are being affected by neurodegenerative disorders.[12] Neuroinflammation is the principal contributor to neurodegeneration by breaking down the selectivity of the blood-brain barrier (BBB), causing morphological changes due to tissue damage by the infiltrating leukocytes.[12] Leukocytes are the so-called […]

Curcumin-loaded PLGA Nanoparticles Improve Cognition and Neurogenesis in Alzheimer’s

Around 1.5 billion of the world’s population are being affected by neurodegenerative disorders.[12] Neuroinflammation is the principal contributor to neurodegeneration by breaking down the selectivity of the blood-brain barrier (BBB), causing morphological changes due to tissue damage by the infiltrating leukocytes.[12] Leukocytes are the so-called white blood cells produced by the body for protection against diseases.[2,12] However, the abnormal accumulation of misfolding proteins like the amyloid beta in the case of Alzheimer’s disease (AD) activates the neuroinflammation response, participating in several cells from the immune system, including the infiltrating leukocytes.2,12] The BBB generally restricts normal leukocytes. However, several investigations have shown that many neurodegenerative disorders cause the infiltration of white blood cells in the brain.[1]

On the other hand, some articles demonstrated that the overexpression of some inflammatory mediators in the brain (IL-1B, IL-6, IL-23, TNF-alpha) is responsible for neuronal death and damage.[12] For combating neuroinflammation, the body has a mechanism called “heat shock response,” which helps in giving neuroprotection against inflammation, high temperature, and infections, among other stressors.[12] In general, the genes that encode the heat shock response are called vitagenes.[12] Vitagenes helps in the assembly of antioxidant and the initiation of cell pro-survival pathways.[3,12] Recent studies have identified the expression of the vitagenes for combating the toxicity caused by the abnormal aggregation of proteins like the amyloid beta or the tau protein in AD models.[1,3,6,12]

The complexity behind AD lies in several outcomes mainly caused by the increased levels of misfolding proteins. Usually, AD models present some pathological features like poor homeostasis capacity, high neuron mortality, abnormal oxidative stress, neuroinflammation, and dysfunction of the CNS.[4] Different investigations have shown that these pathological features affect the integrity of the proteins that compose the brain, including the vitagenes, thus impacting the lifespan, aging regulation, and health of the individual.[5,7] Several in vivo studies suggest that polyphenols increase the activity of the heat shock response, principally by stimulating the heat shock protein called (Hsp) and other proteins from the (Hsp) family.[8,9,12] Boosting the Hsp family is crucial in combating the pathological features of AD.[12] Recently, investigators suggested the use of hydrophobic polyphenol curcumin for treating AD and other neurodegenerative disorders since this molecule has pharmacological properties.[1-5] Curcumin can decrease neuroinflammation, anticancer, antioxidant, anti-diabetic, increase neuroprotection and anti-amyloid characteristics.10,11,13] The curcumin reduces neuroinflammation by downregulating several cytokines.[3,8,13]

However, some articles suggest that curcumin has low bioavailability and drug delivery. [3,5] To overcome this limitation, some investigators propose using a nano-based curcumin delivery system called PLGA-based curcumin( see Fig. 1). [5,6,9] Curcumin-loaded PLGA nanoparticles have been shown to have enhanced bioavailability and improved drug delivery to the brain, making them a promising strategy for treating neurodegenerative disorders such as AD. [8,13] Recent studies have shown that curcumin-loaded PLGA nanoparticles have the potential to inhibit the formation of the amyloid beta and the tau proteins in the brain, which are hallmarks of AD.[1,10] This new therapy also helps reduce oxidative stress and neuroinflammation, which contribute to neurodegeneration.[1-7] Several articles suggest that this therapy can improve memory and cognitive function in different AD models.[12] PLGA-based curcumin also promotes the proliferation, neuronal differentiation, and self-renewal of nervous system cells, helping repair the damage caused by neurodegeneration ( see Fig.3).[11]

Nano-based curcumin delivery system for targeted delivery and improvement of water solubility and bioavailability of curcumin. [12]

Figure 1.

The PLGA-based curcumin treatment for AD uses nanoparticles to transport curcumin to the brain. [1-3] The nanoparticles comprise PLGA, a biocompatible and biodegradable polymer.[5] The nanoparticles are small enough to cross the BBB, which is typically challenging for medications targeting the brain.[5] Once the nanoparticles reach the brain, they release curcumin, reducing neuroinflammation, inhibiting the aggregation of misfolding proteins, and improving neuroprotection and cognition.[1-5] In other words, by decreasing neuroinflammation and inhibiting the development of abnormal proteins, PLGA-based curcumin remedy can slow down or even reverse the advancement of AD.[5-9 Several articles have shown that the PLGA-based curcumin treatment can help in combating other neurodegenerative disorders like Parkinson’s disease (PD) by reducing PD symptoms, apoptosis, and oxidative stress.[12] The PLGA-based curcumin therapy could provide a wide range of benefits in AD patients by decreasing the progression of most of the pathological aspects of the disorder.[5-10] In addition, this therapy overcomes one of the most challenging aspects of AD treatment, which is to cross the BBB.[1] PLGA-based curcumin provides a safe, viable, stable, nontoxic, and efficient way to fight AD progression.[11] Clinical trials for PLGA-based curcumin are ongoing, aiming to study the effectiveness and safety of using this treatment on humans.[10-13] Even though the results are unavailable, the preclinical studies show remarkable results in mice models.[12]

Benefit summary of the nano-based curcumin delivery system (PLGA-based curcumin)

  • Decrease Amyloid beta and tau misfolding, accumulation, and toxicity.
  • Improves memory and cognition in AD models ( see Fig. 2).
  • High circulation time in blood and bioavailability
  • Cross the Blood-brain barrier
  • Decreases neuronal cell death.
  • Reduces neuroinflammation dramatically.
  • Enhances neuroprotection and neuroplasticity.
  • Inhibit the activation of cytokines.
  • Promotes the heat shock response.
  • Reduces the immune cell infiltration.

Curcumin-loaded nanoparticles significantly reversed the Aβ-induced deficits in learning and memory compared to control rats. [11]

Figure 2.

References

  1. [Barbara, R., Belletti, D., Pederzoli, F., Masoni, M., Keller, J., Ballestrazzi, A., ... & Grabrucker, A. M. (2017). Novel Curcumin loaded nanoparticles engineered for Blood-Brain Barrier crossing and able to disrupt Abeta aggregates. _International journal of pharmaceutics_, _526_(1-2), 413-424.](https://pubmed.ncbi.nlm.nih.gov/28495580/ "Novel Curcumin loaded nanoparticles engineered for Blood-Brain Barrier crossing and able to disrupt Abeta aggregates")
  2. [Djiokeng Paka, G., Doggui, S., Zaghmi, A., Safar, R., Dao, L., Reisch, A., ... & Ramassamy, C. (2016). Neuronal uptake and neuroprotective properties of curcumin-loaded nanoparticles on SK-N-SH cell line: role of poly (lactide-co-glycolide) polymeric matrix composition. _Molecular pharmaceutics_, _13_(2), 391-403.](https://pubs.acs.org/doi/10.1021/acs.molpharmaceut.5b00611 "Neuronal Uptake and Neuroprotective Properties of Curcumin-Loaded Nanoparticles on SK-N-SH Cell Line: Role of Poly(lactide-co-glycolide) Polymeric Matrix Composition")
  3. Ege, D. (2021). Action mechanisms of curcumin in Alzheimer’s disease and its brain targeted delivery. _Materials_, _14_(12), 3332.
  4. [Huang, N., Lu, S., Liu, X. G., Zhu, J., Wang, Y. J., & Liu, R. T. (2017). PLGA nanoparticles modified with a BBB-penetrating peptide co-delivering Aβ generation inhibitor and curcumin attenuate memory deficits and neuropathology in Alzheimer's disease mice. _Oncotarget_, _8_(46), 81001.](https://pubmed.ncbi.nlm.nih.gov/29113362/ "PLGA nanoparticles modified with a BBB-penetrating peptide co-delivering Aβ generation inhibitor and curcumin attenuate memory deficits and neuropathology in Alzheimer's disease mice")
  5. [Lin, Y. W., Fang, C. H., Yang, C. Y., Liang, Y. J., & Lin, F. H. (2022). Investigating a curcumin-Loaded PLGA-PEG-PLGA thermo-sensitive hydrogel for the prevention of Alzheimer’s disease. _Antioxidants_, _11_(4), 727.](https://pubmed.ncbi.nlm.nih.gov/35453412/ "Investigating a Curcumin-Loaded PLGA-PEG-PLGA Thermo-Sensitive Hydrogel for the Prevention of Alzheimer's Disease")
  6. [Mathew, A., Fukuda, T., Nagaoka, Y., Hasumura, T., Morimoto, H., Yoshida, Y., ... & Kumar, D. S. (2012). Curcumin loaded-PLGA nanoparticles conjugated with Tet-1 peptide for potential use in Alzheimer's disease. _PLoS one_, _7_(3), e32616.](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0032616 "Curcumin Loaded-PLGA Nanoparticles Conjugated with Tet-1 Peptide for Potential Use in Alzheimer's Disease")
  7. [Neurogenesis, P. I. A. Curcumin-Loaded Nanoparticles.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6592058/ "Curcumin-loaded nanoparticles: a novel therapeutic strategy in treatment of central nervous system disorders")
  8. [Ray, B., Bisht, S., Maitra, A., Maitra, A., & Lahiri, D. K. (2011). Neuroprotective and neurorescue effects of a novel polymeric nanoparticle formulation of curcumin (NanoCurc™) in the neuronal cell culture and animal model: implications for Alzheimer's disease. _Journal of Alzheimer's disease_, _23_(1), 61.](https://content.iospress.com/articles/journal-of-alzheimers-disease/jad101374 "Neuroprotective and Neurorescue Effects of a Novel Polymeric Nanoparticle Formulation of Curcumin (NanoCurc™) in the Neuronal Cell Culture and Animal Model: Implications for Alzheimer's disease")
  9. [Shabbir, U., Rubab, M., Tyagi, A., & Oh, D. H. (2020). Curcumin and its derivatives as theranostic agents in Alzheimer’s disease: The implication of nanotechnology. _International Journal of Molecular Sciences_, _22_(1), 196.](https://pubmed.ncbi.nlm.nih.gov/33375513/ "Curcumin and Its Derivatives as Theranostic Agents in Alzheimer's Disease: The Implication of Nanotechnology")
  10. [Shahbaz, S. K., Koushki, K., Sathyapalan, T., Majeed, M., & Sahebkar, A. (2022). PLGA-based curcumin delivery system: An interesting therapeutic approach in the treatment of Alzheimer’s disease. _Current Neuropharmacology_, _20_(2), 309.](https://pubmed.ncbi.nlm.nih.gov/34429054/ "PLGA-Based Curcumin Delivery System: An Interesting Therapeutic Approach in the Treatment of Alzheimer's Disease")
  11. [Tiwari, S. K., Agarwal, S., Seth, B., Yadav, A., Nair, S., Bhatnagar, P., ... & Gupta, K. C. (2014). Curcumin-loaded nanoparticles potently induce adult neurogenesis and reverse cognitive deficits in Alzheimer’s disease model via canonical Wnt/β-catenin pathway. _ACS nano_, _8_(1), 76-103.](https://pubmed.ncbi.nlm.nih.gov/24467380/ "Curcumin-loaded nanoparticles potently induce adult neurogenesis and reverse cognitive deficits in Alzheimer's disease model via canonical Wnt/β-catenin pathway")
  12. [Yavarpour-Bali, H., Ghasemi-Kasman, M., & Pirzadeh, M. (2019). Curcumin-loaded nanoparticles: A novel therapeutic strategy in treatment of central nervous system disorders. _International journal of nanomedicine_, 4449-4460.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6592058/ "Curcumin-loaded nanoparticles: a novel therapeutic strategy in treatment of central nervous system disorders")
  13. [Zeng, H., Xu, L., Zou, Y., & Wang, S. (2023). The impacts of curcumin on learning memory function in Alzheimer’s disease under the poly lactic-co-glycolic acid nanoparticle drug carrier. _Applied Nanoscience_, _13_(5), 3483-3491.](https://link.springer.com/article/10.1007/s13204-022-02638-9 "The impacts of curcumin on learning memory function in Alzheimer’s disease under the poly lactic-co-glycolic acid nanoparticle drug carrier")

Appendix

Figure 3. Comparison of uncoated bulk curcumin (BC) with the curcumin-loaded nanoparticles (Cur-PLGA-NPs) performance in the brain. Curcumin-loaded nanoparticles increase cell proliferation. This comparison was studied by measuring neurospheres, a culture system of free-floating clusters of neural stem cells.[11]

Figure 4. Findings of the effect of the curcumin-loaded nanoparticles in AD and other neurodegenerative disorders (Parkinson’s disease, Multiple Sclerosis, Huntington’s disease, and Epilepsy).[12]

****

Posted in: Alzheimer's Research

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The products we offer are intended for IN-VITRO LABORATORY RESEARCH USE ONLY-- NOT FOR HUMAN USE.

In purchasing any of these items, the customer acknowledges that there are risks involved with consumption or distribution of these products.

These chemicals are NOT intended to use as food additives, drugs, household chemicals or other inappropriate applications.

The listing of a material on this site does not constitute a license to its use in infringement of any patent.

All of the products will be handled only by qualified and properly trained RESEARCH or LABORATORY professionals only.

Due to the nature of these products ALL SALES ARE FINAL. WE CANNOT ACCEPT RETURNS. ALL SALES ARE FINAL.

All customers represent and warrant that through their own review and study that they are fully aware and knowledgeable about the following:

Use of the products and more specifically In-vitro Research use of the products.

Your specific countries Government regulations regarding the use of and exposure to all products.

The health and safety hazards associated with the handling of the products they purchase.

The necessity of adequately warning of the health and safety hazards associated with any products.

reserves the right to limit and/or deny sales of products to any unqualified individuals. All customers MUST be at least 21 years of age to purchase our products. IN NO CIRCUMSTANCE SHALL BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER PURCHASER'S CLAIM IN CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE. IN DIRECT CONSIDERATION OF APPROVING THE SALE OF ANY PRODUCT TO THE PURCHASER, THE PURCHASER AGREES TO INDEMNIFY AND HOLD US HARMLESS FROM ALL CLAIMS, EXPENSES, LOSSES AND LIABILITY OF ANY TYPE ARISING OUT OF THE PURCHASER'S HANDLING, POSSESSION, AND/OR USE OF THE PRODUCT, WHETHER USED ALONE OR IN COMBINATION WITH ANY SUBSTANCE. ANY SALE WOULD BE DENIED OTHERWISE.

PRODUCT USE:

products are intended for laboratory IN-VITRO RESEARCH PURPOSES ONLY-- NOT FOR HUMAN USE and are not to be used for any other purposes, including but not limited to food and/or drugs, medical devices, vitro diagnostic purpose, or for commercial purposes. The purchaser agrees that the products have not been sterilized or tested by for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. The purchaser expressly represents and warrants to that the purchaser will properly test, use, manufacture and market any products purchased from and/or materials produced with products purchased from in accordance with the practices of a reliable person who is experienced in the field and in strict compliance with all applicable laws and regulations, now and hereinafter enacted. The purchaser further warrants that any material produced with any product shall not be adulterated or misbranded within the meaning of the Federal Food, Drug, and Cosmetic Act and shall not be materials which may not, under Sections 404, 505, or 512 of the Act, be introduced into interstate commerce.

The purchaser realizes that, since products are, unless otherwise stated, intended solely for in-vitro research purposes, they may not be on the Toxic Substances Control Act (TSCA) inventory listing. The purchaser assumes responsibility to assure that the products purchased from are approved for use under TSCA, if applicable.

Purchaser has the responsibility to verify the hazards and to conduct any further research necessary to learn the hazards involved in using products purchased from Purchaser agrees to comply with instructions, if any, furnished by relating to the use of the products and not misuse the products in any manner. No products purchased from shall, unless otherwise stated, be considered to be foods, drugs, or medical devices.

ALL products and services offered are for IN-VITRO RESEARCH purposes ONLY and are NOT TO BE INGESTED or CONSUMED IN ANY MANNER.

ALL PRODUCTS SOLD BY ARE NOT TO BE USED FOR PERSONAL USE OR FOR THE TREATMENT OF ANY MEDICAL CONDITION OR DISEASE.

Under NO circumstances shall/ should ANY of these materials be used for recreational purposes nor human consumption of any kind.

is NOT liable for ANY damages that may be caused by negligence, abuse, or ANY other unforeseen matter.

All items sold are legal for sale for IN-VITRO RESEARCH PURPOSES SPECIFICALLY within the USA.

Trade-Marks and Other Intellectual Property Rights

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Links/Software

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Relationship between and Users.

and users of our Site are independent contractors, and no agency, partnership, employment or other relationship is created or is intended to be created by the use of our Web Site.

Governing Law and Jurisdiction

This Web Site (excluding linked sites, if any) is administered and controlled by and its affiliates, subsidiaries, officers, directors, employees or agents from its offices in the accordance with the laws of Nevis. You agree that this Terms and Conditions of Use Agreement and this Web Site will be governed by and construed in accordance Nevis law without giving effect to any principles of conflicts of laws. You access this Web Site and/or associated services of at your own risk, and remain responsible for complying with the laws of the jurisdiction within which you are located.

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Consequences

reserves the right to suspend or terminate your account if you violate the Terms of Use Agreement. If your violation causes harm to others, you agree to indemnify and hold harmless from and against any and all loss, damage, or expense. If any dispute arises between us regarding this Agreement or your use of this Web Site, it shall be resolved through good faith negotiations between the parties.

Entire Agreement

These Terms and Conditions and any terms incorporated or referred to herein constitute the entire agreement between and you relating to your use of this Web Site and the subject matter hereof, and supersede any prior understandings or agreements (whether electronic, oral or written) regarding the subject matter, and may not be amended or modified except in writing, or by making such amendments or modifications in accordance with this Terms and Conditions of Use Agreement.

Severability

If any part of this Terms and Conditions of Use Agreement is deemed or determined to be unenforceable, then such part shall be eliminated or limited to the minimum extent necessary. The remainder of this Terms and Conditions of Use Agreement, including any revised portion, shall remain and be in full force and effect. This Terms and Conditions of Use Agreement are the entire agreement between us governing your use of this Web Site.

Headings

The headings contained in this Terms and Conditions of Use Agreement and the Privacy Policy are for reference only.

Force Majeure

shall not be liable for any delay or failure in performance caused by circumstances beyond its reasonable control, including, without limitation, delays due to backorders of requested products, mail delays, customs delays or lost shipments. shall not be responsible to notify the Customer in the event of such delays. The Customer shall be solely responsible to make other arrangements to purchase alternative products and any costs incurred in connection with such purchases.

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Complete Agreement

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