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So̷rensen H, Krcic N, George I, Kocherbitov V. A Structural Study on Absorption of Lysozyme in Amorphous Starch Microspheres. Mol Pharm 2024; 21:3416-3424. [PMID: 38739906 PMCID: PMC11220755 DOI: 10.1021/acs.molpharmaceut.4c00135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 05/03/2024] [Accepted: 05/06/2024] [Indexed: 05/16/2024]
Abstract
The potential of using proteins as drugs is held back by their low stability in the human body and challenge of delivering them to the site of function. Extensive research is focused on drug delivery systems that can protect, carry, and release proteins in a controlled manner. Of high potential are cross-linked degradable starch microspheres (DSMs), as production of these is low-cost and environmentally friendly, and the products are degradable by the human body. Here, we demonstrate that DSMs can absorb the model protein lysozyme from an aqueous solution. At low amounts of lysozyme, its concentration in starch microspheres strongly exceeds the bulk concentration in water. However, at higher protein contents, the difference between concentrations in the two phases becomes small. This indicates that, at lower lysozyme contents, the absorption is driven by protein-starch interactions, which are counteracted by protein-protein electrostatic repulsion at high concentrations. By applying small-angle X-ray scattering (SAXS) to the DSM-lysozyme system, we show that lysozyme molecules are largely unaltered by the absorption in DSM. In the same process, the starch network is slightly perturbed, as demonstrated by a decrease in the characteristic chain to chain distance. The SAXS data modeling suggests an uneven distribution of the protein within the DSM particles, which can be dependent on the internal DSM structure and on the physical interactions between the components. The results presented here show that lysozyme can be incorporated into degradable starch microspheres without any dependence on electrostatic or specific interactions, suggesting that similar absorption would be possible for pharmaceutical proteins.
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Affiliation(s)
- Henrik
Vinther So̷rensen
- Department
of Biomedical Science, Faculty of Health and Society, Malmö University, Malmö 20506, Sweden
- Biofilms
Research Center for Biointerfaces, Malmö
University, Malmö 20506, Sweden
| | - Nedim Krcic
- Magle
Chemoswed AB, Agneslundsvägen
27, Malmö 21215, Sweden
| | - Ian George
- Magle
Chemoswed AB, Agneslundsvägen
27, Malmö 21215, Sweden
| | - Vitaly Kocherbitov
- Department
of Biomedical Science, Faculty of Health and Society, Malmö University, Malmö 20506, Sweden
- Biofilms
Research Center for Biointerfaces, Malmö
University, Malmö 20506, Sweden
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Kauffels A, Nowack H, Bohnenberger H, Spitzner M, Sprenger T, Ghadimi M, Sperling J. Hepatic arterial infusion with nanoliposomal irinotecan leads to significant regression of tumor size of colorectal liver metastases in a CC531 rat model. Clin Exp Metastasis 2023:10.1007/s10585-023-10209-7. [PMID: 37093320 DOI: 10.1007/s10585-023-10209-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 04/17/2023] [Indexed: 04/25/2023]
Abstract
Long-term therapy for unresectable colorectal liver metastases remains challenging. Intraarterial treatments aim to avoid systemic adverse effects of chemotherapy. Nanoliposomal cytotoxic drugs manage to increase the drug concentration within the tumor while reducing toxicity in healthy tissue. In this study we analyzed the effect of hepatic arterial infusion (HAI) with nanoliposomal irinotecan with or without the combination of embolization particles in a rat model for colorectal liver metastases. For the study 32 WAG/Rij rats received subcapsular tumor implantation with CC531 rat colonic adenocarcinoma cells. After ten days tumor size was assessed via ultrasound and animals underwent HAI. One group served as control receiving NaCl 0.9 % (Sham), the three treatment groups received either nanoliposomal irinotecan (HAI nal iri), Embocept® S (HAI Embo) or Embocept® S and nanoliposomal irinotecan (HAI Embo+nal iri). Three days after treatment animals were sacrificed after assessment of tumor size. As a result all treatment groups showed a significant reduction in tumor growth compared to Sham (p<0.05). Expression of the apoptosis marker caspase-3 was enhanced in HAI nal iri and HAI Embo+nal iri compared to Sham and HAI Embo and even significantly enhanced after HAI Embo+nal iri in comparison to Sham (p<0.05). We were able to show that HAI with Embocept® S led to significantly reduced tumor growth while HAI with nanoliposomal irinotecan alone or in combination with Embocept® S even led to a reduction of tumor size. Thus, we demonstrate that intraarterial treatment with nanoliposomal irinotecan effectively inhibits tumor growth in a rat model of colorectal liver metastases and demands further investigation.
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Affiliation(s)
- Anne Kauffels
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany.
- Department of General, Visceral, Thoracic, Transplantation and Pediatric Surgery, University Hospital of Giessen, Rudolf-Buchheim-Str. 7, D-35292, Giessen, Germany.
| | - Hannah Nowack
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany
- Department of Internal Medicine, Asklepios Hospital, Schwalmstadt, Germany
| | | | - Melanie Spitzner
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany
| | - Thilo Sprenger
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany
- Department of General, Visceral, Thoracic, Transplantation and Pediatric Surgery, University Hospital of Giessen, Rudolf-Buchheim-Str. 7, D-35292, Giessen, Germany
| | - Michael Ghadimi
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany
| | - Jens Sperling
- Department of General, Visceral and Pediatric Surgery, University Medical Center, Goettingen, Germany
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Labelle M, Ispas‐Szabo P, Mateescu MA. Structure‐Functions Relationship of Modified Starches for Pharmaceutical and Biomedical Applications. STARCH-STARKE 2020. [DOI: 10.1002/star.202000002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Marc‐André Labelle
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
| | - Pompilia Ispas‐Szabo
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
| | - Mircea Alexandru Mateescu
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
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