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Boostani S, Sarabandi K, Tarhan O, Rezaei A, Assadpour E, Rostamabadi H, Falsafi SR, Tan C, Zhang F, Jafari SM. Multiple Pickering emulsions stabilized by food-grade particles as innovative delivery systems for bioactive compounds. Adv Colloid Interface Sci 2024; 328:103174. [PMID: 38728772 DOI: 10.1016/j.cis.2024.103174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/21/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024]
Abstract
The most common carrier for encapsulation of bioactive components is still simple emulsion. Recently, bio-based novel emulsion systems such as multiple emulsions (MEs) and Pickering emulsions (PEs) have been introduced as innovative colloidal delivery systems for encapsulation and controlled release of bioactive compounds. Multiple PEs (MPEs), which carries both benefit of MEs and PEs could be fabricated by relatively scalable and simple operations. In comparison with costly synthetic surfactants and inorganic particles which are widely used for stabilization of both MEs and PEs, MPEs stabilized by food-grade particles, while having health-promoting aspects, are able to host the "clean label" and "green label" attributes. Nevertheless, in achieving qualified techno-functional attributes and encapsulation properties, the selection of suitable materials is a crucial step in the construction of such complex systems. Current review takes a cue from both MEs and PEs emulsification techniques to grant a robust background for designing various MPEs. Herein, various fabrication methods of MEs and PEs are described comprehensively in a physical viewpoint in order to find key conception of successful formulation of MPEs. This review also highlights the link between the underlying aspects and exemplified specimens of evidence which grant insights into the rational design of MPEs through food-based ingredients to introduces MPEs as novel colloidal/functional materials. Their utilization for encapsulation of bioactive compounds is discussed as well. In the last part, instability behavior of MPEs under various conditions will be discussed. In sum, this review aims to gain researchers who work with food-based components, basics of innovative design of MPEs.
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Affiliation(s)
- Sareh Boostani
- Shiraz Pharmaceutical Products Technology Incubator, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Khashayar Sarabandi
- Department of Food Chemistry, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran
| | - Ozgur Tarhan
- Food Engineering Department, Engineering Faculty, Uşak University, 1 Eylul Campus, Uşak 64100, Türkiye
| | - Atefe Rezaei
- Department of Food Science and Technology, School of Nutrition and Food Science, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Elham Assadpour
- Food Industry Research Co., Gorgan, Iran; Food and Bio-Nanotech International Research Center (Fabiano), Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Hadis Rostamabadi
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Seid Reza Falsafi
- Isfahan Endocrine and Metabolism Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Chen Tan
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education. China-Canada Joint Lab of Food Nutrition and Health (Beijing), School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Fuyuan Zhang
- College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran; Halal Research Center of IRI, Iran Food and Drug Administration, Ministry of Health and Medical Education, Tehran, Iran.
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Yardimci AI, Kayhan M, Tarhan O. Polyacrylonitrile (PAN)/Polyvinyl Alcohol (PVA) Electrospun Nanofibrous Membranes Synthesis, Characterizations and Their Air Permeability Properties. J MACROMOL SCI B 2023. [DOI: 10.1080/00222348.2023.2187133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
| | - Mehmet Kayhan
- Scientific Analysis, Technological Application and Research Center, Usak University, Usak, Turkey
| | - Ozgur Tarhan
- Department of Food Engineering, Usak University, Usak, Turkey
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Shaddel R, Akbari-Alavijeh S, Cacciotti I, Yousefi S, Tomas M, Capanoglu E, Tarhan O, Rashidinejad A, Rezaei A, Bhia M, Jafari SM. Caffeine-loaded nano/micro-carriers: Techniques, bioavailability, and applications. Crit Rev Food Sci Nutr 2022:1-26. [PMID: 36412258 DOI: 10.1080/10408398.2022.2147143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Caffeine, as one of the most consumed bioactive compounds globally, has gained considerable attention during the last years. Considering the bitter taste and adverse effects of high levels of caffeine consumption, it is crucial to apply a strategy for masking the caffeine's bitter taste and facilitating its programmable deliverance within a long time. Other operational parameters such as food processing parameters, exposure to sunlight and oxygen, and gastrointestinal digestion could also degrade the phenolic compounds in general and caffeine in special. To overcome these challenges, various nano/micro-platforms have been fabricated, including lipid-based (e.g., nanoliposomal vehicles; nanoemulsions, double emulsions, Pickering emulsions; microemulsions; niosomal vehicles; solid lipid nanoparticles and nanostructured lipid carriers), as well as biopolymeric (e.g., nanoparticles; hydrogels, organogels, oleogels; nanofibers and nanotubes; protein-polysaccharide nanocomplexes, conjugates; cyclodextrin inclusion complexes) and inorganic (e.g., gold and silica nanoparticles) nano/micro-structures. In this review, the findings on various caffeine-loaded nano/micro-carriers and their potential applications in functional food products/supplements will be discussed. Also, the controlled release and bioavailability of encapsulated caffeine will be given, and finally, the toxicity and safety of encapsulated caffeine will be presented.
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Affiliation(s)
- Rezvan Shaddel
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Safoura Akbari-Alavijeh
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Ilaria Cacciotti
- Department of Engineering, INSTM RU, University of Rome "Niccolò Cusano", Roma, Italy
| | - Shima Yousefi
- Department of Agriculture and Food Science, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Merve Tomas
- Faculty of Engineering and Natural Sciences, Food Engineering Department, Istanbul Sabahattin Zaim University, Istanbul, Turkey
| | - Esra Capanoglu
- Faculty of Chemical and Metallurgical Engineering, Food Engineering Department, Istanbul Technical University, Istanbul, Turkey
| | - Ozgur Tarhan
- Department of Food Engineering, Engineering Faculty, Uşak University, Uşak, Turkey
| | - Ali Rashidinejad
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Atefe Rezaei
- Department of Food Science and Technology, School of Nutrition and Food Science, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammed Bhia
- Student Research Committee, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Nanomedicine Research Association (NRA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
- Department of Analytical Chemistry and Food Science, Faculty of Science, Universidade de Vigo, Nutrition and Bromatology Group, Ourense, Spain
- College of Food Science and Technology, Hebei Agricultural University, Baoding, China
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Ince Yardimci A, Durmus A, Kayhan M, Tarhan O. Antibacterial Activity of AgNO 3 Incorporated Polyacrylonitrile/Polyvinylidene Fluoride (PAN/PVDF) Electrospun Nanofibrous Membranes and Their Air Permeability Properties. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2101970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
| | - Aslı Durmus
- Department of Molecular Biology and Genetics, Usak University, Usak, Turkey
| | - Mehmet Kayhan
- Scientific Analysis, Technological Application and Research Center, Usak University, Usak, Turkey
| | - Ozgur Tarhan
- Department of Food Engineering, Usak University, Usak, Turkey
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Bahrami A, Delshadi R, Cacciotti I, Faridi Esfanjani A, Rezaei A, Tarhan O, Lee CC, Assadpour E, Tomas M, Vahapoglu B, Capanoglu Guven E, Williams L, Jafari SM. Targeting foodborne pathogens via surface-functionalized nano-antimicrobials. Adv Colloid Interface Sci 2022; 302:102622. [PMID: 35248971 DOI: 10.1016/j.cis.2022.102622] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 02/21/2022] [Accepted: 02/25/2022] [Indexed: 01/10/2023]
Abstract
The incorporation of antibiotics and bioactive compounds into non-toxic nanoparticles has been popularly used to produce effective antimicrobial nanocarriers against foodborne pathogens. These systems can protect antimicrobials against harsh environments, control their release, and increase their antimicrobial activities; however, their functions can be decreased by some major barriers. Intracellular localization of bacteria protects them from the host immune system and antimicrobial agents. Also, bacteria can cause constant infection by nestling in professional phagocytic cells. In the last years, surface functionalization of nanocarriers by passive and active modification methods has been applied for their protection against clearance from the blood, increasing both circulation time and uptake by target cells. For achieving this objective, different functional agents such as specifically targeted peptides internalize ligands, saccharide ligands, or even therapeutic molecules (e.g., antibodies or enzymes) are used. In this review, techniques for functionalizing the surface of antimicrobial-loaded nanocarriers have been described. This article offers a comprehensive review of the potential of functional nanoparticles to increase the performance of antimicrobials against foodborne pathogens through targeting delivery.
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Rashidinejad A, Tarhan O, Rezaei A, Capanoglu E, Boostani S, Khoshnoudi-Nia S, Samborska K, Garavand F, Shaddel R, Akbari-Alavijeh S, Jafari SM. Addition of milk to coffee beverages; the effect on functional, nutritional, and sensorial properties. Crit Rev Food Sci Nutr 2021; 62:6132-6152. [PMID: 33703975 DOI: 10.1080/10408398.2021.1897516] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
To date, there exists a debate on the effect of milk added to coffee infusions/beverages concerning the nutritional quality of coffee and the functional properties of its phenolic compounds. Yet, the full nutritional quality and functional properties of a coffee beverage without a significant negative impact on its sensorial profile are highly desired by the consumers. Negative/masking, positive, and neutral effects of milk on the antioxidant activity and bioavailability of coffee phenolics (particularly, chlorogenic acids) have been reported. Some potential factors including the type and amount of milk added, type of coffee beverage, the composition of both milk (protein and fat) and coffee (phenolic compounds), preparation method, assays used to measure antioxidant properties, and sampling size may account for the various reported findings. Interactions between phenolic compounds in coffee and milk proteins could account as the main responsible aspect for the reported masking/negative impact of milk on the antioxidant activity and bioaccessibility/bioavailability of coffee bioactives. However, considering the interactions between milk components and coffee phenolics, which result in the loss of their functionality, the role of milk fat globules and the milk fat globule membrane can also be crucial, but this has not been addressed in the literature so far.HighlightsIn most cases, milk is added to the coffee beverages in several various ways.Effect of milk on the nutritional/functional properties of coffee is controversial.Enough evidence suggests negative effects of milk addition on properties of coffee.Interactions of coffee phenolics and milk proteins could account as the main aspect.The role of milk fat globules and milk fat globule membrane may also be crucial.
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Affiliation(s)
- A Rashidinejad
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | - O Tarhan
- Department of Food Engineering, Faculty of Engineering, Uşak University, Uşak, Turkey
| | - A Rezaei
- Department of Food Science and Technology, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - E Capanoglu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Istanbul, Turkey
| | - S Boostani
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - S Khoshnoudi-Nia
- Seafood Processing Research Group, School of Agriculture, Shiraz University, Shiraz, Iran
| | - K Samborska
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences WULS-SGGW, Warsaw, Poland
| | - F Garavand
- Department of Food Chemistry & Technology, Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - R Shaddel
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - S Akbari-Alavijeh
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - S M Jafari
- Department of Food Materials & Process Design Engendering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
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Tarhan O, Spotti MJ. Nutraceutical delivery through nano-emulsions: General aspects, recent applications and patented inventions. Colloids Surf B Biointerfaces 2021; 200:111526. [PMID: 33517153 DOI: 10.1016/j.colsurfb.2020.111526] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/24/2020] [Accepted: 12/07/2020] [Indexed: 01/09/2023]
Abstract
Nanostructured emulsions have a significant potential for encasing, transport and delivery of hydrophilic and lipophilic nutraceuticals and other bioactive compounds by providing enhanced stability and functionality in food and pharmaceutical applications. As highlighted in recent researches, essential fatty acids (EFA) and oils (EO), antioxidants, vitamins, minerals, pro and prebiotics, and co-enzymes, are common bioactives encapsulated in nanoscale delivery systems in order to protect them from degradation during processing and storage, and to improve bioavailability after their consumption. Nanoemulsions (NEs) as delivery systems for nutraceuticals comprise either oil-in-water (O/W) or water-in-oil (W/O) biphasic dispersion with nano-sized droplets, which are stabilized through an active surfactant. Both high- and low- energy methods are used to produce well-structured and stable NEs with advanced structural and rheological features. The in vitro and in vivo studies are focused to assess the nutraceutical releasing profile, gastrointestinal transportation and cytotoxicity of nutraceutical loaded NE. Within the last three decades, a number of NE systems have been developed for certain purposes and submitted for patent approval. Currently, there are many issued patents published as well as and applications under process. This review focus on the current status of food-grade NEs in terms of formation, characterization, relevant applications of nutraceutical delivery, and the recent developments including patented systems.
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Affiliation(s)
- Ozgur Tarhan
- Food Engineering Department, Uşak University, 1 Eylül Campus, 64100, Uşak, Turkey.
| | - Maria Julia Spotti
- Food Technology Institute, Faculty of Chemical Engineering, National University of Litoral, 1 de Mayo 3250, 3000, Santa Fe, Argentina
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Tarhan T, Meurer A, Tarhan O. Combined extra-/intrathoracic correction of pectus carinatum and other asymmetric chest wall deformities : A novel technique. Oper Orthop Traumatol 2018; 30:469-478. [PMID: 30310933 DOI: 10.1007/s00064-018-0567-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Description of a novel technique to surgically correct (asymmetric) pectus carinatum and other chest deformities using a metal bar without fixation to the ribs. INDICATIONS Severe thoracic deformity, extensive psychological strain, social isolation, pain and respiratory complaints. Pseudarthrosis or insufficient correction of a thoracic deformity after prior surgery. Distinctive deformities. CONTRAINDICATIONS Acute infections. Postoperative intrathoracic scaring in revision cases can be challenging. SURGICAL TECHNIQUE One-lung ventilation is used. Through two 3-4 cm long bilateral incisions to the thorax, an introducer is guided into the thorax under thoracoscopic supervision and then guided through an intercostal space out of the thorax again. A 1 cm presternal incision is performed and nylon threads are attached to the introducer bilaterally. Then the preshaped metal bar can be placed following the nylon threads. Once the metal bar is placed, the deformity is instantly corrected. Bilateral stabilizers are fixed with wire cerclage. Fixation on the ribs is not necessary. POSTOPERATIVE MANAGEMENT Postoperative thorax x‑ray. Intensive ventilation exercises. Implant removal after 2-3 years. RESULTS The technique was used in 10 primary pectus carinatum or combined pectus carinatum and excavatum deformities as well as in 6 revision cases (3 female, 13 male, age 13-32 years). Follow-up ranged from 3-15 months postoperatively. Cosmetic results were excellent. Revision surgery required in 2 patients (one rib fracture and one local implant irritation).
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Affiliation(s)
- T Tarhan
- Orthopädische Universitätsklinik Friedrichsheim gGmbH, Marienburgstr. 2, 60528, Frankfurt, Germany.
| | - A Meurer
- Orthopädische Universitätsklinik Friedrichsheim gGmbH, Marienburgstr. 2, 60528, Frankfurt, Germany
| | - O Tarhan
- Orthopädische Universitätsklinik Friedrichsheim gGmbH, Marienburgstr. 2, 60528, Frankfurt, Germany
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Alacacioglu A, Kebapcilar L, Gokgoz Z, Oztekin O, Bozkaya G, Tarhan O, Somali I, Yuksel A, Sop G, Sari I. Leptin, insulin and body composition changes during adjuvant taxane based chemotherapy in patients with breast cancer, preliminary study. Indian J Cancer 2017; 53:39-42. [PMID: 27146736 DOI: 10.4103/0019-509x.180836] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The objectives of the present study were to compare the effect of adjuvant chemotherapy for breast cancer on serum insulin levels, serum leptin levels, and body composition in early stage breast cancer patients. MATERIALS AND METHODS 17 breast cancer patients underwent 6 cycles of docetaxel (75 mg), epirubicine (100 mg) and cyclophosphamide (500 mg) (TEC). Anthropometrical and foot-to-foot body fat analyzer BIA, serum glucose, insulin, lipids, HOMA-IR and leptin were compared pre- and post-treatment. RESULTS There was no statistically significant weight gain after treatment; however, there was an overall trend toward weight gain (69.7 ± 9.8 kg vs 71.03 ± 9.8; P= 0.05). From baseline to the end of the study, percentage of body fat and body fat mass showed an upward trend at the end of chemotherapy (1%; 2 kg P> 0.05). Pre and post-treatment period, leptin was strongly correlated with insulin and HOMA-IR (Spearman's pre-T; r = 0.74; P <0.001, r = 0.66; P = 0.004 post-T; r = 0.549; P =0.022, r = 0.51; P =0.036, respectively). Insulin levels were significantly increased in the post-treatment period (P < 0.05). On correlation analysis, post-T insulin levels were correlated with leptin, weight, fat-mass and fat percentage (Spearman's r = 0.549; P=.022, r = 0.567; P= 0.018, r = 0.498, P= 0.042, r = 0.502; P= 0.040, respectively). DISCUSSION High insulin and leptin levels, important factors that were previously shown to be related to breast cancer outcome, and insulin resistance may be increased in taxane based chemotherapy regimen. These data may have broad implications for diet and lifestyle strategies for the prevention and treatment of cancers.
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Affiliation(s)
- A Alacacioglu
- Department of Medical Oncology, Izmir Bozyaka Research and Training Hospital, Turkey
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Tarhan O, Spotti MJ, Schaffter S, Corvalan CM, Campanella OH. Rheological and structural characterization of whey protein gelation induced by enzymatic hydrolysis. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.04.042] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Akyol M, Demir L, Alacacioglu A, Ellidiokuz H, Kucukzeybekl Y, Yildiz Y, Bayoglu V, Yildiz I, Salman T, Varol U, Kucukzeybek B, Demir L, Dirican A, Sutcu R, Tarhan O. 1953 The effects of adjuvant endocrine treatment on the serum leptin, adiponectin and body composition in patients with breast cancer [Izmir Oncology Group(IZOG) Study]. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30901-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Reguera J, Petit C, Scarabelli L, Liu X, Malachosky E, Martin M, Law B, Lin XM, Moehwald H, Schurtenberger P, Wolf H, Meli V, Faivre D, Akinoglu EM, Ganeshan D, Bresme F, Liu Y, Kunstmann-Olsen C, Sorensen C, Ghosh S, Yapa A, Widmer-Cooper A, Cardinal MF, Gallego A, Tarhan O, Okram G, Fery A, Del Gado E, Isa L, Perzynski R, Korgel B. Self-assembly processes: general discussion. Faraday Discuss 2015; 181:299-323. [DOI: 10.1039/c5fd90043c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sun Y, Scarabelli L, Kotov N, Tebbe M, Lin XM, Brullot W, Isa L, Schurtenberger P, Moehwald H, Fedin I, Velev O, Faivre D, Sorensen C, Perzynski R, Chanana M, Li Z, Bresme F, Král P, Firlar E, Schiffrin D, Souza Junior JB, Fery A, Shevchenko E, Tarhan O, Alivisatos AP, Disch S, Klajn R, Ghosh S. Field-assisted self-assembly process: general discussion. Faraday Discuss 2015; 181:463-79. [DOI: 10.1039/c5fd90041g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ozcan O, Durmus H, Tarhan O, Polat Z, Deymeer F, Parman Y, Oflazer-Serdaroglu P. G.P.8. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Alacacioglu A, Tarhan O, Alacacioglu I, Dirican A, Yilmaz U. Depression and anxiety in cancer patients and their relatives. J BUON 2013; 18:767-774. [PMID: 24065497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
PURPOSE To investigate the depression and anxiety levels and the factors that affect patients receiving chemotherapy and their relatives with the Beck Depression Inventory (BDI) and State-Trait Anxiety Inventory (STAI) scoring system. METHODS 330 patients and 330 relatives of these patients were enrolled in this study. The study forms including the questions regarding the patient demographic characteristics, BDI, and STAI were completed during face-to-face interviews by trained interviewers for the determination of the psychological status of the patients and their relatives. BDI and STAI were validated for Turkish population by studies made before. RESULTS According to BDI scale, 96 (29.1%) patients had mild and 60 (18.2%) had severe depression. Seventy-one (21.5%) relatives had mild and 24 (7.3%) had severe depression. Anxiety evaluation was made by STAI scale and a statistical difference emerged between patients and relatives (patients: 44.93±8.8 vs relatives: 43.27±8.5, p=0.015). The depression and anxiety levels were higher in women, in people with low socio-economic level, in people having a time period between diagnosis and participation in the study longer than 6 months, and in people having relapsing disease. CONCLUSION Since there are many emotional and psychological disorders in patients and their relatives, much attention should be paid in order to diagnose and treat their psychiatric disorders and enough information about their disease should be given.
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Affiliation(s)
- A Alacacioglu
- Izmir Katip Celebi University, Ataturk Research and Training Hospital, Department of Medical Oncology, Izmir, Turkey
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Oztop I, Alacacioglu A, Unek IT, Tarhan O, Somali I, Cokmert S, Yavuzsen T, Yilmaz U. Gemcitabine plus infusional 5-fluorouracil and high dose leucovorin in advanced stage pancreatic cancer. J BUON 2010; 15:462-469. [PMID: 20941811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
PURPOSE Advanced pancreatic cancer (APC) has a poor prognosis and chemotherapy remains the primary treatment modality. Gemcitabine (GEM) and 5-fluorouracil (5-FU) are the most active drugs in the treatment of pancreatic cancer. This study evaluated the efficacy and tolerability of the combination of these agents in APC. METHODS Forty-four patients with APC were treated with GEM and infusional 5-FU with high dose leucovorin (LV5FU2) (GEMFUFOL regimen). RESULTS A total of 240 chemotherapy cycles were administered. The overall response rate was 27.2%, and all responses were partial. Furthermore, disease stabilization was observed in 12 patients (27.2%). Median survival time and one-year survival rate were 9 months and 36.4%, respectively. The overall grade 3 or 4 adverse events were very low and mostly hematological. CONCLUSION GEMFUFOL is still an active regimen for the treatment of APC and has an acceptable toxicity.
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Affiliation(s)
- I Oztop
- Dokuz Eylul University, Institute of Oncology, and Atatürk Training and Research Hospital, Department of Medical Oncology, Inciralti, Izmir, Turkey.
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Alacacioglu A, Kebapcilar L, Sari I, Gokgoz Z, Tarhan O, Somali I, Yuksel A, Bozkaya G, Sop G. Taxane-based adjuvant chemotherapy reduces endothelin-1 and symmetric dimethylarginine levels in patients with breast cancer. J BUON 2010; 15:572-576. [PMID: 20941830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
PURPOSE To evaluate the levels of asymmetric dimethylarginine (ADMA), an endothelin and nitric oxide (NO) synthase inhibitor, in patients with node-positive breast cancer who had undergone surgery and in a control group including healthy individuals. The effects of taxane-based chemotherapy on endothelin-1 (ET-1) and ADMA levels in the patient group were also studied. METHODS Body mass index (BMI), serum lipids (total cholesterol, LDL-cholesterol, HDL-cholesterol and triglycerides), ADMA and ET-1 were studied in 19 healthy individuals and in 19 patients with stage II and III, lymph node-positive breast cancer receiving taxane-based chemotherapy. RESULTS ET-1 (34.3±12.8 vs. 13.8±4.5 pg/mL; p<0.001) and ADMA (0.87±0.18 vs. 0.68±0.24 μmol/L; p=0.024) levels were significantly higher in the breast cancer group compared to the control group. A significant reduction was noted in ET-1 (34.3±12.8 vs. 27.3±4.3 pg/mL; p=0.021) and ADMA (0.87±0.18 vs. 0.73±0.15 μmol/L; p=0.014) levels in patients following 6 cycles of adjuvant chemotherapy to baseline values. CONCLUSION The present study demonstrated significantly higher levels of ET-1 and ADMA in the breast cancer group compared to the control group, which were reduced significantly with adjuvant taxane-based chemotherapy. It is apparent that prospective studies are needed to understand the effect of reducing ET-1 and ADMA levels on patient survival. We believe that the present study will provide guidance to relevant future studies.
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Affiliation(s)
- A Alacacioglu
- Department of Medical Oncology, Bozyaka Research and Training Hospital, Izmir, Turkey.
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Tarhan O, Alacacioglu A, Somali I, Sipahi H, Zencir M, Oztop I, Dirioz M, Yilmaz U. Complementary-alternative medicine among cancer patients in the western region of Turkey. J BUON 2009; 14:265-269. [PMID: 19650177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
PURPOSE To investigate the complementary/alternative medicine (CAM) applications and factors affecting its use among cancer patients in the western region of Turkey. PATIENTS AND METHODS Face-to-face interview technique was used. Patients were asked to answer a questionnaire about their socio-demographic features, their level of knowledge about the disease and CAM application features. RESULTS 220 adult cancer patients (79 male) were evaluated. Ninety-three (42.3%) were using at least one CAM method, the most common being herbal products which were preferred by 81 (36.3%) patients. Stinging nettle (Urtica dioica) was the most commonly used herbal product. Next was nutritional support, preferred by 45 (20.3%) patients. Eighty- nine (44.5%) of 200 patients who knew the diagnosis and 4 of 20 (20%) who did not were using CAM. In the patient group with awareness of the diagnosis, CAM application was significantly higher (p=0.034). CAM applications were detected in 34 of 70 (48.5%) patients with recurrent disease while 54 of 150 (36%) patients without recurrent disease were using CAM. The CAM applications were significantly higher in the group with recurrent disease (p=0.006). Fifty-three of 103 (51.4%) patients who had advanced disease were using CAM, while only 40 of 117 (34.1%) patients with local or locally advanced disease were using it. CAM applications were significantly higher in the group with advanced disease (p=0.030). Besides, knowing the diagnosis and disease recurrence were also independent risk factors for CAM usage [odds ratio (OR(: 3.1; 95% confidence interval (CI): 1.0-9.8 and OR: 2.2; 95% CI: 1.2-4.0 respectively]. As a result, nearly half of the patients (42.3%) in this region were using at least one of the CAM methods. CONCLUSION The severity of the disease (recurrence and dissemination) and patients' awareness of the diagnosis were the most important factors affecting the CAM applications.
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Affiliation(s)
- O Tarhan
- Ataturk Training and Research Hospital, Department of Medical Oncology, and Dokuz Eylul University, Institute of Oncology, Izmir, Turkey
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Unek IT, Alacacioglu A, Tarhan O, Sevinc AI, Oztop I, Sagol O, Canda T, Obuz F, Balci P, Yilmaz U. Synchronous appearance of male breast cancer and pancreatic cancer 15 years after the diagnosis of testicular cancer--report of a case. J BUON 2008; 13:421-424. [PMID: 18979560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The frequency of new neoplastic diseases among patients cured of testicular cancer is higher than in normal population. For these patients, synchronous occurrence of multiple neoplasms is not common. Also, less than 1% of all cases of breast cancer occur in males. We present herein a case having both breast and concurrent pancreatic cancer after being effectively treated for testicular cancer. To the best of our knowledge, this is the first case of synchronous breast and pancreatic cancer in a male patient following testicular cancer. Second cancer is the most severe long-term complication of chemotherapy or radiotherapy for patients with testicular cancer and the possibility of multiple cancers has to be taken into consideration when multiple lesions are present.
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Affiliation(s)
- I T Unek
- Dokuz Eylul University School of Medicine, Department of Internal Medicine, Izmir, Turkey
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Tarhan O, Canbay O, Celebi N, Uzun S, Sahin A, Coşkun F, Aypar U. Subhypnotic doses of midazolam prevent nausea and vomiting during spinal anesthesia for cesarean section. Minerva Anestesiol 2007; 73:629-633. [PMID: 18046293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND We aimed to evaluate the efficacy of subhypnotic doses of midazolam and propofol for peripartum nausea and vomiting during regional anesthesia for elective cesarean section in order to prevent emesis in at least 50% of patients. METHODS A prospective, double blind, placebo-controlled study was carried out. Patients were randomly allocated to one of three groups to receive placebo (saline, N=28), propofol (20 mg bolus and 1.0 mg x kg(-1) x h(-1) infusion, N=30), and midazolam (1 mg bolus and 1.0 mg x h(-1) infusion, N=30) at subhypnotic doses intravenously (i.v.) immediately after the umbilical cord was clamped. Bupivacaine hydrochloride (8-10 mg) and fentanyl (10 microg) were injected into the intervertebral space for spinal anesthesia. Blood pressure was monitored at 2 min intervals and intraoperative postdelivery emetic episodes and ephedrine consumption were recorded. The study was carried out at the Anesthesiology Department, Hacettepe University, Turkey, hospitalized care. We included 90 parturients with ASA physical status I and II between the ages of 20 and 38 years undergoing spinal anesthesia for elective cesarean delivery to evaluate the efficacy of subhypnotic doses of propofol and midazolam and, in particular, the incidence of nausea, retching, and vomiting intraoperatively. RESULTS The incidence of nausea, retching, and vomiting was significantly higher in the control group, compared to the propofol and midazolam groups. Total ephedrine consumption was significantly higher in the control group compared to the propofol and midazolam groups. CONCLUSION A subhypnotic dose of midazolam (1 mg x h(-1)) was as effective as the subhypnotic dose of propofol (1 mg x kg(-1) x h(-1)) for the prevention of nausea and vomiting in parturients undergoing cesarean section under spinal anesthesia.
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Affiliation(s)
- O Tarhan
- Department of Anesthesiology, Faculty of Medicine, Hacettepe University of Ankara, Turkey
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Alacacioglu A, Solmaz D, Oztop I, Tarhan O, Yaren A, Yassin S, Sokmen S, Kargi A, Akkoclu A, Yilmaz U. A patient with rectum cancer, and subcutaneous and pulmonary metastases. Breathe (Sheff) 2005. [DOI: 10.1183/18106838.0202.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Yilmaz U, Oztop I, Alacacioglu A, Yaren A, Tarhan O, Somali I. Irinotecan combined with infusional 5-fluorouracil and high-dose leucovorin (FOLFORI) for the treatment of advanced gastric carcinoma as the first-line chemotherapy. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | - I. Oztop
- Univ of Dokuz Eylul, Izmir, Turkey
| | | | - A. Yaren
- Univ of Dokuz Eylul, Izmir, Turkey
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Ozmen S, Yavuz L, Ceylan BG, Tarhan O, Aydin C. Comparison of granisetron with granisetron plus droperidol combination prophylaxis in post-operative nausea and vomiting after laparoscopic cholecystectomy. J Int Med Res 2002; 30:520-4. [PMID: 12449522 DOI: 10.1177/147323000203000508] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to evaluate the effects of granisetron and granisetron plus droperidol combination therapy on post-operative nausea and vomiting (PONV) in 60 patients who had undergone elective laparoscopic cholecystectomy. Induction of anaesthesia was achieved using 5 mg/kg thiopentone, 2 micrograms/kg fentanyl and 0.5 mg/kg atracurium, and anaesthesia was maintained with 2-2.5% sevoflurane. The patients were randomly assigned to two groups: group G (granisetron) (n = 30) patients received 3 mg granisetron and group GD (granisetron plus droperidol) (n = 30) patients received 3 mg granisetron and 1.25 mg droperidol shortly before the induction of anaesthesia. PONV incidence was recorded post-operatively at 15 min, 30 min, 60 min, 2 h, 4 h, 12 h and 24 h. While PONV prophylaxis provided almost complete emetic control in patients who received the granisetron plus droperidol combination, patients who received granisetron prophylaxis alone experienced PONV more frequently at 30 min and 60 min post-operatively. We conclude that addition of a low dose of droperidol to granisetron prophylaxis is more effective than granisetron prophylaxis alone for successful control of PONV.
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Affiliation(s)
- S Ozmen
- Department of Anaesthesiology and Reanimation, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey.
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Hekimsoy Z, Biberoğlu S, Cömlekçi A, Tarhan O, Mermut C, Biberoğlu K. Trimethoprim/sulfamethoxazole-induced hypoglycemia in a malnourished patient with severe infection. Eur J Endocrinol 1997; 136:304-6. [PMID: 9100556 DOI: 10.1530/eje.0.1360304] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hypoglycemia resulting from the combination of sulfonylurea and sulfonamides is a recognized drug interaction. Hypoglycemia induced by sulfonamides alone may be encountered less frequently. Because of their structural similarities to sulfonylureas, sulfonamides are liable to facilitate hypoglycemia by increasing insulin release in susceptible individuals. Sulfonamides can potentiate the hypoglycemic effect of sulfonylurea agents when given in combination. We describe a malnourished patient with severe infection who developed hypoglycemia during high-dose trimethoprim/sulfamethoxazole therapy. Elevated C-peptide concentrations during the hypoglycemic episode indicate that hypoglycemia resulted from increased endogenous insulin secretion. As malnourished patients are prone to hypoglycemia, we suggest that they should be monitored carefully if they are on sulfonamide therapy.
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Affiliation(s)
- Z Hekimsoy
- Dokuz Eylül University, Medical Faculty, Department of Internal Medicine, Izmir, Turkey
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Gündüç Y, Tarhan O, Sever R. Critical-index calculation from Monte Carlo data with use of finite-size scaling and optimization. Phys Rev B Condens Matter 1993; 48:9851-9854. [PMID: 10007241 DOI: 10.1103/physrevb.48.9851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tarhan O, Gürtner I, Schmidt A. [Case histories of therapy of traumatic knee joint dislocation]. Unfallchirurg 1993; 96:319-22. [PMID: 8342060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The records of eight patients with traumatic knee dislocation and operative treatment in 1981-1991 were reviewed. In this retrospective study the average follow-up was 6 years and indicated good results concerning stability and functional use of the knee. The vascular complications, especially the ischemic syndrome are associated with an emergency situation that requires immediate reduction.
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Affiliation(s)
- O Tarhan
- Unfallchirurgische Klinik, Städtischen Kliniken Offenbach/Main
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Ho W, Tarhan O, Kiorpes TC, Tutwiler GF, Mohrbacher RJ. Resolution of (+/-)-2-tetradecyloxiranecarboxylic acid. Absolute configuration and chiral synthesis of the hypoglycemic R enantiomer and biological activity of enantiomers. J Med Chem 1987; 30:1094-7. [PMID: 3585906 DOI: 10.1021/jm00389a020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The resolution of the hypoglycemic agent (+/-)-2-tetradecyloxiranecarboxylic acid (3) as its d- and l-ephedrine salts is presented. The active enantiomer (R)-(+)-3 was also synthesized by the Sharpless chiral epoxidation procedure and its methyl ester (R)-(+)-4 was shown to be identical with the corresponding ester from the resolved acid. Single-crystal X-ray structure analysis of the diastereomeric salt of (+)-3 and (-)-ephedrine allowed assignment of (+)-3 as the R configuration. The effects on fatty acid oxidation and glucose tolerance of the racemic and enantiomeric forms of 3, 4, and the CoA ester of 3 are presented. A postulated mechanism of action for the active enantiomer as an enantioselective, active-site-directed, irreversible inhibitor of carnitine palmitoyl transferase is suggested.
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Abstract
A series of alkylglycidic acid analogues and derivatives were synthesized and tested for their ability to inhibit long-chain fatty acid oxidation in vitro and to lower blood sugar in rats. The extent of inhibition of carnitine acyl transferase, the enzyme at the mitochondrial membrane necessary to transport long-chain fatty acids into the mitochondria for subsequent beta-oxidation, was determined for the series. Structure-activity relationships using in vitro inhibition of [1-14C]palmitic acid oxidation in rat hemidiaphragm muscle indicate that potent activity resides mainly in 2-alkyl (C12-C16) glycidates. Replacement of the oxirane ring with cyclopropyl, thiirane, or other rings diminishes activity, as does substitution of the glycidate ring at the 3-position. In vivo potency in the rat glucose tolerance test roughly parallels the hemidiaphragm results. The lead compound, methyl 2-tetradecylglycidate (8), is a potent hypoglycemic agent following oral administration to several animal species. The hypoglycemic analogues interfere with fatty acid oxidation by specific and irreversible inhibition of mitochondrial carnitine palmitoyl transferase-A.
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Katritzky AR, Johnson CD, Bean GP, Bellingham P, Brignell PJ, Ridgewell BJ, Shakir N, Tarhan O, Viney M, White AM. Zur elektrophilen Substitution an Sechsring-Heteroaromaten. Angew Chem Int Ed Engl 1967. [DOI: 10.1002/ange.19670791402] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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