1
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Wang J, Nakafuku KM, Ziff J, Gelin CF, Gholami H, Thompson AA, Karpowich NK, Limon L, Coate HR, Damm-Ganamet KL, Shih AY, Grant JC, Côte M, Mak PA, Pascual HA, Rives ML, Edwards JP, Venable JD, Venkatesan H, Shi Z, Allen SJ, Sharma S, Kung PP, Shireman BT. Development of small molecule inhibitors of natural killer group 2D receptor (NKG2D). Bioorg Med Chem Lett 2023; 96:129492. [PMID: 37778428 DOI: 10.1016/j.bmcl.2023.129492] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/25/2023] [Accepted: 09/28/2023] [Indexed: 10/03/2023]
Abstract
Natural killer group 2D (NKG2D) is a homodimeric activating immunoreceptor whose function is to detect and eliminate compromised cells upon binding to the NKG2D ligands (NKG2DL) major histocompatibility complex (MHC) molecules class I-related chain A (MICA) and B (MICB) and UL16 binding proteins (ULBP1-6). While typically present at low levels in healthy cells and tissue, NKG2DL expression can be induced by viral infection, cellular stress or transformation. Aberrant activity along the NKG2D/NKG2DL axis has been associated with autoimmune diseases due to the increased expression of NKG2D ligands in human disease tissue, making NKG2D inhibitors an attractive target for immunomodulation. Herein we describe the discovery and optimization of small molecule PPI (protein-protein interaction) inhibitors of NKG2D/NKG2DL. Rapid SAR was guided by structure-based drug design and accomplished by iterative singleton and parallel medicinal chemistry synthesis. These efforts resulted in the identification of several potent analogs (14, 21, 30, 45) with functional activity and improved LLE.
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Affiliation(s)
- Jocelyn Wang
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States.
| | - Kohki M Nakafuku
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States.
| | - Jeannie Ziff
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Christine F Gelin
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Hadi Gholami
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Aaron A Thompson
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Nathan K Karpowich
- Janssen Research & Development L.L.C., 1400 McKean Rd., Spring House, PA 19477, United States
| | - Luis Limon
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Heather R Coate
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Kelly L Damm-Ganamet
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Amy Y Shih
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Joanna C Grant
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Marjorie Côte
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Puiying A Mak
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Heather A Pascual
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Marie-Laure Rives
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - James P Edwards
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Jennifer D Venable
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Hariharan Venkatesan
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Zhicai Shi
- Janssen Research & Development L.L.C., 1400 McKean Rd., Spring House, PA 19477, United States
| | - Samantha J Allen
- Janssen Research & Development L.L.C., 1400 McKean Rd., Spring House, PA 19477, United States
| | - Sujata Sharma
- Janssen Research & Development L.L.C., 1400 McKean Rd., Spring House, PA 19477, United States
| | - Pei-Pei Kung
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
| | - Brock T Shireman
- Janssen Research & Development, L.L.C., 3210 Merryfield Row, San Diego, CA, 92121, United States
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2
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Gholami H, Cornali BM. Diastereoselective Spirocyclization: Entry to Spirocyclic Diketopiperazines. Org Lett 2023; 25:7822-7826. [PMID: 37857286 DOI: 10.1021/acs.orglett.3c03031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
We report a novel approach to access spirocyclic compounds containing a diketopiperazine (DKP) motif fused on a pyrrolidine ring. The shared spirocyclic carbon is at the ketone oxidation state, bearing two carbon-nitrogen bonds, one of which is introduced stereoselectively during the cyclization event. The reaction proceeds through an acid-catalyzed cyclization of a pendent chiral aminoamide unit onto a 2,3-dehydroproline amide moiety with up to >98:2 diastereoselectivity. We have demonstrated the generality of this methodology and its applicability to access chemically diverse DKP-containing structures. The extent of stereoinduction and how it varies according to the bulkiness of the substituent on the pendent aminoamide is demonstrated through a diverse substrate set. This methodology gives access to an underexplored spirocyclic diketopiperazine motif that may be useful in identifying new bioactive molecules.
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Affiliation(s)
- Hadi Gholami
- Janssen Research and Development, 3210 Merryfield Row, San Diego, California 92121, United States
| | - Brandon M Cornali
- Janssen Research and Development, 3210 Merryfield Row, San Diego, California 92121, United States
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3
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Thompson AA, Harbut MB, Kung PP, Karpowich NK, Branson JD, Grant JC, Hagan D, Pascual HA, Bai G, Zavareh RB, Coate HR, Collins BC, Côte M, Gelin CF, Damm-Ganamet KL, Gholami H, Huff AR, Limon L, Lumb KJ, Mak PA, Nakafuku KM, Price EV, Shih AY, Tootoonchi M, Vellore NA, Wang J, Wei N, Ziff J, Berger SB, Edwards JP, Gardet A, Sun S, Towne JE, Venable JD, Shi Z, Venkatesan H, Rives ML, Sharma S, Shireman BT, Allen SJ. Identification of small-molecule protein-protein interaction inhibitors for NKG2D. Proc Natl Acad Sci U S A 2023; 120:e2216342120. [PMID: 37098070 PMCID: PMC10160951 DOI: 10.1073/pnas.2216342120] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 03/10/2023] [Indexed: 04/26/2023] Open
Abstract
NKG2D (natural-killer group 2, member D) is a homodimeric transmembrane receptor that plays an important role in NK, γδ+, and CD8+ T cell-mediated immune responses to environmental stressors such as viral or bacterial infections and oxidative stress. However, aberrant NKG2D signaling has also been associated with chronic inflammatory and autoimmune diseases, and as such NKG2D is thought to be an attractive target for immune intervention. Here, we describe a comprehensive small-molecule hit identification strategy and two distinct series of protein-protein interaction inhibitors of NKG2D. Although the hits are chemically distinct, they share a unique allosteric mechanism of disrupting ligand binding by accessing a cryptic pocket and causing the two monomers of the NKG2D dimer to open apart and twist relative to one another. Leveraging a suite of biochemical and cell-based assays coupled with structure-based drug design, we established tractable structure-activity relationships with one of the chemical series and successfully improved both the potency and physicochemical properties. Together, we demonstrate that it is possible, albeit challenging, to disrupt the interaction between NKG2D and multiple protein ligands with a single molecule through allosteric modulation of the NKG2D receptor dimer/ligand interface.
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Affiliation(s)
- Aaron A. Thompson
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Michael B. Harbut
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Pei-Pei Kung
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Nathan K. Karpowich
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Jeffrey D. Branson
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Joanna C. Grant
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Deborah Hagan
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Heather A. Pascual
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Guoyun Bai
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | | | - Heather R. Coate
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Bernard C. Collins
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Marjorie Côte
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Christine F. Gelin
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | | | - Hadi Gholami
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Adam R. Huff
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Luis Limon
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Kevin J. Lumb
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Puiying A. Mak
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Kohki M. Nakafuku
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Edmund V. Price
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Amy Y. Shih
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Mandana Tootoonchi
- Discovery Immunology, Janssen Research & Development, San Diego, CA92121
| | - Nadeem A. Vellore
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Jocelyn Wang
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Na Wei
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Jeannie Ziff
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Scott B. Berger
- Discovery Immunology, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - James P. Edwards
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Agnès Gardet
- Discovery Immunology, Janssen Research & Development, San Diego, CA92121
| | - Siquan Sun
- Discovery Immunology, Janssen Research & Development, San Diego, CA92121
| | - Jennifer E. Towne
- Discovery Immunology, Janssen Research & Development, San Diego, CA92121
| | | | - Zhicai Shi
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | | | - Marie-Laure Rives
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Sujata Sharma
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
| | - Brock T. Shireman
- Therapeutics Discovery, Janssen Research & Development, San Diego, CA92121
| | - Samantha J. Allen
- Therapeutics Discovery, Janssen Research & Development, Lower Gwynedd Township, PA19002
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Gholami H, Sun H. Toward automated algorithm configuration for distributed hybrid flow shop scheduling with multiprocessor tasks. Knowl Based Syst 2023. [DOI: 10.1016/j.knosys.2023.110309] [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: 01/22/2023]
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5
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Vazouras K, Gholami H, Margvelashvili-Malament M, Kim YJ, Finkelman M, Weber HP. An esthetic evaluation of different abutment materials in the anterior Maxilla: A randomized controlled clinical trial using a crossover design. J Prosthodont 2022; 31:673-680. [PMID: 35405771 DOI: 10.1111/jopr.13520] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 02/19/2021] [Accepted: 03/31/2022] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To assess the effect of implant abutment material and soft tissue thickness on the peri-implant soft tissue color using spectrophotometry and to evaluate gingival esthetics and patient satisfaction with three different abutments. MATERIALS AND METHODS Twenty-five patients with a missing maxillary tooth in the esthetic area received an endosseous implant using a two-stage protocol. Grey titanium, pink anodized titanium, and hybrid zirconia custom abutments were fabricated for each participant and inserted for one week with a cross-over design in a randomized manner. Color measurements were made using a spectrophotometer comparing midfacial peri-implant soft tissue and marginal gingiva of the contralateral tooth. CIE Lab color scale was employed following the formula: ΔE = [(∆L)2 +(∆a)2 +(∆b)2 ] ½ . PES scores were recorded, and patient satisfaction questionnaires were completed at each abutment change visit and at 1-year follow-up. Statistical analysis was performed using Friedman's test and the Wilcoxon signed-rank test with Bonferroni correction as well as the Mann-Whitney U test (α = 0.05). RESULTS Abutment material type significantly affected the ΔΕ values of the peri-implant mucosa when compared to the contralateral teeth. At baseline, the highest ΔΕ means ± standard deviation (SD) values were obtained with grey titanium (11.25 ±2.98), followed by pink anodized titanium (9.90 ±2.51), and zirconia abutments (6.46 ±1.43). Differences were statistically significant irrespective of soft tissue thickness. The highest PES values were obtained with zirconia abutments (10.88 ±0.88), followed by pink anodized titanium (10.12 ±1.13) and the lowest with grey titanium (9.68 ±1.41). PES differences were significant only for the thin soft tissue group. Regarding patient satisfaction, VAS scores for the pink anodized and zirconia hybrid abutment groups were higher than the grey titanium group for each question. CONCLUSION The color difference between soft tissues around teeth and implants was significant in all groups regardless of tissue thickness. The hybrid zirconia abutments resulted in the least color difference, followed by pink anodized and grey titanium. Significantly different PES values were recorded only for the thin tissue group. There was no significant difference in patient satisfaction between zirconia and pink anodized abutments at the 1-year follow up. Pink anodized abutments represent a good esthetic alternative to zirconia hybrid abutments especially in mechanically challenging situations. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Konstantinos Vazouras
- Assistant Professor and Program Director of Post-graduate Prosthodontics, Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA
| | - Hadi Gholami
- Assistant Professor and Program Director of Post-graduate Prosthodontics, Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA
| | - Mariam Margvelashvili-Malament
- Assistant Professor and Program Director of Post-graduate Prosthodontics, Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA
| | - Yong Jeong Kim
- Associate Professor, Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA
| | - Matthew Finkelman
- Associate Professor, Department of Public Health and Community Service, Tufts School of Dental Medicine, Boston, MA
| | - Hans-Peter Weber
- Professor Emeritus, Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA
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6
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Ashtekar KD, Gholami H, Moemeni M, Chakraborty A, Kiiskila L, Ding X, Toma E, Rahn C, Borhan B. A Mechanistically Inspired Halenium Ion Initiated Spiroketalization: Entry to Mono- and Dibromospiroketals. Angew Chem Int Ed Engl 2022; 61:e202115173. [PMID: 34881491 PMCID: PMC9254888 DOI: 10.1002/anie.202115173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/08/2021] [Indexed: 11/09/2022]
Abstract
Employing halenium affinity (HalA) as a guiding tool, the weak nucleophilic character of alkyl ketones was modulated by the templating effect of a tethered 2-tetrahydropyranyl(THP)-protected alcohol towards realizing a bromenium ion initiated spiroketalization cascade. Addition of ethanol aided an early termination of the cascade by scavenging the THP group after the halofunctionalization stage, furnishing monobromospiroketals. Alternatively, exclusion of ethanol from the reaction mixture biased the transient oxocarbenium towards α-deprotonation that precedes a second bromofunctionalization event thus, furnishing dibrominated spiroketals. The regio- and stereoselectivity exploited in the current methodology provides a novel and rapid access to the dibrominated spiroketal motifs exhibited by several natural products.
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Affiliation(s)
| | | | - Mehdi Moemeni
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Ankush Chakraborty
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Lindsey Kiiskila
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Xinliang Ding
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Edmond Toma
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Christopher Rahn
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
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7
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Ashtekar KD, Gholami H, Moemeni M, Chakraborty A, Kiiskila L, Ding X, Toma E, Rahn C, Borhan B. A Mechanistically Inspired Halenium Ion Initiated Spiroketalization: Entry to Mono‐ and Dibromospiroketals. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115173] [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: 11/09/2022]
Affiliation(s)
- Kumar Dilip Ashtekar
- Cancer Biology Institute Yale School of Medicine West Haven Connecticut 06516 USA
| | - Hadi Gholami
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Mehdi Moemeni
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Ankush Chakraborty
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Lindsey Kiiskila
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Xinliang Ding
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Edmond Toma
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Christopher Rahn
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
| | - Babak Borhan
- Department of Chemistry Michigan State University East Lansing MI 48824 USA
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8
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Santos EM, Sheng W, Esmatpour Salmani R, Tahmasebi Nick S, Ghanbarpour A, Gholami H, Vasileiou C, Geiger JH, Borhan B. Design of Large Stokes Shift Fluorescent Proteins Based on Excited State Proton Transfer of an Engineered Photobase. J Am Chem Soc 2021; 143:15091-15102. [PMID: 34516091 DOI: 10.1021/jacs.1c05039] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The incredible potential for fluorescent proteins to revolutionize biology has inspired the development of a variety of design strategies to address an equally broad range of photophysical characteristics, depending on potential applications. Of these, fluorescent proteins that simultaneously exhibit high quantum yield, red-shifted emission, and wide separation between excitation and emission wavelengths (Large Stokes Shift, LSS) are rare. The pursuit of LSS systems has led to the formation of a complex, obtained from the marriage of a rationally engineered protein (human cellular retinol binding protein II, hCRBPII) and different fluorogenic molecules, capable of supporting photobase activity. The large increase in basicity upon photoexcitation leads to protonation of the fluorophore in the excited state, dramatically red-shifting its emission, leading to an LSS protein/fluorophore complex. Essential for selective photobase activity is the intimate involvement of the target protein structure and sequence that enables Excited State Proton Transfer (ESPT). The potential power and usefulness of the strategy was demonstrated in live cell imaging of human cell lines.
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Affiliation(s)
- Elizabeth M Santos
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - Wei Sheng
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | | | - Setare Tahmasebi Nick
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - Alireza Ghanbarpour
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - Hadi Gholami
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - Chrysoula Vasileiou
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - James H Geiger
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Michigan State University, Department of Chemistry, East Lansing, Michigan 48824, United States
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9
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Gholami H, Binazadeh T. Fixed-time control of nonlinear discrete-time systems with time-varying delay and uncertain parameters: state and output feedback approaches. Soft comput 2021. [DOI: 10.1007/s00500-021-06023-6] [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: 11/29/2022]
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10
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Abstract
The first total synthesis of the trimethyl ester of kadcoccinic acid A is described. The central structural element of our synthesis is a cyclopentenone motif that allows the assembly of the natural product skeleton. A gold(I)-catalyzed cyclization of an enynyl acetate led to efficient construction of the cyclopentenone scaffold. In this step, optimization studies revealed that the stereochemistry of the enynyl acetate dictates regioisomeric cyclopentenone formation. The synthesis further highlights an efficient copper-mediated conjugate addition, merged with a gold(I)-catalyzed Conia-ene reaction to connect the two fragments, thereby forging the D-ring of the natural product. The synthetic strategy reported herein can provide a general platform to access the skeleton of other members of this family of natural products.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Guoting Zhang
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Hadi Gholami
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Daniel Zell
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
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11
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Trost BM, Jiao Z, Gholami H. Palladium-catalyzed asymmetric allylic alkylation (AAA) with alkyl sulfones as nucleophiles. Chem Sci 2021; 12:10532-10537. [PMID: 34447546 PMCID: PMC8356815 DOI: 10.1039/d1sc02599f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/01/2021] [Indexed: 01/14/2023] Open
Abstract
An efficient palladium-catalyzed AAA reaction with a simple α-sulfonyl carbon anion as nucleophiles is presented for the first time. Allyl fluorides are used as superior precursors for the generation of π-allyl complexes that upon ionization liberate fluoride anions for activation of silylated nucleophiles. With the unique bidentate diamidophosphite ligand ligated palladium as catalyst, the in situ generated α-sulfonyl carbon anion was quickly captured by the allylic intermediates, affording a series of chiral homo-allylic sulfones with high efficiency and selectivity. This work provides a mild in situ desilylation strategy to reveal nucleophilic carbon centers that could be used to overcome the pKa limitation of “hard” nucleophiles in enantioselective transformations. A variety of “hard” α-sulfonyl carbanions of aryl, heteroaryl and alkyl sulfones were successfully employed as nucleophiles in palladium-catalyzed asymmetric allylic alkylation with excellent enantioselectivities.![]()
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Affiliation(s)
- Barry M Trost
- Departmentof Chemistry, Stanford University Stanford CA 94305-5080 USA
| | - Zhiwei Jiao
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
| | - Hadi Gholami
- Departmentof Chemistry, Stanford University Stanford CA 94305-5080 USA
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12
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Gholami H, Chakraborty D, Zhang J, Borhan B. Absolute Stereochemical Determination of Organic Molecules through Induction of Helicity in Host-Guest Complexes. Acc Chem Res 2021; 54:654-667. [PMID: 33428849 DOI: 10.1021/acs.accounts.0c00650] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Stereochemistry is a fundamental molecular property with important ramifications for structure, function, and activity of organic molecules. The basic building blocks of living organisms (amino acids and sugars) exhibit a precisely selected set of molecular handedness that has evolved over millions of years. The absolute stereochemistry of these building blocks is manifested in the structure and function of the cell machinery (e.g., enzymes, proteins, etc.), which are essential components of life. In the many chemical subdisciplines, molecular stereochemistry is exceedingly important and is often a strong determinant of structure and function. Besides its biological implications, the centrally important role of stereochemistry in many disciplines of chemistry and related fields has led to tremendous effort and activity, highlighted by the success in stereoselective syntheses of a host of functionalities. In the present climate, it is often the difficulty of assigning absolute stereochemistry as opposed to synthesis, which has become a nontrivial challenge, requiring the attention of the community. There will not be a general solution to this problem, as each system will have its own unique requirements and challenges; however, the need for rapid, routine, and microscale analysis is apparent. This is especially true with parallel and high-throughput arrays for screening conditions and catalysts, generating a large number of samples that require analysis.In this Account, we summarize our contribution to this field through the development of molecular receptors for sensing molecular asymmetry. These methodologies strive to unambiguously assign the absolute configuration of asymmetric center(s). To accomplish this task, our laboratory has designed a variety of host molecules, bearing various binding elements, to form stable complexes with chiral molecules (guests). During this complexation event, the stereochemistry of a target molecule induces a supramolecular chirality (i.e., helicity) within the host system. The design of the host system is such that the helicity of the host/guest complex can be observed and assigned via Exciton Coupled Circular Dichroism (ECCD), a nonempirical technique for identifying handedness, which is correlated back to the absolute stereochemistry of the bound chiral molecule. Taking advantage of the high sensitivity of chiroptical techniques (in terms of the required amount of sample for analysis) and fast response time, these methodologies offer a microscale, rapid, and nonempirical solution for assignment of absolute stereochemistry.The first part of this Account describes application of porphyrin tweezers as reporters of chirality for the absolute stereochemical determination of various classes of organic molecules. This methodology is suitable to report the absolute configuration of organic molecules that contain two binding elements (nitrogen or oxygen based functionalities). In the second part, host systems that do not require two sites of attachment to form ECCD active complexes will be described. This enables the absolute stereochemical assignment of challenging chiral molecules with functional groups lacking routine techniques for analysis.
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Affiliation(s)
- Hadi Gholami
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Debarshi Chakraborty
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Jun Zhang
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
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Moradi S, Gholami H, Karami C, Farhadian N, Balaei F, Ansari M, Shahlaei M. A study on the protease activity and structure of pepsin in the presence of atenolol and diltiazem. Int J Biol Macromol 2020; 165:2855-2868. [PMID: 33096169 DOI: 10.1016/j.ijbiomac.2020.10.118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/04/2020] [Accepted: 10/14/2020] [Indexed: 11/18/2022]
Abstract
Pepsin, as the main protease of the stomach, plays an important role in the digestion of food proteins into smaller peptides and performs about 20% of the digestive function. The role of pepsin in the development of gastrointestinal ulcers has also been studied for many years. Edible drugs that enter the body through the gastrointestinal tract will interact with this enzyme as one of the first targets. Continuous and long-term usage of some drugs will cause chronic contact of the drug with this protein, and as a result, the structure and function of pepsin may be affected. Therefore, the possible effect of atenolol and diltiazem on the structure and activity of pepsin was studied. The interaction of drugs with pepsin was evaluated using various experimental methods including UV-Visible spectroscopy, fluorescence spectroscopy, FTIR and enzymatic activity along with computational approaches. It was showed that after binding of atenolol and diltiazem to pepsin, the inherent fluorescence of the protein is quenched. Determination of the thermodynamic parameters of interactions between atenolol and diltiazem with pepsin indicates that the major forces in the formation of the protein-drug complexes are hydrophobic forces and also atenolol has a stronger protein bonding than diltiazem. Additional tests also show that the protease activity of pepsin, decreases and increases in the presence of atenolol and diltiazem, respectively. Investigation of the FTIR spectrum of the protein in the presence and absence of atenolol and diltiazem show that in the presence of atenolol the structure of protein has slightly changed. Molecular modeling studies, in agreement with the experimental results, confirm the binding of atenolol and diltiazem to the enzyme pepsin and show that the drugs are bind close to the active site of the enzyme. Finally, from experimental and computational results, it can be concluded that atenolol and diltiazem interact with the pepsin and change its structure and protease activity.
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Affiliation(s)
- Sajad Moradi
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hadi Gholami
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Changiz Karami
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Negin Farhadian
- Substance Abuse Prevention Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Fatemeh Balaei
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohabbat Ansari
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohsen Shahlaei
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Chakraborty D, Gholami H, Sarkar A, Joyce LA, Jackson JE, Borhan B. A chiroptical approach for the absolute stereochemical determination of P-stereogenic centers. Chem Sci 2020; 12:1750-1755. [PMID: 34163935 PMCID: PMC8179206 DOI: 10.1039/d0sc02940h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple chiroptical solution for the absolute stereochemical determination for asymmetric phosphorus V stereocenters is presented. Strong coordination of the phosphorus oxide with the Zn-metallo center of the racemic host Zn-MAPOL 2 leads to an induced axial chirality of the host, yielding a strong ECCD signal. A mnemonic is proposed to correlate the asymmetry of the guest molecule with the observed ECCD signal. A simple chiroptical solution for the absolute stereochemical determination for asymmetric phosphorus V stereocenters is presented.![]()
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Affiliation(s)
| | - Hadi Gholami
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | - Aritra Sarkar
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | - Leo A Joyce
- Department of Process Research and Development, Merck and Co, Inc. Rahway NJ 07065 USA
| | - James E Jackson
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | - Babak Borhan
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
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Vazouras K, Souza AB, Gholami H, Papaspyridakos P, Pagni S, Weber H. Effect of time in function on the predictability of short dental implants (≤6 mm): A meta‐analysis. J Oral Rehabil 2020; 47:403-415. [DOI: 10.1111/joor.12925] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 11/01/2019] [Accepted: 12/09/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Konstantinos Vazouras
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Andre Barbisan Souza
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Hadi Gholami
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Panos Papaspyridakos
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Sarah Pagni
- Department of Public Health and Community Service Tufts University School of Dental Medicine Boston MA USA
| | - Hans‐Peter Weber
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
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Gholami H, Kulshrestha A, Favor OK, Staples RJ, Borhan B. Total Synthesis of (-)-Salinosporamide A via a Late Stage C-H Insertion. Angew Chem Int Ed Engl 2019; 58:10110-10113. [PMID: 30887693 DOI: 10.1002/anie.201900340] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 01/09/2019] [Indexed: 01/24/2023]
Abstract
The synthesis of (-)-salinosporamide A, a proteasome inhibitor, is described. The synthesis highlights the assembly of a densely decorated pyrrolidinone core via an aza-Payne/hydroamination sequence. Central to the success of the synthesis is a late-stage C-H insertion reaction to functionalize a sterically encumbered secondary carbon. The latter functionalization leads to an enabling transformation where most of the prototypical strategies failed.
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Affiliation(s)
- Hadi Gholami
- Department of Chemistry, Michigan State University, E. Lansing, MI, 48824, USA
| | - Aman Kulshrestha
- Department of Chemistry, Michigan State University, E. Lansing, MI, 48824, USA
| | - Olivia K Favor
- Department of Chemistry, Michigan State University, E. Lansing, MI, 48824, USA
| | - Richard J Staples
- Department of Chemistry, Michigan State University, E. Lansing, MI, 48824, USA
| | - Babak Borhan
- Department of Chemistry, Michigan State University, E. Lansing, MI, 48824, USA
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Gholami H, Kulshrestha A, Favor OK, Staples RJ, Borhan B. Rücktitelbild: Total Synthesis of (−)‐Salinosporamide A via a Late Stage C−H Insertion (Angew. Chem. 30/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907852] [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: 11/06/2022]
Affiliation(s)
- Hadi Gholami
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Aman Kulshrestha
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Olivia K. Favor
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Richard J. Staples
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Babak Borhan
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
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Gholami H, Kulshrestha A, Favor OK, Staples RJ, Borhan B. Back Cover: Total Synthesis of (−)‐Salinosporamide A via a Late Stage C−H Insertion (Angew. Chem. Int. Ed. 30/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201907852] [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: 11/05/2022]
Affiliation(s)
- Hadi Gholami
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Aman Kulshrestha
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Olivia K. Favor
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Richard J. Staples
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Babak Borhan
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
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Abstract
The first palladium-catalyzed asymmetric allylic trifluoromethylation is disclosed. The methodology evokes a fundamental principle by which the synergistic interplay of a leaving group and its subsequent activation of the nucleophilic trifluoromethyl group enabled the reaction. Allyl fluorides have been shown to be superior precursors for generation of π-allyl complexes, which lead to trifluoromethylated products with high selectivities and functional group tolerance. This study highlights the unique role of a bidentate diamidophosphite ligand class in palladium-catalyzed reactions that allow a challenging transformation to proceed.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
| | - Hadi Gholami
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
| | - Daniel Zell
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
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Gholami H, Kulshrestha A, Favor OK, Staples RJ, Borhan B. Total Synthesis of (−)‐Salinosporamide A via a Late Stage C−H Insertion. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hadi Gholami
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Aman Kulshrestha
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Olivia K. Favor
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Richard J. Staples
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
| | - Babak Borhan
- Department of ChemistryMichigan State University E. Lansing MI 48824 USA
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Wismeijer D, Joda T, Flügge T, Fokas G, Tahmaseb A, Bechelli D, Bohner L, Bornstein M, Burgoyne A, Caram S, Carmichael R, Chen C, Coucke W, Derksen W, Donos N, El Kholy K, Evans C, Fehmer V, Fickl S, Fragola G, Gimenez Gonzales B, Gholami H, Hashim D, Hui Y, Kökat A, Vazouras K, Kühl S, Lanis A, Leesungbok R, Meer J, Liu Z, Sato T, De Souza A, Scarfe WC, Tosta M, Zyl P, Vach K, Vaughn V, Vucetic M, Wang P, Wen B, Wu V. Group 5 ITI Consensus Report: Digital technologies. Clin Oral Implants Res 2018; 29 Suppl 16:436-442. [DOI: 10.1111/clr.13309] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 05/29/2018] [Accepted: 05/31/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Daniel Wismeijer
- Academic Center for Dentistry Amsterdam Amsterdam The Netherlands
| | - Tim Joda
- Department of Dental Medicine University of Bern Bern Switzerland
| | - Tabea Flügge
- Department of Oral and Maxillofacial Surgery University of Freiburg Freiburg Germany
| | - George Fokas
- Department Implant DentistryUniversity of Hong Kong Hong Kong
| | - Ali Tahmaseb
- Academic Center for Dentistry Amsterdam Amsterdam The Netherlands
| | | | | | | | | | | | | | | | | | - Wiebe Derksen
- Academic Center for Dentistry Amsterdam Amsterdam The Netherlands
| | | | | | | | | | | | | | | | | | | | - Yu Hui
- Department of Oral SurgerySchool of Dental MedicineUniversity of Belgrade Belgrade Serbia
| | | | | | | | | | | | - Joerd Meer
- University of Groningen Groningen The Netherlands
| | - Zhonghao Liu
- School of StomatologyBinzhou Medical University Binzhou China
| | | | | | | | | | - Paul Zyl
- Private Practice Capetown South Africa
| | - Kirstin Vach
- Department of Oral and Maxillofacial Surgery University of Freiburg Freiburg Germany
| | - Vida Vaughn
- University of Louisville Louisville Kentucky
| | - Milan Vucetic
- Faculty of Dental Medicine University of Belgrade Belgrade Serbia
| | - Ping Wang
- Academic Center for Dentistry Amsterdam Amsterdam The Netherlands
| | - Bo Wen
- Peking University School of Stomatology Beijing China
| | - Vivian Wu
- Academic Center for Dentistry Amsterdam Amsterdam The Netherlands
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Papaspyridakos P, Souza A, Vazouras K, Gholami H, Pagni S, Weber H. Survival rates of short dental implants (≤6 mm) compared with implants longer than 6 mm in posterior jaw areas: A meta‐analysis. Clin Oral Implants Res 2018; 29 Suppl 16:8-20. [DOI: 10.1111/clr.13289] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 01/22/2023]
Affiliation(s)
- Panos Papaspyridakos
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Andre Souza
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Konstantinos Vazouras
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Hadi Gholami
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
| | - Sarah Pagni
- Department of Public Health and Community ServiceTufts University School of Dental Medicine Boston MA USA
| | - Hans‐Peter Weber
- Department of Prosthodontics Tufts University School of Dental Medicine Boston MA USA
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Jung RE, Al-Nawas B, Araujo M, Avila-Ortiz G, Barter S, Brodala N, Chappuis V, Chen B, De Souza A, Almeida RF, Fickl S, Finelle G, Ganeles J, Gholami H, Hammerle C, Jensen S, Jokstad A, Katsuyama H, Kleinheinz J, Kunavisarut C, Mardas N, Monje A, Papaspyridakos P, Payer M, Schiegnitz E, Smeets R, Stefanini M, Ten Bruggenkate C, Vazouras K, Weber HP, Weingart D, Windisch P. Group 1 ITI Consensus Report: The influence of implant length and design and medications on clinical and patient-reported outcomes. Clin Oral Implants Res 2018; 29 Suppl 16:69-77. [PMID: 30328189 DOI: 10.1111/clr.13342] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 05/22/2018] [Accepted: 05/26/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVES The aim of Working Group 1 was to address the influence of different local (implant length, diameter, and design) and systemic (medications) factors on clinical, radiographic, and patient-reported outcomes in implant dentistry. Focused questions on (a) short posterior dental implants (≤6 mm), (b) narrow diameter implants, (c) implant design (tapered compared to a non-tapered implant design), and (d) medication-related dental implant failures were addressed. MATERIALS AND METHODS Four systematic reviews were prepared in advance of the Consensus Conference and were discussed among the participants of Group 1. Consensus statements, clinical recommendations, and recommendations for future research were based on structured group discussions until consensus was reached among the entire expert Group 1. The statements were then presented and accepted following further discussion and modifications as required by the plenary. RESULTS Short implants (≤6 mm) revealed a survival rate ranging from 86.7% to 100%, whereas standard implant survival rate ranged from 95% to 100% with a follow-up from 1 to 5 years. Short implants demonstrated a higher variability and a higher Risk Ratio [RR: 1.24 (95% CI: 0.63, 2.44, p = 0.54)] for failure compared to standard implants. Narrow diameter implants (NDI) have been classified into three categories: Category 1: Implants with a diameter of <2.5 mm ("Mini-implants"); Category 2: Implants with a diameter of 2.5 mm to <3.3 mm; Category 3: Implants with a diameter of 3.3 mm to 3.5 mm. Mean survival rates were 94.7 ± 5%, 97.3 ± 5% and 97.7 ± 2.3% for category 1, 2 and 3. Tapered versus non-tapered implants demonstrated only insignificant differences regarding clinical, radiographic, and patient-reported outcomes. The intake of certain selective serotonin reuptake inhibitors and proton pump inhibitors is associated with a statistically significant increased implant failure rate. The intake of bisphosphonates related to the treatment of osteoporosis was not associated with an increased implant failure rate. CONCLUSIONS It is concluded that short implants (≤6 mm) are a valid option in situations of reduced bone height to avoid possible morbidity associated with augmentation procedures; however, they reveal a higher variability and lower predictability in survival rates. Narrow diameter implants with diameters of 2.5 mm and more demonstrated no difference in implant survival rates compared to standard diameter implants. In contrast, it is concluded that narrow diameter implants with diameters of less than 2.5 mm exhibited lower survival rates compared to standard diameter implants. It is further concluded that there are no differences between tapered versus non-tapered dental implants. Certain medications such as selective serotonin reuptake inhibitors and proton pump inhibitors showed an association with a higher implant failure rate.
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Affiliation(s)
- Ronald E Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Mauricio Araujo
- Department of Dentistry, Universidade Estadual de Maringa, Maringa, Brazil
| | - Gustavo Avila-Ortiz
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa
| | - Stephen Barter
- Centre for Oral Clinical Research, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | | | - Vivianne Chappuis
- Department of Oral Surgery and Stomatology, University of Bern, Bern, Switzerland
| | - Bo Chen
- Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Andre De Souza
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts
| | | | - Stefan Fickl
- Department of Periodontology, University of Würzburg, Germany and Private Office, Nuremberg/Fuerth, Germany
| | | | - Jeffrey Ganeles
- South Florida Center for Periodontics and Implant Dentistry, Boca Raton, Florida
- Nova Southeastern University, Fort Lauderdale, Florida
| | - Hadi Gholami
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts
| | - Christoph Hammerle
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland
| | - Simon Jensen
- Department of Oral and Maxillofacial Surgery, Copenhagen University Hospital, Copenhagen, Denmark
| | - Asbjørn Jokstad
- Clinical Dentistry, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway
- Prosthodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Hideaki Katsuyama
- Private Practice, MM Dental Clinic, Tokyo, Japan
- Tokyo Medical and Dental University, Tokyo, Japan
| | - Johannes Kleinheinz
- Department of Cranio-Maxillofacial Surgery, University Hospital Münster, Münster, Germany
| | - Chatchai Kunavisarut
- Advanced General Dentistry Department, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Nikos Mardas
- Adult Oral Health-Periodontology, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Alberto Monje
- Department of Oral Surgery and Stomatology, University of Bern, Bern, Switzerland
- Department of Periodontology, International University of Catalonia, Barcelona, Spain
| | - Panos Papaspyridakos
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts
| | - Michael Payer
- Department of Oral Surgery and Radiology, Dental School, Medical University of Graz, Graz, Austria
| | - Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery, Plastic Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | | | - Konstantinos Vazouras
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts
| | - Hans-Peter Weber
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts
| | - Dieter Weingart
- Klinik für Mund-, Kiefer- und Gesichtschirurgie, Plastisch-ästhetische Operationen, Zentrum für Implantologie, Klinikum Stuttgart, Katharinen Hospital, Stuttgart, Germany
| | - Péter Windisch
- Department of Periodontology, Semmelweis Egyetem, Budapest, Hungary
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Hadi Gholami
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
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Yi Y, Gholami H, Morrow MG, Borhan B. XtalFluor-E® mediated proto-functionalization of N-vinyl amides: access to N-acetyl N,O-acetals. Org Biomol Chem 2017; 15:9570-9574. [PMID: 29106419 DOI: 10.1039/c7ob02283b] [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: 01/27/2023]
Abstract
XtalFluor-E® has been extensively used in a broad range of reactions in the past few years. Here we report its use with protic nucleophiles in a catalytic manner for the in situ generation of protons that lead to the proto-functionalization of activated olefins. Utilizing the latter protocol, proto etherification of enamides gives rise to N,O-acetals in nearly quantitative yields.
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Affiliation(s)
- Y Yi
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
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Zhang J, Sheng W, Gholami H, Nehira T, Borhan B. Di(1-naphthyl) methanol ester of carboxylic acids for absolute stereochemical determination. Chirality 2017; 30:141-146. [PMID: 29114933 DOI: 10.1002/chir.22775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 06/26/2017] [Revised: 09/05/2017] [Accepted: 09/08/2017] [Indexed: 11/10/2022]
Abstract
The absolute stereochemistry of chiral carboxylic acids is determined as a di(1-naphthyl)methanol ester derivative. Computational scoring of conformations favoring either P or M helicity of the naphthyl groups, capable of exciton-coupled circular dichroic coupling, leads to a predicted stereochemistry for the derivatized carboxylic acids.
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Affiliation(s)
- Jun Zhang
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Wei Sheng
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Hadi Gholami
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Hiroshima, Japan
| | - Babak Borhan
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
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Gholami H, Zhang J, Anyika M, Borhan B. Absolute Stereochemical Determination of Asymmetric Sulfoxides via Central to Axial Induction of Chirality. Org Lett 2017; 19:1722-1725. [PMID: 28287267 DOI: 10.1021/acs.orglett.7b00495] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The absolute configuration of chiral sulfoxides is determined by means of host-guest complexation that leads to the induction of axial chirality in an achiral host. The central to axial induction of helicity is rationalized by a simple recognition of the relative length and size of the substituents attached to the S-center. This technique is used to determine the absolute configuration of chiral sulfoxides, requiring micrograms of sample, without the need for prefunctionalization.
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Affiliation(s)
- Hadi Gholami
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Jun Zhang
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Mercy Anyika
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
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28
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Zhang J, Gholami H, Ding X, Chun M, Vasileiou C, Nehira T, Borhan B. Computationally Aided Absolute Stereochemical Determination of Enantioenriched Amines. Org Lett 2017; 19:1362-1365. [DOI: 10.1021/acs.orglett.7b00246] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Zhang
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Hadi Gholami
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Xinliang Ding
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Minji Chun
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Chrysoula Vasileiou
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Tatsuo Nehira
- Graduate
School of Integrated Arts and Sciences, Hiroshima University, Higashi, Hiroshima 739-8521, Japan
| | - Babak Borhan
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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29
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Eslamian L, Gholami H, Mortazavi SAR, Soheilifar S. Effect of 5% benzocaine gel on relieving pain caused by fixed orthodontic appliance activation. A double-blind randomized controlled trial. Orthod Craniofac Res 2016; 19:190-197. [PMID: 27659276 DOI: 10.1111/ocr.12130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2016] [Indexed: 11/28/2022]
Abstract
AIM To compare the effectiveness of 5% benzocaine gel and placebo gel on reducing pain caused by fixed orthodontic appliance activation. SETTING AND SAMPLE POPULATION Thirty subjects (15-25 years) undergoing fixed orthodontics. METHODS AND MATERIALS A randomized, double-blind, placebo-controlled and cross-over clinical trial study was conducted. Subjects were asked to apply a placebo gel and 5% benzocaine gel, exchangeable in two consecutive appointments, twice a day for 3 days and mark their level of pain on a VAS scale. The pain severity was evaluated by means of Mann-Whitney U-test for comparing two gel groups, Kruskal-Wallis nonparametric test for overall differences and post hoc test of Dunnett for paired multiple comparisons. p-value was assigned <0.05. RESULTS The overall mean value of pain intensity for benzocaine and placebo gels was 0.89 and 1.15, respectively. The Mann-Whitney U-test indicated that there was no significant difference between overall pain in both groups (mean difference = 0.258 p ˂ 0.21). For both groups, pain intensity was significantly lower at 2, 6 and 24 h compared with pain experienced at days 2, 3 and 7. CONCLUSION Benzocaine gel caused a decrease in pain perception at 2 h compared with placebo gel. Peak pain intensity was at 2 h for placebo gel and at 6 h for benzocaine gel, followed by a decline in pain perception from that point to day 7 for both gels.
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Affiliation(s)
- L Eslamian
- Professor of Orthodontics, Dentofacial Deformities Research Center, Research Institute of Dental Sciences & Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - H Gholami
- DDS, Dr med dent, MAS ITI Scholar at Tufts University, School of dental medicine
| | - S A R Mortazavi
- Pharmacy Faculty, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - S Soheilifar
- Orthodontic Department, School of Dentistry, Hamedan University of Medical Sciences, Hamedan, Iran.
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30
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Ashtekar KD, Ding X, Toma E, Sheng W, Gholami H, Rahn C, Reed P, Borhan B. Mechanistically Inspired Route toward Hexahydro-2H-chromenes via Consecutive [4 + 2] Cycloadditions. Org Lett 2016; 18:3976-9. [PMID: 27487461 DOI: 10.1021/acs.orglett.6b01742] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Utilizing two robust C-C bond-forming reactions, the Baylis-Hillman reaction and the Diels-Alder reaction, we report a highly enantio-, regio-, and diastereoselective synthesis of hexahydro-2H-chromenes via two sequential [4 + 2] cycloadditions. These tandem and formal cycloadditions have also been performed as a "one-pot" sequence to access the corresponding heterocycles constituting up to five contiguous stereocenters in excellent yields and stereoselectivity.
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Affiliation(s)
- Kumar Dilip Ashtekar
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Xinliang Ding
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Edmond Toma
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Wei Sheng
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Hadi Gholami
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Christopher Rahn
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Paul Reed
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
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31
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Zaboli P, Hashemi-Meshkini A, Varmaghani M, Gholami H, Vazirian I, Zekri HS, Eslamitabar S, Kebriaeezadeh A. Pharmaceutical laws and regulations in Iran: An overview. J Res Pharm Pract 2016; 5:155-61. [PMID: 27512704 PMCID: PMC4966232 DOI: 10.4103/2279-042x.185709] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The pharmaceutical legal framework is a very important infrastructure in achieving predefined goals in pharmaceutical sector: Accessibility, quality, and rational use of medicine. This study aims to review the current pharmaceutical sector-related legal provisions in Iran where the Food and Drug Organization (FDO) is in charge of regulating all issues related to the pharmaceutical sector. The main laws and regulations enacted by parliament and cabinet and even internal regulations enacted by the Ministry of Health or Iran FDO are reviewed. Different laws and regulations are categorized according to the main goals of Iran national drug policy.
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Affiliation(s)
- Pardis Zaboli
- Pharmaceutical Management and Economics Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hashemi-Meshkini
- Department of Pharmacoeconomics and Pharmaceutical Administration, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Varmaghani
- Department of Pharmacoeconomics and Pharmaceutical Administration, Tehran University of Medical Sciences, Tehran, Iran
| | - Hadi Gholami
- Department of Pharmaceutics, Tehran University of Medical Sciences, Tehran, Iran
| | - Iman Vazirian
- Department of Pharmaceutics, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Shahriar Eslamitabar
- Department of Pharmaceutics, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Kebriaeezadeh
- Pharmaceutical Management and Economics Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacoeconomics and Pharmaceutical Administration, Tehran University of Medical Sciences, Tehran, Iran
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32
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Gholami H, Anyika M, Zhang J, Vasileiou C, Borhan B. Host–Guest Assembly of a Molecular Reporter with Chiral Cyanohydrins for Assignment of Absolute Stereochemistry. Chemistry 2016; 22:9235-9. [DOI: 10.1002/chem.201601064] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Hadi Gholami
- Department of Chemistry Michigan State University E. Lansing MI 48824 USA
| | - Mercy Anyika
- Department of Chemistry Michigan State University E. Lansing MI 48824 USA
| | - Jun Zhang
- Department of Chemistry Michigan State University E. Lansing MI 48824 USA
| | | | - Babak Borhan
- Department of Chemistry Michigan State University E. Lansing MI 48824 USA
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33
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Eslamian L, Borzabadi-Farahani A, Gholami H. The effect of benzocaine and ketoprofen gels on pain during fixed orthodontic appliance treatment: a randomised, double-blind, crossover trial. Aust Orthod J 2016; 32:64-72. [PMID: 27468593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIMS To compare the analgesic effect of topical benzocaine (5%) and ketoprofen (1.60 mg/mL) after 2 mm activation of 7 mm long delta loops used for maxillary en-masse orthodontic space closure. SUBJECTS AND METHODS Twenty patients (seven males, 13 females, 15-25 years of age, mean age of 19.5 years) participated in a randomised crossover, double-blind trial. After appliance activation, participants were instructed to use analgesic gels and record pain perception at 2, 6, 24 hours and 2, 3 and 7 days (at 18.00 hrs), using a visual analogue scale ruler (VAS, 0-4). Each patient received all three gels (benzocaine, ketoprofen, and a control (placebo)) randomly, but at three different appliance activation visits following a wash-over gap of one month. After the first day, the patients were instructed to repeat gel application twice a day at 10:00 and 18:00 hrs for three days. The recorded pain scores were subjected to non-parametric analysis. RESULTS The highest pain was recorded at 2 and 6 hours. Pain scores were significantly different between the three groups (Kruskal-Wallis test, p < 0.01). The overall mean (SD) pain scores for the benzocaine 5%, ketoprofen, and control (placebo) groups were 0.89 (0.41), 0.68 (0.34), and 1.15 (0.81), respectively. The pain scores were significantly different between the ketoprofen and control groups (mean difference = 0.47, p = 0.005). All groups demonstrated significant differences in pain scores at the six different time intervals (p < 0.05) and there was no gender difference (p > 0.05). CONCLUSION A significant pain reduction was observed following the use of ketoprofen when tested against a control gel (placebo). The highest pain scores were experienced in patients administered the placebo and the lowest scores in patients who applied ketoprofen gel. Benzocaine had an effect mid-way between ketoprofen and the placebo. The highest pain scores were recorded 2 hours following force application, which decreased to the lowest scores after 7 days.
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34
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Gholami GA, Gholami H, Amid R, Kadkhodazadeh M, Mehdizadeh AR, Youssefi N. Bone-added periodontal plastic surgery: a new approach in esthetic dentistry. Ann Surg Innov Res 2015; 9:1. [PMID: 25763099 PMCID: PMC4355546 DOI: 10.1186/s13022-015-0010-5] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 01/21/2015] [Indexed: 11/16/2022]
Abstract
This article proposes a combined technique including bone grafting, connective tissue graft, and coronally advanced flap to create some space for simultaneous bone regrowth and root coverage. A 23 year-old female was referred to our private clinic with a severe class II Miller recession and lack of attached gingiva. The suggested treatment plan comprised of root coverage combined with xenograft bone particles. The grafted area healed well and full coverage was achieved at 12-month follow-up visit. Bone-added periodontal plastic surgery can be considered as a practical procedure for management of deep gingival recession without buccal bone plate.
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Affiliation(s)
- Gholam Ali Gholami
- Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
| | - Hadi Gholami
- Department of Prosthodontics, Faculty of Dental Medicine, University of Bern, Bern, Switzerland
| | - Reza Amid
- Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
| | - Mahdi Kadkhodazadeh
- Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
| | - Amir Reza Mehdizadeh
- Dental Research Center, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
| | - Navid Youssefi
- Dental Research Center, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
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35
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Worni A, Gholami H, Marchand L, Katsoulis J, Mericske-Stern R, Enkling N. Retrievability of Implant-Supported Crowns When Using Three Different Cements: A Controlled Clinical Trial. INT J PROSTHODONT 2015; 28:22-9. [DOI: 10.11607/ijp.4119] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Gholami H, Mericske-Stern R, Kessler-Liechti G, Katsoulis J. Radiographic bone level changes of implant-supported restorations in edentulous and partially dentate patients: 5-year results. Int J Oral Maxillofac Implants 2014; 29:898-904. [PMID: 25032770 DOI: 10.11607/jomi.3042] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To evaluate and compare crestal bone level changes and peri-implant status of implant-supported reconstructions in edentulous and partially dentate patients after a minimum of 5 years of loading. MATERIALS AND METHODS All patients who received a self-tapping implant with a microstructured surface during the years 2003 and 2004 at the Department of Prosthodontics, University of Bern, were included in this study. The implant restorations comprised fixed and removable prostheses for partially and completely edentulous patients. Radiographs were taken immediately after surgery, at impression making, and 1 and 5 years after loading. Crestal bone level (BIC) was measured from the implant shoulder to the first bone contact, and changes were calculated over time (ΔBIC). The associations between pocket depth, bleeding on probing (BOP), and ΔBIC were assessed. RESULTS Sixty-one implants were placed in 20 patients (mean age, 62 ± 7 years). At the 5-year follow-up, 19 patients with 58 implants were available. Implant survival was 98.4% (one early failure; one patient died). The average ΔBIC between surgery and 5-year follow-up was 1.5 ± 0.9 mm and 1.1 ± 0.6 mm for edentulous and partially dentate patients, respectively. Most bone resorption (50%, 0.7 mm) occurred during the first 3 months (osseointegration) and within the first year of loading (21%, 0.3 mm). Mean annual bone loss during the 5 years of loading was < 0.12 mm. Mean pocket depth was 2.6 ± 0.7 mm. Seventeen percent of the implant sites displayed BOP; the frequency was significantly higher in women. None of the variables were significantly associated with crestal bone loss. CONCLUSION Crestal bone loss after 5 years was within the normal range, without a significant difference between edentulous and partially dentate patients. In the short term, this implant system can be used successfully for various prosthetic indications.
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MESH Headings
- Aged
- Alveolar Bone Loss/diagnostic imaging
- Coated Materials, Biocompatible
- Dental Implantation, Endosseous/methods
- Dental Implants
- Dental Prosthesis Design
- Dental Prosthesis, Implant-Supported
- Dental Restoration Failure/statistics & numerical data
- Denture, Partial, Removable
- Female
- Follow-Up Studies
- Humans
- Jaw, Edentulous, Partially/diagnostic imaging
- Jaw, Edentulous, Partially/surgery
- Male
- Middle Aged
- Mouth, Edentulous/diagnostic imaging
- Mouth, Edentulous/surgery
- Osseointegration
- Prospective Studies
- Radiography
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37
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Anyika M, Gholami H, Ashtekar KD, Acho R, Borhan B. Point-to-Axial Chirality Transfer—A New Probe for “Sensing” the Absolute Configurations of Monoamines. J Am Chem Soc 2014; 136:550-3. [DOI: 10.1021/ja408317b] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mercy Anyika
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Hadi Gholami
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Kumar D. Ashtekar
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Robert Acho
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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Abstract
A 3-day-old girl with invasive V. cholerae infection is described. Her mother had cholera in the perinatal period. Because of retracted nipples, she expressed milk and fed her infant by bottle. The infant died on the 2nd day of admission.
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Affiliation(s)
- H Masoumi Asl
- Centre for Disease Control, Ministry of Health & Medical Education, Tehran, Iran.
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39
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Katsoulis J, Wälchli J, Kobel S, Gholami H, Mericske-Stern R. Complications with Computer-Aided Designed/Computer-Assisted Manufactured Titanium and Soldered Gold Bars for Mandibular Implant-Overdentures: Short-Term Observations. Clin Implant Dent Relat Res 2013; 17 Suppl 1:e75-85. [DOI: 10.1111/cid.12130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Joannis Katsoulis
- Department of Prosthodontics, School of Dental Medicine; University of Bern; Bern Switzerland
| | - Julia Wälchli
- Department of Prosthodontics, School of Dental Medicine; University of Bern; Bern Switzerland
| | - Simone Kobel
- Department of Prosthodontics, School of Dental Medicine; University of Bern; Bern Switzerland
| | - Hadi Gholami
- Department of Prosthodontics, School of Dental Medicine; University of Bern; Bern Switzerland
| | - Regina Mericske-Stern
- Department of Prosthodontics, School of Dental Medicine; University of Bern; Bern Switzerland
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40
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Enkling N, Ueda T, Gholami H, Bayer S, Katsoulis J, Mericske-Stern R. Precision of fit and retention force of cast non-precious-crowns on standard titanium implant-abutment with different design and height. Clin Oral Implants Res 2013; 25:451-7. [DOI: 10.1111/clr.12167] [Citation(s) in RCA: 5] [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] [Accepted: 03/07/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Norbert Enkling
- Department of Prosthodontics; University of Bern; Bern Switzerland
- Department of Prosthodontics; Preclinical Education and Dental Material Science; University of Bonn; Bonn Germany
| | - Takayuki Ueda
- Department of Removable Prosthodontics and Gerodontology; Tokyo Dental College; Chiba Japan
| | - Hadi Gholami
- Department of Prosthodontics; University of Bern; Bern Switzerland
| | - Stefan Bayer
- Department of Prosthodontics; University of Bern; Bern Switzerland
- Department of Prosthodontics; Preclinical Education and Dental Material Science; University of Bonn; Bonn Germany
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41
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Halimehjnai AZ, Hosseyni S, Gholami H, Hashemi MM. Boric Acid / Glycerol as an Efficient Catalyst for Synthesis of Thiomorpholine 1,1-Dioxide by Double Michael Addition Reaction in Water. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.594930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Ansari M, Rad MAG, Hassanzadeh M, Gholami H, Yousefi Z, Dabbagh VR, Sadeghi R. Sentinel node biopsy in endometrial cancer: systematic review and meta-analysis of the literature. EUR J GYNAECOL ONCOL 2013; 34:387-401. [PMID: 24475571] [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: 06/03/2023]
Abstract
PURPOSE Sentinel lymph node biopsy is a fairly new approach for staging of gynecological malignancies. In the current study, the authors comprehensively reviewed the available reports on sentinel node biopsy of endometrial cancer. MATERIALS AND METHODS The authors searched Medline, SCOPUS, ISI web of knowledge, Science Direct, Springer, OVID SP, and Google Scholar with the following search terms: "endometrium OR endometrial OR uterine OR uterus AND sentinel". The outcomes of interest were detection rate and sensitivity. RESULTS Overall, 35 studies had enough information for false negative rate evaluation and 51 studies (including the sub-groups of individual studies) for detection rate evaluation (2,071 patients overall). Pooled detection rate was 77.8% (95% CI: 73.5-81.5%) and pooled sensitivity was 89% (95% CI: 83-93%). Cervical injection, as well as using both blue dye and radiotracer, results in higher detection rate and sensitivity. New techniques such as fluorescent dye injection and robotic-assisted surgery showed high detection rate and sensitivity. CONCLUSION Sentinel node mapping is feasible in endometrial cancer. Using both blue dye and radiotracer and cervical injection of the mapping material can optimize the sensitivity and detection rate of this technique. Larger studies are still needed to evaluate the false negative rate and the factors influencing the sensitivity before considering this method safe.
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Affiliation(s)
- M Ansari
- Nuclear Medicine Department, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M A Ghodsi Rad
- Nuclear Medicine Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M Hassanzadeh
- Women's Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - H Gholami
- Meta-analysis Sub-Committee, Evidence Based Medicine Committee, Mashhad University of Medical Sciences, Masshad, Iran
| | - Z Yousefi
- Women's Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - V R Dabbagh
- Nuclear Medicine Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - R Sadeghi
- Nuclear Medicine Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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43
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Ziyaei-Halimehjani A, Gholami H, Saidi MR. Catalyst-free regioselective ring opening of epoxides with aromatic amines in water and solvent-free conditions. J IRAN CHEM SOC 2012. [DOI: 10.1007/s13738-012-0122-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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44
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Gholami H, Towhidi A, Zare Shahneh A, Dirandeh E. The relationship of plasma leptin concentration and puberty in Holstein bull calves (Bos taurus). J Anim Physiol Anim Nutr (Berl) 2011; 94:797-802. [PMID: 20455963 DOI: 10.1111/j.1439-0396.2009.00970.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The objective of this experiment was to study the changes of plasma leptin concentration during puberty and its relationship with testosterone level and testis dimensions in Holstein bull calves. Six Iranian Holstein bull calves with approximately 6 months of age were used. Semen evaluation was conducted at 1-month interval to determine the puberty state. To detect the plasma leptin and testosterone changes, blood samples were collected from the jugular vein during pre-puberty (6-7 months of age), puberty (8-9 months of age) and post-puberty (10-11 months of age). In addition, body weight (BW), body condition score (BCS) and testicular width and length were measured at 3-week intervals. The effects of time (age) on total sperm number and percentage of progressive motility of sperm, plasma concentration of leptin and testosterone, amplitude and frequencies of testosterone, BW, BCS, testicular dimensions were significant. Sperm number and progressive motility during post-puberty were higher than those during puberty and pre-puberty. Plasma concentration of leptin during the pre-puberty was higher than those during puberty and post-puberty (p < 0.01). Mean plasma testosterone concentrations during puberty were higher than those during pre-puberty (p < 0.05). BW, BCS and testicular dimensions consistently increased throughout the trial. Results indicated that in growing bull calves, plasma concentrations of leptin decreased during puberty, while circulating testosterone increased.
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Affiliation(s)
- H Gholami
- Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, Tehran, Iran
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Abstract
SummaryAim: Sentinel node (SN) biopsy is becoming a standard procedure in the management of several malignancies. Several groups have evaluated the feasibility and value of this procedure in prostate cancer patients. In the current meta-analysis, we comprehensively and quantitatively summarized the results of these studies. Methods: Several databases including Medline, SCOPUS, Google Scholar, Ovid, Springer, and Science direct were systematically searched for the relevant studies regarding SL biopsy in the prostate cancer (“prostate” AND “sentinel” as search keywords). The outcomes of interest were sensitivity and detection rate of the procedure. Results: For detection rate and sensitivity 21 and 16 studies met the criteria of inclusion respectively. Pooled detection rate was 93.8% (95% CI 89–96.6%). Cochrane Q value was 216.077 (I2 = 89.81% and p < 0.001). Pooled sensitivity was 94% (95% CI 91–96%). Cochrane Q value was 14.12 (I2 = 0.0 and p = 0.516). Conclusion: SL biopsy can prevent unnecessary pelvic lymph node dissection in prostate cancer patients. This procedure is feasible with low false negative rate and high detection rate.
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Gholami H, Chamani M, Towhidi A, Fazeli MH. Effect of feeding a docosahexaenoic acid-enriched nutriceutical on the quality of fresh and frozen-thawed semen in Holstein bulls. Theriogenology 2010; 74:1548-58. [PMID: 20708237 DOI: 10.1016/j.theriogenology.2010.06.025] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 06/15/2010] [Accepted: 06/20/2010] [Indexed: 10/19/2022]
Abstract
The aim of the current study was to investigate the effect of feeding a DHA-enriched nutriceutical on the in vitro quality and sperm motility parameters of fresh and frozen-thawed bull semen assessed by CASA. Samples were obtained from nineteen Holstein bulls used for semen collection at Semen Production Center, Karaj, Iran. Control group (n = 10) were fed a standard concentrate feed while treatment group bulls (n = 9) had this standard feed top dressed with 100 g of a commercially available DHA-enriched nutriceutical. Semen quality was assessed on ejaculates collected at the baseline and after 5, 9, and 12 weeks of supplementation. Classical semen evaluation, assessment of sperm motility (subjective and computer-assisted), viability (eosin-nigrosin), and hypo-osmotic swelling test (HOST) were conducted. Semen volume, sperm concentration, and consequently total sperm output were not affected by dietary treatment (P > 0.05). Feeding the nutriceutical was indeed found to affect sperm motility parameters assessed by CASA after 9 weeks of trial. The treatment has improved total motility (P < 0.01), progressive motility (P < 0.05), average path velocity (P < 0.05), HOST-positive (P < 0.01), and proportion of rapid spermatozoa (P < 0.01) in the fresh semen of bulls. Moreover, the proportion of viable spermatozoa increased (P < 0.05) in the ejaculates collected from nutriceutical-fed bulls compared to the control after 12 weeks of feeding trial. The post-thawed HOST and sperm motility data obtained by CASA did not differ between two groups (P > 0.05). On the other hand, dietary supplementation did not affect body weight, BCS and scrotal circumference. Consequently, it can be concluded that dietary DHA supplementation or its precursors, improve in vitro quality and motility parameters of fresh semen assessed by CASA in Holstein bulls. However, this effect was not pronounced in frozen-thawed semen.
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Affiliation(s)
- H Gholami
- Department of Animal Science, Islamic Azad University, Science and Research Branch, Tehran, Iran.
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Gholami H, Vicari E, Molis M, La Vignera S, Papaleo E, Cappiello F. Pregnancy outcome following in vitro fertilization-embryo transfer (IVF-ET) in women aged < 37, undergoing ovulation induction with human FSH compared with recombinant FSH: a randomised controlled study. Eur Rev Med Pharmacol Sci 2010; 14:97-102. [PMID: 20329567] [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: 05/29/2023]
Abstract
OBJECTIVE To compare the pregnancy outcome in patients undergoing in vitro fertilization-embryo transfer (IVF-ET) cycles, using human derived follicle-stimulating hormone (FSH) or recombinant FSH for ovarian stimulation protocols. DESIGN Prospective, multi-centre, randomized controlled trial. PATIENTS 115 infertile patients undergoing a first attempt of in vitro fertilization and embryo transfer were included in the study. The inclusion criteria were: female age < 37 years and use of GnRH agonist (GnRH-a) for pituitary downregulation. INTERVENTIONS Long Protocol-controlled ovarian stimulation with human derived FSH or recombinant FSH for IVF-ET. MAIN OUTCOME MEASURES Primary endpoints were implantation rate, clinical pregnancy rate and spontaneous abortion rate. Secondary end-points were total units of FSH injected, days of stimulation, peak estradiol levels at point of hCG administration, mean number of oocytes at pick-up, fertilization rate and cleavage rate. RESULTS No statistically significantly differences in pregnancy outcomes were found in the patients receiving hFSH in comparison to patients receiving rFSH. CONCLUSIONS This study did not demonstrate a difference between the use of h-FSH vs r-FSH for ovarian stimulation in terms of pregnancy outcome, in good prognosis patients undergoing their first IVF-ET procedure.
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Gerli S, Gholami H, Manna C, Di Frega AS, Vitiello C, Unfer V, Manna A. Use of ethinyl estradiol to reverse the antiestrogenic effects of clomiphene citrate in patients undergoing intrauterine insemination: a comparative, randomized study. Fertil Steril 2000; 73:85-9. [PMID: 10632418 DOI: 10.1016/s0015-0282(99)00447-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [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: 10/18/2022]
Abstract
OBJECTIVE To compare the effectiveness of clomiphene citrate used alone and in combination with ethinyl E2 for the induction of ovulation in patients undergoing IUI. DESIGN Randomized, double-blind study. SETTING Four infertility treatment centers. PATIENT(S) Women aged 25-35 years with infertility of at least 2 years' duration and oligomenorrhea or amenorrhea associated with a positive menstrual response to an IM progesterone challenge. INTERVENTION(S) A total of 64 patients were randomized to treatment with CC (100 mg daily for 5 days) or CC (100 mg daily for 5 days) plus ethinyl E2 (0.05 mg daily for 5 days). MAIN OUTCOME MEASURE(S) The uterine artery pulsatility index, number of preovulatory follicles, endometrial thickness, and pregnancy rate. RESULT(S) Both treatment regimens increased FSH, LH, and 17beta-E2 levels, with no statistically significant differences. There was a statistically significant difference in endometrial thickness between the two treatment groups. No statistically significant differences were noted in pulsatility index values or in the number of preovulatory follicles. CONCLUSION(S) Ethinyl E2 can reverse the deleterious effects of CC on endometrial thickness, which may contribute to higher pregnancy rates.
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Affiliation(s)
- S Gerli
- Department of Obstetrics and Gynecology, University of Perugia, Italy
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Gerli S, Perino M, Abate A, Costabile L, Gholami H, Vitiello L. Ovarian stimulation using a new highly purified urinary FSH: a prospective randomized clinical study. CLIN EXP OBSTET GYN 1999; 26:93-4. [PMID: 10459447] [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: 02/13/2023]
Abstract
The aim of this study was to determine the effectiveness of a new highly purified urinary FSH. A total of 60 in vitro-fertilization (IVF) patients, undergoing embryo transfer (ET) for the first time, were randomly allocated into two groups: Group A (n = 30). Subcutaneous administration of urinary follicle-stimulating hormone (FSH, Fostimon 75, A.M.S.A., Italy). Group B (n = 30). Subcutaneous administration of urinary follicle-stimulating hormone (FSH, Metrodin 75 HP, Serono, Italy). Statistical analysis was performed using the chi-square test, p < 0.05 was assumed as significant. This prospective randomized clinical study in an IVF-ET program showed that both drugs were equally safe and effective. Except for the number of the high quality embryos (3.16 vs 2.9; p = 0.03) the two groups did not differ in stimulation parameters or clinical pregnancy rates per attempt and per transfer. On the other hand, a mean number of 3.56 vs 2.18 embryos were cryopreserved in group A and in group B, respectively, as a result of the high number of mature oocytes and high quality embryos. When frozen embryos cycles were included, the difference in pregnancy rate became significant.
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Affiliation(s)
- S Gerli
- Gynecological and Obstetric Institute, University of Perugia, Italy
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