Sam L. Koprak

1.8k total citations · 1 hit paper
10 papers, 1.5k citations indexed

About

Sam L. Koprak is a scholar working on Molecular Biology, Organic Chemistry and Immunology. According to data from OpenAlex, Sam L. Koprak has authored 10 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Molecular Biology, 4 papers in Organic Chemistry and 4 papers in Immunology. Recurrent topics in Sam L. Koprak's work include Signaling Pathways in Disease (5 papers), Platelet Disorders and Treatments (2 papers) and Sphingolipid Metabolism and Signaling (2 papers). Sam L. Koprak is often cited by papers focused on Signaling Pathways in Disease (5 papers), Platelet Disorders and Treatments (2 papers) and Sphingolipid Metabolism and Signaling (2 papers). Sam L. Koprak collaborates with scholars based in United States and Czechia. Sam L. Koprak's co-authors include Francis J. Dumont, Mary Jo Staruch, N H Sigal, Michael Melino, Paul Fischer, John J. Siekierka, P. L. DURETTE, Daniel H. Rich, Brian Dunlap and T. R. BEATTIE and has published in prestigious journals such as The Journal of Experimental Medicine, The Journal of Immunology and Biochemistry.

In The Last Decade

Sam L. Koprak

10 papers receiving 1.5k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Distinct mechanisms of suppression of murine T cell activation by the related macrolides FK-506 and rapamycin.

1990 510 citations Francis J. Dumont, Mary Jo Staruch et al. The Journal of Immunology profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Sam L. Koprak United States	10	1.1k	455	368	162	156	10	1.5k
David G. Alberg United States	13	760 0.7×	262 0.6×	182 0.5×	191 1.2×	68 0.4×	18	1.1k
Karl W. Mollison United States	21	681 0.6×	366 0.8×	105 0.3×	75 0.5×	177 1.1×	45	1.3k
Martin Spitaler Austria	19	907 0.8×	268 0.6×	384 1.0×	51 0.3×	93 0.6×	27	1.4k
Jintang He United States	22	800 0.7×	178 0.4×	355 1.0×	71 0.4×	100 0.6×	40	1.3k
Pamella J. Ford United States	11	557 0.5×	221 0.5×	164 0.4×	67 0.4×	68 0.4×	19	892
Julia M. Ayala United States	18	464 0.4×	440 1.0×	278 0.8×	72 0.4×	66 0.4×	22	1.1k
Silvia Franchini Italy	17	546 0.5×	421 0.9×	103 0.3×	166 1.0×	79 0.5×	56	1.2k
Christopher L. Reading United States	19	731 0.7×	350 0.8×	338 0.9×	109 0.7×	57 0.4×	74	1.8k
J A Belt United States	18	739 0.7×	41 0.1×	696 1.9×	43 0.3×	157 1.0×	28	1.8k
Cinzia Bizzarri Italy	22	673 0.6×	615 1.4×	448 1.2×	96 0.6×	74 0.5×	34	1.5k

Countries citing papers authored by Sam L. Koprak

Since Specialization

Citations

This map shows the geographic impact of Sam L. Koprak's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Sam L. Koprak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sam L. Koprak more than expected).

Fields of papers citing papers by Sam L. Koprak

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sam L. Koprak. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Sam L. Koprak. The network helps show where Sam L. Koprak may publish in the future.

Co-authorship network of co-authors of Sam L. Koprak

This figure shows the co-authorship network connecting the top 25 collaborators of Sam L. Koprak. A scholar is included among the top collaborators of Sam L. Koprak based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Sam L. Koprak. Sam L. Koprak is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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10 of 10 papers shown

Gu, Xin, Jasminka Dragovic, Gloria C. Koo, et al.. (2005). Discovery of 4-heteroarylbicyclo[2.2.2]octyltriazoles as potent and selective inhibitors of 11β-HSD1: Novel therapeutic agents for the treatment of metabolic syndrome. Bioorganic & Medicinal Chemistry Letters. 15(23). 5266–5269. 40 indexed citations

Hale, Jeffrey J., William Neway, Sander G. Mills, et al.. (2004). Potent S1P receptor agonists replicate the pharmacologic actions of the novel immune modulator FTY720. Bioorganic & Medicinal Chemistry Letters. 14(12). 3351–3355. 64 indexed citations

Xie, Jenny, Naomi Nomura, Sam L. Koprak, et al.. (2003). Sphingosine-1-Phosphate Receptor Agonism Impairs the Efficiency of the Local Immune Response by Altering Trafficking of Naive and Antigen-Activated CD4+ T Cells. The Journal of Immunology. 170(7). 3662–3670. 100 indexed citations

Middleton, Richard E., Manuel Sánchez, Randal M. Bugianesi, et al.. (2003). Substitution of a Single Residue in Stichodactyla helianthus Peptide, ShK-Dap²², Reveals a Novel Pharmacological Profile. Biochemistry. 42(46). 13698–13707. 23 indexed citations

Camacho, Ramon E., Mary Jo Staruch, Carolyn DaSilva, et al.. (1999). Hypothemycin inhibits the proliferative response and modulates the production of cytokines during T cell activation. Immunopharmacology. 44(3). 255–265. 22 indexed citations

Koprak, Sam L., Anna Sirotina, Hyun Ok, & Francis J. Dumont. (1996). DEPLETION OF THE MATURE CD4+8- THYMOCYTE SUBSET BY FK506 ANALOGS CORRELATES WITH THEIR IMMUNOSUPPRESSIVE AND CALCINEURIN INHIBITORY ACTIVITIES. Transplantation. 61(6). 926–932. 10 indexed citations

Dumont, Francis J., Mary Jo Staruch, Sam L. Koprak, et al.. (1992). The immunosuppressive and toxic effects of FK-506 are mechanistically related: pharmacology of a novel antagonist of FK-506 and rapamycin.. The Journal of Experimental Medicine. 176(3). 751–760. 223 indexed citations

Sigal, N H, Francis J. Dumont, P. L. DURETTE, et al.. (1991). Is cyclophilin involved in the immunosuppressive and nephrotoxic mechanism of action of cyclosporin A?. The Journal of Experimental Medicine. 173(3). 619–628. 217 indexed citations

Dumont, Francis J., Mary Jo Staruch, Sam L. Koprak, Michael Melino, & N H Sigal. (1990). Distinct mechanisms of suppression of murine T cell activation by the related macrolides FK-506 and rapamycin.. The Journal of Immunology. 144(1). 251–258. 510 indexed citations breakdown →

10.

Dumont, Francis J., Michael Melino, Mary Jo Staruch, et al.. (1990). The immunosuppressive macrolides FK-506 and rapamycin act as reciprocal antagonists in murine T cells.. The Journal of Immunology. 144(4). 1418–1424. 295 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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