Karim Nayernia

5.8k total citations · 2 hit papers
90 papers, 4.5k citations indexed

About

Karim Nayernia is a scholar working on Molecular Biology, Reproductive Medicine and Genetics. According to data from OpenAlex, Karim Nayernia has authored 90 papers receiving a total of 4.5k indexed citations (citations by other indexed papers that have themselves been cited), including 51 papers in Molecular Biology, 39 papers in Reproductive Medicine and 31 papers in Genetics. Recurrent topics in Karim Nayernia's work include Sperm and Testicular Function (38 papers), Pluripotent Stem Cells Research (24 papers) and Reproductive Biology and Fertility (22 papers). Karim Nayernia is often cited by papers focused on Sperm and Testicular Function (38 papers), Pluripotent Stem Cells Research (24 papers) and Reproductive Biology and Fertility (22 papers). Karim Nayernia collaborates with scholars based in Germany, Iran and United Kingdom. Karim Nayernia's co-authors include Wolfgang Engel, Jae Ho Lee, Ibrahim M. Adham, Jessica Nolte, Kaomei Guan, Ralf Dressel, Gerd Hasenfuß, Gerald Wulf, Nadja Drusenheimer and Frieder Wolf and has published in prestigious journals such as Nature, Journal of Biological Chemistry and SHILAP Revista de lepidopterología.

In The Last Decade

Karim Nayernia

89 papers receiving 4.4k citations

Hit Papers

align trajectories

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.

Pluripotency of spermatogonial stem cells from adult mouse testis

2006 636 citations Kaomei Guan, Karim Nayernia et al. Nature profile →
Targeted Disruption of the Insl3 Gene Causes Bilateral Cryptorchidism

1999 528 citations Stephan Zimmermann, Gerd Steding et al. Molecular Endocrinology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Karim Nayernia Germany	30	2.7k	1.6k	1.5k	1.1k	796	90	4.5k
Ibrahim M. Adham Germany	39	1.9k 0.7×	2.2k 1.3×	1.4k 0.9×	1.1k 1.0×	823 1.0×	95	4.6k
Susanna Dolci Italy	37	2.8k 1.0×	1.5k 0.9×	1.7k 1.1×	1.8k 1.6×	621 0.8×	109	4.9k
Pellegrino Rossi Italy	36	2.6k 1.0×	1.4k 0.9×	1.7k 1.1×	1.5k 1.3×	452 0.6×	81	4.7k
Raffaele Geremia Italy	41	2.7k 1.0×	1.5k 0.9×	2.0k 1.3×	1.4k 1.3×	390 0.5×	99	4.9k
Guangxiu Lu China	30	1.6k 0.6×	1.2k 0.7×	1.0k 0.7×	848 0.8×	194 0.2×	229	3.2k
Kenji Miyado Japan	33	2.4k 0.9×	1.1k 0.7×	1.1k 0.7×	456 0.4×	597 0.8×	117	4.9k
Kentaro Yomogida Japan	30	1.7k 0.6×	801 0.5×	1.0k 0.7×	869 0.8×	234 0.3×	56	3.0k
Ans M. M. van Pelt Netherlands	40	2.4k 0.9×	2.5k 1.5×	3.1k 2.1×	1.7k 1.6×	485 0.6×	117	5.0k
Teresa D. Gallardo United States	24	2.8k 1.0×	663 0.4×	483 0.3×	508 0.5×	1.5k 1.9×	35	4.2k
Debra J. Wolgemuth United States	43	4.0k 1.5×	1.5k 0.9×	1.5k 1.0×	1.5k 1.4×	377 0.5×	103	5.7k

Countries citing papers authored by Karim Nayernia

Since Specialization

Citations

This map shows the geographic impact of Karim Nayernia'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 Karim Nayernia with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karim Nayernia more than expected).

Fields of papers citing papers by Karim Nayernia

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karim Nayernia. 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 Karim Nayernia. The network helps show where Karim Nayernia may publish in the future.

Co-authorship network of co-authors of Karim Nayernia

This figure shows the co-authorship network connecting the top 25 collaborators of Karim Nayernia. A scholar is included among the top collaborators of Karim Nayernia 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 Karim Nayernia. Karim Nayernia is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Mahmoodzadeh, Habibollah, et al.. (2022). Investigation of key signaling pathways and appropriate diagnostic biomarkers selection between non-invasive to invasive stages in pancreatic cancer: a computational observation. Journal of Medicine and Life. 15(9). 1143–1157. 4 indexed citations

Nayernia, Karim, et al.. (2021). Contradictory Effect of Notch1 and Notch2 on Phosphatase and Tensin Homolog and its Influence on Glioblastoma Angiogenesis. Galen Medical Journal. 10. e2091–e2091. 2 indexed citations

Nixdorff, Uwe, et al.. (2021). A Case Report of Genetic Cascade Screening in Dilated Cardio-myopathy: A Perspective for Preventive Cardiology. Iranian Journal of Public Health. 50(12). 2593–2598.

Khodayari, Saeed, Hamid Khodayari, Maryam Eslami, et al.. (2019). Inflammatory Microenvironment of Acute Myocardial Infarction Prevents Regeneration of Heart with Stem Cells Therapy. Cellular Physiology and Biochemistry. 53(5). 887–909. 55 indexed citations

Nayernia, Karim, et al.. (2019). Application of Stem Cell Technologies to Regenerate Injured Myocardium and Improve Cardiac Function. Cellular Physiology and Biochemistry. 53(1). 101–120. 10 indexed citations

Miryounesi, Mohammad, Karim Nayernia, Maryam Beigom Mobasheri, et al.. (2014). Evaluation of in vitro spermatogenesis system effectiveness to study genes behavior: monitoring the expression of the testis specific 10 (Tsga10) gene as a model.. PubMed. 17(10). 692–7. 15 indexed citations

Shahali, Maryam, Maryam Kabir‐Salmani, Karim Nayernia, et al.. (2013). A Novel In Vitro Model for Cancer Stem Cell Culture Using\nEctopically Expressed Piwil2 Stable Cell Line. SHILAP Revista de lepidopterología. 8 indexed citations

Dianatpour, Mehdi, et al.. (2012). Expression of Testis Specific Genes TSGA10, TEX101 and ODF3 in Breast Cancer. Iranian Red Crescent Medical Journal. 14(11). 730–4. 53 indexed citations

Lee, Jae Ho, Stefan Schweyer, Moneef Shoukier, et al.. (2010). Pathways of Proliferation and Antiapoptosis Driven in Breast Cancer Stem Cells by Stem Cell Protein Piwil2. Cancer Research. 70(11). 4569–4579. 96 indexed citations

10.

Streckfuß‐Bömeke, Katrin, Swen Hülsmann, Karim Nayernia, et al.. (2008). Generation of functional neurons and glia from multipotent adult mouse germ-line stem cells. Stem Cell Research. 2(2). 139–154. 34 indexed citations

11.

Dev, Arvind, et al.. (2007). Mice deficient for RNA‐binding protein brunol1 show reduction of spermatogenesis but are fertile. Molecular Reproduction and Development. 74(11). 1456–1464. 22 indexed citations

12.

Dev, Arvind, Andreas Meinhardt, Dirk G. de Rooij, et al.. (2007). Asthenoteratozoospermia in mice lacking testis expressed gene 18 (Tex18). Molecular Human Reproduction. 13(3). 155–163*. 8 indexed citations

13.

Guan, Kaomei, Karim Nayernia, Lars S. Maier, et al.. (2006). Pluripotency of spermatogonial stem cells from adult mouse testis. Nature. 440(7088). 1199–1203. 636 indexed citations breakdown →

14.

Nayernia, Karim, Birgit Drabent, Andreas Meinhardt, et al.. (2005). Triple knockouts reveal gene interactions affecting fertility of male mice. Molecular Reproduction and Development. 70(4). 406–416. 20 indexed citations

15.

Nayernia, Karim. (2004). Stem cell based therapeutical approach of male infertility by teratocarcinoma derived germ cells. Human Molecular Genetics. 13(14). 1451–1460. 102 indexed citations

16.

Nayernia, Karim, et al.. (2000). THE ROLE OF ACROSIN IN REPRODUCTION. Journal of Reproduction & Infertility. 1(44). 38–43. 2 indexed citations

17.

Zimmermann, Stephan, Gerd Steding, Judith M. A. Emmen, et al.. (1999). Targeted Disruption of the Insl3 Gene Causes Bilateral Cryptorchidism. Molecular Endocrinology. 13(5). 681–691. 528 indexed citations breakdown →

18.

Adham, Ibrahim M., et al.. (1999). Male Mice Deficient for Germ-Cell Cyritestin Are Infertile1. Biology of Reproduction. 61(6). 1445–1451. 184 indexed citations

19.

Nayernia, Karim, et al.. (1996). Stage and developmental specific gene expression during mammalian spermatogenesis. The International Journal of Developmental Biology. 40(1). 379–383. 44 indexed citations

20.

Schäfer, Mireille, Karim Nayernia, Wolfgang Engel, & Ulrich Schäfer. (1995). Translational Control in Spermatogenesis. Developmental Biology. 172(2). 344–352. 120 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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