Hannu Nikula

769 total citations
26 papers, 675 citations indexed

About

Hannu Nikula is a scholar working on Reproductive Medicine, Endocrinology, Diabetes and Metabolism and Molecular Biology. According to data from OpenAlex, Hannu Nikula has authored 26 papers receiving a total of 675 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Reproductive Medicine, 11 papers in Endocrinology, Diabetes and Metabolism and 8 papers in Molecular Biology. Recurrent topics in Hannu Nikula's work include Sperm and Testicular Function (13 papers), Hormonal and reproductive studies (8 papers) and Hypothalamic control of reproductive hormones (6 papers). Hannu Nikula is often cited by papers focused on Sperm and Testicular Function (13 papers), Hormonal and reproductive studies (8 papers) and Hypothalamic control of reproductive hormones (6 papers). Hannu Nikula collaborates with scholars based in Finland, Sweden and United Kingdom. Hannu Nikula's co-authors include Ilpo Huhtaniemi, S. Rannikko, M. Parvinen, Martti Parvinen, Marko Kaleva, Jorma Toppari, Zvi Naor, Anders Bergh, Jan‐Erik Damber and Kaija‐Leena Kolho and has published in prestigious journals such as The Journal of Clinical Endocrinology & Metabolism, Endocrinology and Annals of the New York Academy of Sciences.

In The Last Decade

Hannu Nikula

26 papers receiving 655 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hannu Nikula Finland 17 391 227 163 160 159 26 675
A.-M. Haavisto Finland 7 509 1.3× 184 0.8× 249 1.5× 223 1.4× 272 1.7× 11 804
Ruey-Sheng Wang Taiwan 6 479 1.2× 188 0.8× 277 1.7× 214 1.3× 327 2.1× 6 855
Lynn Janulis United States 13 396 1.0× 147 0.6× 432 2.7× 165 1.0× 252 1.6× 15 837
Franck Chuzel France 13 236 0.6× 107 0.5× 137 0.8× 114 0.7× 216 1.4× 16 549
C. Auclair Canada 11 464 1.2× 491 2.2× 128 0.8× 61 0.4× 214 1.3× 16 851
Jean Ćailleau Belgium 16 659 1.7× 459 2.0× 233 1.4× 224 1.4× 307 1.9× 34 1.0k
Curtis Chubb United States 13 198 0.5× 207 0.9× 147 0.9× 91 0.6× 161 1.0× 31 516
S. M. Maguire United Kingdom 10 285 0.7× 100 0.4× 451 2.8× 126 0.8× 229 1.4× 11 654
Evi Denolet Belgium 8 392 1.0× 123 0.5× 292 1.8× 181 1.1× 253 1.6× 9 579
Guido Verhoeven Belgium 7 477 1.2× 227 1.0× 311 1.9× 193 1.2× 439 2.8× 8 1.0k

Countries citing papers authored by Hannu Nikula

Since Specialization
Citations

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

Fields of papers citing papers by Hannu Nikula

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hannu Nikula

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

All Works

20 of 20 papers shown
1.
Nikula, Hannu, Pasi Koskimies, Talal El‐Hefnawy, & Ilpo Huhtaniemi. (2001). Functional characterization of the basal promoter of the murine LH receptor gene in immortalized mouse Leydig tumor cells. Journal of Molecular Endocrinology. 26(1). 21–29. 10 indexed citations
2.
Nikula, Hannu, et al.. (1999). Inhibition of hCG-Stimulated Steroidogenesis in Cultured Mouse Leydig Tumor Cells by Bisphenol A and Octylphenols. Toxicology and Applied Pharmacology. 157(3). 166–173. 70 indexed citations
3.
Sundström, Jari, Arno Hänninen, Mika H. Martikainen, et al.. (1997). CD106 (VCAM-1) in testicular immunoregulation. Journal of Reproductive Immunology. 33(3). 221–238. 16 indexed citations
4.
Krawczyk, Zdzisław, et al.. (1996). Regulation of function of the murine luteinizing hormone receptor promoter by cis- and trans-acting elements in mouse Leydig tumor cells. Molecular and Cellular Endocrinology. 119(2). 207–217. 22 indexed citations
5.
Nikula, Hannu, et al.. (1993). Age-related variation of follicle-stimulating hormone-stimulated cAMP production, protein kinase C activity and their interactions in the rat testis. Molecular and Cellular Endocrinology. 93(2). 143–148. 22 indexed citations
6.
Nikula, Hannu, Kimmo K. Vihko, & Ilpo Huhtaniemi. (1990). Protein kinase C and Gi-protein mediated modulation of cAMP production in different stages of the rat seminiferous epithelium. Molecular and Cellular Endocrinology. 70(3). 247–253. 17 indexed citations
7.
Huhtaniemi, Ilpo, Hannu Nikula, & Martti Parvinen. (1989). Pertussis toxin enhances follicle-stimulating hormone-stimulated cAMP production in rat seminiferous tubules in a stage-dependent manner. Molecular and Cellular Endocrinology. 62(1). 89–94. 20 indexed citations
8.
Nikula, Hannu & Ilpo Huhtaniemi. (1989). Effects of protein kinase C activation on cyclic AMP and testosterone production of rat Leydig cells in vitro. European Journal of Endocrinology. 121(3). 327–333. 18 indexed citations
9.
Pöllänen, Pasi, Olof Söder, J Uksila, et al.. (1989). Testicular immunosuppressive peptide.. PubMed. 21(1 Pt 1). 1144–6. 12 indexed citations
10.
RANTA, TAPIO, K Ylinen, Ulf‐Håkan Stenman, Hannu Nikula, & Ilpo Huhtaniemi. (1988). BIOLOGICAL AND IMMUNOLOGICAL ACTIVITY OF HUMAN CHORIONIC GONADOTROPHIN IN MATERNAL SERUM DURING EARLY PREGNANCY. Clinical Endocrinology. 29(5). 495–501. 1 indexed citations
11.
Huhtaniemi, Ilpo, Hannu Nikula, Martti Parvinen, & S. Rannikko. (1988). Histological and Functional Changes of the Testis Tissue During GnRH Agonist Treatment of Prostatic Cancer. American Journal of Clinical Oncology. 11(Supplement 1). S16–S16. 19 indexed citations
12.
Kolho, Kaija‐Leena, Hannu Nikula, & Ilpo Huhtaniemi. (1988). Sexual maturation of male rats treated postnatally with a gonadotrophin-releasing hormone antagonist. Journal of Endocrinology. 116(2). 241–246. 27 indexed citations
13.
Nikula, Hannu & Ilpo Huhtaniemi. (1988). Gonadotropin-releasing hormone agonist activates protein kinase C in rat Leydig cells. Molecular and Cellular Endocrinology. 55(1). 53–59. 18 indexed citations
14.
Huhtaniemi, Ilpo, Hannu Nikula, & S. Rannikko. (1987). Pituitary—Testicular Function of Prostatic Cancer Patients During Treatment with a Gonadotropin‐Releasing Hormone Agonist Analog I. Circulating Hormone Levels. Journal of Andrology. 8(6). 355–362. 23 indexed citations
15.
16.
Huhtaniemi, Ilpo, Hannu Nikula, A. Detta, John M. Stewart, & Richard N. Clayton. (1987). Blockade of rat testicular gonadotropin releasing hormone (GnRH) receptors by infusion of a GnRH antagonist has no major effects on Leydig cell function in vivo. Molecular and Cellular Endocrinology. 49(2-3). 89–97. 19 indexed citations
17.
Martikainen, Hannu, Lars Rönnberg, Ulla Puistola, et al.. (1986). Comparison of the effects of follicle-stimulating hormone and human menopausal gonadotropin on peripheral serum and follicular fluid hormones during ovarian stimulation. Fertility and Sterility. 46(2). 317–320. 8 indexed citations
18.
Huhtaniemi, Ilpo, Hannu Nikula, S. Rannikko, & Richard N. Clayton. (1986). Regulation of testicular steroidogenesis by gonadotropin-releasing hormone agonists and antagonists. Journal of Steroid Biochemistry. 24(1). 169–176. 6 indexed citations
19.
20.
Parvinen, Martti, Hannu Nikula, & Ilpo Huhtaniemi. (1984). Cyclic Regulation of Rat Leydig Cell Testosterone Production by eminiferous Tubules. Annals of the New York Academy of Sciences. 438(1). 681–683. 3 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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