World's Best Scientists 2026 revealed!
Hartmut Geiger

Hartmut Geiger

D-Index & Metrics

Biology and Biochemistry

D-Index
61
Citations
13980
World Ranking
11304
National Ranking
807

Hartmut Geiger publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Hartmut Geiger sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 237 publications — 63rd percentile

63% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Hartmut Geiger D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Hartmut Geiger sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 61 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Hartmut Geiger is affiliated with the University of Ulm in Germany. Their research spans multiple areas within biochemistry, genetics, molecular biology, and medicine, with a particular focus on aging, hematopoietic stem cells, and immune system function.

Their published work includes prominent papers such as:

  • Inhibition of Cdc42 activity extends lifespan and decreases circulating inflammatory cytokines in aged female C57BL/6 mice, 2020, Aging Cell
  • Targeted methods for epigenetic age predictions in mice, 2020, Scientific Reports
  • Aging of intestinal stem cells, 2022, Stem Cell Reports
  • Aging of human hematopoietic stem cells is linked to changes in Cdc42 activity, 2021, Haematologica
  • Induction of mitochondrial recycling reverts age-associated decline of the hematopoietic and immune systems, 2023, Nature Aging

Frequent co-authors who have collaborated extensively with Hartmut Geiger include:

  • Maria Carolina Florian
  • Vadim Sakk
  • Karin Soller
  • Kalpana Nattamai
  • Mehmet Saçma

They have contributed multiple publications to several scientific journals and preprint servers, notably:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Aging Cell
  • Blood
  • Blood Advances
  • Nature Communications

The main fields of study for Hartmut Geiger are biochemistry, genetics and molecular biology, with significant work also in medicine. Their research covers subfields including molecular biology, hematology, immunology, genetics, and oncology.

Key topics explored through their research publications are:

  • Epigenetics and DNA Methylation
  • Hematopoietic Stem Cell Transplantation
  • Cancer Cells and Metastasis
  • Single-cell and spatial transcriptomics
  • Immune Cell Function and Interaction
  • Acute Myeloid Leukemia Research
  • Wnt/β-catenin signaling in development and cancer

Best Publications

  • The Collaborative Cross, a community resource for the genetic analysis of complex traits

    Gary A. Churchill;David C. Airey;Hooman Allayee;Joe M. Angel

  • Exit from dormancy provokes DNA-damage-induced attrition in haematopoietic stem cells

    Dagmar Walter;Amelie Lier;Anja Geiselhart;Frederic B. Thalheimer

  • CDC42 ACTIVITY REGULATES HEMATOPOIETIC STEM CELL AGING AND REJUVENATION

    Maria Carolina Florian;Karin Dörr;Anja Niebel;Deidre Daria

  • The ageing haematopoietic stem cell compartment

    Hartmut Geiger;Hartmut Geiger;Gerald de Haan;M. Carolina Florian

  • Impaired immune surveillance accelerates accumulation of senescent cells and aging

    Yossi Ovadya;Tomer Landsberger;Hanna Leins;Ezra Vadai

  • Inflammation-Induced Emergency Megakaryopoiesis Driven by Hematopoietic Stem Cell-like Megakaryocyte Progenitors

    Simon Haas;Jenny Hansson;Daniel Klimmeck;Daniel Klimmeck;Dirk Loeffler

  • Vitamin A-Retinoic Acid Signaling Regulates Hematopoietic Stem Cell Dormancy.

    Nina Cabezas-Wallscheid;Florian Buettner;Pia Sommerkamp;Daniel Klimmeck

  • The impact of altered p53 dosage on hematopoietic stem cell dynamics during aging

    Melissa Dumble;Lynette Marie Moore;Stuart M. Chambers;Hartmut Geiger

  • A canonical to non-canonical Wnt signalling switch in haematopoietic stem-cell ageing

    Maria Carolina Florian;Kalpana J. Nattamai;Karin Dörr;Gina Marka

  • The aging of lympho-hematopoietic stem cells.

    Hartmut Geiger;Gary Van Zant

  • Rho GTPase Cdc42 coordinates hematopoietic stem cell quiescence and niche interaction in the bone marrow.

    Linda Yang;Lei Wang;Hartmut Geiger;Jose A. Cancelas

  • G-CSF-mediated thrombopoietin release triggers neutrophil motility and mobilization from bone marrow via induction of Cxcr2 ligands.

    Anja Köhler;Katia De Filippo;Mike Hasenberg;Cindy van den Brandt

  • Altered cellular dynamics and endosteal location of aged early hematopoietic progenitor cells revealed by time-lapse intravital imaging in long bones.

    Anja Köhler;Vince Schmithorst;Marie-Dominique Filippi;Marnie A. Ryan

  • Canonical Wnt Signaling Ameliorates Aging of Intestinal Stem Cells

    Kodandaramireddy Nalapareddy;Kalpana J. Nattamai;Rupali S. Kumar;Rebekah Karns

  • Increased hematopoietic stem cell mobilization in aged mice

    Zhenlan Xing;Zhenlan Xing;Marnie A. Ryan;Marnie A. Ryan;Deidre Daria;Deidre Daria;Kalpana J. Nattamai;Kalpana J. Nattamai

  • TNF-α induces leukemic clonal evolution ex vivo in Fanconi anemia group C murine stem cells

    June Li;Daniel P. Sejas;Xiaoling Zhang;Yuhui Qiu

  • Globin gene expression is reprogrammed in chimeras generated by injecting adult hematopoietic stem cells into mouse blastocysts

    Hartmut Geiger;Stefanie Sick;Constanze Bonifer;Albrecht M Müller

  • Aging, Clonality, and Rejuvenation of Hematopoietic Stem Cells

    Shailaja Akunuru;Hartmut Geiger

  • Unrestrained erythroblast development in Nix−/− mice reveals a mechanism for apoptotic modulation of erythropoiesis

    Abhinav Diwan;Andrew G. Koesters;Amy M. Odley;Suvarnamala Pushkaran

  • HSC Niche Biology and HSC Expansion Ex Vivo

    Sachin Kumar;Hartmut Geiger

Frequent Co-Authors

Yi Zheng
Yi Zheng Cincinnati Children's Hospital Medical Center
Jose A. Cancelas
Jose A. Cancelas Cincinnati Children's Hospital Medical Center
David A. Williams
David A. Williams Boston Children's Hospital
Gerald de Haan
Gerald de Haan University Medical Center Groningen
Andreas Trumpp
Andreas Trumpp German Cancer Research Center
Matthias Gunzer
Matthias Gunzer University of Duisburg-Essen
Nancy Ratner
Nancy Ratner Cincinnati Children's Hospital Medical Center
Stella M. Davies
Stella M. Davies Cincinnati Children's Hospital Medical Center
Frank Kirchhoff
Frank Kirchhoff University of Ulm
Lars M. Steinmetz
Lars M. Steinmetz Stanford University

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