World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
84
Citations
29252
World Ranking
3286
National Ranking
1664

James Varani 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 James Varani 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: 380 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

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

James Varani 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 James Varani 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: 84 D-Index — 84th percentile

84% of scientists in this discipline score the same or lower.

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

Overview

James Varani is affiliated with the University of Michigan-Ann Arbor in the United States. Their research primarily focuses on medicine, with specific attention to physiology, genetics, nutrition and dietetics, pathology and forensic medicine, and oncology.

The main topics addressed in their work include:

  • Trace Elements in Health
  • Vitamin D Research Studies
  • Inflammatory Bowel Disease
  • Gut Microbiota and Health
  • Nutrition and Health in Aging
  • Diet and Metabolism Studies
  • Iron Metabolism and Disorders

Selected recent publications by James Varani include:

  • Transferrin Receptor-Mediated Iron Uptake Promotes Colon Tumorigenesis, 2023, Advanced Science
  • A MULTI-MINERAL INTERVENTION TO IMPROVE DISEASE-RELATED AND MECHANISTIC BIOMARKERS IN ULCERATIVE COLITIS PATIENTS, 2025, bioRxiv (Cold Spring Harbor Laboratory)
  • A MULTI-MINERAL INTERVENTION TO MODULATE COLONIC MUCOSAL PROTEIN PROFILE: Results from a 90-day trial in healthy human subjects, 2021, bioRxiv (Cold Spring Harbor Laboratory)
  • Liver Proteomic Profile in Mice on a High-Fat Diet: Modulation with Anti-Tumor Intervention, 2022, The FASEB Journal
  • S1193 Improvement in Disease-Related Biomarkers With an Adjuvant Treatment for 180 Days: Results From an Interventional Trial for Patients With Ulcerative Colitis, 2024, The American Journal of Gastroenterology

Frequent co-authors collaborating with Varani include:

  • Muhammad N. Aslam
  • Shannon D. McClintock
  • D. Kim Turgeon
  • Isabelle Harber
  • Ron Allen

Their work has been published repeatedly in several notable venues, including:

  • Cancer Research
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Advanced Science
  • The FASEB Journal
  • The American Journal of Gastroenterology

Best Publications

  • Mechanisms of photoaging and chronological skin aging

    Gary J. Fisher;Sewon Kang;James Varani;Zsuzsanna Bata-Csorgo

  • Pathophysiology of Premature Skin Aging Induced by Ultraviolet Light

    Gary J. Fisher;Zeng Quan Wang;Subhash C. Datta;James Varani

  • Molecular basis of sun-induced premature skin ageing and retinoid antagonism

    Gary J. Fisher;Subhash C. Datta;Harvinder S. Talwar;Zeng Quan Wang

  • Decreased collagen production in chronologically aged skin: roles of age-dependent alteration in fibroblast function and defective mechanical stimulation.

    James Varani;Michael K. Dame;Laure Rittie;Suzanne E.G. Fligiel

  • Vitamin A antagonizes decreased cell growth and elevated collagen-degrading matrix metalloproteinases and stimulates collagen accumulation in naturally aged human skin.

    James Varani;Roscoe L. Warner;Mehrnaz Gharaee-Kermani;Sem H. Phan

  • In vivo stimulation of de novo collagen production caused by cross-linked hyaluronic acid dermal filler injections in photodamaged human skin

    Frank Wang;Luis A. Garza;Luis A. Garza;Sewon Kang;James Varani

  • Looking older: Fibroblast collapse and therapeutic implications

    Gary J. Fisher;James Varani;John J. Voorhees

  • Role of endothelial-leukocyte adhesion molecule 1 (ELAM-1) in neutrophil-mediated lung injury in rats.

    M S Mulligan;J Varani;M K Dame;C L Lane

  • Collagen fragmentation promotes oxidative stress and elevates matrix metalloproteinase-1 in fibroblasts in aged human skin.

    Gary J. Fisher;Taihao Quan;Trupta Purohit;Yuan Shao

  • Effects of 5-fluorouracil and Mitomycin C on Cultured Rabbit Subconjunctival Fibroblasts

    Tetsuya Yamamoto;James Varani;H. Kaz Soong;Paul R. Lighter

  • Matrix Metalloproteinase‐1 is the Major Collagenolytic Enzyme Responsible for Collagen Damage in UV‐irradiated Human Skin¶

    Meghan Brennan;Humaa Bhatti;Kamalakar C. Nerusu;Narasimharao Bhagavathula

  • Inhibition of Type I Procollagen Synthesis by Damaged Collagen in Photoaged Skin and by Collagenase-Degraded Collagen in Vitro

    James Varani;Dara Spearman;Patricia Perone;Suzanne E.G. Fligiel

  • Pulmonary endothelial cell killing by human neutrophils. Possible involvement of hydroxyl radical.

    J. Varani;S. E G Fligiel;G. O. Till;R. G. Kunkel

  • Improvement of naturally aged skin with vitamin A (Retinol)

    Reza Kafi;Reza Kafi;Heh Shin R. Kwak;Heh Shin R. Kwak;Wendy E. Schumacher;Soyun Cho;Soyun Cho

  • Collagen degradation in aged/photodamaged skin in vivo and after exposure to matrix metalloproteinase-1 in vitro.

    Suzanne E.G. Fligiel;James Varani;Subhash C. Datta;Sewon Kang

  • Pomegranate as a cosmeceutical source: pomegranate fractions promote proliferation and procollagen synthesis and inhibit matrix metalloproteinase-1 production in human skin cells.

    Muhammad Nadeem Aslam;Ephraim Philip Lansky;James Varani

  • Aberrant production of interleukin-8 and thrombospondin-1 by psoriatic keratinocytes mediates angiogenesis

    Brian J. Nickoloff;Raj S. Mitra;James Varani;Vishva M. Dixit

  • Troglitazone Improves Psoriasis and Normalizes Models of Proliferative Skin Disease: Ligands for Peroxisome Proliferator-Activated Receptor-γ Inhibit Keratinocyte Proliferation

    Charles N. Ellis;James Varani;Gary J. Fisher;Mary E. Zeigler

  • Role of ERK and JNK pathways in regulating cell motility and matrix metalloproteinase 9 production in growth factor‐stimulated human epidermal keratinocytes

    Mary E. Zeigler;Yiqing Chi;Tanja Schmidt;James Varani

  • Endothelial cell killing by neutrophils. Synergistic interaction of oxygen products and proteases.

    J. Varani;I. Ginsburg;L. Schuger;D. F. Gibbs

Frequent Co-Authors

Kent J. Johnson
Kent J. Johnson University of Michigan–Ann Arbor
John J. Voorhees
John J. Voorhees University of Michigan–Ann Arbor
Peter A. Ward
Peter A. Ward University of Michigan–Ann Arbor
Gary J. Fisher
Gary J. Fisher University of Michigan–Ann Arbor
Brian J. Nickoloff
Brian J. Nickoloff Loyola University Chicago
Irwin J. Goldstein
Irwin J. Goldstein University of Michigan–Ann Arbor
James T. Elder
James T. Elder University of Michigan–Ann Arbor
Thomas E. Carey
Thomas E. Carey University of Michigan–Ann Arbor
Charles N. Ellis
Charles N. Ellis University of Michigan–Ann Arbor

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