Robert Ritzel

8.2k citations

57 papers · 6.5k indexed · 2 hit papers · h-index 25

Impact in

Endocrinology, Diabetes and Metabolism top 0.2%
- Diabetes Treatment and Management
- Diabetes Management and Research
- Diet, Metabolism, and Disease
Surgery top 0.5%
- Pancreatic function and diabetes

Papers in ⓘ

Endocrinology, Diabetes and Metabolism 42
- Diabetes Management and Research 34
- Diabetes Treatment and Management 28
- Hyperglycemia and glycemic control in critically ill and hospitalized patients 7
Surgery 28
- Pancreatic function and diabetes 25

Co-authors: Peter C. Butler (11 shared papers)Alexandra E. Butler (2 shared papers)Robert A. Rizza (2 shared papers)Susan Bonner‐Weir (1 shared paper)Juliette Janson (1 shared paper)Michael A. Nauck (12 shared papers)Jens J. Holst (10 shared papers)Wolff Schmiegel (10 shared papers)
Journals: Diabetes (9 papers)Diabetes Obesity and Metabolism (6 papers)The Journal of Clinical Endocrinology & Metabolism (5 papers)Diabetes Care (5 papers)Diabetologia (4 papers)
Partner nations: Germany United States France

In The Last Decade

Robert Ritzel

53 papers receiving 6.3k citations

Hit Papers

align trajectories log scale

β-Cell Deficit and Increased β-Cell Apoptosis in Humans With Type 2 Diabetes 2003 · 3.2k citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2003 Diabetes
1997 American Journal of Physiology-Endocrinology and Metabolism

Peers

Countries citing papers authored by Robert Ritzel

Since Specialization

Citations

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

Fields of papers citing papers by Robert Ritzel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside Robert Ritzel, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Robert Ritzel Line = papers co-authored together Robert Ritzel links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 57 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	β-Cell Deficit and Increased β-Cell Apoptosis in Humans With Type 2 Diabetes Diabetes ·Alexandra E. Butler, Juliette Janson, Susan Bonner‐Weir, Robert Ritzel, Robert A. Rizza, Peter C. Butler Hit paper breakdown →	2003	3227
2	Glucagon-like peptide 1 inhibition of gastric emptying outweighs its insulinotropic effects in healthy humans American Journal of Physiology-Endocrinology and Metabolism ·Michael A. Nauck, Ulrich Niedereichholz, Rainer Ettler, Jens J. Holst, Cathrine Ørskov, Robert Ritzel, Wolff Schmiegel Hit paper breakdown →	1997	678
3	Effects of Glucagon-Like Peptide 1 on Counterregulatory Hormone Responses, Cognitive Functions, and Insulin Secretion during Hyperinsulinemic, Stepped Hypoglycemic Clamp Experiments in Healthy Volunteers The Journal of Clinical Endocrinology & Metabolism ·Michael A. Nauck, Markus M. Heimesaat, Kai Behle, Jens J. Holst, Markus Nauck, Robert Ritzel, M. Hüfner, Wolff Schmiegel	2002	471
4	Pharmacokinetic, insulinotropic, and glucagonostatic properties of GLP-1 [7?36 amide] after subcutaneous injection in healthy volunteers. Dose-response-relationships Diabetologia ·Robert Ritzel, C. �rskov, Jens J. Holst, Michael A. Nauck	1995	177
5	Patient‐level meta‐analysis of the EDITION 1, 2 and 3 studies: glycaemic control and hypoglycaemia with new insulin glargine 300 U/ml versus glargine 100 U/ml in people with type 2 diabetes Diabetes Obesity and Metabolism ·Robert Ritzel, Ronan Roussel, Geremia B. Bolli, Laetitia Vinet, Claire Brulle‐Wohlhueter, Stanislav Glezer, Hannele Yki‐Järvinen	2015	173
6	Human Islet Amyloid Polypeptide Oligomers Disrupt Cell Coupling, Induce Apoptosis, and Impair Insulin Secretion in Isolated Human Islets Diabetes ·Robert Ritzel, Juris J. Meier, Chia‐Yu Lin, Johannes D. Veldhuis, Peter C. Butler	2006	161
7	Relationship Between β-Cell Mass and Fasting Blood Glucose Concentration in Humans Diabetes Care ·Robert Ritzel, Alexandra E. Butler, Robert A. Rizza, Johannes D. Veldhuis, Peter C. Butler	2006	147
8	More Similarities Than Differences Testing Insulin Glargine 300 Units/mL Versus Insulin Degludec 100 Units/mL in Insulin-Naive Type 2 Diabetes: The Randomized Head-to-Head BRIGHT Trial Diabetes Care ·Julio Rosenstock, Alice Cheng, Robert Ritzel, Zsolt Bosnyák, Christine Devisme, Anna M. G. Cali, Jochen Sieber, Péter Stella, Xiangling Wang, Juan P. Frías, Ronan Roussel, Geremia B. Bolli	2018	140
9	Activated protein C ameliorates diabetic nephropathy by epigenetically inhibiting the redox enzyme p66 ^Shc Proceedings of the National Academy of Sciences ·Fabian Bock, Khurrum Shahzad, Hongjie Wang, Stoyan Stoyanov, Juliane Wolter, Wei Dong, Pier Giuseppe Pelicci, Muhammed Kashif, Satish Ranjan, Simone Schmidt, Robert Ritzel, Vedat Schwenger, Klaus G. Reymann, Charles T. Esmon, Thati Madhusudhan, Peter P. Nawroth, Berend Isermann	2012	110
10	Prolonged and enhanced secretion of glucagon-like peptide 1 (7-36 amide) after oral sucrose due to α-glucosidase inhibition (acarbose) in Type 2 diabetic patients Diabetic Medicine ·C. Seifarth, Jean‐François Bergmann, Jens J. Holst, Robert Ritzel, Wolff Schmiegel, Michael A. Nauck	1998	109
11	Influence of glucagon-like peptide 1 on fasting glycemia in type 2 diabetic patients treated with insulin after sulfonylurea secondary failure. Diabetes Care ·Michael A. Nauck, Axel Sauerwald, Robert Ritzel, Jens J. Holst, Wolff Schmiegel	1998	95
12	Impaired islet turnover in human donor pancreata with aging European Journal of Endocrinology ·Christina Reers, Saskia Erbel, Iréne Esposito, Bruno M. Schmied, Markus W. Büchler, Peter P. Nawroth, Robert Ritzel	2008	91
13	Replication Increases β-Cell Vulnerability to Human Islet Amyloid Polypeptide-Induced Apoptosis Diabetes ·Robert Ritzel, Peter C. Butler	2003	90
14	Pancreatic β-Cells Secrete Insulin in Fast- and Slow-Release Forms Diabetes ·Darren J. Michael, Robert Ritzel, Leena Haataja, Robert H. Chow	2006	80
15	Induction of β-Cell Rest by a Kir6.2/SUR1-Selective K_ATP-Channel Opener Preserves β-Cell Insulin Stores and Insulin Secretion in Human Islets Cultured at High (11 mM) Glucose The Journal of Clinical Endocrinology & Metabolism ·Robert Ritzel, John Bondo Hansen, Johannes D. Veldhuis, Peter C. Butler	2004	64
16	Better glycaemic control and less hypoglycaemia with insulin glargine 300 U/mL vs glargine 100 U/mL : 1‐year patient‐level meta‐analysis of the EDITION clinical studies in people with type 2 diabetes Diabetes Obesity and Metabolism ·Robert Ritzel, Ronan Roussel, Andrea Giaccari, Jiten Vora, Claire Brulle‐Wohlhueter, Hannele Yki‐Järvinen	2017	61
17	α‐Glucosidase inhibition (acarbose) fails to enhance secretion of glucagon‐like peptide 1 (7–36 amide) and to delay gastric emptying in Type 2 diabetic patients Diabetic Medicine ·Katrin Hücking, Z. Kostic, Christian Pox, Robert Ritzel, Jens J. Holst, Wolff Schmiegel, Michael A. Nauck	2005	48
18	Glucagon-Like Peptide 1 Increases Secretory Burst Mass of Pulsatile Insulin Secretion in Patients With Type 2 Diabetes and Impaired Glucose Tolerance Diabetes ·Robert Ritzel, Miriam Schulte, Niels Pörksen, Markus Nauck, Jens J. Holst, Claus Bogh Juhl, Winfried März, Ole Schmitz, Wolff Schmiegel, Michael A. Nauck	2001	48
19	Glucose Stimulates Pulsatile Insulin Secretion from Human Pancreatic Islets by Increasing Secretory Burst Mass: Dose-Response Relationships The Journal of Clinical Endocrinology & Metabolism ·Robert Ritzel, Johannes D. Veldhuis, Peter C. Butler	2003	46
20	Pulsatile Insulin Secretion by Human Pancreatic Islets The Journal of Clinical Endocrinology & Metabolism ·Soon H Song, Lise Kjems, Robert Ritzel, Susan McIntyre, Michael L. Johnson, Johannes D. Veldhuis, Peter C. Butler	2002	44

About Robert Ritzel

Robert Ritzel is a scholar working on Endocrinology, Diabetes and Metabolism, Surgery, Genetics, Transplantation and Gastroenterology, having authored 57 papers that have together received 6.5k indexed citations. Recurring topics across this work include Diabetes Management and Research (34 papers), Diabetes Treatment and Management (28 papers), Pancreatic function and diabetes (25 papers), Diabetes and associated disorders (15 papers), Metabolism, Diabetes, and Cancer (10 papers), Hyperglycemia and glycemic control in critically ill and hospitalized patients (7 papers), Pancreatic and Hepatic Oncology Research (3 papers) and Neuroendocrine Tumor Research Advances (3 papers). The work is most often cited by research in Endocrinology, Diabetes and Metabolism (3.9k citations), Surgery (4.2k citations), Genetics (1.8k citations), Endocrine and Autonomic Systems (306 citations) and Physiology (915 citations). Robert Ritzel has collaborated with scholars based in Germany, United States and France. Frequent co-authors include Peter C. Butler, Alexandra E. Butler, Robert A. Rizza, Susan Bonner‐Weir, Juliette Janson, Michael A. Nauck, Jens J. Holst, Wolff Schmiegel, Johannes D. Veldhuis and Cathrine Ørskov. Their work appears in journals such as Diabetes, Diabetes Obesity and Metabolism, The Journal of Clinical Endocrinology & Metabolism, Diabetes Care and Diabetologia.

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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