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Chao T, Wang ZX, Bowne WB, Yudkoff CJ, Torjani A, Swaminathan V, Kavanagh TR, Roadarmel A, Sholevar CJ, Cannaday S, Krampitz G, Zhan T, Gorgov E, Nevler A, Lavu H, Yeo CJ, Peiper SC, Jiang W. Association of Mutant KRAS Alleles With Morphology and Clinical Outcomes in Pancreatic Ductal Adenocarcinoma. Arch Pathol Lab Med 2024:499359. [PMID: 38452805 DOI: 10.5858/arpa.2023-0005-oa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2023] [Indexed: 03/09/2024]
Abstract
CONTEXT.— Mutant KRAS is the main oncogenic driver in pancreatic ductal adenocarcinomas (PDACs). However, the clinical and phenotypic implications of harboring different mutant KRAS alleles remain poorly understood. OBJECTIVE.— To characterize the potential morphologic and clinical outcome differences in PDACs harboring distinct mutant KRAS alleles. DESIGN.— Cohort 1 consisted of 127 primary conventional PDACs with no neoadjuvant therapy, excluding colloid/mucinous, adenosquamous, undifferentiated, and intraductal papillary mucinous neoplasm-associated carcinomas, for which an in-house 42-gene mutational panel had been performed. A morphologic classification system was devised wherein each tumor was assigned as conventional, papillary/large duct (P+LD, defined as neoplastic glands with papillary structure and/or with length ≥0.5 mm), or poorly differentiated (when the aforementioned component was 60% or more of the tumor). Cohort 2 was a cohort of 88 PDACs in The Cancer Genome Atlas, which were similarly analyzed. RESULTS.— In both cohorts, there was significant enrichment of P+LD morphology in PDACs with KRAS G12V and G12R compared with G12D. In the entire combined cohort, Kaplan-Meier analyses showed longer overall survival (OS) with KRAS G12R as compared with G12D (median OS of 1255 versus 682 days, P = .03) and in patients whose PDACs displayed P+LD morphology as compared with conventional morphology (median OS of 1175 versus 684 days, P = .04). In the adjuvant-only subset, KRAS G12R had the longest OS compared with G12D, G12V, and other alleles (median OS unreached/undefined versus 1009, 1129, and 1222 days, respectively). CONCLUSIONS.— PDACs with different mutant KRAS alleles are associated with distinct morphologies and clinical outcomes, with KRAS G12R allele associated with P+LD morphology and longer OS when compared with G12D using Kaplan-Meier studies.
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Affiliation(s)
- Timothy Chao
- From the Department of Pathology and Genomic Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Chao, Wang, Peiper, Jiang)
| | - Zi-Xuan Wang
- From the Department of Pathology and Genomic Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Chao, Wang, Peiper, Jiang)
| | - Wilbur B Bowne
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Clifford J Yudkoff
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Ava Torjani
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Vishal Swaminathan
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Taylor R Kavanagh
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Austin Roadarmel
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Cyrus J Sholevar
- Sidney Kimmel Medical College, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Yudkoff, Torjani, Swaminathan, Kavanagh, Roadarmel, Sholevar)
| | - Shawnna Cannaday
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Geoffrey Krampitz
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Tingting Zhan
- the Division of Biostatistics in the Department of Pharmacology & Experimental Therapeutics, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Zhan)
| | - Eliyahu Gorgov
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Avinoam Nevler
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Harish Lavu
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Charles J Yeo
- the Department of Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
| | - Stephen C Peiper
- From the Department of Pathology and Genomic Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Chao, Wang, Peiper, Jiang)
| | - Wei Jiang
- From the Department of Pathology and Genomic Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania(Chao, Wang, Peiper, Jiang)
- the Pancreatic, Biliary and Related Cancer Center, Sidney Kimmel Cancer Center, Jefferson Health, Philadelphia, Pennsylvania (Bowne, Cannaday, Krampitz, Gorgov, Nevler, Lavu, Yeo, Jiang)
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Micaily I, Blais EM, Cohen SJ, Cannaday S, Krampitz G, Wadlow RC, Shroff RT, McRee AJ, Chuy JW, Zheng L, Hendifar AE, Matrisian LM, Gregory GL, Thach D, Brody JR, Petricoin E, Pishvaian MJ, Lavu H, Yeo C, Basu Mallick A. Association of pancreatic adenocarcinoma location (head/body/tail) with DDR mutation status and response to platinum-based therapy. J Clin Oncol 2022. [DOI: 10.1200/jco.2022.40.4_suppl.612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
612 Background: Pancreatic adenocarcinoma is an aggressive disease with poor clinical prognosis that can originate from either the head (H) or body/tail (BT). Potential prognostic implications for H versus BT tumors have been reported; however, the molecular underpinnings associated with these differences in survival have not fully been explored. Using a large-scale real-world cohort of H and BT tumors with NGS results available from commercial labs, we retrospectively aim to identify potential differences between H and BT tumors in their response to standard therapies to help understand whether the treatment prioritization for pancreatic adenocarcinoma should take into account anatomical sidedness, as is recognized today with left-sided versus right-sided colorectal cancers. Methods: We analyzed outcomes across 1540 pts with NGS results from Perthera’s Real-World Evidence database who were diagnosed with PDAC originating from the H or BT. Progression-free survival (PFS) was evaluated from initiation of 1st line for advanced disease until discontinuation due to disease progression. Hazard ratios and p-values were computed via Cox regression when comparing PFS between 1st line FOLFIRINOX and gemcitabine/nab-paclitaxel. Differences in frequencies of genomic alterations between proximal and distal were analyzed by Fisher’s exact test. Results: Mutations in BRCA1/ BRCA2/ PALB2 were enriched (unadjusted p-value=0.017) in BT tumors (8.6% of 619) relative to H tumors (5.4% of 921). An expanded set of DDR pathway alterations (e.g. ATM, FANCA, CHEK2, BAP1, BRIP1, etc) were also enriched (unadjusted p-value=0.003) in BT tumors (21.4% of 619) relative to H tumors (15.6% of 921). In BT tumors, mPFS on 1st line FOLFIRINOX was longer (Table) than 1st line gemcitabine/nab-paclitaxel (p=0.0078) but this difference was not observed in H tumors (p=0.34). Overall survival data in these patients and an independent institutional cohort which motivated these analyses will also be discussed. Conclusions: DDR pathway alterations are known predictors of increased benefit from platinums and these real-world insights preliminarily suggest that DDR mutations are more common in BT vs. H. Prospective studies may be warranted to confirm the hypothesis-generating findings that platinum-based regimens should be prioritized in patients with BT tumors while underscoring the importance of routine NGS testing in both BT and H tumors given the prevalence of DDR pathway alterations on both sides of the pancreas.[Table: see text]
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Affiliation(s)
- Ida Micaily
- Thomas Jefferson University, Philadelphia, PA
| | | | | | | | | | | | | | | | | | - Lei Zheng
- Johns Hopkins Kimmel Cancer Center, Baltimore, MD
| | | | | | | | | | | | | | | | - Harish Lavu
- Thomas Jefferson University, Philadelphia, PA
| | - Charles Yeo
- Thomas Jefferson University, Philadelphia, PA
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Zheng R, Nauheim D, Bassig J, Chadwick M, Schultz CW, Krampitz G, Lavu H, Winter JR, Yeo CJ, Berger AC. ASO Author Reflections: Margin-Positive Pancreatic Ductal Adenocarcinoma During Pancreaticoduodenectomy: Additional Resection Does Not Improve Survival. Ann Surg Oncol 2020; 27:895-896. [PMID: 32813199 DOI: 10.1245/s10434-020-09031-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 08/09/2020] [Indexed: 11/18/2022]
Affiliation(s)
- Richard Zheng
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA.
| | - David Nauheim
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Jonathan Bassig
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Matthew Chadwick
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Christopher W Schultz
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Geoffrey Krampitz
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Harish Lavu
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Jordan R Winter
- Department of Surgery, University Hospitals Cleveland Medical Center and the Case Comprehensive Cancer Center, Cleveland, OH, USA
| | - Charles J Yeo
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Adam C Berger
- Department of Surgery, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
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Zheng R, Nauheim D, Bassig J, Chadwick M, Schultz CW, Krampitz G, Lavu H, Winter JR, Yeo CJ, Berger AC. Margin-Positive Pancreatic Ductal Adenocarcinoma during Pancreaticoduodenectomy: Additional Resection Does Not Improve Survival. Ann Surg Oncol 2020; 28:1552-1562. [PMID: 32779052 DOI: 10.1245/s10434-020-09000-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 07/19/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND The impact of resecting positive margins during pancreaticoduodenectomy (PD) for pancreatic ductal adenocarcinoma (PDA) remains debated. Additionally, the survival benefit of resecting multiple positive margins is unknown. METHODS We identified patients with PDA who underwent PD from 2006 to 2015. Pancreatic neck, bile duct, and uncinate frozen section margins were assessed before and after resection of positive margins. Survival curves were compared with log-rank tests. Multivariable Cox regression assessed the effect of margin status on overall survival. RESULTS Of 501 patients identified, 17.3%, 5.3%, and 19.7% had an initially positive uncinate, bile duct, or neck margin, respectively. Among initially positive bile duct and neck margins, 77.8% and 67.0% were resected, respectively. Although median survival was decreased among patients with any positive margins (15.6 vs. 20.9 months; p = 0.006), it was similar among patients with positive bile duct or neck margins with or without R1 to R0 resection (17.0 vs. 15.6 months; p = 0.20). Median survival with and without positive uncinate margins was 13.8 vs. 19.7 months (p = 0.04). Uncinate margins were never resected. Resection of additional margins when the uncinate was concurrently positive was not associated with improved survival (p = 0.37). Patients with positive margins who received adjuvant therapy had improved survival, regardless of margin resection (p = 0.03). Adjuvant therapy was independently protective against death (hazard ratio 0.6, 95% CI 0.5-0.7). CONCLUSIONS Positive PD margins at any position are associated with reduced overall survival; however, resection of additional margins may not improve survival, particularly with concurrently positive uncinate margins. Adjuvant chemotherapy improves survival with positive margins, regardless of resection.
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Affiliation(s)
- Richard Zheng
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA.
| | - David Nauheim
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Jonathan Bassig
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Matthew Chadwick
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Christopher W Schultz
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Geoffrey Krampitz
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Harish Lavu
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Jordan R Winter
- Department of Surgery, University Hospitals Cleveland Medical Center and the Case Comprehensive Cancer Center, Cleveland, OH, USA
| | - Charles J Yeo
- Department of Surgery, Thomas Jefferson University Hospital, Sidney Kimmel Medical College, Philadelphia University and Thomas Jefferson University, Philadelphia, PA, USA
| | - Adam C Berger
- Department of Surgery, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
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Abstract
Early diagnosis of multiple endocrine neoplasia (MEN) syndromes is critical for optimal clinical outcomes; before the MEN syndromes can be diagnosed, they must be suspected. Genetic testing for germline alterations in both the MEN type 1 (MEN1) gene and RET proto-oncogene is crucial to identifying those at risk in affected kindreds and directing timely surveillance and surgical therapy to those at greatest risk of potentially life-threatening neoplasia. Pancreatic, thymic, and bronchial neuroendocrine tumors are the leading cause of death in patients with MEN1 and should be aggressively considered by at least biannual computed tomography imaging.
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Affiliation(s)
- Jeffrey A Norton
- Department of Surgery, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA.
| | - Geoffrey Krampitz
- Department of Surgery, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA
| | - Robert T Jensen
- Cell Biology Section, Digestive Diseases Branch, National Institute of Arthritis, Diabetes, Digestive and Kidney Disease, National Institutes of Health, Bethesda, MD 20892-2560, USA
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00851.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00844.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00865.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00850.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Krampitz G, Böhme W, Kriesten K, Hardebeck W. Die Aminosäurenzusammensetzung von Reptilien-Eischalen in biochemischer und evolutiver Sicht. J ZOOL SYST EVOL RES 2009. [DOI: 10.1111/j.1439-0469.1974.tb00154.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kramer HJ, Krampitz G, Bäcker A, Meyer-Lehnert H. Ouabain-like factors in human urine: identification of a Na-K-ATPase inhibitor as vanadium-diascorbate adduct. Clin Exp Hypertens 1998; 20:557-71. [PMID: 9682912 DOI: 10.3109/10641969809053234] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We investigated endogenous Na-K-ATPase inhibitors, i.e. ouabain-like factors(OLFs), in the urine of salt-loaded healthy subjects. During an intake of > 30g NaCl/day 24h-urines were collected, lyophilized, redissolved and acidified to pH 3.5. With gelchromatography the inhibitory activity eluted in a post-salt fraction FIV from Sephadex G-25. When this fraction was again passed through Sephadex G-10, one of three OLFs eluted in the early subfractions FIV/1-2 close to H-ouabain and cross-reacted strongly with a ouabain antibody (NEN). Two additional OLFs with Mr around 400 eluted in a late subfraction FIV/8 which resolved after reverse-phase HPLC into a more polar OLF- (water phase) and a more apolar OLF-2 (20% acetonitrile). Only the more apolar OLF-2 cross-reacted with digoxin and ouabain antibodies. OLF-1 and OLF-2 purified to single compounds by preparative thin layer chromatography inhibited Na-K-ATPase with IC50 of around 1.5 x 10(-5) M and 1.5 x 10(-4) M, respectively. Identification of OLF-2 was first attempted because most material was available for further processing. Data from mass-spectroscopy, nuclear magnetic resonance (1H-NMR) and infrared spectroscopy characterized OLF-2 as structurally unrelated to ouabain but resembling ascorbic acid derivatives, i.e. vanadium (V) diascorbates (Mr 403) with similar elution times from RP-HPLC as OLF-2. They inhibited the enzyme in its E2-configuration with IC50 of 9 x 10(-5) M and 2 x 10(-6) M for V(IV)- and V(V)-diascorbate, respectively. OLF-1, OLF-2 and V-diascorbate raise intracellular free calcium in inner medullary collecting duct and vascular smooth muscle cells which also contract in vitro. V-diascorbate was also natriuretic in a bioassay. We suggest that V-diascorbates represent one of several OLFs excreted in human urine.
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MESH Headings
- Adult
- Animals
- Ascorbic Acid/analogs & derivatives
- Ascorbic Acid/chemistry
- Ascorbic Acid/pharmacology
- Ascorbic Acid/urine
- Biological Factors/chemistry
- Biological Factors/pharmacology
- Biological Factors/urine
- Calcium/metabolism
- Cardenolides
- Chromatography, Gel
- Chromatography, Thin Layer
- Digoxin
- Enzyme Inhibitors/chemistry
- Enzyme Inhibitors/pharmacology
- Enzyme Inhibitors/urine
- Female
- Humans
- Intracellular Fluid/metabolism
- Kidney Tubules, Collecting/cytology
- Kidney Tubules, Collecting/drug effects
- Kidney Tubules, Collecting/metabolism
- Male
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Organometallic Compounds/chemistry
- Organometallic Compounds/pharmacology
- Organometallic Compounds/urine
- Rats
- Saponins
- Sodium/metabolism
- Sodium Chloride/pharmacology
- Sodium-Potassium-Exchanging ATPase/antagonists & inhibitors
- Swine
- Vanadium/urine
- Vasoconstriction/drug effects
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Affiliation(s)
- H J Kramer
- Medical Policlinic/Department of Medicine, University of Bonn, Germany
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Heynck H, Krampitz G, Hesse A. Binding of calcium by brans under simulated gastrointestinal pH conditions. In vitro study with 45Ca. Eur J Clin Nutr 1995; 49 Suppl 3:S250-2. [PMID: 8549539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- H Heynck
- Experimentelle Urologie, Urologische Universitätsklinik, Bonn, Germany
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Kramer HJ, Krampitz G, Bäcker A, Krampitz G, Meyer-Lehnert H. Vanadium-diascorbates are strong candidates for endogenous ouabain-like factors in human urine: effects on Na-K-ATPase enzyme kinetics. Biochem Biophys Res Commun 1995; 213:289-94. [PMID: 7639747 DOI: 10.1006/bbrc.1995.2128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Recently, we isolated from the urine of salt-loaded healthy subjects a more polar ouabain-like factor OLF-1 and a more apolar OLF-2, the latter cross-reacted with a digoxin anti-body. They were purified to single compounds with dose-dependent Na-K-ATPase inhibition. Mass-spectroscopy (MS) showed a Mr of around 400 and 1H-NMR- and IR-spectroscopy suggested diascorbic acid salts, i.e., vanadium (V) diascorbates (Mr 403) with similar elution times from RP-HPLC as OLFs. IC50 was 9 x 10(-5)M for VIV-diascorbate as compared to 2 x 10(-6)M for Vv-diascorbate. Enzyme inhibition was non-competitive with respect to sodium and Mg-ATP; p-NPPase assay showed strong inhibition in its E2-configuration. We suggest that V-diascorbates represent endogenous OLFs excreted in human urine.
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Affiliation(s)
- H J Kramer
- Department of Anatomy and Physiology, Faculty of Agricultural Sciences, University of Bonn, Germany
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22
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Kramer HJ, Krampitz G, Bäcker A, Michel H, Krampitz G, Meyer-Lehnert H. Endogenous sodium pump inhibitors in human urine. Further identification of inhibitors of Na-K-ATPase. Am J Hypertens 1995; 8:753-60. [PMID: 7546503 DOI: 10.1016/0895-7061(95)00125-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
We investigated the presence of endogenous Na-K-ATPase inhibitor(s), ie, ouabain-like factors (OLFs), in the urine of salt-loaded healthy subjects. For this purpose 24-h urine was collected on days 3, 4, and 5 of high sodium intake (> 30 g NaCl/day). The samples then were lyophilized. Redissolved urine concentrates were acidified (pH 3.5) and subjected to gelchromatography on a Sephadex G-25 column where the OLFs eluted in the post-salt fraction IV. When lyophilized fraction IV was rechromatographed on Sephadex G-10, OLFs with molecular mass (M(r) of approximately 400 eluted in a late fraction IV/8 separate from added ouabain, ouabagenin (or digoxin), which eluted shortly after void volume. With the subsequent reverse-phase HPLC of fraction IV/8 a polar OLF-1 eluted in fraction IV/8a after the void volume in the water phase and a more apolar OLF-2 eluted at 20% acetonitrile in fraction IV/8d. Only the more apolar OLF-2 cross-reacted with a digoxin antibody. By preparative thin-layer chromatography OLF-1 and OLF-2 were purified as single compounds with potent dose-dependent Na-K-ATPase inhibition and Ki-values approximating 1.5 x 10(-5) mol/L and 1.5 x 10(-4) mol/L, respectively. Mass-spectroscopy (MS) showed M(r) of 391 and 1H-NMR characterized the endogenous urinary apolar OLF-2 as a compound that is structurally totally unrelated to ouabain; infrared (IR) spectroscopy of OLF-1 and OLF-2 also revealed no similarity with ouabain.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- H J Kramer
- Renal Section, Faculty of Agricultural Sciences, University of Bonn, Germany
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Kramer HJ, Bäcker A, Krampitz G, Meyer-Lehnert H, Michel H. [Endogenous natriuretic and ouabain-like factors. Their potential role in volume and blood pressure regulation]. Klin Wochenschr 1990; 68:1112-8. [PMID: 2177810 DOI: 10.1007/bf01798061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The existence of an endogenous natriuretic hormone and ouabain-like factors (OLF) has been postulated for many years. This postulate was based on our original observation that a small M.W. fraction in the serum after acute expansion of the extracellular fluid volume (ECFV) not only exhibited natriuretic activity but also inhibited the Na-K-ATPase enzyme in vitro similar to ouabain. Since then, numerous studies confirmed the presence of OLFs in serum, urine, cerebrospinal fluid, and various organs including the heart and hypothalamus. Some of these OLFs are well-known endogenous compounds, such as free unsaturated fatty acids, which inhibit in vitro transmembranous sodium transport, Na-K-ATPase and 3H-ouabain binding to its membrane receptor or cross-react with digoxin antibodies. Chemically yet undefined OLFs of potentially hypothalamic origin were detected in various models of experimental and clinical hypertension and are suggested to play a pathophysiological role especially in salt- and volume-dependent forms of hypertension. Our results show that OLFs isolated from the urine of salt-loaded healthy subjects strongly enhance basal and vasopressin-stimulated release of calcium in vascular smooth muscle cells and platelets similar to the effects we had observed with endothelin. This urine fraction also exhibits natriuretic activity which increases in parallel with sodium intake. Further chromatographic separation and amino acid analysis confirmed the peptidic nature (M.W. less than 1000) of the natriuretic factor(s). However, the two biological activities, namely natriuretic and ouabain-like activities, reside in distinct and chemically different compounds.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- H J Kramer
- Medizinische Poliklinik, Universität Bonn
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Abstract
1. Growth hormone (GH)-cDNA was synthesized from poly A(+)-mRNA extracts of chicken pituitary glands. 2. Chicken-cDNA library was cloned into E. coli. 3. Base sequence analysis of chicken GH-cDNA revealed only 70% similarity compared with duck GH-cDNA, and 97% similarity with a previously published chicken GH-cDNA sequence. 4. Dissimilarities in base sequences are primarily observed in the 3'-non-coding region of GH-cDNAs (chicken and duck). 5. Comparisons of amino acid sequences of chicken and duck GH exhibit only three substitutions, while the amino acid sequences of GHs of chicken are identical.
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Affiliation(s)
- D Baum
- Abteilung Biochemie, Universität Bonn, FRG
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Wieser D, Krampitz G. Estrogene aktivieren Eischalenprotein-Gene in der Leber von Legehennen. Reprod Domest Anim 1988. [DOI: 10.1111/j.1439-0531.1988.tb01113.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hesse A, Wurzel H, Krampitz G, Vahlensieck W. Experimental Determination of the Kinetics of Calcium-Binding With Chondroitin Sulphate and the Effects of Uric Acid on This Process. J Urol 1987. [DOI: 10.1016/s0022-5347(17)43444-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- A. Hesse
- Urologische Universitätsklinik, and Institut für Anatomie, Physiologie und Hygiene der Haustiere, Bonn University, Bonn, Federal Republic of Germany
| | - H. Wurzel
- Urologische Universitätsklinik, and Institut für Anatomie, Physiologie und Hygiene der Haustiere, Bonn University, Bonn, Federal Republic of Germany
| | - G. Krampitz
- Urologische Universitätsklinik, and Institut für Anatomie, Physiologie und Hygiene der Haustiere, Bonn University, Bonn, Federal Republic of Germany
| | - W. Vahlensieck
- Urologische Universitätsklinik, and Institut für Anatomie, Physiologie und Hygiene der Haustiere, Bonn University, Bonn, Federal Republic of Germany
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Hesse A, Wurzel H, Krampitz G, Vahlensieck W. Experimental determination of the kinetics of calcium-binding with chondroitin sulphate and the effects of uric acid on this process. Urol Res 1987; 15:93-7. [PMID: 3109095 DOI: 10.1007/bf00260940] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The calcium-binding kinetics of chondroitin sulphate C (CS) have been determined using equilibrium analysis including 45Ca. There is a linear relationship between the extent of the Ca binding and the concentration of CS present. 1 mumol CS disaccharide unit binds 0.757 mumol Ca. Scatchard plots of the data have revealed a single constant of dissociation (KD = 0.1429). In the presence of urate ions, and dependent on the pH value, the ability of CS to bind Ca may be impaired by as much as 31%. These measurements have supported the theory that urate ions interact with the GAGs in urine.
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Eckert J, Glock H, Schade R, Krampitz G, Enbergs H, Petersen J. Synthesis of a Precursor Polypeptide of Egg Shell Matrix in the Liver of Laying Hen. J Anim Physiol Anim Nutr (Berl) 1986. [DOI: 10.1111/j.1439-0396.1986.tb00571.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fischer P, Krampitz G. [Biochemical action mechanism of beryllium. 2. Beryllium binding in magnum of the laying hen]. Z Tierphysiol Tierernahr Futtermittelkd 1983; 50:113-24. [PMID: 6637159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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33
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Fischer P, Krampitz G. [Mechanism of the biochemical action of beryllium. 3. Beryllium binding in egg white]. Z Tierphysiol Tierernahr Futtermittelkd 1983; 50:125-31. [PMID: 6651928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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34
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Krampitz G, Seemayer N. [Analysis of the biological effect of city smog extract. VI. Comparative investigations on the effect of city smog extracts and their fractions on DNA synthesis of hamster kidney and embryonic cells and kidney cells of the primate Cercopithecus aethiops (author's transl)]. Zentralbl Bakteriol B Hyg Krankenhaushyg Betriebshyg Prav Med 1980; 170:1-16. [PMID: 7424254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We analyzed the effect of two samples of city smog extracts and their fractions from Duisburg on the rate of DNA synthesis of mammalian cell cultures. - We employed tissue cultures of kidney and embryonic cells from the Syrian golden hamster (Cricetus aureatus) and kidney cells from the African green monkey (Cercopithecus aethiops). The DNA synthesis was determined autoradiographically after incubation with 3H-thymidine. We found that both city smog extracts exerted a dose-dependent suppression of cellular DNA synthesis. Monkey kidney cells were more sensitive than rodent cells. Analysis of single fractions indicate that the inhibition of DNA synthesis is the result of combined effects of all fractions. At present time it is not possible to correlate the toxic effect of the complete extract special to a single fraction or compound group.
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Seemayer N, Krampitz G. [Autoradiographic investigations on the effect of city smog extract on DNA synthesis and cell cycle of mammalian cells in vitro. II. Alterations of the cell cycle of hamsters kidney cells and hamster embryonic cells in presence of city smog extract (author's transl)]. Zentralbl Bakteriol B 1979; 168:403-21. [PMID: 506558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We used the autoradiographic method according to Quastler and Sherman to analyse alterations in the cell cycle under the influence of city smog extracts. Investigations were performed on logarithmically growing cultures of kidney and embryonic cells of the Syrian golden hamster. Low concentrations of city smog extracts (0.125 micrograms/ml Benzo(a)pyren-equivalent) induced a remarkable delay of cell entrance into DNA-synthesis. Furthermore a considerable prolongation of generation time and phase of DNA-synthesis was detected. The number of mitosis was strongly reduced. Already a doubling of concentration of city smog extract caused an almost complete breakdown of the cell cycle and a disappearing of mitosis for a time period of 10 hours. Our results strongly indicate that city smog extracts lead to a severe alteration of the molecular biology of the cell. Taking this in consideration, it can be assumed that a long term exposure of human beings to the city smog could induce an injury of health.
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Krampitz G, Seemayer N. [Autoradiographic investigations on the effect of city smog extract on DNA synthesis and cell cycle of mammalian cells in vitro. I. Effect of city smog extract on DNA synthesis of kidney- and embryonic cells of the golden hamster in vitro (author's transl)]. Zentralbl Bakteriol B 1979; 168:239-55. [PMID: 484116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We analysed the effect of city smog extract from Düsseldorf on DNA synthesis of mammalian cells in vitro. Airborne dust was extracted with aceton and thereafter transferred to dimethylsulfoxide. Dosage was calculated according to the benzo(a)pyrene content. We used logarithmically growing cultures of hamster kidney and embryonic cells. DNA synthesis was determined autoradiographically by incorporation of 3H-Thymidine. We found that city smog extract exerted a dose-dependent cytotoxic effect leading to a decrease of DNA synthesizing cells. High concentrations of city smog extract induced cell necrosis and suppressed DNA synthesis completely. Moderate doses of extract caused a dose-dependent, but temporary cessation of DNA synthesis. Cells resumed DNA synthesis after a certain delay. Low concentrations of city smog extract induced no detectable effects. Inhibition of DNA synthesis was evident already one hour after addition of extract. Therefore a direct effect on DNA metabolism could be supposed. Furthermore, exposed cultures demonstrated a delay in entrance of new cells into the DNA synthesis. Alterations in DNA synthesis could be of great importance for carcinogenesis, especially if we take in consideration the content of carcinogens in city smog extract.
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de Ruiter N, Manojlovic N, Seemayer N, Krampitz G, Weisz H. [Analysis of the biological effect of city smog extract. II. Effect of a city smog extract on cell growth and DNA synthesis of hamster kidney cells in vitro (author's transl)]. Zentralbl Bakteriol Orig B 1978; 166:558-66. [PMID: 567914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A city smog extract from an urban area inhibits the cell growth of hamster kidney cells in vitro. Parallel to an inhibition of cell multiplication a diminished rate of total DNA synthesis appeared. The number of cells in DNA synthesis is depressed in presence of city smog extract. These phenomena revealed a dose-response relationship. The biological effect of city smog extract is discussed.
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Krampitz G, Weise K, Potz A, Engels J, Samata T, Becker K, Hedding M, Flajs G. Calcium-binding peptide in dinosaur egg shells. Naturwissenschaften 1977. [DOI: 10.1007/bf00450642] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Groneuer KJ, Krampitz G, Hardebeck H, Führ F. [Molecular biology studies on chick eggs. 5. Metabolism of uracil in chick embryos]. Z Tierphysiol Tierernahr Futtermittelkd 1974; 33:289-304. [PMID: 4471671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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40
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Groneuer KJ, Krampitz G, Hardebeck H, Führ F. [Molecular biological studies on hen's eggs. 4. Distribution of nucleic acids in chick embryos]. Z Tierphysiol Tierernahr Futtermittelkd 1974; 33:250-67. [PMID: 4410168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Krampitz G, Greuel E, Kriesten K, Hardebeck H, Engels J, Koester U, Helfgen I, Arbabi F. [Molecular biology of the egg shell matrix]. Berl Munch Tierarztl Wochenschr 1973; 86:313-4. [PMID: 4271114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Krampitz G, Hardebeck H. [Effect of polychlorinated hydrocarbons on the metabolism of warm-blooded animals. 3. Effect of polychlorinated insecticides on enzyme and hormone systems of mammals and birds]. Dtsch Tierarztl Wochenschr 1973; 80:108-12. [PMID: 4572496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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45
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Krampitz G, Hardebeck H. [Effect of polychlorinated hydrocarbons on the metabolism of warm-blooded animals. II. Metabolism of DDT and related compounds]. Dtsch Tierarztl Wochenschr 1973; 80:82-5. [PMID: 4573333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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46
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Krampitz G, Hardebeck H. [Effect of polychlorinated hydrocarbons on the metabolism of warm-blooded animals. 1. Persistent insecticides in the ecological systems]. Dtsch Tierarztl Wochenschr 1973; 80:14-6. [PMID: 4568287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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47
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Krampitz G, Hardebeck H, Greuel E, Kriesten K. [Molecular biology studies in hens' eggs. 2. Localization of protein synthesis systems in eggs of the domestic fowl]. Z Tierphysiol Tierernahr Futtermittelkd 1971; 27:316-27. [PMID: 5561289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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48
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Krampitz G, Baars-Diehl S, Haas W, Anda P. [Chemical synthesis of food components. 1. On the synthesis of nutritionally utilizable polypeptides]. Z Tierphysiol Tierernahr Futtermittelkd 1970; 26:33-44. [PMID: 5439798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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49
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Krampitz G, Baars S, Haas W, Kempfle M. [Condensation of aminoacyl-adenylates. A model for abiogenic protein synthesis]. Naturwissenschaften 1969; 56:416. [PMID: 5361993 DOI: 10.1007/bf00593626] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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50
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Krampitz G, Haas W, Baars-Diehl S. [Glutamic acid oxidoreductase activity of polyanhydro-alpha-amino acids (proteinoids)]. Naturwissenschaften 1968; 55:345-6. [PMID: 4386456 DOI: 10.1007/bf00600465] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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