M Kallenbach

Klinik für Gastroenterologie, Hepatologie und Infektiologie, Universitätsklinikum Düsseldorf, 40225 Dusseldorf, Germany.

50 publications 2008 – 2026 ORCID

What does M Kallenbach research?

M Kallenbach focuses on understanding how leaf-eating pests affect plant health, particularly looking at a plant called Nicotiana attenuata. When this plant is attacked by caterpillars, it suffers a significant reduction in its ability to store carbon energy, specifically sugar and starch, which are critical for growth. By studying the signaling pathways, such as jasmonate and auxin, M Kallenbach reveals why plants might struggle to regrow after pest attacks. This research is especially valuable for farmers and gardeners who want to enhance plant resilience against pests and improve crop yields.

Key findings

  • When attacked by caterpillars, the root sugar and starch levels of Nicotiana attenuata dropped by up to 50%.
  • The energy resources used in defense mechanisms significantly reduce the plant's growth and ability to produce flowers.
  • The study indicates that while plants can mount defenses against herbivores, these defenses come at a cost to their overall vitality and productivity.

Frequently asked questions

Does Dr Kallenbach study how pests affect plants?
Yes, Dr Kallenbach studies how leaf-eating pests impact the growth and energy storage of plants.
What specific plant does Dr Kallenbach research?
Dr Kallenbach researches the plant Nicotiana attenuata, examining its responses to caterpillar attacks.
How does this research help farmers?
This research helps farmers by providing insights into improving plant resistance to pests and optimizing crop growth.

Publications in plain English

Ultrasound measurements and normal values of the liver: a comprehensive review and practical guide.

2026

Medical ultrasonography

Möller K, Ludwig M, Jenssen C, Dong Y, Daum N +8 more

Plain English
This research paper reviewed how ultrasound is used to measure the liver and determined what normal liver sizes look like. The study emphasized the importance of consistent and accurate liver size assessments, noting that these measurements can help identify liver conditions and guide treatment decisions. It found that various factors like a person's body type, age, and ethnicity can affect liver size, and they highlighted the need for standardized measurement techniques to improve diagnosis. Who this helps: This helps doctors and patients by providing guidelines for better liver assessments.

PubMed

Differentiation of Gallbladder Adenomyomatosis and Polyps in a Western Cohort: Prevalence, Ultrasound Characteristics, and Diagnostic Challenges.

2026

JGH open : an open access journal of gastroenterology and hepatology

Neumann M, Kallenbach M, Morgera U, Cariati A, Morawietz L +7 more

Plain English
This study looked at two types of common, non-cancerous gallbladder growths—adenomyomatosis and polyps—to better understand how often they occur and how to identify them using ultrasound. Out of nearly 2,700 patients, adenomyomatosis was found in just 32 patients (1.2%), while polyps appeared in 123 patients (4.6%). Most of these growths were stable and very few required surgery, highlighting that the majority are benign and indicating that unnecessary surgeries can often be avoided. Who this helps: This benefits patients by reducing the chances of unnecessary gallbladder surgeries.

PubMed

Necrotizing (Abscessing) Lymphadenopathy and the Diagnostic Value of Contrast-Enhanced Ultrasound (CEUS): A Review with Clinical Vignettes.

2026

Diagnostics (Basel, Switzerland)

Görg C, Dong Y, Friedemann G, Jenssen C, Kallenbach M +4 more

Plain English
This study looked at a condition called necrotizing lymphadenopathy, which involves swelling of lymph nodes due to various diseases like infections or cancer. Researchers found that using a special type of ultrasound called contrast-enhanced ultrasound (CEUS) can help doctors differentiate between healthy and dead tissue more effectively than traditional methods. This is important because correctly identifying the cause can lead to better treatment decisions and avoid misdiagnosis. Who this helps: This benefits doctors and patients by improving diagnostic accuracy for conditions affecting lymph nodes.

PubMed

Artificial Intelligence for Contrast-Enhanced Ultrasound of the Liver: A Systematic Review.

2025

Digestion

Brooks JA, Kallenbach M, Radu IP, Berzigotti A, Dietrich CF +3 more

Plain English
This study looked at how artificial intelligence (AI) can improve the accuracy of contrast-enhanced ultrasound (CEUS) for examining the liver. Researchers reviewed 41 studies and found that AI models could classify liver lesions with accuracy rates between 58.6% and 98.9%. This is important because using AI can help doctors make better decisions when diagnosing liver conditions, potentially increasing the efficiency and reliability of CEUS exams. Who this helps: This helps doctors and patients who undergo liver examinations.

PubMed

Weakly Supervised Deep Learning Can Analyze Focal Liver Lesions in Contrast-Enhanced Ultrasound.

2025

Digestion

Oezsoy A, Brooks JA, van Treeck M, Doerffel Y, Morgera U +7 more

Plain English
This study looked at using artificial intelligence to help doctors determine whether liver tumors are cancerous or not during ultrasound exams. Researchers tested a new deep learning model on data from 370 patients and found that it could correctly identify malignant liver lesions with an accuracy of 80% and a high level of confidence, reaching a score of 0.94 in more than 90% of cases. This is important because accurate diagnosis can lead to better treatment decisions for patients with liver lesions. Who this helps: This helps doctors and patients dealing with liver conditions.

PubMed

Ultrasound of Bile Ducts-An Update on Measurements, Reference Values, and Their Influencing Factors.

2025

Diagnostics (Basel, Switzerland)

Lucius C, Flückiger A, Meier J, Möller K, Jenssen C +7 more

Plain English
This study looked at how to accurately measure bile ducts using ultrasound and what the normal size ranges should be for healthy people. It found that the common bile duct should generally measure between 5 and 9 mm in diameter, with a wall thickness of less than 1.5 mm considered normal. Understanding these measurements is important because it helps doctors identify potential problems with the bile ducts. Who this helps: This benefits doctors who perform ultrasound exams and patients being evaluated for bile duct issues.

PubMed

Efficacy of Individual Placement and Support (IPS) on Employment, Education, and Training in Young Adults With Early Psychosis-A Randomized Controlled Trial.

2025

Brain and behavior

Jäckel D, Bechdolf A, Burkhardt E, Kallenbach M, Gamig ML +2 more

Plain English
This study looked at how well a program called Individual Placement and Support (IPS) helps young adults with early psychosis find jobs, continue their education, or get training. It found that 78% of those in the IPS group were engaged in these activities for at least 15 hours a week, compared to 55% in the standard care group. Additionally, those in the IPS program were employed for an average of 31.5 weeks and earned about €10,242, while the standard care group averaged only 18.4 weeks and €5,217. Who this helps: This benefits young adults with early psychosis seeking support for employment and education.

PubMed

Measurement and Normal Values, Pathologies, Interpretation of findings, and Interventional Ultrasound as part of student ultrasound education.

2025

Zeitschrift fur Gastroenterologie

Gschmack AM, Karlas T, Lucius C, Barth G, Blaivas M +17 more

Plain English
This research paper looks at how to improve ultrasound training for medical students, specifically focusing on abdominal exams. The authors argue for standardizing what students learn, including how to measure findings, recognize different health issues, and handle incorrect results. They also emphasize the importance of teaching students about interventional ultrasound (INVUS) procedures early in their education. Who this helps: This benefits medical students and ultimately their future patients by improving the quality of ultrasound diagnoses.

PubMed

Artificial intelligence predicts outcome-related molecular profiles and vascular invasion in hepatocellular carcinoma.

2025

JHEP reports : innovation in hepatology

Seraphin TP, Mesropian A, Žigutytė L, Brooks J, Mauro E +13 more

Plain English
This study looked at how artificial intelligence (AI) can analyze routine tissue samples from patients with liver cancer (hepatocellular carcinoma) to predict their outcomes. The AI model was trained on data from 431 cancer cases and successfully distinguished between patients with better and worse prognoses, showing areas under the curve (AUC) scores between 0.72 and 0.80 in external tests. This matters because it can help doctors make better treatment decisions for patients based on their cancer's characteristics. Who this helps: This benefits patients with liver cancer and their treating physicians.

PubMed

[Contrast-enhanced ultrasound (CEUS) for characterisation of focal liver lesions].

2024

Zeitschrift fur Gastroenterologie

Kallenbach M, Qvartskhava N, Weigel C, Dörffel Y, Berger J +2 more

Plain English
This study looked at how contrast-enhanced ultrasound (CEUS) can be used to better identify and understand focal liver lesions, which are abnormal growths in the liver. The researchers found that CEUS is an effective and cost-efficient tool that allows doctors to see blood flow in real time, helping them make more informed decisions. They believe that using CEUS could lead to better diagnosis and management of liver conditions, especially when performed by doctors who are familiar with the patient's history. Who this helps: This helps patients with liver lesions by providing more accurate diagnoses and treatment options.

PubMed

Student ultrasound education - current views and controversies.

2024

Ultraschall in der Medizin (Stuttgart, Germany : 1980)

Dietrich CF, Sirli RL, Barth G, Blaivas M, Daum N +24 more

Plain English
This paper looks at how medical students are trained in using ultrasound, a key tool for doctors in diagnosing health issues. It finds that there is a lack of consistency in ultrasound education across different medical schools, which can affect the quality of clinical practice. Establishing a standardized curriculum for ultrasound training in medical studies is crucial for ensuring that future doctors are well-prepared to use this important tool effectively. Who this helps: Patients benefit from better-trained doctors who can perform ultrasound exams accurately.

PubMed

Subjective experiences of an acceptance and mindfulness-based group intervention (Feel-Good-Group) in young people with early psychosis.

2024

Frontiers in psychiatry

von Hardenberg L, Leopold K, Pfennig A, Kuhn C, Kallenbach M +3 more

Plain English
This study looked at how young people with early psychosis felt about a mindfulness therapy program called the Feel-Good Group. Ten participants shared their experiences 16 weeks after completing the program, and they reported feeling better overall, especially regarding their emotions. They suggested that the therapy could be even more effective with a more structured approach and less time spent on assessments. Who this helps: This research benefits young patients dealing with early psychosis, as well as the therapists who work with them.

PubMed

Salivary Cortisol Dynamics After Mild Traumatic Brain Injury.

2023

The Journal of head trauma rehabilitation

Musacchio S, Kallenbach MD, Huber DL, Raff H, Johnson BD +4 more

Plain English
This study looked at how mild traumatic brain injury (mTBI) affects cortisol levels in saliva, both when at rest and in response to stress from thinking tasks and exercise. Researchers found that people with mTBI had higher resting cortisol levels (1.67 nmol/L) compared to healthy individuals (1.30 nmol/L) and showed a stronger cortisol reaction to exercise one week after the injury. Understanding these changes in cortisol can help improve rehabilitation strategies for individuals recovering from mTBI. Who this helps: This benefits patients recovering from mild traumatic brain injuries and their healthcare providers.

PubMed

Relationship Between Neighborhood Disadvantage and Mild Traumatic Brain Injury Symptoms.

2023

The Journal of head trauma rehabilitation

Miller T, Kallenbach MD, Huber DL, Brett BL, Nelson LD

Plain English
This study looked at how living in a disadvantaged neighborhood affects the severity of symptoms in people with mild traumatic brain injury (mTBI). Researchers found that individuals from the most disadvantaged areas reported significantly more symptoms—measured by a score of 18.4—compared to those from less disadvantaged neighborhoods, where the score was just 10.1, even after considering factors like gender and health insurance. This is important because it highlights that where a person lives can seriously impact their recovery from brain injuries. Who this helps: Patients with mild traumatic brain injuries and their healthcare providers.

PubMed

Different Response Behavior to Therapeutic Approaches in Homozygotic Wilson's Disease Twins with Clinical Phenotypic Variability: Case Report and Literature Review.

2022

Genes

Samadzadeh S, Kruschel T, Novak M, Kallenbach M, Hefter H

Plain English
This study looked at two identical twins who both have Wilson's disease, a condition that causes copper buildup in the body. The twins had very different symptoms and responded differently to treatment: one sister suffered severe health issues, including loss of mobility and speech, while the other did not show symptoms. Despite similar genetic backgrounds, the twin's experiences highlight the unpredictable nature of Wilson's disease and the need for tailored treatments for patients even when they share the same genes. Who this helps: This research benefits patients with Wilson's disease and their doctors by illustrating the need for personalized treatment plans.

PubMed

Feasibility and efficacy of an acceptance and mindfulness-based group intervention for young people with early psychosis (Feel-Good group).

2022

Frontiers in psychiatry

von Hardenberg L, Leopold K, Stenzel N, Kallenbach M, Aliakbari N +2 more

Plain English
This study looked at a mindfulness-based group therapy called the Feel-Good group for young people experiencing early psychosis. After participating in eight therapy sessions, the 36 patients showed better control over their emotions and a reduction in psychotic symptoms, with improvements seen in emotional goal achievement scores (around 79% improvement) and overall psychotic symptoms (74% improvement) at the end of the treatment. This is important because finding effective new treatments for early psychosis can lead to better outcomes for young patients. Who this helps: Patients with early psychosis.

PubMed

Phytohormones and volatile organic compounds, like geosmin, in the ectomycorrhiza of Tricholoma vaccinum and Norway spruce (Picea abies).

2021

Mycorrhiza

Abdulsalam O, Wagner K, Wirth S, Kunert M, David A +4 more

Plain English
This study looked at how the fungus Tricholoma vaccinum communicates with Norway spruce trees, focusing on specific compounds it produces. The researchers found that the fungus releases several unexpected chemicals, including geosmin and phytohormones such as salicylic acid and ethylene, which help improve the connection between the tree and the fungus. These findings show that maintaining the right levels of these chemicals is crucial for successful relationships between plants and fungi. Who this helps: This research benefits patients who rely on healthy forests and ecosystems, as it increases our understanding of plant-fungal interactions.

PubMed

Stability of hippocampal subfield volumes after trauma and relationship to development of PTSD symptoms.

2021

NeuroImage

Weis CN, Webb EK, Huggins AA, Kallenbach M, Miskovich TA +5 more

Plain English
This study looked at the hippocampus, a brain area important for PTSD, to see if the sizes of its different parts (subfields) change after trauma and if those changes relate to PTSD symptoms. Researchers studied 215 trauma victims and discovered that while the measurements of these subfields were consistent and reliable, there was no direct link between their sizes and PTSD symptoms. This finding is important because it suggests that measuring these subfields may not be a helpful way to predict or understand PTSD, especially depending on when the measurements are taken. Who this helps: Patients experiencing trauma and PTSD.

PubMed

Neural impact of neighborhood socioeconomic disadvantage in traumatically injured adults.

2021

Neurobiology of stress

Webb EK, Weis CN, Huggins AA, Fitzgerald JM, Bennett K +7 more

Plain English
This study looked at how living in a poor neighborhood affects the brains of adults who have recently suffered a traumatic injury. Researchers found that those in disadvantaged areas showed changes in brain volume and function, particularly in regions that help process emotions, even when accounting for personal socioeconomic status and symptoms of post-traumatic stress. This matters because understanding these effects can guide future research and policies aimed at improving recovery for people in similar situations. Who this helps: This helps patients recovering from traumatic injuries living in low-income neighborhoods.

PubMed

Hospitalization for epistaxis: a population-based healthcare research study in Thuringia, Germany.

2020

European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery

Kallenbach M, Dittberner A, Boeger D, Buentzel J, Kaftan H +5 more

Plain English
This study looked at severe nosebleeds (epistaxis) that require hospital treatment in Thuringia, Germany, focusing on data from 840 patients treated in 2016. It found that men are more likely to be hospitalized for this condition than women, with the highest rate among men over 85 years old (222 per 100,000). Key factors that led to longer hospital stays included the location of the bleeding and experiencing more bleeding while in the hospital, indicating a need for better treatment guidelines. Who this helps: This information benefits doctors by helping them improve treatment approaches for patients experiencing severe nosebleeds.

PubMed

[Service Use of an Early Intervention Centre, Clinical and Sociodemographic Characteristics of Young Adults with Early Psychosis with and without Migration Background].

2019

Psychiatrische Praxis

Zarafonitis-Müller S, Leopold K, Batra M, Kallenbach M, Burkhardt E +2 more

Plain English
This study looked at young adults with early signs of psychosis who used the Early Intervention and Treatment Centre (FRITZ) in Berlin, comparing those with and without a migration background. Out of 60 patients studied, 35% were migrants, who tended to adapt better socially but had less insight into their illness and fewer hospital admissions. The findings suggest that FRITZ is effective for both groups, but understanding the specific needs of migrant patients could improve treatment practices. Who this helps: This helps doctors and healthcare providers in tailoring treatment for young adults with early psychosis, especially those from migrant backgrounds.

PubMed

[GRADE: Evidence to Decision (EtD) frameworks - a systematic and transparent approach to making well informed healthcare choices. 2: Clinical guidelines].

2019

Zeitschrift fur Evidenz, Fortbildung und Qualitat im Gesundheitswesen

Conrad S, Kaiser L, Kallenbach M, Meerpohl J, Morche J

Plain English
This study looks at a method called the Evidence to Decision (EtD) frameworks, which helps create clinical guidelines by clearly showing how recommendations are made based on the best evidence. It highlights three main parts: defining the question, evaluating the evidence, and understanding other important factors, such as the pros and cons of a treatment. The findings emphasize that by using this structured approach, healthcare professionals can make better recommendations, leading to more informed choices for patients. Who this helps: Doctors, patients, and healthcare providers benefit from clearer and more reliable treatment guidelines.

PubMed

[GRADE: Using evidence to decision frameworks for adoption, adaptation and de novo generation of trustworthy guideline recommendations - GRADE-ADOLOPMENT].

2019

Zeitschrift fur Evidenz, Fortbildung und Qualitat im Gesundheitswesen

Kallenbach M, Conrad S, Hoffmann F, Matthias K, Gartlehner G +2 more

Plain English
This study looked at how health organizations can create reliable guidelines for medical practices by either using existing guidelines, adapting them, or making new ones from scratch. They used a specific method called GRADE that helps evaluate the strength of recommendations, resulting in 22 new practice guidelines completed in about six months. This approach helps ensure that guidelines are based on solid evidence and are tailored to local contexts, making them more effective and trustworthy. Who this helps: This benefits doctors and healthcare providers by giving them reliable, evidence-based guidelines to follow in their practice.

PubMed

First Feasibility Analysis of Ballistocardiography on a Passenger Flight.

2019

Studies in health technology and informatics

Wolf MC, Jähne-Raden N, Gütschleg H, Kulau U, Kallenbach M +1 more

Plain English
This study looked at using a technique called Ballistocardiography (BCG) to monitor the heart activity of passengers during a flight. Researchers tested this method by tracking a healthy passenger's heart data and found that the BCG results were useful even in the noisy airplane environment, confirming its accuracy when compared to standard heart monitoring pictures called electrocardiograms (ECGs). This is important because it suggests that BCG could be a viable option for monitoring heart health during flights, potentially improving passenger safety. Who this helps: This helps passengers and medical teams address heart health during air travel.

PubMed

Impact of Allogeneic Stem Cell Transplantation in First Complete Remission in Acute Myeloid Leukemia: A National Population-Based Cohort Study.

2018

Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation

Østgård LSG, Lund JL, Nørgaard JM, Nørgaard M, Medeiros BC +7 more

Plain English
This study looked at how well allogeneic stem cell transplantation (HSCT) works compared to just chemotherapy in patients with acute myeloid leukemia (AML) who were in their first complete remission. Researchers found that out of 1,031 patients, those who received HSCT had a lower relapse rate of 24% compared to 49% for those who only had chemotherapy. Additionally, patients who underwent HSCT lived longer, with significantly better survival rates across different age groups and risk levels. Who this helps: This benefits patients with acute myeloid leukemia, offering them a better chance at survival post-treatment.

PubMed

Maize Stem Response to Long-Term Attack by.

2018

Frontiers in plant science

Rodriguez VM, Padilla G, Malvar RA, Kallenbach M, Santiago R +1 more

Plain English
This research studied how maize plants defend themselves over a long period when attacked by corn borers, a type of pest. The findings showed that, over time, the plants activate specific genes and pathways that help them produce protective chemicals, both reducing damage and making the corn less appealing to insects. In particular, certain proteins play a key role in this response, helping the plants handle harmful substances generated during the attack. Who this helps: This benefits farmers and agricultural researchers focused on improving crop resilience against pests.

PubMed

Functional variation in a key defense gene structures herbivore communities and alters plant performance.

2018

PloS one

Adam N, Kallenbach M, Meldau S, Veit D, van Dam NM +2 more

Plain English
This study looked at how the differences in a specific plant gene related to defense against pests affect both the plants and the insects that feed on them. Researchers found that when wild tobacco plants had a gene that helps produce defense hormones silenced, they were more vulnerable to pests, but surprisingly, this change also influenced how other herbivores interacted with these plants. In mixed groups of normal and gene-silenced plants, overall seed production was more stable, showing that combining different plant types can help improve growth and resilience against pests. Who this helps: This benefits farmers and agricultural scientists looking to enhance crop resilience and productivity.

PubMed

[Not Available].

2018

Zeitschrift fur Gastroenterologie

Lynen Jansen P, Kallenbach M, Dignass A, Kucharzik T

PubMed

Sex ratio of mirid populations shifts in response to hostplant co-infestation or altered cytokinin signaling .

2017

Journal of integrative plant biology

Adam N, Erler T, Kallenbach M, Kaltenpoth M, Kunert G +2 more

Plain English
This study looked at how two insect species—one that can eat a variety of plants and one that specializes on a specific plant—interact when they share the same host plant, which in this case is tobacco. Researchers found that when the generalist leafhopper was present, the offspring of the specialist insect, Tupiocoris notatus, shifted to a higher number of males, changing from a typical female-heavy ratio. This change was linked to plant growth factors and could help explain how insect populations adapt to their environments. Who this helps: This research benefits ecologists and agricultural scientists looking to understand pest management and crop interactions.

PubMed

Olive fruits infested with olive fly larvae respond with an ethylene burst and the emission of specific volatiles.

2016

Journal of integrative plant biology

Alagna F, Kallenbach M, Pompa A, De Marchis F, Rao R +3 more

Plain English
This study looked at how olives respond when attacked by olive fly larvae, which are a major pest for olive trees. Researchers found that infested olives produce more ethylene gas and release specific chemicals to defend themselves, with 12-oxo-phytodienoic acid levels increasing significantly. Understanding this response is important because it could lead to new ways to protect olive crops, ultimately helping to improve olive production and quality. Who this helps: This helps olive farmers and the olive oil industry.

PubMed

High-throughput quantification of more than 100 primary- and secondary-metabolites, and phytohormones by a single solid-phase extraction based sample preparation with analysis by UHPLC-HESI-MS/MS.

2016

Plant methods

Schäfer M, Brütting C, Baldwin IT, Kallenbach M

Plain English
This study developed a new method that allows scientists to measure over 100 different compounds in plants, including important hormones and nutrients, more quickly and with less starting material than before. They tested this method on tobacco plants, which are known for having complex chemical profiles, and found it effectively captured a wide range of metabolites, helping researchers see how plants adapt to their environments. This is important because understanding plant metabolism can aid in improving crop quality and resilience. Who this helps: This helps plant biologists and agricultural scientists.

PubMed

Application of Silicone Tubing for Robust, Simple, High-throughput, and Time-resolved Analysis of Plant Volatiles in Field Experiments.

2015

Bio-protocol

Kallenbach M, Veit D, Eilers EJ, Schuman MC

Plain English
This study explored a new method for collecting plant odors, known as plant volatiles, in natural settings using affordable silicone tubing. The researchers found that this silicone tubing can effectively capture these odors over short periods, giving accurate and meaningful results when analyzed with existing technology. This approach is significant because it makes studying plant interactions in the wild easier and more cost-effective compared to traditional methods that require expensive equipment. Who this helps: This benefits researchers studying plant ecology and interactions with the environment.

PubMed

How scent and nectar influence floral antagonists and mutualists.

2015

eLife

Kessler D, Kallenbach M, Diezel C, Rothe E, Murdock M +1 more

Plain English
This study looked at how the smell and sweetness of flowers affect both pollinators and plant-eating insects. Researchers found that while floral scent and nectar help attract pollinators and boost reproduction, they also draw in herbivores that can harm the plant. Specifically, nectar was more effective than scent in increasing the number of moths that lay eggs on the plant, illustrating a trade-off for the plants between attracting beneficial pollinators and harmful herbivores. Who this helps: This research helps farmers and botanists understand flower traits better to improve crop yields and plant health.

PubMed

[Should antipsychotics be used in prodromal stages of schizophrenia to prevent psychosis? Con].

2015

Der Nervenarzt

Bechdolf A, Laier S, Kallenbach M, Biester A, Leopold K

PubMed

The Nicotiana attenuata GLA1 lipase controls the accumulation of Phytophthora parasitica-induced oxylipins and defensive secondary metabolites.

2014

Plant, cell & environment

Schuck S, Kallenbach M, Baldwin IT, Bonaventure G

Plain English
This study looked at how a specific gene, GLA1, in a type of tobacco plant affects its chemical response to infections from a harmful plant pathogen called Phytophthora parasitica. Researchers found that plants with reduced GLA1 produced about 20 times less of certain protective chemicals (oxylipins) during the infection compared to normal plants, which likely makes them less able to defend themselves against disease. This is important because it shows how plants manage their defenses differently depending on the type of threat they face, which could help in developing disease-resistant crops. Who this helps: This helps farmers and agricultural scientists working on improving crop resilience against diseases.

PubMed

A robust, simple, high-throughput technique for time-resolved plant volatile analysis in field experiments.

2014

The Plant journal : for cell and molecular biology

Kallenbach M, Oh Y, Eilers EJ, Veit D, Baldwin IT +1 more

Plain English
This study focused on a new, simple method to measure plant chemicals, called volatile compounds, in real outdoor settings. Researchers found that using cheap silicone tubing for sampling can capture these plant emissions accurately and quickly, allowing for better understanding of how plants communicate with their environment. This is important because it helps scientists study plant responses to various factors without the limitations of lab settings. Who this helps: This benefits researchers studying plant interactions and environmental responses.

PubMed

Impact of chemotherapy delay on short- and long-term survival in younger and older AML patients: a Danish population-based cohort study.

2014

Leukemia

Ostgard LS, Nørgaard JM, Sengeløv H, Holm MS, Jensen MK +4 more

PubMed

Benefits and risks of colorectal cancer screening.

2014

Oncology research and treatment

Riemann JF, Schröder C, Kallenbach M, Giersiepen K, Schmoll HJ

PubMed

Duplication of isodicentric chromosome 13, idic(13)(p11.2), leading to pentasomy 13q in acute myeloid leukemia without maturation.

2013

Cytogenetic and genome research

Kjeldsen E, Kallenbach M

Plain English
This study focused on a rare genetic change in a type of blood cancer called acute myeloid leukemia (AML) that lacks the usual maturation of cells. Researchers found that in a unique case, the cancer cells had two copies of a specific chromosome abnormality, leading to an extra copy of a part of chromosome 13, which may influence the disease's development. This finding is significant because it highlights a potential new genetic abnormality linked to worse outcomes in patients with this type of leukemia. Who this helps: This helps doctors and researchers understand more about AML and could lead to better treatment options for patients.

PubMed

Jasmonate signaling in the field, part I: elicited changes in jasmonate pools of transgenic Nicotiana attenuata populations.

2013

Methods in molecular biology (Clifton, N.J.)

Gaquerel E, Stitz M, Kallenbach M, Baldwin IT

Plain English
This study looked at how a wild tobacco plant, Nicotiana attenuata, responds to insect attacks by managing certain plant hormones called jasmonates. The researchers developed methods to measure these hormonal changes in the plant when it's attacked by herbivores. They found that specific genetic modifications affected how the plant produces and uses jasmonates, which are crucial for its survival in its natural environment. Who this helps: This research benefits plant biologists and ecologists studying plant resilience in changing ecosystems.

PubMed

Jasmonate signaling in the field, part II: insect-guided characterization of genetic variations in jasmonate-dependent defenses of transgenic and natural Nicotiana attenuata populations.

2013

Methods in molecular biology (Clifton, N.J.)

Gaquerel E, Stitz M, Kallenbach M, Baldwin IT

Plain English
This study looked at how genetic modifications in a wild tobacco plant, Nicotiana attenuata, affect its defenses against insects in natural settings. Researchers found that plants altered to have reduced jasmonate levels, a chemical involved in plant defense, attracted more pests, specifically leafhoppers, which prefer these weaker plants. This research is important because understanding how these defenses work can improve plant breeding and pest management in agriculture. Who this helps: This helps farmers and agricultural scientists.

PubMed

Feeding-induced rearrangement of green leaf volatiles reduces moth oviposition.

2013

eLife

Allmann S, Späthe A, Bisch-Knaden S, Kallenbach M, Reinecke A +3 more

Plain English
This study looked at how the scents released by plants change when they are eaten by insects, and how these changes affect moths' choices of where to lay their eggs. Researchers found that tobacco hornworm moths preferred to lay their eggs on plants that had a specific scent (the chemical (Z)-3-hexenyl acetate) rather than a different scent ((E)-2-hexenyl acetate). This is important because it shows that moths can use these plant signals to find safer places for their offspring, helping them avoid competition and predators. Who this helps: This benefits agricultural scientists and farmers by providing insights into pest management.

PubMed

Progressive 35S promoter methylation increases rapidly during vegetative development in transgenic Nicotiana attenuata plants.

2013

BMC plant biology

Weinhold A, Kallenbach M, Baldwin IT

Plain English
This research studied how the expression of certain genes in genetically modified wild tobacco plants changes during their growth. The scientists found that in three specific lines of these plants, the gene responsible for producing antimicrobial peptides stopped working more than 200 times less after just one generation, mainly due to a process called methylation, which silenced the gene. This is important because it helps in understanding how to manage genetically modified plants better, especially when they need to be stable and show consistent traits for agricultural and ecological research. Who this helps: This benefits researchers and farmers working with genetically modified plants.

PubMed

Leaf-herbivore attack reduces carbon reserves and regrowth from the roots via jasmonate and auxin signaling.

2013

The New phytologist

Machado RA, Ferrieri AP, Robert CA, Glauser G, Kallenbach M +2 more

Plain English
This study examined how attacks by leaf-eating pests affect the ability of plants to store energy and grow back. Researchers found that when the plant Nicotiana attenuata was attacked by a specific caterpillar, its root sugar and starch levels dropped by up to 50%, leading to less regrowth and fewer flowers. This is important because it reveals that while plants can defend themselves against pests, doing so can significantly drain their energy resources, impacting their growth. Who this helps: This information benefits farmers and gardeners seeking to manage plant health and pest resistance.

PubMed

Empoasca leafhoppers attack wild tobacco plants in a jasmonate-dependent manner and identify jasmonate mutants in natural populations.

2012

Proceedings of the National Academy of Sciences of the United States of America

Kallenbach M, Bonaventure G, Gilardoni PA, Wissgott A, Baldwin IT

Plain English
This study looked at how a type of leafhopper insect chooses its food, specifically wild tobacco plants. Researchers found that when these plants lack a plant hormone called jasmonic acid (JA), they become more appealing to leafhoppers, with plants unable to produce JA attacked more heavily in nature. Understanding this interaction helps reveal the genetic differences in plants related to defense mechanisms, which is important for plant survival and resilience. Who this helps: This helps farmers and botanists seeking to protect crops from insect pests.

PubMed

C12 derivatives of the hydroperoxide lyase pathway are produced by product recycling through lipoxygenase-2 in Nicotiana attenuata leaves.

2011

The New phytologist

Kallenbach M, Gilardoni PA, Allmann S, Baldwin IT, Bonaventure G

Plain English
This study examined how certain compounds are produced in the leaves of a plant called Nicotiana attenuata when they face stress from injury or being eaten by insects. Researchers found that after such stress, 98% of one specific compound, called (9Z)-traumatin, was transformed into another compound which has some reactive properties. This conversion is essential because these compounds play a significant role in the plant's response to damage, helping it to adjust and defend itself. Who this helps: This helps scientists and agricultural professionals understand how plants respond to stress, which can inform strategies for improving crop resilience.

PubMed

Nicotiana attenuata SIPK, WIPK, NPR1, and fatty acid-amino acid conjugates participate in the induction of jasmonic acid biosynthesis by affecting early enzymatic steps in the pathway.

2010

Plant physiology

Kallenbach M, Alagna F, Baldwin IT, Bonaventure G

Plain English
This study looked at how specific proteins and compounds in the plant Nicotiana attenuata affect the production of jasmonic acid (JA), a chemical that helps plants respond to damage from insects and wounds. The researchers found that the proteins SIPK and NPR1 play important roles in starting the production of JA after a plant is wounded, while another protein, WIPK, helps convert an early form of JA into a further product but doesn’t influence its initial production. This research is important because understanding these processes can help improve plant health and resistance against pests. Who this helps: This benefits farmers and agricultural scientists working to enhance crop resilience.

PubMed

Rapid modification of the insect elicitor N-linolenoyl-glutamate via a lipoxygenase-mediated mechanism on Nicotiana attenuata leaves.

2010

BMC plant biology

VanDoorn A, Kallenbach M, Borquez AA, Baldwin IT, Bonaventure G

Plain English
This study looked at how a specific compound, N-linolenoyl-glutamate, from the saliva of a caterpillar affects the defense responses in a wild tobacco plant after it's been injured. The research found that when the compound is applied to the plant's wounds, about 50 to 70% of it gets modified within 30 seconds. These changes lead to the creation of new compounds that help the plant produce a chemical called jasmonic acid, which boosts its defense responses against caterpillars. Who this helps: This benefits plants by improving their defenses against herbivores.

PubMed

A rapid and sensitive method for the simultaneous analysis of aliphatic and polar molecules containing free carboxyl groups in plant extracts by LC-MS/MS.

2009

Plant methods

Kallenbach M, Baldwin IT, Bonaventure G

Plain English
Researchers developed a new method to analyze two types of important molecules found in plants: free aliphatic molecules (like free fatty acids) and small polar molecules (such as jasmonic and salicylic acids). This new technique allows them to identify and measure these compounds simultaneously and efficiently from very small plant samples without extra steps. They tested this method on Nicotiana attenuata plant leaves and successfully detected 16 different compounds, providing a simpler way to study plant chemistry, which is important for understanding plant growth and responses. Who this helps: This benefits plant scientists and researchers studying plant processes and responses.

PubMed

Epicardial versus transvenous left ventricular lead placement in patients receiving cardiac resynchronization therapy: results from a randomized prospective study.

2008

The Thoracic and cardiovascular surgeon

Doll N, Piorkowski C, Czesla M, Kallenbach M, Rastan AJ +2 more

Plain English
This study compared two methods of placing a heart device in patients who need cardiac resynchronization therapy: one method involves threading a lead through a vein, and the other involves placing it directly on the heart muscle. Researchers analyzed 80 patients and found that those who had the lead placed through the vein had shorter stays in the intensive care unit (less than a day on average versus almost 4 days) and needed less time on a breathing machine. Both methods were effective, but the vein method is generally simpler and should be the preferred choice unless there are complications with the veins. Who this helps: This helps patients with heart problems who need this therapy.

PubMed

Publication data sourced from PubMed . Plain-English summaries generated by AI. Not medical advice.