User profiles for A.I. Birkhold

Annette Birkhold

Siemens Healthineers, Germany
Verified email at siemens-healthineers.com
Cited by 1374

Aging leads to a dysregulation in mechanically driven bone formation and resorption

H Razi, AI Birkhold, R Weinkamer… - Journal of Bone and …, 2015 - academic.oup.com
Physical activity is essential to maintain skeletal mass and structure, but its effect seems to
diminish with age. To test the hypothesis that bone becomes less sensitive to mechanical …

Diminished response to in vivo mechanical loading in trabecular and not cortical bone in adulthood of female C57Bl/6 mice coincides with a reduction in deformation …

BM Willie, AI Birkhold, H Razi, T Thiele, M Aido… - Bone, 2013 - Elsevier
Bone loss occurs during adulthood in both women and men and affects trabecular bone more
than cortical bone. The mechanism responsible for trabecular bone loss during adulthood …

The influence of age on adaptive bone formation and bone resorption

AI Birkhold, H Razi, GN Duda, R Weinkamer, S Checa… - Biomaterials, 2014 - Elsevier
Bone is a tissue with enormous adaptive capacity, balancing resorption and formation processes.
It is known that mechanical loading shifts this balance towards an increased formation, …

Mineralizing surface is the main target of mechanical stimulation independent of age: 3D dynamic in vivo morphometry

AI Birkhold, H Razi, GN Duda, R Weinkamer, S Checa… - Bone, 2014 - Elsevier
Mechanical loading can increase cortical bone mass by shifting the balance between bone
formation and resorption towards increased formation. With advancing age resorption …

[HTML][HTML] The periosteal bone surface is less mechano-responsive than the endocortical

AI Birkhold, H Razi, GN Duda, R Weinkamer… - Scientific reports, 2016 - nature.com
Dynamic processes modify bone micro-structure to adapt to external loading and avoid
mechanical failure. Age-related cortical bone loss is thought to occur because of increased …

Skeletal maturity leads to a reduction in the strain magnitudes induced within the bone: a murine tibia study

H Razi, AI Birkhold, P Zaslansky, R Weinkamer… - Acta biomaterialia, 2015 - Elsevier
Bone adapts to changes in the local mechanical environment (eg strains) through formation
and resorption processes. However, the bone adaptation response is significantly reduced …

Monitoring in vivo (re) modeling: a computational approach using 4D microCT data to quantify bone surface movements

AI Birkhold, H Razi, R Weinkamer, GN Duda, S Checa… - Bone, 2015 - Elsevier
Bone undergoes continual damage repair and structural adaptation to changing external loads
with the aim of maintaining skeletal integrity throughout life. The ability to monitor bone (re…

[HTML][HTML] Sost deficiency led to a greater cortical bone formation response to mechanical loading and altered gene expression

D Pflanz, AI Birkhold, L Albiol, T Thiele, C Julien… - Scientific reports, 2017 - nature.com
Bone adaptation optimizes mass and structure, but the mechano-response is already
reduced at maturation. Downregulation of sclerostin was believed to be a mandatory step in …

Tomography-based quantification of regional differences in cortical bone surface remodeling and mechano-response

AI Birkhold, H Razi, GN Duda, S Checa… - Calcified tissue …, 2017 - Springer
Bone has an adaptive capacity to maintain structural integrity. However, there seems to be a
heterogeneous cortical (re)modeling response to loading at different regions within the …

Effects of long-term sclerostin deficiency on trabecular bone mass and adaption to limb loading differ in male and female mice

…, A Büttner, D Pflanz, N Mikolajewicz, AI Birkhold… - Calcified tissue …, 2020 - Springer
A new therapeutic option to treat osteoporosis is focused on Wnt signaling and its inhibitor
sclerostin, a product of the Sost gene. In this work, we study the effect of sclerostin deficiency …