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Tsujioka Y, Handa A, Nishimura G, Nozaki T, Miyazaki O, Kono T, Bixby SD, Jinzaki M. Pediatric Ribs at Chest Radiography: Normal Variants and Abnormalities. Radiographics 2023; 43:e230076. [PMID: 37943700 DOI: 10.1148/rg.230076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Normal variants and abnormalities of the ribs are frequently encountered on chest radiographs. Accurate identification of normal variants is crucial to avoid unnecessary investigations. A meticulous evaluation of rib abnormalities can provide valuable insights into the patient's symptoms, and even when no osseous condition is suspected, rib abnormalities may offer critical clues to underlying conditions. Rib abnormalities are associated with various conditions, including benign tumors, malignant tumors, infectious and inflammatory conditions, vascular abnormalities, metabolic disorders, nonaccidental injuries, malformation syndromes, and bone dysplasias. Abnormalities of the ribs are classified into three groups based on their radiographic patterns: focal, multifocal, and diffuse changes. Focal lesions are further subdivided into nonaggressive lesions, aggressive lesions, and infectious and inflammatory disorders. Radiologists should be aware of individual disorders of the pediatric ribs, including their imaging findings, relevant clinical information, and underlying pathogenesis. Differential diagnoses are addressed as appropriate. Since chest radiographs can suffice for diagnosis in certain cases, the authors emphasize a pattern recognition approach to radiographic interpretation. However, additional cross-sectional imaging may be necessary for focal lesions such as tumors or inflammatory conditions. Awareness of disease-specific imaging findings helps ascertain the nature of the lesion and directs appropriate management. ©RSNA, 2023 Quiz questions for this article are available in the supplemental material.
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Affiliation(s)
- Yuko Tsujioka
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Atsuhiko Handa
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Gen Nishimura
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Taiki Nozaki
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Osamu Miyazaki
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Tatsuo Kono
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Sarah D Bixby
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
| | - Masahiro Jinzaki
- From the Department of Radiology, Keio University School of Medicine, Tokyo, Japan (Y.T., T.N., M.J.); Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan (Y.T., T.K.); Department of Radiology, Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 (A.H., S.D.B.); Department of Radiology, Musashino-Yowakai Hospital, Tokyo, Japan (G.N.); and Department of Radiology, National Center for Child Health and Development, Tokyo, Japan (O.M.)
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Wang YY, Claessens LPAM, Sullivan C. Deep reptilian evolutionary roots of a major avian respiratory adaptation. Commun Biol 2023; 6:3. [PMID: 36650231 PMCID: PMC9845227 DOI: 10.1038/s42003-022-04301-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 11/25/2022] [Indexed: 01/19/2023] Open
Abstract
Vertebral ribs of the anterior thorax in extant birds bear bony prongs called uncinate processes, which improve the mechanical advantage of mm. appendicocostales to move air through the immobile lung and pneumatic air sacs. Among non-avian archosaurs, broad, cartilaginous uncinate processes are present in extant crocodylians, and likely have a ventilatory function. Preserved ossified or calcified uncinate processes are known in several non-avian dinosaurs. However, whether other fossil archosaurs possessed cartilaginous uncinate processes has been unclear. Here, we establish osteological correlates for uncinate attachment to vertebral ribs in extant archosaurs, with which we inferred the presence of uncinate processes in at least 19 fossil archosaur taxa. An ancestral state reconstruction based on the infer distribution suggests that cartilaginous uncinate processes were plesiomorphically present in Dinosauria and arguably in Archosauria, indicating that uncinate processes, and presumably their ventilatory function, have a deep evolutionary history extending back well beyond the origin of birds.
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Affiliation(s)
- Yan-yin Wang
- grid.17089.370000 0001 2190 316XDepartment of Biological Sciences, CW 405 Biological Sciences Building, University of Alberta, Edmonton, AB T6G 2E9 Canada
| | - Leon P. A. M. Claessens
- grid.5012.60000 0001 0481 6099Maastricht Science Programme, Faculty of Science and Engineering, Maastricht University, Maastricht, The Netherlands
| | - Corwin Sullivan
- grid.17089.370000 0001 2190 316XDepartment of Biological Sciences, CW 405 Biological Sciences Building, University of Alberta, Edmonton, AB T6G 2E9 Canada ,Philip J. Currie Dinosaur Museum, Wembley, AB T0H 3S0 Canada
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Khabyuk J, Pröls F, Draga M, Scaal M. Development of ribs and intercostal muscles in the chicken embryo. J Anat 2022; 241:831-845. [PMID: 35751554 PMCID: PMC9358761 DOI: 10.1111/joa.13716] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/06/2022] [Accepted: 06/06/2022] [Indexed: 11/27/2022] Open
Abstract
In the thorax of higher vertebrates, ribs and intercostal muscles play a decisive role in stability and respiratory movements of the body wall. They are derivatives of the somites, the ribs originating in the sclerotome and the intercostal muscles originating in the myotome. During thorax development, ribs and intercostal muscles extend into the lateral plate mesoderm and eventually contact the sternum during ventral closure. Here, we give a detailed description of the morphogenesis of ribs and thoracic muscles in the chicken embryo (Gallus gallus). Using Alcian blue staining as well as Sox9 and Desmin whole‐mount immunohistochemistry, we monitor synchronously the development of rib cartilage and intercostal muscle anlagen. We show that the muscle anlagen precede the rib anlagen during ventrolateral extension, which is in line with the inductive role of the myotome in rib differentiation. Our studies furthermore reveal the temporary formation of a previously unknown eighth rib in the chicken embryonic thorax.
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Affiliation(s)
- Julia Khabyuk
- Faculty of Medicine and University Hospital Cologne, Center of Anatomy, University of Cologne, Cologne, Germany
| | - Felicitas Pröls
- Faculty of Medicine and University Hospital Cologne, Center of Anatomy, University of Cologne, Cologne, Germany
| | - Margarethe Draga
- Faculty of Medicine and University Hospital Cologne, Center of Anatomy, University of Cologne, Cologne, Germany
| | - Martin Scaal
- Faculty of Medicine and University Hospital Cologne, Center of Anatomy, University of Cologne, Cologne, Germany
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Double-layered two-directional somatopleural cell migration during chicken body wall development revealed with local fluorescent tissue labeling. Anat Sci Int 2022; 97:380-390. [DOI: 10.1007/s12565-022-00652-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/05/2022] [Indexed: 11/01/2022]
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Sawada I, Sato I, Kawata S, Nagahori K, Omotehara T, Yakura T, Li ZL, Itoh M. Characteristic expression of CGRP and osteogenic and vasculogenic markers in the proximal and distal regions of the rib during male mouse development. Ann Anat 2021; 240:151883. [PMID: 34915119 DOI: 10.1016/j.aanat.2021.151883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/19/2021] [Accepted: 12/09/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Neuropeptide calcitonin gene-related peptide (CGRP) is a neurotransmitter related to vasculogenesis and osteogenesis during bone formation and organ development. From the foetal period to the postnatal period, the thorax, which is necessary for lung respiration, forms. The thorax exhibits the same cartilage ossification as the bones of the extremities, but a specific system within the thorax exists as costal cartilage after birth. The relationship among CGRP, osteogenesis and vasculogenic markers in the two rib locations during thorax formation is not fully understood. MATERIALS AND METHODS In our study, male mice were used to provide ribs under different development conditions on various embryonic days (E12. 5, E14.5, and E17.5) and postnatal days (P1 and P5). The mRNA expression levels of CGRP, vascular endothelial growth factor (VEGF-A), type 1 collagen (Col1a-1), type 2 collagen (Col2a1), neuropeptide Y (NPY), osteocalcin (OCN) and osteopontin (OPN) were analysed by qRT-PCR. We also analysed the mRNA expression of CGRP, VEGF-A and OPN by in situ hybridization. Multivariate modelling with principal component analysis (PCA) was performed to estimate the interactions among the quantitative real-time RT-PCR data. RESULTS The mRNA expression levels of CGRP, VEGF-A, Col2a, Col1a-1, OCN, and NPY in the male mouse rib gradually increased during development. An antisense probe for CGRP mRNA was strongly detected in the central region of the mouse rib at E12.5 and the hypertrophic and ossification zones at E17.5 by in situ hybridization. VEGF-A was also located in the same region as CGRP at E12.5 and E17.5. OPN was strongly detected at the rib formation stage from E14.5 to E17.5. The expression of CGRP also differed between the proximal and distal regions of the rib at E17.5. As demonstrated by in situ hybridization, CGRP continuously participates in cartilage formation in the distal regions of the rib after birth. The PCA revealed that the mRNA expression of CGRP was related to that of Col1a-1 and VEGF-A during rib formation. CONCLUSION This study shows that CGRP is involved in vascular and bone formation during rib development and may also be involved in cartilage formation after birth. The findings suggest that CGRP may temporarily participate in bone formation and continuously participate in cartilage formation in the rib, which may also be related to the formation of the anterior thoracic wall after birth.
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Affiliation(s)
- Iori Sawada
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Iwao Sato
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan.
| | - Shinichi Kawata
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Kenta Nagahori
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Takuya Omotehara
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Tomiko Yakura
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Zhong-Lian Li
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
| | - Masahiro Itoh
- Department of Anatomy, Tokyo Medical University, 6-1-1, Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
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Costal cartilage ensures low degradation of DNA needed for genetic identification of human remains retrieved at different decomposition stages and different postmortem intervals. POSTEP HIG MED DOSW 2021. [DOI: 10.2478/ahem-2021-0035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Introduction
The study aimed to evaluate if costal cartilage is a good source of DNA for genetic individual identification tests performed in forensic autopsies.
Materials and Methods
The study included samples of costal cartilage collected from 80 cadavers retrieved from different environments: indoors (flat/hospital), outdoors (primarily in the forest), a coal mine, a fire site, uninhabited buildings, a basement, bodies of fresh water, exhumation sites, and unknown locations. After isolation of DNA chondrocytes, T. Large autosomal chromosome (214 bp), T. Small autosomal chromosome (80 bp), and the Y chromosome (75 bp; for male cadavers), sequences were amplified using real-time PCR. Additionally, 23 autosomal short tandem repeat (STR) loci and 16 Y chromosome STR loci were amplified using multiplex PCR. Forensic DNA typing was done using capillary electrophoresis and all results were analyzed.
Results
There was no statistically significant difference in DNA concentration after T. Large, T. Small autosomal chromosome and the Y chromosome amplification between samples collected from cadavers retrieved from different environments. The DNA degradation index was the same regardless of the postmortem interval. The results show that it is possible to generate a full genetic profile from costal cartilage samples collected from cadavers retrieved from different environments and at different times elapsed after death.
Conclusions
The results suggest that costal cartilage can be routinely collected during forensic autopsies, especially from cadavers at the advanced decomposition stage.
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Xue X, Zhao S, Li K, Zhao B. Intrathoracic rib: rare rib anomaly, review of the literature and proposal for classification. Int J Med Sci 2021; 18:3800-3807. [PMID: 34790056 PMCID: PMC8579300 DOI: 10.7150/ijms.63828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/21/2021] [Indexed: 11/25/2022] Open
Abstract
Background: Intrathoracic ribs are very rare congenital anomalies, and often discovered incidentally on chest X-ray. Since its first description by Lutz in 1947, approximately 50 cases have been reported in the literature till date. The aim is to review the all reported intrathoracic ribs, summarize their clinical features, and propose a potential classification. Methods: All relevant literatures were searched and reviewed. The terms include intrathoracic rib, intrathoracic bifid rib, trans-thoracic rib and intrathoracic rib anomaly. We have summarized the first finding events, origination, distribution, related anomalies and imaging features of intrathoracic rib, and propose an updated classification. Results: The patients' age at initial finding was from six weeks to 79 years old. Of all, sixty percent was less than 30 years old. There was no difference in gender. Most of them were reported by authors in western countries (85.3%, 58/68), and incidental findings by radiologist and respiratory physician. The intrathoracic rib occurs more frequently on the right side, and is usually single and unilateral. According to the new classification, type I and II was account for 45.6% and 35.3%, respectively. Conclusion: Intrathoracic rib is rare findings in clinical practice. It is useful that radiologists or clinician are familiarized with the imaging appearances of these malformations. These anomalies reflect some disturbances during the embryo development, leading us to propose a potential classification that could contribute to a better understanding of this rib anomaly.
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Affiliation(s)
- Xuhong Xue
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030001, P.R. China
| | - Sheng Zhao
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030001, P.R. China
| | - Kai Li
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030001, P.R. China
| | - Bin Zhao
- Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030001, P.R. China
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Scaal M. Development of the amniote ventrolateral body wall. Dev Dyn 2020; 250:39-59. [PMID: 32406962 DOI: 10.1002/dvdy.193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 12/16/2022] Open
Abstract
In vertebrates, the trunk consists of the musculoskeletal structures of the back and the ventrolateral body wall, which together enclose the internal organs of the circulatory, digestive, respiratory and urogenital systems. This review gives an overview on the development of the thoracic and abdominal wall during amniote embryogenesis. Specifically, I briefly summarize relevant historical concepts and the present knowledge on the early embryonic development of ribs, sternum, intercostal muscles and abdominal muscles with respect to anatomical bauplan, origin and specification of precursor cells, initial steps of pattern formation, and cellular and molecular regulation of morphogenesis.
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Affiliation(s)
- Martin Scaal
- Faculty of Medicine, Institute of Anatomy II, University of Cologne, Cologne, Germany
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Lézot F, Corre I, Morice S, Rédini F, Verrecchia F. SHH Signaling Pathway Drives Pediatric Bone Sarcoma Progression. Cells 2020; 9:cells9030536. [PMID: 32110934 PMCID: PMC7140443 DOI: 10.3390/cells9030536] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/19/2020] [Accepted: 02/23/2020] [Indexed: 02/07/2023] Open
Abstract
Primary bone tumors can be divided into two classes, benign and malignant. Among the latter group, osteosarcoma and Ewing sarcoma are the most prevalent malignant primary bone tumors in children and adolescents. Despite intensive efforts to improve treatments, almost 40% of patients succumb to the disease. Specifically, the clinical outcome for metastatic osteosarcoma or Ewing sarcoma remains poor; less than 30% of patients who present metastases will survive 5 years after initial diagnosis. One common and specific point of these bone tumors is their ability to deregulate bone homeostasis and remodeling and divert them to their benefit. Over the past years, considerable interest in the Sonic Hedgehog (SHH) pathway has taken place within the cancer research community. The activation of this SHH cascade can be done through different ways and, schematically, two pathways can be described, the canonical and the non-canonical. This review discusses the current knowledge about the involvement of the SHH signaling pathway in skeletal development, pediatric bone sarcoma progression and the related therapeutic options that may be possible for these tumors.
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Matsutani K, Ikegami K, Aoyama H. An in vitro model of region-specific rib formation in chick axial skeleton: Intercellular interaction between somite and lateral plate cells. Mech Dev 2019; 159:103568. [PMID: 31493459 DOI: 10.1016/j.mod.2019.103568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 07/22/2019] [Accepted: 08/30/2019] [Indexed: 11/30/2022]
Abstract
The axial skeleton is divided into different regions based on its morphological features. In particular, in birds and mammals, ribs are present only in the thoracic region. The axial skeleton is derived from a series of somites. In the thoracic region of the axial skeleton, descendants of somites coherently penetrate into the somatic mesoderm to form ribs. In regions other than the thoracic, descendants of somites do not penetrate the somatic lateral plate mesoderm. We performed live-cell time-lapse imaging to investigate the difference in the migration of a somite cell after contact with the somatic lateral plate mesoderm obtained from different regions of anterior-posterior axis in vitro on cytophilic narrow paths. We found that a thoracic somite cell continues to migrate after contact with the thoracic somatic lateral plate mesoderm, whereas it ceases migration after contact with the lumbar somatic lateral plate mesoderm. This suggests that cell-cell interaction works as an important guidance cue that regulates migration of somite cells. We surmise that the thoracic somatic lateral plate mesoderm exhibits region-specific competence to allow penetration of somite cells, whereas the lumbosacral somatic lateral plate mesoderm repels somite cells by contact inhibition of locomotion. The differences in the behavior of the somatic lateral plate mesoderm toward somite cells may confirm the distinction between different regions of the axial skeleton.
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Affiliation(s)
- Kaoru Matsutani
- Department of Anatomy and Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Koji Ikegami
- Department of Anatomy and Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Hirohiko Aoyama
- Department of Anatomy and Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; Department of Medical Science and Technology, Faculty of Health Sciences, Hiroshima International University, 555-36 Kurosegakuendai, Higashihiroshima City, Hiroshima 739-2695, Japan.
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Kague E, Hughes SM, Lawrence EA, Cross S, Martin-Silverstone E, Hammond CL, Hinits Y. Scleraxis genes are required for normal musculoskeletal development and for rib growth and mineralization in zebrafish. FASEB J 2019; 33:9116-9130. [PMID: 31100023 PMCID: PMC6662971 DOI: 10.1096/fj.201802654rr] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/15/2019] [Indexed: 01/19/2023]
Abstract
Tendons are an essential part of the musculoskeletal system, connecting muscle and skeletal elements to enable force generation. The transcription factor scleraxis marks vertebrate tendons from early specification. Scleraxis-null mice are viable and have a range of tendon and bone defects in the trunk and limbs but no described cranial phenotype. We report the expression of zebrafish scleraxis orthologs: scleraxis homolog (scx)-a and scxb in cranial and intramuscular tendons and in other skeletal elements. Single mutants for either scxa or scxb, generated by clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9), are viable and fertile as adult fish. Although scxb mutants show no obvious phenotype, scxa mutant embryos have defects in cranial tendon maturation and muscle misalignment. Mutation of both scleraxis genes results in more severe defects in cranial tendon differentiation, muscle and cartilage dysmorphogenesis and paralysis, and lethality by 2-5 wk, which indicates an essential function of scleraxis for craniofacial development. At juvenile and adult stages, ribs in scxa mutants fail to mineralize and/or are small and heavily fractured. Scxa mutants also have smaller muscle volume, abnormal swim movement, and defects in bone growth and composition. Scleraxis function is therefore essential for normal craniofacial form and function and vital for fish development.-Kague, E., Hughes, S. M., Lawrence, E. A., Cross, S., Martin-Silverstone, E., Hammond, C. L., Hinits, Y. Scleraxis genes are required for normal musculoskeletal development and for rib growth and mineralization in zebrafish.
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Affiliation(s)
- Erika Kague
- Department of Physiology, Pharmacology, and Neuroscience, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Simon M. Hughes
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom
| | - Elizabeth A. Lawrence
- Department of Physiology, Pharmacology, and Neuroscience, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Stephen Cross
- Department of Physiology, Pharmacology, and Neuroscience, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Elizabeth Martin-Silverstone
- Department of Physiology, Pharmacology, and Neuroscience, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Chrissy L. Hammond
- Department of Physiology, Pharmacology, and Neuroscience, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Yaniv Hinits
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom
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Levillain A, Rolfe R, Huang Y, Iatridis J, Nowlan N. Short-term foetal immobility temporally and progressively affects chick spinal curvature and anatomy and rib development. Eur Cell Mater 2019; 37:23-41. [PMID: 30644077 PMCID: PMC6505690 DOI: 10.22203/ecm.v037a03] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Congenital spine deformities may be influenced by movements in utero, but the effects of foetal immobility on spine and rib development remain unclear. The purpose of the present study was to determine (1) critical time-periods when rigid paralysis caused the most severe disruption in spine and rib development and (2) how the effects of an early, short-term immobilisation were propagated to the different features of spine and rib development. Chick embryos were immobilised once per single embryonic day (E) between E3 and E6 and harvested at E9. To assess the ontogenetic effects following single-day immobilisation, other embryos were immobilised at E4 and harvested daily between E5 and E9. Spinal curvature, vertebral shape and segmentation and rib development were analysed by optical projection tomography and histology. The results demonstrated that periods critical for movement varied for different aspects of spine and rib development. Single-day immobilisation at E3 or E4 resulted in the most pronounced spinal curvature abnormalities, multiple wedged vertebrae and segmentation defects, while single-day immobilisation at E5 led to the most severe rib abnormalities. Assessment of ontogenetic effects following single-day immobilisation at E4 revealed that vertebral segmentation defects were subsequent to earlier vertebral body shape and spinal curvature abnormalities, while rib formation (although delayed) was independent from thoracic vertebral shape or curvature changes. A day-long immobilisation in chicks severely affected spine and rib development, highlighting the importance of abnormal foetal movements at specific time-points and motivating targeted prenatal monitoring for early diagnosis of congenital scoliosis.
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Affiliation(s)
- A. Levillain
- Department of Bioengineering, Imperial College London, London, UK
| | - R.A. Rolfe
- Department of Bioengineering, Imperial College London, London, UK,Department of Zoology, Trinity College Dublin, Dublin, Ireland
| | - Y. Huang
- Department of Bioengineering, Imperial College London, London, UK
| | - J.C. Iatridis
- Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - N.C. Nowlan
- Department of Bioengineering, Imperial College London, London, UK,Address for correspondence: Niamh C. Nowlan, Department of Bioengineering, Imperial College London, London SW72AZ, UK. Telephone number: +44 2075945189
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13
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DeSesso JM, Scialli AR. Bone development in laboratory mammals used in developmental toxicity studies. Birth Defects Res 2018; 110:1157-1187. [PMID: 29921029 DOI: 10.1002/bdr2.1350] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/19/2018] [Accepted: 04/25/2018] [Indexed: 01/12/2023]
Abstract
Evaluation of the skeleton in laboratory animals is a standard component of developmental toxicology testing. Standard methods of performing the evaluation have been established, and modification of the evaluation using imaging technologies is under development. The embryology of the rodent, rabbit, and primate skeleton has been characterized in detail and summarized herein. The rich literature on variations and malformations in skeletal development that can occur in the offspring of normal animals and animals exposed to test articles in toxicology studies is reviewed. These perturbations of skeletal development include ossification delays, alterations in number, shape, and size of ossification centers, and alterations in numbers of ribs and vertebrae. Because the skeleton is undergoing developmental changes at the time fetuses are evaluated in most study designs, transient delays in development can produce apparent findings of abnormal skeletal structure. The determination of whether a finding represents a permanent change in embryo development with adverse consequences for the organism is important in study interpretation. Knowledge of embryological processes and schedules can assist in interpretation of skeletal findings.
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14
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Böhmer C, Amson E, Arnold P, van Heteren AH, Nyakatura JA. Homeotic transformations reflect departure from the mammalian 'rule of seven' cervical vertebrae in sloths: inferences on the Hox code and morphological modularity of the mammalian neck. BMC Evol Biol 2018; 18:84. [PMID: 29879896 PMCID: PMC5992679 DOI: 10.1186/s12862-018-1202-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 05/23/2018] [Indexed: 11/10/2022] Open
Abstract
Background Sloths are one of only two exceptions to the mammalian ‘rule of seven’ vertebrae in the neck. As a striking case of breaking the evolutionary constraint, the explanation for the exceptional number of cervical vertebrae in sloths is still under debate. Two diverging hypotheses, both ultimately linked to the low metabolic rate of sloths, have been proposed: hypothesis 1 involves morphological transformation of vertebrae due to changes in the Hox gene expression pattern and hypothesis 2 assumes that the Hox gene expression pattern is not altered and the identity of the vertebrae is not changed. Direct evidence supporting either hypothesis would involve knowledge of the vertebral Hox code in sloths, but the realization of such studies is extremely limited. Here, on the basis of the previously established correlation between anterior Hox gene expression and the quantifiable vertebral shape, we present the morphological regionalization of the neck in three different species of sloths with aberrant cervical count providing indirect insight into the vertebral Hox code. Results Shape differences within the cervical vertebral column suggest a mouse-like Hox code in the neck of sloths. We infer an anterior shift of HoxC-6 expression in association with the first thoracic vertebra in short-necked sloths with decreased cervical count, and a posterior shift of HoxC-5 and HoxC-6 expression in long-necked sloths with increased cervical count. Conclusion Although only future developmental analyses in non-model organisms, such as sloths, will yield direct evidence for the evolutionary mechanism responsible for the aberrant number of cervical vertebrae, our observations lend support to hypothesis 1 indicating that the number of modules is retained but their boundaries are displaced. Our approach based on quantified morphological differences also provides a reliable basis for further research including fossil taxa such as extinct ‘ground sloths’ in order to trace the pattern and the underlying genetic mechanisms in the evolution of the vertebral column in mammals. Electronic supplementary material The online version of this article (10.1186/s12862-018-1202-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christine Böhmer
- UMR 7179 CNRS/MNHN, Muséum National d'Histoire Naturelle, 57 rue Cuvier, CP-55, Paris, France.
| | - Eli Amson
- AG Morphologie und Formengeschichte, Institut für Biologie, Humboldt Universität zu Berlin, Philippstraße 13, 10115, Berlin, Germany.,Image Knowledge Gestaltung: An Interdisciplinary Laboratory, Humboldt University, Philippstraße 13, 10115, Berlin, Germany.,Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, 10115, Berlin, Germany
| | - Patrick Arnold
- Institut für Zoologie und Evolutionsforschung mit Phyletischem Museum, Ernst-Haeckel-Haus und Biologiedidaktik, Friedrich-Schiller-Universität Jena, Erbertstraße 1, 07743, Jena, Germany.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany
| | - Anneke H van Heteren
- Sektion Mammalogie, SNSB - Zoologische Staatssammlung, Münchhausenstraße 21, 81247, München, Germany.,GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333, Munich, Germany.,Department Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152, Planegg-Martinsried, Germany
| | - John A Nyakatura
- AG Morphologie und Formengeschichte, Institut für Biologie, Humboldt Universität zu Berlin, Philippstraße 13, 10115, Berlin, Germany.,Image Knowledge Gestaltung: An Interdisciplinary Laboratory, Humboldt University, Philippstraße 13, 10115, Berlin, Germany
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15
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Brocklehurst RJ, Moritz S, Codd J, Sellers WI, Brainerd EL. Rib kinematics during lung ventilation in the American alligator ( Alligator mississippiensis): an XROMM analysis. ACTA ACUST UNITED AC 2018; 220:3181-3190. [PMID: 28855323 PMCID: PMC5612015 DOI: 10.1242/jeb.156166] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/15/2017] [Indexed: 11/20/2022]
Abstract
The current hypothesis regarding the mechanics of breathing in crocodylians is that the double-headed ribs, with both a capitulum and tuberculum, rotate about a constrained axis passing through the two articulations; moreover, this axis shifts in the caudal thoracic ribs, as the vertebral parapophysis moves from the centrum to the transverse process. Additionally, the ventral ribcage in crocodylians is thought to possess additional degrees of freedom through mobile intermediate ribs. In this study, X-ray reconstruction of moving morphology (XROMM) was used to quantify rib rotation during breathing in American alligators. Whilst costovertebral joint anatomy predicted overall patterns of motion across the ribcage (decreased bucket handle motion and increased calliper motion), there were significant deviations: anatomical axes overestimated pump handle motion and, generally, ribs in vivo rotate about all three body axes more equally than predicted. The intermediate ribs are mobile, with a high degree of rotation measured about the dorsal intracostal joints, especially in the more caudal ribs. Motion of the sternal ribs became increasingly complex caudally, owing to a combination of the movements of the vertebral and intermediate segments. As the crocodylian ribcage is sometimes used as a model for the ancestral archosaur, these results have important implications for how rib motion is reconstructed in fossil taxa, and illustrate the difficulties in reconstructing rib movement based on osteology alone. Summary: Using XROMM to test how well joint anatomy predicts rib motion during breathing in crocodylians, our best living model for the earliest archosaurs.
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Affiliation(s)
- Robert J Brocklehurst
- School of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PT, UK
| | - Sabine Moritz
- Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
| | - Jonathan Codd
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - William I Sellers
- School of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PT, UK
| | - Elizabeth L Brainerd
- Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
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16
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Gomes de Souza L. Comments on the Serial Homology and Homologues of Vertebral Lateral Projections in Crocodylia (Eusuchia). Anat Rec (Hoboken) 2018. [PMID: 29516683 DOI: 10.1002/ar.23802] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The literature on crocodylian anatomy presents the transverse process in an ambiguous meaning, which could represent all lateral expansions derived from the neural arch, including vertebrae from cervical to caudal series, or in a more restrictive meaning, being applied only to lumbar vertebrae. The lateral expansion of sacral and caudal vertebrae usually referred to as the transverse process has been discovered to be fused ribs, bringing more ambiguity to this term. Therefore, with the lack of a definition for transverse process and other associated terms, the present work aims to propose a nomenclatural standardization, as well as definitions and biological meaning, for vertebral rib related structures. Vertebra obtained from museum collections from a total of 87 specimens of 22 species of all extant Crocodylia genera were studied. All vertebrae, except cervical and first three dorsal, exhibit transverse processes. The transverse process is more developed in dorsal and lumbar vertebrae than in sacral and caudal vertebrae in which it is suppressed by the fused ribs. The serial homology hypotheses here proposed can also be aplied to other Crurotarsi and saurischian dinosaurs specimens. This standardization clarifies the understand of the serial homology among those homotypes, and reduces the ambiguity and misleadings in future work comparisons. Anat Rec, 301:1203-1215, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Lucy Gomes de Souza
- Laboratório de Sistemática e Tafonomia de Vertebrados Fósseis, Setor de Paleovertebrados, Departamento de Geologia e Paleontologia, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/no, São Cristóvão, RJ 20940-040, Brazil Rio de Janeiro
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17
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Saberi M, Pu Q, Valasek P, Norizadeh-Abbariki T, Patel K, Huang R. The hypaxial origin of the epaxially located rhomboid muscles. Ann Anat 2017; 214:15-20. [PMID: 28655569 DOI: 10.1016/j.aanat.2017.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/22/2017] [Accepted: 05/29/2017] [Indexed: 10/19/2022]
Abstract
In vertebrates, skeletal muscles of the body are made up of epaxial and hypaxial muscles based on their innervation and relative position to the vertebral column. The epaxial muscles are innervated by the dorsal branches of the spinal nerves and comprise the intrinsic (deep) back muscles, while the hypaxial muscles are innervated by the ventral branches of the spinal nerves including the plexus and consist of a heterogeneous group of intercostal, abdominal, and limb as well as girdle muscles. The canonical view holds that the epaxial muscles are derived from the medial halves of the somites, whereas the hypaxial muscles are all derived from the lateral somitic halves. The rhomboid muscles are situated dorsal to the vertebral column and therefore in the domain typically occupied by epaxial muscles. However, they are innervated by a ventral branch of the brachial plexus called the N. dorsalis scapulae. Due to the apparent inappropriate position of the muscle in relation to its innervation we investigated its origin to help clarify this issue. To study the embryonic origin of the rhomboid muscles, we followed derivatives of the medial and lateral somite halves using quail-chick chimeras. Our results showed that the rhomboid muscles are made up of cells derived mainly from the lateral portion of the somite. Therefore the rhomboid muscles which lie within the epaxial domain of the body, originate from the hypaxial domain of the somites. However their connective tissue is derived from both medial and lateral somites.
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Affiliation(s)
- Minu Saberi
- Institute of Anatomy, Department of Neuroanatomy, Medical Faculty Bonn, Rheinische Friedrich-Wilhelms-University of Bonn, Germany; Department of Operative Dentistry and Periodontology, Medical Center-University of Freiburg, Faculty of Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Qin Pu
- Institute of Anatomy, Department of Neuroanatomy, Medical Faculty Bonn, Rheinische Friedrich-Wilhelms-University of Bonn, Germany; Institute of Anatomy, Department of Anatomy and Molecular Embryology, Ruhr-University Bochum, Germany
| | - Petr Valasek
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Tannaz Norizadeh-Abbariki
- Institute of Anatomy, Department of Neuroanatomy, Medical Faculty Bonn, Rheinische Friedrich-Wilhelms-University of Bonn, Germany
| | - Ketan Patel
- School of Biological Sciences, University of Reading, UK
| | - Ruijin Huang
- Institute of Anatomy, Department of Neuroanatomy, Medical Faculty Bonn, Rheinische Friedrich-Wilhelms-University of Bonn, Germany; Institute of Anatomy and Cell Biology, Department of Anatomy and Molecular Embryology, University of Freiburg, Germany.
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18
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Kabakus IM, Atceken Z, Ariyurek OM. Expansion of the Rib Head: A Novel Computed Tomographic Feature of Supernumerary Intrathoracic Ribs. Eurasian J Med 2017; 49:64-65. [PMID: 28416937 DOI: 10.5152/eurasianjmed.2017.17004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Intrathoracic ribs are very rare congenital anomalies. Approximately 50 cases have been reported in the literature till date. They are usually present on the right side, between the third and eighth ribs without sex predominance. They may originate from a vertebral body or the proximal or distal part of a rib. In most cases, they are asymptomatic, but they may be associated with developmental abnormalities of ribs and vertebrae. The diagnosis is important to prevent further investigation or intervention. Here we present two rare cases with supernumerary intrathoracic rib and describe a novel sign, namely expansion of the rib head. To the best of our knowledge, this is the shortest supernumerary intrathoracic rib, reported in the literature, on the left side originating from the head of the second rib, which could have been misdiagnosed as osteochondroma due to its atypical features.
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Affiliation(s)
- Ismail Mikdat Kabakus
- Department of Radiology, Erzurum Regional Training and Research Hospital, Erzurum, Turkey
| | - Zeynep Atceken
- Department of Radiology, Koç University School of Medicine, İstanbul, Turkey
| | - Orhan Macit Ariyurek
- Department of Radiology, Hacettepe University School of Medicine, Ankara, Turkey
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19
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Tawan G, García-Martínez D, Eyre J, Bastir M, Berger L, Schmid P, Nalla S, Williams SA. A hominin first rib discovered at the Sterkfontein Caves, South Africa. S AFR J SCI 2016. [DOI: 10.17159/sajs.2016/20150278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Abstract First ribs – the first or most superior ribs in the thorax – are rare in the hominin fossil record, and when found, have the potential to provide information regarding the upper thorax shape of extinct hominins. Here, we describe a partial first rib from Member 4 of the Sterkfontein Caves, South Africa. The rib shaft is broken away, so only the head and neck are preserved. The rib is small, falling closest to small-bodied Australopithecus first ribs (AL 288-1 and MH1). Given that it was recovered near the StW 318 femur excavation, which also represents a small individual, we suggest that the two may be associated. Three-dimensional geometric morphometric analyses were used to quantify the rib fragment morphology and compare it to extant hominoid and other fossil hominin ribs. While only the proximal end is preserved, our analyses show that South African Australopithecus share derived features of the proximal first rib more closely resembling A. afarensis and later hominins than great apes.
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20
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Bastir M, García-Martínez D, Estalrrich A, García-Tabernero A, Huguet R, Ríos L, Barash A, Recheis W, de la Rasilla M, Rosas A. The relevance of the first ribs of the El Sidrón site (Asturias, Spain) for the understanding of the Neandertal thorax. J Hum Evol 2015; 80:64-73. [PMID: 25563407 DOI: 10.1016/j.jhevol.2014.10.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 10/17/2014] [Accepted: 10/17/2014] [Indexed: 10/24/2022]
Abstract
Reconstructing the morphology of the Neanderthal rib cage not only provides information about the general evolution of human body shape but also aids understanding of functional anatomy and energetics. Despite this paleobiological importance there is still debate about the nature and extent of variations in the size and shape of the Neandertal thorax. The El Sidrón Neandertals can be used to contribute to this debate, providing new costal remains ranging from fully preserved and undistorted ribs to highly fragmented elements. Six first ribs are particularly well preserved and offer the opportunity to analyze thorax morphology in Neandertals. The aims of this paper are to present this new material, to compare the ontogenetic trajectories of the first ribs between Neandertals and modern humans, and, using geometric morphometrics, to test the hypothesis of morphological integration between the first rib and overall thorax morphology. The first ribs of the El Sidrón adult Neandertals are smaller in centroid size and tend to be less curved when compared with those of modern humans, but are similar to Kebara 2. Our results further show that the straightening of the first ribs is significantly correlated with a straightening of the ribs of the upper thorax (R = 0.66; p < 0.0001) in modern humans, suggesting modularity in the upper and lower thorax units as reported in other hominins. It also supports the hypothesis that the upper thorax of Neandertals differs in shape from modern humans with more anteriorly projecting upper ribs during inspiration. These differences could have biomechanical consequences and account for stronger muscle attachments in Neandertals. Different upper thorax shape would also imply a different spatial arrangement of the shoulder girdle and articulation with the humerus (torsion) and its connection to the upper thorax. Future research should address these inferences in the context of Neandertal overall body morphology.
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Affiliation(s)
- Markus Bastir
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain.
| | - Daniel García-Martínez
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain
| | - Almudena Estalrrich
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain
| | - Antonio García-Tabernero
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain
| | - Rosa Huguet
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain; Institut Català de Paleoecologia Humana i Evolució Social (IPHES), C/ Marcel.lí Domingo s/n e Campus Sescelades URV (Edifici W3), 43007 Tarragona, Spain; Àrea de Prehistòria, Universitat Rovira i Virgili (URV), Avinguda de Catalunya 35, 43002 Tarragona, Spain; Unidad asociada al CSIC, Departamento de Paleobiología, Museo Nacional de Ciencias Naturales, Calle José Gutierrez Abascal, 2. 28006 Madrid, Spain
| | - Luis Ríos
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain; Sociedad de Ciencias Aranzadi-Aranzadi Zientzia Elkartea, Alto de Zorroaga Bidea, 11, 20014, Donostia, Gipuzkoa, Spain
| | - Alon Barash
- Faculty of Medicine in the Galilee, Bar Ilan University, Henrietta Szold, 8, P.O.B 1589, 1311502, Zefat, Israel
| | - Wolfgang Recheis
- Department of Radiology, Medical University Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
| | - Marco de la Rasilla
- Department of History, University of Oviedo, Campus del Milán, C/ Teniente Alfonso Martínez s/n, 33011, Oviedo, Spain
| | - Antonio Rosas
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (CSIC), J. G. Abascal 2, 28006, Madrid, Spain
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21
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Bastir M, Higuero A, Ríos L, García Martínez D. Three-dimensional analysis of sexual dimorphism in human thoracic vertebrae: implications for the respiratory system and spine morphology. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 155:513-21. [PMID: 25176047 DOI: 10.1002/ajpa.22604] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 08/15/2014] [Indexed: 11/09/2022]
Abstract
Sexual dimorphism is important for intraspecific variation and well studied in the human skeleton. In the thoracic part of the spine sexual dimorphism is expected for differences in the respiratory system related to body mass, lung capacity, and energetics, and in the reproductive system for adaptations to pregnancy (lower spine lordosis, posture). However, little is known about sexual dimorphism in this anatomical region. We use three-dimensional (3D)-geometric morphometrics to test hypotheses on sexual dimorphism in the first 10 thoracic vertebrae (T1-T10). Forty-six 3D-landmarks were measured on vertebrae of 24 adult females and males of known age and sex. Results confirm that male vertebrae are consistently larger than female ones. Males show more dorsally oriented transverse processes and relatively larger vertebral bodies in upper and lower thoracic vertebrae. Sexual dimorphism in lower thoracic vertebrae affects the orientation of the spinous processes, which is more horizontal in females but more caudal in males. Such regional pattering of sexual dimorphism emerges also from principal component analyses reflecting a complex interaction between the effects of sex and serial position on shape variation. Greater dorsal orientation of male transverse processes reorients the ribs and could lead to greater radial thorax diameters. This fits with greater male respiratory capacities, but may indicate also greater invagination of the male spine within the thorax. Horizontal orientation of the spinous processes in females could allow for a greater thoraco-lumbar lordosis during pregnancy, but more comparative research is necessary to test these hypotheses.
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Affiliation(s)
- Markus Bastir
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales, CSIC. J. G. Abascal 2, 28006, Madrid, Spain
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22
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Buchholtz EA. Crossing the frontier: a hypothesis for the origins of meristic constraint in mammalian axial patterning. ZOOLOGY 2013; 117:64-9. [PMID: 24290362 DOI: 10.1016/j.zool.2013.09.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 09/28/2013] [Indexed: 11/17/2022]
Abstract
Serially homologous systems with high internal differentiation frequently exhibit meristic constraints, although the developmental basis for constraint is unknown. Constraints in the counts of the cervical and lumbosacral vertebral series are unique to mammals, and appeared in the Triassic, early in their history. Concurrent adaptive modifications of the mammalian respiratory and locomotor systems involved a novel source of cells for muscularization of the diaphragm from cervical somites, and the loss of ribs from lumbar vertebrae. Each of these innovations increased the modularity of the somitic mesoderm, and altered somitic and lateral plate mesodermal interactions across the lateral somitic frontier. These developmental innovations are hypothesized here to constrain the anteroposterior transposition of the limbs along the column, and thus also cervical and thoracolumbar count. Meristic constraints are therefore regarded here as the nonadaptive, secondary consequences of adaptive respiratory and locomotor traits.
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Affiliation(s)
- Emily A Buchholtz
- Department of Biological Sciences, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA.
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23
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Nagashima H, Hirasawa T, Sugahara F, Takechi M, Usuda R, Sato N, Kuratani S. Origin of the unique morphology of the shoulder girdle in turtles. J Anat 2013; 223:547-56. [PMID: 24117338 DOI: 10.1111/joa.12116] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2013] [Indexed: 11/29/2022] Open
Abstract
The shoulder girdle of turtles has a triradiate morphology. Although its dorsal process represents the scapular blade, the skeletal identities of the two ventral processes remain uncertain. To elucidate the question, developmental patterns of the girdles were compared between Chinese soft-shelled turtles, chickens, and mice. Despite the morphological diversity of adults, the initial primordia of the shoulder girdles showed similar morphological patterns. The ventral two processes developed from the anlagen comparable to those of the acromion and the coracoid in other amniotes. The developmental pattern of the acromion is very similar among embryos, whereas that of the coracoid in mammals differs from that in non-mammals, implying that coracoids are not homologous between non-mammals and mammals. Therefore, amniotes have retained the ancestral pattern of the girdle anlage, and the shoulder girdle of turtles has been achieved through a transformation of the pattern in the late ontogenic period.
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Affiliation(s)
- Hiroshi Nagashima
- Laboratory for Evolutionary Morphology, RIKEN Center for Developmental Biology (CDB), Hyogo, Japan; Division of Gross Anatomy and Morphogenesis, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Buckley D, Molnár V, Németh G, Petneházy O, Vörös J. 'Monster… -omics': on segmentation, re-segmentation, and vertebrae formation in amphibians and other vertebrates. Front Zool 2013; 10:17. [PMID: 23577917 PMCID: PMC3637066 DOI: 10.1186/1742-9994-10-17] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 04/02/2013] [Indexed: 11/10/2022] Open
Abstract
Background The axial skeleton is one of the defining evolutionary landmarks of vertebrates. How this structure develops and how it has evolved in the different vertebrate lineages is, however, a matter of debate. Vertebrae and vertebral structures are derived from the embryonic somites, although the mechanisms of development are different between lineages. Discussion Using the anecdotal description of a teratological newt (Triturus dobrogicus) with an unusual malformation in its axial skeleton, we review, compare, and discuss the development of vertebral structures and, in particular, the development of centra from somitic cellular domains in different vertebrate groups. Vertebrae development through re-segmentation of the somitic sclerotomal cells is considered the general mechanism among vertebrates, which has been generalized from studies in amniotic model organisms. The prevalence of this mechanism among anamniotes is, however, controversial. We propose alternative developmental mechanisms for vertebrae formation that should be experimentally tested. Summary Research in model organisms, especially amniotes, is laying the foundations for a thorough understanding of the mechanisms of development of the axial skeleton in vertebrates, foundations that should expand the extent of future comparative studies. Although immersed in the ‘-omics’ era, we emphasize the need for an integrative and organismal approach in evolutionary developmental biology for a better understanding of the causal role of development in the evolution of morphological diversity in nature.
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Affiliation(s)
- David Buckley
- Dpt, of Zoology Hungarian Natural History Museum, Baross u, 13, Budapest, 1088, Hungary.
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25
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Basarslan F, Bayarogulları H, Tutanc M, Arica V, Yilmaz C, Davran R. Intrathoracic rib associated with pulmonary collapse in a pediatric patient. IRANIAN JOURNAL OF RADIOLOGY : A QUARTERLY JOURNAL PUBLISHED BY THE IRANIAN RADIOLOGICAL SOCIETY 2013; 9:220-2. [PMID: 23408171 PMCID: PMC3569556 DOI: 10.5812/iranjradiol.8608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 06/30/2012] [Accepted: 07/16/2012] [Indexed: 11/23/2022]
Abstract
The ribs are essential structures of the osseous thorax that provide certain significant information and aid interpretation of radiologic images in daily routine practice. Intrathoracic rib is a rare congenital anomaly that is usually discovered incidentally, but may cause in vain interventions in case of being unaware. We herein report an intrathoracic rib in a girl whose chest X-ray was strange enough to obtain a spiral computed tomography (CT) scanning for a definitive diagnosis afterwards.
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Affiliation(s)
- Fatmagul Basarslan
- Department of Pediatrics, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
- Corresponding author: Fatmagul Basarslan, Faculty of Medicine, Mustafa Kemal University, Department of Pediatrics, Hatay, Turkey. Tel.: +90-3262291000/2827, Fax: +90-326245505, E-mail:
| | - Hanifi Bayarogulları
- Department of Radiology, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
| | - Murat Tutanc
- Department of Pediatrics, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
| | - Vefik Arica
- Department of Pediatrics, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
| | - Cahide Yilmaz
- Department of Pediatrics, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
| | - Ramazan Davran
- Department of Radiology, Research Hospital, Faculty of Medicine, Mustafa Kemal University, Hatay, Turkey
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26
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Prados J, Archilla F, Melguizo C, Aranega A. Four accessory (supernumerary) intrathoracic ribs: a case report. Surg Radiol Anat 2013; 35:627-9. [PMID: 23385737 DOI: 10.1007/s00276-013-1079-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 01/24/2013] [Indexed: 11/25/2022]
Abstract
Accessory (supernumerary) intrathoracic ribs are a very rare congenital disorder. Here, we present the first case of multiple supernumerary intrathoracic ribs in an adult, which are present consecutively between ribs 1 and 4 and without articulation with the vertebrae. Despite this, anatomical variation is usually silent and accidentally discovered; its knowledge can prevent confusion with other structures during imaging diagnostic techniques of thoracic pathologies.
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Affiliation(s)
- Jose Prados
- Department of Anatomy and Embryology, School of Medicine, University of Granada, 18071, Granada, Spain
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27
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Origin of the Turtle Body Plan: The Folding Theory to Illustrate Turtle-Specific Developmental Repatterning. VERTEBRATE PALEOBIOLOGY AND PALEOANTHROPOLOGY 2013. [DOI: 10.1007/978-94-007-4309-0_4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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28
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Sato Y. Dorsal aorta formation: separate origins, lateral-to-medial migration, and remodeling. Dev Growth Differ 2012; 55:113-29. [PMID: 23294360 DOI: 10.1111/dgd.12010] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Revised: 09/19/2012] [Accepted: 09/19/2012] [Indexed: 01/12/2023]
Abstract
Blood vessel formation is a highly dynamic tissue-remodeling event that can be observed from early development in vertebrate embryos. Dorsal aortae, the first functional intra-embryonic blood vessels, arise as two separate bilateral vessels in the trunk and undergo lateral-to-medial translocation, eventually fusing into a single large vessel at the midline. After this dramatic remodeling, the dorsal aorta generates hematopoietic stem cells. The dorsal aorta is a good model to use to increase our understanding of the mechanisms controlling the establishment and remodeling of larger blood vessels in vivo. Because of the easy accessibility to the developing circulatory system, quail and chick embryos have been widely used for studies on blood vessel formation. In particular, the mapping of endothelial cell origins has been performed using quail-chick chimera analysis, revealing endothelial, vascular smooth muscle, and hematopoietic cell progenitors of the dorsal aorta. The avian embryo model also allows conditional gene activation/inactivation and direct observation of cell behaviors during dorsal aorta formation. This allows a better understanding of the molecular mechanisms underlying specific morphogenetic events during dynamic dorsal aorta formation from a cell behavior perspective.
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Affiliation(s)
- Yuki Sato
- Priority Organization for Innovation and Excellence, Kumamoto University, 2-2-1 Honjo, Kumamoto, Japan.
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29
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Nagashima H, Kuraku S, Uchida K, Kawashima-Ohya Y, Narita Y, Kuratani S. Body plan of turtles: an anatomical, developmental and evolutionary perspective. Anat Sci Int 2011; 87:1-13. [DOI: 10.1007/s12565-011-0121-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 10/24/2011] [Indexed: 10/15/2022]
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30
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Mansfield JH, Abzhanov A. Hox expression in the American alligator and evolution of archosaurian axial patterning. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2011; 314:629-44. [PMID: 20623505 DOI: 10.1002/jez.b.21364] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The avian body plan has undergone many modifications, most associated with adaptation to flight and bipedal walking. Some of these modifications may be owing to avian-specific changes in the embryonic Hox expression code. Here, we have examined Hox expression in alligator, the closest living relative of birds, and an archosaur with a more conservative body plan. Two differences in Hox expression between chick, alligator, and other tetrapods correlate with aspects of alligator or bird-specific skeletal morphology. First, absence of a thoracic subdomain of Hoxc-8 expression in alligator correlates with morphological adaptations in crocodilian thoracic segments. Second, Hoxa-5, a gene required to pattern the cervical-thoracic transition, shows unique patterns of expression in chick, alligator, and mouse, correlating with species-specific morphological patterning of this region. Given that cervical vertebral morphologies evolved independently in the bird and mammalian lineages, the underlying developmental mechanisms, including refinement of Hox expression domains, may be distinct.
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Affiliation(s)
- Jennifer H Mansfield
- Department of Biological Sciences, Barnard College, Columbia University, 3009 Broadway, New York, NY 10027, USA.
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31
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Nagasawa H, Yamamoto Y, Kohno Y. Cerebro-costo-mandibular syndrome: prognosis and proposal for classification. Congenit Anom (Kyoto) 2010; 50:171-4. [PMID: 20507350 DOI: 10.1111/j.1741-4520.2010.00281.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cerebro-costo-mandibular syndrome (CCMS) is a very rare syndrome characterized by micrognathia and posterior rib gap, with a poor prognosis. To date, only 75 cases have been reported worldwide. The overall survival rate for patients with this disorder has not been reported, and a classification of the patients on the basis of the prognosis is not yet available. The present study analyzed the figures and prognoses of past patients and documented a new case of CCMS. Formerly published case reports and personal communications were used to reveal the prognosis and classification of CCMS. The occurrence ratios of rib gap defects and of missing ribs were examined. Patients were divided into the following three groups according to their life span: lethal type, where the patients died before 1 month; severe type, where the patients lived for 1-12 months; and mild type, where they survived for more than 1 year. A comparison was made of the number of rib gaps, missing ribs, and the rib gap ratio (defined as the number of rib gaps divided by the number of all existing ribs) among these three groups. A significant difference in the number of rib defects between the lethal type and other types was noted. Short life span of severe type patients, compared to mild type, was attributed to their subjection to severe respiratory infection. CCMS can be classified into three categories--lethal, severe, and mild--according to the severity of the symptoms and prognosis.
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Affiliation(s)
- Hiroyuki Nagasawa
- Department of Neonatology, Gifu Prefectural General Medical Center, 4-6-1 Noisshiki, Gifu, Japan.
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32
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Mallo M, Wellik DM, Deschamps J. Hox genes and regional patterning of the vertebrate body plan. Dev Biol 2010; 344:7-15. [PMID: 20435029 DOI: 10.1016/j.ydbio.2010.04.024] [Citation(s) in RCA: 348] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 04/09/2010] [Accepted: 04/22/2010] [Indexed: 12/18/2022]
Abstract
Several decades have passed since the discovery of Hox genes in the fruit fly Drosophila melanogaster. Their unique ability to regulate morphologies along the anteroposterior (AP) axis (Lewis, 1978) earned them well-deserved attention as important regulators of embryonic development. Phenotypes due to loss- and gain-of-function mutations in mouse Hox genes have revealed that the spatio-temporally controlled expression of these genes is critical for the correct morphogenesis of embryonic axial structures. Here, we review recent novel insight into the modalities of Hox protein function in imparting specific identity to anatomical regions of the vertebral column, and in controlling the emergence of these tissues concomitantly with providing them with axial identity. The control of these functions must have been intimately linked to the shaping of the body plan during evolution.
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Affiliation(s)
- Moises Mallo
- Instituto Gulbenkian de Ciência, Oeiras, Portugal.
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33
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Buchholtz EA, Stepien CC. Anatomical transformation in mammals: developmental origin of aberrant cervical anatomy in tree sloths. Evol Dev 2009; 11:69-79. [PMID: 19196334 DOI: 10.1111/j.1525-142x.2008.00303.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mammalian cervical count has been fixed at seven for more than 200 million years. The rare exceptions to this evolutionary constraint have intrigued anatomists since the time of Cuvier, but the developmental processes that generate them are unknown. Here we evaluate competing hypotheses for the evolutionary origin of cervical variants in Bradypus and Choloepus, tree sloths that have broken the seven cervical vertebrae barrier independently and in opposite directions. Transitional and mediolaterally disjunct anatomy characterizes the cervicothoracic vertebral boundary in each genus, although polarities are reversed. The thoracolumbar, lumbosacral, and sacrocaudal boundaries are also disrupted, and are more extreme in individuals with more extreme cervical counts. Hypotheses of homologous, homeotic, meristic, or associational transformations of traditional vertebral column anatomy are not supported by these data. We identify global homeotic repatterning of abaxial relative to primaxial mesodermal derivatives as the origin of the anomalous cervical counts of tree sloths. This interpretation emphasizes the strong resistance of the "rule of seven" to evolutionary change, as morphological stasis has been maintained primaxially coincident with the generation of a functionally longer (Bradypus) or shorter (Choloepus) neck.
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Affiliation(s)
- Emily A Buchholtz
- Department of Biological Sciences, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA.
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34
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Miclea RL, Karperien M, Bosch CA, van der Horst G, van der Valk MA, Kobayashi T, Kronenberg HM, Rawadi G, Akçakaya P, Löwik CW, Fodde R, Wit JM, Robanus-Maandag EC. Adenomatous polyposis coli-mediated control of beta-catenin is essential for both chondrogenic and osteogenic differentiation of skeletal precursors. BMC DEVELOPMENTAL BIOLOGY 2009; 9:26. [PMID: 19356224 PMCID: PMC2678105 DOI: 10.1186/1471-213x-9-26] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Accepted: 04/08/2009] [Indexed: 12/31/2022]
Abstract
Background During skeletogenesis, protein levels of β-catenin in the canonical Wnt signaling pathway determine lineage commitment of skeletal precursor cells to osteoblasts and chondrocytes. Adenomatous polyposis coli (Apc) is a key controller of β-catenin turnover by down-regulating intracellular levels of β-catenin. Results To investigate whether Apc is involved in lineage commitment of skeletal precursor cells, we generated conditional knockout mice lacking functional Apc in Col2a1-expressing cells. In contrast to other models in which an oncogenic variant of β-catenin was used, our approach resulted in the accumulation of wild type β-catenin protein due to functional loss of Apc. Conditional homozygous Apc mutant mice died perinatally showing greatly impaired skeletogenesis. All endochondral bones were misshaped and lacked structural integrity. Lack of functional Apc resulted in a pleiotropic skeletal cell phenotype. The majority of the precursor cells lacking Apc failed to differentiate into chondrocytes or osteoblasts. However, skeletal precursor cells in the proximal ribs were able to escape the noxious effect of functional loss of Apc resulting in formation of highly active osteoblasts. Inactivation of Apc in chondrocytes was associated with dedifferentiation of these cells. Conclusion Our data indicate that a tight Apc-mediated control of β-catenin levels is essential for differentiation of skeletal precursors as well as for the maintenance of a chondrocytic phenotype in a spatio-temporal regulated manner.
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Affiliation(s)
- Razvan L Miclea
- Department of Tissue Regeneration, Institute for Biomedical Technology, University of Twente, Enschede, The Netherlands.
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35
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Third accessory (supernumerary) intrathoracic right rib. Surg Radiol Anat 2009; 31:641-3. [PMID: 19322508 DOI: 10.1007/s00276-009-0496-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Accepted: 03/11/2009] [Indexed: 10/21/2022]
Abstract
Intrathoracic ribs are very rare congenital anomaly. We report a case of a third accessory intrathoracic rib located anterior to the normally developed right third rib in a 37-year-old man. Chest X-ray was not diagnostic. Multidetector computed tomography with 3D reconstructions was required for definitive diagnosis. These anomalies are usually clinically silent and detected incidentally by imaging studies. They should be kept in mind in the differential diagnosis of thoracic pathologies.
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36
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Liem IK, Aoyama H. Body wall morphogenesis: limb-genesis interferes with body wall-genesis via its influence on the abaxial somite derivatives. Mech Dev 2008; 126:198-211. [PMID: 19059337 DOI: 10.1016/j.mod.2008.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 11/03/2008] [Accepted: 11/14/2008] [Indexed: 11/25/2022]
Abstract
The vertebrate body wall is regionalized into thoracic and lumbosacral/abdominal regions that differ in their morphology and developmental origin. The thoracic body wall has ribs and intercostal muscles, which develops from thoracic somites, whereas the abdominal wall has abdominal muscles, which develops from lumbosacral somites without ribs cage. To examine whether limb-genesis interferes with body wall-genesis, and to test the possibility that limb generation leads to the regional differentiation, an ectopic limb was induced in the thoracic region by transplanting prospective limb somatopleural mesoderm of Japanese quail between the ectoderm and somatopleural mesoderm of the chick prospective thoracic region. This ectopic limb generation induced the somitic cells to migrate into the ectopic limb mesenchyme to become its muscles and caused the loss of distal thoracic body wall (sterno-distal rib and distal intercostal muscle), without causing any significant effect on the more proximal region (proximal rib, vertebro-distal rib and proximal intercostal muscle). According to a new primaxial-abaxial classification, the proximal region is classified as primaxial and the distal region, as well as limb, is classified as abaxial. We demonstrated that ectopic limb development interfered with body wall development via its influence on the abaxial somite derivatives. The present study supports the idea that the somitic cells give rise to the primaxial derivatives keeping their own identity and fate, whereas they produce the abaxial derivatives responding to the lateral plate mesoderm.
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Affiliation(s)
- Isabella Kurnia Liem
- Department of Anatomy and Developmental Biology, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
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Abstract
Somites are segments of paraxial mesoderm that give rise to a multitude of tissues in the vertebrate embryo. Many decades of intensive research have provided a wealth of data on the complex molecular interactions leading to the formation of various somitic derivatives. In this review, we focus on the crucial role of the somites in building the body wall and limbs of amniote embryos. We give an overview on the current knowledge on the specification and differentiation of somitic cell lineages leading to the development of the vertebral column, skeletal muscle, connective tissue, meninges, and vessel endothelium, and highlight the importance of the somites in establishing the metameric pattern of the vertebrate body.
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Affiliation(s)
- Bodo Christ
- Institute of Anatomy und Cell Biology, Department of Molecular Embryology, University of Freiburg, Albertstr. 17, 79104 Freiburg, Germany.
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38
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Kamano H, Ishihama T, Ishihama H, Kubota Y, Tanaka T, Satoh K. Bifid intrathoracic rib: a case report and classification of intrathoracic ribs. Intern Med 2006; 45:627-30. [PMID: 16755094 DOI: 10.2169/internalmedicine.45.1502] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Bifid intrathoracic rib is a very rare anomaly of the ribs that is characterized by an osseous prominence of a rib into the thoracic cavity. We report a 21-year-old woman with bifid intrathoracic rib arising from the anterior-lateral portion of a depressed 4th rib, based on findings from chest radiography and computed tomography (CT). This is only the second reported case of this type of intrathoracic rib worldwide. We discuss differential diagnoses for this case and suggest a classification of intrathoracic rib from the perspective of morphology and developmental biology.
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