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"Goel, Sandeep"
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Comprehensive assessment of goat adipose tissue-derived mesenchymal stem cells cultured in different media
Mesenchymal stem cells (MSCs) have demonstrated potential in treating livestock diseases that are unresponsive to conventional therapies. MSCs derived from goats, a valuable model for studying orthopaedic disorders in humans, offer insights into bone formation and regeneration. Adipose tissue-derived MSCs (ADSCs) are easily accessible and have a high capacity for expansion. Although the choice of culture media significantly influences the biological properties of MSCs, the optimal media for goat ADSCs (gADSCs) remains unclear. This study aimed to assess the effects of four commonly used culture media on gADSCs’ culture characteristics, stem cell-specific immunophenotype, and differentiation. Results showed that MEM, DMEM/F12, and DMEM-LG were superior in maintaining cell morphology and culture parameters of gADSCs, such as cell adherence, metabolic activity, colony-forming potential, and population doubling. Conversely, DMEM-HG exhibited poor performance across all evaluated parameters. The gADSCs cultured in DMEM/F12 showed enhanced early proliferation and lower apoptosis. The cell surface marker distribution exhibited superior characteristics in gADSCs cultured in MEM and DMEM/F12. In contrast, the distribution was inferior in gADSCs cultured in DMEM-LG. DMEM/F12 and DMEM-LG culture media demonstrated a significantly higher potential for chondrogenic differentiation and DMEM-LG for osteogenic differentiation. In conclusion, DMEM/F12 is a suitable culture medium for propagating gADSCs as it effectively maintains cell morphology, growth parameters, proliferation and lower apoptosis while exhibiting desirable expression patterns of MSC-specific markers. These findings contribute to optimising culture conditions for gADSCs, enhancing their potential applications in disease treatment and regenerative medicine.
Journal Article
Dysregulation of angiogenesis-specific signalling in adult testis results in xenograft degeneration
Ectopic xenografting of testis is a feasible option for preservation of male fertility and angiogenesis plays a pivotal role in xenograft survival and functionality. When compared to immature testis, the adult testis is unable to establish functional xenografts due to potentially lower efficiency to induce angiogenesis. The precise molecular mechanism, however, remains elusive. In the present study, we compared adult and immature testis xenografts for survival, maturation and germ cell differentiation. Further, we evaluated differential expression of angiogenesis signalling-specific proteins in adult and immature testis and their xenografts. Results showed that adult testis xenografts degenerated whereas immature testis xenografts survived and established spermatogenesis with the production of haploid germ cells. Protein expression analysis demonstrated that immature testis xenografts were able to establish angiogenesis either through eNOS activation via VEGF and PI3K/AKT or through EGFR-mediated STAT3 pathway. The role of ERK/MAPK pathway in xenograft angiogenesis was ruled out. The absence or reduced expression of angiogenesis-specific proteins in adult testis and its xenografts possibly resulted in poor angiogenesis and in their subsequent degeneration. This study provides insight into angiogenesis mechanism that can be utilized to augment testis xenografting efficiency.
Journal Article
Altered hormonal milieu and dysregulated protein expression can cause spermatogenic arrest in ectopic xenografted immature rat testis
Testis tissue xenografting complemented with cryopreservation is a feasible technique for fertility preservation in children with malignancy receiving gonadotoxic therapy and for endangered species with high neonatal mortality rate. However, xenografted testis of human and most endangered species are known to undergo spermatogenic arrest. In this study, we xenografted immature rat testis onto immunodeficient male mice to investigate the plausible underlying causes of spermatogenic arrest. Histological analysis of xenografted testes collected 8-wk post-grafting showed incomplete spermatogenesis with pachytene-stage spermatocytes as the most advanced germ cells. Although the levels of serum luteinizing hormone and testosterone were normal in recipient mice, those of follicle stimulating hormone (FSH) were significantly high, and specific receptors of FSH were absent in the xenografts. The xenografts demonstrated dysregulated expression of Sertoli cell-transcriptional regulators (WT1 and SOX9) and secretory proteins (SCF and GDNF). In conclusion, results from our study suggested that an altered hormonal milieu in recipients and dysregulated protein expression in xenografts could be a potential cause of spermatogenic arrest in xenografted immature rat testis. Further stereological analysis of xenografts can demonstrate precise cellular composition of xenografts to decipher interactions between germ and somatic cells to better understand spermatogenic arrest in xenografted testis.
Journal Article
Spermatogonial Stem Cells (SSCs) in Buffalo (Bubalus bubalis) Testis
Water buffalo is an economically important livestock species and about half of its total world population exists in India. Development of stem cell technology in buffalo can find application in targeted genetic modification of this species. Testis has emerged as a source of pluripotent stem cells in mice and human; however, not much information is available in buffalo.
Pou5f1 (Oct 3/4) is a transcription factor expressed by pluripotent stem cells. Therefore, in the present study, expression of POU5F1 transcript and protein was examined in testes of both young and adult buffaloes by semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) and immunohistochemical analysis. Further, using the testis transplantation assay, a functional assay for spermatogonial stem cells (SSCs), stem cell potential of gonocytes/spermatogonia isolated from prepubertal buffalo testis was also determined.
Expression of POU5F1 transcript and protein was detected in prepubertal and adult buffalo testes. Western blot analysis revealed that the POU5F1 protein in the buffalo testis exists in two isoforms; large (∼47 kDa) and small (∼21 kDa). Immunohistochemical analysis revealed that POU5F1 expression in prepubertal buffalo testis was present in gonocytes/spermatogonia and absent from somatic cells. In the adult testis, POU5F1 expression was present primarily in post-meiotic germ cells such as round spermatids, weakly in spermatogonia and spermatocytes, and absent from elongated spermatids. POU5F1 protein expression was seen both in cytoplasm and nuclei of the stained germ cells. Stem cell potential of prepubertal buffalo gonocytes/spermatogonia was confirmed by the presence of colonized DBA-stained cells in the basal membrane of seminiferous tubules of xenotransplanted mice testis.
These findings strongly indicate that gonocytes/spermatogonia, isolated for prepubertal buffalo testis can be a potential target for establishing a germ stem cell line that would enable genetic modification of buffaloes.
Journal Article
Fertility preservation through gonadal cryopreservation
Fertility preservation is an area of immense interest in today's society. The most effective and established means of fertility preservation is cryopreservation of gametes (sperm and oocytes) and embryos. Gonadal cryopreservation is yet another means for fertility preservation, especially if the gonadal function is threatened by premature menopause, gonadotoxic cancer treatment, surgical castration, or diseases. It can also aid in the preservation of germplasm of animals that die before attaining sexual maturity. This is especially of significance for valuable, rare, and endangered animals whose population is affected by high neonatal/juvenile mortality because of diseases, poor management practices, or inbreeding depression. Establishing genome resource banks to conserve the genetic status of wild animals will provide a critical interface between ex-situ and in-situ conservation strategies. Cryopreservation of gonads effectively lengthens the genetic lifespan of individuals in a breeding program even after their death and contributes towards germplasm conservation of prized animals. Although the studies on domestic animals are quite promising, there are limitations for developing cryopreservation strategies in wild animals. In this review, we discuss different options for gonadal tissue cryopreservation with respect to humans and to laboratory, domestic, and wild animals. This review also covers recent developments in gonadal tissue cryopreservation and transplantation, providing a systematic view and the advances in the field with the possibility for its application in fertility preservation and for the conservation of germplasm in domestic and wild species.
Journal Article
Capital budgeting
Capital budgeting is an important pat of the financial management of a business organization. It is a process that business houses use to evaluate an investment project. The decision of whether to accept or deny an investment project is capital budgeting decision. Capital budgeting is important because it determines the long-term economic and financial profitability of any investment project. It lays down the future success of a business. The present book aims to develop not only an understanding of the concepts of capital budgeting but also to provide its practical application to help the students to learn both theory and practice of capital budgeting to be used in the financial management of a business organization. It analyzes the capital budgeting practices of corporate enterprises in India in diverse sectors, on comparative basis in order to provide the readers a better insight into the various issues and challenges regarding capital budgeting management.
eBook
Autoimmune-Associated Vasculitis Presenting as Ischemic Stroke With Hemorrhagic Transformation: A Case Report and Literature Review
Autoimmune-associated vasculitis is related to conditions like granulomatosis with polyangiitis (GPA) and eosinophilic polyangiitis with granulomatosis (EGPA), among many others. An unlikely scenario is patients with the above conditions presenting with ischemic strokes before any renal or pulmonary pathology. These conditions are associated with increased antineutrophillic cytoplasmic antibodies (C-ANCA) levels in the blood, and its decline after treatment is directly proportional to the recovery of the patient. We present a case of a previously healthy 38-year-old male patient who presented with acute/subacute ischemic stroke with elevated C-ANCA levels; his MRI brain images revealed multiple posterior circulation infarcts with hemorrhagic transformation. With pulse steroid therapy, he had significant improvement in neurological functions. This case report highlights the importance of maintaining a high degree of suspicion and providing early treatment for autoimmune strokes in young patients with no clear etiology for such a presentation.
Journal Article
Money laundering or foreign contribution! The spirit of governance in NGOs of India
Purpose
The present paper aims to discuss the “money laundering” aspect and related governance practices of third sector, non-government organizations (NGOs). In NGOs globally, foreign contributions are not an old story. But in NGOs, the spotlight on the vulnerability of money laundering in the name of foreign contribution(s) requires special attention. The study highlights the dimension of money laundering in an Indian NGO and related dominance of board leadership about governance issues by way of foreign contribution.
Design/methodology/approach
The present study uses case study method for enlightening the money laundering tussle in a non-government organization and its governance impact on the stakeholders’ interests at large.
Findings
The results stress upon the need for to have strong anti-money laundering practices in non-government organizations in the form of foreign contributions which are still struggling to have a sound governance system in place.
Practical implications
It is of significance to both policymakers and standards setters at the international level in the light of increasing global awareness about anti-money laundering practices of the third sector.
Social implications
There will be an improvement in the corporate management related to money-laundering of these organizations and infuse higher confidence among stakeholders and further lead to their effective regulatory framework.
Originality/value
It is an original paper which highlights the role and significance of money laundering practices in the third sector.
Journal Article