Browsing by Author "Jawalekar, Snehal Sainath"

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    Is highly expressed ACE 2 in pregnant women �a curse� in times of COVID-19 pandemic?
    (Elsevier Inc., 2020-10-28T00:00:00) Dhaundiyal, Ankit; Kumari, Puja; Jawalekar, Snehal Sainath; Chauhan, Gaurav; Kalra, Sourav; Navik, Umashanker
    Angiotensin-converting enzyme 2 (ACE 2) is a membrane-bound enzyme that cleaves angiotensin II (Ang II) into angiotensin (1�7). It also serves as an important binding site for SARS-CoV-2, thereby, facilitating viral entry into target host cells. ACE 2 is abundantly present in the intestine, kidney, heart, lungs, and fetal tissues. Fetal ACE 2 is involved in myocardium growth, lungs and brain development. ACE 2 is highly expressed in pregnant women to compensate preeclampsia by modulating angiotensin (1�7) which binds to the Mas receptor, having vasodilator action and maintain fluid homeostasis. There are reports available on Zika, H1N1 and SARS-CoV where these viruses have shown to produce fetal defects but very little is known about SARS-CoV-2 involvement in pregnancy, but it might have the potential to interact with fetal ACE 2 and enhance COVID-19 transmission to the fetus, leading to fetal morbidity and mortality. This review sheds light on a path of SARS-CoV-2 transmission risk in pregnancy and its possible link with fetal ACE 2. � 2020 Elsevier Inc.
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    Methionine as a double-edged sword in health and disease: Current perspective and future challenges
    (Elsevier Ireland Ltd, 2021-10-25T00:00:00) Navik, Umashanker; Sheth, Vaibhav G.; Khurana, Amit; Jawalekar, Snehal Sainath; Allawadhi, Prince; Gaddam, Ravinder Reddy; Bhatti, Jasvinder Singh; Tikoo, Kulbhushan
    Methionine is one of the essential amino acids and plays a vital role in various cellular processes. Reports advocate that methionine restriction and supplementation provide promising outcomes, and its regulation is critical for maintaining a healthy life. Dietary methionine restriction in houseflies and rodents has been proven to extend lifespan. Contrary to these findings, long-term dietary restriction of methionine leads to adverse events such as bone-related disorders, stunted growth, and hyperhomocysteinemia. Conversely, dietary supplementation of methionine improves hepatic steatosis, insulin resistance, inflammation, fibrosis, and bone health. However, a high level of methionine intake shows adverse effects such as hyperhomocysteinemia, reduced body weight, and increased cholesterol levels. Therefore, dietary methionine in a safe dose could have medicinal values. Hence, this review is aimed to provide a snapshot of the dietary role and regulation of methionine in the modulation of health and age-related diseases. � 2021 Elsevier B.V.
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    Microbiome in Pulmonary Tuberculosis
    (Springer Nature, 2022-03-25T00:00:00) Rakshit, Arnab; Verma, Aarti; Verma, Saloni; Bhatti, Gurjit Kaur; Khurana, Amit; Bhatti, Jasvinder Singh; Jawalekar, Snehal Sainath; Navik, Umashanker
    Tuberculosis (TB) is among the global dominant fatal infection caused by a single organism, and it is still holding its position in spite of the golden age of the antibiotics. The recent studies are mostly focused on finding the prevention of TB rather than curing it because the antimycobacterial chemotherapy is failing constantly due to emerging multidrug resistance (MDR). Further, the intestinal microbiota is the central command for maintaining the homeostasis of the microbial profile of different organs. The change in the intestinal microbiota effects homeostasis by impacting the immune response to the microbial profile of various organs. Thus, it also affects the chance of contracting the infections. Here in this chapter, it is mostly focused on the reason behind the TB getting chance to infect the healthy lung tissue. It is also found that dysbiosis in gut microbiota, which directly affects the lung, plays a key role in giving TB a chance to hold its ground. It also highlights the new curative method which we can apply by correcting the gut microbial profile, which in turn corrects the lung microbial profile and rest of the function will done by body�s own immune system. It is thus found that proper restoration of the microbial profile enhances the immune response and could restore the homeostasis. � The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd. 2022.
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    Various Cellular and Molecular Axis Involved in the Pathogenesis of Asthma
    (Springer Nature, 2021-07-02T00:00:00) Bhatti, Gurjit Kaur; Khurana, Amit; Garabadu, Debapriya; Gupta, Prashant; Jawalekar, Snehal Sainath; Bhatti, Jasvinder Singh; Navik, Umashanker
    Asthma is a chronic inflammatory disease described by impaired lung function, airway hyperresponsiveness, episodic wheezing, and dyspnea. Asthma prevalence has risen drastically, and it is estimated that more than 339 million individuals worldwide had asthma with marked heterogeneity in pathophysiology and etiology. Several factors involved in the progression and development of asthma include allergens, pollutants, obesity, viruses, antigens, and many more, eliciting strong inflammatory and immune responses, causing airflow obstruction, and tightening of respiratory smooth muscle causing the characteristic asthma symptoms. Multiple complex molecular pathways are involved in asthma pathophysiologies such as immunoglobulin E, cytokines, nitric oxide, dendritic cells, leukotrienes, oxidative stress, and inflammatory infiltrate of mast cells, neutrophils, eosinophils, lymphocytes, innate immunity, and many more. The current chapter focuses on illustrating the various molecular pathways that contribute to asthma development and its progression. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.