LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 84

Search options

  1. Article: Hypopituitarism Presenting as Recurrent Episodes of Hypoglycemia: Houssay Phenomenon.

    Rizwan, Tehlil / Arora, Gunjan / Alchalabi, Marwah / Qureshi, Faisal

    Cureus

    2023  Volume 15, Issue 4, Page(s) e37530

    Abstract: Hypopituitarism, a rare disorder, is defined as decreased production and secretion of one or more of the hormones that are normally secreted by the pituitary gland, resulting from the diseases of the pituitary gland itself or the hypothalamus. The ... ...

    Abstract Hypopituitarism, a rare disorder, is defined as decreased production and secretion of one or more of the hormones that are normally secreted by the pituitary gland, resulting from the diseases of the pituitary gland itself or the hypothalamus. The clinical manifestations of this disorder are usually nonspecific and can lead to life-threatening complications and mortality. Here, we present a case of a 66-year-old female patient who was brought to the ER by her family with concerns of altered mentation. The altered mentation was found to be secondary to a severe hypoglycemic episode, which was later discovered to be due to underlying panhypopituitarism with secondary adrenal insufficiency. Endocrinology was consulted and recommended assessment of the hypothalamic-pituitary axis. The tests revealed low levels of serum insulin and C-peptide along with decreased levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), prolactin, cortisol, free thyroxine (T4), and adrenocorticotropic hormone (ACTH). She was started on intravenous hydrocortisone and levothyroxine, which were later switched to oral hydrocortisone and levothyroxine after the stabilization of her blood glucose levels. She was later advised to follow up with endocrinology upon discharge. While evaluating a patient with hypoglycemia, it is important to keep hypopituitarism causing secondary adrenal insufficiency in mind as a differential diagnosis because it can be life-threatening if not recognized early and treated in a timely manner.
    Language English
    Publishing date 2023-04-13
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.37530
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: The Epidemiology of Infectious Diseases Meets AI: A Match Made in Heaven.

    Bothra, Ankur / Cao, Yongguo / Černý, Jiří / Arora, Gunjan

    Pathogens (Basel, Switzerland)

    2023  Volume 12, Issue 2

    Abstract: Infectious diseases remain a major threat to public health [ ... ]. ...

    Abstract Infectious diseases remain a major threat to public health [...].
    Language English
    Publishing date 2023-02-15
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens12020317
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Use of host lipids by the Lyme disease spirochete may lead to biomarkers.

    Arora, Gunjan / Hart, Thomas / Fikrig, Erol

    The Journal of clinical investigation

    2022  Volume 132, Issue 6

    Abstract: Lyme disease is the most common tick-borne disease in North America and Europe, however, current biomarkers inconsistently detect the disease. In this issue of the JCI, Gwynne et al. revealed how the Lyme disease agent Borrelia burgdorferi relies on host ...

    Abstract Lyme disease is the most common tick-borne disease in North America and Europe, however, current biomarkers inconsistently detect the disease. In this issue of the JCI, Gwynne et al. revealed how the Lyme disease agent Borrelia burgdorferi relies on host lipids for growth. The authors used a murine model to show that B. burgdorferi infection led to the production of antibodies against phospholipids, possibly as a consequence of incorporation into the spirochete membrane. Antibodies were induced against phosphatidic acid, phosphatidylcholine, and phosphatidylserine. Notably, no antibodies against cardiolipin were found, distinguishing Lyme disease from syphilis and some other diseases. Sera samples from patients with Lyme disease suggested that these antibodies may help diagnose B. burgdorferi infection and that antibody titers may effectively indicate the response to treatment. These findings suggest that B. burgdorferi-induced anti-lipid antibodies, in conjunction with a careful clinical assessment, may aid in the diagnosis of Lyme disease.
    MeSH term(s) Animals ; Biomarkers ; Borrelia burgdorferi ; Europe ; Humans ; Lipids ; Lyme Disease/diagnosis ; Mice
    Chemical Substances Biomarkers ; Lipids
    Language English
    Publishing date 2022-03-08
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Comment
    ZDB-ID 3067-3
    ISSN 1558-8238 ; 0021-9738
    ISSN (online) 1558-8238
    ISSN 0021-9738
    DOI 10.1172/JCI158254
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: A tick C1q protein alters infectivity of the Lyme disease agent by modulating interferon γ.

    Tang, Xiaotian / Arora, Gunjan / Matias, Jaqueline / Hart, Thomas / Cui, Yingjun / Fikrig, Erol

    Cell reports

    2023  Volume 41, Issue 8, Page(s) 111673

    Abstract: In North America, the Lyme disease agent, Borrelia burgdorferi, is commonly transmitted by the black-legged tick, Ixodes scapularis. Tick saliva facilitates blood feeding and enhances pathogen survival and transmission. Here, we demonstrate that I. ... ...

    Abstract In North America, the Lyme disease agent, Borrelia burgdorferi, is commonly transmitted by the black-legged tick, Ixodes scapularis. Tick saliva facilitates blood feeding and enhances pathogen survival and transmission. Here, we demonstrate that I. scapularis complement C1q-like protein 3 (IsC1ql3), a tick salivary protein, directly interacts with B. burgdorferi and is important during the initial stage of spirochetal infection of mice. Mice fed upon by B. burgdorferi-infected IsC1ql3-silenced ticks, or IsC1ql3-immunized mice fed upon by B. burgdorferi-infected ticks, have a lower spirochete burden during the early phase of infection compared with control animals. Mechanically, IsC1ql3 interacts with the globular C1q receptor present on the surface of CD4
    MeSH term(s) Mice ; Animals ; Interferon-gamma ; CD8-Positive T-Lymphocytes ; Complement C1q ; Lyme Disease ; Ixodes
    Chemical Substances Interferon-gamma (82115-62-6) ; Complement C1q (80295-33-6)
    Language English
    Publishing date 2023-12-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2022.111673
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Malaria: influence of Anopheles mosquito saliva on Plasmodium infection.

    Arora, Gunjan / Chuang, Yu-Min / Sinnis, Photini / Dimopoulos, George / Fikrig, Erol

    Trends in immunology

    2023  Volume 44, Issue 4, Page(s) 256–265

    Abstract: Malaria is caused by Plasmodium protozoa that are transmitted by anopheline mosquitoes. Plasmodium sporozoites are released with saliva when an infected female mosquito takes a blood meal on a vertebrate host. Sporozoites deposited into the skin must ... ...

    Abstract Malaria is caused by Plasmodium protozoa that are transmitted by anopheline mosquitoes. Plasmodium sporozoites are released with saliva when an infected female mosquito takes a blood meal on a vertebrate host. Sporozoites deposited into the skin must enter a blood vessel to start their journey towards the liver. After migration out of the mosquito, sporozoites are associated with, or in proximity to, many components of vector saliva in the skin. Recent work has elucidated how Anopheles saliva, and components of saliva, can influence host-pathogen interactions during the early stage of Plasmodium infection in the skin. Here, we discuss how components of Anopheles saliva can modulate local host responses and affect Plasmodium infectivity. We hypothesize that therapeutic strategies targeting mosquito salivary proteins can play a role in controlling malaria and other vector-borne diseases.
    MeSH term(s) Humans ; Animals ; Female ; Anopheles/parasitology ; Anopheles/physiology ; Saliva ; Mosquito Vectors/parasitology ; Malaria ; Sporozoites
    Language English
    Publishing date 2023-03-22
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2036831-8
    ISSN 1471-4981 ; 1471-4906
    ISSN (online) 1471-4981
    ISSN 1471-4906
    DOI 10.1016/j.it.2023.02.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Stringent Response in Mycobacteria: From Biology to Therapeutic Potential.

    Gupta, Kuldeepkumar Ramnaresh / Arora, Gunjan / Mattoo, Abid / Sajid, Andaleeb

    Pathogens (Basel, Switzerland)

    2021  Volume 10, Issue 11

    Abstract: Mycobacterium ... ...

    Abstract Mycobacterium tuberculosis
    Language English
    Publishing date 2021-11-01
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens10111417
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: An Efficient and Sustainable Approach to Decarboxylative Cross-Coupling Using Silica Coated Magnetic Copper Nanocatalyst for the Synthesis of Internal Alkynes.

    Yadav, Manavi / Srivastava, Anju / Gaur, Rashmi / Gupta, Radhika / Arora, Gunjan / Sharma, Rakesh Kumar

    Frontiers in chemistry

    2022  Volume 9, Page(s) 773855

    Abstract: A highly efficient magnetically separable copper nanocatalyst has been developed for decarboxylative cross-coupling reaction for the alkynylation of haloarenes using alkynoic acid as a reaction partner. The chemical nature, morphology, size, and magnetic ...

    Abstract A highly efficient magnetically separable copper nanocatalyst has been developed for decarboxylative cross-coupling reaction for the alkynylation of haloarenes using alkynoic acid as a reaction partner. The chemical nature, morphology, size, and magnetic properties of the prepared nanocatalyst were studied by SEM, TEM, EDS, FT-IR, VSM, and ICP techniques. Remarkably, this catalyst represents the first successful copper based heterogeneous system for this type of coupling that provides a low-cost, stable, and environmentally friendly magnetically recoverable entity that can be re-used for seven consecutive runs without appreciable loss in its catalytic performance.
    Language English
    Publishing date 2022-01-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2021.773855
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Kinetic Tracking of Plasmodium falciparum Antigens on Infected Erythrocytes with a Novel Reporter of Protein Insertion and Surface Exposure.

    Shao, Jinfeng / Arora, Gunjan / Manzella-Lapeira, Javier / Brzostowski, Joseph A / Desai, Sanjay A

    mBio

    2022  Volume 13, Issue 3, Page(s) e0040422

    Abstract: Intracellular malaria parasites export many proteins into their host cell, inserting several into the erythrocyte plasma membrane to enable interactions with their external environment. While static techniques have identified some surface-exposed ... ...

    Abstract Intracellular malaria parasites export many proteins into their host cell, inserting several into the erythrocyte plasma membrane to enable interactions with their external environment. While static techniques have identified some surface-exposed proteins, other candidates have eluded definitive localization and membrane topology determination. Moreover, both export kinetics and the mechanisms of membrane insertion remain largely unexplored. We introduce Reporter of Insertion and Surface Exposure (RISE), a method for continuous nondestructive tracking of antigen exposure on infected cells. RISE utilizes a small 11-amino acid (aa) HiBit fragment of NanoLuc inserted into a target protein and detects surface exposure through high-affinity complementation to produce luminescence. We tracked the export and surface exposure of CLAG3, a parasite protein linked to nutrient uptake, throughout the Plasmodium falciparum cycle in human erythrocytes. Our approach revealed key determinants of trafficking and surface exposure. Removal of a C-terminal transmembrane domain aborted export. Unexpectedly, certain increases in the exposed reporter size improved the luminescence signal, but other changes abolished the surface signal, revealing that both size and charge of the extracellular epitope influence membrane insertion. Marked cell-to-cell variation with larger inserts containing multiple HiBit epitopes suggests complex regulation of CLAG3 insertion at the host membrane. Quantitative, continuous tracking of CLAG3 surface exposure thus reveals multiple factors that determine this protein's trafficking and insertion at the host erythrocyte membrane. The RISE assay will enable study of surface antigens from divergent intracellular pathogens.
    MeSH term(s) Animals ; Antigens, Protozoan ; Erythrocytes/parasitology ; Luciferases ; Malaria/parasitology ; Parasites/metabolism ; Plasmodium falciparum/metabolism ; Protozoan Proteins/genetics ; Protozoan Proteins/metabolism
    Chemical Substances Antigens, Protozoan ; Protozoan Proteins ; Luciferases (EC 1.13.12.-) ; nanoluc (EC 1.13.12.-)
    Language English
    Publishing date 2022-04-14
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Intramural
    ZDB-ID 2557172-2
    ISSN 2150-7511 ; 2161-2129
    ISSN (online) 2150-7511
    ISSN 2161-2129
    DOI 10.1128/mbio.00404-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Adiponectin in the mammalian host influences ticks' acquisition of the Lyme disease pathogen Borrelia.

    Tang, Xiaotian / Cao, Yongguo / Booth, Carmen J / Arora, Gunjan / Cui, Yingjun / Matias, Jaqueline / Fikrig, Erol

    PLoS biology

    2023  Volume 21, Issue 10, Page(s) e3002331

    Abstract: Arthropod-borne pathogens cause some of the most important human and animal infectious diseases. Many vectors acquire or transmit pathogens through the process of blood feeding. Here, we report adiponectin, the most abundant adipocyte-derived hormone ... ...

    Abstract Arthropod-borne pathogens cause some of the most important human and animal infectious diseases. Many vectors acquire or transmit pathogens through the process of blood feeding. Here, we report adiponectin, the most abundant adipocyte-derived hormone circulating in human blood, directly or indirectly inhibits acquisition of the Lyme disease agent, Borrelia burgdorferi, by Ixodes scapularis ticks. Rather than altering tick feeding or spirochete viability, adiponectin or its associated factors induces host histamine release when the tick feeds, which leads to vascular leakage, infiltration of neutrophils and macrophages, and inflammation at the bite site. Consistent with this, adiponectin-deficient mice have diminished pro-inflammatory responses, including interleukin (IL)-12 and IL-1β, following a tick bite, compared with wild-type animals. All these factors mediated by adiponectin or associated factors influence B. burgdorferi survival at the tick bite site. These results suggest a host adipocyte-derived hormone modulates pathogen acquisition by a blood-feeding arthropod.
    MeSH term(s) Animals ; Mice ; Humans ; Adiponectin ; Tick Bites ; Borrelia burgdorferi Group/physiology ; Lyme Disease ; Ixodes/physiology ; Mammals
    Chemical Substances Adiponectin
    Language English
    Publishing date 2023-10-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2126776-5
    ISSN 1545-7885 ; 1544-9173
    ISSN (online) 1545-7885
    ISSN 1544-9173
    DOI 10.1371/journal.pbio.3002331
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Bulk and single-nucleus RNA sequencing highlight immune pathways induced in individuals during an

    Tang, Xiaotian / Lynn, Geoffrey E / Cui, Yingjun / Cerny, Jiri / Arora, Gunjan / Tomayko, Mary M / Craft, Joseph / Fikrig, Erol

    Infection and immunity

    2023  Volume 91, Issue 11, Page(s) e0028223

    Abstract: Ticks are hematophagous arthropods that use a complex mixture of salivary proteins to evade host defenses while taking a blood meal. Little is known about the immunological and physiological consequences of tick feeding on humans. Here, we performed the ... ...

    Abstract Ticks are hematophagous arthropods that use a complex mixture of salivary proteins to evade host defenses while taking a blood meal. Little is known about the immunological and physiological consequences of tick feeding on humans. Here, we performed the first bulk and single-nucleus RNA sequencing (snRNA-seq) of skin and blood of four persons presenting with naturally acquired, attached
    MeSH term(s) Humans ; Animals ; Guinea Pigs ; Ixodes/genetics ; Tick Bites ; Base Sequence ; Feeding Behavior/physiology ; RNA, Small Nuclear
    Chemical Substances RNA, Small Nuclear
    Language English
    Publishing date 2023-10-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218698-6
    ISSN 1098-5522 ; 0019-9567
    ISSN (online) 1098-5522
    ISSN 0019-9567
    DOI 10.1128/iai.00282-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top